JPS5889366A - Molding device for laminated sheet - 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] The present invention relates to a laminated sheet molding device.

Conventionally, various types of decorative materials, laminated materials, etc. have been molded using flat plate press equipment, which has made it possible to mold only fixed-sized products. Molding using a roll press device was also considered as a molding device for continuous molding, but since roll pressure is repeatedly applied and released, continuous constant pressure cannot be obtained, and molded products with a ladle and a smooth surface finish are produced. There was a drawback that I couldn't get it.

The present invention relates to a laminated sheet molding device that solves such conventional problems, and in which two plates of laminating material are inserted between two running endless belts, and a continuous constant pressure is applied from around the belt using air pressure. The present invention also provides a laminated sheet molding apparatus characterized by a mechanism that performs heat treatment and molding.

The present invention will be described in detail with reference to drawings of embodiments.
FIG. 1 is a perspective view of one embodiment of the molding apparatus according to the present invention, in which the fixed frame has a width of 1400% -1 [I
E 1000%)
) t) is attached to the rotating shaft (b) through a bearing fitted into it and a hydraulic cylinder (to), and the other fixed frame (2) has a width of 1400% and a diameter of 1.
A 000t drive roll (2) is attached via a bearing into which a rotating shaft (b) is fitted. The Tensilon roll (i>) and the drive roll (2) are rotationally interlocked by an endless stainless steel belt (8) with a width of 1850% and a thickness of 2z, which is stretched with a tension of 3#/d.

Between the drive roll (2) and the Tensilon roll (1), there is an endless stainless steel belt (a) running in parallel M in one direction C, and at an intermediate position there is a length that allows the endless stainless steel belt (3) to go in and out. 1880%, opening width 7
There is an air pressurization chamber (4) with a length of 15W1 provided with a slit (9) of t and a compressed air inlet (6) and an automatic solenoid valve (6). Inside the pressurizing chamber (4) there is an endless stainless steel belt (8) and an electric heating plate (
6) is attached. A sealing material made of felt material is attached to the inside of the slit (9) to prevent air pressure from disappearing, and the end of the sealing material is attached to a fixing bar (B).
is fixed to. The sealing material is hung in a roughly U-shape, and the tip of the U-shape is partially covered with an endless stainless steel belt (
8) (in contact with the back side of the inlet (6). The compressed static electricity supplied from the inlet (6) is filled into the pressurizing chamber, and an automatic solenoid valve that opens and closes at 9 #/d and interlocks with the high-pressure compressor (8) (6) allows the air pressure to be maintained at around 9 #/d.Also, a sudden pressure increase is 11 kli/c.
This can be avoided with the safety valve (γ) activated at 4.

Maintaining air pressure in the pressurized chamber depends on the characteristics of the sealing mechanism, so various studies have been conducted, but as a sealing material, it has a low slip coefficient with the belt, has good anti-slip properties, and has a small air pressure loss rate. It is desirable to use a material that does not break and can change shape. Specific examples include the felt material in the above embodiments (this may be a material made of cotton woven fabric, synthetic woven fabric, etc., or a material impregnated or coated with wax, oil, etc. to improve sliding properties) Soft rubber-based materials, synthetic resin-based materials such as natural rubber, HBR, urethane resin (rubber), eboxy resin polyethylene, cloth, mats, non-woven fabrics, etc. made from fibers, natural fibers, synthetic fibers, carbon fibers, glass fibers, etc. Composite materials impregnated or laminated with polybutyropylene, silicone rubber (resin), and tofufluoroethylene resin are suitable. In addition, even if the sealing material is solid, if it is made of a material with extremely good slipperiness such as carbon block or oil-impregnated carbon block, it can be attached to one part of the slit as shown in Figure 4 along with a spring ■ that presses it against the belt. It's okay to be hit.

Further, in order to reduce the coefficient of friction between the back surface of the belt and the sealing material and improve the sealing performance, an automatic oil supply unit may be used to inject oil into the compressed air.

As for the heating means, as in the above embodiment, an electric heating plate oil heating unit (steam, oil, etc.) circulation, a far infrared lamp, and induction heating (microwave, high frequency, etc.) are used for heating, a tensine roll (1) and a driving roll. (2)
Means such as an electric heater or circulation of a heating medium (steam, oil, etc.) may be employed inside the heating element.

The endless belt wound between the drive roll (2) and the tensile roll (1) has a molding pressure of 8 to 15/1, 1
The material must be able to withstand molding heat of 00 to 180℃ and hydraulic tension of 1 to 10 to 9/14, and have good conductivity, and there must be no scratches, pinholes, etc. on the surface of the endless belt. A stainless steel belt, a steel belt, etc. are suitable as in the above embodiment. The endless held tension is necessary to hold the molded material inserted between the belts (to prevent slipping), to ensure the finish of the laminated sheet, or to rotate the Tenseen roll (1), and there is no need to make it unnecessarily excessive. do not have. Further, if the rotation speed is the same, the Tenseen Cool (1) itself may be directly driven. The running speed of the belt can be adjusted in the range of 1 to 20 m/min by changing the rotation speed of the drive rolls, etc.

