JP2016107614A - Method and apparatus for molding thermoplastic sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermoplastic sheet molding method capable of molding a heated thermoplastic sheet in accordance with a shape of a model to be molded without contacting the thermoplastic sheet with outside air, and to provide a thermoplastic sheet molding apparatus used for molding a thermoplastic sheet.SOLUTION: A thermoplastic sheet molding method includes a step of arranging a thermoplastic sheet 6 between a first sheet 1 perforated with a plurality of holes 2 and a second sheet 7 having a substantially same shape as the first sheet 1. A model to be molded is mounted on a mounting surface of a molding apparatus perforated with a suction hole, the thermoplastic sheet 6 softened so as to cover the model to be molded covers the model to be molded from the first sheet 1, and then air is sucked.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a thermoplastic sheet molding method and a thermoplastic sheet molding apparatus. More specifically, the present invention relates to a method for molding a thermoplastic sheet by heat treatment and a thermoplastic sheet molding apparatus used for molding a thermoplastic sheet.

A dry carbon sheet, which is a thermoplastic sheet, is obtained by baking a carbon fiber soaked with a resin in a high-temperature and high-pressure kettle, which removes unnecessary resin components and is light and rigid.
In order to mold such a dry carbon sheet, it is heated until it softens in an oven and pressed against a model to be molded.

  However, in the case of taking out from the oven and molding, it begins to harden for about 1 to 2 seconds by being exposed to ambient air at normal temperature. It is difficult.

As this type of dry carbon molding method, for example, a method described in Patent Document 1 is known.
Specifically, as shown in FIG. 11, a dry carbon fabric 101 is prepared, placed over the inner tube 102, placed in the upper mold 103 and the lower mold 104, evacuated, added with an adhesive, heated and heated. This is a method of forming a bicycle hub by pressing.

  Since the hub shell is manufactured using the tubular dry carbon fabric by using such a molding method, the manufacturing process of the hub can be simplified.

JP 2011-140277 A

  However, in the invention of Patent Document 1, since a tubular dry carbon fabric is prepared in advance and is molded by heating and pressing in the upper mold and the lower mold in a state of covering the inner pipe, the dry carbon is molded. There is a need to have a shape that matches the model.

  Therefore, it takes time to mold dry carbon in advance according to the shape of the model to be molded, and it is necessary to pressurize in the heating furnace in order to pressure-bond dry carbon to the model to be molded.

  The present invention was devised in view of the above points, and molding a thermoplastic sheet that enables the heated thermoplastic sheet to be molded in accordance with the shape of the model to be molded without touching the outside air. It is an object of the present invention to provide a method and a thermoplastic sheet molding apparatus used for molding a thermoplastic sheet.

  In order to achieve the above object, a thermoplastic sheet molding method according to the present invention includes a first sheet having a plurality of holes perforated, and a second sheet having substantially the same shape as the first sheet. A step of disposing a thermoplastic sheet therebetween, and a step of heating the thermoplastic sheet until the thermoplastic sheet is softened in a state where the thermoplastic sheet is sandwiched between the first sheet and the second sheet. In a state where the model to be molded is mounted on the mounting surface of the molding apparatus with the intake holes opened, and the softened thermoplastic sheet is sandwiched between the first sheet and the second sheet The suction hole and the model to be molded are covered so as to cover the first sheet, and the peripheral edges of the first sheet and the second sheet are fixed to the mounting surface of the molding apparatus. A step of sucking air between the first sheet and the second sheet; After the thermoplastic sheet that is molded to the model shape and cured at room temperature, and a step of removing the first sheet and the second sheet from said thermoplastic sheet.

  Here, the thermoplastic sheet is formed by the step of disposing the thermoplastic sheet between the first sheet having a plurality of holes perforated and the second sheet having substantially the same shape as the first sheet. It becomes possible to make it the state pinched | interposed between the sheet | seat and the 2nd sheet | seat.

  In addition, the thermoplastic sheet can be heated without being exposed to the outside air by the process of heating the thermoplastic sheet until the thermoplastic sheet is softened while being sandwiched between the first sheet and the second sheet. It becomes possible.

  In addition, by the process of placing the molding model on the mounting surface of the molding apparatus in which the suction holes are opened, it is possible to perform intake from the mounting surface on which the molding model is placed.

