TWI610801B - Manufacturing apparatus and manufacturing method of resin molded article - Google Patents

Abstract

The present invention provides a method and a device for producing a resin molded article which can improve the production efficiency of a resin molded article. The apparatus (1) for producing a resin molded article of the present invention comprises: a prepreg heating device for heating a prepreg before being loaded into a mold to a softening temperature or higher; a molding die (2) for molding a resin; a mold heating device for heating the insert mold before the resin is disposed inside to a predetermined mold closing temperature; and a master mold for removably inserting the insert mold; wherein the insert mold system can be maintained as a resin The mold is taken out from the master mold while being held inside the insert mold, and further comprises an insert mold upper mold (2a) and a insert mold lower mold (2b), and the insert mold lower mold system is configured to be formed The insert mold lower molds are divided toward each other in a direction in which the distance between the mold faces (2c) is enlarged.

Description

Manufacturing device and manufacturing method of resin molded product

The present invention relates to a device for producing a resin molded article and a method for producing the same, and more particularly to a resin which is molded into a mold when it is heated to a predetermined softening temperature or higher and softened when cooled to a softening temperature or lower. A manufacturing apparatus and a manufacturing method of a molded article.

Conventionally, there has been known a method for producing a resin molded article obtained by molding a resin into a mold (for example, Patent Document 1).

For example, in the production of a thermoplastic resin or a molded article of a composite material of a thermoplastic resin and a reinforcing fiber, first, an intermediate material (prepreg) in which a resin or a reinforcing fiber is impregnated with a resin is heated to a predetermined temperature and disposed in a mold. . The fluidity of the resin disposed in the mold is maintained by heating the mold to a predetermined temperature. Next, the mold is closed and the prepreg is pressurized. After the pressurization is completed, the mold is cooled and the resin in the mold is cooled and solidified. Then, after the cooling is completed, the mold is opened to take out the molded body.

(previous technical literature) (Patent Literature)

Patent Document 1: Japanese Laid-Open Patent Publication No. 2013-126746

However, in the above conventional method, when the linear expansion ratio of the resin to be formed is different from the linear expansion ratio of the mold, the amount of thermal deformation of the resin may be due to the cooling process after the completion of the pressurization of the prepreg. The amount of thermal deformation of the mold is different to cause interference between the molded article and the mold, and there is a possibility that the molded article is deformed or broken.

Further, in the conventional method, after the resin is placed in the heated mold and pressurized by the press, the mold and the press machine must be occupied while the mold is being cooled and the molded article is taken out from the mold. Therefore, the production efficiency is low. Furthermore, it is necessary to repeat the cycle of heating and cooling of the mold core, resulting in a large loss of energy.

The present invention has been made in order to solve the problems of the above-described conventional techniques, and an object of the invention is to provide a device and a method for producing a resin molded article which can improve the production efficiency of a resin molded article.

In order to achieve the above object, the apparatus for producing a resin molded article according to the first aspect of the present invention is a device for producing a resin molded article obtained by molding a resin into a mold, and the resin is softened when heated to a predetermined softening temperature or higher. And curing when cooled to a softening temperature or lower, the manufacturing apparatus has: a resin heating means, heating the resin before loading the mold to a softening temperature or higher; a molding die for molding a resin; a molding die heating means , so that the insert mold before the resin is placed inside is heated to a predetermined mold closing temperature And the master mold, the insert mold is detachably mounted; the insert mold system can be taken out from the master mold while maintaining the resin inside the insert mold, and further includes a concave mold and a convex mold. The die and the female die are configured to be divided in a direction in which the distance between the die faces which face the opposing die faces is enlarged.

In the invention constructed as above, since the insert molding system can be taken out from the master mold while maintaining the resin in the inside of the insert mold, the insert mold can be taken out from the master mold. Cooling is performed, whereby the occupation time of the apparatus for closing the master mold (for example, the press) can be shortened to the time for closing the master mold, and the production efficiency of the resin molded article can be improved. Furthermore, since the insert molding system includes a female mold and a male mold, and the female mold is configured to be divided in a direction in which the distance between the mold faces which are opposite to each other is formed, the cooling of the insert mold is performed. When the concave die of the insert mold is pressed, the adjacent split faces are separated from each other, thereby preventing the die space surrounded by the die and the punch of the insert die from being reduced, and thereby preventing the compression The force acts on the molded article from the insert mold to cause deformation or breakage. Therefore, according to the present invention, deformation or breakage of the molded article is not caused, and the production efficiency of the resin molded article can be improved.

