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Multi-layer co-extrusion film-blowing equipment and multi-layer co-extrusion film-blowing technique

A multi-layer co-extrusion and process technology, which is applied in the field of plastic product production equipment and plastic product production technology, can solve the problems of floating point easy to fall off, high cost, low adhesion between floating point and smooth surface, etc.

Active Publication Date: 2010-10-13
GUANGDONG JINMING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing methods of forming a rough surface include spraying molten plastic material irregularly on the smooth surface of the composite plastic film to form irregular floating points on the surface, and using flower rollers to press out concave-convex points on the surface of the composite plastic film. The above method is not only complicated in process and high in cost, but also has low adhesion between the floating point and the smooth surface, and the floating point is easy to fall off

Method used

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  • Multi-layer co-extrusion film-blowing equipment and multi-layer co-extrusion film-blowing technique
  • Multi-layer co-extrusion film-blowing equipment and multi-layer co-extrusion film-blowing technique
  • Multi-layer co-extrusion film-blowing equipment and multi-layer co-extrusion film-blowing technique

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Effect test

Embodiment 1

[0029] figure 1 , figure 2 , Figure 4 As shown, an embodiment of the present invention is a three-layer co-extrusion blown film equipment, including a base layer extruder 17, two surface layer extruders 18, a film blowing head 3, a cooling air ring 5, and a bubble stabilizer 7 , Herringbone splint 8, first traction device 9, cutting device 10, unfolding device 11, flattening device 12, film storage device 13, second traction device 14, coiling device 15. The film blowing head 3 is provided with an annular die opening gap 33 and three annular flow channels, wherein two annular flow channels (the annular flow channels positioned inside and outside) are surface layer annular flow channels 32, and the other annular flow channel (the one located in the middle Annular flow channel) is the base annular flow channel 31, each surface layer annular flow channel 32 is correspondingly connected to one of the surface layer extruders 18, and the base layer annular flow channel 31 is cor...

Embodiment 2

[0032]Embodiment 2 is a three-layer co-extrusion blown film equipment. The blown film head 3 is provided with two surface layer annular flow channels 32 and a base layer annular flow channel 31. Each surface layer annular flow channel is connected to a surface layer extruder correspondingly. Each base annular channel is correspondingly connected with a base extruder, and each surface extruder and base extruder are respectively provided with a barrel and a screw, and the screw is provided with a feeding section, a compression section, and a metering section. In addition, among the two surface layer extruders, the screw of one surface layer extruder is also equipped with an air-filling section, and the side wall of the barrel corresponding to the position of the air-filling section is also provided with a gas input port, and the gas input port is connected to a gas The input device; the screw of the other surface layer extruder does not have an air filling section. In embodiment...

Embodiment 3

[0035] Embodiment 3 is a five-layer co-extrusion blown film equipment, the film blowing machine head is provided with two surface layer annular flow channels and three base layer annular flow channels, and the screws of the two surface layer extruders are equipped with air-filling sections, and the air-filling The screw groove depth of the section is equivalent to 5 times the screw groove depth of the metering section, and a gas input port is opened on the side wall of the barrel at the corresponding position of the gas filling section, and the gas input port is connected to a gas input device. The corresponding surface annular runners of the two surface extruders are provided with detachable arc-shaped small stoppers. The three-dimensional shape of the arc-shaped small stopper is tile-shaped, and can be installed in the annular flow channel when needed.

[0036] In the above embodiment, the depth of the screw channel in the air-filling section can be designed to be 7 times or...

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Abstract

The invention discloses multilayer coextrusion film blowing equipment. A surface-layer extruder and a base layer extruder are respectively provided with a material barrel and a screw rod, each screw rod is sequentially provided with a feeding section, a compression section and a metering section, wherein the screw rod of one or two surface layer extruders is also provided with a gas adding section behind the metering section, the screw channel depth of the gas adding section is bigger than screw channel depth of the metering section, a gas input port is also arranged on the side wall of the material barrel corresponding to the gas adding section, and the gas input port is connected with gas input equipment. The invention also discloses a multilayer coextrusion film blowing technology. Because the equipment and the technology can mix stable gas into melted materials of one or two surface layers, a produced composite plastic film surface layer is provided with dense small pores, therebya rough surface with single or double surfaces can be directly formed.

Description

technical field [0001] The invention belongs to the technical field of plastic product production equipment and plastic product production technology, and specifically relates to a multi-layer co-extrusion blown film equipment and a multi-layer co-extrusion blown film process. Background technique [0002] The multi-layer co-extrusion composite plastic film produced by the multi-layer co-extrusion blown film equipment has upper and lower surface layers and several layers of base layers (middle layers). The film blowing head of the multi-layer co-extrusion blown film equipment is equipped with several annular flow channels. The number of annular flow channels is the same as the number of layers of composite plastic film co-extrusion. There is an extruder corresponding to each annular flow channel. Each extruder is equipped with a barrel and a screw, and the screw is sequentially equipped with a feeding section, a compression section, and a metering section according to the fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C55/28B29C47/60B29C47/20B29C47/08B29C47/92B29C47/06B29C48/21B29C48/32B29C48/49B29C48/92
CPCB29C47/6062B29C47/6093B29C47/64B29C47/56B29C47/6018B29C47/0054B29C48/0017B29C48/49B29C48/53B29C48/575B29C48/67B29C48/21
Inventor 陈新辉黄虹李浩林梓生孙伟龙蒋中成袁汉清林永忠
Owner GUANGDONG JINMING MACHINERY
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