JPH0664825U - Locking member for mold-in processing - Google Patents

Abstract

(57) [Abstract] [Purpose] A mold that does not require preparation before molding or cleaning up after molding, and that can obtain a molded product with a hook-and-loop fastener tape mounted at a predetermined position. An in-process locking member is provided. [Structure] For the locking member for mold-in processing, a plastic in which metal powder having magnetism for magnets such as iron is mixed with both ends of the surface fastener tape 1 or a connecting sheet 6 integrated with the ears. Alternatively, a rubber sheet 3 is provided, and sealing members are provided at both ends of the surface fastener tape 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a locking member embedded in a cushion body such as an automobile seat or an office chair when the cushion body is molded.

[0002]

[Prior art]

 Conventionally, surface fasteners have been widely used as engaging members for various articles. In particular, in order to facilitate the attachment of a seat cover to an automobile seat, sofa, mat, etc., a surface fastener molded body in which a surface fastener is integrally molded by being embedded in a resin foam molding has attracted attention, and some proposals have already been made. ing. For example, JP-A-60-179003, JP-A-61-176390, JP-A-1-95012, JP-A-1-101116, JP-A1-163019, JP-A-63-115309, JP-A-63-115309. No. 115310, No. 63-11511, No. 64-43705, No. 4-59705.

When these technologies are roughly classified, the surface of the surface fastener in which the engaging elements are implanted is covered with a resin film or the like (this is referred to as a fastener cover film), and this is used as a recess of the molding die. The method is to install and then inject the stock solution of the foam, perform foam molding, take out from the molding die, and remove the film to expose the engaging element of the surface fastener integrally molded with the foam. A magnet is provided in the molding die to cover the engaging element of the surface fastener in order to mount the surface fastener on the molding die and to prevent the undiluted foam solution from flowing into the surface of the engaging element of the surface fastener. It is proposed to attach a thin metal tape (hereinafter referred to as steel paper) or rubber metal to the film part.

[0004]

[Problems to be solved by the device]

 In the above method, it is necessary to remove the fastener cover film after foam molding, and after removing the film, fine film scraps will inevitably remain on the engaging element surface, reducing the engaging force of the engaging element of the surface fastener. However, it did not look good in appearance, and it took a lot of time to completely remove this film scrap.

Further, in the above description, the steel paper and the rubber metal are bonded and integrated with the film so that they can be removed together when the film is removed. In this case, the work is the same as in the above case and the work efficiency is not good. In addition, in the above, if the steel paper is directly adhered to the hook-and-loop fastener, the steel paper remains on the hook-and-loop fastener even if the film is removed. It may come off and injure people seated on the seat cover or seat, and is not currently used.

Therefore, the present invention is to provide a molded body in which a surface fastener is mounted in a good condition without the need for cleaning after molding.

[0007]

[Means for Solving the Problems]

 The present invention relates to a plastic or rubber sheet containing magnetic metal powder and / or a metal compound in both ears of a surface fastener tape having a large number of engaging elements planted on the surface (this sheet is referred to in the present specification). We succeeded in solving the above-mentioned problems by using an engaging member having a structure provided with rubber metal or the same sheet) at the time of molding.

In the engaging member of the present invention, the rubber metal sheet is directly joined to both ears of the hook-and-loop fastener, and the both ears of the hook-and-loop fastener tape are connected through the connecting sheet such as non-woven fabric or woven cloth. The structure in which the section and the rubber metal sheet are combined increases the thickness of the rubber metal sheet in order to increase the magnetic cohesive force between the rubber metal sheet and the magnet in the molding die or the foam metal sheet. It is suitable when the locking member is bent into a U-shape and used to provide a surface fastener at the bottom of the deep groove.

The locking member of the present invention is provided with seal members at both ends of the surface fastener in order to prevent the undiluted foaming liquid from flowing in from the end of the surface fastener when mounted in the molding die. . As the seal member, a non-woven fabric, a woven fabric, or the like having an engaging function and having a constant length is pressed or ultrasonically welded. As the sheet member, a non-woven fabric, a woven fabric, a rubber metal sheet, a plastic, or a foam can be used. When attaching the sheet member to both ends of the surface fastener tape, the ultrasonic sealing method is performed by removing the engaging element with the engaging element at the end left or by grinding with a grinder. An adhesive method using an adhesive or a method of dropping a foaming liquid or the like and sealing with a foam can be used.

