JP2008246781A - Manufacturing method of thermoplastic resin molded object - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a thermoplastic resin molded object capable of manufacturing the thermoplastic resin molded object having good appearance while shortening a molding cycle. <P>SOLUTION: This manufacturing method of the thermoplastic resin molded object has a heating process for heating the cavity surface 6a of at least one of a first mold 2 and the second mold 3 for forming a cavity along with the first mold 2 by the heating means 17 arranged to the outside of the mold, a supply process for supplying a molten thermoplastic resin in the cavity and a cooling process for cooling the supplied molten thermoplastic resin. At least one of the molds has the metal plate 6 having the cavity surface 6a and the heat insulating member 11 provided on the back side with respect to the cavity surface 6a of the metal plate 6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for producing a thermoplastic resin molded body.

  Thermoplastic resin moldings are used in a wide range of fields such as automobile interior parts, exterior parts, home appliances, and housing-related products because they are economical, lightweight, and formable. Such a thermoplastic resin molded body can be manufactured by a molding method such as injection molding or compression molding. However, in the case of manufacturing a molded body having a complicated shape with an opening, or a metal having a plurality of resin supply gates. When a mold is used, appearance defects such as welds may occur in the obtained molded body.

In order to suppress such appearance defects, a method for producing a thermoplastic resin molded body in which a mold cavity surface is preliminarily heated and injection molded when injection molding a thermoplastic resin is known (for example, Patent Document 1).
Japanese Patent Publication No. 58-40504

  However, in the method for manufacturing a thermoplastic resin molded body described in Patent Document 1, the mold cavity surface is heated by high frequency induction, and then the mold is closed to supply the molten resin. 10), it takes time to cool the mold, and it is difficult to shorten the molding cycle of the thermoplastic resin molded body.

  Therefore, the present invention has been made in view of such circumstances, and is capable of manufacturing a thermoplastic resin molded body that can manufacture a thermoplastic resin molded body having a good appearance while shortening the molding cycle. It aims to provide a method.

  In order to achieve the above object, a method for producing a thermoplastic resin molded body according to the present invention includes at least one of a first mold and a second mold that forms a cavity between the first mold and the second mold. A heating step of heating a cavity surface forming a cavity in one mold by a heating means disposed outside the mold, a supply step of supplying a molten thermoplastic resin into the cavity, and the supplied molten heat A cooling step for cooling the plastic resin, and at least one of the molds includes a metal plate having a cavity surface and a heat insulating member provided on the back surface side of the cavity surface of the metal plate.

  According to the method for manufacturing a thermoplastic resin molded body according to the present invention, a molten thermoplastic resin is supplied into a cavity formed by a mold whose cavity surface is heated by a heating means disposed outside the mold. . For this reason, a desired position can be easily heated, and appearance defects such as welds are less likely to occur in the molded body. In addition, the mold to be heated includes a metal plate having a cavity surface and a heat insulating member provided on the back surface side with respect to the cavity surface of the metal plate. For this reason, only the metal plate can be effectively heated to raise the temperature of the cavity surface, so that the heated mold compared to the conventional manufacturing method of heating the entire die and raising the temperature of the cavity surface The heat capacity of the part can be reduced. As a result, the heating time can be shortened and the cooling time can also be shortened. Therefore, it is possible to obtain a thermoplastic resin molded article having a good appearance while shortening the molding cycle.

  Here, as for the manufacturing method of the thermoplastic resin molding which concerns on this invention, it is preferable that a metal plate is formed by electroforming. Since the cavity surface can be formed into a fine uneven shape, it is possible to produce thermoplastic resin molded bodies having variously designed design surfaces.

  Moreover, it is preferable that the manufacturing method of the thermoplastic resin molding which concerns on this invention is a heating coil in which a heating means can perform high frequency induction heating. Thereby, the cavity surface can be efficiently heated.

  Moreover, it is preferable that the manufacturing method of the thermoplastic resin molding which concerns on this invention partially heats a part of cavity surface in a heating process. As a result, it is possible to effectively heat the portion where appearance defects such as welds are likely to occur.

  Further, in the method for producing a thermoplastic resin molded body according to the present invention, in the supplying step, the temperature of the cavity surface when starting to supply the molten thermoplastic resin into the cavity is equal to or higher than the deflection temperature under load of the thermoplastic resin. Preferably there is. Thereby, it is possible to obtain a thermoplastic resin molded body having an even better appearance.

