JPH0386546A - Belt type pressure forming machine for laminated plate - Google Patents

Abstract

PURPOSE:To contrive the laminate having low cost and excellent property to be mass-produced by a method in which the laminate stock nipped by the steel belt composed of the steel belt with two rolls and at least three rolls is formed under pressurizing and heating, and then it is pressurized under cooling. CONSTITUTION:The laminate stock in which three vinyl chloride sheets as bass material 4 and two glass fiber mats as reinforcing material 5 are alternate by laminated, is transferred to the belt bite 16 of a forming machine from a stock-feeding device 1. The stock having entered the belt bite 16 is heated and softened by a heat medium roll 9. Then the arc length to be pressurized by the heat medium roll 9 is the quarter of the circumference from the belt bite, whereby the air dragged in and the bubbles generated in heating is discharged. The curved surface of the stock after the pressurizing process under heating is corrected into a plane and the stock enters cold working process. At the block 18 of cold pressurizing part, while the soft stock is held in plane under pressure, it is cooled and cured, and it becomes a product through the processes of width-cutting and length-cutting by a cutter 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to an apparatus for continuously manufacturing laminates.

[Prior art 1] There are two methods for making laminates: a batch method that uses plates, and a continuous method that uses coils. A double-belt method has been developed that uses two rolls of steel belt stacked one on top of the other as a continuous method made from coils. This method performs hot pressurization and cold pressurization using a parallel running section of a steel belt, but both the roll type and hydraulic pressure type developed so far have basic difficulties in the hot pressurization mechanism, making them practical. Although there is a roto-cure method for laminating soft sheets such as rubber and cloth, it cannot be used for laminated boards with poor flexibility, so it is excluded.

[Problem to be solved by the invention 1 ■) In the production of laminates, it is important to expel air bubbles in the hot pressing process, but with the conventional double belt method, it is difficult to eliminate air bubbles due to the mechanism and lack of pressurizing force. It is difficult to expel
If you want to make a bubble-free product, you will have to run the belt at an extremely low speed.

2) The conventional double belt hydraulic type cannot apply sufficient pressure due to the sealing performance of the hot press section.

In addition, the roll pressure type uses intermittent line pressure using multistage rolls, and cannot produce good products due to poor thickness, density, and surface gloss.

3) Both the hydraulic type and the roll pressure type have complicated structures, the hot press part is expensive, and in addition, it takes time and effort to manage the back side of the belt, making them difficult to use as practical machines.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide an apparatus for mass producing laminates with excellent performance at low cost.

[Means for Solving the Problems 1] The present invention consists of a two-roll steel belt and a laminated plate material sandwiched between two steel belts composed of three or more rolls, while running on a heating medium roll on the entry side. It is a double-belt type pressure forming machine that performs hot pressure forming while degassing, and then cold pressurizing while running in parallel.In particular, the first half on the heating medium roll is a degassing zone, and the second half is a fusion forming zone. The 9th stage cooling process is a belt-type laminate pressure molding machine that has a major structural feature that makes it possible to apply uniform and large pressure onto the heating medium roll. Inter-pressure is no different from the conventional method.

[Example 1 Examples of the present invention will be described below.

FIG. 1 is an explanatory diagram of the entire apparatus according to the present invention.

That is, it is composed of a material supply device 1, a belt type laminate pressure forming 1112 according to the present invention, and a cutting machine 3.

The material supply device 1 is a device that uniformly and continuously supplies the base material 4 and the reinforcing material 5. The laminated plate material that has entered the belt bit 16 is fused and pressed in the hot press section 17 on the heating medium roll 9 while being sandwiched between the upper steel belt 7 and the lower steel belt 8, and is then cold pressurized while running in parallel. It is molded and hardened in the pressure section 18 and extruded in a continuous shape.

Both ears are removed by a cutting machine 3, and the product is cut into a predetermined length.

FIG. 2 is a front view of a belt type laminate pressure forming machine 2 according to the present invention. The upper steel belt is the heating medium roll 9 on the entry side.
and the output side drive roll IO1 meandering adjustment roll 11. It is composed of an upper steel belt 7.

