JPH0545465Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an apparatus for producing molded ceilings for automobiles.

[Prior Art] Molded ceilings are used in today's automobile ceilings.

Generally, this molded ceiling is made by press-molding a thermoplastic base material such as resin felt made by mixing a certain amount of finely chopped fibers with a thermoplastic resin material, or a base material such as cardboard. A skin material is attached to the surface of the wood. Then, the molded ceiling is attached to the ceiling of the automobile interior with screws or the like, and its edges are terminated with trim pieces or weather strips.

In addition, the molding method when using a thermoplastic base material is to first place the base material between a pair of molds heated to about 230° C. and pressurize it to thermoform it. Next, an adhesive such as hot melt is applied to the surface of the base material corresponding to the interior side of the vehicle, and it is placed in a press molding machine.
It is press-bonded to the skin material while heated to ℃ and is integrally molded. If the same molded ceiling is produced in small quantities, preparing a mold for base material molding and a mold for press adhesion separately will increase the cost of molds, so the same mold can be used. It is also used in

Therefore, for example, a method is adopted in which the work is performed alternately, such as molding the base material in the morning work and press bonding work in the afternoon work. but,
When molding the base material, it is necessary to heat the mold to about 230℃, and when press bonding, it is necessary to use a mold heated to about 140℃. The mold must be cooled to a temperature suitable for press bonding.

Conventionally, as a means for cooling this mold, for example, as shown in FIG. 7, an upper mold 51 and a lower mold 52 are used.
A blower 53 that can move forward and backward is provided between the two.
This blower 53 is an air compressor (not shown).
A plurality of small holes 54 are provided above and below the pipe material connected to the mold 5 through these small holes 54.
1 and 52 are blown with air to cool them.

[Problems to be solved by the invention] However, with this cooling means, surrounding dust is blown away by the blown air, polluting the inside of the factory, and heat is radiated into the inside of the factory. For this reason, there is a problem that the working environment is worsened.

Furthermore, since cooling may require about two hours, there are also problems in that it is time consuming and has poor workability.

The present invention was developed in view of the above problems, and its purpose is to rapidly cool the mold without deteriorating the working environment in the factory, shorten the time until the next process, and improve work efficiency. An object of the present invention is to provide a molded ceiling manufacturing apparatus for automobiles that can improve the performance.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a molded ceiling manufacturing apparatus for automobiles that pressurizes and thermoforms a thermoplastic base material between a pair of molds, at least one of which is heated. The present invention is characterized in that a cooling body, which is formed into a bag shape made of an elastic material and has a cooling medium placed inside to cool the outer surface, is removably provided between the pair of molds.

[Function] According to this configuration, the heat inside the mold is not released to the outside, but can be sequentially absorbed by the cooling medium stored in the cooling body. Furthermore, by connecting the cooling body to an external device, the temperature of the cooling medium introduced into the mold can be controlled relatively easily, and the temperature can be quickly lowered to a predetermined temperature without putting a burden on the mold.

[Example] Hereinafter, an example of the present invention will be described in detail using the drawings.

FIG. 1 is a schematic perspective view of a molded ceiling manufacturing apparatus for automobiles according to an embodiment of the present invention, and FIG.
FIG. 2 is a vertical cross-sectional side view taken along line A-A in the figure.

In the figure, this device consists of a pair of upper and lower molds 1,
2, and a cooling body 3 interposed between the molds 1 and 2.
It consists of etc.

To explain further, mold 1 and mold 2 are arranged one above the other, and the upper mold 1 is controlled by a hydraulic system (not shown).
is movable up and down with respect to the lower mold 2. Further, a heater 4 is arranged inside each of the two molds 1 and 2, and the heater 4 can heat the molding surfaces 1a and 2a to a temperature of about 230°C. In some cases, this heater 4 may be provided only on the upper or lower mold. Then, a thermoplastic base material 5 formed in a plate shape is set between the heated molds 1 and 2, and when it is further sandwiched between the molds 1 and 2 and pressurized, it is thermally deformed. A base material 5 having the shape of a predetermined molded ceiling as shown in FIG. 4 is molded. The thermoplastic base material 5 is made of, for example, a resin felt made by mixing a certain amount of finely chopped fibers with a thermoplastic resin, which deforms when heated to about 200°C.

