JPH099549A - Molded motor and method of reproducing molded motor - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a mold motor and a method for regenerating a mold motor that facilitates reuse of valuable materials such as iron cores and windings that are wrapped in a molding material at the time of disposal. A winding material and a molding material in which a separation layer covering at least a part of the surface of the winding is molded, wherein the separation layer is soft in an aqueous solution containing a base, and the molding material is a vinyl compound. A mold motor containing at least one of allyl compounds and unsaturated polyester. The regenerating method is to repeat a step of immersing the part covered with the mold material in an aqueous solution containing a base and a step of removing from the aqueous solution and drying at least a part of the aqueous solution permeating the mold material. , Remove the molding material from the motor.

Description

Detailed Description of the Invention

[0001]

The present invention relates to consumer equipment, industrial equipment,
The present invention relates to a mold motor used in office equipment and the like, and particularly to a mold motor that can be easily disposed of after the end of use and a method of regenerating the mold motor.

[0002]

2. Description of the Related Art Conventionally, as a mold stator of a mold motor used in an AC motor, a brushless DC motor, or the like, a structure generally shown in, for example, Japanese Patent Laid-Open No. 61-214740. Figure 5
And FIG. 6 will be described. FIG. 5 is a perspective view showing an appearance of a conventional molded motor, and FIG. 6 is a perspective view showing a stator before being molded. 101 represents an iron core having a slot. A winding 103 is wound around the iron core 101 via an insulator 102. The printed board 106 having the wiring pattern 105 for connecting the terminal portion of the winding 103 and the lead wire 104 is made of the insulator 102.
It is attached to the upper end of the. A molding material 107 that forms an exterior is molded integrally with the stator.

The molding material 107 is, for example, a thermoplastic resin such as polyethylene terephthalate, polyethylene, polypropylene or nylon, or unsaturated polyester,
A thermosetting resin such as a vinyl ester resin or a phenol resin is used as a binder material, and an additive such as calcium carbonate, talc or carbon black is further added. The motor molded in this manner has excellent maintainability and quietness. In addition, the assembly can be easily automated. Further, a mold material having decomposability has been proposed for the purpose of regenerating the molded iron core 101 and the winding 103 after discarding the mold motor (Japanese Patent Application No. 06-091752). This molding material contains unsaturated polyester, a vinyl compound, and an aliphatic polyester as a binder. In this molding material, unsaturated polyester is cross-linked in the same manner as before by heating during molding, but in the molding material of this configuration, the binder is partially immersed by immersing it in a decomposition solution that is an aqueous solution containing a base even after heat-crosslinking. The mechanical strength of the molding material can be greatly reduced. Therefore, the immersion of the decomposition liquid facilitates the peeling of the molding material.

[0004]

SUMMARY OF THE INVENTION Unsaturated polyester,
The molding material containing the aliphatic polyester and the vinyl compound and / or the allyl compound is partially decomposed by the aqueous solution containing the base. However, the penetration of the liquid is slow, and the removal of the molding material cannot be performed efficiently. The present invention
In view of the above problems, it is an object of the present invention to provide a mold motor and a mold motor recycling method that facilitate the removal of the molding material.

[0005]

The molded motor of the present invention includes a molding material in which a winding and a separation layer covering at least a part of the surface of the winding are molded, and the separation layer is softened to an aqueous solution containing a base. In addition, the molding material contains at least one selected from the group consisting of a vinyl compound and an allyl compound and an unsaturated polyester. Here, the separation layer is an aliphatic polyester, a wax containing a fatty acid ester, a vinyl acetate resin,
It is preferable to contain at least one selected from the group consisting of ethylene vinyl acetate resin and polyvinyl butyral. Further, the molding material may further include an aliphatic polyester. Examples of the aliphatic polyester include polycaprolactone, polylactic acid, polyethylene adipate, polybutylene adipate, polyethylene succinate, polybutylene succinate, polycaprolactone diol, polycaprolactone triol, and poly (3-hydroxyalkanoate) which are solid at room temperature. , Or a plurality of different types of poly (3-hydroxyalkanoate) copolymers.

The method for regenerating a molded motor according to the present invention includes a base for a molded motor using a molding material containing at least one selected from the group consisting of a vinyl compound and an allyl compound and an unsaturated polyester and an aliphatic polyester. A step of immersing in an aqueous solution for a certain period of time,
The step of taking out the aqueous solution and drying at least a part of the aqueous solution that has permeated the mold motor is repeated at least once to remove the molding material. Further, the method of regenerating a molded motor according to the present invention, at least a portion of the molded motor covered with the molding material is
The mold material is immersed in an aqueous solution containing at least a base, and a physical impact is applied to the surface of the mold motor to separate the mold material.

