JP2019098544A - Powder slush molding machine - Google Patents

Abstract

To provide a powder slush molding machine equipped with an electric heater element, the machine being capable of reducing environmental load by suppressing use of hydrocarbon gas and generation of carbon dioxide gas, etc.SOLUTION: A powder slush molding machine of this invention comprises: a mold heating section that heats a mold; a powder slush section that performs powdering of molding resin to an inner surface of the mold heated by the mold heating section and molds a sheet-like component; a mold cooling section that cools the mold subjected to the powdering in the powder slush section; and a molding removal section that removes the sheet-like component from the mold cooled in the mold cooling section. The mold heating section includes an electric heater element for heating the mold.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a powder slush molding machine. In particular, a mold placed within the heating and electric furnace by means of a heating and electric furnace equipped with an electric heating element that generates heat due to the electric current processing without generating exhaust gas that causes environmental deterioration virtually quickly The present invention relates to a powder slush molding machine capable of heating uniformly.

Conventionally, powder resin powder (molding using a powder slush molding machine provided with a powder slush portion and a mold cooling portion in producing a sheet-like material having a large size and a complicated shape such as an interior material of a car Resin) slush molding Powder slush molding is widely practiced.
In such a powder slush molding machine, it has been desired to heat the mold uniformly and sufficiently in order to make the thickness of the sheet-like material uniform.
Therefore, in a conventional powder slush molding machine using only a hot-air gas heating method, convection is performed mainly by using a gas burner made of hydrocarbon gas as a heat source and blowing hot air generated by a blower fan toward a mold. Mainly, the entire mold was uniformly heated (see, for example, Patent Document 1).
Furthermore, in the conventional powder slush molding machine, only hot air gas heating method is adopted, and the mold heating can be efficiently performed in a shorter time by devising the exhaust method, the shape of the mold, etc. It was intended (see, for example, Patent Documents 2 and 3).

Unexamined-Japanese-Patent No. 6-335933 gazette JP 2002-210761 A JP, 2010-214645, A

However, in any of the powder slush molding machines described in Patent Documents 1 to 3, in order to heat the mold to a more rapid and uniform temperature as the mold is enlarged or deformed, gas may be used. There has been a problem that the output of the burner and the blow becomes large and, in turn, a large amount of hydrocarbon gas (LPG etc.) is required.
Therefore, by burning such hydrocarbon gas, a large amount of exhaust gas such as carbon dioxide (CO ₂ ) and carbon monoxide (CO) is emitted, which not only increases the manufacturing cost but also causes environmental deterioration. There were further problems and problems leading to global warming.

Therefore, the present invention has been made to solve such problems, and it is an electric heating element that generates heat in a mold heating unit by energization processing, and at least a heat resistant member is provided on the back side. By providing a heating element, it is found that even if the mold is enlarged or deformed, radiation heat etc. can heat the mold to a predetermined temperature in a short time and economically, and the present invention is completed. It is
That is, the present invention rapidly and economically heats the mold by using an electric heating element that generates heat by energization processing in the mold heating portion, and further, the use of hydrocarbon gas and generation of exhaust gas are realized. An object of the present invention is to provide a powder slush molding machine capable of suppressing global warming.

According to the present invention, a mold heating unit for heating a mold, and a powder slush portion for forming a sheet by powdering molding resin on the inner surface of the mold heated by the mold heating unit A mold cooling unit for cooling a mold after powdering at a powder slush section, and a mold removal unit for removing a sheet from the mold cooled in the mold cooling unit; According to the present invention, there is provided a powder slush molding machine characterized in that the mold heating unit comprises an electric heating element having a heat resistant member at least on the back side, and the above-mentioned problems can be solved.
That is, by configuring the powder slush molding machine in this way, even when the gas heating furnace is substantially omitted, the mold heating unit is an electric heating element that generates heat by energization processing, and heat resistance Even if the mold is enlarged or deformed by providing the electric heating element having the member at least on the back side, the mold is heated to a predetermined temperature for a short time and economically by radiant heat etc. Can do.
Therefore, the mold can be heated to a predetermined temperature quickly and uniformly while suppressing the generation of exhaust gas such as carbon dioxide gas leading to environmental warming and the like.

Moreover, when constructing the powder slush molding machine of the present invention, it is preferable that a plurality of electric heating elements be arranged in a pattern.
In this manner, a plurality of electric heating elements are arranged in a predetermined pattern, for example, in a zigzag, linear, wavy, matrix, or outer shape of a heating mold when viewed from above. As a result, the mold can be heated more quickly and uniformly.

Moreover, when constructing the powder slush molding machine of the present invention, it is preferable that the heat-resistant member of the electric heating element is constructed of stainless steel or aluminum alloy.
If it is these constituent materials, not only high heat resistance (for example, 500 N / mm ² or more in tensile strength at 500 ° C) but also less occurrence of thermal distortion, the powder slush molding machine is operated continuously. Also, the occurrence of cracks can be effectively suppressed.
Moreover, with these constituent materials, the reflection efficiency of infrared rays is high, the heat can be easily dissipated in one direction which is the front surface, and the mold can be heated more quickly and uniformly.

Moreover, when constructing the powder slush molding machine of the present invention, it is preferable that the electric heating furnace main body provided in the mold heating unit has a semi-cylindrical shape in which both end surfaces are closed.
With such a dome-shaped electric heating furnace main body, not only it is excellent in heat resistance and mechanical strength, but also the infrared rays emitted from the electric heating element are appropriately reflected, and the inner surface of the mold can be further quickly and uniformly. Can be heated to a predetermined temperature.

Further, when configuring the powder slush molding machine of the present invention, a mount for mounting the mold is provided below the electric heating furnace main body provided in the mold heating unit, and the periphery of the mount (the lower In addition to the electric heating element (first electric heating element) provided in the electric heating furnace main body, another electric heating element (second electric heating element) may be provided. preferable.
Thus, using the infrared rays emitted from the electric heating elements (the first electric heating element and the second electric heating element) provided on both sides, the mold placed on the gantry is viewed from both sides or the like. By heating, it is possible to achieve the predetermined temperature more quickly and uniformly.

Moreover, when comprising the powder slush molding machine of this invention, it is preferable that the circumference | surroundings of a die heating part are coat | covered with a heat insulating material.
By configuring the powder slush molding machine in this manner, the electric heating furnace main body included in the mold heating portion or the periphery thereof is formed of a heat insulating material, so that the mold can be further quickly and uniformly made by the electric heating element. The inner surface of can be heated to a predetermined temperature.