  Further, with the softened thermoplastic sheet property sandwiched between the first sheet and the second sheet, the intake hole and the model to be molded are covered so as to cover the first sheet, It is possible to inhale in a sealed state of the model to be molded by the step of sucking the space between the first sheet and the second sheet with the peripheral edge of the second sheet fixed to the mounting surface of the molding apparatus. It becomes.

  Further, after the thermoplastic sheet molded into the shape of the molded model is cured at room temperature, the molded thermoplastic sheet can be obtained by removing the first sheet and the second sheet from the thermoplastic sheet. .

  Further, in the method for molding a thermoplastic sheet according to the present invention, in the case where the method includes a step of covering the second sheet so as to cover the third sheet, which is larger than the second sheet, the thermoplastic sheet is used. The second sheet and the third sheet can be firmly adhered to the model to be molded.

  Furthermore, when the second sheet is damaged, the thermoplastic sheet can be brought into close contact with the model to be molded with the third sheet.

  Further, in the method for molding a thermoplastic sheet according to the present invention, when a plurality of thermoplastic sheets are stacked between the first sheet and the second sheet that is substantially the same shape as the first sheet, Molding with a certain thermoplastic sheet becomes possible.

  Further, in the method for molding a thermoplastic sheet according to the present invention, after arranging the thermoplastic sheet between the first sheet and the second sheet, the peripheral portion of the first sheet and the peripheral portion of the second sheet Can be sealed together, the thermoplastic sheet can be sealed between the first sheet and the second sheet.

  Further, in the method for molding a thermoplastic sheet according to the present invention, when the felt is disposed between the mounting surface of the molding apparatus and the first sheet, uniform intake can be performed throughout the felt. Become.

  Further, in the method for molding a thermoplastic sheet according to the present invention, when the thermoplastic sheet is a dry carbon sheet, it is possible to mold a thermoplastic sheet having excellent elasticity and strong resistance.

  In the method for molding a thermoplastic sheet according to the present invention, when the first sheet and the second sheet are silicon sheets, the thermoplastic sheet can be molded without hindrance by having heat resistance and elasticity. Is possible.

  In addition, the thermoplastic sheet molding apparatus according to the present invention includes a planar molding table having a suction surface opened in the mounting surface, and a suction portion communicating with the suction hole.

  Here, it is possible to suck air from the mounting surface by a flat molding table having an intake hole opened in the mounting surface.

  For example, by placing a model to be molded on the mounting surface of the molding device and covering the intake hole and the model to be covered from the first sheet, it is possible to inhale in a state where the model to be molded is sealed. Become.

  In addition, it is possible to perform intake with the molding table fixed in a horizontal state by the suction portion communicated with the intake hole.

  Further, in the thermoplastic sheet molding apparatus according to the present invention, when the intake hole is located at a substantially central position of the placement surface, efficient intake can be performed.

  Moreover, in the thermoplastic sheet molding apparatus according to the present invention, when the suction part is a vacuum pump, it is possible to suck in a vacuum.

  For example, the first sheet, the thermoplastic sheet, and the second sheet are placed on the outer surface of the molded model by creating a vacuum between the first sheet, the thermoplastic sheet, and the second sheet on the mounting surface. It becomes possible to make it adhere.

According to the method for molding a thermoplastic sheet of the present invention, the heated thermoplastic sheet can be molded in accordance with the shape of the model to be molded without touching the outside air.
In addition, according to the thermoplastic sheet molding apparatus of the present invention, it is possible to mold the thermoplastic sheet in accordance with the shape of the model to be molded.

