JP2007105968A - Molding machine and molding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molding machine and molding method which produces a molding with a more uniform plate thickness. <P>SOLUTION: The molding machine 10 has a temperature control means which forms a temperature distribution prescribed on the basis of a time required from the start of pressurization/deformation to adhesion to a molding surface 20 in a sheet material 1 before the sheet material 1 is pressurized. A part of a long time required from the start of the pressurization/deformation to the adhesion to the molding surface 20 in the sheet material, in comparison with a part of a short time required to the adhesion, in the initial step of a pressurization/deformation process, forms the temperature distribution in the sheet material 1 to reduce the speed of elongation/deformation. In this way, the quantity of the elongation/deformation from the time of the start of the pressurization/deformation at the time of the adhesion to the molding surface 20 is made equivalent to that of the part of a short time required for the adhesion. In other words, the plate thickness of the sheet material 1 after molding is made uniform. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a molding apparatus and a molding method for molding a heated sheet-shaped member by applying pressure to the mold so as to be in close contact with the mold.

  Conventionally, there is a compressed air molding method (hereinafter, referred to as a pressure air molding method) as one of molding technologies for obtaining a molded product using a mold. In the pressure forming method, a thermoplastic sheet-like member (hereinafter referred to as a sheet material) is heated and softened, and this is pressed by a compressed gas and adhered along the molding surface of the mold. This is a processing method for obtaining a molded product of the shape. It is the same as the vacuum forming method in that the heated sheet material is subjected to pressure and thermoformed, but in the case of the vacuum forming method, the pressure difference between the reduced pressure and the atmospheric pressure becomes the forming pressure. Whereas it is difficult to apply a molding pressure of 1 MPa or more, in the case of the compressed air molding method, sometimes a molding pressure of 1 MPa or more can be applied to the surface of the sheet material. For this reason, it is possible to obtain a molded product that is more faithful to the mold, and is particularly suitable for molding a deep-drawn molded product, that is, a so-called deep product.

  The pressure forming process is as follows. First, a thermoplastic sheet material is placed on a mold having a molding surface shaped like the outer shape of a molded product. Above the sheet material is provided a lid-like member (hereinafter referred to as an upper lid) that is movable in the vertical direction, and the peripheral portion of the sheet material is sandwiched between the edge of the upper lid and the edge of the mold. . Then, the sheet material sandwiched between the mold and the upper lid is heated and softened by a heater embedded in the mold. Furthermore, pressure is applied to the sheet material by blowing pressurized gas into a space sealed by the sheet material and the upper lid. By this pressure, the sheet material is stretched and deformed, and is brought into close contact with the molding surface of the mold. In this way, a molded product having a desired shape is obtained.

  In such a step of deforming and adhering the sheet material, the time required for the sheet material to adhere to the molding surface of the mold varies depending on each part of the sheet material. A portion that is in close contact with the molding surface in a relatively short time, for example, a portion that is in close contact with the substantially central portion of the cavity, has an extremely small amount of elongation deformation (strain) thereafter due to friction with the molding surface. On the other hand, a portion that adheres to the molding surface after a relatively long period of time, for example, a portion that adheres to the corner of the molding surface, continues to elongate for a longer time than a portion that adheres to the molding surface in the short time described above. Therefore, the amount of deformation becomes large. For this reason, the thickness of the sheet material after molding, that is, the thickness of the molded product, becomes non-uniform depending on the time required for adhesion to the molding surface described above, and in particular, it takes a relatively long time such as the corner of the molding surface. This causes a problem that the thickness of the portion in close contact with the molding surface is reduced. Therefore, there is a demand for a molding technique capable of producing a molded product having a more uniform plate thickness.

  As a forming technique for making the sheet thickness of the sheet material after forming as described above more uniform, for example, a technique described in JP-A-1-133617 has been proposed. In this conventional technique, the periphery of the corner formed on the molding surface of the mold is controlled so as to be higher in temperature than the other parts, so that the processed plate (sheet material) that is in close contact with this part has a higher temperature. Making it easier to deform. The sheet material that is in close contact with the surrounding part is stretched and deformed, so that the deformation is not concentrated at the corner part, and the thickness of the part that is in close contact with the corner part is prevented from becoming thinner than the surrounding area. is doing. However, since the amount of elongation deformation of the sheet material after being in close contact with the molding surface of the mold becomes extremely small due to friction generated between the mold material and the sheet material on the molding surface of the mold as described above, Sufficient elongation deformation cannot be obtained only by heating the adhered part.

