CN2454116Y

CN2454116Y - Small-angle rear-bar mould-matching mechanism of plastic-injection machine

Info

Publication number: CN2454116Y
Application number: CN 00265483
Authority: CN
Inventors: 张炜; 陈阿明; 沈海芳
Original assignee: YONGTAI PLASTIC MACHINERY CO Ltd NINGBO
Current assignee: YONGTAI PLASTIC MACHINERY CO Ltd NINGBO
Priority date: 2000-12-26
Filing date: 2000-12-26
Publication date: 2001-10-17
Anticipated expiration: 2010-12-26

Abstract

The utility model relates to a small-angle rear-bar mould-matching mechanism of a plastic-injection machine, which is composed of an upper and a lower pull bars for connecting a rear mould plate, a moving mould plate with a front mould plate into a whole; a crosshead can be fixed on the front end of a piston bar of a mould-matching oil cylinder, and can be connected with the rear bar using a pin shaft through a small connecting bar; the front bar can be connected with the rear bar through a pin shaft, the front bar and the rear bar can be respectively rotated around a rear and a front supports fixed to the moving mould plate and the rear mould plate to form a connecting bar mechanism with five fulcrums and double cranks; three pin shaft holes are arranged in triangular, one angle is arranged in an obtuse angle, and other two angles are minor angles. The small-angle rear-bar mould-matching mechanism of plastic-injection machine has the advantages of large rigidity, large locking force, large stroke ratio, small mechanical shock of a matching mould, and quick and steady movement; quality of products and production efficiency can be enhanced, and the small-angle rear-bar mould-matching mechanism of the plastic-injection machine has visible energy saving effect.

Description

Bar clamping behind the low-angle of injection machine

The utility model relates to a kind of main parts size of injection machine, particularly a kind ofly can guarantee that mould for plastics locks effectively or open, and has bar clamping behind the low-angle that impacts little and the injection machine that stroke ratio is big when action.

Common injection machine stroke ratio is little, poor rigidity, and ZL99206568.2 " the amplifying mold closing mechanism of injection machine " is though solved this two problems, and for improving rigidity and strengthening stroke ratio, the stressed fulcrum centre-to-centre spacing of this device rear pattern plate becomes big, has increased material consumption; There is simultaneously crank connecting rod mechanism that the Triaxial hole that is equilateral triangle constitutes to begin or die sinking when stopping on the bar of back, has bigger acceleration to impact at matched moulds; In addition, when locked mode, the multiplication factor of power is less, is unfavorable for locking mould.

The purpose of this utility model is to provide bar clamping behind a kind of low-angle of injection machine, can improve integral rigidity, and the multiplication factor of power when strengthening stroke ratio and locked mode can reduce opening and closing stamping and hit again, improves the quality and the production efficiency of die products.

Utility model be achieved in that behind the low-angle of injection machine the bar clamping by upper and lower pull bar with rear pattern plate, moving platen, front template fuses, crosshead is fixed on the piston rod front end of die cylinder, and is connected with bearing pin with the back bar by small rod; Before bar be connected by bearing pin with the back bar, and rotate around back, the preceding bearing that is fixed on rear pattern plate and the moving platen respectively, form five fulcrum hyperbolic elbow linkages, three pin shaft holes on the bar of described back be one jiao be the obtuse angle, other two jiaos be low-angle rounded projections arranged.

Fig. 1 is structural representation of the present utility model (the first half is the matched moulds locking state, and the latter half is the die sinking final state).

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the A-A cutaway view of Fig. 1.

Fig. 4 is a back bar low-angle schematic diagram.

Below in conjunction with accompanying drawing embodiment of the present utility model is further described:

Before bar (8) for two ends the connecting rod of through hole is arranged, crosshead (7) upper and lower side has symmetrical through hole.

The three through hole connecting rods that are triangularly arranged are arranged on the back bar (5), and wherein one jiao is the Tun angle, and other two jiaos is 5～15 ° low-angle.

There is through hole at small rod (6) two ends, and an end connects crosshead (7) by bearing pin, and end connects back bar (5) by bearing pin in addition.

Preceding bar (8) is connected by bearing pin with back bar (5).

Preceding bearing (9) is connected with moving platen (10) with screw, is connected with preceding bar (8) by bearing pin simultaneously.

Rear support (4) is connected with rear pattern plate (3) with screw, is connected with back bar (5) by bearing pin simultaneously.

Above-mentioned each part connects into five fulcrum hyperbolic elbow linkages by the bearing pin of band oil groove.

Die cylinder (1) is installed in above the rear pattern plate (3) by screw, and its piston rod front end is connected with crosshead (7).

Rear pattern plate (3), moving platen (10), front template (11) are connected into one by upper and lower pull bar (2), and moving platen (10) can be gone up at pull bar (2) and move.

During die sinking, die cylinder (1) drives crosshead (7) and drives the gathering of five fulcrum hyperbolic elbow linkages, makes moving platen (10) be moved to the left die sinking, shown in Fig. 1 the latter half.

Otherwise linkage stretches during matched moulds, makes moving platen (10) move right locked mode, shown in Fig. 1 the first half.

The utility model is compared with prior art: rear pattern plate is pelvic cavity shape structure, when die sinking stops, and crosshead Can enter in the pelvic cavity, particularly three through holes on the back link are the arrangement of low-angle triangle, can make matched moulds Mechanism under the compact conformation prerequisite, the multiplication factor of increased force will, realize shifting formwork stroke and die cylinder stroke it Bigger, reach about 1.25 times (common only 0.8-1.1) and dwindled mechanism size, improved oil cylinder Operating mode; The stressed fulcrum centre-to-centre spacing of rear pattern plate is littler simultaneously, and the whole rigidity of mechanism is bigger, is conducive to guarantee locked mode Power, the plastic products precision that improves; Moreover, have excellent easy motion curve feature, matched moulds begin (or Die sinking stops) time mechanism impact littlely, be conducive to guarantee product quality and enhance productivity.

Claims

1. bar clamping behind the low-angle of an injection machine, by upper and lower pull bar (2) rear pattern plate (3), moving platen (10), front template (11) are connected as one, crosshead (7) is fixed on the piston rod front end of die cylinder (1), and is connected with bearing pin with back bar (5) by small rod (6); Preceding bar (8), back bar (5) connect by bearing pin, and respectively around be fixed on rear pattern plate (3), the moving platen (10) after, rotate preceding bearing (4), (9), form five fulcrum hyperbolic elbow linkages, it is characterized in that it is the obtuse angle that three pin shaft holes on the described back bar (5) are one jiao, two jiaos is low-angle rounded projections arranged in addition.

2. clamping according to claim 1 is characterized in that on the back bar (5) three pin shaft holes being arranged, and one of them angle is the obtuse angle, and two angles are 5～15 ° of low-angle rounded projections arranged in addition.