In addition, the method for producing a resin molded article according to the second aspect of the present invention is a method for producing a resin molded article obtained by molding a resin into a mold, and the resin is softened when heated to a predetermined softening temperature or higher. When it is cooled to below the softening temperature, the method of curing comprises the steps of: heating the resin to a temperature above the softening temperature; heating the insert mold to a predetermined mold closing temperature; and disposing the resin inside the insert mold; The step of closing the insert mold; disposing the insert mold inside the master mold to close the mother mold a step of molding; a step of opening the master mold to take out the insert mold from the master mold; a step of cooling the temperature of the insert mold to a predetermined mold opening temperature below the softening temperature; and removing the resin from the insert mold .

In the invention thus constituted, since the insert mold is taken out from the master mold while maintaining the resin in the inside, and the insert mold is cooled to a predetermined mold opening temperature below the softening temperature, it is possible to The occupation time of the device for closing the master mold (for example, a punch) is shortened to the time for closing the master mold, and the production efficiency of the resin molded article can be improved.

Furthermore, in the present invention, it is preferable that the method for producing a resin molded article has a step of holding the insert mold at a predetermined holding temperature equal to or higher than the mold opening temperature after the step of taking out the insert mold from the master mold.

In the present invention configured as described above, it is possible to improve the texture of the surface of the molded article and the relaxation of the internal stress without increasing the occupation time of the device (for example, the press machine) for closing the master mold.

Furthermore, in the present invention, preferably, in the step of closing the insert mold and the step of closing the master mold, the insert mold is held at a position spaced apart from the closed position of the insert mold by a predetermined interval, and has: After the step of closing the master mold, the inside of the insert mold is subjected to a vacuum suction step; after the inside of the insert mold reaches a predetermined degree of vacuum, the insert mold is closed to the closed position by the master mold a step; and after the step of closing the insert mold to the closed position by the master mold, returning the interior of the insert mold to atmospheric pressure until the step of opening the master mold and removing the insert mold from the master mold The steps.

In the invention constructed as above, the insert mold is held at one side. Separating the closed position of the insert mold by a predetermined interval, vacuum drawing the inside of the insert mold in the master mold, and after the predetermined vacuum degree is reached inside the insert mold, The insert mold is closed to the closed position, and then the interior of the insert mold is returned to atmospheric pressure. In other words, since the inside of the insert mold is vacuumed and the resin is formed by closing the master mold, the inside of the insert mold is returned to atmospheric pressure, so that the air bubbles inside the resin can be made fine by the atmospheric pressure, and even if When the mold is molded by a small pressurizing device, it is possible to obtain a molded article having a finer and smoother surface than the one which is pressurized by a large press using a large pressure.

Further, in the present invention, the resin is preferably a thermoplastic resin or a composite material of a thermoplastic resin and a fiber.

In the present invention constituted as described above, the present production method can be applied to the production of a molded article of a thermoplastic resin or a composite material of a thermoplastic resin and a fiber.

According to the method and apparatus for producing a resin molded article of the present invention, deformation or breakage of the molded article is not caused, and the production efficiency of the resin molded article can be improved.

1‧‧‧Manufacturer of resin molded articles

2‧‧‧ embedded mold

2a‧‧‧Embedded die

2b‧‧‧Embedded die

2c‧‧‧Mold face

2d‧‧‧Divided components

4‧‧‧Female model

4a‧‧‧Female mold

4b‧‧‧Female model

6‧‧‧Vacuum suction suction holes

8‧‧‧Vacuum washers

10‧‧‧heater

10a‧‧‧Upper heater

10b‧‧‧lower heater

12‧‧‧Insulation

14‧‧‧ punching machine

14a‧‧‧ platform

14b‧‧‧Sliding frame

16‧‧‧Axis

W‧‧‧Formed products

Fig. 1 is a schematic cross-sectional view showing a manufacturing apparatus of a resin molded article according to an embodiment of the present invention.