In another embodiment of the powder slush molding machine according to the present invention, the inner surface of the heated mold is produced by powdering and blowing a molding resin while heating the mold with at least an electric heating element. A powder slush portion for forming a sheet of a predetermined thickness, a mold cooling portion for cooling the mold such that the temperature of the mold is equal to or less than a predetermined temperature, and the cooled sheet A powder slush molding machine comprising: a mold processing unit for removing a mold; and a transfer device for moving the mold between the respective parts, the electric heat being provided in the mold heating unit The inner surface of the furnace body is provided with an electric heating element having a heat resistant member at least on the back side, and at least a mold heating unit and a mold cooling unit are arranged radially around the transfer device. Powder slurs characterized by A Interview molding machine.
By configuring the powder slush molding machine in this manner, the moving time of the mold or the like by the conveying device can be shortened, and in turn, the temperature drop of the mold during conveyance can be effectively prevented.
And, even when the gas heating furnace is substantially omitted, the mold heating unit is provided with an electric heating element that generates heat by energization processing, and has at least a heat resistant member on the back side. Thereby, even if the mold is enlarged or deformed, the mold can be heated to a predetermined temperature in a short time and economically by radiant heat or the like.

In addition, when configuring another powder slush molding machine according to the present invention, the transport device at least includes a grip unit that grips a mold, an arm unit that extends and contracts while gripping a mold, and a rotational operation unit that rotationally drives radially. It is preferable that it is a crane robot provided.
By configuring the transfer device in this manner, the area occupied by the powder slush molding machine can be reduced, and simultaneous processing (heat treatment, cooling treatment, etc.) of a plurality of molds can be easily performed. .

FIG. 1 is a side view provided to explain an example of a powder slush molding machine of the present invention. FIG. 2 is a plan view provided to explain an example of the powder slush molding machine of the present invention. FIG. 3 is a side view provided to explain the transfer device provided with the preheating unit. FIG. 4 is a side view provided to explain an example of a mold heating unit. Fig.5 (a)-(b) is a perspective view which is provided in order to demonstrate an example of an electric heating furnace and an electric heat generating body, respectively. FIGS. 6 (a) to 6 (c) are diagrams provided to explain the molding method by the powder slush molding machine of the present invention (part 1). FIGS. 7 (a) and 7 (b) are diagrams provided to explain the molding method by the powder slush molding machine of the present invention (part 2). FIGS. 8 (a) to 8 (d) are figures provided to explain the molding method by another powder slush molding machine of the present invention.

First Embodiment
According to the first embodiment of the present invention, as illustrated in FIGS. 1 and 2, a mold heating unit (part A) for heating the mold 60 and the mold heating unit (part A) are heated. Powdered molding resin is molded on the inner surface of the mold 60, and the powder slush part (part B) for forming the sheet-like material 94 and the mold 60 after powdering in the powder slush part (part B) are cooled A mold cooling section (C section) and a mold removal section (E section) for removing the sheet-like material 94 from the mold 60 cooled in the mold cooling section (C section); The powder slush molding machine 10 is characterized in that the mold heating portion (A portion) is provided with the electric heating element 52 having the heat resistant member 52b at least on the back side, and the above-mentioned problems can be solved. .

Hereinafter, the powder slush molding machine 10 of the first embodiment will be specifically described with reference to FIGS. 1 to 5 and the like as appropriate.
1 and 2 respectively show a side view and a plan view (conveying device is omitted) of the powder slush molding machine 10.
Also, FIG. 3 shows a mold heating part (A part), a powder slush part (B part), a mold cooling part (C part), a mold replacement part (D part), a mold removal part (E part), etc. FIG. 4 is a side view (in a state where the mold 60 is mounted) of the transfer device 62 provided with the preheating device 63 for repeatedly transferring the mold 60 between the molds, and FIG. It is a figure for demonstrating an example.
Furthermore, FIG. 5 (a) is a view for explaining an example of the electric heating furnace main body 51 in the mold heating portion (part A), and FIG. 5 (b) is for heating the electric heating furnace main body 51. It is a figure for demonstrating the electric heating element 52 which is the electric heating element 52 of this, and has the heat-resistant member 52b and the heat insulation blanket material 54 in the back side, respectively.

1. Basic Configuration The powder slush molding machine 10 shown in FIG. 1 and FIG. 2 assumes that at least four molds 60 (60A, 60B, 60C, 60D) are used, and at predetermined times, mold processing sections ( Part E), preheating part (A 'part), mold heating part (part A), powder slush part (part B), mold cooling part (C), mold replacement part (D), gold again It has a basic configuration in which each part is moved by the transfer device 62 provided with the preheating device 63 shown in FIG. 3 in the order of the die processing part (E part).
Then, in the powder slush molding machine 10, processing for completing a series of powder slush molding is performed in parallel, and finally, a sheet-like material 94 which is a resin molded product can be obtained quickly and stably. .

2. Mold processing department (demolding department)
The die processing portion (E portion) shown in FIG. 1 and the like is a portion for performing a demolding operation for removing the powder slush molded sheet-like material 94 from the die 60.
Therefore, as shown in FIG. 1 etc., the mold 60 is attached to the frame member 61 in order to facilitate movement and rapid processing, and along with the frame member 61, a transfer device (for example, a crane or crane robot) ) 62 is configured to be able to move arbitrarily between predetermined parts, with the mold processing part (part E) as the start point.
More specifically, the transfer device 62 can move arbitrarily in a state in which the mold 60 is held along the arrow F in the horizontal direction and the arrow G in the vertical direction.

3. Preheating Device Also, as shown in FIG. 3, the transfer device 62 is provided with a preheating device 63a and a drive device 63b including a motor / blower as a preheating unit (A ′ portion), While the mold 60 is being transported, the mold temperature can be adjusted to a predetermined temperature.
More specifically, the mold 60 is transferred from the mold processing section (E section) to the mold heating section (A section) by the transport apparatus (for example, a crane) 62, in which case the transport apparatus 62 Preferably, a preheating device 63a for heating at least the outer surface of the mold 60 is provided.

