JPS59201813A - Method and mold for preparing rubber or plastic molded article without spew - Google Patents

Abstract

PURPOSE:To obtain a molded article having no spew and having good appearance, in preparing a molded article by supplying a molding material to a mold to which a plasma sprayed film having fine voids of a particulate substance is formed, by escaping the gas in the mold to said plasma sprayed film. CONSTITUTION:One or more of a particulate substance selected from a metal particulate substance a metal particulate substance containing an inorg. metal compound and a particulate substance comprising an inorg. metal compound is plasma sprayed to the surface of a mold main body 1 to form a plasma sprayed film 2 having fine pores. As the metal particulate substance, a particulate material of Al, Ti, B, Cr or an alloy thereof is designated. The plasma sprayed film 2 is pref. formed to the entire surface of the mold main body 1 but can be partially formed thereto. When a rubber or plastic molding material 3 is supplied to the mold having the plasma sprayed film 2 formed thereto, the gas in the mold escape to the plasma sprayed film 2 to eliminate spew.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a spill-free rubber or plastic molded product and moldings 1 to 1 used in the method.

Conventionally, when manufacturing rubber molded products such as tires using molds, it was necessary to prevent the air inside the mold from escaping, so air holes were installed in the mold. Molded products using this type of mold had the problem that the moldings entered the air holes, causing spills.For this reason, when molding a molded product without spills, it was necessary to remove the air holes. It has been proposed to use a mold with a metal or non-metallic membrane that has air permeability placed on the perforated area, and to allow the air inside the mold to escape through the air hole to the outside through this air permeable membrane. However, this method works well when the pores in the breathable membrane become very small, causing poor appearance due to air pockets on the surface of the molded product, and conversely, when the pores in the breathable membrane become large, There is a problem that molding material such as rubber enters the I'L due to pressure during molding, causing a hole, which is not practical.

In view of the above circumstances, the inventors of the present invention have developed a method for manufacturing rubber or plastic molded products without spiffs on a large scale. As a result of the investigation, it was found that the surface of the U-rule 1 to the main body that the molding tool 4 comes into contact with contains metal powder particles, p+tt+geometric metal compounds, or inorganic metal compound powder. Can you create micropores in grains? When performing C molding using a mold with an EV rule coating, if there is no air pocket or pressurization (J molding of rubber q + 4 diagonal mesh), the spew will not get old. Isn't there?
We have found that a molded product with a good appearance (A≧1B) can be obtained, and that the object of the invention can be effectively achieved, leading to the present invention.

Therefore, the present invention provides a rubber or plastic molded
In a method of manufacturing a rubber or plastic molded product by supplying a metal powder into a mold, metal powder, metal oxide, metal nitride, metal carbide, metal (Metal powder containing inorganic metal compounds such as J oxides and metal borides,
and one or more types of powder particles selected from undefeated metal powder particles such as metal oxides, metal nitrides, metal carbides, metal silicides, metal borides, etc. to form a thermal spray coating having micropores. Use a mold to make the above molding rate into this mold (
When a molded product is manufactured by supplying this molding, air in the molding 1~ escapes to the thermal spray coating to obtain a molded product without spillage. How to manufacture molded products? It is something we offer.

In addition, inorganic metals such as metal particles, metal oxides, metal nitrides, metal carbides, metal nitrides, metal borides, etc. can be applied to the surface of the IJ of the present invention, rubber or plastic molding materials. One or two types selected from metal powder containing a compound, and metal oxides, total hollow oxides, metal carbides, metals (J oxides, metal borides, etc.) 15) Form a thermal sprayed coating having granular particles 1' and pores, and supply the molding material 1 to a mold to manufacture a molded product. A pair of rubber forks without spills (one pair of moldings for manufacturing niblastic molded products) is designed to allow the gas inside to escape to the thermally sprayed coating. There is.

