CN2518216Y

CN2518216Y - Push pedal balancing mechanism of multi-injecting head plastic sealed mould

Info

Publication number: CN2518216Y
Application number: CN 01277412
Authority: CN
Inventors: 周逢海; 徐林; 丁宁; 周宗翼
Original assignee: SANJIA MOULDS CO Ltd TONGLING
Current assignee: SANJIA MOULDS CO Ltd TONGLING
Priority date: 2001-12-13
Filing date: 2001-12-13
Publication date: 2002-10-23
Anticipated expiration: 2011-12-13

Abstract

A multi-injection-head plastic packaging mould injection pushing-plate balancing mechanism belongs to the field of the plastic packaging mould and consists of an injection pushing plate and brackets; four corners of the injection pushing plate are separately provided with a rack; the racks on the four corners of the injection pushing plate are engaged with four gears arranged on the brackets at two sides of the injection pushing plate; four guiding holes are arranged on the injection pushing plate; a guiding bushing is arranged inside the guiding hole; a guiding post is arranged inside the guiding bushing; when the guiding post is positioned, the entire pushing plate can move up and down along the guiding post and the racks on the four corners of the pushing plate drive the gears to rotate, thereby controlling the accuracy of the horizontal movement of the pushing plate within plus or minus 0.03 mm. The utility model overcomes the weaknesses that the profiled cavity is filled insufficiently and the injection head is clamped and stagnated.

Description

Many injection heads plastic sealed mould injection push pedal balanced controls

(1) technical field

The utility model belongs to the plastic sealed mould field of integrated circuit and semiconductor device, the push pedal of many injection heads plastic sealed mould injection specifically balanced controls.

(2) background technology

At present, along with the development of information industry, electronic product also develops to miniaturization, networking and high performance direction, and its lead-in wire carrier is more and more thinner, and lead spacing is more and more thinner, and the plastic-sealed body volume is more and more littler, and position, plastic packaging chamber is more and more.Therefore, traditional single injection head plastic package die does not satisfy its encapsulation requirement, many injection heads plastic sealed mould occurred, like this, has shortened the running channel flow process, balanced injection pressure, thus reach packaging effect.But during existing many injection heads design, directly promote injection push pedal campaign by oil cylinder, the balance exercise of injection push pedal is considered not enough, thereby it is discontented the die cavity filling to occur, and injection head and barrel interference happen occasionally, and cause the plastic packaging failure.

(3) summary of the invention

At the problem that exists in existing many injection head designs, in the injection push pedal that a plurality of injection heads are fixed jointly, has only the balance exercise of injection push pedal, just can guarantee the consistent of injection head motion height and movement velocity, thereby guarantee the even filling of plastics, so the balance exercise of injection push pedal is the key that addresses the above problem.

The utility model adopts the rack-and-pinion motion for four jiaos in push pedal in design, and is provided with the guiding mechanism of guide pillar guide pin bushing in push pedal central authorities, thereby has guaranteed the parallel mobile precision of injection push pedal, has improved the plastic packaging quality of electronics unit body.

By the many injections plastic sealed mould injection push pedal balanced controls that the utility model proposes, it is made up of injection push pedal, support, four jiaos in the injection push pedal are provided with four tooth bars, on the support of injection push pedal both sides, with the tooth bar opposite position, four gears have been installed and fixed, gear and tooth bar intermesh, and in the injection push pedal, are provided with guide hole and guide pin bushing, guide pillar is arranged in guide pin bushing, and guide pin bushing can slide along guide pillar.

Embodiment is explained in detail the utility model below in conjunction with accompanying drawing.

As shown in drawings, both sides in injection push pedal (1), support (2) is arranged, four angles in injection push pedal (1), be provided with and fixed four tooth bars (3),, a gear (4) is set respectively at the tooth bar correspondence position of two side stands (2), be fixed on the support (2), gear (4) and tooth bar (3) intermesh.In injection push pedal (1), be provided with guide hole (5), for keeping the balance exercise of push pedal, present embodiment is provided with 4 guide holes, guide pin bushing (6) is arranged in each guide hole, wherein respectively have a guide pillar (7) to install wherein, guide pillar is fixed on the die bottom plate, with the push pedal location, make the motion of push pedal (1) become the slip of guide pin bushing along guide pillar.For the precision that guarantees to slide, being provided with on the center line of all around that the position lays respectively at injection push pedal (1) of 4 guide holes.

(4) description of drawings

Accompanying drawing 1 is the utility model structural representation.

Accompanying drawing 2 is an end view of the present utility model, and among the figure, guide pillar and guide pin bushing have only been represented a pair of, all the other omissions.

(5) embodiment

The utility model in the specific implementation, on the center line of all around of injecting push pedal, four pairs of guide pillar guide pin bushings evenly are set, when the injection push pedal when guide pillar is done upper and lower moving, tooth bar also driven gear rotates, the range of motion is no more than the length of tooth bar, the parallel mobile precision of its push pedal is controlled at ± 0.03mm in.By die trial, the utility model has reached the result of use of expection, has overcome die cavity and has filled discontented and injection head catching phenomenon.

Claims

1, many injection heads plastic sealed mould in a kind of plastic sealed mould field injection push pedal balanced controls, it is made up of injection push pedal, support, it is characterized in that being provided with four tooth bars at four jiaos that inject push pedal, on the support of injection push pedal both sides, with the tooth bar opposite position, installed and fixed four gears, gear and tooth bar intermesh; Be provided with guide hole and guide pin bushing in the injection push pedal, guide pillar is arranged in guide pin bushing, and guide pillar is fixed on the die bottom plate, and guide pin bushing can slide along guide pillar.

2, by the described many injection heads plastic sealed mould of claim 1 injection push pedal balanced controls, it is characterized in that being provided with 4 guide holes in the injection push pedal, its position lays respectively on the center line of all around of push pedal.