JPH0737049B2 - Manufacturing method of synthetic resin molded product with stretchable woven fabric stretched and manufacturing apparatus used for the method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a synthetic resin molded product in which a woven fabric that stretches in one direction is stretched, and a manufacturing apparatus used for the manufacturing method. TECHNICAL FIELD The present invention relates to a method for manufacturing a synthetic resin molded product in which a woven fabric known as a functional fiber, which is stretchable only in one direction, is stretched at the time of molding and integrally welded to a synthetic resin frame body for injection molding, and a manufacturing apparatus used for the manufacturing method. .

(Prior Art) Conventionally, a woven fabric that expands and contracts only in one direction and does not expand and contract in a perpendicular direction [for example, Dymetrol (registered trademark of DuPont)] has been developed as a high-performance fiber, and is used for furniture and chairs of automobiles. Used for seats such as folding lightweight chairs. When attaching these stretchable woven fabrics to the seat frame, unlike ordinary woven fabrics, it is necessary to attach the stretchable woven fabrics in a stretched state to some extent. As a method for stretching the stretchable woven fabric, for example, the following method has been used.

That is, as shown in FIG. 12, a central opening is previously defined,
A rectangular metal frame 1 is formed in which adjacent frames 4 and 5 having a number of woven fabric locking needles 2 standing upright on the upper surface are movable via a fitting member 6 so that the adjacent frames 4 and 5 are spaced apart from each other. . The ends of the stretchable woven cloth 7 are locked to the locking needles 2 of the metallic frame according to the stretching direction, and then the frames 4 and 5 are pulled apart to extend the stretchable woven cloth 7 to give a predetermined tension. The frames 4 and 5 are fixed in the stretched state, and the stretched state of the woven fabric 7 is maintained.

Then, the separately formed metal or wooden seat component frame 8 is pressed against the stretched woven fabric 7 and the outer peripheral portion of the woven fabric 7 is fixed to form the seat base portion. The method for fixing the woven fabric 7 to the seat component frame 8 is the same as in the case of the conventional woven fabric, in which the outer peripheral portion of the woven fabric 7 is fixed to the seat component frame 8 by tacking or sewn. Was.

Then, a pad unit and a surface cover are provided on these seat basic parts to complete the seat unit.

(Problems to be Solved by the Invention) However, the method for manufacturing a seat basic component stretched with a stretchable woven fabric as described above has the following problems.

That is, when the metallic frame 1 in which the locking needles are erected is used to stretch the stretchable woven fabric, not only is it difficult to attach and stretch the woven fabric to the frame, the productivity is poor. It was also dangerous in terms of work. Further, the stretchable woven fabric must be fixed to the seat component frame in a stretched state, but it is difficult to fix the stretchable woven fabric in a state in which a predetermined tension is applied.

Furthermore, since the stretchable woven fabric is fixed in a stretched state at all times, if the rivets are fastened at the jumpy positions, the rivets will be cut or torn, or the part away from the iron will return to its original position. There's a problem.

On the other hand, in the case of integral molding with an injection molding machine, it is not only difficult to attach the stretchable woven fabric to the mold in a stretched state, but also the woven fabric is damaged due to the influence of resin heat, injection pressure, etc. , No satisfactory product was obtained. Therefore, conventionally, the one using the resin frame as the seat constituent frame has not been put into practical use.

The present invention has been made in view of the present situation, and is a synthetic resin molded product in which a woven fabric stretchable only in one direction is stretched, which eliminates the conventional defects, is excellent in workability, productivity, and safety. It is an object of the present invention to provide a manufacturing method of and a manufacturing apparatus used for the manufacturing method.

(Means for Solving the Problems) In order to achieve the above object, the present invention has the following configuration.

That is, it is a method of manufacturing a synthetic resin molded product in which a continuous rectangular frame is stretched with a woven fabric that can expand and contract only in one direction, and is characterized by the following steps.

(A) Clamping the stretchable woven cloth to the clamp mechanisms arranged on both sides of the movable side mold and attaching it to the surface of the mold, one clamp mechanism is moved horizontally to apply a certain tension to the stretchable woven cloth, (B) Next, the movable side mold and the fixed side mold are clamped and injection-molded, and at the same time, the stretchable woven cloth is integrally welded to the synthetic resin frame body, and (c) moved after cooling for a certain period of time. The clamp mechanism is returned to its original position, and (d) after that, the movable side mold is retracted, and at the same time, the clamp of the stretchable woven fabric is released by the clamp release mechanism provided in the fixed side mold, ) Remove the product from the mold.

