JPS62144911A - Manufacture of molded material with engaging member - Google Patents

Abstract

PURPOSE:To arrange securely the engaging member in the grooves of mold by placing the primary engaging components in the groove or concave of mold in such a way as the face having hooking parts facing to the mold surface and engaging with the secondary engaging members and then guiding the molding raw material into the mold to form up a molded material. CONSTITUTION:Secondary engaging members 4 are placed in the groove 2 of the mold 1 in such a way that the faces having hooking parts and looping parts facing above, and fixed firmly to the mold 1 with the adhesive coated on the bottom face of groove beforehand. Next, the faces of hooking parts 5 of a primary engaging member 6 are placed in the grooves 2 of molding tool in such a way that said faces contact the mold surface and engaged with the faces of the secondary engaging member 4. Raw liquid of polyurethane foaming material is injected into the molding tool and covered with the top cover in the normal temperature for 20min. After that, the same is uncovered and the foaming material 11 is taken out after 15min. The skin material having a number of fiber looping materials on its back face is covered over the said foaming material 11 and pressed down, and the hooking parts of the engaging member and the looping parts of the skin material are engaged with to fix the skin material on the molded material.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for manufacturing various synthetic resin molded bodies such as cushions, and more specifically to a method for manufacturing molded bodies in which an engaging member having a hook-and-loop fastener is integrally joined. Regarding the manufacturing method.

(Prior Art) Hook-and-loop fasteners are widely used as engaging members for joining fiber fabrics and other various articles. One example is one in which an engaging member is integrally joined to a seat cushion made of foamed synthetic resin for the purpose of covering and fixing a skin material to the seat cushion. Methods for joining the engaging member to the surface of the molded body such as the seat cushion include a method of attaching the engaging member to the surface of the molded body with an adhesive as disclosed in Japanese Utility Model Application No. 57-20257, 57-12947
As in Publication No. 2, a needle is implanted on the surface of the mold and the engaging member is inserted into the needle and fixed in the groove of the mold, or a fixing member having a T-shaped cross section is fitted into the groove. There is a method of fixing the part to the mold surface. Furthermore, JP-A-60-179003 discloses a method in which a thin metal sheet is held within the engaging member, and a magnet is provided at the bottom of the groove of the mold to fix the engaging member within the groove using magnetic attraction force. There is.

(Problems to be Solved by the Invention) In the above two known techniques, the durability is poor when sticking with an adhesive, and the work is troublesome when sticking with a mold needle, and the position of the engaging member cannot be adjusted. There is a problem that it is difficult to make adjustments. On the other hand, the method of fixing the engaging member using magnetic attraction force is excellent because it does not have the above problems, but it has the problem that the manufacturing cost increases when using magnets or metal sheets. There is.

As a result of studying these problems, the present inventors found that by making the structure of the mold special, the engaging member can be reliably placed in the groove of the mold, and it can be integrated with the molded object. Invented a molding method for joining.

(Means for Solving the Problems) That is, the present invention is capable of accommodating a first engaging member having a hook body! Using a mold having a groove or a recess and a second engaging member having both a hook body and a loop body on the bottom surface of the groove or recess, press the first engagement member with the surface having the hook body in contact with the hood surface. A molded body with an engaging member, characterized in that the engaging member is accommodated in the groove or recess of the mold and engaged with the second engaging member, and then a molding raw material is introduced indoors to mold the molded body. It is a manufacturing method.

The first engagement member used in the present invention is a member that is integrally joined to the molded body, and the surface of the molded body is coated with a skin material such as fiber cloth and is engaged with the engagement member. It is desirable that the first engagement member is provided with a hook body.

