JPH0543489B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for obtaining a cured plate by pressure forming an uncured plastic material such as slate material or pulp into a plate shape.

When a plastic material is pressure-molded between a receiving mold and a pressure mold to obtain a hardened molded plate of the plastic material, the molded plate comes into close contact with the pressing surface of the pressure mold due to compression by the pressure mold, so that after pressing It is difficult to separate from the pressurizing surface, and when an uneven pattern is applied to the molding surface at the same time as molding, it becomes even more troublesome to remove the press. It was also very troublesome to take out the pressure-formed plate that had been released from the mold after molding from between the pressure mold and the receiving mold.

The present invention solves the above-mentioned conventional disadvantages, namely, removing the press molded product from the pressure surface of the pressure mold after pressure molding, removing the press molded product after separating from the pressure surface, and removing the material before pressing. The purpose of this device is to make it extremely easy to transport the board, and in a device that obtains a hardened molded board by squeezing the material board between a receiving mold and a pressurizing mold, fluid pressure is applied to the back side, and when the material is sucked, A flexible membrane material is brought into close contact with the pressurizing surface of the pressurizing mold by negative pressure, and when fluid is pumped, it bulges from the pressurizing surface and separates the pressurizing plate.A flexible membrane material is polymerized along the pressurizing surface of the pressurizing mold, and the receiving mold is A movable mold plate is provided on the upper surface, and a number of transfer wheels of the movable mold plate are provided on the lower surface of the movable mold plate so that a portion of each can be projected upward and retracted from a slot provided on the upper surface of the receiving mold. It is characterized by

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

In the drawing, 1 is a fixed receiving mold, and 2 is a pressurizing mold installed to move up and down with respect to the receiving mold 1. In the illustrated example, both molds 1 and 2 are used to obtain a corrugated hardened plate. The opposite surface has a symmetrical waveform.

Concave grooves 1a were formed vertically and horizontally on the upper surface of the receiving mold 1 to drain water when a water-containing uncured plastic plate was press-formed as a raw material plate. Furthermore, a movable mold plate 3 made of a hard material such as a metal plate is superimposed on the upper surface of the receiving mold 1 so that it can be taken in and out.

That is, in the molding operation, the movable template 3 places the material plate a on its upper surface, charges it onto the receiving mold 1, polymerizes it, pressure-forms the material plate a with the pressure mold 2, and then press-forms the material plate a. When finished, the pressure-formed plate is placed on the upper surface and moved from the pressurizing work section to take out the pressure-formed plate, and the movable mold plate 3 is also provided with through holes 3a for drainage evenly distributed. did.

As shown in Fig. 1, shaft rods 5 are rotatably mounted at appropriate intervals in the length direction of the mold 1 between the frame rods 4, 4, which are provided on both sides of the mold 1 so as to be movable up and down. The upper parts of a plurality of rolling shafts 6 attached in the longitudinal direction of each shaft rod 5 can be made to emerge and retract from slots 7 provided in the receiving mold 1, respectively.

Note that the frame rods 4, 4 on both sides are always resiliently springs 4a.
The movable mold plate 3 is moved upwardly from the surface of the receiving mold 1, and in this case, the movable mold plate 3 is separated upward from the surface of the receiving mold 1.
The rotation of the wheels 6 allows the movable template 3 to be freely moved in and out of the pressurizing work section, and this operation allows the loading of the material plate a and the completion of the pressure forming process. The board is taken out.

In addition, during pressure molding, as the upper pressure mold 2 descends, the movable mold plate 3 is pressed against the surface of the receiving mold 1 against the spring 4a, and the movable mold plate 3 is moved by the close contact between the pressure mold 2, the movable mold plate 3, and the receiving mold 1. Pressure forming of the material plate a of the template 3 is performed.

The rotation of each wheel 6 is controlled by attaching a chain ring 8 to one end of each shaft rod 5 and attaching a chain 9 to the motor 1.
Driven by 0.