4. Mold Heating Unit (1) Hot Air Generator As shown in FIG. 4, the mold heating unit (A) comprises a hot air generator 40 disposed on the lower side, and an electric heating furnace 50 disposed on the upper side. Is preferred.
The structure of the hot air generator 40 mainly for heating the inner surface of the mold 60 (60D) is not particularly limited as long as the inner surface of the mold 60 can be efficiently heated.
For example, the mold 60 is blown from below with a hot air W (dotted white hollow arrow) generated at a predetermined temperature generated by a hot air generator 40 such as a gas heating furnace, and circulated through the inside of the upper furnace heater cover described later. Is configured to be able to heat uniformly and quickly.

However, although not shown, the mold heating unit (part A) is not only the electric heating furnace (first electric heating furnace) 50 disposed on the upper side, but also the lower side is a predetermined electric heating furnace (second electric heating furnace) Is also a preferred embodiment.
The reason for this is that the arrangement of the hot air generator 40 is completely omitted by arranging the electric heating furnaces (the first electric heating furnace and the second electric heating furnace) up and down, and the mold heating part (part A) is double-sided. It is because it can heat, respectively by the electric furnace of.

Therefore, thereby, generation of exhaust gas derived from hydrocarbon gas can be completely eliminated, and thus, the whole mold 60 can be further rapidly and uniformly, for example, at 250 to 280 ° C. in 80 to 120 seconds. It can be heated.
In addition, the apparatus of the hot air generating apparatus 40 can be omitted, and the apparatus for supplying hydrocarbon gas and fire protection equipment can be virtually eliminated, thus contributing to downsizing and simplification of the powder slush molding machine 10. is there.

  When the electric heating furnaces (the first electric heating furnace and the second electric heating furnace) are disposed at the upper and lower sides, the electric heating element (first electric heating element) provided in the first electric heating furnace and the second electric heating furnace It is also preferable to make substantially the same configuration such as the calorific value of the electric heating element (second electric heating element) to be provided, or the form, output, etc. of the electric heating element corresponding to the form of the mold 60 It is also preferable to make the

(2) Electric heating furnace The electric heating furnace 50 in the mold heating section (A part) is also referred to as an electric heating furnace, but as shown in FIG. It is an apparatus which is arrange | positioned above the lower side electric heating furnace in which the electrical heating element of these was provided, and heats the outer surface etc. of metal mold | die 60 (60D).
Therefore, in consideration of the loading and unloading of the mold 60 (60D), a mount for mounting the mold is provided below the electric heating furnace main body provided in the mold heating portion, It is more preferable that another electric heating element is provided around the electric heating element other than the electric heating element provided in the electric heating furnace main body.

And as shown in FIG. 4, when it sees from a side, it is preferable that the electric heating furnace main body 51 is a form which made the semi-cylindrical shape with which both end surfaces closed.
The reason for this is that such a dome-shaped electric heating furnace main body not only is excellent in heat resistance and mechanical strength, but also reflects infrared radiation emitted from the electric heating element appropriately, and more quickly and uniformly, This is because the inner surface of the mold can be heated to a predetermined temperature.

More specifically, by making the electric heating furnace main body 51 into a closed semi-cylindrical shape at both end surfaces, it is 1/3 to 1/2 compared to the case where the electric heating electric furnace main body 51 is formed into a rectangular shape. It has been separately found that the same electrical heating property can be obtained at the cost of electricity, and consequently, a sheet having a uniform thickness equal to or more than that can be obtained.
Moreover, it is preferable that the electric heating furnace main body 51 be made of a heat resistant material such as an electroformed material so as to be used repeatedly.

The electric heating furnace main body 51 in the electric heating furnace 50 is, as shown in FIG. 5A, provided with a plurality of electric heating elements 52 such as far-infrared ceramic heaters on the inner surface of the electric heating furnace main body 51. It is characterized by being.
Therefore, the electric heating elements 52 are regularly arranged on the entire surface of the semi-cylindrical inner peripheral surface of the electric heating furnace main body 51, and are also arranged in a predetermined pattern on both end surfaces of the electric heating furnace main body 51. Thus, the heat can be radiated toward the inside of the electric heating furnace main body 51 respectively.

That is, the plurality of electric heating elements 52 are arranged in a predetermined pattern, and for example, when viewed from above, they have a zigzag shape, a linear shape, a wavy shape, a matrix shape, and an outer shape of a mold to be heated. By arranging along, the mold can be heated more quickly and uniformly.
The number of electric heating elements 52 can be appropriately changed according to the size of the electric heating furnace main body 51, the area per electric heating element 52, the form of the mold 60 to be heated, etc. The number per unit area is preferably 10 to 50 / m ² , preferably 15 to 40 / m ^2, and more preferably 25 to 35 / m ² .

Further, as shown in FIG. 5 (b), the electric heating element 52 attached to the inner surface of the electric heating furnace main body 51 or the like is a substantially rectangular far infrared ceramic heater or the like, usually by applying a voltage of about 200V. , An infrared ray R (far infrared, mid far infrared, or near infrared).
That is, as the electric heating element 52, for example, a ceramic heater that emits far-infrared radiation with a wavelength of 3 μm to 1 mm, a ceramic heater that emits intermediate far-infrared radiation with a wavelength of 1.5 μm to less than 3 mm, and further, a wavelength of 0.7 μm to 1.5 mm It is preferable to use a ceramic heater or the like that emits near-infrared radiation less than that.
However, a ceramic heater that emits far-infrared rays with a wavelength of 3 μm to 1 mm is more preferable because the heat generation effect is larger and the amount of generation of a predetermined wavelength can be easily controlled.

Then, as shown in FIG. 5 (b), an electric heating element 52 in which the ceramic material is substantially line-shaped and provided with a reciprocating portion and continuously arranged is prepared. It is preferable that a heat-resistant member 52b, for example, a long member (width 40 cm × 2 m) formed of stainless steel or the like, is disposed on the periphery, particularly on the back side.
Therefore, by applying a predetermined voltage from the electrode 52a to the electric heating element 52, far infrared rays are concentrated in one direction (forward direction) while being mechanically and thermally held by the heat-resistant member 52b. (Heat) can be emitted (radiated).
More specifically, the back side of the panel-type electric heating element 52 is covered with a heat-reflecting heat-resistant member 52b, and the cooperative relationship with the frame material provided around the electric heating element 52 is also It is preferable that the heat resistance and the durability of the electric heating element 52 can be improved, and further, infrared rays or the like can be reflected in one direction which is the front surface to easily dissipate heat without waste.