The manufacturing apparatus used in the above manufacturing method includes a movable-side mold and a fixed-side mold, a clamp mechanism fixed to one side surface of the movable-side mold, and a horizontally movable clamp mechanism provided on the other side surface. On the other hand, the fixed side mold is characterized by being provided with a clamp releasing mechanism for releasing the clamp mechanism.

Further, the clamp mechanism may be configured by connecting the upper toggle device and the lower toggle device by a handle and a pressing rod.

In addition, it is preferable that a movable block is provided with a pressing block that moves integrally with a horizontally movable clamp mechanism, and the clamp releasing mechanism includes a releasing rod and a releasing protrusion that are pressed by the pressing block. .

Further, the clamp release mechanism can be configured by pins that can be retracted and provided on both side surfaces.

Embodiments Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 11 shows a seat base component 10 manufactured by the present invention.
Indicates. The basic component 10 is constructed by fixing a stretchable woven fabric 12 to the seat component frame 11. The seat component frame 11 is a rectangular resin frame formed by injection molding, and a stretchable woven fabric 12 is integrally fixed to the side surface and the upper surface. The stretchable woven fabric 12 is attached to the mold in advance, and is integrally fixed at the same time as the injection molding of the seat component frame 11.

The seat basic component 10 thus manufactured is covered with a pad and a surface cover to complete a seat unit.

First, the manufacturing apparatus 20 for the seat basic component 10 will be described.

The manufacturing apparatus 20 includes a movable mold 21 and a fixed mold 23,
The movable-side mold 21 and the fixed-side mold 23 are mounted on a mounting plate (not shown) as in the normal mold structure, and are connected by guide pins. A recess 25 and a recess 27 are formed on the abutting surfaces of both molds, and a molding cavity 29 is formed as shown in FIG.

Next, another configuration of the movable die 21 will be described.

A toggle clamp mechanism 30 and a toggle clamp mechanism 31 are provided on both side surfaces of the movable mold 21. The toggle clamp mechanism 30 includes a toggle device 33 provided at an upper position and a toggle device 33a provided at a lower position with a handle 37 and a pressing rod 3.
The toggle clamp mechanism 31 connects the toggle devices 35 and 35a, which are also provided at the upper and lower positions, with the handle 37a.
And a pressing rod 39a. The toggle devices 33, 33a and the toggle devices 35, 35a are symmetrically formed at diagonal positions.

The toggle devices 33 and 33a are configured as follows.

That is, the clamp plate 40 fixed to the side surface of the movable mold 21 is bent to the bent portions 45 of the pair of dogleg-shaped support portions 43 that are curved outward through the angle 41. A V-shaped lever 47 and a lever 47a which is curved outward and has an inward projection 49 are rotatably attached by a shaft 50, and the rear end of the link 53 is held by the front end 51. A shaft 55 is pivotally mounted on the shaft.

Further, the levers 47, 47a and the link 53 are connected by a pair of links 57, and the levers 47, 47a and the link 5 are connected.
A shaft 59 is rotatably mounted on the shaft 7, and a link 53 and a link 57 are rotatably mounted on a shaft 60.

As shown in FIG. 6, the toggle devices 33 and 33a according to the above configuration are different in that the levers 47 and 47a are attached upside down.
The tip portions 61 and 61a of the levers 47 and 47a of the cables 33 and 33a are respectively connected by the handle 37, and the tip portion of the link 53 is further held by a pressing rod 39 which holds the stretchable woven cloth between the clamp plate 40 and the clamp plate 40. It is configured by connecting.

In the toggle clamp mechanism 30 having the above-described configuration, when the handle 37 is rotated in the direction of the mold 21 in the state shown in FIG. 1, the levers 47, 47a of the toggle devices 33, 33a are rotated about the shaft 50 and, at the same time, are linked. 53 is pushed by the link 57 and rotates about the shaft 55,
The shafts 50, 59, 60 are aligned, and the pressing rod 39 and the clamp plate
And 40 (see FIGS. 1 and 2).

Next, while the toggle clamp mechanism 30 is fixed to the mold 21, the toggle clamp mechanism 31 is horizontally movable.

