JP3680212B2 - Manufacturing method of resin fiber reinforced board - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a method for producing a resin fiber reinforced plate .
[0002]
[Prior art]
It is known that a hot press machine is used to obtain a sheet-like or plate-like product from a material containing a thermoplastic resin.
When these materials are molded by a hot press machine, the material is placed on a molding plate called a carrier plate, sent to the hot press machine together with the molding plate, and molded by a hot plate provided in the hot press machine. The process of heating and pressurizing and molding the material via a working plate has been adopted (for example, Japanese Patent Publication No. 8-32378).
On the other hand, in recent years, an attempt has been made to produce a resin fiber reinforced plate made of a resin material and a plant fiber material.
In the production of such resin-based fiber reinforced plates, it has been proposed to mix these raw materials that have been previously pulverized and the like into materials and form these materials with a hot press.
[0003]
[Problems to be solved by the invention]
Since the conventional molding plate only stops placing the material on the molding plate, the upper heating plate is in direct contact with the surface of the material during heating and pressurization by the heating plate. There was a problem that part of the material melted and adhered to the hot plate.
Further, during the heating and pressurization by the hot plate when molding the resin fiber reinforced plate, heat is applied between the lower surface of the material with the molding plate interposed and the upper surface of the exposed material without the plate interposed. It was inevitable that the temperature distribution due to heating of the plate was different.
For this reason, the finish by molding differs on the upper and lower surfaces of the resin fiber reinforced plate obtained by molding, and when the resin fiber reinforced plate obtained by molding is cooled, the upper and lower surfaces of the resin fiber reinforced plate are cooled. There is a possibility that warping or cracking may occur due to different shrinkage due to the above, and there is a problem that the improvement and stabilization of the quality of the resin fiber reinforced board are hindered.
Further, if the material is powdery or cottony, part of the material may scatter or fall off from the molding plate while the molding plate and the material are both conveyed to the hot press machine.
[0004]
The object of the present invention is that when molding a resin fiber reinforced plate by heating and pressurizing with a hot press machine, part of the material of the resin fiber reinforced plate does not melt and adhere to the hot plate. An object of the present invention is to provide a molding plate for a resin-based fiber reinforced plate capable of improving and stabilizing the quality of the obtained resin-based fiber reinforced plate.
[0005]
[Means and effects for trying to solve the problems]
In order to achieve the above object, the method for producing a resin-based fiber reinforced board according to claim 1 ,
And under molding plate to be mounted thereon a material for resin fiber-reinforced plate, Ri Do from the molding on the plate to be mounted thereon into the material on the bottom for the molding plate on the plate for forming The bottom surface is formed flat, and a molding plate of a resin-based fiber reinforced plate provided with a pair of protrusions on the top surface of the molding lower plate is provided along both sides of the molding lower plate,
A material of a resin-based fiber reinforced plate made of a fibrous or chip-shaped thermoplastic resin and waste paper is placed on the lower molding plate,
The upper plate for molding is placed on the material of the resin fiber reinforced plate,
The lower plate for molding, the material of the resin fiber reinforced plate and the upper plate for molding are collectively brought into a hot press machine, and the lower plate for molding and the mold for molding are fed through a hot plate provided in the hot press machine The upper plate is heated and pressurized, and the resin contained in the material sandwiched between the lower plate for molding and the upper plate for molding is melted and extended, and the material to be extended is the pair of protrusions described above. The body restricts the movement of the molding plate in the width direction, and the material is uniformly extended along the longitudinal direction of the molding lower plate and the molding upper plate. It is characterized by having an orientation along the longitudinal direction .
According to the method for manufacturing a resin fiber reinforced plate according to claim 1, the lower plate for molding is interposed under the material of the resin fiber reinforced plate, while the upper plate for molding is made of the material of the resin fiber reinforced plate. Since it is placed on the top, the plate for molding is heated and pressed by the hot press machine when heated and pressed by the hot plate of the hot press machine.
Therefore, in both the upper and lower molding plates of the material, both the molding plates form a uniform heat distribution by heating of the hot press machine, and both molding plates formed with the uniform heat distribution heat the material and Pressurize.
Therefore, the material is not directly in contact with the hot plate of the hot press machine, and the material is evenly heated and pressurized from the upper and lower molding plates, so that the heat distribution at the upper and lower sides of the material becomes uniform.