According to the present invention, air pockets do not occur in the mold, there is no clogging of the molding material due to pressurization, and the appearance of the Spiyu four-cone rubber or plastic sack molded product is good. You will definitely get 1 wa. The molded product molded according to the present invention does not have any spills, so it is not only difficult to remove the spill after molding, but also the spill marks themselves can be removed from the molded product (11). They can also improve the appearance of molded products. The manufacturing method and mold of the present invention include Thailand\7,
B1 rubber, rubber flora-1: Can be effectively employed in the production of conveyor bells 1 to 1, tubes, flexible pipes, foamed rubber molded products, foamed PlusDeck molded products, PlusDeck molded products, etc.

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

As shown in FIGS. 1 to 5, the mold according to the present invention has a thermally sprayed coating layer 2 with fine pores formed on the surface of a mold body 1 covered with a rubber or plastic molding material. (In addition, 3 in the figure indicates the plastic molding mouth 1).

Here, this thermal sprayed II9 layer 2 is made of one or more types of powder and granules selected from metal powders, metal powders containing inorganic metal compounds, and inorganic metal compound powders. It is formed by melting. In this case, the metal powders include, for example, △l, 'T-i, B, C
r % S i 1W 1Co , N i , Zll, Y
etc., or) j) Powder and granules of these alloys can be mentioned. ,
Examples of the inorganic metal compound powder include oxides, nitrides, carbides, oxides, and borides of the metals mentioned above.

Specifically, the metal oxides include A1203, T!
02,B,+○i,CI',! O: I, S:
02, Vl/02 casting used, 11th metal nitride, LtAIN, r: N N S
' 3 N 4, Z l'
N, If N, VN, [a
N, [3+! ' 3 N 2 etc. can be used, gold) 1j3
Carbide Tltl-i C, Si C, WC, Zr
C, HfC.

VC, Ta C, N1) C1BiC7; used 1!1
, gold hjX I pu monster li 3i, Mo
31.7rS:,\/Si, etc. use 1! - Metal borides include A113, Ti B2, Si B, WB, and W.
B 2, Z l'' B 2, -r il' l-3 Snow is used, (!t l.Furthermore, the metal powder containing the inorganic metal compound is, for example, the metal powder kimono mentioned in -1- and inorganic metal compounds.

The inside of the mouth (゛) is preferably used because it tends to be porous.

Although the powder diameter of the above-mentioned powder is not necessarily limited, it is preferable to have an average particle size of 1 to 100 microns, particularly 5 to 20 microns, in order to achieve the object of the present invention.

In addition, there are particular restrictions on the method of thermal spraying crushed powder particles (
However, if the actual temperature is 2,000 yen, we will adopt any method that can spray powder particles, such as a method using combustible gas or a method using J5 Smaarc.
Treatment at a culm degree of 6000'C is most preferred in order to achieve the objectives of the present invention.

The mold water Iho 1 (Δ
Is it preferable to form it on the entire contact surface?
Depending on the case, it can also be formed partially only at the necessary locations '/e'. In any case, this "hanging stand" is constructed as shown in FIGS. 2 to 5, with vents passing through the main body 11 and the exterior surfaces 1) and 1) that come into contact with the molding material, fl,
It is necessary to form a hot cover II (J IPI 2) so as to cover this vent hole 4, or to avoid causing a spill (').

The coating layer 2 can also be formed on the surface of the roll body 1, but as shown in FIGS. It is also possible to form a thermally sprayed coating 11γ12 on the metal body 1, especially when forming a non-coated IJJ coating 11γ12. It is preferable to provide 'i 2 a. As such an intermediate Fj42 a (for example, l, fNi, AI
, IVIo, Cr-free metals, or alloys of these? 011?1 is mentioned, and the Ni-Al alloy thin layer has a high effect of increasing adhesion and is preferably used. This middle! l? + 2 a (7) The thickness of the intermediate layer 2a is not limited to 1" h (y) and may also be formed by (J welding). Also, there is no limit to the thickness 2\ of the intermediate layer 2a, and it may be 0.1
Even if the layer is as thin as ρ, it will affect the effectiveness of the adhesive-retaining layer. In addition, it is preferable that the middle part 128G is one that improves air permeability. In particular, as shown in FIG. It is essential that the intermediate layer 2a has ventilation 111.