It is a schematic diagram for demonstrating the 1st sheet | seat in the 1st process of an example of the shaping | molding method of the thermoplastic sheet to which this invention is applied. It is a schematic diagram for demonstrating the state which mounted the thermoplastic sheet on the 1st paper sheet in the 1st process of an example of the shaping | molding method of the thermoplastic sheet to which this invention is applied. It is a schematic diagram for demonstrating the 2nd sheet | seat in the 1st process of an example of the shaping | molding method of the thermoplastic sheet to which this invention is applied. Schematic cross-sectional view (A) for explaining the heating state in the second step of an example of a method for molding a thermoplastic sheet to which the present invention is applied, and the second step of an example of a method for molding a thermoplastic sheet to which the present invention is applied It is a plane schematic diagram (B) for demonstrating the heating state in. A side cross-sectional schematic diagram (A) in the third step of an example of a thermoplastic sheet molding method to which the present invention is applied, and a plan schematic diagram of a third step of an example of a thermoplastic sheet molding method to which the present invention is applied (B) ). Side surface schematic view (A) in the fourth step of an example of a method for molding a thermoplastic sheet to which the present invention is applied, and an enlarged schematic diagram of the main part in the fourth step of an example of a method for molding a thermoplastic sheet to which the present invention is applied. It is a figure (B). Schematic cross-sectional view (A) in the fifth step of an example of a method for molding a thermoplastic sheet to which the present invention is applied, and molding state of the thermoplastic sheet in the fifth step of an example of a method for molding a thermoplastic sheet to which the present invention is applied It is a cross-sectional schematic diagram (B) for demonstrating. They are the side surface cross-sectional schematic diagram (A) in the other example of the molding method of the thermoplastic sheet to which this invention is applied, and the enlarged schematic diagram (B) of the principal part in the other example of the thermoplastic sheet to which this invention is applied. Side cross-sectional schematic diagram (A) for explaining an example in which corrugation is incorporated in the method for molding a thermoplastic sheet to which the present invention is applied, and an example of molding in which corrugation is incorporated in the method for molding a thermoplastic sheet to which the present invention is applied It is a schematic diagram (B) for demonstrating. It is a schematic diagram for demonstrating an example of the shaping | molding apparatus of the thermoplastic sheet to which this invention is applied. It is a schematic diagram for demonstrating an example of the shaping | molding method of the conventional dry carbon.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<First Embodiment>
[First step]
FIG. 1 is a schematic diagram for explaining a first sheet in the first step of an example of a method for molding a thermoplastic sheet to which the present invention is applied, and FIG. 2 is an example of a method for molding a thermoplastic sheet to which the present invention is applied. It is a schematic diagram for demonstrating the state which mounted the thermoplastic sheet on the 1st sheet | seat in a 1st process. Further, FIG. 3 is a schematic diagram for explaining the second sheet in the first step of an example of the thermoplastic sheet molding method to which the present invention is applied.

  Here, the first sheet 1 is formed of a square silicon sheet having a thickness of about 1 mm, and air vent holes 2, 2,... Having an inner diameter of about 1 mm are drilled every about 5 mm.

  Each side (4, 4A, 4B, 4C) of the first sheet 1 is on each side of the fixed plate 3 on an annular fixed plate 3 in which the first sheet 1 is made smaller than the first sheet 1. (5, 5A, 5B, 5C) is provided with a certain width and is placed so as to protrude (see FIG. 1).

Next, a dry carbon sheet 6 is placed as a thermoplastic sheet in the frame of the fixing plate 3 of the first sheet 1 (see FIG. 2).
This dry carbon sheet is obtained by baking a carbon fiber soaked with a resin in a high-temperature and high-pressure kettle, and has a characteristic of being softened by heating within a range of 130 ° C to 180 ° C.
Such a dry carbon sheet has a thickness of 0.2 mm to 3.0 mm, for example, and the thickness is selected according to the state of the molded product, or a plurality of dry carbon sheets are stacked.

Subsequently, a second sheet 7 made of a silicon sheet and having the same shape as the first sheet 1 is placed on the first sheet 1 (see FIG. 3).
As a result, the dry carbon sheet 6 is sandwiched between the first sheet 1 and the second sheet 7.

Further, a fixing plate 3A having the same shape as the fixing plate 3 is placed on the second sheet 7 so as to overlap the fixing plate 3 (see FIG. 3).
As a result, the dry carbon sheet 6 is encapsulated between the first sheet 1 and the second sheet 7 within the frame of the fixed plate (3, 3A).

[Second step]
FIG. 4A is a schematic cross-sectional view for explaining a heating state in the second step of an example of a thermoplastic sheet molding method to which the present invention is applied, and FIG. 4B is a thermoplastic sheet to which the present invention is applied. It is a plane schematic diagram for demonstrating the heating state in the 2nd process of an example of this shaping | molding method.