Further, according to the method of regenerating a molded motor of the present invention, at least a portion of the molded motor covered with the molding material is dipped in an aqueous solution containing at least a base, and the surface of the molded motor is subjected to physical impact. In addition, by repeating the step of peeling off at least a part of the molding material and the step of drying at least a part of the aqueous solution that permeates the molding material of the motor taken out of the aqueous solution, The mold material is peeled off. Here, especially for a molded motor in which an insulator made of a thermoplastic resin is also molded, the drying temperature is set to a temperature lower than the melting point of the thermoplastic resin. In addition, in the step of immersing in the aqueous solution, it is preferable to heat to a temperature not higher than the boiling point of the aqueous solution.

[0008]

In the molded motor of the present invention, the separation layer softening to the aqueous solution containing the base is arranged between the molding material and the winding. When this separation layer is immersed in an aqueous solution containing a base, it partially decomposes to lower the molecular weight, or partially dissolves to be softened. Therefore, by permeating the aqueous solution containing a base into this portion, the mold material can be easily removed together with at least a part of the separation membrane even if the mold material is not completely decomposed. In the method of regenerating a molded motor according to the present invention, when the aqueous solution that has penetrated into the molded motor is dried, a difference in drying shrinkage occurs due to unevenness of the drying speed that naturally occurs on the surface portion of the stator, and internal stress occurs. At this time, cracks occur depending on the magnitude of stress, and the mold material partly peels off naturally,
The cracking facilitates the penetration of the aqueous solution into the molding material. Therefore, by repeating the immersion in the aqueous solution and the drying, the permeation of the aqueous solution is accelerated and the mold material is easily peeled off.

When the mold motor is dipped in an aqueous solution containing a base, the molding material contains the aqueous solution and is softened. Therefore, by applying a physical impact to the surface of the stator, it is possible to gradually exfoliate in the thickness direction, facilitate penetration of the aqueous solution, and accelerate removal of the molding material. For a molded motor in which an insulator made of a thermoplastic resin is also molded, by drying at a temperature lower than the melting point of the insulator, the state before molding can be reproduced without deformation of the insulator during drying. . Therefore,
Not only can metals be recycled from discarded motors,
Defective products at the time of molding in the manufacture of mold motors,
It is also possible to repair broken wires and reuse them.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred first embodiment of the molded motor of the present invention will be described with reference to FIG. FIG. 1 is a sectional view of a molded motor that is an AC motor (or a brushless DC motor) according to an embodiment of the present invention. A shaft 9 of a rotor 3 is rotatably supported by a bracket 10 on the bracket 2. The iron core 7 is wound with a copper wire 6 whose surface is enamel-treated. A mold stator 1 is formed by molding a molding material 8 on the outer periphery of these. This stator has
A flange portion 4 having a plurality of mounting holes 5 for mounting on a chassis of a device is integrally provided. The molding material 8 contains at least one of unsaturated polyester and aliphatic polyester, and a vinyl compound or an allyl compound.
Reference numeral 11 is a separation layer arranged on the surface of the winding wire 6, and is covered with the molding material 8 together with the winding wire 6. In the present embodiment, an example in which the flange portion 4 is formed of the molding material 8 is shown, but it goes without saying that a configuration without a flange portion may be adopted as in the conventional example shown in FIG.

The molding material 8 is heat (or light) curable in which the double bond contained in the unsaturated polyester and the double bond contained in the vinyl compound and / or the allyl compound undergo addition polymerization by heat or light. By the way, even when this mold material is cured, the aliphatic polyester contained in the mold material has good compatibility with the unsaturated polyester, and therefore, the ester bond portion of the cured original unsaturated polyester, Adjacent to this is at least a portion of the aliphatic polyester. Therefore, the ester bond contained in the main chain of the former unsaturated polyester is easily decomposed through the aliphatic polyester, and the ester bond part contained in the unsaturated polyester can be solvolytically decomposed at a low temperature.

The unsaturated polyester is a solution of a copolymerizable monomer of unsaturated polyester alkyd, and is an unsaturated polybasic acid, or a saturated polybasic acid reacted with a glycol. The unsaturated polybasic acid is, for example, maleic anhydride, fumaric acid, itaconic acid, citraconic acid and the like. The saturated polybasic acid is, for example, phthalic anhydride, isophthalic acid, terephthalic acid, adipic acid, sebacic acid, tetrahydrophthalic anhydride, methyltetrahydrophthalic anhydride, endomethylenetetrahydrophthalic anhydride, het acid, tetrabromophthalic anhydride, etc. is there. Examples of glycols include ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, neopentyl glycol, 1,3-butanediol, 1,6-hexanediol, hydrogenated bisphenol A, bisphenol A propylene oxide compound, and dibromoneopentyl glycol. Is.

Vinyl compounds or allyl compounds are, for example, styrene, vinyltoluene, divinylbenzene, α-
Methyl styrene, methyl methacrylate, vinyl acetate, diallyl phthalate, diallyl isophthalate, diallyl tetrabromophthalate, phenoxyethyl acrylate, 2-hydroxyethyl acrylate, 1-6 hexanediol diacrylate, etc. can be used.