  Moreover, it is preferable that the manufacturing method of the thermoplastic resin molding which concerns on this invention clamps a 1st metal mold | die and a 2nd metal mold | die in the supply process, supplying the said molten thermoplastic resin. As a result, the injection pressure and the clamping pressure can be reduced, and a compact body with excellent downsizing and quality can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the thermoplastic resin molding which can manufacture the thermoplastic resin molding of a favorable external appearance can be provided, aiming at shortening of a shaping | molding cycle.

  The knowledge of the present invention can be easily understood by considering the following detailed description with reference to the accompanying drawings shown for illustration only. Subsequently, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Where possible, the same parts are denoted by the same reference numerals, and redundant description is omitted.

  First, an example of the metal mold | die used for the manufacturing method of the thermoplastic resin molding which concerns on this invention is demonstrated. As shown in FIG. 1, a thermoplastic resin molding die (hereinafter referred to as “die”) 1 includes a female die (first die) 2 and a male die (second die) 3. A cavity 4 is formed inside the female mold 2 and the male mold 3 in a closed state.

  The female die 2 has a concave cross section, and a metal plate 6 is provided on the cavity 4 side. The metal plate 6 has a thickness of about 2 to 6 mm. For example, a metal such as aluminum alloy, zinc alloy, nickel, nickel alloy, copper, and copper alloy is used in addition to steel and SUS. A surface (hereinafter, referred to as “cavity surface”) 6 a that forms the cavity 4 in the metal plate 6 is formed in an uneven shape corresponding to the pattern of the design surface of the molded thermoplastic resin molded body. The metal plate 6 can be formed using various known methods, but is preferably formed by electroforming. This is because the electroforming method can faithfully reproduce the shape of the product design surface and can produce thermoplastic resin molded products having various design surfaces.

  A plurality of temperature adjusting tubes 7 for adjusting the temperature of the cavity surface 6 a are disposed on the back surface 6 b of the cavity surface 6 a of the metal plate 6. The temperature control pipe 7 is a cylindrical metal pipe made of, for example, copper or the like, and is connected to a cooling medium supply device (not shown) so that a medium made of a liquid or a gas is caused to flow inside, thereby causing a cavity surface. 6a can be cooled.

  As shown in FIG. 2, the temperature control tube 7 is fixed to the back surface 6 b of the metal plate 6 by welding, brazing, or the like using a metal member 8. In order to increase the heat transfer efficiency between the temperature control tube 7 and the metal plate 6, the metal member 8 is preferably made of a material having high thermal conductivity such as silver or copper.

  In addition, the interval between the temperature control tubes 7 adjacent to each other (the distance W between the side walls facing each other between one temperature control tube and the adjacent temperature control tube) is the outer diameter D1 of the temperature control tube 7. It is preferably 5 times or less with respect to (the outer diameter in the direction along the back surface 6b of the temperature control tube 7). Thereby, the contact area of the back surface 6b and the temperature control pipe | tube 7 becomes large, and the metal plate 6 can be cooled uniformly.

Further, as shown in FIG. 3, the metal member 8 is preferably joined to the back surface 6b over other temperature control pipe 7 ₂ adjacent thereto from the temperature control pipe ₇₁ which is fixed. Since the metal member 8 is in contact with the back surface 6b between the temperature control tubes 7 ₁ and 7 ₂ adjacent to each other, the thermal contact area between the temperature control tubes 7 ₁ and 7 ₂ and the metal plate 6 is increased. As a result, the cavity surface 6a can be cooled more uniformly. Furthermore, as shown in FIG. 4, a metal covering member 9 may be provided so as to cover the temperature control tube 7, the metal member 8, and the back surface 6 b from the back surface 6 b side. Here, the metal covering member 9 may be a metal thin plate, a metal net having a large number of meshes, a metal plate having a large number of through holes, or the like. By providing this metal covering member 9, the cavity surface 6a can be cooled more uniformly.

