JPH0911240A - Foam molding machine - Google Patents

Abstract

PURPOSE: To easily attach and detach the mold of a foam molding machine within a short time without using a tool. CONSTITUTION: In a foam molding machine, the clamp having the toggle mechanisms or cam mechanisms arranged to a moving frame 1 and a fixed frame 3 is used as the attaching tool of molds to the moving frame 1 and the fixed frame 3. The distance between the dog side parts arranged to both ends of the moving frame 1 and the fixed frame 3 to come into contact with or approaching the side parts of the molds 2, 4 is almost equal to the distance between the side parts of the molds 2, 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam molding machine capable of attaching and detaching a mold with one touch.

[0002]

2. Description of the Related Art Foam molded articles using foamed resins are widely used as spacers, cushion materials, heat insulating materials and the like. The foamed molded body is simply manufactured as follows. The fixed mold and the moving mold are matched, the pre-expanded beads are filled from the filler in the cavity formed between them, and then high-temperature steam is passed between the molds to foam the pre-expanded beads in the cavity. A molded body is produced, then cooling water is sprayed to cool the foamed molded body, and then the moving mold is moved to open the mold and take out the foamed molded body.

When manufacturing the foamed molded product of the next lot, the fixed mold attached to the fixed frame and the moving mold attached to the moving frame are replaced with each other and the same operation is performed.

[0004]

Conventionally, the work of attaching a die to a frame is performed by screwing the peripheral edge of the die to the frame at a predetermined interval using a large number of butterfly plate bolts and die retainers. It takes time and effort. Moreover, since it is difficult to adjust the mounting position of the mold, the positioning is performed using a mounting jig or a special tool. Therefore, there has been a demand for a foam molding machine capable of easily attaching and detaching a mold in a short time without using a tool.

[0005]

The foam molding machine of the present invention is installed on the movable frame (3) and the fixed frame (1) as an attachment to the movable frame (3) and the fixed frame (1) of the mold. It is characterized by using clamps (7), (8) having a toggle mechanism, a cam mechanism, or a screw mechanism.

[0006] The distance between the side portions of the clamp mounting portion which is in contact with or close to the side portions of the clamp die disposed on the periphery of the movable frame (3) and the fixed frame (1) is the die (4). ,
It is characterized in that it is almost equal to the distance between the sides of (2).

Furthermore, in these foam molding machines, the mold (2), (4) is brought into contact with the bottom of the mold (2), (4) at the bottom of the mold mounting surface of the frame (1), (3) for mounting the mold. It is characterized in that keys (10) and (11) for supporting 2) and (4) are provided.

[0008]

[Operation] Since the molds (2) and (4) are attached by the fixtures (7) and (8) equipped with the clamps having the toggle mechanism or the cam mechanism, it is not necessary to tighten the bolts to fix the molds. Installation and removal work can be done with one touch, making it extremely easy.

Further, the distance between the small-diameter portions of the dog (8c), which is a part of the fixtures (7) and (8) and is in contact with or close to both side surfaces of the die, is determined by the die (4), It is almost equal to the distance between the sides in (2). Therefore, the sides of the small-diameter portions of the dogs (8c) on both sides can be used as guides when inserting the molds (4) and (2). Furthermore, the die mounting position is the key provided on the frames (1) and (3).
Since it is determined by (10) and (11), no jig or tool is required for positioning the molds (4) and (2).

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to preferred embodiments. Since the moving dies (4) and the fixed dies (2) have the same attachment mechanism, the attachment of the moving dies (4) to the moving frame (3) will be described.

[Embodiment 1] FIG. 1 is a central sectional view of an essential part of a foam molding machine of the present invention.

In the figure, (3) is a moving frame, which is a moving die.
(4) is installed. (1) is a fixed frame,
Fixed mold (2) is installed. Reference numeral (5) is a cylinder mounting plate, and by moving the piston (9) having the moving frame (3) attached to the rod end, the movable mold (2) and the fixed mold (4) are opened or closed. The mold can be closed. (6) is a filler, which is a device for filling the pre-expanded beads in the cavity between the molds (2) and (4) which are closed. (7) is a clamp for mounting the fixed mold (2),
(8) is a clamp for mounting the moving mold (4).

FIG. 3 is a view showing the movable frame (3) to which the movable mold (4) is attached, as viewed from the fixed mold (2) side. The movable mold (4) is attached by being sandwiched by clamps (8) provided at four places. A mold grip (4a) for gripping the mold (4) when replacing the mold is provided on the upper part of the movable mold (4). A flange (4c) is provided around the moving mold (4), and the flange (4c) is provided with packing (4b) for maintaining airtightness with the fixed mold (2). . Further, a key groove (4d) that fits into the central key (10) of the moving frame (3) is provided in the center of the bottom of the moving die (4). The movable mold (4) is supported by the end keys (11) of the movable frame (3) near both ends of the bottom. (12) is the position where the clamp (7) of the fixed mold (2) approaches when the mold is closed, and the moving mold (4) is cut at the corresponding part to avoid contact with it. Missing.

FIG. 2 is a view showing a die mounting portion of the foam molding machine. The fixed frame (1) is fixedly attached to the frame (13). FIG. 4 is a view showing a state in which the fixed mold (2) and the movable mold (4) are combined and filled with the pre-expanded beads (14). still,
The molds (2) and (4) are provided with pores on the cavity forming surface for introducing steam for foaming the pre-expanded beads into the cavity.