  Then, this invention aims at providing the shaping | molding apparatus and method which can manufacture the molded product of a more uniform board thickness.

  The molding apparatus of the present invention comprises a temperature control means for forming a temperature distribution determined on the basis of the time required from the start of pressure deformation to the close contact with the molding surface before the sheet material is pressed. Have. The temperature control means forms a temperature distribution so that the temperature of each part of the sheet material varies depending on the length of time it takes for each part of the sheet material to start contacting with the molding surface after the pressure deformation starts. To do.

  Of the sheet material, the temperature of the sheet material is set so that the portion that takes a long time from the start of pressure deformation to the close contact with the molding surface has a lower elongation deformation speed than the portion that takes a short time to contact. By forming the distribution, the amount of elongation deformation from the start of pressure deformation at the time of close contact with the forming surface is made equal to the portion where the time required for close contact is short, that is, the sheet thickness of the sheet material after forming is reduced. It can be uniform.

  Preferably, the temperature control unit includes a cooling unit that cools a portion of the heated sheet material that takes a long time from the start of pressure deformation to the close contact with the forming surface.

  Preferably, the cooling unit includes a cooling surface that contacts and cools a predetermined portion of the sheet material, and a cooling pipe that circulates the refrigerant inside and radiates heat conducted from the cooling surface to the refrigerant. .

  The molding method of the present invention includes a step of heating a sheet material, and a temperature control step of forming a temperature distribution determined on the basis of the time required from the start of pressure deformation to the close contact with the molding surface of the sheet material. And a pressure-deformation step in which the sheet material is pressurized to be stretch-deformed and closely adhered along the molding surface of the mold. In the temperature control process, the temperature distribution is formed in the sheet material, so that in the initial stage of the subsequent pressure deformation process, each portion of the sheet material has a different elongation deformation speed (strain speed) depending on the temperature. Make it.

  In the pressure deformation process, the temperature of each part of the sheet material is varied in advance in the temperature control process according to the length of time required for each part of the sheet material to adhere to the molding surface, that is, the temperature distribution is changed to the sheet. By forming the sheet material, the amount of elongation deformation from the time when pressure deformation starts when each part of the sheet material comes into close contact with the molding surface, that is, the thickness of the sheet material after molding is made more uniform. Can do.

  According to the compressed air molding technique of the present invention, the plate thickness after molding can be made more uniform, and a thinned portion can be prevented from occurring in a molded product.

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

  First, a sheet-like member (hereinafter, referred to as a sheet material) to be processed by the molding apparatus of the present embodiment and to which a molding method is applied will be described. The sheet material 1 is a plate-like member having a thickness of about 0.8 to 2 mm having thermoplasticity, and a 5000 series aluminum alloy is adopted as the material. The aluminum alloy has a property of becoming a so-called “superplastic state” in which the ductility is remarkably improved under a predetermined stress by heating to 400 to 500 ° C. By molding the aluminum alloy sheet material 1 using this characteristic, a molded product having a light and deep shape, such as an automobile fender or a trunk lid, can be realized.

  The structure of the shaping | molding apparatus 10 of this embodiment is demonstrated using FIG.1 and FIG.2. FIG. 1 shows a cross section of the molding apparatus 10, and FIG. 2 shows a perspective view of a cooling iron part 12 that is a component of the molding apparatus 10. As shown in FIG. 1, the forming apparatus 10 includes a mold 14 that is formed by closely attaching the sheet material 1, an upper lid 16 that sandwiches the sheet material 1 together with the mold 14, and a cooling iron portion 12 that cools the sheet material 1. And have.

  The mold 14 has a cavity 18 formed by digging up substantially at the center, and a molding surface 20 having a shape imitating the outer shape of the molded product is formed inside the mold. The sheet material 1 is molded in close contact along the molding surface 20. Further, a discharge nozzle 22 for discharging the gas in the cavity 18 out of the mold 14 is provided from the molding surface 20 of the mold 14. The discharge nozzle 22 discharges the compressed gas surrounded by the sheet material 1 and the molding surface 20 to the outside as indicated by an arrow B when the sheet material 1 is in close contact with the molding surface 20.