  Further, the cross-sectional shape of the temperature control tube 7 is not limited to the circular shape shown in FIG. That is, the temperature control tube 7 preferably has a cross-sectional shape in which the outer diameter in the direction along the back surface 6b of the metal plate 6 is larger than the outer diameter in the direction intersecting with the direction along the back surface 6b. For example, as shown in FIG. 5, when the outer diameter in the direction intersecting the back surface 6b is D2, the temperature control tube 7 preferably has a rectangular cross section with D1 / D2 larger than 1. It is particularly preferable that D1 / D2 has a rectangular cross-section with 1.5 or more. By setting it as such a cross-sectional shape, the contact area of the temperature control pipe | tube 7 and the back surface 6b becomes large, and heat-transfer efficiency can be improved. The cross-sectional shape is not limited to a rectangular shape, and may be an elliptical shape or a triangular shape.

  In addition, the temperature control pipe 7 may be configured to be separated into a plurality of circuits of two or more systems and controlled separately.

  Returning to FIG. 1, the female die 2 is provided with a heat insulating member 11 so as to cover the back surface 6 b and the temperature control tube 7. The heat insulating member 11 is made of, for example, a thermosetting resin material such as an epoxy resin having a low thermal conductivity, ceramics such as cement, and the like. The metal plate 6 (cavity surface 6a) can be efficiently heated. Moreover, at the time of cooling, the heat from the metal plate 6 can be efficiently transferred toward the temperature control tube 7, and the metal plate 6 (cavity surface 6a) can be efficiently cooled.

  The female mold 2 is provided with a frame member 12 so as to cover the heat insulating member 11 from the outside. The frame member 12 holds the metal plate 6, the temperature adjustment tube 7 and the heat insulating member 11, and the material is not particularly limited as long as the metal plate 6, the temperature adjustment tube 7 and the heat insulating member 11 can be held.

  The male mold 3 has a convex cross section, and two resin supply gates 13 and 14 for supplying molten thermoplastic resin into the cavity 4 are provided on the cavity surface 3a. One resin supply gate may be provided, or three or more resin supply gates may be provided. The resin supply gates 13 and 14 communicate with a resin supply passage 15 formed in the male mold 3. The resin supply passage 15 is connected to an injection nozzle of an injection device 50 that can melt and inject a predetermined amount of the thermoplastic resin, so that the molten thermoplastic resin can be supplied into the cavity. . Further, the male mold 3 is formed with a plurality of temperature adjusting passages 16 for cooling the cavity surface 3a.

  The male plate 3 may also be provided with a metal plate 6 on the cavity side, a temperature control tube may be provided on the back side of the cavity surface 3a of the metal plate 6, and a heat insulating member may be further provided.

  In the pair of molds 1 including the female mold 2 and the male mold 3 described above, the male mold 3 is fixed to a fixed plate of a press device (not shown), the female die 2 is fixed to a movable plate, and is movable by a driving device. The mold can be clamped by moving the board in the direction of the fixed board. The female mold 2 may be fixed to the fixed plate and the male mold 3 may be fixed to the movable plate. Also, the fixed plate can be changed to a movable plate so that both the female mold 2 and the male mold 3 can be moved. It may be.

  Next, a preferred embodiment of the manufacturing method according to the present invention will be described with reference to FIGS. First, a thermoplastic resin is put into an injection apparatus to prepare a molten thermoplastic resin that becomes a base material of a thermoplastic resin molded body.

  Here, as the thermoplastic resin, a thermoplastic resin usually used in compression molding, injection molding, extrusion molding or the like is applied as it is. Examples of such resins include general polypropylene, polyethylene, acrylonitrile-styrene-butadiene block copolymers, polyamides such as polystyrene and nylon, polyvinyl chloride, polycarbonate, acrylic resins, styrene-butadiene block copolymers, and the like. And other thermoplastic resins, thermoplastic elastomers such as EPM and EPDM, mixtures thereof, polymer alloys using these, and the like.

  In addition, these thermoplastic resins may contain fillers such as glass fibers that are usually used, various inorganic and organic fillers, and the like as necessary. Moreover, various additives such as various pigments, lubricants, antistatic agents, stabilizers and the like that are usually used may be contained.

  The thermoplastic resin may be non-foaming or foaming, and may contain a foaming agent. As the foaming agent, a chemical foaming agent may be added, or liquid or gaseous carbon dioxide or nitrogen may be directly injected into the molten resin.

