JPH0531445B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing various synthetic resin molded articles such as cushions, and more particularly, to a method for manufacturing a molded article in which an engaging member having a hook-and-loop fastener is integrally joined. Regarding the 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 engaging a fixing member having a substantially T-shaped cross section in the groove. Furthermore, JP-A-60-
Publication No. 179003 discloses a method in which a thin metal sheet is held within an engaging member, a magnet is provided at the bottom of a mold groove, and the engaging member is fixed within the groove by magnetic attraction.

(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 in that it is difficult to make adjustments. In contrast, the method of fixing the engaging member using magnetic attraction is excellent because it does not have the above problems, but it has the problem that the manufacturing cost increases due to the use of magnets and metal sheets. .

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 has a groove or a recess in which a first engaging member having a hook body is to be accommodated, and a hook body and a loop body are combined on the bottom surface of the groove or recess. Using a mold having a second engaging member, the first engaging member is accommodated in the groove or recess of the mold with the surface having the hook body in contact with the mold surface, and the second engaging member is This is a method for manufacturing a molded body with an engaging member, which is characterized by locking the engaging member, and then introducing a molding raw material into a mold to mold the molded body.

The first engagement member used in the present invention is a member that is integrally joined to the molded body, and in order to cover the surface of the molded body with a skin material such as fiber cloth and engage 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 various types used as a hook-and-loop fastener, such as a hook-shaped hook-like fastener made of synthetic fiber filament such as nylon or polyester woven into a hook shape, or a mushroom-shaped engagement member instead of a hook body. These include mushroom-shaped surface fasteners in which the element is woven, and surface fasteners in which the hook body or the 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 a synthetic resin or a locking material may be 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 groove or recess can be formed by carving the mold surface or by creating a bank-like frame on the mold surface. In either configuration, the depth of the groove or recess is not large, so
Simply accommodating the engaging member in the groove or recess does not fix the position, and the engaging member may shift or come off from the groove or recess when the raw material for the molded body is supplied.

In the present invention, a second
An engaging member is provided, and the first engaging member is locked to the 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 a loop body, a ring made of thin multifilaments,
A material that engages with the hook body, such as long fibers, can be used. However, when an engaging member consisting only of these loop bodies is used as a second engaging member, various problems arise because the engaging force is very strong. First, when attaching and detaching the first and second engaging members in order to adjust the position of the first engaging member that has been neglected in the groove or recess, if the engaging force is strong, unnecessary force and time will be required, reducing efficiency. lower. Furthermore, when the molded body is removed from the mold after molding is completed, if the engagement force is strong, the bond between the molded body and the first engaging member will be broken, and the desired molded body with the engaging member will not be obtained. Something that doesn't exist happens. 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 The first engaging member is pressed toward the second engaging member due to the pressure of the body forming reaction, and the molded body bulges out only in the area of the engaging member, so that a predetermined shape is obtained. There will be no such thing.

In order to solve the above problems, it is necessary that the second engaging member provided in the groove or recess has 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 an element made of upright single fibers or a rigid single fiber that is more rigid than the fibers constituting the loop body. It includes an element formed into a loop shape.
These hook bodies have the function of supporting the first engaging member without substantially contributing to the engagement of the first engaging 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 member.

Various arrangements can be used for the arrangement of the loop body and the hook body in the second engagement member as required, but from the viewpoint of ease of manufacture, it is preferable to arrange the loop body and the hook body in a row 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 engaging member and loop bodies are provided at both ends.
The engagement member at the peripheral edge of the engagement member and the second engagement member are tightly engaged, and the first engagement member sufficiently seals the edge of the groove or the corresponding part, so that the raw material of the molded body is It is possible to prevent the liquid from flowing into the groove or recess and filling the engagement element of the engagement member.

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 weaving method used in the present invention is shown in Japanese Patent Publication No. 44-5569.
It is possible to make an engaging member of

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 the back surface is in contact with the mold surface and fixed by a known method such as adhesive. If an engagement member made of metal fiber is used, its durability can be improved.

Using a mold in which the above-described second engaging member is disposed in a groove or a recess, the first engaging member is overlapped and locked onto the second engaging member. This sets the position of the first engaging member to be joined to the molded body. The positions and number of grooves or recesses in the mold are variously designed depending on the purpose.

