JPS6316500Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vacuum forming apparatus that can promote quick drying of an adhesive during vacuum forming.

[Conventional technology]

Conventionally, for example, in safety pads attached to instrument panels installed inside automobiles, the opening of the insert coated with adhesive was covered with thin plastic to prevent burrs from forming from the urethane foam during foam molding. It has been practiced to cover the insert with a skin made of film, and to attach the skin made of plastic film to the insert by vacuum forming. At that time, a vacuum forming apparatus as shown in FIGS. 4 and 5 is used.

In FIG. 4 and FIG. 5, 51 is a scissor lift which is an elevator, and this scissor lift 5
1 is provided with a mounting table 52 at the top and a support table 53 at the bottom. In addition, the mounting table 52
Support bodies 52a are provided at the four corners of the support base 53, and support bodies 53a are provided at the four corners of the support base 53 as well as the mounting base 52. Furthermore, each support 52a,
A leg body 54 is pivotally supported in an X-shape between the legs 53a, and is extendable and retractable. And the mounting table 5
2 is raised and lowered by a drive device (not shown).

Further, a vacuum forming mold 55 is fixed to the upper surface of the mounting table 52, and the upper part thereof serves as a molding part 56 on which the insert Wa is placed. Furthermore, the inside of the vacuum forming mold 55 is a space 57, and the forming part 56 has a large number of through holes 58 communicating with the space 57.
A vacuum hole 60 is formed at the bottom to which a vacuum pipe 59 leading to a vacuum device (not shown) is connected.

As a result, the vacuum forming mold 55 is moved to the scissor lift 5.
1 is activated, it is raised and lowered together with the mounting table 52, and a clamp 61 is disposed at the raised position, and the vacuum forming mold 55
The epidermis Wb is stretched.

When attaching the skin Wb to the insert Wa, the scissor lift 51 is operated to lower the vacuum mold 51 and place the insert Wa on the molding section 56. Next, an adhesive Wc is applied to the surface of the insert Wa and allowed to dry to some extent.
Subsequently, the skin Wb cut to a size larger than that to be vacuum formed is held by a clamp 61 and uniformly heated by a heater (not shown) or the like.

After that, the scissor lift 51 is operated in reverse to raise the vacuum forming mold 55 and cover it with the epidermis Wb.
Wb is the outer peripheral surface of insert Wa and vacuum forming mold 55
After it is stretched uniformly between the contact area on the outer circumferential surface of the mold 55, vacuum is drawn from the vacuum hole 60 of the vacuum mold 55. Then, the heated skin Wb in the vacuuming process comes into contact with the vacuum forming mold 55 and the insert Wa, and is cooled while the skin Wb is heated.
is attached to the insert Wa by an adhesive Wc.

[Problem that the invention aims to solve]

However, in such vacuum forming equipment, the adhesive applied to the surface of the insert Wa
If the skin Wb is not attached after drying the Wc to some extent before vacuum forming, the insert Wa and the skin Wb will be damaged.
Adhesive strength may decrease. Therefore,
Conventionally, in order to dry the adhesive Wc to some extent, a method has been adopted in which the adhesive Wc is applied to the surface of the insert Wa and then air-dried in that state. As a result, the vacuum forming cycle became longer, resulting in a significant decrease in productivity.

In addition, to improve productivity, inserts
After applying the adhesive Wc to the surface of Wa, the vacuum forming mold 55 is transported to a drying oven (not shown) and the adhesive is applied.
Although methods have been used to dry Wc to some extent,
In this case, not only a large-scale drying oven is required and a large investment in equipment is required, but also there is a problem that the quality of the molded product after vacuum forming increases.

Therefore, this idea was made to solve the above problems, and by combining a vacuum forming device and a hot air generator, it improves the vacuum forming cycle without making a large capital investment. At the same time, the aim is to reduce the quality variation of molded products.

