Non-return ring free multiaxial volume pulse injection forming method and device

An injection molding device and injection molding technology, which are applied in the injection molding of plastic blending modified materials and long-fiber online compounding materials, and in the field of injection molding, which can solve the problems of poor plasticization mixing effect, high energy consumption, and long thermomechanical process, etc. question

Inactive Publication Date: 2017-03-15
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of the commonly used injection machines such as poor plasticizing and mixing effect, uneven distribution of material residence time, and the need for a check device with a complex structure, and to provide a multi-axis volume pulsation injection molding method without a check ring To solve the problems of poor mixing effect, long thermomechanical process, and high energy consumption of conventional injection molding methods and devices for plastic materials, and to realize volume pulsation injection molding processing of plastic modified materials and long-fiber online compounding materials without a check loop method

Method used

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  • Non-return ring free multiaxial volume pulse injection forming method and device
  • Non-return ring free multiaxial volume pulse injection forming method and device
  • Non-return ring free multiaxial volume pulse injection forming method and device

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Embodiment 1

[0038] refer to figure 1 , a multi-axis (three-axis) volume pulsation injection molding device without check ring, including oil motor 1, power distributor 2, first locking round nut 3, motor seat 4, spline sleeve 5, plunger rod 6. Injection cylinder 7, injection piston 8, second locking round nut 9, barrel 10, first eccentric rotor 11, second eccentric rotor 12, barrel head 13, nozzle connection seat 14 and nozzle 15; oil motor 1 It is connected with the power distributor 2 through screws, and the power distributor 2 is fixed on the motor base 4; the plunger rod 6 of the injection cylinder, the motor base 4 and the injection piston 8 are respectively locked by the first locking round nut 3 and the second locking nut. The round nut 9 is connected, the injection piston 8 is placed in the oil cylinder 7, and the plunger piston 8 reciprocates in the oil cylinder under the action of oil pressure; the motor seat 4 is installed on the guide rail of the frame, driven by the hydraulic...

Embodiment 2

[0047] The main difference between embodiment 2 and embodiment 1 is the number of rotors. In embodiment 1, there are 3 eccentric rotors, while in embodiment 2 there are only 2 eccentric rotors. refer to Figure 6 , the multi-axis (two-axis) volume pulsation injection molding device without non-return ring in this embodiment mainly includes an oil motor 16, a power distributor 17, a first locking round nut 18, a motor seat 19, a spline sleeve 20, a column Plug rod 21, injection cylinder 22, injection piston 23, second locking round nut 24, double hole barrel 25, first eccentric rotor 26, second eccentric rotor 27, barrel head 28, nozzle connecting seat 29, nozzle 30 and other parts. The oil motor 16 and the power distributor 17 are connected by screws and fixed on the motor base 19; the motor base 19 is connected with the injection plunger rod 21 and the injection piston 23 through the first locking round nut 18 and the second locking round nut 24, The plunger piston 23 is pl...

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Abstract

The invention discloses a non-return ring free multiaxial volume pulse injection forming method and device. In the method, eccentricity exists between at least two mutually engaged eccentric rotors arranged in a material barrel, spiral sections as well as straight sections and the axial direction. When the eccentric rotors rotate, periodical change occurs to the radial distance between the two adjacent eccentric rotors, periodical change occurs to the volume of the closed space formed among the outer surfaces of the eccentric rotors, an inner hole of the material barrel and the eccentric straight sections, to-be-injected materials flow into the adjacent eccentric spiral sections through the eccentric straight sections, and complete positive displacement conveying is conducted on the materials. In the device, the at least two mutually engaged and counter-rotating eccentric rotors are arranged in the material barrel. The at least two eccentric rotors are both provided with the spiral sections and the straight sections at intervals. The center lines of the spiral sections as well as the straight sections and the rotary axis are eccentric. The eccentric directions of the adjacent eccentric rotors are opposite. According to the non-return ring free multiaxial volume pulse injection forming method and device, vibration energy wasted by a non-return ring is avoided, and the influence of the pressure of pulse change on the mold filling and pressure maintaining process is enhanced.

Description

technical field [0001] The invention relates to injection molding, in particular to an injection molding method and device for plastic blending modified materials and long fiber online compounding materials, and belongs to the field of polymer material molding processing equipment. Background technique [0002] Injection molding has the advantages of high production efficiency, strong adaptability, and wide application, and is suitable for the molding and processing of almost all thermoplastics and their composite systems. According to the composition and structural principle of injection molding equipment, the current injection molding equipment is mainly divided into two types: screw plunger type and reciprocating screw type. [0003] The reciprocating screw injection machine adopts a single-screw plasticizing system. Generally speaking, the length-to-diameter ratio of the screw and barrel of the plasticizing system is smaller than that of the extruder, and the screw moves...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/50
CPCB29C45/50B29C45/5008B29C2045/5024
Inventor 瞿金平殷小春
Owner SOUTH CHINA UNIV OF TECH
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