JPS58134742A - Closely adhesive molding device and closely adhesive molding method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a method for closely adhering a film or sheet such as a surface protection film or a transfer film to the surface of a product such as the following. Conventionally, as a method of bringing a film into close contact with these uneven surfaces, a method has been used in which the film is heated and softened, and then the film is molded and brought into close contact with the uneven surface of the product using gas or liquid.

In addition, in order to prevent air from being drawn in when the surface of the product and the film come into close contact, the product, the film, and a heater for heating and softening the film are placed in a vacuum mold, and the film and product are brought into close contact in a vacuum state. A more hectic method is currently in use. Figure 1 shows the type of equipment currently used for this purpose.A moldable sheet (3) is stretched between the clay mold (11) and the lower mold (2).

The mold is closed with a mold clamping cylinder (8), and the sheet (3) is heated by a heater (4) installed in the upper mold (1).

At this time, the molded product (5) is placed on the product stand (6), the push-up cylinder (7) is lowered, and the sheet (3) and product (5) are not in contact with each other, and the upper mold ( 11
, the space between the sheet and the product in the lower mold is vacuumed, and the sheet (
3) is softened by the heater (4), the thrusting cylinder (7) is activated to bring the sheet (3) and the product (5) close to each other, and as necessary, bring the sheet (3) and the molded product into contact or further. After pushing up and stretching the sheet, a method is used in which air is pumped into the upper mold (11) to return atmospheric pressure, and if necessary, pressurized gas is introduced to form the sheet and the product.

This type of machine required two cylinders (8) (7), which required large i:"';jl, and was structurally complex.

In addition, with this device, the product and sheet are in close contact,
In other words, when pressurized gas is introduced into the upper mold (1) and the pressure is reduced inside the lower mold (2), the force applied to the product stand (6) is reduced because the pressure in the lower mold is reduced. Mold (11
Therefore, the clamping force of the mold clamping cylinder (
There was a problem in that a force greater than 81K was required, and the device to generate sufficient mold clamping force was complicated.

The present invention relates to a device that can perform the same operations using a single mold clamping cylinder in order to improve these drawbacks of the device.

That is, the present invention provides a product table having a vacuum suction mechanism, and a product table that is attached to the outer periphery of the product table and that can be moved up and down relative to the product table while maintaining sealing performance using a piston and cylinder or a spring mechanism. Outer mold, located at the top of this outer mold, is the outer mold □・.

It can be sealed by sandwiching a moldable sheet with it and can be transported 111
: Wind mechanism and heating device, : Upper mold and product stand with : or 1
Turn:.

A contact molding device that has a piston and a cylinder for moving the upper mold up and down, and a method of performing contact molding using this device. First, the molded product is placed on the molding machine, and a moldable sheet is placed on the outer mold. by moving the product table and the outer mold or the upper mold, and sandwiching the moldable sheet between the outer mold and the upper mold.

After the space between the upper mold and the formable sheet and the space between the product table, the outer mold, and the formable sheet are sealed, the space is vacuumed and the formable sheet is heated using a heating device. The molded product is heated and softened, moved relative to the outer mold, the molded product is brought into contact with or close to the moldable sheet, and a pressure of atmospheric pressure or higher is applied between the moldable sheet and the upper mold. This is a contact molding method characterized by introducing air to bring the moldable sheet into close contact with the molded product.

The present invention will be explained below with reference to FIGS. 2 to 13.

The outer mold αυ product stand (inner mold) (consisting of 1 α parts) allows the lower molds on which the molded product is placed to slide against each other and maintain a sealed state. The structure is such that the upper mold and outer mold are in contact and sealed, and the inner mold is 0.
0) has a vent hole αl between it and the molded product side, so that when the pressure inside the inner mold is reduced, the same pressure is applied to the surface of the molded product.

The outer mold circle and the inner mold 0I are slid by cylinders, springs, etc. Outer mold (11) and upper mold tl: 11
When the molded sheet 0 mm is sandwiched between them, the outer mold circle is slid by a spring cylinder or the like until the molded product (161 and moldable sheet ++5) do not come into contact with each other.

Upper mold α3 or lower mold αω is a mold clamping cylinder (121
Opens and closes by The cylinder 0z can be opened and closed by placing the lower pot mold (13) on the moving plate Qgl (Fig. 2), or by opening and closing the upper mold (Fig. 3). Upper mold 0
A heating device θ core such as a heater for heating the sheet 09 is installed inside the sheet 3.

The operation of the machine is shown in Figures 4 to 7.Open the upper mold 031 and lower mold 00)■, place it on the molded product (161 is the inner mold 00), and turn on the cylinder or spring.
When the outer mold 011 is moved and the moldable sheet H151 is stretched over the upper surface of the outer mold circle, the molded product 061 and the moldable sheet (1
Make sure that 51 does not touch. (Fig. 4) Next, the mold clamping cylinder O2 is operated, and the upper mold (13) comes into contact with the outer mold (111), and the moldable sheet (151 and the molded product) do not come into contact with each other, forming the moldable sheet α9. ``I'f: Close the mold to the width that can be sealed. (Immediately see Figure 5) Next, reduce the pressure inside the upper mold α3, the outer mold αυ, and the inner mold a. Then both sides of the formable sheet α9 are evacuated.