Fig. 2 is a view showing the manufacture of a resin molded article according to an embodiment of the present invention. A top view of the split structure of the insert mold.

Fig. 3 is a flow chart showing a manufacturing flow of a resin molded article according to an embodiment of the present invention.

Fig. 4 is a view showing a state in which the insert mold of the apparatus for manufacturing a resin molded article according to the embodiment of the present invention is heated to a predetermined mold closing temperature, and Fig. 4(a) is a cross-sectional view of the insert mold, Fig. 4 (b) ) is the bottom view of the embedded mold.

Fig. 5 is a view showing a state in which the insert mold of the apparatus for manufacturing a resin molded article according to the embodiment of the present invention is cooled to a predetermined mold opening temperature, and Fig. 5(a) is a cross-sectional view of the insert mold, Fig. 5 ( b) The bottom view of the embedded mold.

(a) and (b) of FIG. 6 are plan views showing a divided structure of a mold insert mold of a manufacturing apparatus for a resin molded article according to a modification of the embodiment of the present invention.

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

First, the configuration of the apparatus for manufacturing a resin molded article according to the embodiment of the present invention will be described with reference to Figs. 1 and 2 . 1 is a schematic cross-sectional view showing a manufacturing apparatus of a resin molded article according to an embodiment of the present invention, and FIG. 2 is a plan view showing a divided structure of a mold inserting die in the apparatus for manufacturing a resin molded article according to the embodiment of the present invention.

The apparatus for producing a resin molded article according to the embodiment of the present invention is a composite material (prepreg) in which a resin and a reinforcing fiber which are softened when heated to a predetermined softening temperature or higher and which are solidified when cooled to a softening temperature or lower. Formed and molded. As such a resin, for example, a thermoplastic resin such as polyamine, polypropylene, polyphenylene sulfide or polyether quinone may be used. Furthermore, in the case of reinforcing fibers, for example, Carbon (asphalt, PAN), inorganic fibers such as glass, guanamine, hydrazine, TETORON (Chinese transliteration: Tedron), synthetic chemical fibers such as nylon, or natural such as hemp, kenaf, medlar, cotton, etc. fiber.

The softening temperature refers to the temperature at which the resin starts to soften and deform due to an increase in temperature, and depends on the physical properties of the resin to be used. As the softening temperature, for example, a load deflection temperature or a vicat softening point can be employed. For example, 30% glass fiber reinforced polyamide 66 has a load deflection temperature of 250 °C.

As shown in Fig. 1, reference numeral 1 denotes a manufacturing apparatus for a resin molded article according to an embodiment of the present invention, the manufacturing apparatus 1 comprising: an insert mold 2 for forming a prepreg; and detachably mounting the insert type The master 4 of the modulo 2. Hereinafter, the right direction in the first drawing is referred to as the X direction, the depth direction is referred to as the Y direction, and the upper direction is referred to as the Z direction.

The insert mold 2 includes an insert mold upper mold 2a for forming a top surface of the prepreg; and an insert mold lower mold 2b for forming a lower surface of the prepreg. The surface of the insert mold upper mold 2a and the insert mold lower mold 2b which are in contact with the prepreg can be formed by obtaining a desired molded product from the prepreg. More specifically, when the insert mold 2 is heated to a predetermined mold closing temperature (for example, 100 ° C), the size of the face of the insert mold upper mold 2a and the insert mold lower mold 2b in contact with the prepreg is It is set to a size of a molded article of a desired size which can be obtained from the prepreg formed by the mold closing temperature.

Further, the surface in which the insert mold 2 is in contact with the mother mold 4 can be formed into an arbitrary shape, and is formed into a flat shape as shown in Fig. 1, for example. In the present embodiment, the insert mold upper mold 2a is a mold core (male mold), and the insert mold lower mold 2b is a mold cavity (female mold).

