Straight arm assembly

Abstract

The invention provides a straight arm assembly, and belongs to the technical field of rotational molding machine parts. The problem that gas easily leaks from a working arm of an existing rotational molding machine is solved. The straight arm assembly comprises a straight arm mechanism and a connecting assembly. Through the matching effect of the straight arm mechanism and the connecting assembly,a first gas and a second gas are directly conveyed into the connecting assembly, and the use of an external gas pipe is avoided, so that the occurrence of the phenomenon of gas leakage in the straight arm assembly in the collision process of the straight arm assembly and an external object is reduced; and secondly, in the process of conveying the first gas and the second gas into the connecting assembly at the same time, the straight arm mechanism rotates relative to the central axis of the straight arm mechanism, and the connecting assembly rotates relative to the central axis of the connecting assembly, so that in the process that the mold passes through a heating area or a cooling area, all faces of the mold are evenly heated or cooled, and the success rate of a rotational molding process is further improved.

Description

technical field [0001] The invention belongs to the technical field of rotational molding machine parts and relates to a straight arm assembly. Background technique [0002] Rotational molding machine is a kind of plastic equipment that uses plastic powder to make hollow plastic products. It mainly drives the uniformly heated rotational molding mold to rotate through a working arm, so that the molten plastic powder in the rotational molding mold is evenly distributed under the action of gravity. Coating and adhering to the entire inner surface of the rotomoulding mold, so that the rotomolding product is shaped, and after cooling and setting, the mold can be opened to remove the finished product. [0003] When the rotomolding machine heats the mold, the mold needs to be installed on the working arm of the rotomolding machine. Some deep cavity molds need an external gas to guide the surrounding heat to the mold surface because the heat cannot be transferred quickly. In order ...

AI Technical Summary

Problems solved by technology

[0003] When the rotomolding machine heats the mold, the mold needs to be installed on the working arm of the rotomolding machine. Some deep cavity molds need an external gas to guide the surrounding heat to the mold surface because the heat cannot be transferred quickly. In order to realize local thermal processing of the mould, further, this type of trachea is often tied to the working arm with cable ties or ropes. However, during the use of the working arm, it is easy to collide with external objects, resulting in the The air pipe on the upper surface is damaged, causing the gas in the air pipe to leak and unable to guide the heat to the mold surface

Images