The surface fastener tape used in the locking member of the present invention has a large number of engaging elements, for example, hook-shaped, mushroom-shaped male engaging elements or loop-shaped female engaging elements on the surface. It may be a woven material made of synthetic fibers or a plastic molded body. Further, the surface fastener tape used for the engaging and locking member of the present invention has a large number of engaging elements on the front surface, and a surface provided with a large number of embedded elements on the back surface that are embedded and engaged in the molded body. Fasteners and tapes can also be used favorably. The embedded element is a synthetic fiber or synthetic resin woven or molded into a hook shape, an umbrella shape, a mushroom shape, or a loop shape. Further, a surface fastener tape having a large number of engaging elements on the surface and a tape having a large number of embedded elements on one side may be laminated back to back for use.

The plastic or rubber sheet (rubber metal sheet) containing magnetic metal powder or metal compound, which constitutes the locking member of the present invention, is made of plastic or rubber and metal powder such as iron powder. / Or a metal compound such as iron oxide is kneaded, and may or may not be magnetized. In addition, the rubber metal sheet must be attached to a magnet provided in the molding die for the foam, and must withstand the hot air and foaming pressure of polyurethane during the foaming process without impairing the sealing and setting properties. Absent. As an example of a rubber metal sheet, soft magnetic iron powder described in Japanese Utility Model Publication No. 4-59705, polyolefin, polyolefin elastomer, vinyl chloride resin polyamide, polyester, polyvinyl alcohol, polyurethane, synthetic rubber, silicone Examples thereof include blends with a binder resin such as a system resin or rubber. As described in Japanese Patent Application No. 2-188191, "Soft magnetic iron powder, flexural modulus at room temperature of 4000 kg / cm ² or less, tensile breaking strength of 300% or more, tensile strength of 20 kg / cm. ^A sheet composed of a thermoplastic resin having a melt flow rate of ² or more and a melt flow rate of 0.2 to 50 g / 10 min "can also be preferably used.

The rubber metal sheet has properties such as strong magnetic attraction to a magnet, flexibility, a flat surface, and good workability such as cutting and bonding. The length of the rubber metal sheet is the same as the length of the surface fastener tape, and the width thereof is in the range of 3.0 mm to 30.0 mm. The width is 3. If it is 0 mm or less, the mountability to the magnet in the molding die is not good, and the attachment of the surface fastener / tape to the ear is not good. Further, if the thickness is 30.0 mm or more, the cost becomes high, and there is little advantage by increasing the width further. A rubber metal sheet with a thickness in the range of 100μ to 3000μ is easy to use. If it is less than 100μ, the magnetism in the magnet in the mold is poor, and there is a risk of misalignment during the foaming process and urethane foam may flow in. If it exceeds 3000μ, the bending strength becomes large and it is difficult to handle, and the cost is high. There is no merit. To attach the rubber metal sheet to the ear of the hook-and-loop fastener tape, it can be attached with an adhesive such as a hot melt adhesive or a double-sided adhesive tape, or can be attached by sewing directly or through a connecting sheet.

[0013]

[Action]

 The locking member for mold-in processing having the above structure does not require any pre-treatment and is directly attracted to and fixed to the magnet provided in the mold, and then the foam is placed in the mold. Undiluted solution, for example, liquid polyurethane foaming undiluted solution, even if it is foamed, the locking member for mold-in processing does not deviate from the initial fixed position from the beginning, and the undiluted foaming solution is rubber metal of the locking member for molding-in processing. Also, the sealing member does not penetrate into the area where the engaging elements of the surface fastener tape are implanted. After the foaming process is completed, the molded product can be removed from the mold to obtain a product with a beautiful appearance. And the step of removing the cover film covering the engaging element unlike the conventional case is not required. Also, even if the rubber metal is left as it is in the molded body, it does not damage the seat cover or injure the human body. In this way, it is safer and simpler in working process than the conventional method of using steel paper together.