As the insert mold 2, various metal materials such as steel, copper, and aluminum, or non-metal materials such as ceramics can be used. In the present embodiment, the material of the insert mold 2 will be described with respect to the case where a metal material having a linear expansion ratio larger than that of the above resin is used.

Further, the cavity-type insert mold lower mold 2b can be divided in a direction in which the distance between the mold-forming molds 2b forming the insert mold lower molds 2b is increased. As shown in Fig. 1 and Fig. 2, in the present embodiment, the insert mold 2b is respectively formed in a direction in which the distance between the mold faces 2c facing the insert mold 2b is increased. The X direction and the Y direction are divided into two, and are divided into four total division elements 2d.

Further, the divided surfaces of the divided elements 2d adjacent to each other in the X direction are formed with irregularities having a rectangular wave shape in a plan view, and are adjacent to each other in the X direction by meshing the concave and convex portions with each other. Each of the division elements 2d is slidable in the X direction and is in contact with each other and separated.

Similarly, the divided surfaces of the divided elements 2d adjacent to each other in the Y direction are formed with concave and convex portions having a rectangular wave shape in plan view, and are adjacent to each other in the Y direction by engaging the concave and convex portions with each other. Each of the dividing elements 2d is slidable in the Y direction and is in contact with each other and separated.

The master mold 4 is provided with a mold insert 2 in a detachable manner, and includes a master mold upper mold 4a in which the insert mold upper mold 2a is fitted, and a female mold lower mold 4b in which the insert mold lower mold 2b is fitted. The surfaces of the master mold upper mold 4a and the female mold lower mold 4b contacting the insert mold 2 are respectively formed in conformity with the outer surface of the insert mold 2, that is, respectively, in the insert mold 2 and the female mold. 4 can be formed in such a way as to obtain surface contact.

Further, in the master mold upper mold 4a, the abutting surface of the master mold lower mold 4b (i.e., the lower surface of the master mold upper mold 4a) and the outer surface of the master mold upper mold 4a are formed (in the first figure). The middle side is the vacuum suction port 6 that communicates with each other. The vacuum suction air intake hole 6 is connected to an external vacuum pump (not shown).

Further, a vacuum gasket 8 is provided between the master mold upper mold 4a and the master mold lower mold 4b so as to surround the insert mold 2 and the vacuum suction air intake hole 6.

In the master mold 4, similarly to the insert mold 2, various metal materials such as steel, copper, and aluminum, or non-metal materials such as ceramics can be used.

Further, the manufacturing apparatus 1 for a resin molded article has a heater 10 that maintains the temperature of the insert mold 2 at a mold closing temperature. In the present embodiment, the plate-type upper side heater 10a is attached to the upper surface of the master mold upper mold 4a, and the plate-type lower side heater 10b is attached to the lower surface of the master mold lower mold 4b. The heaters 10 are configured by, for example, embedding a cassette heater at regular intervals in a flat metal block.

Further, the apparatus 1 for manufacturing a resin molded article has a prepreg heating device that heats a prepreg before being loaded into a mold to a softening temperature or higher; and a molding die 2 that heats the prepreg before being disposed inside. The insert mold heating device to the mold closing temperature (all omitted). For such heating devices, for example, a near-field heater can be employed.

Next, a manufacturing process of the resin molded article using the manufacturing apparatus 1 of the present embodiment will be described with reference to Figs. 1 to 5 .

Fig. 3 is a flow chart showing a manufacturing flow of a resin molded article according to an embodiment of the present invention. Fig. 4 is a view showing a state in which the insert mold 2 of the apparatus 1 for manufacturing a resin molded article according to the embodiment of the present invention is heated to a predetermined mold closing temperature. Fig. 4(a) is a cross-sectional view of the insert mold 2, and Fig. 4(b) is a bottom view of the insert mold 2. In addition, FIG. 5 is a view showing a state in which the insert mold 2 of the apparatus 1 for manufacturing a resin molded article according to the embodiment of the present invention is cooled to a predetermined mold opening temperature, and FIG. 5(a) is a cross-sectional view of the insert mold 2. Fig. 5(b) is a bottom view of the insert mold 2.

