JPS62253417A - Method of slush molding skin material and its molding equipment - Google Patents

Abstract

PURPOSE:To apply slush molding easily to the titled skin material irrespective of the size of a molded product, by a method wherein after discharge of an excess resin material except for the material stuck to a cavity surface of post-loading mold, a heating medium is jetted even to the inside of the skin material in addition to conduction heating from the backside of the mold. CONSTITUTION:A slush mold 4 provided with a temperature adjusting mechanism is preheated at need, a resin material is loaded within a molding cavity of the mold and the material is stuck to a cavity surface in a semimolten state through heating of the mold. Then with the heating of the mold itself an excess material is jetted even to the surface of the resin material stuck to the cavity surface of a heating medium by discharging the excess material through the mold and the mold is cooled after cure of the stuck resin material. The heating medium pressurized within a heat accumulation tank 48 is jetted through a jet 52 group and the resin material which i stuck to the molding cavity surface of the mold 4 beforehand and in the semimolten state is heated from the molding cavity surface at the same time with the heating from the backside of the mold. The heating medium used for the heating of a skin material arrives at a discharge pipe 45 by flowing through a spatial part 50.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a slush molding method for a skin material and a molding apparatus thereof, and in particular, the present invention is directed to slush molding of a thick skin material. Examples of skin materials include skins that are part of automobile interior parts such as console boxes, instrument panel pads, and glove boxes.As a final product, this skin material can be used as a foam layer or as a shape-retaining material. This is a member for covering the outside of the core material.

(Prior art) Molding of skin materials by slush molding is a relatively simple method and can produce accurate skin materials with precise surface patterns. It is widely used in various industrial fields.

Conventional slush molding, as seen in Japanese Patent Publication No. 54-10581, includes a method in which a heating oil supply pipe is installed on the back of the mold, a method in which heating wires are buried in the mold, and a method in which a heating wire is buried in the mold. Chloride is added to the heated mold from the back side by bringing the back side of the mold directly close to the flame, or by immersing the back side of the mold in heat transfer oil or heated metal powder. Vinyl resin plastizo or powder is put into a mold, and after partially gelling or semi-melting the material on the molding cavity surface of the mold, the excess material is discharged.

Furthermore, after the mold is heated to solidify the molten adhesive resin, the mold is cooled to complete the skin material.

(Problem to be solved by the invention) In recent years, as the tastes of consumers have become more sophisticated and diversified, these skin materials are required to have higher quality and thickness, and the skin materials themselves are also thicker. There is an increasing demand for composite skin materials such as , or dissimilar materials, solid layers and foam layers. When manufacturing thick skin materials using slush molding, heating only from the back side of the mold makes it difficult to heat uniformly over the entire area of the skin material, resulting in a uniform skin. We have seen the emergence of problems that need to be resolved when obtaining timber.

In particular, when molding a skin material with a foam layer on the inside, the foam layer part that is away from the molding cavity surface of the mold,
Insufficient heating resulted in uneven foaming, making it difficult to obtain a homogeneous product. In addition, in the manufacturing process of composite skin materials, after one surface layer is temporarily formed, a different material is layered on the inside and heat treatment is performed again. Thermal conductivity is 0.031 kcal/
m-Hr'C, the inner layer is not sufficiently gelled or melted and foamed, making it difficult to obtain a high-quality product. Forcibly raising the temperature of the mold will cause local overheating of the surface layer that comes into contact with the mold cavity surface.

This also resulted in a change in the quality of the shield.

One way to solve these problems is to place the mold itself, which has the raw material fused onto the molding cavity surface in advance, into an open chamber set at a high temperature.

A method of heating and forming from both the inside and outside of a mold has been proposed. However, in this case, if the molded product is small,
Although it is certainly an effective method, in the case of large molded products such as automobile console boxes, crash pads, and door trims, it naturally requires a large opening.
It is also inconvenient to handle, and there are still some problems that remain as a practical solution.

An object of the present invention is to solve these problems inherent in conventional slush molding means and to provide a simple slush molding method and apparatus for the same, regardless of the size of the molded product.

(Means for Solving the Problems) In order to achieve this object, the present invention has the following configuration. That is, the first invention according to the present invention is to preheat a slush molding mold equipped with a temperature control mechanism as necessary, to put a resin material into the molding cavity of the mold, and to heat the mold. After the material is adhered to the cavity surface in a semi-molten state, the excess material is discharged from the mold, and at the same time as the mold itself is heated, the heating medium is also ejected onto the surface of the adhered resin material on the cavity surface. , after curing of the adhesive material.

