JPS61255818A - Apparatus for pressure molding of cured plate - Google Patents

Abstract

PURPOSE:To enhance working efficiency by easily and safely demolding a pressure-molded plate without damaging the same, by a method wherein a flexible film material is superposed to a pressure mold along the pressure surface thereof to be closely contacted therewith at the time of molding and pressure is applied to the back surface of the flexible film material at the time of demolding to protrude and deform the film material with respect to the surface of the pressure-molded plate. CONSTITUTION:A material plate (a) is fed in a state placed on a movable mold plate 3 to reach under a pressure mold 2 and a fluid passage is reduced in pressure by communicating a fluid introducing pipe 13 with a suction source to closely contact a flexible film material 11 with the molding surface of the pressure mold 2 under suction and, in this state, the pressure mold 2 is downwardly moved to perform the pressure molding of the material plate (a) between the pressure mold 2 and a receiving mold 1 under pressure. After molding work was finished, if a fluid is fed in the fluid flow passage under pressure in synchronous relation to the upward movement of the pressure mold 2 from the receiving mold 1, the film material 11 is protruded and deformed by the pressure of the fluid applied to the back surface of the flexible film material 11 through a through-hole 12 to be formed into a shape different from the surface shape of the molded material plate (a) and, therefore, the material plate (a) is partially pressed downwardly to collapse the close contact relation between the film material 11 and the material plate (a) and the material plate (a) and the movable mold plate 3 are demolded from the pressure mold 2 under their own wts.

Description

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

When a warm-form material is pressure-molded between a receiving mold and a pressure mold to obtain a hardened molded plate of the layered material, the molded plate adheres closely to the pressure surface of the pressure mold due to compression by the pressure mold, so that after pressure molding, It becomes difficult to take out the molded plate, and it becomes even more difficult to take it out when an uneven pattern is applied to the molding surface at the same time as molding. Conventionally, a spatula is fully inserted into the edge of the molded plate and the plate is gradually peeled off, or air is blown into the edge and the plate is gradually peeled off. In addition, the peeling operation distorts the molded plate, furthermore, it takes a considerable amount of time to peel the entire surface, and a lot of labor and time are consumed in drilling the holes of the NA type, reducing work efficiency.

The purpose of the present invention is to improve the above-mentioned conventional disadvantages, and to improve work efficiency by easily and safely releasing the mold in a short time and without damaging the pressure-formed plate by extremely simple means. In a molding machine that obtains a hardened molded plate by squeezing a material sheet between a pressure mold and a pressure mold, a flexible film material is polymerized along the pressure surface of the pressure mold, and the flexible film material is brought into close contact with the pressure surface during molding. The present invention is characterized in that during demolding, pressure is applied to the back surface of the flexible membrane material to cause the membrane material to bulge and deform with respect to the surface of the pressure-formed plate.

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

In the drawing, (1) shows the fixed receiving mold, and (2) shows the receiving mold (11).
This is a pressurizing mold that is provided to move up and down relative to the mold, and the illustrated example shows one in which the opposing surfaces of both molds (11 (21) are symmetrically corrugated in order to obtain a corrugated hardened plate.

Concave grooves (1 &) T- were formed vertically and horizontally on the upper surface of the receiving mold (1) to drain water when an uncured fallen mold plate containing water was pressure-formed as a raw material plate. Furthermore, the upper surface of the receiving mold (11) has a receiving mold (
11, the shape of the mold surface is wavy in the case of the illustrated example, and the movable mold plate (3) made of a hard material such as a metal plate is completely polymerized, and the material plate a is placed on the upper surface of the movable mold plate (3) to perform pressure molding. After pressure molding, the molding plate on the upper surface of the movable mold plate (3) is carried out together with the movable mold plate (31), and the movable mold plate (31) is also provided with through holes (3a) for drainage evenly distributed. As shown in Figure 1, frame rods (4
) (4) A shaft rod (5) is rotatably mounted at an appropriate interval between them, and a wheel (6) on the shaft rod (5) is mounted.
Place the upper part of each mold (slot hole (7) arranged in IJ)
The movable mold plate (3) can be raised from the surface of the receiving mold (1) by the retractable movement, and the frame rod (41 (4) is always spring-loaded (41)). 4 &)...
...and then energize it so that it moves upward.

Furthermore, a mirror shaft (8) is fully connected to one end of each shaft rod f5J, and a check 2 (9) T- is hung on this, and each shaft rod (53... Drive the wheels (
6) Rotate the movable mold plate (3) placed on this and the material plate a placed on the top surface of the press mold (2).
], and as shown in Figure 1, the material board & t7JO pressure mold (
2), the press mold (2) is moved downward and the material plate is pressed and pressed between the receiving mold (1) and the press mold (2) to form a predetermined shape.

In this case, although not shown, a relatively small wire mesh is interposed between the movable template (3) and the material plate a to allow water that is suddenly included in the material plate during pressure molding to pass through. The fiber materials are captured by the wire mesh without passing through, and these fiber materials are used to form the through holes (3a) of the movable template +31 and the receiving mold (11).
It is possible to prevent the groove (1a) on the surface from being blocked.