The aliphatic polyester mixed in the molding material is a saturated polyester having biodegradability and is a thermoplastic resin. For example, polycaprolactone, polylactic acid,
Polyglycolic acid represented by the following formula (1), formula (2)
Polycaprolactone diol represented by the formula (2), polycaprolactone triol represented by the formula (3), polyethylene adipate, polybutylene adipate, polyethylene succinate, polysuccinate, which is a copolymer resin composed of the glycol represented by the formula (4) and an aliphatic dicarboxylic acid. Butylene succinate, and poly (3-hydroxyalkanoate) such as 3-hydroxypropionate, 3-hydroxybutyrate, 3-hydroxyvalerate, 3-hydroxyoctanoate, and 3-hydroxybutyrate. One or more of a copolymer of different types of poly (3-hydroxyalkanoate), such as a copolymer of 3-hydroxyvalerate, a copolymer of 3-hydroxybutyrate and 3-hydroxypropionate, and the like. Can be used.

[0015]

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[0016]

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In the formulas (2) and (3), R represents a hydrocarbon group. The molding material contains the above-mentioned unsaturated polyester and aliphatic polyester, and further a vinyl compound and / or an allyl compound, and it is particularly preferable that at least a part of the aliphatic polyester is soluble in the vinyl compound and / or the allyl compound. For example, if styrene, vinyltoluene, and α-methylstyrene are selected as vinyl compounds,
Polycaprolactone, polyethylene adipate, polycaprolactone diol, and polycaprolactone triol, which are soluble even at room temperature, have good solubility,
Especially recommended. Since the molding material of the present invention contains an aliphatic polyester, it can be partially solvolytically decomposed by an aqueous solution containing a base, which greatly reduces the mechanical strength. Therefore, the mold material can be easily removed only by immersing the mold stator in this aqueous solution.

The aqueous solution containing a base can be constituted so as to contain at least a base and water and, if necessary, a hydrophilic solvent. The base is one which is dissociated to generate a hydroxyl group by contact with water, and examples thereof include metal hydroxides such as sodium hydroxide and potassium hydroxide, metal oxides such as sodium oxide and calcium oxide, and sodium ethoxide.
One or more can be selected from metal alkoxides such as potassium t-butoxide. The hydrophilic solvent is an organic solvent having a good affinity with water, for example, lower alcohols such as ethanol, methanol and isopropyl alcohol, ethylene glycol, propylene glycol, diethylene glycol diethyl ether, dioxane, tetrahydrofuran, acetone and the like. Or you can choose more than one.

Molding materials include beryllium oxide, magnesium oxide, magnesium hydroxide, calcium oxide, calcium hydroxide, in addition to the unsaturated polyester and aliphatic polyester, vinyl compound or allyl compound described above.
Thickeners such as zinc oxide, benzoic acid, phthalic anhydride, tetrahydrophthalic anhydride, maleic anhydride; polyethylene, polypropylene, polystyrene, vinyl acetate resin,
Shrinkage inhibitors made of thermoplastic resins such as polyvinyl butyral, polymethyl methacrylate, ethylene vinyl alcohol resins, acrylic copolymer resins, saturated polyester resins; release agents such as stearic acid, zinc stearate, calcium stearate; benzoyl peroxide, Hardeners such as t-butyl perbenzoate, t-butyl peroxybenzoate and t-butyl peroctoate; metal salts such as cobalt naphthenate and cobalt octoate,
Polymerization accelerators such as amines such as triethanolamine and diethylaniline; waxes such as Hoechst wax, carnauba wax, and paraffin; colorants such as titanium white, chromium oxide, and carbon black You can

In order to further increase the mechanical strength at the time of molding, the molding material includes carbonates such as calcium carbonate and magnesium carbonate, calcium sulfate, barium sulfate,
(Sulfite) such as calcium sulfite, clay, mica, glass balloon, montmorillonite, silicic acid, silicates such as kaolin and talc, silica, siliceous earth, iron oxide, pumice balloon, titanium oxide, oxidation of alumina, etc. Substances, hydroxides such as aluminum hydroxide and magnesium hydroxide, graphite, glass fibers, carbon fibers, inorganic additives such as asbestos fibers, shell fibers such as wood powder and chaff, cotton, paper particles, nylon fibers , An organic additive such as wood cellulose can be mixed.

The major feature of this embodiment is that before the winding 6 and the iron core 7 are molded with the above molding material 8, at least a part of the surface of the winding 6 is softened by an aqueous solution containing a base. That is, the separation layer 11 was formed. As a result, when the mold stator 1 is immersed in an aqueous solution containing a base to reduce the strength of the molding material 8 and separate the molding material 8, the separation layer 11 is softened by the aqueous solution that has penetrated the molding material 8. As a result, the molding material 8 is easily separated from the surface of the winding 6. Therefore, even if the strength is not sufficiently reduced, the mold material 8 can be easily removed, and the regeneration of the mold motor is accelerated.