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

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

FIGS. 1 and 2 are perspective views showing examples of molds used in the present invention. FIG. 1 shows a structure in which a groove 2 is bored in the bottom of the mold 1, and FIG. A structure in which a concave portion 2' is provided is shown. Figures 3 and 4
The figure shows the groove 2 of the mold shown in Fig. 1 and Fig. 2, respectively.
FIG. 3 is a sectional view taken along line X-X′ showing a relationship in which a second engaging member 4 is installed on the bottom surface of the recess 2′, and a first engaging member 6 having a hook body 5 on the top surface 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 cross-sectional views of the second engaging member taken along Y-Y'. 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 fibers, and FIG. 7 shows a structure having a loop body in the center and hook bodies 10' made of single fibers at both ends. 7, 8,
If you provide space between each row of 8′ as necessary,
The loop body 8 and the hook body 5 of the first engaging member can be smoothly engaged without being hindered by the hook bodies 10, 10' of the second engaging member. Note that it is also possible to provide a plurality of rows of hook bodies and loop bodies 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 foamed molded body 11, and the surface of the engagement member is The hook body 5 is exposed.

(Effects of the Invention) Since the obtained molded body has a hook body on its surface, it can be used for various purposes by being engaged with a member having a loop body that engages with the hook body. As one specific example, when an engaging member with a hook body is bonded to a polyurethane foam and the foam is covered with a skin material having a non-woven fabric, a raised back surface, or looped fibers, 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 is laminated 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 its periphery is ultrasonically welded is prepared as the first engagement member. did. A second engaging member was prepared in which loop bodies were provided at both ends for the width of another base fabric, and a hook body made of nylon monofilament was provided in the center, using both the loop body and the hook body. Place the second engaging member in the groove of the mold shown in Figure 1 so that the surface with the hook body and loop body faces upward, and attach it to the mold using adhesive applied to the bottom of the groove in advance. Firmly fixed. Subsequently, the surface of the hook body of the first engagement member was placed 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 engagement member. Since the second engaging member has loop bodies at both ends, the first engaging member
The engaging member could be arranged so as to well seal the periphery of the groove. Next, 100 parts by weight (hereinafter simply referred to as "parts") of polyether (Polyether G-3000B manufactured by Adeka Co., Ltd.), 0.15 parts of a catalyst (DABCO, manufactured by Sankyo Air Products Co., Ltd.), and a dispersant (L-540, manufactured by Nippon Unicar Co., Ltd.) were then added to a mixing tank. ) 1.4 parts, dichloromethane as blowing agent
10 parts and 3 parts of water were added and mixed.

Additionally, catalyst T-9 (manufactured by M8T Chemical Co.)
After adding and mixing 0.25 parts (solution of T-9/G-3000B-25/75), 40 parts of tolylene diisocyanate was added and stirred for 10 seconds at 20°C to prepare a polyurethane foam stock solution. The above-mentioned 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 the foam molded product was taken out after being left for another 15 minutes. The engagement member on the molded body is in a predetermined position,
The first engagement member did not shift or come off during manufacturing. Further, when the molded body was removed from the mold, the engagement was released with an appropriate force, so that 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 A stock solution for a molded body was prepared using as main ingredients an unsaturated polyester (Rigolak 2004W, manufactured by Showa Kobunshi Co., Ltd.) and a catalyst (Parmek N, manufactured by the same company).

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. After a curing reaction at 45 to 50°C for 2 hours, the entire mold was placed in water and cooled, 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 plate is adhered to a concrete wall with the engaging member exposed on the surface, and a fiber cloth with a brushed back side is applied to the polyester molded plate and pressed, the hook body and the cloth engage and the cloth is placed on the molded plate. was easily installed. The molded plate could be used as a cross-removable interior panel.

[Brief explanation of drawings]

FIGS. 1 and 2 are perspective views showing an example of a mold used in the present invention, and FIGS. 3 and 4 are X-
It is a sectional view at X′. FIG. 5 is a plan view showing an example of the second engaging member, and FIGS.
The figure is a sectional view taken along YY' in FIG. FIG. 8 is a sectional view showing an example of the molded product obtained.

Claims (1)

[Claims] 1. Using a mold having a groove or recess in which a first engaging member having a hook body is to be accommodated, and having a second engaging member having both a hook body and a loop body on the bottom surface of the groove or recess, The first engaging member is accommodated in the groove or recess of the mold with the surface having the hook body 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. A method for producing a molded body with an engaging member, the method comprising molding a molded body.