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Triple extrusion die head with low center

A three-layer co-extrusion, low-center technology, applied in the field of plastic film manufacturing machinery, can solve the problems of long time required to replace resin or color, reduction of effective height of upper traction, and increase of manufacturing difficulty of extruder, so as to reduce polymer The effect of stock, layer thickness uniformity and overall film thickness improvement, flow distribution and flow rate uniformity

Inactive Publication Date: 2010-03-17
武汉新中德塑机股份有限公司
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Problems solved by technology

This will increase the possibility of polymer decomposition in the die, the time required to change the resin or color will be longer, and the relative distance between the die outlet and the center line of the main traction will be short, that is, the effective height of the upper traction will be reduced, and the cooling efficiency will be reduced. , the height of the center of the extruder is different, which increases the difficulty of manufacturing the extruder

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  • Triple extrusion die head with low center

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[0013] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation to the present invention, and are only used for illustration. At the same time, the advantages of the present invention will become clearer and easier to understand.

[0014] Referring to the accompanying drawings, it can be seen that a low-center three-layer co-extrusion die head of the present invention, its inner layer feed port 12, middle layer feed port 13, and outer layer feed port 14 are located on the same plane whose center height is H, so Said inner layer feed port 12 is successively connected by the channel in the sealing sleeve 8, the channel on the outer layer sub-fluid 1, the channel formed between the connecting body 4 and the right plug 5, and the channel on the inner layer sub-fluid 3 Formed a channel leading to the inner spiral body 7; the middle layer feed port 13 is sequentially composed ...

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Abstract

The invention discloses a triple extrusion die head with a low center, wherein, an inner layer feed inlet (12), a middle layer feed inlet (13) and an outer layer feed inlet (14) are positioned in a same plane and the center-height of which is H. The invention overcomes the defects that the runner of the existing triple extrusion die head has long length, the amount of polymer accumulated in the center of a die is large, the time needed for changing the resin or the color is long, and the cooling efficiency is low and the like. The distribution design of the invention reduces the height of thedie head, shortens the length of the runner, improves the cooling efficiency, ensures more convenient operation of the film pulling, reduces the amount of polymer accumulated in the die head, and leads the changing of the material or the color more rapid.

Description

technical field [0001] The invention relates to the field of plastic film manufacturing machinery, more specifically it is a low center three-layer co-extrusion die head. Background technique [0002] Most of the feeding methods of the existing three-layer co-extrusion dies use concentric core sleeves to feed in layers. The centerlines of the three-layer feeding ports are not on the same level, and there is a certain height difference, which requires extrusion of each layer. The height of the machine center is different. Such a feeding method increases the length of the flow channels of each layer, the stock of polymer in the center of the mold is high, and the overall height of the mold is high. This will increase the possibility of polymer decomposition in the die, the time required to change the resin or color will be longer, and the relative distance between the die outlet and the center line of the main traction will be short, that is, the effective height of the upper...

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Application Information

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IPC IPC(8): B29C47/20B29C55/28B29C48/32
Inventor 谢国祥向友生陈卫兵严明武
Owner 武汉新中德塑机股份有限公司
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