The heating medium roll 9 has a built-in device for keeping the surface temperature constant. The lower steel belt is composed of a tension roll 12 on the entry side, a drive roll IO1 tension and meandering adjustment roll 13 on the exit side, and the lower steel belt 8. or,
An auxiliary heater 14 and an auxiliary pressure roll 15 for thick plates are attached to the hot pressing section 17. Cold pressurization section 1
8 is a mechanism that gradually cools while applying pressure (roll type, hydraulic type,
A pneumatic pressure type is also included. The upper and lower driving rolls 10 are rotated synchronously by a motor 6, and a mechanism for delicately controlling the speed of the upper and lower rolls and keeping the belt tension constant is incorporated.

An example in which vinyl chloride and glass fiber are laminated using the apparatus according to the present invention will be described below.

A laminate material in which three vinyl chloride sheets as the base material 4 and two glass fiber mats as the reinforcing material 5 are stacked alternately is fed from the material supply device 1 to the belt bit 16 of the machine. The material entering the belt bite 16 is heated and softened by the heating medium roll 9. At this time, the pressing arc length by the heating medium roll 9 is 174 weeks from the belt bite.
A certain distance from the reinforcing material 6 is defined as a degassing zone, and the temperature and speed are controlled so that the reinforcing material 5 gradually immerses into the base material 4 while expelling air bubbles. Conveniently, the belt tension is weak in this range and the belt bite 16 is also directed upward, so air bubbles in the material can be removed efficiently.

After passing the degassing zone, the base material 4 is heated by the auxiliary heater 14.
The temperature is raised to near the melting temperature of the material, and in the latter half of the process, pressure is applied to complete fusion. In this part, the belt tension is stronger than in the first half, and strong pressure is applied, making it an ideal mechanism for hot-press forming of laminates.

In the example, the temperature of the material was set to 1701G in the degassing zone,
Good results were obtained by maintaining the fusion pressure zone at 180 degrees Celsius. After the hot pressing process, the material is straightened from a curved surface to a flat surface and then enters a cold pressing process. In the cold pressurizing section 18, the soft material is slowly cooled and hardened while being pressurized into a flat plate shape.
The product is made into a product through the process of width cutting and length cutting.

[Effects of the invention 1 The effects of the present invention are as follows.

l) Bubble-free long laminates can be produced.

Both the air contained in the material and the bubbles generated during heating can be expelled during the hot pressing process, making it possible to produce long laminates with no air bubbles, which was previously impossible.

2) Products with excellent thickness, strength, and density can be made.

Since the materials are gradually fused on a smooth arcuate surface and then finished with a strong reduction blade, products with excellent thickness, strength, and density can now be easily produced.

3) Equipment costs have been significantly reduced.

Compared to conventional double belt pressers, the hot press mechanism is incomparably simpler, resulting in significantly lower equipment costs.

4) No maintenance costs.

In the conventional double belt press machine, it is difficult to clean the back side of the belt and it is expensive, but the device according to the present invention has a simple structure and requires no maintenance cost, so that the operating rate of the device can be increased.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a laminate manufacturing apparatus incorporating a belt-type laminate pressure forming machine according to the present invention. FIG. 2 is a front view of a belt-type laminate pressure forming machine according to the present invention. 1. Material supply device 2. Belt type laminate pressure forming machine 3. Cutting machine 7. Upper steel belt 8. Lower steel belt 9. Heating medium roll 0. Drive roll 2. Tension roll. 3. Tension and meandering adjustment roll 4. Auxiliary heater 5. Auxiliary pressure roll patent opening hole Toyo Fujimoto picture rice

Claims (1)

[Claims] 1) Two rolls of steel belt on the upper stage and three rolls on the lower stage.
A steel belt consisting of more than one roll is arranged in an L-shape so that the top surface of the belt is pressed in an arc shape at the upper entrance roll part and parallel to the running part, and the entrance roll part is heated and hot-processed. A belt-type laminate pressure forming machine characterized in that the pressing and parallel running sections are configured to perform cold pressing while slowly cooling. 2) A belt-type laminate pressure forming machine characterized in that in 1) above, an auxiliary pressure roll is installed on the belt pressure surface of the entrance roll.