Automatic windshield for extrusion head line inlet

Abstract

The invention discloses an automatic air stop device for an extruder head wire feed port. The automatic air stop device comprises a square metal box and a metal cover plate installed on the square metal box; the square metal box is provided with a metal bottom plate, an upper metal side plate, a lower metal side plate, a left metal side plate and a right metal side plate, the upper metal side plate, the lower metal side plate, the left metal side plate and the right metal side plate are connected with the metal bottom plate, a metal air stop plate is installed at the roughly central position, in the length direction, of each side plate through fixedly-installed springs, and the surfaces of the four air stop plates are all parallel to the surface of the bottom plate and are located in different planes; a wire feed hole and a wire discharge hole with the same diameter as the wire feed hole are formed in the central position of the cover plate and the central position of the bottom plate reactively, the width of each air stop plate is equal to the diameter of the wire feed hole and the wire discharge hole, an arc groove is formed in the top of each air stop plate, a wire passing channel is formed among the arc grooves in the tops of the four air stop plates, and the center line of the wire feed hole, the center line of the wire discharge hole and the center line of the wire passing channel are located in the same straight line. The four metal air stop plates of the automatic air stop device can stretch and retract automatically according to the outer diameter of a wire core, and thus the automatic air stop device can adapt to feed of wires of different specifications and dimensions without frequent replacement.

Description

technical field [0001] The invention relates to a wind-shielding device, in particular to an automatic wind-shielding device for the wire inlet of an extruder head. Background technique [0002] In the extrusion process (insulation layer extrusion, inner and outer sheath extrusion) in the cable preparation process, the extrusion material is drawn into a long tube and pulled forward together with the core. When the long tube is drawn to a certain length, it is attached to the core to complete the extrusion process. In the actual extrusion production process, the hardness and fluidity of the extruded material directly affect the qualified rate of the product, and often the stretching tube is too long, resulting in glue breakage. For this reason, it is necessary to control the length of the tube to allow the extruded material to adhere to the wire core in advance. At present, the most effective and concise way is to vacuumize. Install an exhaust fan before the extruder head t...

AI Technical Summary

Problems solved by technology

[0003] Since the size of the wire inlet hole of the extrusion head is larger than the size of the wire inlet, when the air in the extrusion head is sucked by the exhaust fan, a large amount of external air will enter through the wire inlet hole of the extrusion head along with the wire inlet. into the extruder head, resulting in the inability to complete the discharge of the gas inside the extruder head. At present, the usual method of controlling the entry of external air into the extruder head is to install a device with and A hard paper shell with a matching outer diameter of the incoming line, through the hard paper shell to block the external air from entering the extruder head through the incoming line hole

Using a cardboard shell as a windshield has the following disadvantages: 1. When the paper shell rubs against the wire core, paper dust will be generated, and the paper dust will adhere to the wire core, which will cause the entire cable to bulge, and may cause The cable is broken down during use, which greatly reduces the qualified rate of the product; 2. In the extrusion process, because the outer diameter of the incoming wire is different, it is necessary to replace the windshield paper shell according to the outer diameter of the incoming wire. There are various sizes and specifications, and it is necessary to frequently replace the cardboard case for wind protection, which affects the production efficiency

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