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Ultrasonic vibration microtube extrusion mould

An ultrasonic vibration, extrusion die technology, applied in the direction of household appliances, tubular items, other household appliances, etc., to achieve the effect of reducing flow resistance, uniform flow field distribution, and uniform melt flow

Inactive Publication Date: 2011-01-19
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the field of polymer microtube extrusion, especially the research on the structure design of ultrasonic vibration microtube extrusion die has not been reported at home and abroad.

Method used

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  • Ultrasonic vibration microtube extrusion mould
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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Specific embodiments of the present invention will be described in detail below in conjunction with technical solutions and accompanying drawings.

[0015] Observation of thermoplastic polyurethane (TPU) micro-interventional catheter extrusion efficiency and extruded product quality under the action of ultrasonic vibration, the embodiment steps are as follows:

[0016] step 1

[0017] Use a drying oven to dry the TPU at a certain temperature to remove moisture.

[0018] step 2

[0019] Start the extruder, use heating rings (7, 9, 13, 16, 29) and temperature sensors (22, 25, 27, 28) to heat each section of the extruder and each area of ​​the mold to the set temperature in stages, and Keep warm for a while.

[0020] step 3

[0021] Pour the dried TPU plastic particles into the barrel, and under the action of the extruder screw, the polymer melt flows vertically from the connecting pipe 30 into the head body 6, enters the flow channel through the splitter cone 8, and t...

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Abstract

The invention discloses an ultrasonic vibration microtube extrusion mould, belonging to the technical field of polymer extrusion moulding. The invention is characterized in that the mould comprises an ultrasonic-frequency power supply, an energy converter, a vibration rod, an amplitude transformer, a vibration head, a die head body, a spure sperader, a support plate, a positioning pin, a die supporting plate, a baffle plate, a fastening bolt, a washer, a die, a check ring, an integrated pressure / temperature sensor, a mandrel, an adjusting bolt, an air vent bolt, a heating ring, a temperature sensor, a connecting pipe and a flange plate. The mould adopts a feeding mode of which feeding direction is perpendicular to the extrusion direction; the vibration head adopts a spiral groove type structure and vibrates along the microtube extrusion direction; different spure speraders, mandrels and dies with different structural parameters can be changed according to demands; and the integrated pressure / temperature sensor is used to measure the changes of the pressure / temperature in the runner of the mould. By designing the ultrasonic vibration microtube extrusion mould capable of realizing vertical feeding, ultrasonic vibration is combined with the plastic microtube extrusion moulding, thus reducing flow resistance, increasing the production efficiency and obtaining the plastic microtube with high quality.

Description

technical field [0001] The invention belongs to the technical field of polymer extrusion molding, and relates to an ultrasonic vibration microtube extrusion die which uses ultrasonic vibration to reduce the extrusion flow resistance of polymer melt and improve extrusion efficiency and quality. Background technique [0002] The flow process of polymer melt in the micro channel of extrusion die has always been a key issue in the research of polymer extrusion processing. In macro extrusion processing, due to the large characteristic size of the flow channel, the flow resistance is relatively small, and the extrusion process is easy to realize. However, in the microtube extrusion process, the characteristic size of the flow channel is small, and the resistance caused by the viscoelastic properties of the polymer melt itself cannot be ignored, especially when the extrusion speed increases to a critical value, the surface of the polymer melt will produce " "Shark skin" phenomenon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/22B29L23/00B29C48/325
Inventor 赵丹阳金翼飞王敏杰宋满仓
Owner DALIAN UNIV OF TECH
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