In addition, when molding a corrugated molded plate as in the above embodiment, it is necessary to make the movable mold plate T33 a similar shape to the mold surface according to the shape, but when obtaining a flat hardened plate T- An endless belt conveyor is used instead of the movable mold plate (3) as a means of carrying in and out the material plate as well as the pressure-formed plate. It is sometimes used for carrying in, transporting, and molding by stretching it along the line.

As mentioned above, the back surface of the molded plate a, which is pressure-formed between the shape (1) and the pressure mold (2), does not need to be particularly smooth and has through-holes (
3 &) Movable mold plate (3) having a t-movable mold plate (3) or a pressurized mold plate (3), which is easily separated from the nine mold surface which is formed into a relatively rough surface by interposing a wire mesh as described above, without closely adhering to the mold surface. (
The molding surface according to 2) requires a beautiful finish, so the mold surface is made to be a particularly smooth surface, and by applying pressure on this surface, the surface of the molding plate is airtightly joined to the mold surface and adheres to each other. It is extremely difficult to release this from the mold, especially when the molding plate is thin or the mold surface has unevenness due to an embossed pattern. As mentioned above, palliative methods such as peeling off from the edge with a spatula or gradually releasing the mold by blowing air from the edge with a nozzle have been used.

The present invention improves this easier mold release means, by polymerizing a flexible membrane material aυ of rubber or synthetic resin on the mold surface of the pressurizing mold (2), and when forming the bottom, a flexible membrane material αυ is used. The material plate & is pressed between the receiving mold (1) and the pressure mold (2) to form a hardened plate, and after forming, pressure is applied to the back side of the membrane material αυ to press the membrane material αυ against the surface of the molded plate. The mold is released by bulging and deforming, and then the pressure forming plate is applied when a fluid such as air or water is used as a means to apply pressure to the back side of the flexible membrane material αυ. Pressure molding and mold release operation will be explained with reference to FIGS. 4 to 6. 〇The flexible film material Ql) is polymerized on the mold surface by applying pressure to (2) with its periphery, and pressurizing mold (2). Through holes a3t are distributed in communication with the back surface of the membrane material αυ, and the fluid is blown out from each through hole a2 from the fluid introduction pipe αJ, such as air or water, through the branch pipe α4, and the membrane material αυ is Apply pressure to the back,
Each branch pipe α was provided with an opening/closing joint A5.

Thus, as shown in Fig. 4, the movable mold plate (3), on which the material plate obtained in advance by papermaking or other processes is placed, is moved and carried to the lower surface of the pressurized mold (2), and the fluid introduction pipe ( [3t- Flexible membrane material α1J by making the fluid flow path negative pressure by communicating with the suction source: Pressure mold (2] - When moving it downward, as shown in Figure 5, press down against the spring (4 &) together with the material plate &? The material plate & is pressed into a bottom shape between the two.In this case, the water-containing material is squeezed out by the above-mentioned squeezing process, and the water is passed through the holes (3) of the movable template (3).
5a) and the groove (14) of the receiving mold (1) are removed, and the blank plate & is compression-molded to obtain a hardened molded plate. After completing the molding operation, as shown in Figure 6, the pressurizing mold (2) is moved upward relative to the receiving mold (IJ), and fluid is pumped into the fluid flow path in synchronization with the flexible mold through the through hole aat. Due to the fluid pressure applied behind the membrane material αυ, the membrane material (lI) bulges and deforms and takes on a shape different from the surface shape of the molded material plate 10, so that the material plate 't is partially under pressure, and thus The close relationship between the membrane material ■ and the material plate a is broken, and the material plate a as well as the movable mold plate (31 is released from the pressure mold (2) by its own weight and is released from the receiving mold (1) surface by the spring (4&). supported on a protruding rolling wheel (6);
Pressure mold (2) is moved upward and returned to the state shown in Fig. 4. Next, movable mold plate (3) and the pressure molding plate on its upper surface are rotated by rolling wheel (6) by activation of motor α. When the flexible membrane material αυ is removed from the lower surface of the pressure mold (2) and introduced for the next molding operation, it is replaced with a new material plate a. When the contact area between the material plate a and the flexible film material αD is large, the mold release operation often becomes relatively unsmooth because it is necessary to overcome the degree of adhesion and release the mold. Later, in preparation for the next operation, the bulging deformed part (11a) of the nine membrane material αυ formed during linear molding is compressed by suction of working fluid (2
), if the area to be restored is wide, incorrect folds may occur during contraction, and the VC mold surface may be flat and bulge deformation 21 (1
When the width of 1a) is large, irregular folds often occur, and when such folds occur, there is a disadvantage that a defective product with irregular irregularities on the surface of the product may be produced in the next molding.