[0014]

【Example】

 FIG. 1 is a schematic view showing an embodiment of the present invention, in which a narrow rubber metal sheet 3 is attached to both ears of a surface fastener tape 1 having a plurality of engaging elements 2 on its surface. Further, it has a structure in which seal members 4 are provided at both ends (only one end is shown in FIG. 1) of the surface fastener tape. The cross section of the locking member of FIG. 1 taken along the line AA is as shown in FIG. 2, and the rubber metal sheet 3 is taken out from both ears of the hook-and-loop fastener tape 1 and laminated to the device. It shows the improved one.

FIG. 3 is a schematic cross-sectional view showing another example of the present invention. The surface fastener tape 1 used here has many engaging elements on the front surface and many embedded elements on the back surface. It has. A foam molded article is manufactured by setting a sheet made of polyurethane foam into a mold 7 for molding using the locking member having such a structure. This state is shown in FIG. 5, and a magnet 8 is provided at the position where the locking member provided on the bottom of the die 7 is set. By closely contacting the rubber metal sheet 3, the foam raw material liquid is prevented from entering from both ears of the surface fastener tape 1 of the locking member. Although not shown in FIG. 5, sealing members are provided at both ends of the surface fastener tape 1 as in FIG. 1 to prevent invasion of the undiluted foam solution. When the foamed stock solution is cured and foamed to form the foamed body 9, the locking member and the foamed body 9 are integrally molded and taken out from the molding die 7.

FIG. 4 is a schematic cross-sectional view showing another example of the present invention, in which a rubber metal sheet 3 is attached to both ears of a surface fastener tape via a connecting sheet 6. Have. The locking member having the structure of FIG. 4 is used by bending the locking member into a U-shape in the molding die 7 as shown in FIG. 6, and providing a deep groove in the foamed molded product, and the bottom of the groove. It is convenient for setting when a hook-and-loop fastener tape having an engaging element is to be provided. The shape of the sheet can be expressed more clearly because the skin can be pulled in to form a sheet.

[0017]

[Effect of device]

 As described above, the use of the locking member for mold-in processing of the present invention simplifies the foam molding process of the molded body and requires no process for removing the fastener / cover film as in the conventional method. In addition, since the scraps of the fastener cover film remain, the external appearance is not deteriorated due to the reduction of the engaging force of the engaging element of the surface fastener tape and the residual film scraps. Also, it is not necessary to clean up the removed fasteners and cover film scraps. Moreover, since steel paper is not used together, it does not damage the seat cover or injure the human body.

[Brief description of drawings]

FIG. 1 is a schematic view showing one example of a locking member for mold-in processing of the present invention.

FIG. 2 is a schematic cross-sectional view of the locking member for mold-in processing of FIG. 1 taken along line AA.

FIG. 3 is a schematic cross-sectional view showing another example of the locking member for mold-in processing of the present invention.

FIG. 4 is a schematic sectional view showing another example of the locking member for mold-in processing of the present invention.

5 is an explanatory diagram showing a state in which the locking member for mold-in processing shown in FIG. 3 is used to be integrated with a foam molded article.

FIG. 6 is an explanatory diagram showing a state in which the locking member for mold-in processing shown in FIG. 4 is used to be integrated with a foam molded article.

[Explanation of symbols]

 1 hook-and-loop fastener / tape 2 engaging element 3 rubber metal sheet 4 sealing member 5 embedding element 6 connecting sheet 7 molding die 8 magnet 9 foam

Claims (3)

[Scope of utility model registration request] 1. A plastic in which a metal powder and / or a metal compound having magnetism is mixed in both ears of a hook-and-loop fastener tape having a large number of engaging elements on its surface directly or in a connecting sheet integrated with the ears. Alternatively, a locking member for mold-in processing, characterized in that a rubber sheet is provided. 2. The locking member for mold-in processing according to claim 1, wherein seal members are provided at both ends of the surface fastener tape. 3. A surface fastener tape, wherein the surface fastener tape comprises a large number of engaging elements on the front surface thereof and a large number of embedded elements on the back surface thereof for embedding in a molded body and engaging therewith.
The locking member for mold-in processing according to claim 1 or 2, which is a tape.