Plastic dustbins have many applications in daily life. Due to their high precision, large production batches and good plasticity of materials, they are suitable for the production of plastic mold industry. The plastic trash can has the characteristics of corrosion resistance, alkali resistance, acid resistance and weather resistance. The box body is made of high-density polyethylene by one-time injection molding, and the appearance is smooth and easy to clean. The box can be used normally in the temperature range of -30 ~ 65°C; in order to make the periphery of the box withstand greater impact force, it can be designed to protrude from the front and rear corners of the box through reinforcing ribs.
Plastic trash cans are usually produced by trash can moulds. The principle is to continuously input granular plastic into the barrel of the molding machine to heat and melt, then pushed by the injection rod, introduced into the mold through the nozzle of the mold and the pouring system, and then cooled and solidified under pressure. In order to realize the normal stacking of the large trash can after the pedal is installed, it is necessary to make corresponding changes to the structure of the large trash can and the mold of the trash can.
The technicians provide a garbage can mold, which uses the cooperation of the concave cavity and the convex cavity to form the receiving cavity of the garbage can. The longitudinal cross-sectional projection of the receiving cavity is irregular, and the exposed part that affects the normal stacking of the garbage can is placed in the receiving cavity. The technical solution for realizing the waste bin mould is: a waste bin mould, including an inner mold and an outer mold, two opposite side walls of the outer mold protrude to form two protrusions, and two side walls of the inner mold are relatively concave to form two concave cavity; the lower opening of the concave cavity, the concave cavity is located at the bottom of the side wall; the boxing cavity of the trash can is formed between the protrusion and the concave cavity, and the protrusion is embedded in the concave cavity; the longitudinal section projection of the concave cavity and the convex cavity is different Regular. The waste bin mould uses the cooperation of the concave cavity and the convex cavity to form the storage cavity of the trash can. The two storage cavities are arranged symmetrically along the height direction of the box body.
One side of the irregular shape is a straight line, and the other side is a first inclined line, extending obliquely from one end of the straight line to form a second inclined line, one end of the second inclined line is connected to one end of the first inclined line, and the first inclined line The other end is connected to the other end of the straight line. The second oblique line is inclined from one end of the straight line to one side of the box body. The bottom wall of the inner mold is recessed to the top surface to form a mounting cavity, and the surface of the outer mold that matches the bottom wall is provided with a protrusion, which cooperates with the mounting cavity to form a molding cavity for installing a pedal on the dustbin; The bottom wall where the installation cavity is located is perpendicular to the side wall where the concave cavity is located.
The installation cavity runs through the length direction of the inner mold, and the installation cavity is arranged near one side in the width direction of the inner mold. There is also a handle cavity for forming the handle of the trash can between the inner mold and the outer mold. The plurality of handle cavities are divided into two groups and are located on opposite side walls of the inner mold; the handle cavity and the concave cavity are located on the same side wall of the inner mold superior. The inner mold is an integral inner mold with a solid structure, and concave cavities are symmetrically arranged on opposite side walls of the integral inner mold. The outer mold is a block-type outer mold, including multiple templates stacked in the height direction, four rib templates for forming ribs at the corners of the bottom of the box, and the four rib templates are placed in four of the cavities of the lowermost template. at the corner. The block-shaped outer mold of the waste bin mould is formed by stacking multiple templates, which can be made separately, which reduces the difficulty of processing. There is a pouring channel between the inner mold and the outer mold.
The concave cavity and the convex cavity cooperate to form the storage cavity of the trash can. The two storage cavities are arranged symmetrically along the height direction of the box body.