Moreover, if it is the heat-resistant member 52b which consists of a long member formed from stainless steel etc., it will endure thermal expansion and thermal contraction at the time of rise (300-500 ° C) and fall (room temperature -100 ° C) of heating temperature. Can do.
In addition, if the heat-resistant member is a long member, thermal distortion caused by thermal contraction can be released along the length direction, and in turn, the occurrence of cracks can be effectively prevented.
Furthermore, as shown in FIG. 5 (b), the electrode 52a of the electric heating element 52 is exposed on the surface of the heat-resistant member 52b made of a long member, while the connection of the electric wiring with the outside is facilitated. It is preferable to have a predetermined hole (such as a rectangle) 52c for fixing 52a.

As shown in FIG. 5B, the upper side of the heat-resistant member 52b formed of a long member made of stainless steel or the like, that is, between the heat-resistant member 52b and the inner surface of the electric heating furnace main body 51 In order to exhibit a predetermined heat insulation effect, it is preferable to cover with a thick blanket-like heat insulation material.
Such a blanket-like heat insulating material is, for example, silica (60 to 80% by weight), magnesia (10 to 20% by weight), calcia-based (10 to 20% by weight) alkali earth silicate wool (fiber diameter: 1 to 20 μm) ) Is continuously laminated, formed into a blanket shape, and needle-punched. The heat insulation blanket member is 13 to 60 mm in thickness.
Therefore, it is preferable that the heat conductivity of the said heat insulation blanket member is 0.5 W / (m * K) or less in form of 800-1000 degreeC and 130 kg / m < ³ >, 0.35 W / (m * K) It is more preferable that it is the following, and it is still more preferable that it is 0.25 W / (m * K) or less.
Furthermore, the heat shrinkage of the heat insulating blanket member is preferably 5% or less, more preferably 2% or less, and still more preferably 1% or less under heating conditions of 1000 ° C. for 8 hours.

Therefore, for example, a rectangular ceramic heater having an irradiation area of 200 to 1000 mm ² is used as such a panel-type electric heating element 52, and a rated power supply of three phases, 200 V, 30 A is used to A configuration capable of individual heat generation is preferred.
Furthermore, for example, a panel-type ceramic heater that can continuously generate 400 to 600 ° C./one heat with single-phase, 200 V, 400 W power is preferable.
In addition, for example, it is preferable to have a panel-type ceramic heater which can continuously generate 600 to 800 ° C./one heat with a single-phase, 50 V, 690 W power.

And since heat resistance member 52b provided on the back side of such electric heating element 52 is excellent in crack resistance based on temperature difference and high in infrared reflection efficiency, heat resistance such as stainless steel or aluminum alloy is usually used. It is preferable that it is a plate-shaped member which made the main component of the metal.
In contrast, for example, in the case of a heat-resistant member such as a calcium silicate board, although whiteness is high and the reflection efficiency of infrared rays is relatively high, if an excessive temperature difference occurs, cracks due to thermal distortion occur It is because there is a case.

Therefore, as a kind of such a heat-resistant member 52b, more specifically, SUS304, SUS316, an aluminum alloy or the like is preferable.
That is, in the case of a plate-like member mainly composed of a heat-resistant metal such as stainless steel or aluminum alloy, the tensile strength at 500 ° C. is 500 N / mm ² or more, and the crack resistance is at least 10000. Although it withstands heating use of 500 ° C. or more more than once, it has been found that, in the case of a heat-resistant member such as a calcium silicate plate, cracks may occur even if the heating use is performed about 100 times.

Further, as shown in FIG. 4, the electric heating furnace main body 51 may use the transfer device 62, but can rise and fall even using another crane robot or the like.
Therefore, when the mold 60 is transferred to the mold heating unit (A) by the transfer device 62, the electric heating furnace main body 51 is lifted by the lifting device 53, and the mold 60 is placed at a predetermined position. After that, it is lowered by the lifting device 53.
That is, when the electric heating furnace main body 51 is lowered to a predetermined place by the lifting device 53 as described above, the inside is sealed by the lower electric heating furnace or the hot air generator 40 and the electric heating furnace 50 and the outside It becomes an adiabatic state.

As described above, the electric heating furnace 50 has, for example, a plurality of thin far-infrared ceramic heaters having a thickness of 2 to 5 cm on the inner circumferential surface of the electric heating furnace main body 51 as an electric heating element that generates heat by energization processing. It is arranged.
The mold 60 can be rapidly and uniformly heated to a predetermined temperature by heating the mold 60 by emitting infrared light from the electric heating element 52, that is, by radiating heat.
Moreover, compared to a powder slush molding machine which heats the mold only in the gas furnace as in the prior art, the consumption of hydrocarbon gas (such as propane) can be reduced and, consequently, when the hydrocarbon gas is burned. since the carbon dioxide (CO ₂₎ and exhaust emissions such as carbon monoxide (CO) can also be greatly reduced resulting in, it is possible to suppress the environmental degradation such as global warming.

Further, the electric heating furnace 50 has a plurality of electric heating elements 52 arranged in a pattern on the inner surface of the electric heating furnace main body 51 covering the mold 60, so that the electric heating furnace 50 can Infrared rays (R) are emitted from the side, and the whole or any place of the mold 60 can be selected to heat more quickly and uniformly.
Further, the electric heating furnace main body 51 is also made of a heat insulating material such as a casted nickel alloy or stainless steel, thereby heating the mold 60 more efficiently while maintaining the temperature in the electric heating furnace 50 at a high temperature. I can do it.

(3) Mold temperature Further, in the mold heating portion (A part), the mold 60 (for example, 3.5 mm thick nickel casting alloy) is heated using the hot air generator 40 and the electric furnace 50. At this time, it is preferable to set the temperature of the inner surface of the mold 60, that is, the mold temperature, to a value within the range of 220 to 300 ° C., for example.
The reason for this is that when the mold temperature exceeds 300 ° C., the gloss phenomenon caused by the baking phenomenon of the molding resin frequently occurs or cracks occur in the mold at the time of cooling due to metal fatigue of the mold 60 There is
Therefore, for example, it is more preferable to set the mold temperature to a value within the range of 230 to 280 ° C., and it is further preferable to set the mold temperature to a value within the range of 240 to 260 ° C.