FIG. 5 is a view showing a state where the movable die (4) is attached to the movable frame (3) by the clamp (8), and FIG. 6 is a sectional view thereof. Clamp with toggle mechanism
(8) is attached to the attachment plate (8d) of the clamp attachment portion (8e) provided at the upper and lower portions of both ends of the moving frame (3). Reference numeral (8a) denotes a handle portion of the clamp. When the handle portion is rotated in the tightening direction (counterclockwise direction in the figure) as shown in FIG. 5, it is integrally formed with the handle portion (8a) by the toggle mechanism and the handle portion (8a ), The position of the action portion (8b) formed at a right angle to the handle portion (8a) becomes far from the mounting plate (8d), and the dog (8c) is pulled toward the mounting plate (8d) side. Dog (8
Step c is formed by concentric cylinders with different diameters, and therefore a step is formed on the surface. Since the flange (4c) of the movable mold (4) is caught on this step, when the dock (8c) is pulled toward the mounting plate (8d), the mounting part
The moving frame (3) and the dock where the bottom of (8e) is welded
The flange (4c) of the moving mold (4) is clamped with the step of (8c),
The moving mold (4) is fixed to the moving frame (3).

The handle (8a) and the acting portion (8b) integral with the handle (8a) can rotate 180 ° about the rotation shaft (8f). The rotating shaft (8f) is located slightly beyond the center line by θ ° from the clamp center line, so when tightening the dog (8c)
Even if a force acts in the direction of loosening, the action portion (8b) tries to rotate in the direction of tightening the handle (8a), so that the tightened state is maintained.

FIG. 7 is a view showing a state in which the fixing by the fixing tool (8) is released so that the movable mold (4) can be removed, and FIG. 8 is a sectional view thereof. Further, FIG. 9 is a view of the fixture (8) viewed from below in this state. When replacing the moving mold (4), rotate the handle (8a) of the clamp in the releasing direction to move the dog (8c) to the flange (4c) of the moving mold as shown in Fig. 7.
Away from In this state, the flange (4c) of the moving mold (4) and the moving frame (3) are not clamped by the clamp (8), so if you hold the mold handle (4a) and pull it up, you can move the moving mold. (4) can be removed.

Then, another moving die (4) is inserted between the dog (8c) and the moving frame (3) from above. Moving mold
(4) is easily and straightly inserted by using the side surface of the narrow portion of the dock (8c) whose side surfaces are located on both sides as a guide. The key groove (4d) at the bottom of the moving die fits into the center key (10) of the moving frame (3), and the both ends of the bottom of the moving die abut the end keys (11). Then, when the handle (8a) of the clamp (8) is tightened, the flange (4
c) is sandwiched between the stepped portion of the dog (8c) and the moving frame (3), and the replacement is completed. Therefore, even without a special jig or tool, the mold mounting can be easily positioned by the side surface of the mounting part (8e), the center key (10), and the end key (11), and the toggle type clamp (8) ensures the positioning. The mold (4) can be easily replaced because it can be attached to.

The mounting of the movable mold (4) has been described above, but the mounting of the fixed mold (2) can also be easily carried out by the clamp (7) having the toggle mechanism and the dock (8c).
The side portion can be used as a guide, and the die can be easily positioned by a key without using a tool.

Example 2 A cam type clamp (15) was used in place of the toggle type clamp in Example 1. The mounting portion is shown in FIG. Even when the cam type clamp (15) is used, the dog (8c) is pulled by turning the handle in the same manner as in the first embodiment, and the dog (8c) is pulled between the stepped portion of the dock (8c) and the moving frame (3). The flange (4c) of the moving mold is clamped.

[Embodiment 3] Instead of the toggle clamp in Embodiment 1, a screw clamp (16) is used. The mounting portion is shown in FIG. Even when the screw type clamp (16) is used, the dog (8c) is pulled by turning the handle in the same manner as in the first embodiment, and the dog (8c) is pulled between the stepped portion and the moving frame (3). The flange (4c) of the moving mold is clamped.

[0022]

According to the present invention, it becomes possible to easily attach and detach the mold of the foam molding machine in a short time without using a tool.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a foam molding machine.

FIG. 2 is a view (side view) showing a die mounting portion of the foam molding machine.

FIG. 3 is a view (front view) showing a die mounting portion of the foam molding machine.

FIG. 4 is a diagram showing a state in which a foam resin is filled together with a mold.

FIG. 5 is a view showing a state in which a mold is attached to a frame with a clamp.

FIG. 6 is a view (cross-sectional view) showing a state in which a mold is attached to a frame by a clamp.

FIG. 7 is a view showing a state in which the attachment by the clamp is released.

FIG. 8 is a diagram (cross-sectional view) showing a state in which the attachment by the clamp is released.

FIG. 9 is an enlarged view (plan view) of a mounting portion with a clamp loosened.

FIG. 10 is a view showing a mounting portion using a cam type clamp.

FIG. 11 is a view showing a mounting portion using a screw type clamp.

[Description of symbols] (1) Fixed frame (2) Fixed mold (3) Moving frame (4) Moving mold (5) Cylinder mounting plate (6) Filler (7) Fixed mold mounting clamp (8) Moving Mold mounting clamp (8c) Dog (9) Piston (10) Center key (11) End key (12) Fixed mold mounting clamp Dock proximity (13) Stand (14) Foam molding (15) Cam Clamp (16) Screw Clamp

Claims (3)

[Claims] 1. A foam molding machine, wherein a clamp having a toggle mechanism or a cam mechanism or a screw mechanism installed on the movable frame and the fixed frame is used as a fixture for the movable frame and the fixed frame of the mold. 2. The distance between the dog sides of the clamps arranged on the periphery of the movable frame and the fixed frame, which are in contact with or close to the sides of the mold, is substantially equal to the distance between the sides of the mold. The foam molding machine according to claim 1. 3. The key according to claim 1 or 2, wherein a key for contacting the bottom of the mold and supporting the mold is provided at the lower part of the mold mounting surface of the frame for mounting the mold. Foam molding machine.