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Injection device and method of miniature injection molding machine of differential transmission

A technology of differential transmission and injection device, applied in the field of injection device of micro injection molding machine, can solve the problems of unfavorable development and commercial application of micro injection molding machine, high cost, complex structure, etc. cost effect

Active Publication Date: 2013-08-28
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is not only complicated in structure but also high in cost, which is not conducive to the further development and commercial application of micro-injection molding machines

Method used

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  • Injection device and method of miniature injection molding machine of differential transmission
  • Injection device and method of miniature injection molding machine of differential transmission
  • Injection device and method of miniature injection molding machine of differential transmission

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Embodiment Construction

[0017] The working principle of the differential screw drive of the present invention is as follows: figure 2 As shown, the screw rod 23 is made up of threads with two different pitches on the left and right, wherein the right thread rotates in the fixed nut 21; the left thread rotates in the moving nut 22 that can only move but cannot rotate; The pitches are S 1 and S 2 , their threads are in the same direction, both are right-hand threads. When screw 3 turns (rad) angle, the distance that the screw should move to the frame (that is, the fixed nut 21) , while the nut 22 moves to the right relative to the screw for a distance , then the moving distance L of the movable nut 22 relative to the frame should be the algebraic sum of the two moving amounts, namely , because S 1 and S 2 The difference is small, even if If the angle is large, the moving distance L will be small, and the differential thread realizes the precise transmission of the micro-motion device.

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Abstract

The invention discloses an injection device and an injection method of a miniature injection molding machine of differential transmission. The injection device mainly comprises an injection servo motor, a thread bushing, a drive nut, a driven lead screw, an injection plunger, a measuring and regulating device, a pre-molding device and the like, wherein the drive nut is fixedly connected with a rack together, the injection servo motor and the thread bushing are connected to directly drive the thread bushing to rotate, an outer thread of the thread bushing is matched with the drive nut to form a drive thread pair, an inner thread of the thread bushing is matched with the driven lead screw to form a driven thread pair, the drive thread pair and the driven thread pair are serially overlapped to form a differential screw mechanism, and the screw difference of the two thread pairs is the differential distance generated by rotating the thread bushing for one circle. The invention provides the injection device and the injection method of the miniature injection molding machine of differential transmission, solving the problem that the miniature injection amount and the injection precision are difficult to control in a miniature injection molding process. The injection device is simple in structure, easy to manufacture and convenient and efficient to control, and is suitable for injection forming of a precise miniature plastic product.

Description

technical field [0001] The invention relates to the technical field of injection molding equipment, in particular to an injection device and method for a micro injection molding machine capable of realizing precision injection molding of micro products. Background technique [0002] With the rapid development of micro-electromechanical systems (MEMS), the demand for micro-products is increasing. Micro-injection molding technology is characterized by its simple molding process, stable quality of plastic parts, high production efficiency, low manufacturing cost, and easy realization of batches. With the advantages of automation and automation, it has developed rapidly in the field of plastic micro-product molding, and its status in micro-electro-mechanical systems has been increasing. It has become one of the research hotspots in precision micro-part molding technology. [0003] Injection molding of micro-products is mainly to solve the problems of large plasticization volume,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/54B29C45/76B29C45/17
Inventor 许忠斌黄庆达杨世鹏苏良瑶王珏施优优周巨栋张本西刘国林
Owner ZHEJIANG UNIV
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