  A plurality of heaters 24 are embedded in the mold 14, and heat generated by the heaters 24 is conducted to the entire mold 14. The heater 24 can be composed of a thermoelectric element or the like, and the temperature of the mold 14 can be freely controlled. Around the molding surface 20 of the mold 14, there is an opening edge 14a of the cavity 18, and the unprocessed sheet material 1 is disposed thereon. Heat generated by the heater 24 is transmitted from the opening edge 14a of the mold 14 to the sheet material 1 or radiated from the mold 14, and the sheet material 1 is heated.

  On the other hand, the upper lid 16 is provided vertically above the mold 14 and is formed in a lid shape that fits the opening edge 14 a of the mold 14. The upper lid 16 is fixed to a platen (pressure plate) (not shown) and is movable in the vertical direction (indicated by an arrow Z). By moving the upper lid 16 vertically downward toward the mold 14, the edge portion 16 a of the upper lid 16 moves the peripheral portion 1 a of the sheet material 1 arranged on the mold 14 together with the opening edge portion 14 a of the mold 14. Sandwich. As a result, the peripheral portion 1 a of the sheet material 1 is sandwiched between the mold 14 and the upper lid 16. Further, a heater is provided inside the upper lid 16 in the same manner as the mold 14, and the sandwiched sheet material 1 together with the heater of the mold 14 can be heated to 500 ° C., for example.

  A supply nozzle 28 that blows gas into the upper lid 16 is provided at the approximate center of the upper lid 16. By supplying gas from the supply nozzle 28 to the upper lid inner side 30 as indicated by an arrow A, the space 32 sealed with the upper lid 16 and the sheet material 1 sandwiched around the upper lid 16 can be boosted. Thereby, pressure can be applied to the sheet material 1 from the space 32 in the upper lid inner side 30, and the sheet material 1 can be deformed toward the molding surface 20. The gas blown from the supply nozzle 28 is air or an inert gas such as nitrogen gas.

  Further, the upper lid 16 is provided with a cooling iron portion 12 that cools a predetermined portion of the sandwiched sheet material 1. The cooling iron part 12 is fixed to the ceiling 34 on the inner side of the upper lid 30, and a cooling iron surface 36 that abuts against the sheet material 1 is formed on the vertical lower side thereof. The cooling iron surface 36 is formed on substantially the same plane as the edge 16 a of the upper lid 16. Therefore, in a state where the upper lid edge portion 16a sandwiches the peripheral portion 1a of the sheet material 1, the cooling iron surface 36 is formed on a predetermined portion of the sheet material 1 that is a cooling target (hereinafter referred to as a cooling target portion). Contact from the side. The shape of the cooling iron surface 36 is formed according to the shape of the portion 1b to be cooled of the sheet material 1 that is required to be cooled. The cooling iron portion 12 absorbs heat from the cooling target portion 1 b of the sheet material 1 that is heated and has a high temperature via the cooling iron surface 36. As described above, the cooling iron part 12 can form a temperature distribution in the sheet material 1 by cooling the cooling target portion 1b of the heated sheet material 1.

  A cooling pipe 38 through which the coolant circulates is provided in the cooling iron part 12. The heat absorbed by the cooling iron surface 36 from the cooling target portion 1b of the sheet material 1 is transmitted from the cooling pipe 38 to the coolant flowing through the pipe. As shown in FIG. 2, the cooling pipe 38 is formed to meander inside the cooling pipe portion 12 according to the shape of the cooling iron portion 12. The coolant circulating in the cooling pipe 38 is supplied from the outside of the upper lid 16, and the coolant that has flowed through the cooling iron portion 12 and has reached a high temperature is returned to the outside of the upper lid 16 again. By adjusting the temperature of the coolant circulating in the cooling pipe 38 and the flow rate per time, the cooling iron part 12 is controlled to have a desired temperature. Thereby, the cooling iron part 12 can cool the cooling object part 1b of the heated sheet material 1 to a desired temperature. The temperature of the coolant circulating in the cooling pipe 38 is appropriately set from room temperature to 300 ° C. so that the cooling target portion 1b of the sheet material 1 is cooled to a desired temperature.

  As described above, in the molding apparatus 10 of the present embodiment, the cooling iron portion 12 cools the predetermined cooling target portion 1b in the heated sheet material 1. Thereby, it is possible to form a temperature distribution on the sheet material 1 before the sheet material 1 is pressed.