That is, the toggle clamp mechanism 31 is provided on the sliding plate 70 via the support plate 69 fixed to the tip of the rod 67 of the hydraulic cylinder 65 arranged on the back surface of the movable mold 21. Positioning pins 79 for restricting the moving distance of the sliding plate 70 are attached to the support plate 69.

More specifically, a clamp plate 71 is fixed to the sliding plate 70, and toggle devices 35 and 35a are provided on the clamp plate 71 via an angle 73. A toggle clamp mechanism 31 is configured by connecting a handle 37a and a pressing rod 39a to the toggle devices 35 and 35a, the toggle device 35 is configured to be a toggle device 33, and the toggle device 35a is configured to be symmetrical to the toggle device 33a. Therefore, the same components are designated by the same reference numerals, and the description thereof will be omitted (see FIG. 6).

A pressing block 75 is provided on the upper and lower parts of the moving side toggle clamp mechanism 31. That is, the rear end of the pressing block 75 is fixed to the sliding plate 70, and the abutting portion 77 is attached to the front end. The butting part 77
Is formed so as to come into contact with a releasing rod for releasing the clamped state of the fixed-side toggle clamp mechanism 30, which will be described later. Since the pressing block 75 is fixed to the sliding plate 70, it moves horizontally together with the toggle clamp mechanism 31 by the operation of the hydraulic cylinder 65.

Next, the configuration of the fixed-side die 23 will be described.

The fixed mold 23 is provided with a clamp releasing mechanism 82 including a releasing rod 81 and a releasing protrusion 85.

The releasing rod 81 is slidably inserted into the through holes 80 penetrating both side surfaces of the mold 23, is biased by the return spring 83, and is configured to always project to the moving side toggle clamp mechanism 31 side. ing. One end of the releasing rod 81 is in contact with the abutting portion 77 of the pressing block 75, and the other end is in contact with the inward protrusion 49 of the lever 47a that constitutes the fixed side toggle devices 33, 33a. ing. Therefore,
When the releasing rod 81 is projected to the opposite side against the return spring 83 by the pressing block 75, the toggle device 3
Push the inward projection 49 of the lever 47a of 3, 33a and press the lever 47a.
Rotate outward. At the same time, the link 53 is pulled by the link 57, so that the clamped state of the stretchable woven cloth by the pressing rod 39 and the clamp plate 40 is released.

Further, a releasing projection 85 of the toggle clamp mechanism 31 is provided on the protruding side surface of the releasing rod 81 of the fixed mold 23.
That is, the releasing projection 85 is provided so as to be located inside the inward projection 49 of the lever 47a of the moving side toggle clamp mechanism 31. Therefore, after the injection molding is completed, when the toggle clamp mechanism 31 returns to the original position and the movable side mold 21 opens, the inward projection 49 of the lever 47a engages with the release projection 85, and the lever 47a. Rotate outwards and at the same time link 5
Since 3 is pulled by the link 57, the clamped state of the stretchable woven cloth by the pressing rod 39a and the clamp plate 71 is released.

Next, a method of manufacturing the seat base portion 10 using the manufacturing apparatus 20 will be described.

As shown in FIG. 1, the movable mold 21 and the fixed mold 22 are open, and the toggle clamp mechanisms 30 and 31 are in an open state. In this state, the movable side mold 21 is stretchable woven fabric 12
Attach. Attachment of the stretchable woven fabric 12 is performed by clamping both side edges of the stretchable woven fabric 12 by the toggle clamp mechanisms 30 and 31.

In the clamp of the stretchable woven cloth 12, the handles 37, 37a are rotated in the direction of the mold 21 while pressing the stretchable woven cloth 12 of which both end edges protrude from the side edges of the mold 21 against the surface of the mold 21. And the levers 47 and 47a rotate about the shaft 50, and at the same time, the link 53 is pushed by the link 57 and rotates about the shaft 55.
The pressing rods 39, 39a come into contact with the clamp plate 40 and the clamp plate 71, and when the shafts 50, 59, 60 are aligned, the stretchable woven fabric 12 is most strongly held. The stretchable woven fabric 12 may be clamped by any of the toggle clamp mechanisms 30 and 31.

After the attachment of the stretchable woven fabric 12 is completed, the hydraulic cylinder 65 is operated to slide the sliding plate 70 outward, and the movable side toggle clamp mechanism 31 is horizontally moved. At this time, the second
As shown in the figure, the moving distance is regulated by the positioning pin 79, and a constant tension is always applied to the stretchable woven fabric 12.