The second invention resides in a slush molding method consisting of a step of cooling a mold, and the molding section includes a slush mold and a heating and cooling medium generating device ejected toward the back side of the mold. 1, which covers the entire surface of the molding cavity surface of the mold of the molding part, and which is joined to the molding part 1.
The separable box-shaped auxiliary heating section is installed in a slush molding device in which an introduction member for guiding and ejecting a part of the heating medium generated in the molding section to the cavity surface of the mold is installed inside the box. be.

(Function) The mold for slush molding is preheated by ejecting a heating medium onto the back side of the mold as necessary.

A thermoplastic resin powder material is put into the cavity of the mold, and the mold is heated. A part of the powder resin adheres to the molding cavity surface of the mold in a semi-gelled, semi-molten state.

Excess resin material is then discharged, leaving the molten resin on the cavity surface. Next, there is a box-shaped auxiliary heating section on the cavity side of the mold.

The periphery of the mold is kept airtight, and the inside is left with an appropriate space for the flow of the heat medium, and the curing process proceeds by spouting the finishing heating medium from the back side of the mold. At the same time, a part of this heating medium is branched and supplied to the box-shaped auxiliary heating section, guided to the introduction member installed in the auxiliary heating section, and directed to the cavity surface of the mold, more precisely for the purpose. The mold is heated directly onto the inner surface of the skin, and by heating the mold from both the front and back sides, even if the skin is somewhat thick, it is possible to mold a substantially homogeneous product in each area. After heating, on the back side of the mold, if necessary, add 1 piece of sheath ↓ -a
) −==, −′:glrJ 'j＾−y)Jl 1l
The molded skin body is removed from the mold.

(Example) Next, a concrete apparatus for carrying out the slush molding method for skin materials according to the present invention will be explained using one drawing.

In the figure, (1) is a forming section equipped with a main heating mechanism, which is made of steel.

A generally rectangular box (3) made of a metal such as aluminum or a part of it made of synthetic resin, and whose inner or outer surface is preferably coated with glass wool, asbestos, etc. and heat-insulated, is filled with nickel, aluminum, copper, A slush molding die (4), usually having a thickness of 2 to 5111 mm, formed by electroforming or the like using other metals or alloys thereof, is assembled by fitting over the back side (5) of the die.

Hollow rotating shafts (6) and (7) that communicate with the inside of the box (3) are fixed to the left and right sides of the box (3), and the main body is the box (3) and the mold (4). The molded part (1) has a pair of bearings (9) (9) installed on a pair of left and right columns (8) (8).
The gear supported by the hollow rotating shafts (6) and (7) and fixed to the right rotating shaft (7) is
) F'y /r,, k l'l'jl l-V'
01111 +m:Ta It meshes with the gear a0 on the rotating shaft a4 of the a-ter α-bar, giving the molded part (1) rotational and oscillating motion. Also, the end of the left hollow rotating shaft (6) is a box (
3) A large number of nozzles/L' (g) groups protrude from the manifold αη so as to communicate with the manifold αη installed in the mold (4) and cover substantially the entire rear surface of the mold (4).

A rotary pipe joint (1) is provided at each outer end of the left hollow rotating shaft (6), which serves exclusively as a heating or cooling medium supply port, and the right hollow rotating shaft (7), which also serves as a medium discharge port. ) through Qυ, heating using a gaseous (air) medium, as shown in detail in Figure 3, and an example thereof.
A cooling duct circuit is installed outside the molded part (1).

First, the heating duct circuit (to) includes a valve, a heating blower (2), a heating heat exchanger (1), and a valve in the duct extending from the exhaust rotary pipe joint Qp. (B)
A circulation circuit to the air supply rotary piping joint (1) is formed through the air supply rotary piping joint (1).

Next, in the cooling duct circuit, a duct extending from the exhaust rotary pipe joint QD branches at a position in front of the valve (c), and the duct part has a valve (1) and a cooling blower 0η. , through the cooling heat exchanger (a) and the valve (to),
The valve (A) and the valve (A) also join together at a duct portion that also serves as a heating duct circuit at a position close to the air supply rotary piping joint (1).