And, according to the electric heating element 52 disposed on the inner peripheral surface of the electric heating furnace 50, the surface temperature becomes 200 ° C. in about 30 seconds, depending on the applied voltage and output, and in about 60 seconds, It has been found that the surface temperature is 250 ° C., and the surface temperature is 350-400 ° C. in about 120 seconds, and the surface temperature is 480-500 ° C. in about 180 seconds.
Therefore, although depending on the distance between the electric heating element 52 and the mold 60, the size of the mold, and the like, the mold temperature is, for example, in the range of 220 to 300 ° C. by heat treatment of about 120 seconds. It is possible to adjust stably to the value of.
The temperature of the inner surface of the mold 60 can be measured directly using a thermocouple or the like, or the temperature of the outer surface of the mold 60 can be measured directly using an infrared thermometer or the like. The temperature of the inner surface of the mold 60 can then be estimated and controlled to a value within a predetermined range.

5. Powder slush portion (1) Basic configuration The powder slush portion (B portion) is a gold including a heated frame member 61 as shown in FIGS. 6 (a) to 6 (c) and 7 (a). With the mold 60 (60C) and the reservoir tank 88 containing the powder of liquid material (molding resin) 92, the inner surface of the mold 60 indicated by symbol A is directed downward, and the opening surface of the reservoir tank 88 is It is a site | part for implementing the process of connecting integrally up and down in the state which turned up.

More specifically, the powder slush part which implements a powder slush molding method is demonstrated with reference to FIG. 6 (a)-(c) and FIG. 7 (a).
That is, as shown in FIG. 6A, the mold 60 on which the application layer (not shown) is formed is heated to a predetermined temperature by the hot air W by the hot air generator 40 and the infrared rays R by the electric heating furnace 50. In particular, hot air W is blown to the inner surface of the mold, and infrared rays R are irradiated to the outer surface of the mold to heat the surface to a predetermined temperature.

Next, as shown in FIG. 6 (b), the mold 60 is positioned above the reservoir tank 88 and placed.
Next, as shown in FIG. 6 (c), the mold 60 is rotated together with the reservoir tank 88.
And when rotating these, the dispersibility of the powder 92 accommodated in the inside of the reservoir tank 88 is improved, and in order to form the sheet-like thing 94 of uniform thickness, it provided in the downward direction of the reservoir tank 88. It is preferable to introduce air into the stirring chamber 88a to make the powder 92 flowable.

That is, it is preferable that the upper part of the stirring chamber 88a is formed of a perforated member, for example, a mesh member, and has a structure in which the powder 92 is wound up by the introduced air.
Furthermore, as shown in FIG. 6C, a vibrating member provided on the frame member 61 is used to activate the flow state of the powder 92 and to form a uniform film when rotating. It is preferable to strike repeatedly at the tip portion 108a.

Next, as shown in FIG. 7A, the powder 92 is allowed to settle at a predetermined position by leaving the powder 92 for a predetermined time. At that time, it is preferable to deaerate the air and perform a depressurization operation so that the powder 92 is in a non-flowing state early.
And, as described later, such a powder slush part (part B) is integrated with the mold cooling part (part C), and when the mold is cooled, the cooling device or the like is moved. In the case of the following configuration, the mold is cooled in the powder slush portion / cooling portion.

  That is, finally, as shown in FIG. 7B, the outer surface B of the back side of the mold 60 is used together with the sheet-like material 94 formed on the inner surface A of the mold 60 using the cooling device 55. On the other hand, it is preferable that it is the structure which blows a shower etc. and cools.

  However, if the powder slush part (part B) is independent of the mold cooling part (part C), the mold after powder slush molding is transferred to the mold cooling part (part C) Then, together with the sheet-like material 94 formed on the inner surface A of the mold 60, predetermined cooling is performed on the outer surface B on the back side of the mold 60.

(2) Formwork Further, when reversing the mold 60 including the frame member 61 in the powder slush portion (B part), the sheet-like material 94 is formed only on the desired inner surface (A) of the mold 60. Preferably, molds 84 a and 84 b having a predetermined thickness (height) are provided between the mold 60 and the reservoir tank 88 so as to be able to.
Here, the lower portion of the mold 84 b is made of, for example, aluminum, and the upper portion of one of the molds 84 a is made of a combination of a silicone rubber / fluorinated resin film. It can also serve to fill in the gaps between them.

(3) Molding resin The molding resin used in the powder slush portion (part B) is not particularly limited, but, for example, epoxy resin, urethane resin (including thermoplastic urethane resin), polyester resin (A thermoplastic polyester resin is also included.) An acrylic resin, a vinyl chloride resin, an olefin resin (also including a thermoplastic olefin resin), a silicone resin etc. 1 type individual or 2 or more types of combinations are mentioned.
In particular, in the case of a vinyl chloride resin or a thermoplastic urethane resin, the affinity with the second resin forming the undercoat layer is good, strong adhesion is obtained, and further, the low temperature brittleness is excellent. Therefore, it is a suitable resin.

(4) Powdering time Also, in the powder slush portion (part B), as described above, the powdering time is set to a value within the range of 18 to 60 seconds in order to form the sheet-like material 94 having a uniform thickness. It is preferable to do.
The reason is that when the powdering time is less than 18 seconds, the molding resin may be easily melted by heat, making it difficult to stably form the sheet-like material 94 having a predetermined thickness. It is for.
On the other hand, if the powdering time exceeds 60 seconds, the production efficiency of the sheet-like material 94 is significantly reduced, and the time for heating the mold to a predetermined temperature, and hence the tact time, become excessively long. In some cases.
Therefore, the powdering time is more preferably in the range of 20 to 40 seconds, and still more preferably in the range of 25 to 38 seconds.

6. Mold Cooling Unit (1) Configuration 1
As shown in FIG. 7 (b), the mold cooling section (C section) cools the mold 60 including the frame member 61 by a cooling device 55 such as water cooling or air cooling so that the sheet-like material 94 has a predetermined degree. The cooling device 55 is a component comprising a cooling device 55 for solidification.
More specifically, the cooling device 55 sprays a shower or a cooling mist onto the outer surface (surface B) of the mold 60 on which the sheet-like material 94 is formed, and cools it to a predetermined temperature. .

(2) Configuration 2
Moreover, it is preferable to set it as the metal mold | die cooling structure by at least three-step step by the combination of a 1st air blow, mist / shower, and a 2nd air blow regarding this mold cooling part.
That is, first, air is blown as the first air to the inside and outside of the mold 60 of about 150 ° C. in which the sheet-like material 94 is formed, and the mold temperature is lowered to about 100 ° C. Is preferred.