  Here, each side of the fixing plate (3, 3A) is sandwiched by clips 8, 8,... Capable of withstanding the heating temperature (around 180 ° C.) in the oven 9, for example, and 150 ° C. in the oven 9 Heat in the range of ~ 180 ° C for about 15 minutes.

[Third step]
FIG. 5A is a schematic side sectional view in the third step of an example of a method for molding a thermoplastic sheet to which the present invention is applied, and FIG. 5B is an example of a method for molding a thermoplastic sheet to which the present invention is applied. It is a plane schematic diagram in a 3rd process.

  Here, as preparation, for example, the molding apparatus 10 is installed on the work table A with a fixture B such as a vise. In this molding apparatus 10, an intake hole 12 is opened substantially at the center of a molding table 11 formed of a steel plate that is larger than the areas of a first sheet and a second sheet (not shown).

  Further, a support tube portion 13 communicated with the intake hole 12 is provided, and a vacuum pump 15 as a suction portion is attached to the support tube portion 13 via a hose 14.

On the mounting surface 16 of the molding table 11 having such a configuration, the felt 17 is mounted so as to cover the intake hole 12 (see FIG. 5A).
The felt 17 has a size that fits within a frame of a fixed plate (not shown).

By the way, felt is mainly made of wool, and it is simply mechanically entangled into a uniform layer without weaving or knitting. In addition to wool, synthetic fibers, other animal hair and plant fibers, etc. It is made by mixing.
Since the felt 17 having such a configuration has a uniform air gap, the intake air from the intake hole 12 can be uniformly sucked through the entire surface of the felt 17.
Further, the model 18 to be molded is placed in the approximate center on the felt 17.

[Fourth step]
6A is a schematic side sectional view in the fourth step of an example of a thermoplastic sheet molding method to which the present invention is applied, and FIG. 6B is an example of a thermoplastic sheet molding method to which the present invention is applied. It is an expansion schematic diagram of the principal part in a 4th process.

  Here, the first sheet 1, the dry carbon sheet 6, and the second sheet 7 heated in an oven (not shown) in the [second step] until the dry carbon sheet 6 is softened are molded. The molding model 18 placed on the felt 17 on the placing surface 16 of the table 11 is covered so as to cover the first sheet 1 (see FIG. 6A).

  As a result, the dry carbon sheet 6 is sandwiched between the first sheet 1 and the second sheet 7, and the outer surface of the model 18 is softened without being exposed to the outside air and without being lowered in temperature. In close contact with the first sheet 1.

  Further, the fixed plate (3, 3A) is mounted on the mounting surface 16 of the molding table 11 so that the peripheral portions of the first sheet 1 and the second sheet 7 are fixed to the mounting surface 16 and the fixed plate. Within the frame of (3, 3A), the molding model 18 is in a sealed state.

  In this state, as described in detail with reference to FIG. 5 (A), when the vacuum pump 15 performs intake, intake is performed through the felt 17 within the frame of the fixed plate (3, 3A).

  Here, the air is sucked between the first sheet 1 and the second sheet 7 through the air vent holes 2, 2,... Provided in the first sheet 1, so that it is included in the dry carbon sheet 6. Air is also inhaled (see FIG. 6B).

  Thereby, the dry carbon sheet 6 is molded by adsorbing to the outer surface of the model 18 while the dry carbon sheet 6 is firmly attached to the first sheet 1 and the second sheet 7.

[Fifth step]
FIG. 7A is a schematic cross-sectional view in the fifth step of an example of a method for molding a thermoplastic sheet to which the present invention is applied, and FIG. 7B is a first example of a method for molding a thermoplastic sheet to which the present invention is applied. It is a cross-sectional schematic diagram for demonstrating the molding state of the thermoplastic sheet in 5 processes.

Here, a state in which the first sheet 1 and the second sheet 7 are adsorbed on both side surfaces of the dry carbon sheet 6 by sucking the space between the first sheet 1 and the second sheet 7 in a vacuum state. It becomes.
In such a state, the dry carbon sheet 6 is cured by natural cooling or cooling with a fan or the like (see FIG. 7A).

  Thus, after the dry carbon sheet 6 is cured, the first sheet 1 and the second sheet 7 are removed from the dry carbon sheet 6 to complete the molding (see FIG. 7B).

