Thermal perforating device for plastic film

Abstract

The invention discloses a thermal perforating device for a plastic film. The thermal perforating device for the plastic film comprises a needle roll, a rubber roll and film supporting rolls, wherein the needle roll is a hollow roll; a plurality of needle components are arranged on the surface of the needle roll in the radial direction; a heating assembly is arranged inside the needle roll; heat is conducted to the needle components; the rubber roll is opposite to the needle roll; and the rubber roll and the film supporting rolls form a plastic film winding and conveying system. An unwinding device and a winding device are respectively arranged in the front and at the rear of the perforating device, the unwinding device is provided with a complete plastic film unwinding roll, a complete plastic film is fed into the perforating device and passes through space between the rubber roll and the needle roll of the perforating device, hot melting perforating is realized by the heated needle components on the needle roll, the winding device is provided with a perforated plastic film winding roll, and the plastic film which is perforated by the perforating device is wound on the winding roll. The thermal perforating device for the plastic film is simple in structure and easy to operate, a perforating density adjustment range is large, the plastic film is perforated by hot melting, penetration rate of holes is high, the film is not pulled during perforating, and therefore, the physical properties of the film are not affected.

Description

technical field [0001] The invention belongs to the technical field of plastic film processing, and in particular relates to a thermal punching device for plastic film. Background technique [0002] When plastic film is used in some specific fields, such as the production of composite concrete curing film, the mask needs to have good isolation, and the bottom film needs to have good water permeability. At this time, it is necessary to punch holes in the film. Existing plastic film punching has modes such as artificial punching, laser punching, mechanical punching. But all there is following defect: [0003] The position and size of manual punching are not easy to control, the manual labor intensity is high, the efficiency is low, and it is not suitable for large-scale production; [0004] The structure of laser drilling is complex, the cost is high, and the membrane needs to be unfolded, which takes up a lot of space; [0005] The mechanical punching tool is easily damage...

AI Technical Summary

Problems solved by technology

[0003] The position and size of manual punching are not easy to control, the manual labor intensity is high, the efficiency is low, and it is not suitable for large-scale production;

[0004] The structure of laser drilling is complex, the cost is high, and the membrane needs to be unfolded, which takes up a lot of space;

[0005] The mechanical punching tool is easily damaged, the punching is uneven, the hole penetration rate is low, and it can only punch a film with a relatively thin thickness. After the punching tool exits through the plastic film, it will form adhesion with the plastic film, and then If a part of the film waste is brought out, if the adhesion is greater, it will also tear the film, causing perforation and tearing, affecting the physical properties of the film, and causing the film to be thinned, elongated, and reduced in strength; and, it is necessary There is a special device to collect and process the waste generated by tool drilling, and the existing technology cannot realize ultra-wide, high-density and high-efficiency drilling

[0006] The Chinese patent application number 201220353438.4 discloses a heating device for a needle-roller type mulch punching machine, which heats the needle rollers for perforating the mulch, and realizes the hot-melt perforation of the mulch surface through the heated needle rollers. This method has more advantages than simple mechanical punching, and solves the defect of easy tearing film in mechanical punching, and does not need to set up additional waste collection devices, but the patent uses an infrared reflector to heat the needle roller. Defects, its structure is redundant, it is easy to interfere with the winding of the film, and there is a gap in the heating area, which is easy to cause uneven heating

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