CN100361811C - Production methods of composite panels - Google Patents

Abstract

The invention discloses a production method of a novel composite board. Firstly, two wood-plastic boards are respectively placed on two wide surfaces of a mold cavity; side materials are arranged on the four side surfaces of the two wood-plastic boards to form a mold cavity between the side materials and the two wood-plastic boards; the mold temperature is heated to a normal temperature of about 80°C; a quantitative polyurethane foaming material is injected into the mold cavity for self-foaming; the aging time is controlled within 20 minutes; and the formed board is taken out. The production process of this method is simple, does not require too much processing equipment, has low investment and fast effect.

Description

Production methods of composite panels

technical field

The invention provides a production method of a board, specifically, the method is a production method of a novel composite board.

Background technique

There are many production methods of sheet metal in the market at present, but the sheet produced is only a semi-finished product and needs to be reprocessed to become a finished product. In this way, the sheet produced by the prior art needs to cut the sap material, which causes a lot of waste to the product. It has caused a waste of resources in our country, and the plate needs complicated processing to be formed into a concave-convex pattern.

The known production method of composite boards generally includes the following steps: put the boards into a plate press machine, apply colloid on the bonding surface of the boards to make them bond, and then carry out compression molding, take out the boards, and cut the sapwood according to the specified size. , and then process the board according to the needs of the product to make a door or wall partition with a pattern.

The above method increases the investment of equipment, troublesome operation and large material loss.

In addition, the products produced by this method are not firmly bonded and are prone to deformation for a long time. Therefore, it has become a common goal in the industry to directly process the formed composite board.

Contents of the invention

In view of the above-mentioned background of the invention, in order to meet the requirements of the industry, an object of the present invention is to find a method to directly produce shaped panels without further processing, doors and wall partitions with concave-convex patterns, and Long service life, no deformation, high strength, good heat insulation and sound insulation effect.

In order to realize the purpose of the present invention, this method comprises the following steps:

1. Place two wood-plastic panels on the two wide surfaces of the mold cavity;

2. Set sapwood on the four sides of the two wood-plastic panels, and form a mold cavity between the sapwood and the two wood-plastic panels;

3. Heat the mold temperature to about 80°C-100°C;

4. Inject the quantitative polyurethane foam material into the mold cavity to foam itself;

5. Curing, the curing time is controlled within 15-20 minutes;

6. Take out the formed sheet.

The wood-plastic board is obtained by grinding wood, bamboo and other processing wastes to powder form, after certain treatment, blending with high molecular polymers and passing through an extruder.

The mold can be directly in the shape of a door with a concave-convex pattern.

An injection port is arranged on the side of the mold, and vent holes are arranged around the mold. The sapwood is provided with a filling port corresponding to the injection port of the mould.

The polyurethane is injected into the mold cavity through an infusion machine.

In this method, after the polyurethane foam material is injected, the injection port is plugged with a plug.

This method uses the heat and pressure generated by polyurethane during foaming to soften the wood-plastic board and compound it with polyurethane materials. It does not require the use of adhesive products, which prevents the board produced by the adhesive from failing after a long period of use. The plate falls off, which brings unnecessary troubles to consumers.

Compared with the prior art, the present invention has the following characteristics:

1. The production process is simple, without too much processing equipment, less investment and quick results;

2. Polyurethane is injected into the mold cavity, which is easy to operate, no-cleaning, no waste, and easy for the operator to master;

3. Flexible production, any mold can be designed, suitable for mass production;

4. The fluidity of the material is good, the curing is fast, the working efficiency is improved, and it is sensitive to the process conditions such as mold temperature, material, and exhaust state.

Description of drawings

Fig. 1 is a process flow diagram of the method of the present invention;

Figure 2 is a schematic view of the appearance of the product produced by the present invention.

Detailed ways

As shown in Fig. 1 and Fig. 2, it is the process flow chart of this method, selects wood-plastic board as panel, and this wood-plastic board is processed waste straws such as timber, bamboo, etc. and grinds to powdery after certain treatment, and high Molecular polymer blending is made through an extruder. First, two wood-plastic boards 1 (800mm*3mm*2000mm) are respectively placed on the two wide sides of the mold cavity as panels, and sapwood is set on the four sides of the wood-plastic board. , the sapwood is the wood square 2, so that the wood-plastic board 1 and the wood square 2 form a cavity, the side of the mold is provided with a polyurethane foam material injection port, and vents are provided on the four sides. At this time, put the polyurethane foam material into the pouring machine, wait for pouring, adjust the mold temperature to 80°C, at this time, inject the polyurethane foam material into the cavity formed by the wood-plastic board 1 and the wood square 2 through the pouring machine When the poured polyurethane material reaches a certain amount, the pouring is stopped, and the injection port is blocked by a plug, and then the polyurethane material is matured, and the curing time is controlled at about 20 minutes, and the formed plate can be taken out.

Figure 2 is a schematic view of the appearance of the product produced by the invention. This method utilizes the heat and pressure generated by the polyurethane foaming process to soften the wood-plastic panel 1 and compound it with the polyurethane material, without the use of adhesive products, which prevents the board produced by the adhesive from failing after a long period of use , The plate falls off, which brings unnecessary troubles to consumers.

In addition, the mold can still be directly made into a door shape with a concave-convex pattern, so that the wood-plastic board can be softened during the polyurethane foaming process, and the pattern can be directly formed, and it can be directly formed into a door without further processing.

The production method can improve the production mode of the door from the previous single-piece production to mechanized scale production, which greatly improves the production efficiency and reduces the cost. Through the transformation of the mold cavity, doors with various concave-convex patterns can be directly molded at one time.

This method not only saves a large amount of wood for the country, but also provides a way out for the comprehensive utilization of wood, processing waste, straw, etc., and its economic and social benefits are immeasurable.

Obviously, according to the description in the above embodiments, the present invention may have many modifications and differences. The above is only a preferred embodiment of the present invention, and is not intended to limit the patent scope of the present invention; all other equivalent changes or modifications that do not deviate from the spirit disclosed by the present invention should be included in the above application Within the scope of the patent.

Claims (6)

1. A production method of composite plate, characterized in that: the method may further comprise the steps: a. Place two wood-plastic panels on the two wide surfaces of the mold cavity; b. Set sapwood on the four sides of the two wood-plastic panels, forming a mold cavity between the sapwood and the two wood-plastic panels; c. Heat the mold temperature to about 80°C-100°C; d. Inject the quantitative polyurethane foam material into the mold cavity to foam itself; e, ripening, the ripening time is controlled at about 15-20 minutes; f. Take out the formed sheet. 2. The production method of composite boards as claimed in claim 1, characterized in that: the wood-plastic boards are obtained by grinding wood and bamboo processing wastes to powder form after certain treatment and blending with high-molecular polymers through an extruder . 3. The production method of the composite board according to claim 1, characterized in that: the mold can be directly in the shape of a door with a concave-convex pattern. 4. The method for producing composite panels as claimed in claim 1, characterized in that: injection ports are provided on the side of the mold, and vent holes are provided around the mold. 5. The production method of the composite plate according to claim 1, characterized in that: the sap material is provided with a filling port corresponding to the injection port of the mould. 6. The method for producing composite panels according to claim 1, characterized in that: the polyurethane is injected into the mold cavity through a filling machine.

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