Then, it is preferable to lower the temperature of the mold to about 50 ° C. by spraying a water mist and a water shower from the outside of the mold from a mist nozzle and a shower nozzle, or either one of the nozzles 98.
Finally, a sheet-like material 94 is formed, and air is blown as the second air to the outer surface and the inner surface of the mold 60 cooled to about 50 ° C., and heat storage of the mold temperature is further taken. It is preferable to blow off water droplets and the like remaining on the mold surface to effectively prevent the occurrence of rust in the mold.

Therefore, it is preferable to use a nozzle 98 such as a shower nozzle / mist nozzle and an air nozzle (not shown) as the cooling device 55 in combination in the mold cooling portion (C portion).
The shower device / mist device is preferably connected to one water supply tank, and the spray amount and the shower amount are preferably determined by a switching device such as a control valve provided at the outlet.

(3) Temperature / Time In addition, with regard to the mold cooling portion (C part), the mold 60 forming the sheet-like material 94 is cooled by at least three steps, and the mold temperature is a value of 60 ° C. or less It is preferable to
The reason for this is that if the mold temperature exceeds 60 ° C., it may be difficult to remove the mold in the next step or to apply the second resin in the next cycle.

However, if the mold temperature is excessively lowered, the cooling time may become excessively long. Therefore, it is preferable to set the mold temperature after cooling to a value of 30 ° C. or more.
Therefore, in the mold cooling unit, the mold temperature including the sheet-like material 94 is more preferably set to a value within the range of 30 to 50 ° C, and further preferably set to a value within the range of 40 to 45 ° C.

And, in the mold cooling section (C section), it is preferable to set the cooling time to a value within the range of 25 to 50 seconds.
The reason is that when the cooling time is less than 25 seconds, it may be difficult to set the temperature of the mold 60 forming the sheet-like material 94 to a predetermined value or less.
On the other hand, when the cooling time reaches a value exceeding 50 seconds, the time for cooling the mold 60 to a predetermined temperature, and hence the tact time, may become excessively long, which may be economically disadvantageous.
Therefore, in the mold cooling unit, the cooling time is more preferably set to a value within the range of 30 to 45 seconds, and further preferably set to a value within the range of 35 to 40 seconds.

(4) Cooling rate (temperature gradient)
Further, in the mold cooling unit (C part), it is preferable to set the cooling rate of the mold, that is, the temperature gradient at the time of cooling to a value within the range of 100 to 220 ° C./minute.
The reason for this is that when the cooling rate of the mold reaches a value of less than 100 ° C./min, the time for cooling the mold to a predetermined temperature, and hence the takt time for obtaining one sheet-like product 94, is excessive. It is because it may become economically disadvantageous for a long time.
On the other hand, when the cooling rate of the mold reaches a value exceeding 220 ° C./min, the mold is rapidly cooled, the thermal fatigue may become extremely large, and a crack may easily occur.
Therefore, in the mold cooling unit (C part), it is more preferable to set the cooling rate of the mold to a value within the range of 120 to 210 ° C./min, and to set a value within the range of 140 to 200 ° C./min. Is more preferred.

(5) Others Others, although not shown, in the mold cooling section (C part), when cooling the mold forming the sheet-like material, it is inverted and the outer surface of the mold to be cooled, and from this It is preferable to virtually contact the inner surface of another mold waiting to be heated.
The reason for this is that, before carrying out the above-described cooling step, as a preliminary step, the sheet-like material is formed by merely bringing the inner surface of another mold into contact in a short time in this manner. This is because the heat of the mold is directly transferred and effectively cooled.
On the other hand, since the heat of the mold forming the sheet is directly transferred to the inner surface of another mold and the heat is conversely heated, the heat treatment in the mold heating part is further shortened Can be done with

7. Mold Exchange Unit Further, it is preferable that the powder slush molding machine 10 of the present embodiment further includes a mold exchange unit (D part).
The reason for this is that the mold replacement part (D part) is used to change to a mold for molding different types of two-color-formed sheet materials during powder slush molding, or powder slush molding. This is to cope with the case where mold damage occurs during molding.
That is, even in such a case, the mold can be replaced while the powder slush molding machine 10 is operated.

On the other hand, the die replacing portion (D portion) also serves as a place (temporary table) on which the cooling device 55 is temporarily placed when powder slush molding is performed.
Therefore, as shown in FIG. 1 and FIG. 2, the die replacement part (D part) is provided with a support base 66 for mounting the die 60, and the position of the support base 66 is controlled by external control. , Preferably movable.
For example, in the example of the mold replacement portion (D part) shown in FIG. 2, a replacement mold 60 ′ and a frame member 61 a ′ of the replacement mold 60 ′ stand by on the support base 66. Furthermore, another replacement mold 60 ′ ′ and a frame member 61a ′ ′ are waiting on the support base 66 extending upward.

8. Other (1) Sheet-like Material Regarding the form of the powder slush-formed sheet-like material 94 shown in FIG. 6 etc., the thickness is usually a value within the range of 1.1 to 1.6 mm, more preferably It is preferable to set it as the value within the range of 1.2-1.4 mm.
The sheet-like material 94 is, for example, an epoxy resin, a vinyl chloride resin, an acrylic resin, an olefin resin (including a thermoplastic olefin resin), a urethane resin (including a thermoplastic urethane resin), a polycarbonate resin, or a polyester. It is preferable to be composed of at least one resin of resin (including thermoplastic polyester resin).
The reason for this is that this configuration can provide a sheet-like material 94 that is highly versatile, inexpensive, and excellent in decorativeness.

(2) Modifications Although the description of the first embodiment has been completed, the aspect of the powder slush molding machine is not limited to this embodiment.
For example, in the embodiment described above, the mold heating unit (A portion) includes the hot air generator 40 disposed on the lower side and the electric heating furnace 50 disposed on the upper side. Alternatively, the lower side may also be an electric furnace.
As described above, by arranging the electric heating furnace on both surfaces of the mold heating unit (A part) and heating them respectively, the mold can be effectively heated without using a hydrocarbon gas, Environmental load can be reduced more.