The separating layer 11 which is softening to an aqueous solution containing a base is made of polyethylene glycol, polyvinyl alcohol, carboxymethyl cellulose, hydroxyethyl cellulose, alginic acid, alginate, polyacrylic acid or other water-soluble resin, gum arabic or locust. Water-soluble gums such as bean gum, guar gum, karaya gum, and tamarind gum, aliphatic polyesters, waxes containing fatty acid esters, vinyl acetate resins, ethylene vinyl acetate resins, polyvinyl butyral and the like can be used.
The water-soluble resin or water-soluble gum has solubility / swellability in water and softens. The aliphatic polyester is the same as that described above. When the wax containing the aliphatic polyester and the fatty acid is immersed in an aqueous solution containing a base, a part of the ester portion is decomposed and the separation layer is softened. Vinyl acetate resin, ethylene vinyl acetate resin or polyvinyl butyral is partially dissolved and swelled in an aqueous solution containing a base to be softened. The water-soluble resin or water-soluble gum has a large degree of softening with respect to water, but if the amount of moisture absorption during the production of the mold motor is large, uneven bubbles are generated during the molding,
It easily causes defective products. Therefore, it is necessary to pay attention to the humidity adjustment of the resin or gum and the drying conditions. Therefore, at least one of aliphatic polyester, wax containing fatty acid ester, ethylene vinyl acetate resin or polyvinyl butyral, which is a material having low hygroscopicity at room temperature, is used.
It is particularly preferable to form the separation layer by including one.

The separating layer is required to exhibit softening properties in an aqueous solution containing a base, contains at least one of the above, and further contains a general resin material such as petroleum resin or polyethylene, and inorganic particles such as calcium carbonate. Of course, a mixed configuration can be used. The wax containing a fatty acid ester preferably contains 20 wt% of a fatty acid ester in order to increase the degree of softening by an aqueous solution containing a base. For example, natural waxes such as carnauba wax, candelilla wax, rice wax, wax and lanolin can be used. Synthetic waxes such as waxes, hydrogenated castor oil, mono- or diesters obtained from 12-hydroxystearic acid, ester waxes, partially saponified ester waxes, montan waxes can be used.

The separating layer is formed by heating and melting and softening a softening material in an aqueous solution containing a base and coating it with a brush, or dissolving it in water, an organic solvent such as toluene or ethanol, and coating it with a brush. Or by drying after spray coating, or by arranging a film made of a material softening to an aqueous solution containing a base made of the above-mentioned material in contact with the winding. However, when an organic solvent is used, it is preferable to select a solvent that does not violate the enamel of the winding. Although the separation layer covers the entire winding in the present embodiment, the separation of the molding material is promoted by covering a part of the surface of the winding. However,
Since the molding material 8 is thick, it is preferable to form at least a part of the separation layer 11 on the surface of the winding 6 at the bottom 1a and the top 1b of the molded stator 1 where the penetration of the aqueous solution is slow. It is also preferable to form the separation layer 11 and fill the gap between the windings. At this time, the mold material 8 does not enter between the windings, and when the mold motor is regenerated,
Good winding can be collected without the molding material attached.

The thickness of the separation layer 11 should be such that separation of the molding material 8 from the winding 6 can be promoted. However, in order not to significantly reduce the mechanical strength of the molded motor, 5 mm
The following is desirable. In the conventional mold motor in which the separation layer is not arranged, the mold material has to be peeled off by immersing it in an aqueous solution containing a base for a long period of time to solvolytically decompose the mold material, which requires a lot of time. However, in the mold stator having the separation layer described in this example, the mold stator 1 is regenerated by immersing it in an aqueous solution containing a base and immersing the aqueous solution up to the separation layer 11 without degrading the molding material 8. Since the molding material 8 can be peeled off together with the separation layer 11, the molding material 8 can be easily removed and the molded stator 1 can be regenerated in a short time. Further, the molding material 8 does not penetrate into the windings from the portion where the windings 6 are covered with the separation layer 11, and the good windings 6 can be easily recovered when the molded stator 1 is regenerated.

The following is a detailed experimental example of the molded stator of the present invention. Curing of the molding material was carried out by heating at 120 ° C. for 30 minutes. [Example 1] Unsaturated polyester resin containing unsaturated polyester (manufactured by Nippon Shokubai Co., Ltd., trade name: Epolak)
80 parts by weight, styrene 13 parts by weight, polycaprolactone (molecular weight 40,000, manufactured by Daicel Chemical Co., Ltd., trade name: Praxel) 7 parts by weight, curing agent t-butylperoxybenzoate (manufactured by NOF Corporation), product Name: Perbutyl Z) 1 part by weight, calcium carbonate 10 having an average particle size of 15 μm or less
A molding material was manufactured by kneading a mixture of 0 parts by weight, 150 parts by weight of calcium carbonate having a particle diameter of 50 to 300 μm, and 50 parts by weight of glass fiber having a length of 5 mm with a kneader. Before molding the iron core 7 and winding 6 with this molding material,
Polycaprolactone (molecular weight 70,000, Daicel Chemical Co., Ltd.)
(Product name: Praxel, melting point: 60 ° C) is heated and melted at 80 ° C and applied to almost the entire surface of the winding with a brush,
After cooling, the separation layer 11 having a thickness of about 0.5 mm was formed. At this time, polycaprolactone partially penetrated also between the windings. The thickest portion of the molding material 8 was about 8 mm at the bottom portion 1a and the top portion 1b of the mold stator 1, and the thinnest portion was about 3 mm at the side surface portion 1c of the mold stator 1.