At this time, the pressure inside the upper mold a33 and the inside of the outer mold αυ must always be the same pressure. This is because if there is a pressure difference, the sheet will be pulled to one side.

The heating of the sheet α9 by the heating device I such as a heater may become uneven, and in severe cases, the sheet α9 may become uneven.) Q! 19 is broken.

When the moldable sheet 09 is heated and softened by the heater Q41, the molded product and the heated and softened sheet are brought into close proximity or in contact with each other by a mold clamping cylinder (121).

For this purpose, the force to slide the outer mold by the cylinder or spring OnK is the force required for sliding and the moldability seam)
The sealing force must be at least one sealing force that can maintain airtightness when the QS is sandwiched between the upper mold Q3 and the outer mold circle, and must be less than the mold clamping force of the mold clamping cylinder.

Next, the inside of the upper mold α3 is returned to atmospheric pressure, and if necessary, pressurized gas is introduced to mold the sheet α9 and bring it into close contact with the molded product Obl (No. 6-).

Next, upper mold α3. After returning the inside of the lower mold a to atmospheric pressure, the mold is opened, and the molded product Qe with the moldability sheet QS1 in close contact is emptied out.

Conventionally, when performing this type of contact molding, it was necessary to use a special machine with a special mechanism, but if the mechanism according to the present invention is utilized to create a mold device, a press that is generally available on the market can be used. It can be installed on a machine, the device can be simplified, and it also has a great cost advantage.

The following will explain based on examples.

<Example 1> The apparatus schematically described in FIG. 2 was mounted on a press having a compression of 50 tons. As a heater, a far infrared ceramic heater (10oW 8 pieces) is good.

Two cylinders were used to move the product table aυ and the outer mold (!1). In addition, the inner side of the mold is 400X40
It is 0m wide and t. A plastic injection molded product (manufactured by AH8) (6th model) equipped with a mold in the center of the product stand of the contact molding device
(Fig.
s OO/J)lEq) was closely molded with an adhesive layer interposed toward the plastic molded product. The molding method involves sandwiching a wood grain pattern sheet, tightening the upper and outer molds, and simultaneously heating the sheet while reducing the pressure in the upper and lower spaces through the sheet, so that the sheet temperature is approximately 120°C and the degree of vacuum in the upper and lower spaces is 10
After the temperature drops to below Torr, pressurized air of 9/cIIt is applied to 2 from the upper chamber, the heating sheet is placed along the molded product, and the temperature is about 10 to 1
After maintaining the pressure for 5 seconds, the upper and lower chambers were returned to atmospheric pressure, and the mold was opened to obtain a molded product. The end film of the molded product was cut off with a cutter, and the end portions were finished to obtain a final molded product. The obtained sheet molded product closely adhered to the plastic molded product (2) as shown in FIG. 10, and the adhesion strength was also very strong.

<Example 2> Using the contact molding apparatus described in Example 1 above, No. 11.1
The ABS molded product shown in Fig. 2 was placed with the concave portion facing upward, and a holding jig was installed in a fixed device, and the transfer foil shown in Fig. 13 was sandwiched between the upper and outer molds, and the same operations as in Example 1 were performed. After contact molding was performed and the product was taken out, the base film (c) was peeled off to obtain a product transferred onto a concave curved surface. These transfer-painted products had good physical properties (and good appearance).

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a conventional device, Figs. ), FIG. 10 is a cross-sectional view of the contact molded product, FIGS. 11 and 12 are cross-sectional views and front views of the glass molded product, and FIG. 15 is a cross-sectional view of the transfer sheet. (II (13... Upper mold (2HII+... Outer mold f31 f151... Sheet (4+041... Heater (5) (1bI... Molded product ((i: (In
)...Product stand (71+8102...Piston and cylinder (19...Vent hole ON...Piston and cylinder □Der or spring■...Plastic molded product (21;...Top coat layer (2 ';AC'C Itoin Wi (231'(261=・<-S film (241el...adhesive layer, 〒7・pine, to layer (
281,...Peeling layer (25)--Picture layer Patent applicant: Toppan Printing Co., Ltd. 42, Figure 1, Figure 2, Figure 3, Figure 8, Group a:: Figure 1Q--.

Claims (1)

[Claims] (1) A product stand with a vacuum suction mechanism, an outer metal that is in contact with the outer periphery of the product stand and can be moved up and down relative to the product stand while maintaining sealing properties using a piston and cylinder or a spring mechanism. Mold, at the top of this outer mold,
An upper mold that can be sealed by sandwiching a moldable sheet together with an outer mold and has a blower mechanism and a heating device, and a contact molding device that has a piston and a cylinder for vertically moving the product stand or the upper mold. (211 Place the molded product on the product table, place the moldable sheet on the outer mold, move the product table and the outer mold or the upper mold, and move the molded product between the outer mold and the upper mold. The space between the upper mold and the moldable sheet and the space between the product table, the outer mold, and the moldable sheet are sealed by sandwiching the moldable sheet between them, and then the rain space is vacuumed. The moldable sheet is heated and softened using a heating device, the product stage is moved relative to the outer mold, the molded product is brought into contact with or close to the moldable sheet, and the moldable sheet and upper mold are separated. A one-hole molding method characterized by introducing air at atmospheric pressure or higher pressure between the two to bring the moldable sheet into close contact with the molded product.