On the other hand, the outer periphery of the cooling body 3 is bordered in a rectangular shape by a frame member 6 made of relatively hard rubber, etc., and expands and contracts on the upper and lower surfaces of the portion surrounded by the frame member 6. It is formed into a bag shape by stretching a flexible sheet material 7. In addition, the frame member 6
Through-holes 6a are provided on opposing sides thereof, penetrating inwardly and outwardly, and pipes 8 are connected to the through-holes 6a, respectively. Note that one end of this pipe 8 is connected to a cooler (not shown). Then, a cooling medium such as a gas or liquid with good heat absorption is injected from one pipe 8, and is extracted from the other pipe 8, so that the temperature of the molds 1 and 2 can be absorbed while being circulated. That's what I do. Note that the temperature of this cooling medium is controlled by a cooler (not shown).

When manufacturing a molded ceiling for an automobile using a manufacturing apparatus configured as described above, first, the molds 1 and 2 are heated to a temperature of about 230° C., suitable for molding the base material 5, using the heater 4. put. In this state, when the base material 5 is set between the molds 1 and 2 and pressurized, the base material 5 is molded as shown in FIG. 4 with thermal deformation. In this way, this base material 5
First, mold the required number. In addition, when molding the base material 5, a die-lark molding method may be used in which the base material 5 is heated in advance before being set in the molds 1 and 2.

Further, once the required number of base materials 5 have been molded, the next step is to press-bond the skin material 9 to the base material 5 using the same molds 1 and 2. The surface temperature of the molds 1 and 2 suitable for this press bonding is about 140°C. Therefore, prior to this press bonding work, the molds 1 and 2 were
Work will be carried out to lower the temperature from 230℃ to approximately 140℃.

In this operation, first, the molds 1 and 2 are butted against each other with the cooling body 3 interposed between them. Then, in this state, a cooling medium is injected into the interior from one pipe 8 and extracted from the other pipe to be circulated, and the mold 1,
The internal temperature of 2 is successively absorbed and lowered by the cooling body 3.
In this way, the molds 1 and 2 are approximately
When the temperature has dropped to about 140°C, an adhesive such as hot melt is applied to the surface of the base material 5 corresponding to the interior side of the vehicle, and the material is again set on the lower mold 2. Next, the skin material 9 is placed on top of this adhesive, and then the upper mold 1 is pressed onto the lower mold 2, so that the base material 5 and the skin material 9 are press-bonded to each other via the adhesive. Ru. Furthermore, by folding back the terminal portion 9a and pasting it, a molded ceiling 10 with the skin material 9 pasted as shown in FIGS. 5 and 6 is completed.

Therefore, in the molded ceiling manufacturing equipment configured in this way, when lowering the temperature of the molds 1 and 2, a cooling body 3 is interposed between the molds 1 and 2, and the temperature can be absorbed and lowered by the cooling medium in this cooling body 3. In other words, since air is not blown and released to the outside as in the conventional equipment, the working environment is not deteriorated. In addition, since the temperature of the cooling medium can be relatively easily controlled, the temperature can be quickly lowered to the specified temperature without putting a strain on the molds 1 and 2. This allows a smooth transition to the next process.

[Effects of the Invention] As explained above, according to the automobile molded ceiling manufacturing apparatus according to the present invention, the heat in the mold is sequentially absorbed by the cooling medium stored in the cooling body. Therefore, since it is not released to the outside unlike in the past, it does not make the working environment worse. Also,
By connecting the cooling body to an external device, the temperature of the cooling medium placed inside can be controlled relatively easily, and the temperature can be quickly lowered to a predetermined temperature without putting a burden on the mold. This allows the next step to be carried out quickly and improves work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of a molded ceiling manufacturing apparatus for automobiles according to an embodiment of the present invention, Fig. 2 is a vertical cross-sectional side view taken along line A-A in Fig. 1, and Fig. 3 is the same manufacturing apparatus. Fig. 4 is an external perspective view showing the base material after molding, and Fig. 5 is a schematic external perspective view of a molded ceiling completed by pasting a skin material on the molded base material. , FIG. 6 is a vertical cross-sectional side view taken along line BB in FIG. 5, and FIG. 7 is a perspective view of a schematic configuration of the conventional device. 1, 2... Mold, 3... Cooling body, 5... Thermoplastic base material, 10... Molded ceiling.

Claims (1)

[Scope of utility model registration request] This is an automotive molded ceiling manufacturing device that pressurizes and thermoforms a thermoplastic base material between a pair of molds, at least one of which is heated, and is formed into a bag shape made of elastic material and has a cooling medium inside. A molded ceiling manufacturing apparatus for an automobile, characterized in that a cooling body is removably provided between the pair of molds, and the outer surface of the mold is cooled.