The mold of the present invention in which the thermal spray coating layer 2 is formed on the mold body 1 described above is used, and a lifting platform for molding a desired molded product by supplying rubber or plastic molding material into the mold is used. - Gas such as air in the thermal sprayed coating layer 3 escapes to the thermal sprayed coating layer 3, resulting in a molded product with a good appearance and no scratches. As the particles are piled up on the mold surface in a shape, many fine pores are generated between the particles. The gas is trapped in minute pores in the sprayed coating layer 3.

In this case, these pores are not compatible with the culm, which is clogged by the intrusion of molded materials such as rubber, and these pores (although they are finer, !i! layer 3 is t-
Since it is formed over a wide area on the surface of each tree,
The gas trapped in the pores of the thermally sprayed coating layer 3 (as described above) quickly diffuses throughout the entire layer, and a molded product with no air pockets, an outer diameter 112 that is extremely 1ρ, and no subication is obtained. It is something that can be done.

Therefore, in this way, the gas in the mold is trapped in the thermal spray coating 11ψ layer 3 and diffused, so that the gas in the mold 1 is transferred into this spray coating H3 as
In other words, it is possible to mold a molded product with a good appearance. This is because it eliminates the need to cut out the ventilation holes.

As shown in Fig. 1, if no ventilation holes are formed in the mold body 1, there will be gas existing between the mold body 1 and the molded product (on the molded side). In order to ensure that the coating care 2 is completely coated, the coating layer 2 should be adjusted to a certain culm thickness (η, specifically 0, 1).
It is preferable to cover nv+j and fi by 0.3 mm or more. In this case, the thickness is preferably 12 mm, 1 S, etc., although it is not necessarily limited to 12 mm.

The mold of the present invention has a mold [・water body 1] as shown in FIG.
It is also possible not to form a ventilation layer in the pores 4, or it is possible to form the ventilation holes 4 as shown in FIG. 2 to 1 between eyes
Since the wrapped gas is sifted through the ventilation hole 4 and published in one copy, the air inside the mold can be removed smoothly and the air inside the mold can be removed from the mold. 1 (If it is possible to do it, IIl,...
The J value of the spray coating layer 2 can be expressed as 1i<1i, for example, it is possible to achieve the object of the present invention in 1 min even with J9 of 0,05+ll+n.

)) b The diameter of the open vent hole 4 is not limited to '14j M, or it is 9f that it is 1~2 mm from the point of IJ0. If the diameter of the vent hole 4 is relatively large, the air-permeable reinforcing layer 5 for reinforcing the sprayed coating layer 3 should be placed between the vent hole 4 and the sprayed coating layer 2 during pressurization during molding. It is preferable to insert a breathable reinforcing material 6 into the vent hole 4 (FIG. 3.4) or to insert a breathable reinforcing material 6 into the vent hole 4 (FIG. 5). This one
In some cases, the breathable reinforcing layer 5 may be made of gold 1i1S or a nonmetallic sintered body (Fig. 3), a metal or nonmetallic plate with through holes 7 (Fig. 4), etc. The breathable reinforcing material τ can be made of fibers such as asbestos (Fig. It doesn't matter if it's a coarse grain.

As explained above, in the present invention, the gas in the C1 hole I is used in this bath to form a thermally sprayed coating layer with fine pores formed on the surface of the metal body. 41 hits +1! I! Layer 1~Shitsufu'b, l wide 1) Shishi-C('d 1.'i Sarukoto/J';-7(,3,'44r (ko@pj) Ventilation holes on the underside of the coating layer ] In the case of IJ coating 11 ) 1 - wrapped / ζζ spirit) There is no air trapped in the roof, and there is no clogging or damage to the thermal sprayed coating layer, resulting in a clean and smooth exterior. Molded products without J- are &I
C Really disappointed Shino 1° or less, Real/I [1419! However, the present invention is not limited to the basic example of the book.