[Comparative Example 1] A molded stator 1 was prepared by directly molding the molding material 8 on the surface of the winding 6 without forming the separation layer 11. Also in this stator, the thickest bottom portion 1a and the top portion 1b had a thickness of a little over 8 mm, and the thinnest portion also had the side face portion 1c with a thickness of just over 3 mm.

Reproduction of the prototype mold stator is 80
The mold material 8 was immersed in a 1N aqueous solution of sodium hydroxide heated to 300 ° C. for 300 hours. After the immersion, each mold stator was taken out, and the surface of the mold was tapped with a hammer to try to peel off the mold material 8. Side surface portion 1 of molded stator 1 created in Example 1
In c, the mold material peeled off, and the mold material on the bottom portion 1a and the top portion 1b also peeled off, and the winding 6, the iron core 7, and the insulator could be separated. This is because the separation membrane 11 was decomposed by permeation of the aqueous solution from the side surface portion 1c. The insulator is for ensuring electrical insulation between the winding wire 6 and the iron core 7. However, in the comparative example,
Although the molding material on the side surface portion 1c was peeled off, the molding material at the bottom portion 1a and the top portion 1b could not be completely separated because the aqueous solution had penetrated only about 4 mm. At least 500 to completely remove the mold material
Needed time. That is, the arrangement of the separation layer 11 facilitated the regeneration of the molded stator.

Instead of the polycaprolactone of Example 1, polybutylene succinate, an aliphatic polyester (manufactured by Showa Highpolymer Co., Ltd., trade name: Bionole, melting point: 114 ° C.), carnauba wax (melting point: 85) ℃),
The same effect could be obtained when the hardened castor oil (melting point: 87 ° C.) was heated above the melting point and applied to the winding to form the separation layer 11.

[Example 2] Unsaturated polyester resin containing unsaturated polyester (manufactured by Nippon Shokubai Co., Ltd., trade name:
Epolac) 80 parts by weight, styrene 13 parts by weight, polycaprolactone (molecular weight 40,000, manufactured by Daicel Chemical Co., Ltd., trade name: Praxel) 7 parts by weight, polyvinyl butyral (manufactured by Sekisui Chemical Co., Ltd., trade name: BLS) 3 parts by weight, curing agent t-butyl peroxybenzoate (manufactured by NOF CORPORATION, trade name: Perbutyl Z) 1 part by weight, 100 parts by weight of calcium carbonate having an average particle size of 15 μm or less, particle size of 50 to 300 μm. 150 parts by weight of calcium carbonate,
And a mixture of 50 parts by weight of 5 mm long glass fiber was kneaded with a kneader to produce a molding material. Polyvinyl butyral is mixed in this molding material.
The penetration of an aqueous solution containing a base is improved in comparison with.

Before molding the iron core and the winding with this molding material, polyvinyl butyral (manufactured by Sekisui Chemical Co., Ltd.,
Brand name: BMS) is dissolved in a mixed solvent of ethanol and toluene (1: 1 weight ratio), and a 10 wt% solution is applied to the surface of the winding wire with a brush and dried to form a separation layer 1 having a thickness of about 0.3 mm.
1 was formed. The thickest part of the mold material was about 8 mm at the bottom portion 1a and the top part 1b of the mold stator 1, and the thinnest portion was about 3 mm at the side surface part 1c of the mold stator 1.

[Comparative Example 2] Using the molding material of Example 1, the molding material was directly molded on the surface of the winding without forming the separation layer 11 to prepare the molded stator 1.
Also in this stator, the bottom portion 1a and the top portion 1b are the thickest at a portion of 8 mm and the thinnest portion is the side portion 1c.
The thickness was a little over 3 mm.

Regeneration of these molded stators was performed by using 50 parts by weight of a 2N aqueous solution of sodium hydroxide and 50 parts of ethanol.
A mixed solution consisting of parts by weight was heated to 40 ° C. and immersed for 200 hours. After the immersion, each mold stator was taken out, and the surface of the mold was tapped with a hammer without drying to try to peel the mold material. In the side surface portion 1c of the molded stator prepared in Example 2, the mold material peeled off, and the separation layer 11 softened, and the mold material on the bottom portion 1a and the top portion 1b could also peel off. However, in Comparative Example 2, although the mold material on the side surface portion 1c was peeled off, although it was easier to permeate than in Comparative Example 1, the bottom portion 1a and the top portion 1c were also removed.
Since the aqueous solution penetrated only about 3 mm in the molding material in b, the molding material could not be completely separated. It took at least 450 hours to completely remove the molding material. Further, instead of the polyvinyl butyral of Example 2, an ethanol dispersion containing 10 wt% of a vinyl acetate resin (manufactured by Sekisui Chemical Co., Ltd., trade name: Esnil), or an ethylene vinyl acetate resin (Mitsui DuPont Polychemical ( Co., Ltd., trade name: EVAFLEX 45) 20 wt% in toluene solution is applied and dried to form separation layer 1
In the case of 1, the same effect could be obtained. In the examples, the mold material is shown as an example containing an aliphatic polyester, but even if the molding material does not contain an aliphatic polyester,
The regeneration of the molded stator was improved by forming the separation layer 11.

A preferred embodiment of the molded motor regenerating method of the present invention will be described with reference to FIG. The method of regenerating a molded motor according to the present embodiment is such that at least a portion of the molded motor using a molding material containing an unsaturated polyester and an aliphatic polyester and further containing a vinyl compound and / or an allyl compound is covered with a base material. Immersion step 20 of immersing in an aqueous solution containing a certain period of time, drying step 21 of drying at least a part of the aqueous solution permeating the immersed mold motor, and whether the molding material 8 has been sufficiently removed by the drying step 21. Confirmation step 2 of confirming whether or not, and if insufficient, reimmerse in an aqueous solution containing a base
The mold material 8 is separated by repeating the dipping step 20 and the drying step 21, and the metals inside are taken out.

A method of regenerating the molded motor according to the present embodiment with respect to the molded motor shown in FIG. 1 will be described below. Therefore, since the motor shown in FIG. 1 is a molded motor in which the stator is molded, the regeneration of the motor mainly describes a method of regenerating the internal winding 6 and the iron core 7 from the molded stator 1. Of course, this regenerating method can be carried out without separating the rotor from the mold motor. The symbols in the figure are the same as those described above. In this embodiment, when the mold stator 1 is dried after being dipped in the aqueous solution, a drying shrinkage force is generated as a stress due to unevenness of drying which naturally occurs when the infiltrated aqueous solution is dried, and the molding material 8 is cracked. . When the number of cracks increases, the mold material spontaneously peels off, and the aqueous solution containing a base easily penetrates into the inside of the cracks, and the decomposition of the mold material 8 in the thickness direction is accelerated. Therefore, the molding material 8 can be removed earlier than just immersing it in the aqueous solution, and the winding and the iron core inside can be easily taken out to facilitate the regeneration of the molded stator 1. In the confirmation step 22, not only the degree of cracking of the molding material 8 can be confirmed, but also the molding material 8 can be positively peeled off by hitting the surface with a hammer or the like.

The dipping step 20 in which the mold stator 1 is dipped in an aqueous solution containing at least a base is carried out by placing at least the mold stator 1 and the base in a container such as a ball mill pot made of pottery or stainless steel having a diameter of the mold stator 1 or more. It can be carried out by adding an aqueous solution containing. At this time, in order to accelerate the solvolysis of the molding material 8, it is preferable to at least heat the aqueous solution containing the base while immersing the molded stator 1. However, when heating to a temperature above the boiling point of the aqueous solution, the aqueous solution is heavily consumed, and the solution management during the regeneration treatment becomes complicated. Therefore, it is preferable to heat to a temperature lower than the boiling point of the aqueous solution.

In the drying step 21, it is preferable that the mold material is heated to a temperature higher than the boiling point of the aqueous solution in order to cause large cracks in the molding material. However, the insulator (not shown) arranged between the winding 6 and the iron core 7 is
Generally, it is formed from a thermoplastic resin such as polyethylene terephthalate, polybutylene terephthalate, polycyclohexane terephthalate, etc. When heated above this melting point, the insulator melts and expands from the inside of the molded stator, separating the winding from the iron core. It will be difficult. Therefore, it is heated at a temperature below the melting point of this insulator. For example, polyethylene terephthalate has a melting point of 256 ° C., so 20
It is recommended to heat at a temperature up to about 0 ° C. Detailed examples are shown below.

[Embodiment 3] Each of the mold stators manufactured in the above-mentioned Embodiments 1 and 2 and Comparative Examples 1 and 2 and a 1N sodium hydroxide aqueous solution were put in a stainless steel container, and
After being left in a constant temperature bath at 20 ° C. for 20 hours, the molded stator was dried at 120 ° C. for 1 hour. The peeling of the molding material 8 was tried by repeating this immersion and drying. The results are shown in Table 1. It should be noted that the number of times is the number of times of repeating the dipping and drying required for completely removing the molding material from the mold stator 1, and the total regeneration time is the total time of the dipping time and the drying time.

[0039]

[Table 1]

As can be seen from Table 1, in any case, the regeneration can be completed in a shorter time than the regeneration treatment by only the immersion as described above. For example, the molded stator prototyped in Example 1 is 30
It took about 0 hours, but in this embodiment, the repetition was 11 times.
It is regenerated in 231 hours including the number of times, that is, the immersion and the drying, and the regeneration speed is greatly improved. Further, it can be seen that the mold motor having the separation layer 11 of the present invention described above is also very effective in the mold motor regenerating method of this embodiment. Further, Table 2 shows the results when the mold material 8 was removed by lightly tapping with a hammer for several minutes after drying and then immersed again in the aqueous solution. It can be seen that the mold stator can be regenerated even more simply by removing the extra molding material 8.

[0041]

[Table 2]

In the present embodiment, the container such as a ball mill pot was left in a constant temperature bath for heating, but it is also possible to dispose a heater in the container or heat the container by radiating infrared rays.

A second preferred embodiment of the method for regenerating a molded motor according to the present invention will be described with reference to FIG. The method of regenerating a molded motor according to the present embodiment includes at least a portion of a molded motor including a unsaturated polyester and an aliphatic polyester and further containing a vinyl compound and / or an allyl compound, which is covered with the molding material. It comprises a peeling step 30 of dipping the mold material by immersing it in an aqueous solution containing a base and applying a physical impact to the surface of the mold motor, and a separating step 31 of separating and separating the mold material 8 thereafter. The method of regenerating the molded motor shown in FIG. 1 will be described below. Therefore, since the motor shown in FIG. 1 is a molded motor in which the stator is molded, the regeneration of the motor mainly describes a method of regenerating the internal winding 6 and the iron core 7 from the molded stator 1. Of course, this regenerating method can be carried out without separating the rotor from the mold motor.

The peeling step 30 of peeling the mold material by immersing the mold stator 1 in an aqueous solution containing at least a base and applying a physical impact to the surface of the mold stator 1 to separate the mold material from the mold stator 1 or more is performed. It can be carried out by putting an aqueous solution containing at least the mold stator 1 and a base into a ball mill pot having a diameter and rotating the whole ball mill pot. At this time, the mold stator 1 collides with the inner wall of the ball mill pot, whereby a physical impact can be applied to the surface of the mold stator 1. In order to further increase the physical impact, it is preferable that balls such as agate, stainless steel and zirconia are also put in the ball mill pot. In order to accelerate the solvolysis of the molding material 8, it is preferable to heat at least the aqueous solution containing the base while immersing the molding stator 1. In this embodiment, the mold material 8 is first partially solvolytically decomposed by an aqueous solution containing a base, and the strength is lowered. At the same time as the immersion, a physical impact is sometimes applied to the surface, so that the mold material 8 whose strength has decreased is separated from the mold stator 1, and the surface of the mold material 8 that is not sufficiently immersed always appears. Therefore, the aqueous solution containing the base is efficiently permeated into the molding material 8 and the removal of the molding material 8 is accelerated. Separation step 3 for separating and separating the molding material 8 from the winding 6 and the iron core 7
1 is, for example, discharged together with the aqueous solution from a ball mill pot, separates the solid matter and the solution with a mesh-shaped saucer, and then takes out only the metals with a magnet etc. The small pieces of can be sorted and separated. Detailed examples are shown below.

[Embodiment 4] Each of the mold stators manufactured in the above-mentioned Embodiments 1 and 2 and Comparative Examples 1 and 2, a 1N sodium hydroxide aqueous solution, and a stainless steel ball having a diameter of 10 mm were put in a ball mill pot, and The pot was rotated on a rotary mount in a constant temperature bath at ℃. In the mold stators produced in Examples 1 and 2, most of the molding material 8 was removed in 50 hours, and a lump of the winding 6 and the iron core 7 was obtained. Also, in Comparative Examples 1 and 2, most of the molding material 8 was removed in about 150 hours, and the lump of the winding wire 6 and the iron core 7 could be obtained. I was able to play.

In this embodiment, a container such as a ball mill pot was rotated to cause a physical impact by the molded stator 1 itself hitting the inner wall of the pot or the stainless steel ball hitting the stator. Of course, you can also shake itself. In addition, the heating of the aqueous solution and the molded stator is not limited to heating the gantry as described in the present embodiment, but it is of course possible to heat only the container by infrared rays or heat by disposing a heater inside the container. However, heating above the boiling point of the aqueous solution results in severe consumption of the aqueous solution, which complicates solution management during the regeneration treatment. Therefore, it is preferable to heat to a temperature lower than the boiling point of the aqueous solution.

Further, after the mold motor is dipped in the aqueous solution containing a base as described in FIG. 3, it is left for a certain period of time in a peeling step 31 in which a physical shock is applied to the surface, and then the mold motor is molded as described in FIG. Remove the motor and dry process 2
1 is performed, and the peeling step 31 is performed again through the confirmation step 22. The mold motor regenerating method includes the effect of removing the molding material while being immersed in the aqueous solution, the strength decrease due to the occurrence of cracks in the drying step 21, and the aqueous solution. This is the recommended method because it can achieve both the penetration improvement effect of the above and the regeneration of the molded motor is accelerated. In each of the embodiments, only the reproduction of the mold stator 1 from which the rotor 3 of the mold motor is removed is described. Of course, the rotor 3 is not removed from the mold motor, and the mold material is immersed in an aqueous solution containing a base. It is also possible to perform the separation process of 8.

In each of the above-mentioned embodiments, the molding of the molded stator 1 used in the brushless DC motor or AC motor has been described. However, as shown in FIG. The molded motor having a completely different structure such as the linear motor and the linear motor can be created as a motor that facilitates the regeneration of metals by using the molded motor having the molding material and the separation layer described in this embodiment. The regeneration of the metal can be easily accelerated by the method for regenerating the molded motor of the present invention. The structure will be briefly described with reference to FIG. Four
Reference numeral 0 is a mold motor having a wire-wound rotor 41, 41 is a winding wire generally made of copper as an electric conductor, 42 is the above-mentioned molding material, 43 is a field, 45 is a rotary shaft, and 46 is a bearing. By forming a separation layer (not shown) also on the surface of the winding 41, it is possible to form a molded motor that is easier to regenerate, and the motor having this configuration can regenerate the winding by the molded motor regenerating method of the present invention. Can be done efficiently.

[0049]

INDUSTRIAL APPLICABILITY As described above, the molded motor of the present invention is capable of decomposing the molding material by immersing it in an aqueous solution containing a base and easily regenerating metals such as windings and iron cores. Further, according to the recycling method of the present invention, the removal of the molding material can be accelerated and the metals can be easily recycled.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a molded motor according to an embodiment of the present invention.

FIG. 2 is a diagram showing a mold motor recycling process in one embodiment of the present invention.

FIG. 3 is a diagram showing a mold motor recycling process in another embodiment of the present invention.

FIG. 4 is an exploded perspective view showing the configuration of a molded motor according to another embodiment of the present invention.

FIG. 5 is a perspective view showing an appearance of a conventional molded motor.

FIG. 6 is a perspective view showing an appearance of a stator of the motor before being molded.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Molded stator 2 Bracket 3 Rotor 4 Flange part 5 Mounting hole 6 Winding 7 Iron core 8 Mold material 9 Rotor shaft 10 Bearing 11 Separation layer 20 Immersion step 21 Drying step 22 Checking step 30 Stripping step 31 Separation step

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fumitoshi Yamashita 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Seiji Kurosumi 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 72) Inventor Junko Kaneko 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (6)

[Claims] 1. A winding material and a molding material in which a separation layer covering at least a part of the surface of the winding is molded, wherein the separation layer is softening to an aqueous solution containing a base, and the molding material is vinyl. A molded motor comprising an unsaturated polyester and at least one selected from the group consisting of a compound and an allyl compound. 2. The molded motor according to claim 1, wherein the separation layer contains at least one selected from the group consisting of an aliphatic polyester, a wax containing a fatty acid ester, a vinyl acetate resin, an ethylene vinyl acetate resin, and a polyvinyl butyral. 3. The molding material further contains an aliphatic polyester, and the aliphatic polyester is solid polycaprolactone, polylactic acid, polyethylene adipate, polybutylene adipate, polyethylene succinate, polybutylene succinate, polycaprolactone at room temperature. The mold motor according to claim 1, which is one or more of a copolymer composed of a diol, a polycaprolactone triol, a poly (3-hydroxyalkanoate), or a plurality of different kinds of poly (3-hydroxyalkanoate). 4. A mold motor using a molding material containing at least one selected from the group consisting of a vinyl compound and an allyl compound and an unsaturated polyester and an aliphatic polyester, at least a portion covered with the molding material is a base. The mold material is peeled from the mold motor by repeating a step of immersing the mold material in an aqueous solution containing the water and a step of drying at least a part of the aqueous solution permeating the mold material of the motor taken out from the aqueous solution. A method for reclaiming a molded motor, which is characterized in that 5. A mold motor using a molding material containing at least one selected from the group consisting of a vinyl compound and an allyl compound and an unsaturated polyester and an aliphatic polyester, at least a portion covered by the molding material. A method for reclaiming a molded motor, which comprises immersing in an aqueous solution containing a base and applying a physical impact to the surface of the molded motor to peel off the molding material. 6. A mold motor using a molding material containing at least one selected from the group consisting of a vinyl compound and an allyl compound and an unsaturated polyester and an aliphatic polyester, at least a portion covered by the molding material. A step of immersing in an aqueous solution containing a base and peeling off at least a part of the mold material by applying a physical impact to the mold motor surface;
A method of regenerating a molded motor, wherein the step of drying at least a part of the aqueous solution that has penetrated into the molding material of the motor taken out of the aqueous solution is repeated to peel the molding material from the molding motor. .