In the pressure forming operation, although not shown, a relatively small wire mesh is interposed between the movable template 3 and the material plate a to allow water contained in the material plate a to pass through during pressure forming. The fiber materials of the blank plate are captured by the wire mesh without being passed through, and the through holes 3a of the movable mold plate 3 and the grooves 1a of the receiving mold 1 can be prevented from being blocked by these fiber materials.

As mentioned above, the back surface of the molded plate a, which is pressure-formed between the receiving mold 1 and the second pressure mold, does not need to be particularly smooth, and the movable mold plate 3 having the through holes 3a or a wire mesh as described above may be interposed therebetween. Because it is molded to a relatively rough surface, it does not adhere closely to the mold surface and easily separates, but the surface molded by the pressure mold 2 requires a beautiful finish, so the mold surface must be particularly smooth. Due to the pressure applied on this surface, the surface of the molded plate is airtightly joined to the mold surface, and it is extremely difficult to release this from the mold. It is even more difficult to release the mold when the mold has unevenness, and the conventional methods for releasing the mold include manual methods such as peeling it off from the outside with a spatula, or gradually releasing the mold by blowing air from the edge with a nozzle. However, in the present invention, a flexible membrane material 1 such as rubber or synthetic resin is used on the mold surface of the pressurizing mold 2.
1 is polymerized, and its periphery is brought into close contact with the pressure mold 2 to form an airtight bond, and the flexible membrane material 11 is attached to the pressure mold 2.
Through holes 12 opening on the back surface of the flexible membrane material 11 are arranged in an appropriate distribution so that air, water, etc. can be pumped and sucked behind the flexible membrane material 11 at appropriate times. In the drawing, reference numeral 13 denotes a fluid introduction pipe, which communicates with the distributed through holes 12 through branch pipes 14, and each branch pipe 14 is provided with an on-off valve 15, respectively.

Next, the molding and mold release operations will be explained with reference to FIGS. 4 to 6.

As shown in FIG.
The flexible membrane material is placed on top of the mold and carried to a fixed position on the lower surface of the pressurizing mold 2, and the fluid flow path is made negative pressure by communicating the fluid introduction pipe 13 with a suction source using air, water, etc. 11 is brought into close contact with the mold surface of the pressurizing die 2 by suction, and when moving the pressurizing die 2 downward, move the movable template 3 on which the material plate a is placed onto the rollers 6 as shown in FIG.
At the same time, the material plate a is pressed down against the spring 4a, and the material plate a is pressure-formed between it and the receiving mold 1. In this case, the material containing water is squeezed out by the above-mentioned squeezing, and the water is removed through the hole 3a of the movable mold plate 3 and the groove 1a of the receiving mold 1, and the material plate a is compression molded and hardened. Get a board. After the molding operation is completed, as shown in FIG. 6, when the pressurizing mold 2 is moved upward and separated, the fluid is pumped into the fluid flow path at the same time as shown in FIG. Due to the fluid pressure generated, the membrane material 11 bulges and deforms and takes on a shape different from the surface shape of the molded material plate a, which partially lowers the pressure on the material plate, thus causing the membrane material 11 and the material plate a to come into close contact with each other. The relationship collapses, and the material plate a and the movable mold plate 3 are released from the pressure mold 2 due to their own weight, and are supported on the roller 6 protruding from the receiving mold 1 surface by the spring 4a, and the pressure mold 2 is It moves upward and returns to the state shown in FIG. 4, and the movable mold plate 3 and the pressure-forming plate on its upper surface are carried out from the bottom surface of the pressure mold 2 by the rotation of the rolling wheels 6 caused by the activation of the motor 10, and a new material plate is formed. a
It is introduced so that the next molding operation can be performed in exchange for the following.