Example 9' Shown in Figure 36! , :like, 25 x 90 x
/lnv: V1・J-(diameter 70 in the lower mold 8 with
1nl, 2mm deep counterbore hole 9 for air 1~lap (this step ('J, lower mold surface) 1, 1, -1 type 10, frill pup's 1! 98 to this 1τ and above<s:r
Using the 1-ru 1- consisting of 10, add J and Unino l\ to the regular 1 +, and form Ilr t'r'i.

As a result, all of the 20 molded products had good appearance, and no damage to the surface IM1 due to air pockets was observed.

For comparison, it is used! i! 7- which does not form a layer
As a result of conducting a similar experiment using a molded comb molded product, it was found that 17 scratches on the surface caused by air pockets were observed on the back of 20 com vulcanized molded products. I might have to ask 11 times to make sure it's a good product.

[Brief explanation of the drawing]

Figure 1 is a side view of PJ potato, Figure 5 is a side view of Example 4 of the mold of the present invention - Hole partially omitted, and Figure 6 is a side view of the mold of the present invention.
Part of the root used in the experiment
8 [This is a side view. 1...Mold body, 2...Thermal spray coating layer, 3...Molding material o'81.4...Vent holes, 5...Illll tough reinforcement layer...Breathable reinforcement! If If (!person Arides 1 ~ Ntai 1) Stock agent Patent attorney Takashi Kojima Tono 1, matter 1! 1 display 11r1 Japanese 558 year special Mftfi No. 061985 No. 2
, name of the invention Go 11 without sub-Y+- or made of plastic molded product j
Notification method and mold used in the method 3, n+1iif
1J Relationship with the Ministry Case Special Edition 1 Ministry of Representatives Hattori Kuni M1 4 Agent 〒104 5), Amended ``FiY'In'' 4 explanation of the invention, Column 1 and ``Simplified explanation of the drawings - Column 1 and drawings, l'+Q, Otsu? 5 6. Contents of amendment (1> ``Rubber roller'' on page 6, line 4 of the specification has been changed to 1 rubber. Crawler-1 and revision 1E-4. (2) No. 61iQ, line 14 r] [...shown). ”
Next, 1. The present defense mold is applicable as an upper mold for molding, a mold for foam molding, a mold for press molding, etc., and the mold of the present invention (A is not particularly limited). , 1'' is inserted 1゜〈3) Same line 12 @ line 18 [...No problem. ”, the legal text is inserted 1゜ “Here, in the present invention, the thermal sprayed coating layer (!-) formed on the mountain air-resistant reinforcing layer is arranged in the vent hole formation location. .Figure 7 shows this.[
- Recesses] 1 communicating with the ventilation holes 4 are formed at the required locations on the surface of the main body 1, as shown in FIG. J: A reinforcing body 5'-t with a thermally sprayed coating layer 2 is buried therein.
161 layer 2 (formed only in the S1 recess 11) can be formed, and the other parts of the surface of the mold body 1 can be formed. Even if the L melting coating layer is not formed, a molded product without spills can be obtained in the same way. be able to. In addition, as shown in Fig. 8, sintered bodies etc.
: The -F side and side surface of the reinforcing body 5' are heated +1! i
! It is not possible to bury something covered with layer 2. The materials forming the thermal spray coating layer 2 shown in FIG. 7.8 are the metal powders and metal oxides mentioned above. Metal particles containing inorganic metal compounds such as metal nitrides, metal carbides, metal silicides, and metal borides; and inorganic metal compounds such as metal oxides, metal nitrides, metal carbides, metal silicides, and metal borides. One or more types of powders and granules selected from metal powders and granules are preferably used, and furthermore, nylon, epoxy resin, polybutene, ethylene-ffil M vinyl copolymer, and ethylene-vinyl acetate tF'8 polymer are used. Powders of one or more synthetic resins such as partially saponified products, polyoxybenzony 1 to polyoxybenzony, and polyester-norroethylene can also be suitably used. Is it a rubber or plastic molded product that does not cause spills even if a copper coating layer is formed? (FIGS. 9 and 10 show the formation of the plastic layer 2', and the state is not shown).Here, the C1 reinforcing body 5
When forming a sintered body such as a metal, it is preferable to use a sintered body material such as a metal with an average particle size of b to 100μ, especially 10 to 50μ, and +1! i!
The layer 2 or the plastic layer 2' is preferably formed using a material having an average particle diameter of 1 to 100 II, particularly 5 to 20 μm, and a j9 of 1 to 100 μm, particularly 10 to 50 μm. Furthermore, as shown in Figure 11,
A thermally sprayed coating layer 2 is formed on the reinforcing body 5', and a plastic layer 2' is further formed on the reinforcing body 5', and this is buried in the recess 11.
It is also possible to mold a molded product without spills. Note that the reinforcement body 5' and the thermal spray coating layer 2
Alternatively, the above-mentioned intermediate layer can be interposed between the plastic layer 2'. ] (4) Page 14, line 14 [Cross section 1 @ l Next to J [, Figures 7 to 11 each do not show other embodiments of the mold of the present invention and are partially omitted cross sections. Insert a figure. (5) Supplement figures 7 to 11 as shown in the attached sheet. Written amendment to the procedure by Yutaka (self-imposed June 5, 1980) Kazuo Wakasugi, Director General of the Special Ff Agency, 1. Indication of the case 1982 I: Special Application No. 61985 2, Name of the invention Subi 2- 3.7 Relationship with the Municipal Commissioner Case Patent Applicant (J Address: 1-10-1 Kyobashi, Chuo-ku, Tokyo Name (527)) Representative of Briaston Co., Ltd.
Kunio Hattori 6, Contents of amendment (1) l1lJall, page 8, lines 3 to 5
j-th [1 to 100μ, . . . preferred. ], it is preferable to carry out the present invention in order to achieve the present invention.
” he corrected. (2> Lines 9 to 11 of page 8 of the same document [Can be adopted, but it is preferable.'' Yes, correct it as j. (3) On page 9, line 14, replace ro and 1J with "5".
I am corrected. (4) Same No. 111jm11th line IJr0.3Jdoduru (
1) is corrected as ro, ogo31. (5) On page 12, line 3, replace ro, 05J with “0.
．． Corrected to 03J. (6) 1M411J February 59 248 +f
llj lj (7) ”P h'c ?ili f
4th page, lines 8 to 9, lines 1" [forming material and l), average particle size 1 to 100μ, Rk: 5-120μ+n I
The particle size is 1-200μ, especially 5μ as the forming material.
〜120μ」1, or more