Endless belts are made by welding or adhering sheet materials such as stainless steel or steel, and must be finished with a gloss level and smoothness equivalent to the surface of the sheet materials.

The air pressure applying mechanism is maintained by a high-pressure compressor (8) that has the necessary capacity to fill and replenish the 8 to 15 #/d air pressure required for molding as well as the air pressure lost from the gap between the sealing material and the endless belt. be done. It is desirable that the loss of air pressure in the sealing mechanism is 5% or less, and if it reaches 5% or more, the molding pressure will decrease to 8.
In addition to being difficult to maintain at ~15 #/d, it requires an excessively high-pressure compressor, which is undesirable as it affects the molding cost.

The molding conditions are greatly influenced by the molding material, especially the resin material.For example, if it is a thermoplastic resin material or a thermoplastic resin treated material, it can be laminated simply by heating and pressurizing, and high-speed molding can be performed in a short time. circle. On the other hand, when molding laminated sheets that are laminated at the same time as the resin material hardens, for example, when molding melamine resin sheets, diallyl phthalate resin sheets, unsaturated polyester resin sheets, urethane resin sheets, etc., the hardening time of the resin material and the curing temperature are important. It can be determined by taking into account the relationship with the molding flow characteristics, molding flow characteristics, etc. To increase the molding speed, a high-speed molding process can be adopted by using a resin material with a short curing time by extending the heating device, or by using high-temperature molding. The molding equipment is also used for thermoplastic resin materials and thermoplastic resin processing materials.

Processed paper, unprocessed paper, non-woven fabric, cloth, plywood, particle board, asbestos slate, or metal sheet (e.g. copper foil, aluminum) using thermosetting resin or thermosetting resin treated material only on the front or back side ) and laminated sheets,
Alternatively, it can be used for sheets etc. in which resin materials, resin treated materials, etc. are laminated, and it can also be applied to multi-laminated sheets with two or more layers. If the adhesion between the laminated layers is incomplete, an adhesion aid (primer) or an adhesive may be used at the laminated interface. In addition, if an uneven embossing layer is inserted between the endless belt and the resin-impregnated paper that will not be deformed or damaged by heat and pressure conditions, or if the surface of the endless belt is embossed and etched, the surface of the laminated sheet will have a wood grain pattern. It is possible to give an embossed shape.

Next, an example of forming a laminated sheet will be described. ``Impregnated paper (b) in which melamine resin with a low degree of condensation is impregnated with 80% weight ratio to the base material in mecellulose printing paper with a basis weight of 70 f/vf, and melamine resin with a basis weight of 150 f/vf. Between Wf kraft paper impregnated with epoxy acrylate resin containing 2% benzoyl peroxide as a hardening agent and the back side impregnated paper (Foundation) running at a speed of 8 m/min, Entress Stainless Steel L/X belt (8). and the air pressure is 9 to 10 kg/d in the air pressurization chamber (4).
Heating was applied at 160° C. for 4 minutes, and a long melamine resin decorative sheet (total) was formed.

The laminated sheet molding apparatus of the present invention is different from molding using a conventional flat plate press, and can be molded continuously, so it is possible to mold long objects, and since it pressurizes with air pressure instead of using a roll press, it is possible to mold long objects. It can be molded into a smooth surface without creating any steps or uneven shapes on the mold material, making it ideal for decorative materials and laminated materials where surface finish is an important characteristic of the product. Furthermore, since no movement friction occurs when the belt runs, there is no energy loss and the molding work can be carried out smoothly.

In addition, it can be used to mold multi-purpose laminated sheets, laminated materials, etc., as it can be used freely even if the number of laminated materials and materials are changed.

[Brief explanation of the drawing]

@1 Figure 1 is a perspective view of one embodiment of the molding device of the present invention, Figure 2 is a perspective view of the pressurizing chamber, Figure 8 is a structural sectional view showing the installation of the sealing material in the slit portion of the pressurizing chamber, @( The figure is a sectional view of the structure for other installations of the sealing material. 10.12... Sea material 13.14... Frame addition... Spring 21... Hydraulic pump patent applicant Aikanigyo Co., Ltd.

Claims (1)

[Claims] Two endless belts each wound between two rolls and running in parallel and in the same direction, a heating device provided above the endless belt, and an air pressurization chamber surrounding the endless belt and the heating device. A laminated sheet molding device comprising: