JP2017154409A - Hot press molding method and hot press molding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot press molding method in which the shape of a molded article is stable, and the high-quality appearance of a surface can be obtained.SOLUTION: The hot press molding method includes: an arrangement step of arranging a workpiece material (14) between a first die (1) having a convex shape and a second die (2) having a concave shape; a contact step of allowing the first and second dies (1, 2) to approach each other to allow the top of the convex shape of the first die (1) and the workpiece material (14) to come into contact with each other; a deformation heating step of allowing the heated workpiece material (14) to approach a bottom dead point with respect to the heated second die (2) to deform and heat the workpiece material (14); a cooling step of cooling the first die (1) and the second die (2) to cool the workpiece material (14); and an extraction step of spacing the first die (1) and the second die (2) from each other and extracting a molded article (15) obtained after completion of molding of the workpiece material (14) after completion of molding. In the deformation heating step, the temperature of the contact surface of the first die (1) with the workpiece material (14) is lower than the temperature of the contact surface of the second die (2) with the workpiece material (14).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for hot press molding a work piece of a resin sheet into a target shape.

As a method for obtaining a molded product having a transferred shape, a hot press molding method and an injection molding method are known.
FIG. 11 shows a hot press molding apparatus described in Patent Document 1 and the like. In this process, the workpiece 14 is heated in advance, and the heated workpiece 14 is placed between the first mold 1 and the second mold 2. Next, while pushing the first mold 1, the workpiece 14 is deformed along the second mold 2, and the first mold 1 comes into close contact with the second mold 2 and pressurizes the workpiece 14. . Next, the workpiece 14 sandwiched between the first mold 1 and the second mold 2 is cooled by the first mold 1 and the second mold 2. After this cooling, the molded product of the workpiece 14 to which the surface shape of the second mold 2 is transferred is opened and taken out.

  FIG. 12 shows an injection molding apparatus described in Patent Document 2 and the like. In the conventional injection molding method, the first mold 1 and the second mold 2 are heated, the second mold 2 is moved, and the cavity is formed in close contact with the first mold 1, and the molten resin The first mold 1 and the second mold 2 are cooled after injection into the cavity. After this cooling, the molded product having the cavity shape transferred thereon is taken out.

JP2015-016649A Patent 5015217

  However, in the conventional hot press molding method, when the workpiece 14 heated in advance is transported into the mold, it naturally cools and the shape cannot be maintained. Therefore, in Patent Document 1, a heater 16 capable of individually heating the first mold 1 and the second mold 2 and a cooling water pipe 18 capable of individually cooling the first mold 1 and the second mold 2 are provided, The mold is heated to a temperature at which the resin softens, and after the molding, the mold is cooled, the resin is solidified, and the molded product can be taken out.

  In addition, in the conventional injection molding method, molten resin is injected and allowed to follow the mold shape, but at the moment of injection, heat is lost to the mold, so that the resin flow deteriorates and molding such as sink marks and welds is formed. Deterioration and appearance quality such as loss of gloss on the surface of the molded product will be deteriorated. Therefore, in Patent Document 2, the mold is heated, the mold is heated to a high temperature when the resin is injected, and after injection filling, the mold is cooled and molded.

  In the case where the molded product has a deep drawing shape or the like, in Patent Document 1, since the timing at which the workpiece 14 and the mold come into contact varies depending on the location, the amount of heat supplied from the mold to the workpiece 14 by heat conduction is calculated. The coming time varies depending on the location, and the degree of softening of the surface of the workpiece 14 varies. As for cooling, the stress state of the workpiece 14 after cooling varies depending on the temperature state of the front and back surfaces of the workpiece 14, and the film after molding may be warped.

  In Patent Document 2, the mold surface temperature is not uniform because the pitch between the heaters 16 and the distance between the heater and the mold surface cannot be evenly arranged due to the mold shape, or the heat transfer variation of the mold material. Furthermore, when the mold is cooled, the mold surface temperature becomes non-uniform due to variations in heat transfer due to the pitch between the cooling water pipes 18 and the heat transfer variation of the mold material. As a result, the temperature distribution within the surface of the molded product varies and the appearance quality deteriorates.

  An object of the present invention is to provide a hot press molding method and apparatus capable of obtaining a molded product having a stable shape and obtaining a high-quality appearance of the surface of the molded product in the hot press molding method. .

  The hot press molding method of the present invention includes an arrangement step of arranging a workpiece between a first mold having a convex shape and a second mold having a concave shape, and approaching the first and second molds. Letting the convex top of the first mold come into contact with the workpiece, and bringing the heated workpiece closer to the bottom dead center with respect to the heated second mold, A deformation heating process for deforming and heating the workpiece, a cooling process for cooling the first mold and the second mold to cool the workpiece, the first mold and the second mold A step of taking out a molded product that has been molded by separating the mold from the workpiece, and contacting the workpiece of the first mold in the deformation heating step. The temperature of the surface is lower than the temperature of the contact surface of the second mold with the workpiece.

Moreover, the hot press molding apparatus of the present invention includes a first mold having a convex shape, a second mold having a concave shape, and a bottom dead center with respect to the second mold that has heated the first mold. When the workpiece is deformed and heated close, the temperature of the contact surface of the first mold with the workpiece becomes lower than the temperature of the contact surface of the workpiece of the second mold. And a temperature control device for controlling the temperature as described above.

  According to this configuration, since the temperature of the contact surface with the workpiece of the first mold in the deformation heating step is lower than the temperature of the contact surface with the workpiece of the second mold, the workpiece of the resin sheet A molded product having a stable shape can be obtained, and a high-quality surface appearance can be obtained.

The block diagram of the hot press molding apparatus which performs the hot press molding method of this invention Sequence diagram of this hot press molding device Explanatory drawing of temperature profile of molding process of this hot press molding device Explanatory drawing of a specific example of temperature control of this hot press molding device Explanatory drawing of a specific example of temperature control of this hot press molding device Enlarged cross-sectional view of workpiece (A) plan view and (b) cross-sectional view showing the arrangement of heaters in the first mold when the shape of the molded product is a fan shape (A) plan view and (b) cross-sectional view showing the arrangement of heaters in the second mold when the shape of the molded product is fan-shaped (A) Plan view and (b) Distribution diagram of watt density in the heater length direction showing the arrangement of heaters in the first mold when the shape of the molded product is a fan shape. (A) sectional view and (b) side view showing distribution of watt density in the heater length direction when the distance between the heater and the mold surface is different The figure which showed the conventional shaping | molding method described in patent document 1 The figure which showed the conventional shaping | molding method described in patent document 2

Hereinafter, the hot press molding apparatus which implement | achieves the hot press molding method of this invention is demonstrated based on FIGS.
FIG. 1 shows a hot press molding apparatus according to Embodiment 1 of the present invention.

This apparatus has a first mold 1 having a convex mold and a second mold 2 having a concave mold.
The first mold 1 includes a heater 16a, a temperature sensor 17a, and a cooling water pipe 18a. The first mold 1 is divided into a plurality of temperature control zones, in this embodiment, first, second, and third temperature control zones 6, 7, and 8. A plurality of heaters 16a are provided for each temperature control zone. Built in. A temperature sensor 17a is incorporated in each of the first, second, and third temperature control zones 6, 7, and 8. The temperature sensor 17a for each of the first, second, and third temperature control zones 6, 7, and 8 is read by the temperature control device 4, and the first, second, and third temperature control zones 6, 7, and 8 during the heating period. Energization of the heater 16a is controlled by the temperature control device 4 so that each temperature approaches the target value. Further, during the cooling period, the temperature control device 4 via the chilled water control device 5 and the cooling water valve 19 so that the temperature of each of the first, second, third temperature control zones 6, 7, 8 approaches the target value. The water flow to the cooling water pipe 18a is controlled.

Similarly, the second mold 2 includes a heater 16b, a temperature sensor 17b, and a cooling water pipe 18b. The second mold 2 is divided into a plurality of temperature control zones, which are the fourth, fifth, sixth, seventh and eighth temperature control zones 9, 10, 11, 12, 13 in this embodiment, and the heater 16b. Are incorporated in each temperature control zone. A temperature sensor 17b is incorporated in each of the fourth to eighth temperature control zones 9 to 13. The temperature sensor 17b for each of the fourth to eighth temperature control zones 9 to 13 is read by the temperature control device 4 so that the temperature for each of the fourth to eighth temperature control zones 9 to 13 in the heating period approaches the target value. Energization to the heater 16b is controlled. Further, during the cooling period, the temperature control device 4 and the cooling water valve 19 pass the cooling water pipe 18b through the cooling water control device 5 and the cooling water valve 19 so that the temperatures of the fourth to eighth temperature control zones 9 to 13 approach the target value. The water flow is controlled.

  Although three temperature control zones are set for the first mold 1 and five temperature control zones are set for the second mold 2, the present invention is not limited to this. The number of temperature control zones of the first mold 1 is smaller than the number of temperature control zones of the second mold 2.

The heaters 16a and 16b are described as rod-shaped cartridge heaters in the text, but are not limited thereto.
The sequence of this hot press molding apparatus is executed with one cycle from FIG. 2 (a) to FIG. 2 (h).

  In the arrangement step shown in FIG. 2A, a work piece 14 of a resin sheet is arranged between the first mold 1 having a convex shape and the second mold 2 having a concave shape. Specific examples of the workpiece 14 include a sheet in which the fiber layer 21 is centered as shown in FIG. 6 and the resin layers 20 and 22 are laminated on both sides, a sheet in which a plurality of resin sheets are laminated, and a fiber layer. An example is a sheet that contains it.

In the contact step shown in FIG. 2 (b), the first mold 1 is brought close to the second mold 2, and the apex of the first mold 1 contacts the workpiece 14.
2 (c) to 2 (f), the heated first mold 1 is brought close to the bottom dead center with respect to the heated second mold 2 to deform the workpiece 14. And heat. 2 (c) shows a deformation start process, FIG. 2 (d) shows a first mold side deformation process, FIG. 2 (e) shows a second mold side deformation process, and FIG. 2 (f) shows a hot press process in detail. I will explain later.

In the cooling step of FIG. 2G, the first mold 1 and the second mold 2 are cooled to cool the workpiece 14 being processed.
2 (h), the first mold 1 and the second mold 2 are separated from each other, and a molded product in which the workpiece 14 is molded and finished into a target shape is taken out.

    The heating and cooling of the first mold 1 and the second mold 2 in the deformation heating process of FIGS. 2C to 2F are divided into first to eighth temperature control zones 6 to 13 individually. The temperature of the contact surface of the workpiece 14 of the first mold 1 in this deformation heating step is set to a temperature lower than the temperature of the contact surface of the second mold 2 with the workpiece 14. Molding.

The operation during hot press molding will be described in detail.
2A, the workpiece 14 is supplied to the second mold 2 at a predetermined position. At this time, the first mold 1 and the second mold 2 are controlled to a predetermined temperature higher than the melting point of the resin material of the workpiece 14.

In the contact step of FIG. 2B, the workpiece 14 comes into contact with the apex of the convex portion of the first mold 1 that has started moving.
In the deformation heating process at the start of deformation in FIG. 2C, the workpiece 14 is started to bend by further bringing the first mold 1 and the second mold 2 closer to each other and closing the mold.

  In the deformation heating process of the first mold side deformation in FIG. 2D, the first mold 1 is further pushed into the second mold 2 so that the second mold 2 as shown in FIG. The workpiece 14 further deforms along

  The deformation heating process of the hot press in FIG. 2 (f) has a mold temperature higher than the melting point of the resin material of the workpiece 14 in a state where the first mold 1 reaches the bottom dead center or the limit. Hold the state for a certain time.

  In the cooling process of FIG. 2G, the first mold 1 is held at the cooling temperature for a certain time in a state where the first die 1 has reached the bottom dead center or the limit. Note that the warping of the deformed workpiece 14 is stabilized by starting the cooling of the first mold 1 before the second mold 2.

2 (h), the molded product 15 in which the workpiece 14 is molded is taken out by returning the first mold 1 to the original state.
Next, the temperature profile during the molding operation of the first mold 1 and the second mold 2 in the molding process shown in FIGS. 2A to 2H will be described in detail with reference to FIG.

  A is the temperature profile of the fourth and eighth temperature control zones 9 and 13, B is the temperature profile of the fifth and seventh temperature control zones 10 and 12, and C is the first, second and third temperature control zones 6 and 7. , 8, D indicates the temperature profile of the sixth temperature control zone 11.

  From the state in which the first mold 1 and the second mold 2 are opened to the hot pressing step of FIG. 2 (f), the first to eighth temperature control zones 6 to 6 of the first mold 1 and the second mold 2. Each 13 is heated to increase the temperature.

  2 (a), the workpiece 14 is supplied and after a predetermined time has elapsed, or after each zone of the first mold 1 and the second mold 2 reaches a predetermined temperature, FIG. ) Is started, the first mold 1 is moved toward the second mold 2, and the mold closing operation is started. Note that after the predetermined temperature is reached, the temperature of the mold is higher than the melting point of the resin material of the workpiece 14, and the entire mold surface is desired to be close to the melting point. Higher temperature. At the same time, heat tends to concentrate in the central portion of the mold, and generally the set temperature may be lower. In addition, as shown in FIG. 1, on the other hand, since there is a difference in temperature detection sensitivity depending on the installation location of the temperature sensor, in the sixth temperature control zone 11, the mold surface temperature is in the vicinity of the melting point even if the temperature setting is low. On the other hand, since the temperature rise of the fourth and eighth temperature control zones 9 and 13 on both sides is slower than that of the central portion, if the temperature is not high at the temperature measurement point, Does not reach the melting point.

  After the deformation heating process of FIG. 2 (c) and the deformation heating process of the first mold side deformation of FIGS. 2 (d) and 2 (e), the first mold 1 is lowered in the hot press process of FIG. 2 (f). When the dead point or the limit is reached, in the cooling step of FIG. 2 (g), heating is stopped, cooling water is passed through the first mold 1 and the second mold 2, and the mold is cooled. When the first mold 1 reaches the bottom dead center or the limit, the temperature of the surfaces of the first mold 1 and the second mold 2 is set to a predetermined temperature for each temperature control zone. The control device 4 controls the heating of the heaters 16a and 16b disposed in the first to eighth temperature control zones 6 to 13.

  At this time, although it depends on the shape of the molded product, in the case of the shape of the present embodiment, the temperature of the contact surface with the workpiece 14 of the first mold 1 having the convex shape is set to the second metal having the concave shape. By setting the temperature lower than the temperature of the sheet contact surface of the mold 2, in the state of the molded product 15, the first mold 1 side becomes concave and the second mold 2 side protrudes. The shape of the second mold 2 having a higher temperature can increase the thermal expansion of the surface of the molded product, and the stability of the concave shape can be improved by providing a difference in thermal expansion between the front and back of the molded product.

  Further, the timing at which the workpiece 14 is bent and deformed by the first mold 1 and contacts the second mold 2 is the fourth and eighth temperature control zones 9 and 13 in the peripheral portion and the fifth in the central portion. The sixth and seventh temperature control zones 10, 11, and 12 are different, and the temperature control device 4 changes the temperature setting for each temperature control zone. In particular, in order to equalize the amount of heat supplied to the workpiece 14, the sixth temperature control zone 11 may be set lower than the fourth and eighth temperature control zones 9 and 13 in the peripheral portion. Depending on the shape, the entire surface is set to a uniform temperature. The temperature of the 1st metal mold | die 1 and the 2nd metal mold | die 2 may be made the same.

  The heating of the first mold 1 is stopped after the workpiece 14 comes into contact with the first mold 1, the heating is stopped for each temperature control zone in the order of contact, and the second mold 2 is The heating is stopped for each temperature control zone in order from the end portion that comes into contact with the tip, and the heating energy supplied to the sheet surface is made uniform.

Here, the case where the temperature is made uniform will be described by taking the case of the first mold 1 as an example. The same applies to the second mold 2.
FIG. 4 shows an embodiment in which the temperatures of the first temperature control zone 6, the second temperature control zone 7, and the third temperature control zone 8 are made uniform. Although FIG. 4 shows an example in three zones, the number and combinations are not limited to this. In the first to eighth temperature control zones 6 to 13, due to the degree of contact between the heater and the mold and the variation in the thermal conductivity depending on the material of the mold, the heating rate of the mold surface with respect to the heating of the heater is Depending on the location, the actual mold surface temperature may rise later than the heater temperature. Therefore, in FIG. 4, when the temperature rise of the first temperature control zone 6 is fast and the temperature rise of the third temperature control zone 8 is delayed from the heater heating, the first temperature control zone 6 performs the heater heating and the second temperature. The heater heating is stopped earlier than the control zone 7 to enter cooling, and the third temperature control zone 8 sets the leaving time after stopping the heater, and waits for the heat to be transferred from the heater to the mold surface. The temperature of the mold surface is controlled to a predetermined temperature. On the other hand, similarly during cooling, the first temperature control zone 6 and the second temperature control zone 7 allow cooling water to flow down to a predetermined temperature after entering the cooling operation. When the temperature rises faster in 6, the second temperature control zone 7 is first heated after the cooling is finished, and the first temperature control zone 6 is heated after the predetermined standing time is finished. Control the temperature so that On the other hand, for the third temperature control zone 8, when the mold surface temperature changes later than the heater temperature, the time loss during heating is absorbed by simultaneously performing the cooling operation and the heating operation.

  Further, in FIG. 5, a time chart for simultaneously performing heating and cooling of the heater at the time of cooling in order to prevent an insufficient temperature rise at the time of heating due to a temperature drop due to overcooling or to prevent an excessive temperature rise at the time of heating. Show. Here, as in FIG. 4, examples in three zones are shown, but the number and combination are not limited thereto. In the case where the mold surface temperature rise in the third temperature control zone 8 is slower than the heater temperature rise, in order to prevent an excessive temperature rise, there is an effect of suppressing the temperature rise by circulating the cooling water before the end of heating. On the other hand, when the number of temperature control zones is larger than that of the cooling circuit, the cooling effect of the cooling circuit may reach a plurality of temperature control zones. Therefore, due to overcooling, the temperature rise may not be in time when entering the next molding cycle. Therefore, in order to intentionally slow down the cooling, the heater of the third temperature control zone 8 is turned on before the cooling is finished, and heating is performed so that the temperature does not fall below a predetermined temperature. This has the effect of suppressing temperature variations due to cooling and keeping the mold temperature state before heating constant.

7 and 8 show examples of temperature control zones when the shape of the molded product is a fan shape.
FIG. 7A is a plan view showing the arrangement of heaters in the first mold 1, and FIG. 7B is a cross-sectional view of FIG. 7A. The first mold 1 has a fan shape in which the width W1 at one end of the convex portion is narrower than the width W2 at the other end of the convex portion. In the first, second, and third temperature control zones 6, 7, and 8 of the first mold 1, a plurality of heaters 16 a are embedded along fan-shaped convex portions. The width W3 at one end of the plurality of heaters 16a is narrower than the width W4 at the other end.

  FIG. 8A is a plan view showing the arrangement of heaters in the second mold 2, and FIG. 8B is a cross-sectional view of FIG. 8A. In FIG. 8A, the mold shape is indicated by a virtual line, and the second mold 2 has a fan shape in which the width W5 at one end of the recess is narrower than the width W6 at the other end of the recess. In the fourth to eighth temperature control zones 9 to 13 of the second mold 2, a plurality of heaters 16 b are embedded along the fan-shaped recesses. The width W7 at one end of the plurality of heaters 16b is narrower than the width W8 at the other end.

  Thus, when the width between the heaters 16a and 16b is different between the upper and lower sides in the figure, even if the temperature control is performed for each temperature control zone, temperature variation occurs in the temperature control zone. That is, when heating is simultaneously performed by a plurality of heaters 16a and 16b, the temperature rise is fast when the width between the heaters is narrow, and the temperature rise is slow when the width is wide.

  In this embodiment, as shown in FIGS. 9A and 9B, by changing the winding pitch of the heater wire in one heater, the heater power [W] is divided by the heater surface area [cm2]. The watt density [W / cm 2], which is the power value per surface, is changed to control the temperature rise within a predetermined range. That is, as in the case of the convex portion of the first mold 1 shown in FIG. 9A, each heater 16b embedded in the first mold 1 has a fan-like convex shape as shown in FIG. The watt density P1 of the heater 16b in the widest part of the convex part, the watt density P4 of the heater 16b in the narrowest part of the convex part, and the narrowest part from the widest part of the convex part. When the watt density P2 and P3 of the heater 16b in the gradually narrowing section is set, P1> P2> P3> P4, and the watt density in the section corresponding to the widest portion of the convex portion is the largest.

  Further, even when the distance between the heater 16b and the mold surface is different, as shown in FIGS. 10 (a) and 10 (b), the degree of temperature rise on the mold surface is predetermined by changing the watt density in one heater 16b. The range is controlled. In other words, each embedded heater 16b corresponds to a distance z1> z2> z3> z4 from the heater 16b to the surface of the recess, as in the case of the recess of the second mold 2 shown in FIG. When the watt density P1 of the heater 16b at the longest distance, the watt density P4 of the heater 16b at the shortest distance, and the watt densities P2 and P3 of the heater 16b in the interval, P1> P2> P3 > At P4, the watt density in the section corresponding to the longest distance portion is the largest. The same applies to the heater 16a.