  As the chemical foaming agent, a known chemical foaming agent used in producing a thermoplastic resin foam can be used. Specifically, inorganic foaming agents such as sodium bicarbonate, ammonium bicarbonate and ammonium carbonate, nitroso compounds such as N, N'-dinitrosopentamethylenetetramine, azodicarbonamide, azo such as azobisisobutyronitrile Compounds, sulfonyl hydrazides such as benzenesulfonyl hydrazide, toluenesulfonyl hydrazide, diphenylsulfone-3,3′-disulfonyl hydrazide, and blowing agents such as p-toluenesulfonyl semicarbazide can be used. Furthermore, it is preferable to add salicylic acid, urea or a foaming aid containing these as required.

  In addition, the kind of said foaming agent is suitably selected in consideration of the melting temperature of the thermoplastic resin to be used, the target expansion ratio, and the like. The amount added is adjusted in consideration of the strength, density and the like of the target molded product, but is generally about 0.1 to 5 parts by weight with respect to 100 parts by weight of the resin.

<Heating process>
Next, as shown in FIG. 6 (a), using the mold 1 shown in FIG. 1, the female mold 2 is moved upward to open the female mold 2 and the male mold 3, while heating is performed. As a means, a heating coil 17 capable of high-frequency electromagnetic induction heating is inserted from the outside using a conveying device 18. Then, as shown in FIG. 6B, the heating coil 17 is moved so as to approach the cavity surface 6a of the female mold 2, and the cavity surface 6a of the female mold 2 is heated by high frequency electromagnetic induction. By disposing the heating means outside, a desired position can be easily heated. Moreover, the cavity surface 6a can be efficiently heated by using a heating coil as a heating means. Here, the heating may be performed on the entire surface of the cavity surface 6a, or may be performed on a part of the cavity surface 6a, but partial heating is preferable from the viewpoint of shortening the molding cycle and cost.

  When a part of the cavity surface 6a is partially heated, an area including a portion of the cavity surface 6a corresponding to a portion of the molded body where defects such as welds, silver streaks, and flow marks are likely to occur if molding is performed without heating. It is preferable to heat. For example, the portion where the weld is likely to occur is a portion where two or more flows of the molten thermoplastic resin merge in the cavity 4. When the mold 1 having the two resin supply gates 13 and 14 shown in FIG. 1 is used to mold the thermoplastic resin molded body 19A as shown in FIG. Welds are likely to occur in the vicinity of the intermediate portion L1 between the corresponding positions 13a and 14a. For this reason, it is preferable to heat the area | region including the intermediate part of each resin supply gate 13 and 14 in the cavity surface 6a. Further, when a thermoplastic resin molded body 19B having an opening 21 as shown in FIG. 8 is molded using a mold (not shown) different from that in FIG. 1, it is supplied from a resin supply gate. Since the molten resin wraps around the opening and merges, a weld is likely to occur in the rear edge middle portion L2 of the opening 21 with respect to the position 13b corresponding to the resin supply gate. For this reason, it is preferable to heat the area | region including the position corresponding to the back edge intermediate part L2 of the opening part 21 in a cavity surface.

  The temperature of the cavity surface 6a to be heated is preferably 20 ° C. or more higher than the temperature before heating at the time when the molten thermoplastic resin is supplied into the cavity 4. When the temperature is lower than 20 ° C., appearance defects such as welds tend to occur. The temperature of the cavity surface 6a to be heated is particularly preferably equal to or higher than the deflection temperature under load of the supplied thermoplastic resin. By setting the temperature of the cavity surface 6a to the deflection temperature under load of the thermoplastic resin, it is possible to effectively suppress the appearance defects. The deflection temperature under load can be measured according to the method B of JIS K7191-2.

  When a part of the cavity surface 6a is partially heated, the temperature of the heated cavity surface 6a is 20 times higher than the temperature before heating at the time when the molten thermoplastic resin is supplied into the cavity 4. It is preferable that the temperature is higher by 60 ° C. When the temperature is higher than 60 ° C., the temperature difference between the heated part and the non-heated part becomes large, and there is a tendency that defects such as gloss unevenness are likely to occur on the surface of the molded body. In addition, the mold temperature before heating is preferably 50 ° C. or higher in advance, and particularly preferably 60 ° C. or higher. When the mold temperature is 50 ° C. or less, defects such as uneven gloss on the surface of the molded product tend to occur.

  In order to heat the cavity surface 6a uniformly, the heating coil 17 preferably has a copper tube forming the heating coil 17 having a shape corresponding to the shape of the cavity surface 6a. Further, the heating coil 17 can be changed to a heating means such as an electric heater.

