JPH0478085B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing various synthetic resin molded articles such as cushions, and more specifically to a molded article in which an engaging member having a hook-and-loop fastener is integrally joined. Relating to a manufacturing method.

(Prior Art) Surface 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. As a method for joining the engaging member to the surface of the molded body such as the seat cushion, the
There are methods in which the engaging member is attached to the surface of the molded body using an adhesive as in Japanese Patent No. 20257, and needles are implanted in the surface of the mold and the engaging member is pierced into the needle as in Japanese Utility Model Application Publication No. 57-129472. There is a method of fixing the engaging member to the mold surface by fixing it in the groove of the mold, or by fitting a fixing member having a substantially T-shaped cross section into the groove. In addition, JP-A-1986-
No. 179003 and above disclose a method in which a thin metal sheet is held within the engaging member, a magnet is provided at the bottom of the groove of the mold, and the engaging member is fixed in the groove by magnetic attraction. In the above-mentioned two known techniques, there are problems in that sticking with an adhesive is inferior in durability, and the method of piercing with a mold needle is cumbersome, and it is difficult to adjust the position of the engaging member. In contrast, the method of fixing the engaging member using magnetic attractive force is superior because it does not have the above problems, but
There is a problem in that the use of magnets and metal sheets increases manufacturing costs.

As a result of studying these problems, the present inventors have devised a method for reliably arranging an engaging member within a groove of a mold and integrally joining the molded object without using any special member. was successful.

(Means for Solving the Problems) That is, the present invention provides a protruding body that has a groove or a recess in which an engaging member is to be accommodated, and that locks one or more engaging members to the edge of the groove or recess. Using a mold with a mold, the engaging member is accommodated in the groove or recess of the mold with the surface with the engaging element in contact with the mold surface, and then a molding raw material is introduced into the mold to mold a molded object. This is a method for manufacturing a molded body with a featured engagement member.

Various types of hook-and-loop fasteners known as hook-and-loop fasteners can be used as the engaging member used in the present invention, and hook-like hook-like fasteners made of synthetic fiber filaments such as nylon and polyester are woven into a hook shape, and instead of hook-like engagement elements. A mushroom-shaped surface fastener in which a mushroom-shaped engagement element is woven, and the hook-shaped engagement element or the mushroom-shaped engagement element is integrally molded from a synthetic resin instead of being woven in a woven structure. Furthermore, a woven or non-woven fabric made of a large number of fiber loops that engage with the hook-shaped or mushroom-shaped engagement element can also be used as a hook-and-loop fastener. These hook-shaped bodies, mushroom-shaped bodies, fiber loop bodies, etc. are all used as engaging elements.

Although these surface fasteners are essential elements of the engaging member in the present invention, various members can be added in addition to the surface fasteners depending on the purpose. For example, on the back surface of the hook-and-loop fastener, that is, the surface 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 a synthetic resin to strengthen the bonding with the molded object, or a locking material. Base fabrics or molded bodies having protrusions for this purpose can be laminated. These base fabrics and the like are effective when used in combination with a hook-and-loop fastener obtained by a molding method.

Furthermore, when the engaging member is installed in the mold and the molded body raw material is supplied, the raw material may fill the engaging element of the hook-and-loop fastener and impair the engaging function.To prevent this, the engaging element is covered. It is also possible to overlap a thin film like this on top of the hook-and-loop fastener and join the peripheral edge to the hook-and-loop fastener.

As a method for installing such an engaging member in a mold,
In the present invention, the engaging member is housed in a groove or a recess provided in the mold. The groove or recess can be formed by carving the surface of the mold, or by forming a bank-like frame on the surface. In either configuration, the depth of the groove or recess is not large, so simply housing the engaging member in the groove or recess will not stabilize the position, and it will shift or come off during molding, so ensure the position is fixed. must be made into something. To this end, the present invention provides one or more protrusions on the edge of the groove or recess to lock the engagement member and prevent it from escaping from the groove or recess. It was unexpected that the goal could be achieved with such a simple configuration, and it could be replaced with more complex methods such as using the attraction force of a magnet or providing a needle in the mold as in the conventional technology. The practical advantages are enormous. An example will be explained with reference to the drawings.

Figure 1 shows a rectangular groove 2 cut on the surface of a mold 1.
and has two protrusions 4, 5, 4'5' on opposite edges 3, 3', respectively. The shape of this protrusion can be made into any number of shapes as required. After molding, when the molded product integrated with the engaging member is taken out of the mold, it is desirable that the engaging member can be smoothly removed from the groove, and for this purpose, the protruding body should be not too large and have a shape with many curved surfaces. Something is desirable. The number of protrusions can be any number greater than or equal to one.

In FIG. 2, a frame 6 is provided on the mold surface 1 to form a recess 2', and needle-like protrusions 7 are provided at three locations. An embodiment using a needle-like protrusion is particularly suitable for removing the engagement member. Of course, it is also possible to use various combinations of the configurations of the embodiments shown in the figures.