  When the sheet material 1 having a substantially uniform temperature is pressed and deformed without forming a temperature distribution as in the prior art, the sheet material 1 is in close contact with the molding surface 20 after a relatively long time has elapsed. As compared with the portion that is in close contact with the molding surface 20 in a relatively short time, there is a problem that the elongation deformation amount from the start of pressure deformation at the completion of molding is large and the plate thickness is reduced.

  Therefore, the molding apparatus 10 of the present embodiment forms the temperature distribution on the sheet material 1 according to the length of time required from the start of pressure deformation to the close contact with the molding surface 20, thereby adding the sheet material 1. In the step of pressure deformation, the speed of elongation deformation is varied. With respect to a portion that adheres to the molding surface 20 after a relatively long time such as a corner of the molding surface 20, the rate of elongation deformation at the time of pressure deformation is suppressed compared to a portion that adheres in a relatively short time. As described above, by forming a temperature distribution in the sheet material 1 in advance, the amount of elongation deformation from the start of pressure deformation at the time of completion of molding is made equal to the portion that is in close contact with the molding surface 20 in a relatively short time. Can do. Therefore, the plate thickness after completion of molding can be made more uniform.

  Next, the shaping | molding method using the shaping | molding apparatus 10 of this embodiment is demonstrated using FIGS. 3 to 7 are cross-sectional views showing in time series how the sheet material 1 is formed by the main forming process. FIG. 3 shows a state at the start of the forming process, and FIG. 7 shows the forming process. Indicates the completed state.

  First, the sheet material 1 is disposed on the mold 14, and the upper cover 16 is moved to sandwich the sheet material 1. As shown in FIG. 3, the peripheral portion 1 a of the flat sheet material 1 is sandwiched between the opening edge portion 14 a and the upper lid edge portion 16 a of the mold 14. At this time, the mold 14 and the upper lid 16 are heated to 400 to 500 ° C. by the heaters 24 and 26 respectively provided therein, and this heat is transferred from the mold opening edge portion 14 a and the upper lid edge portion 16 a to the sheet material 1. The sheet material 1 is heated by being transmitted or radiated from the mold 14 to the sheet material 1.

  Further, at the same time as the upper lid 16 sandwiches the sheet material 1, the cooling iron surface 36 comes into contact with the cooling target portion 1 b of the sheet material 1. While the sheet material 1 is heated or after the sheet material 1 is heated, the cooling liquid is circulated in the cooling pipe 38 to cool the portion 1b to be cooled of the sheet material 1. The cooled cooling target portion 1b has a lower temperature than the other portions, and the portion of the sheet material 1 that is closer to the cooling target portion 1b has a lower temperature. That is, a temperature distribution is formed in the sheet material 1 such that the temperature becomes lower toward the cooling target portion 1b. In the molding technique of the present embodiment, the position and shape of the cooling iron surface 36 in contact with the sheet material 1 are adjusted. In addition, the temperature of the heaters 24 and 26, the temperature of the coolant circulating in the cooling iron portion 12, and A desired temperature distribution is formed on the sheet material 1 by controlling the circulation flow rate per unit time of the coolant.

  In such a temperature control step, the temperature distribution formed on the sheet material 1 is determined based on the time required from the start of pressure deformation of the sheet material 1 described later to the close contact with the molding surface 20. The temperature of each part of the sheet material 1 is controlled to be different depending on the length of time required for each part of the sheet material 1 to start being pressed and deformed and to be in close contact with the molding surface 20. In other words, the temperature of the sheet material 1 is controlled so that the portion that takes longer to adhere to the molding surface 20 has a lower temperature.

  Note that the time required from the start of pressure deformation to the close contact with the molding surface 20, the position and shape of the cooling iron surface 36, the temperature of the coolant, and the circulation flow rate in each part of the sheet material 1 are limited in advance. Appropriate values obtained by simulations such as analysis methods and trial production using actual products are set.