[Means for solving problems]

That is, in the vacuum forming apparatus according to this invention, the vacuum forming mold is provided so as to be movable up and down by an elevator, and at least the entire vacuum forming mold is placed in the position where the vacuum forming mold is lowered by the elevator. A container is disposed in which the container can be accommodated, and a hot air generator for supplying heated air into the container is provided on the side of the container.

[Effect]

In such a vacuum forming apparatus, when attaching a skin to an insert, the elevator is operated to raise the vacuum mold to the outside of the container and stop, and the insert is placed on the vacuum mold. Next, an adhesive is applied to the surface of the insert, and the elevator is operated in reverse to lower the vacuum mold into the container, and the vacuum mold is housed in the container.

Next, a hot air generator provided on the side of the container is activated to supply the heated air into the container. At this time, the adhesive applied to the surface of the insert is heated by the heated air, and a portion of the organic solvent and the like contained in the adhesive is evaporated and dried instantly.

Thereafter, the elevator is operated in reverse to raise the vacuum mold, and the heated skin disposed above covers the entire vacuum mold. The vacuum mold is then evacuated, and the skin is adhered to the insert using an adhesive.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the vacuum forming apparatus according to the present invention will be described in detail based on the drawings.

Figures 1 to 3 are cross-sectional views of the vacuum forming apparatus according to the present invention, in which Figure 1 is a cross-sectional view when an insert is placed, and Figure 2 is a cross-sectional view when the adhesive applied to the insert is dry. FIG. 3 shows a cross-sectional view during vacuum forming.

In FIGS. 1 to 3, reference numeral 1 denotes a scissor lift which is an elevator, and this scissor lift 1 has a mounting table 2 disposed in the upper part and a support table 3 disposed in the lower part. Further, supports 2a are fixed to the lower surface of the mounting table 2 at the four corners, and supports 3a are fixed to the upper surface of the supporting table 3 at the portions of the mounting table 2 facing the supports 2a. Furthermore, an X-shaped leg body 4 is pivotally supported between each of the supports 2a and 3a, and is extendable and retractable.
The mounting table 2 is raised and lowered by a drive device (not shown).

Further, a vacuum forming mold 5 is fixed to the upper surface of the mounting table 2, and the upper surface thereof serves as a molding part 6 on which the insert Wa is placed. Furthermore, the inside of the vacuum forming mold 5 is a space 7, and the forming part 6
A large number of through holes 8 communicating with the space 7 are formed in the bottom portion 9, and a vacuum hole 11 is formed in the bottom portion 9 to which a vacuum pipe 10 communicating with a vacuum device (not shown) is connected.

The vacuum forming mold 5 is raised and lowered together with the mounting table 2 by the operation of the scissor lift 1. Above the raised position, a drive device (not shown) moves the vacuum mold 5 up and down. A clamp 12 is provided to stretch the skin Wb.

Further, a container 13 for accommodating the scissor lift 1 and the vacuum forming mold 5 is disposed at the position where the vacuum forming mold 5 is lowered and stopped by the scissor lift 1.
An opening 14 is formed in the upper part thereof, through which the scissor lift 1 and the vacuum forming mold 5 pass when going up and down. A lid 15 for opening and closing the opening is automatically or manually disposed on the upper surface of the container 13, and a large number of discharge ports 16 are formed in a part of the lid 15.

Further, a large number of discharge ports 16 and one supply port 18 are formed on the side of the container 13, and a hot air generator 19 is provided outside the supply port 18. In this hot air generator 19, a box 20 is fixed to the side of the container 13 so as to surround the supply port 18, and a large number of supply holes 20a are formed on the side. Further, a heater 21 is provided on the side of the container 13 of the box 20, and a large number of microm wires 21a connected to a current supply source (not shown) are housed inside the heater 21. Further, a blower 24 including a motor 22 and blades 23 is provided behind the heater 21. When a current is passed through the nichrome wire 21a of the heater 21 and the blower 24 rotates, heated air is supplied from the supply port 18 to the container 13.
It is now supplied internally.