  In the thermoplastic sheet molding method according to the present invention, the dry carbon sheet, which is a thermoplastic sheet, is sandwiched between the first sheet and the second sheet, and is taken out from the oven. It becomes possible to maintain the softened state of the dry carbon sheet.

  In addition, by performing intake air between the first sheet and the second sheet through the air vent hole drilled in the first sheet, the air contained in the dry carbon sheet is inhaled, thereby oxidizing the dry carbon sheet. It becomes possible to prevent.

  Further, high-precision molding can be performed by adsorbing the first sheet and the second sheet to the outer surface of the model to be molded in a state of being in close contact with the dry carbon sheet.

<Another example of the first embodiment>
FIG. 8A is a schematic side sectional view of another example of a method for molding a thermoplastic sheet to which the present invention is applied, and FIG. It is an enlarged schematic diagram.

  Here, the first sheet 1, the dry carbon sheet 6, the second sheet 7, and the third sheet 20 heated in an oven (not shown) until the dry carbon sheet 6 is softened are formed on the molding table 11. The molding target model 18 placed on the felt 17 of the placement surface 16 is covered so as to cover the first sheet 1 (see FIG. 8A).

  As a result, the dry carbon sheet 6 is sandwiched between the first sheet 1 and the second sheet 7, and the first sheet 1 and the second sheet 7 are covered with the third sheet 20. Will be put on.

  Therefore, the dry carbon sheet 6 comes into close contact with the outer surface of the model 18 through the first sheet 1 in a softened state without touching the outside air and without lowering the temperature.

  Further, the first sheet 1 and the second sheet 7 are fixed to the mounting surface 16 of the molding table 11 with the third sheet 20, and the molded model 18 is interposed between the third sheet 20 and the mounting surface 16. Is hermetically sealed.

  In this state, as described in detail with reference to FIG. 5A, when the vacuum pump 15 performs intake, intake is performed through the felt 17.

  Here, intake air is supplied between the first sheet 1, the second sheet 7, the third sheet 20, and the placement surface 16 through the air vent holes 2, 2,... Provided in the first sheet 1. As a result, the air contained in the dry carbon sheet 6 is also taken in (see FIG. 8B).

  Thereby, the dry carbon sheet 6 is adsorbed to the outer surface of the molding model 18 in a state where the dry carbon sheet 6 is firmly adhered to the first sheet 1 and the second sheet 7.

Further, the intake of air is performed between the third sheet 20 and the placement surface 16, so that the third sheet 20 presses the second sheet 7, and the dry carbon sheet 6 is made into the molding model 18. Press.

  Because of this state, the dry carbon sheet 6 can be molded with high accuracy by adsorbing the dry carbon sheet 6 so as to be in close contact with the outer surface of the model 18 to be molded.

<Modification of the first embodiment>
9A is a schematic side sectional view for explaining an example in which corrugation is incorporated in the thermoplastic sheet molding method to which the present invention is applied, and FIG. 9B is a molding of the thermoplastic sheet to which the present invention is applied. It is a schematic diagram for demonstrating an example of the shaping | molding which took corrugation in the method.

  Here, the columnar member 21 formed of an elastic member such as rubber is disposed at a location on the outer surface of the model 18 to be reinforced (see FIG. 9A).

  Then, the first sheet 1, the dry carbon sheet 6, the second sheet 7, and the third sheet 20 that are heated in an oven (not shown) until the dry carbon sheet 6 is softened are placed on the molding table 11. The molding target model 18 placed on the felt 17 of the placement surface 16 is covered so as to cover the first sheet 1 (see FIG. 9A).

  In this state, as described in detail with reference to FIG. 5A, when the vacuum pump 15 performs intake, intake is performed through the felt 17.

  As a result, the dry carbon sheet 6 is brought into close contact with the model 18 and the cylindrical member 21 via the first sheet 1 to produce a molded product of the dry carbon sheet 6 with the corrugation 22 formed on the outer surface. (See FIG. 9B).

  In another example of the first embodiment, a third sheet that is larger than the second sheet is covered so as to cover the second sheet, but the third sheet is necessarily provided. There is no need.

  However, it is desirable to provide the third sheet in that the third sheet is covered so that the thermoplastic sheet can be firmly adhered to the model to be molded by the second sheet and the third sheet.

