A rotary traction device for an injection molding machine

Abstract

The invention discloses a rotating traction device for an injection molding machine. The rotating traction device comprises a plurality of rotating guide rollers movably connected in a circular ring support, wherein each rotating guide roller comprises a roller body, connecting rods connected to the two ends of the roller body, and rolling bodies arranged at the head parts of the connecting rods, and each connecting rod is of a freely bent hollow structure. Through the mode, the shifting and the wrinkling of tubular film bubbles can be effectively reduced, and the flatness and the winding quality of a film can be improved.

Description

technical field [0001] The invention relates to the field of injection molding, in particular to a rotary traction device of an injection molding machine. Background technique [0002] In the production process of the traditional blown film, the raw material is melted and extruded by the blowing die, and blown into a cylindrical film bubble, and then the cylindrical film bubble is folded into a sheet by the herringbone splint and the traction roller of the traction device Double-layer film, the double-layer film bypasses the guide roller, and is finally wound up by the winding equipment. [0003] Because the existing traction roller is fixed in the ring-shaped bracket, it cannot be adjusted, and the friction between the cylindrical bubble and the traction roller will cause a small amount of movement of the tubular bubble on the traction roller, making the cylinder It is inevitable that the wall thickness of the film tube will be uneven in the shape of the film bubble. The p...

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Problems solved by technology

[0003] Because the existing traction roller is fixed in the ring-shaped bracket, it cannot be adjusted, and the friction between the cylindrical bubble and the traction roller will cause a small amount of movement of the tubular bubble on the traction roller, making the cylinder It is inevitable that the wall thickness of the film tube will be uneven in the shape of the film bubble. The position of the above-mentioned round and thick point or the thin point on the film tube is basically fixed, so that this thickness deviation becomes a systematic deviation. Thickness deviation will continue to accumulate and superimpose, making the thickness of the film roll after winding seriously uneven, causing bursting phenomenon, affecting the flatness of the film and the quality of winding

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