As for the above-mentioned heat exchanger (2), for example, the heating heat exchanger (A) is composed of a large number of finned electric heaters (26A) with multiple stacked tubes, and the cooling heat exchanger (2) is composed of multiple stacked tubes. The finned cooling water piping (12A) is made up of multiple stacked pipes.

(to) corresponds to the molding part (1), especially the mold (4)
This is a box-shaped auxiliary heating part that sprays a heating medium for curing onto the molding cavity surface of the molding cavity.This box-shaped auxiliary heating part is placed on a trolley running on a track. lifting device, e.g. a pair of pneumatic cylinders (rods)
/4]) A backing (b) is installed on the upper surface of the box (to) which is installed on θ9 and has been moved directly below the molding part (1).
The auxiliary heating section (3) to which the material is attached is heated by the molding section's box (3) as the rod O]) of the pneumatic cylinder (G) expands.
The portion and the peripheral portion thereof are hermetically joined via the backing material (b).

A heating medium introduction member is installed in this box-shaped auxiliary heating part (7), and the heating medium generated in the molding part (1) is directed toward the molding cavity surface of the mold by using the introduction member. , guide it and make it squirt without waste.

Next, a mechanism for supplying an auxiliary heating medium to which a portion of the heating medium generated in the molding section (1) and is ejected onto the back side of the mold is branched will be explained.

When the molding part (1) and the box-shaped auxiliary heating part (2) are joined, a heating source is supplied from the manifold αη installed in the box (3) constituting the molding part (1) to the auxiliary heating part. A supply pipe (b) for diverting the medium and a discharge pipe for supplying the used heating medium to the discharge hollow rotating shaft (7) are installed on the surface part (3) of the molded IIP (x). There is.

These supply pipes and discharge pipes are each equipped with valves θ operated by actuators. It is desirable that the actuator (G) be thermally insulated. If this is difficult, the actuator (G) alone may be thermally insulated. If this is also not possible, the case (3) constituting the molded part (1) ) You must also consider installing a supply pipe (■) and a discharge pipe (-) outside.

Next, to disclose a specific example of the heating medium introducing member (to) provided in the box-shaped auxiliary heating part (2), In this case, the entire box of the auxiliary heating section is converted into a heat storage tank (to), and the heat storage tank tJ
When joining the introduction row provided in K and the supply pipe of the forming section (1), leaving a sufficient space between the forming section (1) and the auxiliary heating section to serve as a flow path for the heat medium, The bulging portion 15η that is in communication with and is raised from a part of the heat storage tank (to) fits into the mold (4) of the molding portion (1) with a sufficient gap left therebetween, and the bulging portion ( A heating medium is injected into the mold (4) through the nozzle holes (to) set on the top surface of the mold (4).
The heating medium after being injected into the molding section (1) is sent to the discharge pipe of the molding section (1).
is collected and discharged through the

As another example centered on the heating medium introducing member (goods), in FIG. , by forming a concave deflection diaphragm on the surface facing the molded body (1) so as to enclose the supply pipe and cover substantially the entire area of the mold (4); Another embodiment is shown in FIG. 5, in which a small manifold is installed inside the box of the auxiliary heating section (2), and the molded body (1) and the auxiliary heating section are joined together. At this time, the inlet 6't) of this small manifold is
The nozzle/I/(4) group, which communicates with the supply pipe of the molded body (1) and protrudes from the manifold, is configured to cover almost the entire area of the molding cavity surface of the mold (4). .

Still another embodiment is shown in Fig. 6, which can be said to be a modification of the introduction member shown in Fig. 4 above, in which the box itself (in the auxiliary heating section) is large. The introduction pipe (end) installed in the box (end) of the auxiliary heating part (end), which is connected to the supply pipe (b) of the molding part (1), is equipped with a spring ring. It has a built-in ball valve 6η that can keep only the pipe opening closed using pressure, and also has a heat storage tank.
A small, closed-type heat storage chamber that can penetrate into the mold (4) and leave a sufficient gap between it and the mold (4) is installed protrudingly, and the top surface of the heat storage chamber is equipped with a heating chamber. A group of spout holes were opened to blow out the medium towards the cavity surface of the mold, and a small inlet pipe was installed to serve as a communication port between the small heat storage chamber and the heat storage tank with a box. Similarly, the valve has a built-in small ball valve ring that can keep only the pipe opening closed using the pressing force of the spring (■). Instead of the ball valve Iυ-mechanism exemplified above, a valve using a reed or an automatic valve may be adopted.