The engaging member must be placed in the mold with the surface with the engaging element in contact with the mold surface. This is because the engagement member is integrally joined to the molded body on its back surface, and cannot perform its engagement function unless the engagement element is exposed on the surface. After housing the engaging member in the mold,
The raw material for the molded body is introduced into the mold. The molded products are of various types such as polyurethane, polystyrene, polyvinyl chloride, polyolefin, synthetic rubber, etc.
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 engagement member is integrally joined to the molded body. Next, when the molded body is removed from the mold,
A product in which the engaging member is integrally embedded and joined to the molded body is obtained.

3A to 3D are cross-sectional views showing the steps of the manufacturing method of the present invention, where FIG. 3A shows the engagement member 8 fixed in the mold 1, and FIG. Figure c shows a state in which the raw material 9 is introduced, figure c shows a state in which the mold is covered with a lid 10 and a molded body 11 is formed, and figure d shows a state in which the engaging member 8 is joined to the surface of the molded body 11 obtained. Indicates the current state.

(Function) Since the obtained molded body has a hook-shaped or mushroom-shaped engagement element or a loop-shaped engagement element on its surface, it can be engaged with a member having another engagement element that engages with the element. It can be used for various purposes.

As one specific example, when an engagement member having a hook-like engagement element is bonded to a polyurethane foam and the foam is covered with a skin material having a raised back surface or loop-shaped fibers, the skin material is bonded to the polyurethane foam. It is possible to manufacture cushions and chairs with strongly bonded parts.
Other examples include dress-up dolls, mannequin bodies,
It can also be used as a cross-removable interior panel.

The present invention will be explained below with reference to Examples.

Example 1 A fastener member was prepared by laminating a nonwoven fabric made of polyester fiber on the back side of a surface fastener (Magic Tape (registered trademark) manufactured by Kuraray Co., Ltd.) having a large number of hook elements, and ultrasonically welding the periphery of the nonwoven fabric. This fastener is placed in a groove on the bottom of the mold shown in FIG. 1, with the hook and loop fastener facing the mold surface.
The fastener member was locked and fixed by the protruding body provided at the edge of the groove.

Next, 100 parts by weight of polyether (polyether G-3000B manufactured by Adeka Co., Ltd.) (hereinafter simply referred to as parts) and a catalyst (manufactured by Sankyo Air Products Co., Ltd.) were added to a mixing tank.
DABCO) 0.15 parts, dispersant (Nippon Unicar Co., Ltd. L)
-540) 1.4 parts, 10 parts of dichloromethane (manufactured by Tokuyama Soda Co., Ltd.) as a blowing agent, and 3 parts of water were added and mixed, followed by a catalyst (T-9 solution manufactured by M8T Chemical Co.)
After adding and mixing 0.25 parts, add 40 parts of tolylene diisocyanate (TDI-80 manufactured by Mitsubishi Chemical Industries, Ltd.) and heat at 20°C.
The mixture was mixed 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, the mold was left to stand for an additional 5 minutes, and then the foamed molded product was taken out. In the obtained molded body, the engaging member was integrally joined to the molded body at a predetermined position with the hook element of the surface fastener exposed. When a skin material having a large number of fiber loops on the back surface was placed over the foam and pressed, the hook elements of the hook-and-loop fastener and the loops of the skin material engaged, and the skin material was fixed onto the foam. Further, even when the peeling engagement between the skin material and the foam was repeated, the engaging member did not peel off from the foam.

Example 2 A molding stock solution containing as main ingredients unsaturated polyester (Rigorak 2004W manufactured by Showa Kobunshi Co., Ltd.) and a catalyst (Parmeck N manufactured by Showa Kobunshi Co., Ltd.) was prepared, and the engaging member was fixed in the same manner as in Example 1. Pour into a mold for flat plate molding. After curing reaction at 45-50℃ for 2 hours,
The entire mold was placed in water and cooled, and the plate-shaped molded product was taken out. A polyester molded plate was obtained in which the back surface of the engaging member was embedded and joined integrally with the molded body, and the hook element was exposed on the surface.

When the polyester molded plate is adhered to a concrete wall with the engaging member exposed to the surface, and a fiber cloth is placed on the polyester molded plate and pressed, the hook element and the cloth engage and the cloth is easily placed on the molded plate. I was possessed. The molded plate could be used as a cross-removable interior panel.

[Brief explanation of drawings]

Figures 1 and 2 are perspective views showing examples of molds used in the present invention, and Figures a, b, c, and d in Figure 3 are cross-sectional views illustrating the steps of the manufacturing method of the present invention. be.

Claims (1)

[Claims] 1. Using a mold that has a groove or recess in which the engaging member is to be accommodated and a protrusion that locks one or more engaging members to the edge of the groove or recess, the surface with the engaging element is molded. 1. A method for manufacturing a molded article with an engaging member, comprising the steps of: accommodating the engaging member in the groove or recess of the mold in a direction in contact with the surface, and then introducing a molding raw material into the mold to mold the molded article.