<Supply process>
Subsequently, as shown in FIG. 9A, the heated female mold 2 and male mold 3 are closed to form a cavity 4, and the male 4 is formed in the cavity 4 formed by a pair of male and female molds 1. The molten thermoplastic resin 22 is supplied from the two resin supply gates 13 and 14 through the resin supply passage 15 formed in the mold 3. The molten thermoplastic resin 22 supplied from the resin supply gates 13 and 14 flows in the cavity 4 and merges in the vicinity of an intermediate point between the resin supply gates 13 and 14, and there is a defect such as a weld in this vicinity. It tends to occur. However, since the cavity surface 6a in the vicinity of the junction is heated in advance by the heating coil 17, the speed of solidification when cooling is reduced, and the occurrence of appearance defects such as welds can be suppressed.

  The cavity 4 of the mold 1 when the supply of the molten thermoplastic resin 22 is started has a clearance larger than the target molded body thickness, and the female mold 2 is lowered so that the clearance becomes small after the supply is started. In other words, so-called mold clamping is performed (see FIG. 9B). By performing the mold clamping, the injection pressure and the mold clamping pressure can be reduced, and a compact body with excellent downsizing and quality can be obtained. The timing for performing the mold clamping may be either during the supply of the molten thermoplastic resin or after the supply is completed, but when performing the mold clamping after the completion of the supply, the mold clamping should be started immediately after the completion of the supply. Is preferred. In addition, although the example which clamps in the vertical direction is shown in the figure, the clamping direction may be a vertical direction or a horizontal direction. Further, depending on the use, shape, size, etc. of the thermoplastic resin molded body, even if the molten thermoplastic resin is supplied in a state where the clearance of the cavity 4 is adjusted to substantially the same dimension as the thickness of the thermoplastic resin molded body. Good. Furthermore, when the supply of the molten thermoplastic resin is started, the clearance may be smaller than the target molded body thickness, and the female mold 2 may be raised so that the clearance increases according to the supply amount.

<Cooling and molding process>
The molten thermoplastic resin 22 filled in the cavity is cooled and solidified for a predetermined time. The molten thermoplastic resin 22 is solidified by causing the cooling medium to flow in the temperature adjusting pipe 7 provided in the female mold 2 and in the temperature adjusting passage 16 formed in the male mold 3 so that the cavity surfaces 6 a and 3 a This is done by cooling. As shown in FIG. 9C, when the molten thermoplastic resin 22 is solidified, the movable platen of the press device is raised to open the female mold 2 and the male mold 3, and take out the thermoplastic resin molded body 23. Thereafter, a predetermined treatment is performed to complete a molded product as a product.

  In the method for producing a thermoplastic resin molded body according to the above-described embodiment, the molten thermoplastic resin is formed in the cavity 4 formed by the female mold 2 in which the cavity surface 6a is heated by the heating means disposed outside the mold. Resin 22 is supplied. For this reason, a desired position can be easily heated, and appearance defects such as welds are less likely to occur in the thermoplastic resin molded body 23. In addition, the heated female die 2 includes a metal plate 6 that forms the cavity surface 6 a and a heat insulating member 11 that is provided on the back surface 6 b side with respect to the cavity surface 6 a of the metal plate 6. For this reason, since only the metal plate 6 can be effectively heated to raise the temperature of the cavity surface 6a, it is heated as compared with the conventional manufacturing method in which the entire mold is heated to raise the temperature of the cavity surface. The heat capacity of the mold part can be reduced. As a result, the heating time can be shortened and the cooling time can also be shortened. Therefore, it is possible to obtain the thermoplastic resin molded body 23 having a good appearance while shortening the molding cycle.

  The preferred embodiment of the present invention has been described in detail above, but the present invention is not limited to the above embodiment.

  EXAMPLES Hereinafter, although the preferable Example of this invention is described in detail, this invention is not limited to these Examples.