When the contact area between the raw material plate a and the flexible membrane material 11 is large during mold release by the bulging deformation portion 11a of the flexible membrane material 11, it is necessary to overcome the degree of adhesion and release the mold. In the operation of restoring the bulging deformation part 11a along the mold surface of the pressurizing mold 2 by suction of the working fluid at the time of mold release in order to prepare for the next operation after the mold operation, which may cause unsmooth mold operation, When the area to be restored is large, incorrect folds may occur depending on the shape of the pressure mold surface, and especially when the mold surface is flat and has a wide bulging deformation part 11a, irregular folds often occur. If such folds occur, there is a problem that the next molding process may result in a defective product with irregularities on the surface of the product. In order to eliminate this, if the flexible membrane material 11 is placed in advance on the pressurizing mold 2 at a suitable location and a bonding part 16 is formed partially with an adhesive or the like, it is possible to form a bonding part 16 with an adhesive or the like, as shown in FIGS. 6 and 7.
Even in the molding operation of a wide planar plate as shown in the figure, the membrane material 11 bulges in a small area without expanding greatly during mold release, so that the mold release is performed smoothly, and also when the membrane material 11 is restored by suction. It can be correctly aligned with the mold surface without causing improper folds. Of course, such means for providing the adhesive portion 16 is not necessarily required when molding in a small area.

Furthermore, during mold release, the flexible membrane material 11 is molded along the entire mold surface of the pressure mold 2, as shown in FIG. Although they are stacked and used for pressure molding, molding and mold release can be performed smoothly even if the bulging deformation parts 11a are provided locally (four locations are shown in the illustrated example, but the number can be increased or decreased as desired). It will be done.

As described above, according to the present invention, a flexible membrane material is closely attached to the periphery of the mold surface of the pressurizing mold to polymerize, and fluid can be pumped or sucked to the back surface of the mold, and the fluid can be suctioned during the molding operation. Negative pressure is applied to the back side of the membrane material, and the material plate is pressure-molded between the receiving molds while the membrane material is brought into close contact with the mold surface by suction pressure, and when the mold is released after pressure molding, fluid is applied to the back side of the membrane material. The membrane material is bulged and deformed in relation to the surface shape of the pressure-formed plate by pressure-feeding, making mold release extremely smooth and easy.
A movable mold plate is stacked on the upper surface of the receiving mold, and the material plate before molding is supported on the upper surface of the movable mold plate, and furthermore, the movable mold plate can be made to protrude and retract from the upper surface through a slot provided on the upper surface of the receiving mold. Since a large number of rolling wheels are installed, during pressurizing work, the upper pressurizing mold is pressed down to contact the upper surface of the receiving mold, and the pressurizing mold, the movable mold plate, and the receiving mold are closely superposed, making it possible to perform pressure forming. Without any trouble, except during molding, the rolling wheels are moved upward to separate the movable mold plate upward from the mold receiving surface, and the rotation of the rolling wheels allows the material plate to be placed on the movable mold plate before pressure forming to be removed. This has the effect of making it extremely easy to carry in and take out the pressure-formed plate after pressure-forming.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a plan view of the receiving mold, and FIGS. 4, 5, and 6 show the operation. FIG. 7 is a cutaway front view of each main part showing the state, FIG. 7 is a cutaway front view showing another embodiment, FIG. 8 is a cutaway front view of the released state, and FIG. 9 is a cutaway front view showing a modified example of the pressure mold. It is a bottom view with a section cut away. 1... Receiving mold, 2... Pressure mold, 3... Movable mold plate,
11...Flexible membrane material, a...Material board.

Claims (1)

[Claims] 1 In a device that obtains a cured molded plate by squeezing a raw material plate between a receiving mold and a pressure mold, fluid pressure is applied to the back surface, and the negative pressure during suction brings the material into close contact with the pressure surface of the pressure mold, and the fluid is pumped. A flexible membrane material that sometimes bulges out from the pressurizing surface to release the pressure molding plate is polymerized along the pressurizing surface of the pressurizing mold, and a movable molding plate is provided on the upper surface of the receiving mold, and the movable molding plate is provided on the lower surface of the molding mold. 1. A pressure-cured plate forming apparatus characterized in that a plurality of plate transfer wheels are provided so that a portion of each wheel can be projected upwardly and retracted from a slot provided on the upper surface of a receiving mold.