Second Embodiment
In the second embodiment of the present invention, a mold heating portion (part A) for heating a mold 60 shown in FIG. 8 and a molding resin are blown while being powdered, and the inner surface of the heated mold 60 is heated. A powder slush portion (B portion) for forming a sheet-like material 94 having a predetermined thickness, and a mold cooling portion (C portion) for cooling the mold 60 so that the temperature of the mold 60 becomes a predetermined temperature or less. , And a processing unit (demolding unit) (demolding unit) (departing unit) for demolding the cooled sheet-like material 94 from the mold 60; (Crane robot) 62, and is a powder slush molding machine 10 '.
And, at least a mold heating portion (A portion) for heating the mold 60 and a mold cooling portion (C portion) radially (perpendicularly, etc. are included) around the transfer device 62 for transferring the mold 60. Is a powder slush molding machine 10 characterized in that

1. Basic Configuration As shown in FIG. 8, as a basic configuration, a mold heating portion (A portion) provided with an electric heating element for heating the mold 60 and a molding resin are sprayed while being heated, and heating is performed. A powder slush portion (part B) for forming a sheet-like material 94 having a predetermined thickness on the inner surface of the mold 60, and a metal for cooling the mold 60 so that the temperature of the mold 60 becomes a predetermined temperature or less. A mold cooling unit (C section) and a mold processing section (demolding section) (E section) for demolding the cooled sheet-like material 94 from the mold 60; It is a powder slush molding machine 10 provided with a crane robot or the like as a transfer device 62 for moving between the respective parts.

Then, after separately preheating the mold 60 before heating or without preheating, the mold 60 is placed at a predetermined place below the mold heating portion (A portion) for heating the mold 60, and then It is a powder slush molding machine 10 for forming a predetermined sheet-like material 94 by performing a heating process, a powder slush process, a cooling process, and a demolding process.
The electric heating element used in the mold heating section (A section) for heating the mold 60, the powder slush section (B section), the mold cooling section (C section), and the cooled sheet-like material 94 The configuration and the like of the die processing unit (removal unit) (E part) to be demolded from the die 60 can be the same as the contents described in the first embodiment.

However, the mold heating unit (part A) for heating the mold 60 causes the mold 60 to move in and out easily and in a short time by using a crane robot that can rotate and move radially as the transfer device 62. Therefore, it is preferable that the heating unit and the mounting unit be divided into two in the vertical direction and separated and opened, for example, the mold can be taken in and out from the lateral direction or an oblique side.
Therefore, when the mold 60 is carried in, it is preferable that the mold heating part (A part) is divided into two parts and separated and opened into the upper heating part and the lower mounting part.

  Then, when a part of the mold heating portion (A part) for heating the mold 60 is separated and opened in the vertical direction, the heated air is not illustrated so as not to scatter excessively to the outside, although not shown, gold It is preferable to provide a heat insulating part for surrounding the mold heating part (A part) by heat insulation.

2. Basic Arrangement As a basic arrangement, as shown in FIG. 8, a mold heating unit (part A) provided with an electric heating element for heating at least the mold 60, and a mold cooling unit (part C) It is preferable to arrange radially (including at right angles) around the transfer device 62 for transferring the mold 60.
The reason for this is that the crane robot as the transfer device 62 holds the mold with an extremely short distance, and between the mold heating part (part A) and the mold cooling part (part C) In addition, even if a plurality of molds are used, complicated movements between them can be implemented extremely easily.

Therefore, one or more molds are provided between the mold heating unit (part A) for heating the mold 60, the powder slush part (part B), and the mold cooling unit (part C). It becomes possible to move in a short time while holding it.
In addition, as shown in FIG. 8, a mold heating portion (A portion) provided with an electric heating element for heating at least the mold 60, a mold cooling portion (C portion), and further, a powder slush portion (B It is more preferable to arrange radially (including right-angled) around the transfer device 62 for transferring the mold 60, including the parts).

3. Transport device (crane robot)
Although the aspect of the crane robot as the transfer device 62 is not particularly limited, as shown in FIG. 8, at least a gripping portion 100 c gripping a mold, and an arm portion 100 b expandable and contractable while gripping the mold It is preferable that it is a robot type conveyance apparatus (a chain block etc. is included) provided with the rotational operation part 100a which rotationally drives radially, respectively.
That is, in the case of such a crane robot, a mold heating portion (A portion) which rotationally drives at least the mold 60 with an electric heating element, a powder slush portion (B portion), and a mold cooling portion As shown by dotted lines H and I, the mold 60 (60A, 60B, 60C) is moved while being gripped with (part C), and the arm 100b is expanded and contracted while holding the mold 60. Then, the mold 60 can be placed at a predetermined place.

4. Process operation (1) Mold processing process (E part)
As shown in FIG. 8, in the processing step of the mold 60, the mold 60 for forming the sheet-like material 64 on the inner surface is transferred to a mold processing portion (part E) which is a part of the powder slush molding machine 10. It is a process to carry in.
Then, the mold processing portion (part E) is also a step in which the sheet-like material 64 is released from the inner surface of the mold 60 after being cooled to a predetermined temperature through the forming step.
That is, the mold processing unit (E section) is a process for carrying in the steps of carrying in the mold 60 before molding and removing the sheet-like material 64 after molding.

(2) Mold heating process (part A)
Next, the mold heating step is a step of heating the mold 60 to a predetermined temperature using the electric heating element 52 in the heating unit (part A).
That is, the mold 60 is moved from the mold processing unit (E) to the mold heating unit (B) by the transfer device (crane robot) 62 shown in FIG. 8 and carried into the electric furnace 56, Therefore, this is a step of heating the mold 60 to a predetermined temperature using the electric heating element 52.
In addition, in the powder slush process which is the next process, the electric heating element is usually set so that the inner surface temperature of the mold (including the coated layer surface) becomes 230 to 400 ° C. so that a uniform sheet 64 can be formed. It is preferable to perform heat treatment using 52.

(3) Powder slush process (part B)
The powder slush process is a process of forming a predetermined sheet on the inner surface of the mold 60 heated to a predetermined temperature (hereinafter, may be referred to as a slush process).
That is, the heated mold 60 is moved from the mold heating section (A section) to the powder slush section (B section) by the transfer device (crane robot) 62 shown in FIG. This is a step of forming a sheet-like material 94 from powder 92 such as certain vinyl chloride resin particles and thermoplastic plastic particles.

Here, when the slush process is performed, it is preferable to form the sheet-like material 94 as in the first embodiment.
That is, as shown in FIGS. 6A to 7A, the mold 60 including the frame member 60a and the reservoir tank 88 are rotated in a connected state, and the molding surface 85 of the mold 60 In general, it is preferable to form a sheet 94 having a thickness of 0.8 to 2 mm.
That is, the powder 92 in the reservoir tank 88 falls on the molding surface 85 of the mold 60 by its own weight by reversing the mold 60 including the frame member 60 a and the reservoir tank 88 in the vertical direction. .
Then, only the powder 92 in contact with the molding surface 85 of the mold 60 and the powder 92 in the vicinity thereof are melted by heat of the mold 60 and adhere to the sheet 60 with respect to the molding surface 85 of the mold 60. The object 94 can be formed in an instant.