Next, the movable side mold 21 is advanced toward the fixed side mold 23 to clamp the mold. When the mold is clamped, the cavity 25 for molding is formed by the recess 25 of the movable mold 21 and the recess 27 of the stationary mold 23, and the pressing block 75 faces the releasing rod 81 (see FIG. 3). reference).

In this state, when the synthetic resin is injected into the cavity 29 through the runner of the stationary mold 23, the molten resin is filled in the cavity 29 to form the seat frame 11, and at the same time the stretchable woven fabric 12 moves. It is pressed against the side mold 21 side and integrally welded to the seat component frame 11 while a certain tension is applied.

After that, after cooling for an appropriate time, the mold may be opened and the molded product may be taken out.

First, the hydraulic cylinder 65 is operated to move the sliding plate 70 to return the moving side toggle clamp mechanism 31 to the original position. When the sliding plate 70 is moved, the pressing block 75 presses the releasing rod 81, causing it to project to the opposite side against the return spring 83. When the release rod 81 projects to the opposite side, it hits the inward projection 49 of the lever 47a of the toggle device 33, 33a, so that the lever 47 is rotated outward and at the same time linked.
Since 53 is pulled by the link 57 and rotates about the shaft 55, the clamped state of the stretchable woven fabric 12 by the pressing rod 39 and the clamp plate 40 is released.

Next, when the movable mold 21 is retracted, the releasing projection 85 engages with the inside of the inward projection 49 of the lever 47a, so that the lever 47a is rotated outward as the movable mold 21 retracts. In this way, the stretchable woven fabric 1 by the pressing rod 39a and the clamp plate 71 is similar to the case of the toggle devices 33, 33a.
The clamped state of 2 is released (see Fig. 4).

Then, the molded product is taken out of the mold, trimmed from the boundary portion of the stretchable woven fabric 12 with the seat component frame 11 and finish-processed to obtain the seat basic component 10.

8 to 10 show a manufacturing apparatus 20A according to the second embodiment. This manufacturing apparatus 20A is the manufacturing apparatus 2 according to the first embodiment.
The configuration of the toggle clamp mechanisms 90 and 91 provided on the movable side mold 88 and the clamp release mechanism 92 provided on the fixed side mold 89 is different from the case of 0.

First, the fixed side toggle clamp mechanism 90 and the movable side toggle clamp mechanism 91 provided in the movable side mold 88 will be described.

The fixed side toggle clamp mechanism 90 and the movable side toggle clamp mechanism 91 have the same structure and are formed symmetrically, and the toggle device 93 provided at the upper position on the side surface of the movable side mold 88 is the same as in the first embodiment. And a toggle device 93a provided at a lower position is connected to the handle 95 by a pressing rod 97.

The toggle devices 93 and 93a are configured as follows.

That is, a linear lever 103 is rotatably attached by a shaft 105 to a central portion of an inner edge of a supporting portion 101 fixed to a clamp plate 99 fixed to a side surface of a movable mold 88 through an angle 100. A shaft 109 is rotatably attached to the outer edge of the support portion 101 so as to hold the rear end of the link 107. Further, the lever 103 and the link 107 are connected by a pair of links 110, and the lever 103 and the link 110 are connected.
Are pivotally attached by a shaft 111, and the links 107 and 110 are pivotally attached by a shaft 113, respectively.

Toggle clamp mechanisms 90 and 91 are formed by connecting the tip end portions of the levers 103 of the toggle devices 93 and 93a having the above-described configurations with the handle 95, and further by connecting the link 107 with the pressing rod 97 that abuts on the clamp plate 99. Composed. Link 107
The tip end portion 108 of the is protruded from the side surface of the pressing rod 97, and is configured to engage with a clamp release mechanism described later.

Since the toggle clamp mechanisms 90 and 91 are configured as described above, when the handle 95 is rotated in the direction of the mold 88, the levers 103 of the toggle devices 93 and 93a rotate about the shaft 105, and at the same time, they are linked. When 107 is pushed by the links 110 and 110a to rotate about the shaft 109 and the shafts 105, 113 and 111 are aligned, the pressing rod 9
7 and the clamp plate 99 are joined (see FIG. 8).