In addition, the material can be extended by the pair of protrusions, the movement of the molding plate in the width direction is restricted, and the material is uniformly distributed between the lower plate for molding and the upper plate for molding. By extending along the longitudinal direction, the internal structure of the material being molded can be provided with orientation along the longitudinal direction.
[0006]
The invention according to claim 1 has the following effects.
Since the hot plate does not directly contact the top and bottom of the material, a part of the material does not melt and adhere to the hot plate.
Also, since the temperature distribution due to heating of the hot plate is the same between the lower surface of the material with the lower plate for molding and the upper surface of the material covered with the upper plate for molding, the resin obtained by molding There is no difference in finish due to molding on the upper and lower surfaces of the fiber reinforced sheet.
In addition, when the resin fiber reinforced plate obtained by molding is cooled, the shrinkage due to cooling does not differ between the upper and lower surfaces of the resin fiber reinforced plate, so there is no possibility of warping or cracking, and the resin type The quality and stability of the fiber reinforced board can be improved.
Moreover, even if the material is powdery or cottony, since the material is sandwiched between the lower plate for molding and the upper plate for molding, a part of the material is being transferred to the hot press machine. There is no risk of splashing or dropping from the molding plate.
Furthermore, the molding plate for the resin-based fiber reinforced plate according to the present invention includes a lower plate for molding on which a material for the resin-based fiber reinforced plate can be placed, and can be placed on the material on the lower plate for molding. Therefore, the material can be easily placed on the lower plate for molding.
Furthermore, since the upper plate for molding is placed on the material, the material is pressed by the weight of the upper plate for molding, which promotes pressurization of the hot press machine at the time of molding, and warpage of the material at the time of cooling, etc. Deformation can be suppressed by the upper plate for molding.
[0009]
The method for producing a resin-based fiber reinforced plate according to claim 2 is the method for producing a resin-based fiber reinforced plate according to claim 1 , wherein the height of the protrusion provided on the lower plate for molding is resin fiber. It corresponds to the thickness of the reinforcing plate .
According to the method for producing a resin-based fiber reinforced plate according to claim 2, in addition to the function and effect of the invention according to claim 1 , the upper plate for molding contacts the ridge of the lower plate for molding at the end of molding of the material. By contacting, the thickness of the resin fiber reinforced plate obtained is set corresponding to the height of the protrusion.
The invention according to claim 2 has the following effects.
Since the thickness of the resin fiber reinforced plate is set in accordance with the height of the protrusion provided on the molding lower plate, it is easy to set the thickness of the resin fiber reinforced plate.
[0010]
The method for producing a resin fiber reinforced plate according to claim 3 is the method for producing a resin fiber reinforced plate according to claim 1 or 2, wherein the molding lower plate and the molding upper plate are made of aluminum or stainless steel. It is characterized by being.
According to the method for producing a resin fiber reinforced plate according to claim 3, in addition to the function and effect achieved by the invention according to claim 1 or 2 , the upper plate for molding and the lower plate for molding are made of aluminum or stainless steel. A material having a relatively high thermal conductivity. Therefore, when heating by the hot plate of the hot press machine, the heat from the hot plate quickly spreads over the entire forming plate, and the material is heated almost uniformly through the forming plate.
The invention according to claim 3 has the following effects.
When heating with a hot plate of a hot press machine, the heat from the hot plate spreads quickly throughout the molding plate, and the material is heated almost uniformly through the molding plate. In addition to the fact that molding with uniform heat distribution is performed quickly above and below the material being molded, a resin-based fiber reinforced board with improved quality and stability can be obtained, and the molding time of the material is shortened. It becomes.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A plate for molding a resin fiber reinforced plate according to an embodiment of the present invention will be described with reference to the drawings.
The present invention is not limited to the following embodiments, and various modifications can be made within the scope of the gist of the invention.
The material for the resin-based fiber reinforced board of this embodiment is composed of a fibrous or chip-shaped thermoplastic resin and crushed waste paper, and is formed by heating and pressurizing the material. It is supposed to be.
1 is a perspective view showing a use state of a forming plate according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is an enlarged front view showing a state of the forming plate before and after forming, FIG. These are explanatory drawings which show the manufacture process of the resin fiber reinforced board using the plate for shaping | molding.
[0012]
As shown in FIG. 1, the molding plate 10 according to this embodiment includes a lower molding plate 12 and an upper molding plate 14.