In addition, when inverting the mold 60 including the frame member 60a, the powder 92 is not scattered except at a predetermined location, and stirring is performed so that the sheet-like material 94 can be formed only on the desired molding surface 85 of the mold 60. It is preferable to reduce the pressure in the mold 60 by suction through the chamber 88a.
That is, during powder slush molding by rotating the mold 60, suction is performed to lower the internal pressure of the mold 60, and before powder slush molding, air is drawn into the powder 92 of the reservoir tank 88. Preferably, a pressure regulator (not shown) is provided for blowing.

(4) Mold cooling process (C part)
The mold cooling step is a step of cooling the mold 60 in which the sheet-like material 94 is formed in the mold cooling unit (C portion) to a predetermined temperature.
That is, the mold 60 in a state in which the sheet-like material 94 is formed is moved from the powder slush portion (B portion) to the mold cooling portion (C portion) by the transfer device (crane robot) 62 shown in FIG. As in the first embodiment, this is a step of cooling to a predetermined temperature, for example, 50 ° C. or less by the cooling device.

(5) Mold release process (E part)
The demolding step is a step of demolding the formed sheet-like material 94 in the mold processing section (E part).
That is, the mold 60 in a state in which the sheet-like material 94 is formed from the mold cooling unit (C) to the mold processing unit (E) (not shown) by the transfer device (crane robot) 62 shown in FIG. It is a process of moving and demolding the sheet-like material 94 from there.
In addition, such a demolding process can be automatically performed using a robot, or the sheet-like material can be demolded as a human operation.

According to the powder slush molding machine of the present invention, the heating electric heating furnace having a predetermined electric heating element is provided instead of or as a part of the hot air generator which is originally heated from the inner surface of the mold In the mold heating unit (part A), the mold can be rapidly and uniformly heated to a predetermined temperature while suppressing generation of exhaust gas and the like.
That is, even when the conventional hot air generator is partially or completely omitted, at least the outer surface or the whole of the mold can be heated to heat the mold quickly and uniformly. became.

In addition, the electric heating furnace that heats the mold enables partial heating and the like, and along with that, the heating time of the mold is further shortened, and the temperature distribution inside the mold at necessary places becomes smaller, In particular, as shown in FIG. 6A, even at the inner surface position 60c of the most recessed mold 60, uniform partial heating becomes possible, and metal fatigue (crack generation) of the mold 60 is generated. It came to be able to prevent effectively.
Therefore, according to the powder slush molding machine of the present invention, a sheet-like material 94 having a more uniform thickness and quality can be obtained quickly, so that the manufacturing cost is reduced, and high-quality automobile interior materials and It is expected to be suitably used as a bumper or the like.

Furthermore, according to another powder slush molding machine of the present invention, while providing a heating electric heating furnace having a predetermined electric heating element, at least a mold heating unit and a mold cooling unit are molds serving as a transfer device. Are arranged radially around the crane robot provided with a gripping part that holds the arm, an arm that extends and contracts while holding the mold, and a rotary operation part that rotates and rotates radially, etc. The movement time of etc. was shortened, and it became possible to effectively prevent the temperature drop of the mold during transportation.
And, even if the mold is enlarged or deformed, miniaturization of the powder slush molding machine and processing of the mold for a short time become possible, and consequently, simultaneous processing of a plurality of molds (heat treatment, It became possible to easily carry out cooling processing etc.).

  10: Powder slush molding machine, 40: Hot air generator, 50: Electric heating furnace, 51: Electric heating furnace main body, 52: Electric heating element, 52b: Heat resistant member, 52c: Hole, 53: Lifting device, 54: Heat resistant blanket material , 55: cooling device, 60, 60A, 60B, 60C, 60D: mold, 60 ', 60' ': mold for replacement, 61: frame member for mold, 61a', 61a ": for replacement Mold frame member 62: transfer device (crane or crane robot) 63: preheating device 88: reservoir tank 92: molded resin 94: sheet-like material 98: shower nozzle / mist nozzle 100a: rotation Operating unit, 100b: arm unit, 100c: gripping unit

Claims (8)

A mold heating unit for heating the mold;
A powder slush portion for forming a sheet by powdering molding resin on the inner surface of the mold heated by the mold heating portion;
A mold cooling section for cooling the mold after powdering at the powder slush section;
A demolding section for demolding a sheet from the mold cooled by the mold cooling section;
As well as
A powder slush molding machine comprising an electric heating element having a heat resistant member at least on the back side on an inner surface of an electric heating furnace main body provided in the mold heating portion.   The powder slush molding machine according to claim 1, wherein a plurality of the electric heating elements are arranged in a pattern.   The powder slush molding machine according to claim 1 or 2, wherein the heat-resistant member of the electric heating element is made of stainless steel or aluminum alloy.   The powder slush molding machine according to any one of claims 1 to 3, wherein the electric heating furnace main body provided in the mold heating portion has a semi-cylindrical shape whose both end surfaces are closed.   Under the electric heating furnace main body provided in the mold heating unit, a mount for mounting the mold is provided, and an electric heating element provided in the electric heating furnace main body is also provided around the mount. The powder slush molding machine according to any one of claims 1 to 4, wherein another electric heating element is provided.   The powder slush molding machine according to any one of claims 1 to 5, wherein the periphery of the mold heating portion is coated with a heat insulating material. A mold heating unit that heats the mold with at least an electric heating element; and a powder slush portion that forms a sheet-like material of a predetermined thickness on the inner surface of the heated mold by blowing molding resin while powdering. A mold cooling unit for cooling the mold so that the temperature of the mold is equal to or lower than a predetermined temperature; and a mold processing unit for removing the cooled sheet-like material from the mold; What is claimed is: 1. A powder slush molding machine comprising a transfer device for moving a mold between respective parts, comprising:
The inner surface of the electric heating furnace main body provided in the mold heating portion is provided with an electric heating element having a heat resistant member at least on the back side,
A powder slush molding machine, wherein at least a mold heating unit and a mold cooling unit are radially disposed around the transfer device.   8. The crane robot according to claim 7, wherein the transfer device is a crane robot including at least a holding unit for holding a mold, an arm unit for expanding and contracting while holding the mold, and a rotational operation unit for rotating and driving radially. Powder slush molding machine described.

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