Example 1
Using the mold 1 shown in FIG. 1, a thermoplastic resin molded body having a width of 600 mm, a length of 800 mm, and a thickness of 2.5 mm having the shape shown in FIG. First, polypropylene (manufactured by Sumitomo Chemical Co., Ltd., trade name: Sumitomo Nobrene AZ864E4, MFR: 30 g / 10 min) was prepared as a thermoplastic resin. Next, a range having a width of 400 mm including the vicinity of the central portion of the cavity surface 6a of the female mold 2 was heated using a high frequency induction heating device (high frequency transmission frequency 20 kHz, output 50 kW). Subsequently, the mold 1 including the female mold 2 and the male mold 3 was closed until a predetermined cavity clearance was reached, and then the melted plastic resin previously melted was supplied and filled into the cavity 4. The mold 1 was opened to obtain a thermoplastic resin molded body. The heating conditions and molding conditions are as follows.
<Heating conditions>
Heating temperature near the center of the mold cavity: 160 ° C
Mold cavity surface temperature at the start of supplying molten thermoplastic resin: 120 ° C
<Molding conditions>
Resin temperature: 230 ° C
Cooling water temperature (for temperature control tube 7): 5 ° C. (Supplying cooling water after heating)
Cooling water temperature (for temperature control passage 16): 40 ° C. (always water flow)
Pressurized surface pressure: 2 MPa

  The resulting thermoplastic resin molded article had good appearance with no weld or transfer unevenness. Further, the cooling time required for the compact to reach 70 ° C. was 32 seconds.

(Comparative Example 1)
10 except that the metal mold 24 shown in FIG. 10, that is, a female mold 26 having a temperature control passage 25 integrally formed therein and having no metal plate or heat insulating member, was used. A plastic resin molding was molded. The obtained thermoplastic molded article had no weld or transfer unevenness in the vicinity of the central portion and had a good appearance, but the cooling time required for the molded article to reach 70 ° C. was 68 seconds.

  From the above, it was confirmed that according to the manufacturing method of the present invention, a thermoplastic resin molded article having a good appearance can be obtained while shortening the molding cycle.

It is sectional drawing which shows an example of the metal mold | die used for the manufacturing method of the thermoplastic resin molding which concerns on this invention. It is sectional drawing which shows the joining form of the temperature control pipe | tube and metal plate of the thermoplastic resin molding die shown in FIG. It is a fragmentary sectional view which shows the other joining form of a temperature control pipe and a metal plate. It is a fragmentary sectional view which shows the other joining form of a temperature control pipe and a metal plate. It is a fragmentary sectional view which shows the other joining form of a temperature control pipe and a metal plate. It is a figure which shows a part of manufacturing process of the manufacturing method of the thermoplastic resin molding which concerns on embodiment of this invention. It is an external appearance perspective view which shows an example of the generation | occurrence | production location of the external appearance defect in a thermoplastic resin molding. It is an external appearance perspective view which shows an example of the generation | occurrence | production location of the external appearance defect in a thermoplastic resin molding. It is a figure which shows a part of manufacturing process of the manufacturing method of the thermoplastic resin molding which concerns on embodiment of this invention. It is sectional drawing which shows the conventional mold for thermoplastic resin molding.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Mold for thermoplastic resin molding, 2 ... Female die, 3 ... Male die, 4 ... Cavity, 6 ... Metal plate, 6a ... Cavity surface, 11 ... Heat insulation member, 17 ... Heating coil, 22 ... Molten thermoplastic Resin, 23... Thermoplastic resin molding.

Claims (6)

Of the second mold that forms a cavity between the first mold and the first mold, a cavity surface that forms the cavity in at least one of the molds is disposed outside the mold. A heating step of heating by heating means,
Supplying a molten thermoplastic resin into the cavity;
A cooling step of cooling the supplied molten thermoplastic resin,
Said at least one metal mold | die has a metal plate which has the said cavity surface, and the manufacturing method of a thermoplastic resin molding which has a heat insulation member provided in the back surface side with respect to the said cavity surface in the said metal plate. The method for producing a thermoplastic resin molded body according to claim 1, wherein the metal plate is formed by electroforming. The method for producing a thermoplastic resin molded body according to claim 1 or 2, wherein the heating means is a heating coil capable of high-frequency induction heating. The method for producing a thermoplastic resin molded body according to any one of claims 1 to 3, wherein a part of the cavity surface is partially heated in the heating step. 5. The temperature of the cavity surface when the supply of the molten thermoplastic resin into the cavity is started in the supplying step is equal to or higher than a deflection temperature under load of the thermoplastic resin. The manufacturing method of the thermoplastic resin molding of description. The thermoplastic resin molded article according to any one of claims 1 to 5, wherein, in the supplying step, the first mold and the second mold are clamped while supplying the molten thermoplastic resin. Production method.

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