The engaging member having a hook body may be of any type used as a hook-and-loop fastener, such as a hook-shaped hook-and-loop fastener made of synthetic fiber filaments such as nylon or polyester woven into a hook shape, or a mushroom-shaped hook-and-loop fastener instead of a hook body. This includes a mushroom-shaped hook-and-loop fastener in which a mating element is woven, and a hook-and-loop fastener in which the hook body or mushroom-shaped engagement element is integrally molded from synthetic resin instead of being woven. Although these hook-and-loop fasteners are essential elements of the first engaging member in the present invention, various members can be added in addition to the hook-and-loop fastener depending on the purpose. For example, on the back side of the hook-and-loop fastener, that is, the side that does not have an engaging element, a fiber base fabric (coarse woven fabric, non-woven fabric, etc.) with gaps that can be impregnated with synthetic resin or locking material is used to strengthen the bonding with the molded object. Base fabrics or molded bodies having protrusions for this purpose can be laminated. It is effective to use these base fabrics in combination with a hook-and-loop fastener obtained by a molding method.

In the present invention, as a method for installing the first engaging member having such a structure in a mold, the engaging member is accommodated in a special groove or recess provided in the mold. The grooves or recesses can be formed by cutting the surface of the mold, or by forming a bank-like frame on the reduced surface. In either configuration, since the depth of the groove or recess is not large, the position cannot be fixed simply by housing the engaging member in the groove or recess, and the engaging member may shift from the groove or recess when the raw material for the molded body is supplied. It will come and go.

In the present invention, a second engaging member is provided on the bottom surface of the groove or recess, and the first engaging member is locked to the second engaging member to fix the position of the first engaging member. Since the second engaging member is simply provided on the bottom of the groove or recess, there is no need to use conventional magnets or metal plates, or to insert fixation needles each time, resulting in excellent efficiency and reduced manufacturing costs. The reduction is huge.

The second engaging member used in the present invention must have a loop body in order to engage with the hook body of the first engaging member.

As the loop body, a ring made of thin multi-filament strands, a long haired fiber, etc. that can be engaged with the hook body can be used. However, when an engaging member consisting only of these loop bodies is used as a second engaging member, the engaging force is very strong, and various other problems arise. First, when attaching and detaching the first and second engaging members in order to adjust the position of the first engaging member locked in the groove or recess, if the engaging force is strong, it will take unnecessary force and time to reduce efficiency. decrease. Also, when the molded body is removed from the mold after molding, if the engagement force is strong,
The bond between the molded body and the first engaging member is destroyed, and the desired molded body with the engaging member cannot be obtained. Furthermore, since the second engaging member consisting only of the loop body has a soft surface with the loop body, when the raw material for the molded body is supplied with the first engaging member locked, the weight of the raw material and the forming Due to the pressure of the body forming reaction, etc., the first engaging member is pressed toward the second engaging member, and the molded body bulges only in the area of the engaging member, so that the molded body has a predetermined shape. You will not be able to obtain it.

In order to solve the above problems, the second engaging member provided in the groove or recess needs to have a hook body as well as a loop body. The hook body here is a hook-like engagement element similar to the first engagement member, and is also an element made of a single fiber that is more rigid than the fibers that constitute the loop body or an element that is a rigid single fiber. It includes an element formed into a loop shape.

These hook bodies have a function of supporting the first engagement member without substantially contributing to the engagement of the first engagement member with the hook body. By having both a loop body and a hook body, the amount of the loop body can be reduced, and the engagement force with the first engaging member can be adjusted to an appropriate size. It is possible to suppress the bulge of the engaging member.

The arrangement of the loop body and hook body in the second engagement member is as follows:
Various types can be used as required, but from the viewpoint of ease of manufacture, one in which loop bodies and hook bodies are provided in rows in the length direction is preferred. A specific example is one in which a loop body is provided at the center of the second engagement member and hook bodies are provided at both ends, and this structure allows easy attachment and detachment from the first engagement member. It has certain characteristics. Another specific example is one in which a hook body is provided at the center of the second engagement member and loop bodies are provided at both ends. The engagement at the peripheral edge of the mating member becomes tight, and the first engaging member sufficiently seals the edge of the groove or recess, so the raw material for the molded body flows into the groove or recess, and the engaging member It is possible to prevent the engagement element from being buried.