In the vacuum forming apparatus configured as described above, when attaching the skin Wb to the surface of the insert Wa, the scissor lift 1 is operated as shown in FIG. The insert Wa is raised above the section 14 and stopped, and the insert Wa is placed on the forming section 6 of the vacuum forming mold 5. After that, a skin Wb cut to a size larger than that to be vacuum-formed is stretched over the clamp 12 and heated with a heater (not shown), etc., and an adhesive Wc is applied to the surface of the insert Wa. .

Next, as shown in FIG. 2, the scissor lift 1 is operated in reverse to lower the vacuum forming mold 5 and
The opening 14 is accommodated in the interior through the opening 14, and the opening 14 is covered with a lid 15.

Subsequently, the hot air generator 20 provided on the side of the container 13 is activated to supply heated air into the container 13. That is, current is applied to the nichrome wire 21a of the heater 21 provided in the hot air generator 19 to make it red-hot, and at the same time, the motor 22 is operated to rotate the blades 23. As a result, external air is supplied into the box 20 from the supply hole 20a, heated by the nichrome wire 21a, and supplied into the container 13 from the supply port 18 as heated air. Part is the outlet 17 of the container 1 and the lid 1
It is exhausted to the outside from the exhaust port 16 of 5. that time,
Adhesive applied to the surface of insert Wa
Wc is heated by the heated air, and part of the organic solvent contained in the adhesive Wc is evaporated, resulting in instant drying.

Thereafter, the lid 15 covering the opening 14 of the container 13 is removed, the scissor lift 1 is operated as shown in FIG. 3, the vacuum forming mold 5 is raised above the opening 14 of the container 13, and then stopped. let At the same time, the clamp 12 is lowered to cover the entire vacuum forming die 5 with the heated skin Wb. and,
After the skin Wb is stretched uniformly between the outer circumferential surface of the insert Wa and the contact portion of the outer circumferential surface of the vacuum mold 5, vacuum is drawn from the vacuum hole 11 of the vacuum mold 5. At that time, the heated epidermis Wb
contacts the vacuum forming mold 5 and the insert Wa,
While being cooled, the skin Wb is adhered to the insert Wa with the adhesive Wc.

This allows the surface of the insert Wa to be coated with the epidermis.
A molded product with Wb attached is obtained and transferred to the next step, a foam molding process, to form a finished product.

[Effect of idea]

As explained above, since the vacuum forming apparatus according to the present invention combines the vacuum forming apparatus and the hot air generator, it is possible to improve the vacuum forming cycle without making a large capital investment unlike in the past. There is an effect that can be done.

Furthermore, in the vacuum forming apparatus according to the present invention,
Since the adhesive applied to the surface of the insert can be instantly dried by the heated air, it is possible to reduce variations in quality of molded products after vacuum forming.

Furthermore, in the vacuum forming apparatus according to the present invention,
Since there is no need to constantly raise the temperature of the drying oven for drying the adhesive as in the conventional method, there is an effect that vacuum forming can be carried out economically.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the vacuum forming apparatus according to the present invention when an insert is placed thereon. FIG. 2 is a sectional view of the vacuum forming apparatus according to the present invention when the adhesive is drying. FIG. 3 is a sectional view during vacuum forming in the vacuum forming apparatus according to the present invention. FIG. 4 is a cross-sectional view of a conventional vacuum forming apparatus when an insert is placed. FIG. 5 is a sectional view of a conventional vacuum forming apparatus during vacuum forming. 1... Scissor lift, 5... Vacuum forming mold, 6...
...Molding part, 8...Through hole, 11...Vacuum hole,
12... Clamp, 13... Container, 14... Opening, 15... Lid, 19... Hot air generator, 20...
Box body, 21... Heater, 24... Air blower.

Claims (1)

[Scope of utility model registration request] A vacuum forming apparatus in which a vacuum forming mold is provided to be movable up and down by an elevator, wherein a container capable of accommodating at least the entire vacuum forming mold is disposed at a position where the vacuum forming mold is lowered. A vacuum forming apparatus characterized in that a hot air generator for supplying heated air into the container is provided on the side of the container.