To eliminate this problem, if a flexible membrane material (111t) is partially provided in the appropriate place for the pressurized type (21), adhesive parts ae with adhesive or the like can be partially provided in Figs. 6, 7, and 8. Even in the molding operation of a wide planar plate as shown in the figure, the membrane material αυ bulges in a small area without bulging greatly during mold release, so the mold release is performed smoothly and there is no improper folding when the membrane material αυ is restored by suction. It is possible to correctly align the mold surface without causing any problems and to prepare for the next molding.Of course, when molding a small area, such a means for providing the adhesive portion αet is not necessarily required.

Next, when mechanical pressure is applied as a means of applying pressure to the back surface of the flexible membrane αυ, the nine flexible Pressing members a7) are provided on the back surface of the flexible membrane material aυ in an appropriately distributed arrangement so as to be able to appear and retract, and in the retracted state, the flexible membrane material aυ is brought into close contact with the molded surface due to its restoring elasticity or adhesion with the suppressing member aη. Pressing member (1
By making it protrude, a bulging deformed portion (11a) is formed.

Although an appropriate mechanism may be adopted for the retracting and retracting operation of the pressing member aη,
In the illustrated example, a fluid cylinder mechanism (18) is used, and the pressing members αη are normally activated by the respective springs α.
L7) The flexible membrane material α1 is caused to protrude and deform locally by pushing against the spring bar.
Thus, as shown in Fig. 9, the material plate & placed on the movable mold plate (3) is carried onto the lower surface of the pressurizing mold (2), and after making a hole, the flexible membrane material an t-m is placed as shown in Fig. 10. Pressurized type that is in close contact with the surface (
2) Pressure mold the material plate and the entire body between 13 and 2) Pressure mold (2) for 11 as shown in Figure 11. At the same time as vomiting, the fluid cylinder mechanism alt-activates and the pressing member (17
) The membrane material αυ is pushed against the t-spring □ to bulge and deform, thereby separating it from the pressure-formed sheet metal membrane surface, and its jIl type operation is the same as in the previous embodiment. , when the pressurizing type t2) returns to the upward movement position, the cylinder mechanism α
By switching the pressurizing state caused by
&) due to the elasticity of the membrane material αυ or by attaching the membrane material (2) to the pressing member (L7) with adhesive, the membrane material αυ can be applied to the mold surface by the retracting operation of the pressing member αD. If necessary, as in the previous embodiment, it is attached to the membrane material antn pressurized ill at the adhesive part αe to form a bulging deformed part (1
After releasing the mold by limiting the area of 1a), the bulging deformed portion (11a)
Restore it so that it smoothly follows the mold surface.

In addition, the formation of the bulging deformation part (11&) at the time of mold release is not done over the entire surface of the film material αυ, but rather over the entire surface of the mold surface as shown in FIG. 15. Used for pressure molding, the bulging deformation portions (11a) are locally provided in any shape (four locations are shown in the illustrated example, but the number can be increased or decreased as desired), and only the periphery thereof is placed on the mold surface. Although adhesively bonded, pressure molding and mold release operations are performed smoothly.

In this way, according to the present invention, the tk is formed by fitting the flexible film material onto the mold surface of the pressure mold, and applying pressure from the back surface by fluid pressure or the pressing movement of a pressing member, so that the mold is This makes it easy to press-form the material plate between the mold and pressurizing material through the flexible membrane material along the surface, and when releasing the mold after pressure-forming, pressure is applied to the back side of the membrane material. By adding the membrane material to the surface of the pressure-formed plate, the membrane material bulges out and deforms to adhere to the membrane material, making it easy to remove the molded plate and make release from the mold extremely smooth. Even when the mold plate has an uneven pattern, it is easy to release the mold, eliminating the disadvantages of conventional palliative mold release methods, and allowing the mold plate to be peeled off from the mold surface in a short time and without damaging the mold plate, improving work efficiency. It has the effect of increasing the hardness and obtaining an excellent pressure-cured plate.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view;
Figure 2 is a side view, Figure 3 is a plan view of the receiving mold, Figures 4 and 5.
In addition to the drawings, FIG. 6 is a cutaway front view of each essential part showing the operating state, FIG. 7 is a cutaway side view showing a modified example of the device of the present invention, FIG. 8 is a cutaway front view of the device in its release state, and FIG. Figures 11 to 11 are cut-away front views of main parts showing still another embodiment, Figure 12 is a side view of Figure 9, and Figure 13 is a partially cut out cross-sectional view showing still another embodiment. It is a bottom view of a pressure mold. (11...Mold (2)...
...Pressure mold (3)...Movable mold plate α
υ...Flexible membrane material (11a)...Bulging deformation part (Iri...Fluid hole (17)...
・Press member Fig. 13

Claims (1)

[Claims] In a molding machine that obtains a hardened molded plate by squeezing a material plate between a receiving mold and a pressure mold, a flexible film material is polymerized along the pressure surface of the pressure mold, and during molding, the flexible film material is placed on the pressure surface. A pressure-cured plate forming apparatus, which is configured to press the back surface of a flexible membrane material to bulge and deform the flexible membrane material against the surface of the pressure-formed plate during mold release.