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A composite board and process technology, which is applied in the field of TPU-ABS composite board co-extrusion technology, can solve the problems of increased fluidity of TPU, achieve strong interlayer bonding, high processing efficiency, and prevent poor processing.
Inactive Publication Date: 2017-02-15
KUNSHAN HENGGUANG PLASTIC PROD
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When the temperature in the mold is close to the melting point of ABS, the fluidity of TPU will increase, and the TPU will not be well spread on the surface of ABS when it is finally discharged, forming many "islands"
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[0048] The present invention will be described in further detail below in conjunction with specific embodiments.
[0049] Such as figure 1 and image 3 Shown, a kind of TPU-ABS composite plate co-extrusion mold of the present invention comprises first mold body 1, second mold body 2 and the 3rd mold body 3, and first mold body 1 has an inner runner 11 and two Side runner 12, the inner runner 11 extends to the front edge of the first mold body 1 and forms a flat inner flow slit (not marked), extending from the outlet of the inner runner 11 to both sides for installing the second mold body 2 respectively and the two slopes of the third mold body 3, the second mold body 2 and the third mold body 3 are separated to form a flat extrusion slit 203; the interface between the second mold body 2 and the first mold body 1 is provided with an external The closed first side flow slot 21, the first side flow slot 21 communicates with the side flow channel 12; the interface between the th...
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Abstract
The invention belongs to the technical field of plastic injection molding, and relates to a TPU-ABS composite board co-extrusion technology. According to the technology, an inner flow seam located in a first mold body, a first side flow seam located on the interface of a second mold body and the first mold body, a second side flow seam arranged on the interface of a third mold body and the first mold body and an extrusion seam formed by the second mold body and the third mold body in a spaced manner are included; the inner flow seam, the first side flow seam and the second side flow seam are joined on the inner side of the extrusion seam; the position, close to the inner flow seam, of the first mold body is provided with a first heating pipe, the position, close to the first side flow seam, of the second mold body is provided with a second heating pipe, and the position, close to the second side flow seam, of the third mold body is provided with a third heating pipe. The temperature of TPU and the temperature of ABS are controlled in a divided manner, it is ensured that a co-extrusion composite board has the higher machining efficiency and has the firm interlayer combination force, and poor machining can be prevented.
Description
technical field [0001] The invention relates to the technical field of plastic injection molding, in particular to a TPU-ABS composite board co-extrusion process with high production yield. Background technique [0002] TPU (Thermoplastic polyurethanes, thermoplastic polyurethane elastomer rubber) has a wide range of hardness (60HA-85HD), wear resistance, oil resistance, transparency, good elasticity, etc. It is widely used in daily necessities, sporting goods, toys, decorative materials and other fields. [0003] ABS (Acrylonitrile Butadiene Styrene plastic, acrylonitrile-butadiene-styrene plastic) is one of the five major synthetic resins. It has excellent impact resistance, heat resistance, low temperature resistance, chemical resistance and electrical properties. Processing, stable product size, good surface gloss, etc., easy to paint and color, and can also carry out secondary processing such as surface metal spraying, electroplating, welding, hot pressing and bonding, ...
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