Injection molding method of stone-based composite material

Abstract

The invention provides an injection molding method of stone-based composite material and equipment thereof, wherein the method comprises the following steps: a. putting raw materials into a charging device and then pushing the raw materials into a preforming machine barrel of a preforming device by a pressing component in the charging device; b. keeping the temperature being between 15° C. and 55° C. and compacting the raw materials with the rotation of a preforming screw and transporting the raw materials into a collecting block; c. injecting the raw materials into a mold through a mold gate under the injection force of 50 Mpa to 180 Mpa; d. keeping the temperature of the mold between 140° C. and 200° C. and curing time between 40 seconds and 300 seconds; and e. opening the mold to get the product. The invention has the advantages of simple production process, high acceptance rate of products manufactured, high production efficiency and low production cost. The product has the advantages of high mechanical strength, good fire resistance, thermal stability, corrosion resistance and electrical property, low cost and the like. The product is capable of substituting the majority of thermoset plastics and thermoplastics, thus reducing the usage amount of plastic products and providing powerful support and safeguard for creating resource-conservation and environment-friendly industry.

Description

FIELD OF THE INVENTION[0001]The invention relates to an injection molding method and equipment thereof, in particular to an injection molding method of stone-based composite material.BACKGROUND OF THE INVENTION[0002]It is well known that plastics are the product of the petrochemical industry and obtained from non-renewable petroleum resources. Plastic products have been applied in domestic economic fields, such as automobiles, household electrical appliances and articles of daily use, and they are essential to society.[0003]However, petroleum leads to environmental deterioration, greenhouse gas effect and white pollution whilst providing considerable organic raw materials and energy. As the use of petroleum for development is at the expense of environmental destruction and the availability of petroleum resources is limited, it is urgent to cast off petroleum.[0004]Meanwhile, a great deal of stone exists in the natural world and especially many stones that are produced as biproducts ...

AI Technical Summary

Benefits of technology

The invention provides an injection molding method and equipment for producing stone-based composite materials efficiently at low cost with stable quality. The method involves putting raw materials into a charging device, keeping the temperature of the preforming device between 15°C and 55°C, and compacting the raw materials with the rotation of a preforming screw. The method can use a variety of raw materials, including stone and unsaturated polyester, fiber glass, and additives. The equipment includes a preforming device, a sealing device, and an injection device. The technical effects of the invention include improved efficiency and stability of production, reduced cost, and improved quality of the finished product.

Problems solved by technology

However, petroleum leads to environmental deterioration, greenhouse gas effect and white pollution whilst providing considerable organic raw materials and energy.

As the use of petroleum for development is at the expense of environmental destruction and the availability of petroleum resources is limited, it is urgent to cast off petroleum.

Such stones are required to be excavated and processed in advance, with high consumption of labour and material resources.

But excavated stones cannot be utilized and can only be disposed of as waste, which has an impact on the environment.

The method for making the products with stones is a complex production process with low acceptance rate of the products, extremely low production efficiency, high production cost and difficulty in mass production.

The amount of stones consumed is quite limited.

Such use of stones cannot completely use up the existing stones nor replace plastics at a large scale.

With the forgoing method for producing products with stones, the products obtained have poor and unstable quality.

The method cannot be applied to produce products with high quality and the low-class products obtained can only be used in cases where high quality products are not required.

Restricted by compacting methods and molds, methods for making products with stones are difficult, especially when the products have a complex structure and special surface treatment, or precise parts such as automobile components or electrical units.

Until now, people considered that only the shaking casting method can be used for making products with stones, hence it is still in the lag phase without advancement.

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