  In the <first embodiment>, <other examples of the first embodiment>, and <variations of the first embodiment>, the first sheet is substantially the same shape as the first sheet. Although a plurality of thermoplastic sheets are stacked between the second sheet, it is not always necessary to stack a plurality of sheets.

  For example, it is necessary to stack a plurality of molded products that place importance on strong resistance, but there may be a single product that does not require strong resistance.

  In the first embodiment, after the thermoplastic sheet is disposed between the first sheet and the second sheet, the peripheral edge portion of the first sheet and the peripheral edge portion of the second sheet are pressure-bonded to each other. However, it is not always necessary to press-bond in this way.

  However, it is desirable to press the peripheral edge of the first sheet and the peripheral edge of the second sheet together in that the thermoplastic sheet can be sandwiched between the first sheet and the second sheet.

  In the <first embodiment>, <other examples of the first embodiment>, and <modified example of the first embodiment>, the mounting surface of the molding apparatus and the first sheet A felt is placed between them, but it is not always necessary to place a felt.

  However, a negative pressure is generated between the mounting surface and the felt, and a felt is disposed between the mounting surface of the molding apparatus and the first sheet in that uniform suction can be performed through the felt. It is desirable to do.

  In the <first embodiment>, <other examples of the first embodiment>, and <modifications of the first embodiment>, a dry carbon sheet is used as the thermoplastic sheet. However, it is not always necessary to use a dry carbon sheet.

  For example, in addition to the dry carbon sheet, the thermoplastic sheet may be a high-strength fiber in which a glass fiber or an aramid fiber is impregnated with a thermoplastic resin.

  In the <first embodiment>, <other examples of the first embodiment>, and <variations of the first embodiment>, silicon sheets are used as the first sheet and the second sheet. Although used, it is not always necessary to use a silicon sheet.

  For example, a sheet made of any material may be used as long as it is a synthetic resin sheet having heat resistance and heat insulation.

  In the <first embodiment>, <other examples of the first embodiment>, and <variations of the first embodiment>, the thermoplastic sheet is heated until it is softened by an oven. There is no need to heat in an oven.

  For example, any material may be used as long as heating can be performed within a range of 130 ° C. to 180 ° C. where the thermoplastic sheet is softened, such as an electric heater.

<Second Embodiment>
FIG. 10 is a schematic diagram for explaining an example of a thermoplastic sheet molding apparatus to which the present invention is applied.

  The molding apparatus 10 shown here includes a molding table 11 having an intake hole 12 opened substantially at the center of the mounting surface 16 and a vacuum pump 15 disposed in communication with the intake hole 12.

  Here, the forming table 11 is formed with a planar mounting surface 16 which is larger than the surface area of the first sheet 1 described in detail with reference to FIG. An intake hole 12 having an inner diameter of about 1 cm is opened at the approximate center of the mounting surface 16.

  A support pipe 13 is connected to the lower surface of the molding table 11 at right angles to the lower surface of the molding table 11.

  Further, a clamping plate portion 19 is fixed at right angles along the longitudinal direction of the outer peripheral surface of the support tube portion 13. The molding table 11 can be mounted horizontally by clamping the clamping plate 19 with a tool (not shown) such as a vise.

  A vacuum pump 15 is attached to the support tube portion 13 via a hose 14. The vacuum pump 15 is, for example, a motor direct-coupled small-sized oil rotary vacuum pump, which has a characteristic that it can rotate at a higher speed and is smaller than a belt system and can obtain a large exhaust speed (10 L / min).

  By using such a vacuum pump 15, it becomes possible to form a predetermined shape in a vacuum state instantaneously before the thermoplastic sheet is cured.

  In the thermoplastic sheet molding apparatus of the present invention having the above-described configuration, as described in detail in [Third Step] and [Fourth Step] in <First Embodiment>, the molding table 11 is placed. A felt 17 is placed on the surface 16 so as to cover the intake hole 12 (see FIG. 5A).

  Furthermore, a molding model 18 having a surface area that can be covered with a dry carbon sheet is placed on the felt 17 (see FIG. 5A).

  Next, the model 18 to be molded in which the dry carbon sheet 6 heated to be softened in an oven (not shown) is mounted on the felt 17 of the mounting surface 16 of the molding table 11 from the first sheet 1. (See FIG. 6A).