Like the first engaging member, the second engaging member can be constructed by weaving organic synthetic fibers, by weaving metal fibers, or by integrally molding synthetic resin.

For example, the second engaging member used in the present invention can be made by the weaving method disclosed in Japanese Patent Publication No. 44-5569.

The second engaging member is placed on the bottom surface of the groove or recess with the surface having both the loop body and the hook body as the upper surface, and is fixed with the back surface in contact with the mold surface using a well-known method such as adhesive. If an engagement member made of metal fiber is used, its durability can be improved.

The above-mentioned second engaging member is placed in the groove or recess, and using a mold, the first engaging member is overlapped and locked onto the second engaging member. As a result, the position of the first engaging member to be joined to the molded body is set. The position and number of holes or recesses in the mold are designed depending on the purpose.

The molded material raw materials introduced into the mold are polyurethane, polystyrene, polyvinyl chloride, polyolefin, polyester, polyamide, synthetic rubber, etc., and are in liquid,
It can be introduced into the mold in the form of granules, powder, etc. A molded body is manufactured by foaming, curing, or solidification reaction in a mold, and at this time, the I-th engagement member is integrally joined to the molded body. After the molded body and the first engaging member are sufficiently joined,
Take out the molded body. Molded object and I! If the bonding with the first engagement member is insufficient, the engagement force between the first and second engagement members will exceed and the molded body and the first engagement member will be separated. The obtained molded body is integrally joined to the first engaging member, and seven hooks are exposed on the surface thereof.

The present invention will be explained below with reference to the drawings.

Figures 1 and 2 are perspective views showing examples of molds used in the present invention. Figure 1 shows a structure in which a groove 2 is bored in the bottom of the mold l, and Figure 2 shows a frame 3 in the bottom. A structure in which a concave portion 2 is provided is shown. 3 and 4, a second engaging member 4 is installed on the bottom surface of the groove 2 and recess 2' of the mold shown in FIG. 1 and FIG. 2, respectively, and a hook body 5 is installed on the upper surface of the second engaging member 4. FIG. 4 is a cross-sectional view taken along line x-x′ showing the relationship in which the first engaging member 6 is engaged. FIG. 5 is a plan view showing an example of the second engaging member used in the present invention, and FIGS. 6 and 7 are sectional views taken along Y-Y' of the second engaging member. The second engaging member has a central portion 7 and both end portions 8.8' in the width direction, and the example shown in FIG. It has a hook body 10 made of fiber, and as shown in FIG. 7, it has a loop body 9 in the center and a single f
This figure shows a structure having a hook body 10' made of fl fibers. 7
. , 10'. Note that the rows of hook bodies and loop bodies may be freely provided in a plurality of rows depending on the width of the second engaging member.

FIG. 8 is a sectional view showing an example of a molded body obtained by the method of the present invention, in which the first engagement member 6 is integrally joined to the surface of the foam molded body 110, and the surface of the engagement member is The hook body 5 is exposed.

(Effect of the invention) Since the obtained molded product has hook bodies on its surface,
It can be used for towing by engaging with a member having a loop body that engages with a hook body. As one specific example, when an engaging member having a hook body is bonded to a polyurethane foam and the foam is covered with a skin material having a nonwoven fabric, a raised back surface, or a loop-shaped fiber, the skin material is strengthened by the engaging member. Bonded cushions and chairs can be manufactured.

Other examples include a dress-up doll, a human mannequin, and a removable interior panel.

