There are many types of garbage bin mould in daily life

Update:14-12-2019
Summary:

There are many types of garbage bin mould in daily life […]

There are many types of garbage bin mould in daily life. There are large and small garbage bin mould. Generally, large garbage bin mould are equipped with casters at the bottom. The edges of the buckets are reinforced by flanges and lid fixing holes. Plastic molds are usually used for injection molding. Molding, therefore, when designing the mold, it is necessary to design the mounting holes for installing casters and ribs to strengthen the flanging in the mold. Traditionally, the formation of these hole structures will be processed by the core rod structure.

At present, a Chinese patent discloses a core pulling mechanism for a wheel connection hole of a plastic Garbage bin mould, which mainly includes a mold upper and lower plates, the upper and lower plates are connected to a fixed template, and the fixed template is installed with a cavity insert and a lower composite plate. A movable template is installed on the movable template. A core insert is installed on the movable template. The mold insert cavity is formed between the core insert and the cavity insert. In order to form the caster hole at the bottom of the trash bin, two inserts are placed in the cavity insert. A core-pulling cylinder is respectively installed on the side outer wall, and the piston rod of each core-pulling cylinder is connected to the core-pulling rod, and the core-pulling rod is matched with the caster hole. Although the core-pulling rod structure can realize the formation of the caster hole, but due to the large trash can In order to ensure the structural strength, the injection molding at the caster hole will be relatively thick. At this time, the inner wall of the hole is relatively far away from the cooling pipe, so the cooling speed is slower. It is easy because the plastic is not completely cooled when the core rod is withdrawn. Adhesion to the core rod causes damage in the hole, resulting in drawing, burrs, etc.
A large-scale trash can injection mold includes upper and lower plates, a gate is installed in the upper plate, a fixed template is installed under the upper plate, a runner is made in the fixed template, and a fixed frame is installed under the fixed template. A movable mold frame is installed on the double plate, and a movable mold core is installed in the movable mold frame. The gap between the movable mold core and the fixed mold frame constitutes a cavity of the trash can. The fixed mold frame is provided with a core rod for forming caster holes. A core-pulling cylinder for driving the movement of the core-pulling rod. The core-pulling rod is provided with a liquid injection hole arranged along the length direction of the core-pulling rod and used to inject cooling water.

Through the above technical solution, after the garbage bin mould is injection-molded, the core rod accelerates the cooling speed of the inner wall of the caster hole due to the cooling liquid in its injection hole. When the core rod is withdrawn, the hole wall has solidified and formed, which can effectively avoid When the core pulling rod is pulled out, the hole wall is damaged; when the core pulling rod is pulled out, the mold frame is driven by the injection molding machine to move the mold frame downward and separate from the fixed mold frame, and then the trash can is demolded to ensure the integrity of the trash can. Sex.