  Here, suction is performed within the frame of the fixed plate (3, 3A) through the felt 17 by performing suction with a vacuum pump (not shown) (see FIG. 6A).

  In this way, air is sucked between the first sheet 1 and the second sheet 7 through the air vent holes 2, 2... Provided in the first sheet 1. The air is also inhaled (see FIG. 6B).

  Thereby, the dry carbon sheet 6 is molded by adsorbing to the outer surface of the model 18 while the dry carbon sheet 6 is firmly attached to the first sheet 1 and the second sheet 7.

  In the thermoplastic sheet molding apparatus of the present invention, a usage example in the above <first embodiment> will be described in detail, but <other examples of the first embodiment>, or <first embodiment>. Needless to say, it is used in the modification of the first embodiment.

  According to the present invention, a model to be molded is placed on a molding table, and the first sheet and the second sheet sealed with a thermoplastic sheet are covered with the model to be molded, and air is sucked by a vacuum pump in an instant. Molding can be performed.

  In the second embodiment, the intake hole is set at a substantially central position of the placement surface. However, the intake hole is not necessarily required at the substantially central position of the placement surface.

  However, in terms of efficient intake, it is desirable that the intake hole be positioned at the approximate center of the mounting surface.

  In the second embodiment, a vacuum pump is used as the suction unit, but it is not always necessary to be a vacuum pump.

  However, it is desirable to use a vacuum pump in that the thermoplastic sheet can be reliably adsorbed to the outer surface of the model to be molded.

DESCRIPTION OF SYMBOLS 1 1st sheet | seat 2 Air vent hole 3, 3A Fixing plate 4, 4A, 4B, 4C Each side 5 of a 1st sheet | seat, 5A, 5B, 5C Each side of a fixing plate 6 Dry carbon sheet 7 2nd sheet | seat 8 Clip 9 Oven 10 Molding device 11 Molding base 12 Intake hole 13 Support tube portion 14 Hose 15 Vacuum pump 16 Mounting surface 17 Felt 18 Model 19 Molding plate portion 20 Third sheet 21 Column member 22 Corrugation

Claims (10)

Disposing a thermoplastic sheet between a first sheet having a plurality of holes perforated and a second sheet having substantially the same shape as the first sheet;
Heating the thermoplastic sheet in a state sandwiched between the first sheet and the second sheet until the thermoplastic sheet is softened;
Placing the model to be molded on the mounting surface of the molding apparatus with the intake holes opened;
Covering the intake hole and the model to be molded from the first sheet with the softened thermoplastic sheet sandwiched between the first sheet and the second sheet, A step of sucking a space between the first sheet and the second sheet in a state in which a peripheral portion of the second sheet is fixed to the mounting surface of the molding apparatus;
A method of molding a thermoplastic sheet, comprising: a step of removing the first sheet and the second sheet from the thermoplastic sheet after curing the thermoplastic sheet molded into the shape of the model to be molded at room temperature. The method for molding a thermoplastic sheet according to claim 1, comprising a step of covering a third sheet that is larger than the second sheet so as to cover the second sheet. The method for molding a thermoplastic sheet according to claim 1 or 2, wherein a plurality of thermoplastic sheets are stacked between the first sheet and a second sheet that is substantially the same shape as the first sheet. The peripheral portion of the first sheet and the peripheral portion of the second sheet are pressure-bonded to each other after the thermoplastic sheet is disposed between the first sheet and the second sheet. Item 4. A method for molding a thermoplastic sheet according to Item 3. The method for molding a thermoplastic sheet according to claim 1, 2, 3, or 4, wherein a felt is disposed between the mounting surface of the molding apparatus and the first sheet. The method for molding a thermoplastic sheet according to claim 1, 2, 3, 4, or 5, wherein the thermoplastic sheet is a dry carbon sheet. The thermoplastic resin according to claim 1, 2, 3, 4, 5, or 6, wherein the first sheet, the second sheet, and the third sheet are silicon sheets. Sheet molding method. A flat molding table with a suction hole on the mounting surface;
A thermoplastic sheet molding apparatus, comprising: a suction portion communicated with the intake hole. The thermoplastic sheet molding device according to claim 8, wherein the intake hole is positioned at a substantially center position of the mounting surface. The thermoplastic sheet molding apparatus according to claim 8, wherein the suction unit is a vacuum pump.

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