Also in this embodiment, the toggle clamp mechanism 91 is horizontally movable. That is, the sliding plate 123 is attached through the support plate 121 fixed to the tip of the rod 120 of the hydraulic cylinder 119 arranged on the back surface of the movable mold 88,
A clamp plate 99a is fixed to the sliding plate 123, and toggle devices 93, 93a are provided on the clamp plate 99a via an angle 100a.

Next, the structure of the fixed-side die 89 will be described.

A pin 129 that engages with the tip end portion 108 of the link 107 of the toggle device 93, 93a is embedded in both end surfaces of the fixed-side mold 89 so as to be retractable.

That is, the pin 129 is completely depressed when pressed, but the tip end surface formed on the inclined surface faces the movable mold 88 and is projected outward by the return spring. After the injection molding is completed, the pin 129 is provided so as to be located inside the tip end portion 108 of the link 107 when the hydraulic cylinder 119 is operated to return the moving side toggle clamp mechanism 91 to the original position. . Therefore, when the movable side mold 88 is retracted and the mold is opened, the tip 108 of the link 107 is released by the releasing pin 12.
9, the levers 103 and 103a are rotated outward, and at the same time, the link 107 is pulled by the link 110, so that the clamped state of the stretchable woven cloth by the pressing rod 97 and the clamp plates 99 and 99a is released. To be done.

In this embodiment, compared with the first embodiment, the toggle clamp mechanism and the clamp release mechanism can be simplified.

Next, a method of manufacturing the seat basic component 10 by the manufacturing apparatus 20A will be described.

First, the movable side mold 88 and the fixed side mold 89 are opened, the toggle clamp mechanisms 90 and 91 are opened, and the stretchable woven fabric 12 is attached to the movable side mold 88. Attaching the stretchable woven fabric 12
This is done by clamping both side edges of the stretchable woven fabric 12 by the toggle clamp mechanisms 90 and 91. Since the operation of the toggle clamp mechanism has already been described, detailed description is omitted for simplification.

After installation of the stretchable woven fabric 12 by the clamp is completed, as described with reference to FIG.
119 is actuated to slide the sliding plate 123 outward to horizontally move the movable-side toggle clamp mechanism 91 and apply a constant tension to the stretchable woven fabric 12.

Next, the movable side mold 88 is advanced, and the fixed side mold 89 is butted against and clamped, and the synthetic resin is injection molded into the cavity through the runner of the fixed side mold 89. Then, after cooling for an appropriate time, as shown in FIG.
Is operated to return the moving side toggle clamp mechanism 91 to the original position.

Further, when the movable side mold 88 is retracted, the tip end portion 108 of the link 107 is engaged with the releasing pin 129. Therefore, as the movable side mold 88 retracts, the lever 103 is rotated outward, and the pressing rod 1
The clamped state of the stretchable woven fabric 12 by 17 and the clamp plates 99 and 99a is released (see FIG. 9).

Finally, the molded product is taken out of the mold, trimmed from the boundary portion of the stretchable woven fabric 12 with the seat component frame 11 and subjected to finish processing to obtain the seat base component 10.

The toggle clamp mechanism is not limited to the above embodiment, and the clamp mechanism for holding the stretchable woven fabric is not limited to the toggle clamp mechanism, but can be changed to another clamp mechanism.

Also, the clamp releasing mechanism may be appropriately changed according to the change of the clamp mechanism.

Furthermore, by adding a means for preventing slippage to the surfaces of the pressing rod and the clamp plate of the toggle device, the stretchable woven fabric can be held more reliably.

(Effects of the Invention) Since the present invention has the above-described configuration, the following excellent effects can be achieved.

(1) Since the stretchable woven fabric is only held by the clamp mechanism, it can be easily attached to the mold, the work efficiency is improved, and the work can be performed safely.

(2) Since the stretchable woven fabric is automatically stretched by the driving device, a sufficient amount of stretching can be given and the tension can be kept constant.

(3) Since the clamped state of the stretchable woven fabric is released at the same time when the mold is opened after the injection molding, the product can be taken out smoothly without destroying it.

(4) Since the stretchable woven fabric is injection-molded with a certain tension applied, a product integrally welded at the same time as molding can be obtained.

(5) Since the stretchable woven fabric is integrally welded to the frame during injection molding, the stretchable woven fabric does not break or break as in the case of the conventional tacking, and the durability is remarkably improved.