In the present embodiment, as shown in Fig. 1, in the resin molded article manufacturing apparatus 1, the load is applied from the vertical direction by the press machine 14. Specifically, the female mold lower mold 4b and the lower side heater 10b are fixed to the stage 14a of the press machine 14 through the heat insulating material 12. Further, the master upper mold 4a and the upper heater 10a are fixed to the slide frame 14b of the press machine 14 through the heat insulating material 12, and are moved in the vertical direction together with the slide frame 14b.

Further, the insert mold 2 is detached from the master mold 4 before the production of the resin molded article is started.

Further, the master 4 is preheated by the heater 10 to the vicinity of the mold closing temperature.

Next, as shown in FIG. 3, when the resin molded article is started to be produced, first, in step S1, the prepreg is heated to a temperature higher than the softening temperature of the resin by the prepreg heating device, and by the insert mold heating device. The insert mold 2 is heated to the mold closing temperature. Thus, by heating the insert mold 2 to the vicinity of the mold closing temperature, the split mold upper mold 2a and the split mold members 2b of the insert mold lower mold 2b are expanded.

Next, the process proceeds to step S2, and the prepreg which is heated to a softening temperature or higher and softened is placed inside the insert mold 2. Specifically, the pre-impregnated material pre-cut is placed in the lower mold according to the shape of the molded product. 2b's predetermined location.

Next, the process proceeds to step S3, and the insert mold 2 is closed until the first position between the insert mold upper mold 2a and the insert mold lower mold 2b at a predetermined interval (for example, an interval of 10 mm or less). For example, a spring mechanism (not shown) is provided between the insert mold upper mold 2a and the insert mold lower mold 2b, and the above interval is maintained by the balance between the elastic force of the spring and the weight of the insert mold upper mold 2a. .

Next, the process proceeds to step S4, and the insert mold 2 is placed inside the master mold 4. Specifically, the insert mold 2 is embedded in the master mold lower mold 4b.

Next, the process proceeds to step S5, and the master mold 4 in which the insert mold 2 is disposed is closed. That is, the master mold upper mold 4a is lowered together with the slide frame 14b until the lower surface of the master mold upper mold 4a is in contact with the upper surface of the insert mold upper mold 2a, and the vacuum gasket 8 is replaced by the master mold upper mold 4a and the female mold. The lower mold 4b is sandwiched and compressed. At this time, the position of the master mold 4a is adjusted so as to maintain the interval between the insert mold upper mold 2a and the insert mold lower mold 2b in the step S3.

By closing the master mold 4 in step S5, heat is conducted from the master mold 4 previously heated by the heater 10 to the insert mold 2, and the temperature of the insert mold 2 is maintained near the mold closing temperature. The shape of the space (mold space) surrounded by the insert mold upper mold 2a and the insert mold lower mold 2b held near the mold closing temperature is a size shape for obtaining a desired molded product from the prepreg. .

Next, the process proceeds to step S6, and vacuum suction inside the insert mold 2 is started. By closing the master mold 4 in the above step S4, the vacuum The gasket 8 is sandwiched between the master mold upper mold 4a and the master mold lower mold 4b. In this state, when the vacuum pump connected to the vacuum suction suction hole 6 is operated, air is sucked from the space surrounded by the master mold upper mold 4a, the female mold lower mold 4b, and the vacuum gasket 8 through vacuum suction. The air holes 6 are discharged, and the inside of the insert mold 2 is vacuumed.

Next, proceeding to step S7, after the space surrounded by the master mold upper mold 4a, the female mold lower mold 4b, and the vacuum gasket 8 reaches a predetermined degree of vacuum (for example, 0.3 Torr or less), the insert mold 2 is closed to the embedded type. The distance between the die upper mold 2a and the insert mold lower mold 2b becomes the second position (closed position) of the design thickness of the molded article. Specifically, the master mold upper mold 4a is further lowered from the position in the step S4 together with the slide frame 14b, and the design pressure is applied to the insert mold 2. Thereby, the prepreg is formed into a desired shape.

Next, the process proceeds to step S8, and the vacuum suction by the vacuum pump is ended, and the inside of the insert mold 2 is returned to atmospheric pressure. Next, the process proceeds to step S9, and the master 4 is opened.