Next, operations in a general process of slush molding using the apparatus according to the present invention will be explained step by step.

First, in the state shown in Figs. 1 and 3, the valves in the supply pipe (goods) and discharge pipe (■) provided in the molding section (1)
Close the heating duct circuit (to) in the external duct circuit
Open the valves (c) and (b) built into the cooling duct circuit, and close the valve (1) (to) built into the cooling duct circuit. The heating heat exchanger (E) is activated, the blower (A) is driven, and the hot air is stored in the manifold αη via the valve (A), the rotary pipe joint (1), and the hollow rotating shaft (6).
The water is ejected from the nozzle to almost the entire back surface of the mold (4), thereby heating the mold (4). The heating medium after being ejected fills the box (3) constituting the molding part (1), and then the hollow rotating shaft (7), rotary pipe joint Qη, ACx
It is suctioned and collected by a blower (via a blower).

200" O ~ 300 constituting a part of the molding part (1)
The mold (4), which has been preheated to a temperature of Plastisol or powdered vinyl chloride resin, ABS resin, or other thermoplastic resin is put into the mold (4), and then the electric motor A3 is driven to give rocking and rotational motion to the mold. , the powder material is deposited in a semi-gelled or semi-molten state over the details of the molding cavity surface of the mold, and the excess material is discharged into a container located below by rotating the mold downward. be done.

In addition, in the work of charging materials into the mold (4), a zarper tank is placed directly below the mold (4) that is positioned facing downward, and the tank and mold are joined and assembled.
The box (3) constituting the molding part (1) and the reservoir tank 2 are held together in an infant center without using a clamp h or the like, and the box-forming mold part (1) is rotated 180' together with the reservoir tank, and is rotated, etc. After the material is adhered to the molding cavity surface of the mold (4) in a semi-gelled or semi-molten state by the means described above, the molding part (1) together with the reservoir tank is rotated back to its original position, and the reservoir tank is separated. Pressed mold (4
) waits for the next process with the molding cavity side facing down.

A box-shaped auxiliary heating section (1) placed on a lifting device on a trolley (2) moving on a track (2)) is positioned directly below the forming section (1), and the lifting device, e.g. Along with the upward extension movement of the pneumatic cylinder -〇rod 0]), the auxiliary heating section (2
) is joined to the lower surface of the box (3) constituting the molding part (1) through a backing material (b) to maintain a sealed state, and at that time, the supply pipe of the molding part (1) is connected to the bottom surface of the box (3). is connected to the heating medium introduction member of the auxiliary heating section. Then, the closed valves θ in the supply pipe (1) and the discharge pipe (C) are opened like the valve @(C) in the heating duct circuit (2). The introduction member (goods) of this auxiliary heating section (2) is:
Several specific examples have been described in detail. The heating medium pressurized inside the mold (4
) The resin material, which is in a semi-molten state and has been previously attached to the surface of the molding cavity, is heated along with the back side of the mold.

The surface of the molding cavity, or more precisely, the inner surface of the skin material, is heated at the same time. The heat medium used to heat the skin material is
When joining the molded body (1) and the auxiliary heating part (to).

It flows through the space formed in between and reaches the discharge pipe (c), then returns to the heating blower (e) and the heating heat exchanger (c).
Cyclic reuse is carried out that eliminates the loss of thermal energy. After heating and solidifying the skin material.

Separate the auxiliary heating section (to) and the forming section (1), close the valve @ (c) in the heating duct circuit, then open the valve (to) (7) in the cooling duct circuit, - Manseikan (goods)
Close the valve θ't) (g) in the exhaust pipe and the cooling blower C1]).

The heat exchanger (a) is activated to cool the mold on the back side of the mold and, by extension, the skin. In addition, by opening the valves in the supply pipe and the discharge pipe that connect the auxiliary heating part (to) and the molding part (1), it is also possible to cool the mold from both the front and back sides. However, in the case of the heat medium introduction part of the auxiliary heating part (to), Figures 1 and 3, the heat storage tank (goods)
Depending on the capacity, the cooling capacity may actually decrease, so care must be taken in this regard.

Also, the cooling medium used for the cooling work was the cooling blower 01.
) may be adopted such that it is released into the atmosphere without being refluxed.

In addition, when the heating medium introducing member (goods) is configured with the concave deflection diaphragm (goods) shown in FIG. (goods), and then the said bulkhead (goods) as a guide.