[Brief description of drawings]

Fig. 1 is a cross-sectional view of the mold before the stretchable woven cloth is attached, Fig. 2 is a cross-sectional view of the stretchable woven fabric attached and tensioned, and Fig. 3 is the mold clamped state. Sectional view, FIG. 4 is a sectional view showing a part of unclamping, FIG. 5 is a side view of the state of FIG. 1, FIG. 6 is a front view of the movable side mold in FIG. 2, and FIG. An enlarged top perspective view showing a part of the toggle clamp mechanism, FIGS. 8 to 10 show a second embodiment, FIG. 8 is a sectional view of a mold clamping state, and FIG. 9 is a state of releasing the clamp when the mold is opened. 10 is an enlarged top perspective view showing a part of the toggle clamp mechanism, FIG. 11 is an explanatory perspective view in which a part of the seat base component is cut away, and FIG. 12 is a conventional perspective view. It is an explanatory perspective view showing a manufacturing method. 20, 20a is a manufacturing device, 21 is a movable mold, 23 is a fixed mold, 30, 31 is a toggle clamp mechanism, 33, 33a, 35, 35a is a toggle device, 37, 37a is a handle, 39, 39a is Pressure rod, 40
Is a clamp plate, 41 is an angle, 65 is a hydraulic cylinder,
70 is a sliding plate, 71 is a clamp plate, 73 is an angle, 75 is a pressing block, 81 is a releasing rod, 82 is a clamp releasing mechanism, 85 is a releasing protrusion, 88 is a movable side mold, and 89 is fixed. Side molds, 90 and 91 are toggle clamp mechanisms, 92 is a clamp release mechanism, 93 and 93a are toggle devices, 95 is a handle, 97 is a pushing rod, 119 is a hydraulic cylinder, 123 is a sliding plate, and 125 is a clamping plate. , 129 is a release pin,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hirotoshi Asano No. 1 Nozawa, Kaisei-cho, Ashigarashie-gun, Kanagawa Prefecture Meiji Rubber Kasei Kanagawa factory (72) Inventor Shunji Ichikawa No. 1 Nobuzawa, Kaisei-cho, Ashigagami-gun, Kanagawa Meiji Co., Ltd. Rubber Chemicals Kanagawa Factory

Claims (6)

[Claims] 1. A method of manufacturing a synthetic resin molded product, comprising a continuous rectangular frame and a woven fabric stretchable only in one direction, which comprises a clamp mechanism disposed on both sides of a movable mold. The stretchable woven fabric is clamped and attached to the mold surface, one clamp mechanism is moved horizontally to apply a certain tension to the stretchable woven fabric, and then the movable side mold and the fixed side mold are clamped. Injection molding, and at the same time, the stretchable woven cloth is integrally welded to the synthetic resin frame, and after cooling for a certain period of time, the moved clamp mechanism is returned to the original position, and then the movable side mold is retracted. At the same time, a method of manufacturing a synthetic resin molded product in which a stretchable woven fabric is stretched is characterized in that the clamp of a stretchable woven fabric is released by a clamp release mechanism provided on the fixed side mold, and the product is taken out of the mold. 2. A movable side die and a fixed side die, wherein a clamp mechanism fixed to one side surface of the movable side die and a horizontally movable clamp mechanism are provided on the other side surface, while a fixed side die is provided. A mold is provided with a clamp releasing mechanism for releasing the clamp mechanism, and an apparatus for manufacturing a synthetic resin molded product in which a stretchable woven fabric is stretched. 3. The synthetic resin molded product stretched with a stretchable woven fabric according to claim 2, wherein the clamp mechanism is formed by connecting an upper toggle device and a lower toggle device with a handle and a pressing rod. Manufacturing equipment. 4. A synthetic resin molding in which a stretchable woven fabric is stretched according to claim 2 or 3, wherein a movable block is provided with a pressing block that moves integrally with a horizontally movable clamp mechanism. Product manufacturing equipment. 5. The stretchable woven fabric according to claim 2, wherein the clamp releasing mechanism comprises a releasing rod pressed by a pressing block provided on the movable mold and a releasing projection. Equipment for manufacturing synthetic resin moldings. 6. The apparatus for manufacturing a synthetic resin molded product stretched with a stretchable woven fabric according to claim 2, wherein the clamp releasing mechanism is composed of pins which can be retracted and provided on both side surfaces.