When the molding plate 10 is used, a resin fiber reinforced plate material M (hereinafter referred to as “material M”) is placed on the lower molding plate 12. A molding upper plate 14 is placed thereon.
The molding lower plate 12 and the molding upper plate 14 are both rectangular metal plates whose upper and lower surfaces are flat, and are made of aluminum in this embodiment.
The molding upper plate 14 is a flat plate, but a pair of protrusions 16 and 16 are attached to the surface of the molding lower plate 12 along the longitudinal direction on both sides in the width direction.
These protrusions 16 regulate the material M being molded so as not to move in the width direction of the molding lower plate 12 and the molding upper plate 14 at the time of molding, and the resin-based fiber reinforced plate W obtained by molding. The purpose is to set the thickness.
Therefore, the height H of the protrusions 16 is equal to the thickness T of the resin fiber reinforced plate W obtained by molding (see FIG. 3).
In addition, it is preferable to provide these protrusions 16 on the lower plate 12 for molding so that the protrusions 16 are parallel to each other in order to make the quality uniform based on the orientation of the resin fiber reinforced plate W. .
Furthermore, in this embodiment, the lower plate 12 for molding is set slightly longer than the length of the upper plate 14 for molding.
For this reason, when both ends of the lower plate 12 for molding and the upper plate 14 for molding are aligned, the other end of the lower plate 12 for molding protrudes from the other end of the upper plate 14 for molding.
A through hole 18 is provided near the protruding other end of the molding lower plate 12 (see FIG. 1).
This through hole 18 is provided to facilitate removal when the molding lower plate 12 and the molding upper plate 14 are removed from the hot press machine 20 together with the molded resin fiber reinforced plate W. Then, for example, as shown in FIG. 2, after the front end of the advance / retreat arm 24 having the engagement piece 26 faces the through hole 18, the advancement / retraction arm 24 is engaged by engaging the engagement piece 26 with the through hole 18. The procedure of taking out the procedure such as moving is scheduled.
In this embodiment, the through hole 18 is used. However, instead of the through hole 18, a convex portion or a concave portion that can be locked by the advance / retreat arm 24 may be used.
Although the upper and lower surfaces of the molding upper plate 14 of this embodiment are flat, in order to prevent warping of the molding upper plate 14 due to a rapid temperature change due to heating and cooling, the molding upper plate 14 A groove for preventing warpage may be provided on the upper surface, and a protrusion or groove may be provided on the lower surface.
However, when providing protrusions and grooves on the lower surface of the molding upper plate 14, it is necessary to set the position so as not to interfere with the material M.
[0013]
Next, an example of a method for using the molding plate 10 according to the embodiment of the present invention will be described with reference to FIG.
First, the molding lower plate 12 is conveyed on a conveying means such as a conveyor and then stopped at a predetermined position.
The resin fiber reinforced plate material M is placed on the stopped molding lower plate 12.
In this embodiment, since the material M of the resin fiber reinforced plate is composed of a fibrous or chip-shaped thermoplastic resin and crushed waste paper, it is in a state of being easily scattered.
Therefore, when the material M is placed, the molding upper plate 14 is immediately placed on the material M, and the molding upper plate 14 is placed on the molding lower plate 12, the material M, and molding from below. The stacked state in the order of the upper plate 14 is formed. Next, the molding lower plate 12, the material M, and the molding upper plate 14 are transported together, and the molding lower plate 12, the material M, and the molding upper plate 14 are collectively brought into the hot press machine 20.
By the operation of the hot press machine 20, the upper and lower hot plates 22 of the hot press machine 20 heat and pressurize the lower plate 12 for molding and the upper plate 14 for molding.
The resin contained in the material M sandwiched between the molding lower plate 12 and the molding upper plate 14 is heated through the molding lower plate 12 and the molding upper plate 14 by heating and pressurization of the upper and lower hot plates 22. And is closely bonded to the crushed waste paper contained in the material M.
The molten resin-containing material M is extended by pressurization of the upper and lower hot plates 22 via the lower molding plate 12 and the upper molding plate 14.
At this time, the material M to be extended is restricted from moving in the width direction of the molding plate 10 by the ridges 16 and is uniformly extended along the longitudinal direction of the molding lower plate 12 and the molding upper plate 14. Therefore, the internal structure of the material M during molding has an orientation along the longitudinal direction.