Claims (1)

[Claims] 1. Δ3 to a method of supplying a rubber or plastic molding material into a funnel and manufacturing a rubber or plastic molded product.
Then, as the mold, the surface of the mold body with which the molding material comes into contact is coated with metal powder, metal oxide, metal nitride, gold carbide, metal () oxide, or metal boride.
1C ((containing metal compounds) → -metal powders, and inorganic metal powders such as metal oxides, metal nitrides, metal carbides, metals (J oxides, gold oxides, etc.) Using a mold in which a dissolvable coating having micropores of one or more types of powder particles selected from the above is formed, the molding material is fed into this L-ru 11' to form a molded product. A method for producing a spill-free rubber or plastic molded product, characterized in that when assembling, the gas in the heel 1 does not escape into the M copper coating, thereby producing a spill-free molded product. 2. Metal powder containing inorganic metal compounds such as metal particles, metal oxides, metal nitrides, metal carbides, metal silicides, and metal borides on the surface of the mold body that comes into contact with the rubber or PlusDeck molding material. Granules, and one or more types of powder particles selected from metal oxides, metal nitrides, metal carbides, and inorganic metal powder particles such as metal bride and metal borides have micropores. Thermal spraying 'IJ' means that when a film is formed and the molding material is supplied to the mold to produce a molded product, the gas in the mold is prevented from escaping into the melted part. A mold for manufacturing rubber or plastic molded products without spills.