Film blowing machine with improved extrusion mechanism

Abstract

The invention provides a film blowing machine with an improved extrusion mechanism. The film blowing machine comprises the extrusion mechanism, a film blowing mechanism, a drawing mechanism and a winding mechanism, wherein the extrusion mechanism is composed of a hopper, an extrusion cylinder, a screw rod and a transmission motor; the extrusion cylinder is provided with a feeding hole and a discharge hole; the hopper is arranged above the extrusion cylinder and is connected with a feeding hole of the extrusion cylinder; a feeding valve is arranged between the hopper and the feeding hole; the hopper is composed of a hopper cylinder body and a dust cover which covers the hopper cylinder body; the hopper cylinder body is composed of a hopper outer cylinder and a hopper inner cylinder; heating pipes are embedded between the hopper outer cylinder and the hopper inner cylinder; at least one rotary frame for stirring a material is arranged in the hopper inner cylinder; the film blowing mechanism is composed of a die head, an air ring and a rack; the air ring is arranged on the die head; a discharge hole of the extrusion mechanism is connected with the die head of the film blowing mechanism; the die head and the air ring are fixedly arranged at the lower end of the rack separately; the drawing mechanism is arranged at the upper end of the rack; and a film blown out from the die head is transported to the winding mechanism through the drawing mechanism.

Description

technical field [0001] The invention belongs to the technical field of plastic films, and relates to a film blowing machine, in particular to a film blowing machine with an improved extrusion mechanism. Background technique [0002] The film production mainly adopts a film blowing machine. The raw material is heated into a molten state through an extrusion mechanism and extruded, and the film bubble is blown out by compressed air to make a film, and finally wound into a cylinder through a winding mechanism. [0003] The processing of raw materials affects the product quality of the film. All raw materials entering the extrusion mechanism must be completely removed from moisture and dust, so the raw materials need to be dried and crystallized in the early stage. However, the drying and crystallization process in the early stage is relatively large, and uneven drying is prone to occur, and the process of raw materials being transported to the extrusion mechanism is easily affe...

AI Technical Summary

Problems solved by technology

However, the drying and crystallization process in the early stage is relatively large, and uneven drying is prone to occur, and the process of raw materials being transported to the extrusion mechanism is easily affected by the surrounding environment and damp

[0004] The feeding hopper of the existing extrusion mechanism is open, and the dust in the air is easy to enter and adhere to the raw materials; secondly, the raw materials in the hopper are directly in contact with the oxygen and moisture in the air during the processing, and the raw materials that have been dried in the early stage The mixed modifier components are sensitive to oxygen and moisture in the air, not only easy to adhere to the hopper, but also have a direct impact on the performance of the film

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