  With such a configuration, in a hot press molding method in which a sheet is placed in a mold and the mold is heated and pressed to be deformed, the shape of the molded article is stable and / or the surface of the molded article A high-quality molded product can be obtained.

  Although the sheet | seat which laminated | stacked the resin layers 20 and 22 on the both surfaces was demonstrated as a specific example of the workpiece 14 like FIG. 6 at the center, the sheet | seat on which the several resin sheet was laminated | stacked, or a fiber layer As an example, a sheet including By heating the resin layer on the surface side beyond the melting point and quenching after molding, the surface can be glossed and the quality of the molded product can be improved. Further, by providing a temperature difference at the time of molding with respect to the front and back resin sheets, it becomes possible to control the warpage of the molded product by utilizing the expansion / contraction difference.

  By applying the hot press molding method of the present invention to the hot bending molding of a sheet, the shape of the molded product can be stabilized and a high-quality molded product can be obtained, and the quality of various molded products can be improved. Contribute.

DESCRIPTION OF SYMBOLS 1 1st metal mold 2 2nd metal mold 4 Temperature control device 5 Cooling water control device 6 1st temperature control zone 7 2nd temperature control zone 8 3rd temperature control zone 9 4th temperature control zone 10 5th temperature control zone 11 6th temperature control zone 12 7th temperature control zone 13 8th temperature control zone 14 Work material 15 Molded products 16a and 16b Heaters 17a and 17b Temperature sensors 18a and 18b Cooling water pipe 19 Cooling water valve 20 Resin layer 21 Fiber layer 22 Resin layer

Claims (10)

An arrangement step of arranging a workpiece between a first mold having a convex shape and a second mold having a concave shape;
Contacting the first and second molds so that the convex apex of the first mold and the workpiece are in contact with each other;
A deformation heating step of deforming and heating the workpiece by bringing the heated workpiece toward the bottom dead center with respect to the heated second mold;
A cooling step of cooling the first mold and the second mold to cool the workpiece;
A step of taking out a molded product in which molding of the workpiece, which has been molded by separating the first mold and the second mold, is completed,
The hot press molding method, wherein a temperature of a contact surface of the first mold with the workpiece in the deformation heating step is lower than a temperature of a contact surface of the second mold with the workpiece.   2. The hot press molding method according to claim 1, wherein heating and cooling of the first mold and the second mold are performed separately for each of a plurality of temperature control zones.   The hot press molding method according to claim 2, wherein the number of temperature control zones of the first mold having a convex shape is smaller than the number of temperature control zones of the second mold having a concave shape. . The contact step includes
The heating of the first mold is stopped after the workpiece is in contact with the first mold, and the heating is stopped for each temperature control zone in the order of contact. The hot press molding method according to claim 2, wherein heating is stopped for each of the temperature control zones in order from the contacting end portion, and the heating energy input to the sheet surface is made uniform. The deformation heating step includes
The temperature is controlled to a predetermined temperature for each temperature control zone at the start of pressure compression, and the second mold or the first mold is heated to the melting point of the workpiece or cooled after being heated and compressed. The hot press molding method according to claim 2, wherein:   The hot press molding method according to claim 2, wherein the cooling step starts cooling the first mold before the second mold. The cooling step includes
In the first mold and the second mold, while cooling each mold, heating is turned on and off at the same time for each zone, thereby maintaining a predetermined temperature during cooling and a constant cooling rate. The hot press molding method according to claim 6, wherein the hot press molding method is performed by cooling. A first mold having a convex shape and a second mold having a concave shape;
The temperature of the contact surface of the first mold with the workpiece when the workpiece is deformed and heated with the second mold heated to approach the bottom dead center. A temperature control device for controlling the temperature so as to be lower than the temperature of the contact surface of the workpiece of the second mold,
Hot press molding equipment.   9. The hot press molding apparatus according to claim 8, wherein heating and cooling of the first mold and the second mold by the temperature control device are individually performed in a plurality of zones.   The hot press molding apparatus according to claim 9, wherein the number of zones of the first mold is smaller than the number of zones of the second mold.