Example 1 A fastener member in which a nonwoven fabric made of polyester fibers was laminated on the back side of a hook-and-loop fastener (Magic Tape (registered trademark) manufactured by Rare Co., Ltd.) and its periphery was ultrasonically welded was attached to the first fastener member. Prepared as a joining part. Separately, a second engaging member having both a loop body and a hook body was prepared, in which loop bodies were provided at both ends relative to the width of the base fabric, and a hook body made of nylon monofilament was provided in the center. Place the second engaging member in the groove of the mold shown in Figure 1 with the surface with the hook body and loop body facing upward, and attach it to the molding die using adhesive applied to the bottom of the groove in advance. Firmly fixed. Subsequently, the surface of the hook body of the first engaging member was accommodated in the groove of the mold with the surface of the hook in contact with the mold surface, and was engaged with the surface of the second engaging member. Since the second engaging member had loop bodies at both ends, the first engaging member could be arranged so as to well seal the periphery of the groove. Next, 100 parts by weight of polyether (Polyether G-3000B manufactured by Adeka Co., Ltd.) (hereinafter simply referred to as parts), 0.15 parts of a catalyst (DABCO, manufactured by Sankyo Air Products Co., Ltd.), and a dispersant (L-540, Japan) were then added to a mixing tank. (manufactured by Unicar Co., Ltd.), 10 parts of dichloromethane as a blowing agent, and 3 parts of water were added and mixed.

Furthermore, catalyst T-9 (M8T Ch@mtcal Co
, manufactured by) 025 copies (T-9/G-3000B=25/75
After adding and mixing a solution of tolylene diisocyanate 40
and stirred at 20° C. for 10 seconds to prepare a polyurethane foam stock solution. The above polyurethane foam stock solution was poured into a mold, the top lid was placed on the mold, the mold was left at room temperature for 20 minutes, the top lid was removed, and after another 15 minutes, 9 foam molded bodies were taken out.

The engagement member on the molded body is in place and the first
The engaging member did not shift or come off. Furthermore, since the engagement was released with an appropriate force when the molded body was released from the mold, the bond between the molded body and the first engaging member was not destroyed.

Since the first engaging member well sealed the peripheral edge of the groove, the foam stock solution did not flow into the groove and fill the hook body of the first engaging member. When this foam molded body is covered with a skin material having a large number of fiber loop bodies on the back side and pressed, the hook body of the engaging member and the loop body of the skin material engage, and the skin material is fixed onto the molded body. It could be used as a cushion.

Even when the peeling engagement between the skin material and the molded body was repeated, the engaging member did not peel off from the molded body.

Example 2 Unsaturated polyester (Rivolac 2004W.

A stock solution of a molded body was prepared using as main ingredients a catalyst (manufactured by Showa Kobunshi Co., Ltd.) and a catalyst (ξ-MEC N) manufactured by Showa Kobunshi Co., Ltd.).

An engaging member similar to that in Example 1 was attached to the groove of a mold for flat plate molding, and the stock solution for the molded body was injected into the mold. 45-50
After a 2-hour curing reaction at °C, the entire mold was placed in water to cool, and the plate-shaped molded product was taken out. Since the first engaging member well sealed the peripheral edge of the groove, it was possible to prevent the stock solution from flowing into the groove. A polyester molded plate was obtained in which the back surface of the first engaging member was embedded and joined integrally with the molded body, and the hook body was exposed on the back surface.

When the polyester molded board is glued to a concrete wall so that the engaging member is exposed on the surface, and a fiber cloth with a brushed back side is placed on the polyester cedar board and pressed, the hook body and the cloth engage and are attached to the molded board. The cross was easily scored 9. The molded plate could be used as a cross-removable interior panel.

[Brief explanation of drawings]

FIGS. 1 and 2 are perspective views showing examples of the amount of molding used in the present invention, and FIGS. 3 and 4 are cross-sectional views taken along x-x' showing the state in which the engaging member is attached to the molded product. It is a diagram. FIG. 5 is a plan view showing an example of the second engagement member, and FIGS. 6 and 7 are cross-sectional views taken along Y-Y' in FIG. 5. FIG. 8 is a sectional view showing an example of the molded product obtained.

Claims (1)

[Claims] Using a mold having a groove or a recess in which a first engagement member having a hook body is to be accommodated, and a second engagement member having both a hook body and a loop body on the bottom surface of the groove or recess, the hook is formed. The first engaging member is accommodated in the groove or recess of the mold with the surface thereof in contact with the mold surface and engaged with the second engaging member, and then the molded body raw material is introduced into the mold and molded. A method for producing a molded body with an engaging member, characterized by molding the body.