The water is injected onto the entire surface of the molding cavity of the mold (4).

In addition, when the heating medium introducing member (goods) is configured with the manifold ring in FIG. 5, the table of the mold (4) is shown.

The heating medium is injected onto the back screen using a group of nozzles/V (to) that protrude from a pair of manifolds αη (to).

In addition, the heat storage chamber 6 is sufficiently pressurized by the ball valve part 1), which is divided into two large and small heat storage tanks in FIG. Ru.

The above embodiment is just one embodiment of the present invention, and in particular, the opening/closing mechanism of the forming part (1) and the auxiliary heating part (to), the motor of the forming part (1), the gear (c) Ql) Rotation and oscillation mechanism centered on the , heating and cooling medium generator, molding section
1) The means for supplying the heating medium and the means for heating and cooling the mold for slush are merely disclosed as one example.

For example, the opening/closing mechanism for the molding section (1) and the auxiliary heating section (to) is as follows:
It is also possible to use another actuator such as an electric motor instead of the lifting mechanism using the cylinder ■, or to open and close the parts (1) (to) by means of a circular movement fixed with a hinge. The rotation mechanism of the forming part (1) is changed to a transmission mechanism using a gear αυα field.

Chains, belts, etc. may also be used, or actuators for linear movement such as cylinders may be used.

Furthermore, for the heating source of the heating medium generator, oil, gas, etc. may be used instead of the electric heater (26A), and the atmosphere may be used as a cooling source.
- to 4A: tJl 凋L l い 0/1 - t4 - 壬+1
FRL MY J+e -y@There is. Alternatively, the heat medium may not be recovered and may be directly released into the atmosphere in the box of the molding section or the auxiliary heating section.

The heat medium to be used is not limited to air, but other gases such as nitrogen may be used for the purpose of preventing oxidation of each component, and liquid may be used as long as it does not adversely affect the skin material. do not have.

The heat medium is supplied to and discharged from the molding section using rotary piping joints (1) 61 and hollow rotating shafts (6) and (7).
It is also possible to use a hose or a tube, or a combination of both.

The heating means for the slush molding die shown in the embodiment is practical in terms of equipment cost and volume.

If multiple systems for heating and cooling are allowed, piping for passing a heat medium such as heat medium oil, steam, or cooling water hot gas may be installed in the slush mold (4), or heating wires may be buried. It is possible.

(Effects of the Invention) The slush molding method of the skin material according to the present invention applies conduction heating to the back side of the mold after discharging the excess resin material excluding the material that has adhered to the cavity surface of the mold after injection. In addition, the heating medium is also sprayed onto the inner surface of the skin material to heat both the front and back surfaces of the skin material, improving work efficiency and heating each part of the skin material approximately evenly. This makes it possible to avoid localized overheating even when using thick skin materials, foam layers on the inside, or laminated skin materials made of multiple types of resin materials. can. In addition, even when molding complex skin materials using highly uneven molds, melting and gelation of the skin material progresses evenly across each section due to heat treatment on both the front and back sides of the skin material, and especially when foaming agents The effect of promoting foaming is large, and the effect is remarkable for skin materials that have one foam layer inside.

Further, by controlling the amount of heating medium supplied from the inside of the skin material, its heating time, and heating temperature, it is possible to control the expansion ratio with relative ease.

It becomes possible to control the quality of fine-grained skin materials.

Further, the apparatus according to the present invention mainly includes a molding section that supplies a heating medium to the back side of the mold, and a box-shaped auxiliary heating section that can be joined and separated on the cavity surface side of the mold of the molding section. Become,
This auxiliary heating section is equipped with an introduction member for branching in a part of the heating medium generated in the molding section, and uses a single heating source to simultaneously heat both the front and back sides of the mold. Since heat treatment can be performed, the molding efficiency is improved and the mechanical simplification has a remarkable effect.

In addition, the heating medium that is concentratedly ejected onto the cavity surface of the mold and heats the inner surface of the skin body is returned to the molding part side and reused, resulting in a remarkable effect on the effective use of energy without waste. can be expected.