  Next, by supplying gas from the supply nozzle 28 and pressurizing the space 32 sealed with the upper lid 16 and the sheet material 1, the sheet material 1 receiving the pressure is applied to the molding surface 20 as shown in FIG. 4. Start deformation. Hereinafter, the deformation of the sheet material 1 under pressure is referred to as “pressure deformation”. At this point, the portion that is far from the cooling target portion 1b, that is, the portion that is higher in temperature than the low-temperature cooling target portion 1b, greatly expands and deforms. For example, in the case of the present embodiment, the substantially central portion 1c of the sheet material 1 is the portion having the highest temperature and is greatly stretched and deformed. Such a portion having a large elongation deformation has a reduced thickness according to the deformation. On the other hand, the cooling target portion 1b that has been cooled to a low temperature is suppressed from being stretched and deformed as compared with the above-described portion having a high temperature. The part near the central part 1c of the sheet material 1 in the cooling target part 1b is only slightly bent and deformed, and the thickness of the cooling target part 1b is not thinned. In the portion to be cooled, the temperature of the portion that is bent and deformed and separated from the cooling iron surface rises due to heat conduction from the central portion 1c side.

  Then, when the pressure deformation of the sheet material 1 proceeds, as shown in FIG. 5, the substantially central portion 1 c where the temperature of the sheet material 1 is high reaches the molding surface 20 and comes into close contact therewith. The substantially central portion 1c that is in close contact with the molding surface 20 is restrained from being stretched and deformed by friction with the molding surface 20 at a later point in time, and the plate thickness is hardly reduced. On the other hand, the temperature of the portion 1b to be cooled has increased due to heat conduction from the higher temperature portion of the sheet material 1, and has started to be slightly extended and deformed. In the part 1b to be cooled, the central part 1c side where the temperature is higher is elongating and deforming, and the plate thickness is accordingly reduced.

  In the initial stage of the pressure deformation process as described above, the portions of the sheet material 1 have different elongation and deformation speeds according to the formed temperature distribution. In the portion of the sheet material 1 that has become low temperature, elongation deformation is suppressed compared to the portion in which the temperature is high. The temperature distribution formed on the sheet material 1 in the temperature control step is gradually leveled with the passage of time from the start of processing deformation due to heat conduction between the portions of the sheet material 1 and radiation of heat from the mold 14. It will become. As the temperature distribution of the sheet material 1 is leveled, the rate of elongation deformation in each portion of the sheet material 1 becomes more uniform.

  Further, when the pressure deformation of the sheet material 1 proceeds, as shown in FIG. 6, most of the sheet material 1 is formed except for the portion to be cooled 1 b, that is, the portion that closely contacts the corner of the forming surface 20. It adheres to the surface 20. On the other hand, the portion 1b to be cooled, which is in close contact with the corner of the molding surface 20 at a later time, is sufficiently hot due to heat conduction from the surroundings, but is more pressurized than the portion in close contact with the molding surface 20. The amount of elongation deformation from the start of deformation is small, and the plate thickness is kept thicker than the portion in close contact with the molding surface 20. Thereafter, the portion 1b to be cooled further expands and deforms and the plate thickness decreases.

  Finally, as shown in FIG. 7, all parts of the sheet material 1 are in close contact with the molding surface 20, and the molding process is completed. At the time when this processing is completed, the amount of elongation deformation from the start of processing deformation in the portion 1b to be cooled that is in close contact with the corner of the forming surface 20 is the amount of elongation deformation in other portions that are in close contact with the forming surface 20, for example, the central portion 1c of the sheet material. It is almost the same as the amount. That is, the sheet thickness of the sheet material 1 that is in close contact with the molding surface 20 is uniform.

  As described above, the molding technique of the present embodiment has a temperature distribution determined based on the time required from the start of pressure deformation to the close contact with the molding surface 20 before the sheet material 1 is pressed. The sheet material 1 is formed. That is, the temperature of each part of the sheet material 1 is made different according to the length of time required for each part of the sheet material 1 to start contacting with the forming surface 20 after the pressure deformation starts. For example, the temperature of the sheet material 1 is controlled so that the portion that takes longer to adhere to the molding surface 20 has a lower temperature. Specifically, the cooling iron part 12 is brought into contact with the cooling target portion 1b of the sheet material 1 to be cooled.

  In this way, in the initial stage of the process of pressurizing and deforming the sheet material, the elongation deformation speed (distortion speed) of each part of the sheet material is varied. For example, in the case of an aluminum alloy sheet material of 5000 series or the like, in a cooled portion having a low temperature, elongation deformation is suppressed, that is, a strain rate is reduced as compared with a portion having a high temperature. Utilizing such properties of the sheet material, the molding technique of the present embodiment is such that the part of the sheet material that takes a long time from the start of pressure deformation to the close contact with the molding surface is shorter than the short part. A temperature distribution is previously formed in the sheet material in the temperature control step so that elongation deformation in the initial stage of the pressure deformation step is suppressed.