Next, the process proceeds to step S10, and the insert mold 2 is taken out from the master mold 4.

Next, proceeding to step S11, the insert mold upper mold 2a and the insert mold lower mold 2b are fixed by a fixing jig (not shown) so that the insert mold 2 is kept closed, and even the insert mold 2 and the forming The product undergoes thermal deformation upon cooling and does not exert excessive external force on the molded article. This fixing jig is formed by a material having a linear expansion ratio equivalent to that of a resin, and the insert mold 2 is held from the outside so as not to interfere with the deformation of the insert mold 2 disposed inside.

Next, the process proceeds to step S12, and the insert mold 2 is cooled to a predetermined mold opening temperature (for example, 50 ° C) below the softening temperature of the resin.

In step S10, the temperature of the insert mold 2 immediately after the moment of removal from the master mold 4 is near the mold closing temperature. Therefore, the dimensional shape of the space surrounded by the insert mold upper mold 2a and the insert mold lower mold 2b is as shown in Fig. 4, and corresponds to the size and shape of the molded article W disposed therein. 4 (a), the lower surface of the peripheral portion of the insert mold upper mold 2a is in contact with the upper surface of the peripheral portion of the insert mold lower mold 2b, and as shown in Fig. 4(b), the insert mold lower mold 2b Each of the dividing elements 2d is in close contact with each other.

Then, when the insert mold 2 is cooled in step S12, the split mold upper mold 2a and the split mold members 2b of the insert mold lower mold 2b are shrunk. Here, the insert mold 2 is formed by a metal material having a linear expansion ratio larger than that of a resin. That is, since the shrinkage of the insert mold 2 due to cooling is larger than the shrinkage of the molded product W due to cooling, the size of the cooled mold space of the insert mold 2 is lower than that after cooling. The molded article W has a small size and shape. However, as described above, the insert mold upper mold 2a and the insert mold lower mold 2b are fixed so that the insert mold 2 is kept closed, and even if the insert mold 2 and the molded product W are thermally deformed upon cooling, Since excessive force is applied to the molded article W, deformation or breakage of the molded article W is not caused.

Specifically, as shown in Fig. 5(a), the insert mold 2 is divided into the insert mold upper mold 2a and the insert mold upper mold 2b in the Z direction (the upper and lower directions in Fig. 5(a)), The insert mold upper mold 2a and the insert mold lower mold 2b are not fixed to each other in the Z direction. Therefore, corresponding to the embedded mold upper mold after being cooled The contraction of the 2a and the insert mold lower mold 2b separates the lower surface of the peripheral portion of the insert mold upper mold 2a from the upper surface of the peripheral portion of the insert mold lower mold 2b, thereby preventing the Z-direction size of the mold space from being reduced. Therefore, the compressive force in the Z direction does not act on the molded article W.

Further, as shown in Fig. 5(b), the insert mold lower mold 2b is in the X direction (the left and right direction in Fig. 5(b)) and the Y direction (the upper and lower directions in Fig. 5(b)). The two divided elements 2d which are adjacent to each other in the X direction are slidable in the X direction and are in contact with each other, and are separated from each other, and the respective divided elements 2d adjacent to each other in the Y direction can be made only to The Y direction slides to contact and separate from each other. Therefore, the respective divided elements 2d adjacent to each other are cooled in accordance with the contraction of the divided mold elements 2b of the molded mold lower mold 2b, whereby the X direction and the Y direction of the mold space can be prevented. Since the size is reduced, the compressive force in the Z direction does not act on the molded article W.

After the cooling of the insert mold 2 is completed, the process proceeds to step S13, and the molded article W is taken out from the insert mold 2 to complete the production of the resin molded article.

Next, a further modification of the embodiment of the present invention will be described.

In the above-described embodiment of the present invention, it is described that the divided surface of each of the split elements 2d adjacent to each other in the insert mold lower mold 2b is formed with a rectangular wave-shaped uneven portion in a plan view, but may be The split structure is different from the one to form the insert mold lower mold 2b.

Fig. 6 is a view showing a division structure of the insert mold 2b of the apparatus 1 for manufacturing a resin molded article according to a modification of the embodiment of the present invention. view. As shown in FIG. 6, the insert mold 2b of the present modification is divided into two in the X direction and the Y direction, and is divided into a total of four divided elements 2d. Further, each of the dividing elements 2d is formed with a through hole extending in the X direction and two through holes extending in the Y direction, and the shaft 16 is inserted through the through holes. The shaft 16 is formed of a material having a linear expansion ratio equivalent to that of the insert mold lower mold 2b, and the through hole is set so that each of the split elements 2d can slide in the X direction and the Y direction along the equal axis 16 The inner diameter and the outer diameter of the shaft 16.

Therefore, when the insert mold 2 is cooled in step S12, as shown in Fig. 6(b), each of the divided elements 2d of the cooled mold lower mold 2b corresponds to its contraction and follows the axis 16 toward X. The direction and the Y direction are contracted, and the dividing elements 2d adjacent to each other are separated from each other, whereby the size of the X-direction and the Y-direction of the mold space can be prevented from being reduced, so that the compressive forces in the X-direction and the Y-direction do not act. In the molded article W.

Further, in the above-described embodiment, the case where the mother die 4 and the heater 10 are separately provided is described, but a heater may be provided inside the mother die 4.

In the above-described embodiment, the apparatus for manufacturing a resin molded article 1 is applied with a load from the vertical direction by the press machine 14. However, the device is not limited to a device that applies a load to the resin molded article manufacturing apparatus 1. For the press 14, various pressurizing means can also be employed.

Further, in the above-described embodiment, the case where the master mold 4 is closed in step S4 and the vacuum gasket 8 is sandwiched between the master mold upper mold 4a and the master mold lower mold 4b is described. Different composition Place a vacuum washer. For example, when the master mold is formed into a convex cross section and the female mold has a concave cross section, and the female mold is closed by inserting the convex portion of the female mold upper mold into the concave portion of the lower mold of the female mold, A vacuum gasket is disposed on the side surface of the convex portion of the upper mold of the master mold. In this configuration, when the master mold is closed, the vacuum gasket slides on the side surface of the concave portion of the lower mold of the master mold.

Furthermore, in the above-described embodiment, the insert mold 2 is taken out from the master mold 4 in step S10 of Fig. 3, and after the insert mold 2 is fixed in step S11, the insert mold is inserted in step S12. The mold 2 is cooled to the mold opening temperature, but the insert mold 2 may be held at a predetermined holding temperature (e.g., 80 ° C) above the mold opening temperature before cooling. Thereby, the texture of the surface of the molded article W can be improved and the internal stress can be alleviated.

Next, the method of manufacturing the resin molded article and the operation and effect of the manufacturing apparatus 1 according to the embodiment of the present invention and the modification of the embodiment of the present invention will be described.

First, since the insert mold 2 can be taken out from the master mold 4 while maintaining the resin in the inside of the insert mold 2, the insert mold 2 can be cooled while being taken out from the master mold 4. Thereby, the occupation time of the apparatus for closing the master mold 4 (for example, a punch) can be shortened to the time for closing the master mold 4, and the production efficiency of the resin molded article can be improved. Furthermore, since the insert mold 2 includes the insert mold lower mold 2b and the insert mold upper mold 2a, and the insert mold lower mold 2b can be used to form the insert mold lower mold 2b opposite to each other. Since the distance between the 2c and the distance is expanded, the split molds 2 are separated from each other according to the shrinkage of the insert mold 2b of the insert mold 2, thereby preventing the adjacent split surfaces from being separated from each other. Embedded mold 2 The mold space surrounded by the insert mold lower mold 2b and the insert mold upper mold 2a is reduced, and thereby the deformation force can be prevented from being deformed or broken by the insert mold 2 acting on the molded product W. Therefore, according to the present invention, deformation or breakage of the molded article W is not caused, and the production efficiency of the resin molded article can be improved.