When heating and pressurization are continued, both sides of the lower surface of the molding upper plate 14 come into contact with the protrusions 16 of the molding lower plate 12.
At this point, the molding of the material M is completed, and the resin fiber reinforced plate W is obtained. Therefore, the lower plate 12 for molding, the resin fiber reinforced plate W, the upper plate for molding are transferred from the hot press machine 20 via the advance / retreat arm 24. 14 is taken out together.
The taken-out lower plate 12, resin fiber reinforced plate W, and upper molding plate 14 are cooled together by a cold press machine 30 or the like.
[0014]
As described above, according to the molding plate 10 according to this embodiment, since the molding lower plate 12 and the molding upper plate 14 can be interposed above and below the material M of the resin fiber reinforced plate, a conveyor or the like. The material M can be transported together with the molding lower plate 12 and the molding upper plate 14 on the transport means, and part of the material does not scatter or fall off from the molding plate during transportation. It is possible to prevent foreign matter from being mixed into the material M.
Further, when forming by the hot press machine 20, heat from the hot plate 22 of the hot press machine 20 can be transmitted to the lower plate 12 for molding and the upper plate 14 for molding. Since the upper plate 14 has substantially the same size, the state of the heat distribution with respect to the material M is substantially the same above and below the material M.
For this reason, the material M being molded maintains the same state of heat distribution at the top and bottom even when pressed together with heating, and the upper and lower surfaces of the obtained resin-based fiber reinforced plate W have the same quality to be molded. Will have a face.
For this reason, it is not necessary to distinguish the front surface and the back surface of the resin fiber reinforced plate W, the application of the resin fiber reinforced plate W is expanded, and the handling thereof is facilitated.
Furthermore, since the lower plate 12 for molding and the upper plate 14 for molding are made of aluminum or stainless steel having high thermal conductivity, the heat from the hot plate 22 is quickly generated when the hot plate 22 of the hot press machine 20 is heated. The material M is spread over the entire lower plate 12 and upper molding plate 14, and the material M is heated almost uniformly through the lower molding plate 12 and the upper molding plate 14.
Therefore, in combination with the pressurization by the hot plate 22, the resin fiber reinforced plate in which the molding with uniform heat distribution is performed quickly on the upper and lower sides of the material M being molded, and the quality is improved and stabilized. In addition to obtaining W, the molding time of the material M can be shortened.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a usage state of a molding plate according to an embodiment of the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is an enlarged front view showing a state of a forming plate before and after forming.
FIG. 4 is an explanatory diagram showing a manufacturing process of a resin fiber reinforced plate using a molding plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Molding plate 12 Molding lower plate 14 Molding upper plate 16 Projection body 18 Through-hole 20 Hot press machine 22 Hot plate 24 Advance / retreat arm 26 Locking piece 30 Cold press machine T Thickness H of resin fiber reinforced plate Striate height

Claims (3)

And under molding plate to be mounted thereon a material for resin fiber-reinforced plate, Ri Do from the molding on the plate to be mounted thereon into the material on the bottom for the molding plate on the plate for forming The bottom surface is formed flat, and a molding plate of a resin-based fiber reinforced plate provided with a pair of protrusions on the top surface of the molding lower plate is provided along both sides of the molding lower plate,
A material of a resin-based fiber reinforced plate made of a fibrous or chip-shaped thermoplastic resin and waste paper is placed on the lower molding plate,
The upper plate for molding is placed on the material of the resin fiber reinforced plate,
The lower plate for molding, the material of the resin fiber reinforced plate and the upper plate for molding are collectively brought into a hot press machine, and the lower plate for molding and the mold for molding are fed through a hot plate provided in the hot press machine The upper plate is heated and pressurized, and the resin contained in the material sandwiched between the lower plate for molding and the upper plate for molding is melted and extended, and the material to be extended is the pair of protrusions described above. The body restricts the movement of the molding plate in the width direction, and the material is uniformly extended along the longitudinal direction of the molding lower plate and the molding upper plate. A method for producing a resin-based fiber reinforced board characterized by having an orientation along the longitudinal direction. 2. The method for producing a resin fiber reinforced plate according to claim 1, wherein the height of the protrusion provided on the molding lower plate corresponds to the thickness of the resin fiber reinforced plate. The method for producing a resin-based fiber reinforced plate according to claim 1 or 2, wherein the lower plate for molding and the upper plate for molding are made of aluminum or stainless steel.

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