In addition, this device is much smaller in size than conventional means for simultaneously heating the entire surface of the mold by open use, and the heating medium can be ejected in a concentrated manner on both sides of the mold, resulting in good thermal efficiency. , the production space can be reduced, and productivity will definitely increase.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a partially cutaway front view of the slush forming apparatus according to the present invention, showing the forming part and the auxiliary heating part in a state immediately before joining, and Fig. 2 shows the forming part in the joined state and the auxiliary heating part. FIG. 3 is a front view centering on the heat medium duct circuit installed in this device, and FIGS. 4 to 6 are views corresponding to FIG. 1 showing other embodiments. FIG. In the figure, (1) is the molding part, (3) is the box, (4) is the slush mold, (5) is the back of the mold, (6) (7)
is a hollow rotating shaft. αη is the manifold, (to) is the nozzle, 0I Rikke rotary piping joint, (e) is the heating duct circuit, (c) (
wealth) is a valve. (To) is a heating blower, (E) is a heating heat exchanger, (Kan) is a cooling duct circuit, (To) (5) is a valve, Op is a cooling blower, (2) is a cooling heat exchanger, (to) is the auxiliary heating section,
(g) is the box, (b) is the backing, (goods) is the heating medium introduction member, (goods) is the supply pipe, (ni) is the discharge pipe, @η (goods) is the valve, and work (goods) is the storage. Thermal tank, (Foundation) is the inlet,
The ring is the space, the bulge is the bulge, and the end is the vent.
1 indicates a concave deflection diaphragm, 0 indicates a manifold, 0 indicates a nozzle, 6 indicates an inlet pipe, and Op ring indicates a ball valve. Figure 2 Figure 1 Figure 4 Figure 3rI! J Figure 6 Figure 5

Claims (10)

[Claims] (1) Preheat a slush molding mold equipped with a temperature control mechanism as necessary, put the resin material into the molding cavity of the mold, and heat the mold to place the material in a semi-molten state on the cavity surface. After adhering to the resin material, the excess material is discharged from the mold, the mold itself is heated, and the heating medium is also ejected onto the surface of the adhering resin material on the cavity surface, and after the adhering resin material is cured, the mold is removed. A slush molding method for skin materials that involves a cooling process. (2) The molding section consists of a slush molding die and a generating device for heating and cooling medium that is ejected toward the back side of the mold, while completely covering the molding cavity surface of the mold of the molding section. , and the box-shaped auxiliary heating part that can be joined to and separated from the molding part is an introduction member for guiding and ejecting a part of the heating medium generated in the molding part into the mold cavity surface into the box body. A slush molding device for skin materials is installed. (3) The back side of the slush molding die is fitted into the case, and the heating and cooling medium jetting part is connected to the skin material according to claim 2 housed in the case. Slush molding equipment. (4) When joining the mold cavity surface side of the molding part and the auxiliary heating part, the periphery of the joint part remains sealed, and an appropriate space is formed inside the joint part to serve as a flow path for the heat medium. A slush molding device for skin material according to claim 2 or 3. (5) The heating medium introduction member of the auxiliary heating section is such that the box itself constituting the auxiliary heating section is a heat storage tank, and a part of the tank is raised and has a bulge that fits into the cavity of the mold. The slush molding apparatus for skin material according to any one of claims 2 to 4, wherein a group of ejection holes opening toward the mold cavity surface are bored on the surface of the mold cavity. (6) Any one of claims 2 to 4, wherein the heating medium introducing member of the auxiliary heating section is constituted by a concave deflection diaphragm installed at the joint surface of the box-shaped auxiliary heating section. The slush molding device for skin material according to item 1. (7) The heating medium introducing member of the auxiliary heating section is constituted by a manifold provided with a group of nozzles facing the cavity surface of the mold. The slush molding device for skin material according to item 1. (8) The heating medium introduction member of the auxiliary heating section is such that the box itself that constitutes the auxiliary heating section is a heat storage tank, and a part of the tank fits into the cavity of the mold and is directed toward the cavity surface. Claim 2: A chamber is provided with a group of ejection holes, and a ball valve is provided in each of the heating medium introduction pipe to the heat storage tank and the heating medium introduction pipe to the chamber. A slush molding device for a skin material according to any one of items 1 to 4. (9) A discharge pipe for discharging a heating and cooling medium communicates between the molding section and the auxiliary heating section, and further communicates with a discharge mechanism provided in the molding section. The slush molding device for skin material according to any one of the above. (10) In any one of claims 2 to 9, the heating medium jetted to both the front and back surfaces of the mold forms a circulating flow in the molding section and the auxiliary heating section. A slush molding device for the skin material described above.