Further, since the insert mold 2 is taken out from the master mold 4 while maintaining the resin in the inside, and the insert mold 2 is cooled to a predetermined mold opening temperature below the softening temperature, it can be used. The occupation time of the apparatus for closing the master mold 4 (for example, a punch) is shortened to the time for closing the master mold 4, and the production efficiency of the resin molded article can be improved.

Furthermore, since the insert mold 2 is held at a predetermined holding temperature above the mold opening temperature after the step of taking out the insert mold 2 from the master mold 4, the apparatus for closing the master mold 4 may not be caused. When the occupation time of (for example, a press machine) increases, the surface texture of the molded article W is improved and the internal stress is alleviated.

Further, since the insert mold 2 is held at a predetermined interval from the closed position of the insert mold 2, the inside of the insert mold 2 is vacuum-sucked in the master mold 4, and in the insert mold 2 After the interior reaches a predetermined degree of vacuum, the insert mold 2 is closed to the closed position by the master mold 4, and then the interior of the insert mold 2 is returned to atmospheric pressure. In other words, since the inside of the insert mold 2 is vacuumed, and after the mold is closed to form the resin, the inside of the insert mold 2 is returned to atmospheric pressure, so that the air bubbles inside the resin can be fined by atmospheric pressure. Even when the mold is pressurized by a small pressurizing device, it is possible to obtain a fine and smooth surface forming which is equal to or higher than that of a large press using a large press. Product.

Further, the present production method can also be applied to the production of a molded article of a thermoplastic resin or a composite material of a thermoplastic resin and a fiber.

2a‧‧‧Embedded die

2b‧‧‧Embedded die

2d‧‧‧Divided components

W‧‧‧Formed products

Claims (6)

An apparatus for producing a resin molded article, which is a device for producing a resin molded article obtained by molding a resin into a mold, which softens when heated to a predetermined softening temperature or higher, and solidifies when cooled to a temperature lower than the softening temperature. The manufacturing apparatus includes: a resin heating means for heating the resin before being loaded into the mold to a temperature higher than the softening temperature; a molding die for molding the resin; and a mold clamping heating means for arranging the resin The inner insert mold is heated to a predetermined mold closing temperature; and the master mold is detachably mounted to the insert mold; the insert mold system is maintained to maintain the resin in the insert mold The inner mold is taken out from the master mold, and further includes a female mold and a male mold. The female mold is configured to be divided in a direction in which a distance between the mold faces facing the concave molds is increased. A method for producing a resin molded article, which is a method for producing a resin molded article obtained by molding a resin into a mold by using a device for producing a resin molded article according to the first aspect of the invention, wherein the resin is heated to the predetermined Softening above the softening temperature, and curing when cooled below the softening temperature, the manufacturing method having the steps of: heating the resin to above the softening temperature; heating the insert mold to the predetermined mold a step of temperature; disposing the above resin inside the above-mentioned insert mold to close the insert a step of arranging the above-mentioned insert mold in the inside of the master mold to close the master mold; opening the master mold to take out the insert mold from the master mold; and setting the temperature of the insert mold a step of cooling to a predetermined mold opening temperature below the softening temperature; and a step of removing the resin from the insert mold. The method for producing a resin molded article according to claim 2, further comprising: maintaining the insert type at a predetermined holding temperature equal to or higher than the mold opening temperature after the step of taking out the insert mold from the master mold The steps of the mold. The method for producing a resin molded article according to claim 2, wherein the step of closing the insert mold and the step of closing the master mold maintain the insert mold from the above-mentioned insert The closed position of the mold is separated by a predetermined interval, and has a step of vacuum suctioning the inside of the insert mold after the step of closing the master mold; and achieving a predetermined vacuum inside the insert mold a step of closing the insert mold to the closed position by the master mold, and a step of closing the insert mold to the closed position by the master mold, and then opening the mother Molding the above-mentioned embedded mold from the During the step of taking out the master mold, the step of returning the inside of the insert mold to atmospheric pressure is performed. The method for producing a resin molded article according to claim 2, wherein the resin is a thermoplastic resin or a composite material of a thermoplastic resin and a fiber. The method for producing a resin molded article according to claim 4, wherein the resin is a thermoplastic resin or a composite material of a thermoplastic resin and a fiber.