  This makes it possible to make the amount of elongation deformation from the time when pressure deformation starts at the time when the portion required for close contact with the molding surface is in close contact with the molding surface equal to the portion where the time required for contact is short. . That is, the sheet thickness of the sheet material that is in close contact with the molding surface at the time of molding completion, that is, the sheet material after molding can be made more uniform. As a result, it is possible to prevent a thinned portion from occurring in the molded product.

  The sheet material to which the forming technique of the present invention is applied is not limited to the above-described aluminum alloy. Any sheet material that has thermoplasticity and whose elongation deformation (strain rate) changes depending on the temperature may be used, as well as 2000-series and 7000-series aluminum alloy sheet materials, and other alloys such as titanium alloys. The molding technique of this embodiment can also be applied to a sheet material or a resin sheet material.

  Further, the temperature control means of the present invention is not limited to the configuration having the “cooling unit for cooling the portion to be cooled of the heated sheet material” of the present embodiment. For example, by providing a heater for heating each part of the sheet material on the upper lid side and controlling the temperature of each heater separately, the temperature of each part of the sheet material may be varied to form a temperature distribution.

  Further, the cooling unit of the present invention is not limited to the configuration having the “cooling surface in contact with the portion to be cooled of the sheet material” of the present embodiment. For example, it is good also as a structure which sprays the liquid whose boiling point is higher than the heating temperature of a sheet material on a sheet material, and cools the cooling object part of the heated sheet material.

It is the schematic which shows the structure of the shaping | molding apparatus of this embodiment. It is a perspective view of the cooling iron part in the shaping | molding apparatus of this embodiment. It is sectional drawing which shows a mode that a sheet | seat material is shape-processed by the shaping | molding technique of this embodiment in time series, and is a figure which shows the state before a sheet | seat material is a pressure deformation at the time of the start of a shaping | molding process. It is sectional drawing which shows a mode that a sheet material is shape-processed with the shaping | molding technique of this embodiment in time series, and is a figure which shows the state by which the pressure deformation of the sheet material was started. It is sectional drawing which shows a mode that a sheet | seat material is shape-processed by the shaping | molding technique of this embodiment in time series, and is a figure which shows the state which the approximate center part of the sheet | seat material contact | adhered to the molding surface. It is sectional drawing which shows a mode that a sheet | seat material is shape-processed by the shaping | molding technique of this embodiment in time series, and is a figure which shows the state which the sheet | seat material contact | adhered except the corner part of the molding surface. It is sectional drawing which shows a mode that a sheet material is shape-processed by the shaping | molding technique of this embodiment in time series, and is a figure which shows the state which all the sheet | seat materials contact | adhered to the forming surface and the forming process was completed.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Sheet | seat material, 1a Peripheral part of a sheet | seat material, 1b The part to be cooled of a sheet | seat material, 1c The substantially center part of a sheet | seat material, 10 Molding apparatus, 12 Cooling iron part, 14 Mold, 16 Top lid, 20 Molding surface, 24,26 Heater, 32 sealed space, 36 cooling iron surface, 38 cooling piping.

Claims (4)

A molding apparatus that pressurizes and deforms a sheet material that is sandwiched and heated by a fluid and closely adheres along a molding surface of a mold,
A molding apparatus, comprising: temperature control means for forming, on the sheet material, a temperature distribution determined based on the time required from the start of pressure deformation to the close contact with the molding surface before the sheet material is pressurized. The molding apparatus according to claim 1,
The temperature control means has a cooling unit that cools a portion of the heated sheet material that takes a long time from the start of pressure deformation to the close contact with the molding surface,
Molding equipment. The molding apparatus according to claim 2,
The cooling part
A cooling surface that contacts and cools a predetermined portion of the sheet material;
A cooling pipe through which the refrigerant circulates and dissipates the heat conducted from the cooling surface to the refrigerant;
Having
Molding equipment. A molding method in which a sheet material sandwiched and heated is deformed by pressurization with a fluid, and is closely adhered along a molding surface of a mold,
Heating the sheet material;
Of the sheet material, a temperature control step for forming a temperature distribution on the sheet material, which is determined based on the time required from the start of pressure deformation to the close contact with the molding surface, and
A pressure deformation process in which the sheet material is pressurized and stretch-deformed, and closely adhered along the molding surface of the mold;
Having
Molding method.

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