WO2022033061A1

WO2022033061A1 - Toggle linkage clamping mechanism

Info

Publication number: WO2022033061A1
Application number: PCT/CN2021/087002
Authority: WO
Inventors: 傅南红; 李显达; 陈邦锋; 贺天鹏
Original assignee: 宁波长飞亚塑料机械制造有限公司
Priority date: 2020-08-13
Filing date: 2021-04-13
Publication date: 2022-02-17
Also published as: CN112092316A

Abstract

Disclosed is a toggle linkage clamping mechanism, comprising a tail plate, a movable template and a toggle linkage mechanism. The toggle linkage mechanism comprises a thrust seat and a pair of linkage assemblies which are symmetrically distributed up and down. The linkage assemblies are each composed of two front connecting rods independent from one another, three rear connecting rods independent from one another, and two small connecting rods independent from one another. Front ends of the two front connecting rods are hinged to a rear end surface of the movable template, rear ends of the two front connecting rods are hinged to front ends of the three rear connecting rods, and rear ends of the three rear connecting rods are hinged to a front end surface of the tail plate. The middle portions of the rear connecting rods distributed in the middle are hinged to one end of the two small connecting rods, and the other end of the two small connecting rods are hinged to the thrust seat. In addition, a center connecting line of the front ends and rear ends of the rear connecting rods is a boundary, and the hinge position of the middle portions of the rear connecting rods distributed in the middle and one end of the two small connecting rods is located on an opposite side of the hinge position of the other end of the two small connecting rods and the thrust seat.

Description

A toggle link mold clamping mechanism

technical field

The invention relates to a mold clamping mechanism in an injection molding machine, in particular to a toggle link mold clamping mechanism.

Background technique

In recent years, the competition in the injection molding machine industry has become increasingly fierce, which requires injection molding machine manufacturers to continuously improve the working efficiency of their products through technological innovation. The existing toggle link mold clamping mechanism of the injection molding machine has close to the limit of its force amplification efficiency and speed improvement ability, and cannot be further improved, so it is difficult to meet the market demand.

For example: the invention patent "toggle link mold clamping mechanism" announced in China (patent number: ZL 200910101481.4), which includes a tail plate, a movable template and a pair of toggle link structures, each toggle link structure also includes a front The connecting rod, the rear connecting rod, the small connecting rod and the push seat, wherein the front end of the front connecting rod is hinged with the rear end surface of the moving template, the rear end of the front connecting rod is hinged with the front end of the rear connecting rod, and the rear end of the rear connecting rod is hinged with the rear end surface of the moving template. The front end of the tail plate is hinged, one end of the small connecting rod is hinged with the middle of the rear connecting rod, and the other end is hinged with one side of the push seat, and the push seat is limited between the tail plate and the movable template and can move back and forth. It is characterized by: The front link is an integral piece, the front end of the front link has two front lugs hinged with the rear end surface of the movable template, and the rear end of the front link has three rear lugs hinged with the rear link. The toggle link mold clamping mechanism has the advantages of simple structure of the movable platen and tail plate and long service life. The hinge position on one side of the seat is located on the same side where the center line connecting the front and rear ends of the rear connecting rod is the dividing line (see Figure 1 in the 200910101481.4 document), thus resulting in a long movement stroke of the toggle link mold clamping mechanism, and the force Zoom ratio is small.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a toggle link mold clamping mechanism, which has a short movement stroke and a large force amplification ratio.

The technical solution adopted by the present invention to solve the above technical problems is: a toggle link mold clamping mechanism, comprising a tail plate, a movable template, and a drive mechanism disposed between the tail plate and the movable template for driving The toggle link mechanism in which the movable template moves relative to the tail plate, the toggle link mechanism includes a thrust seat and a pair of connecting rod assemblies that are symmetrically distributed up and down, and is characterized in that: each of the connecting rods The rod assembly consists of two front links independent of each other and arranged in parallel at the same height position, three rear links independent of each other and arranged in parallel at the same height position, and two independent and parallel small links at the same height position. It is composed of connecting rods, the front ends of the two front connecting rods are hinged with the rear end surface of the moving template, the rear ends of the two front connecting rods are hinged with the front ends of the three rear connecting rods, and the three The rear end of the rear connecting rod is hinged with the front end surface of the tail plate, the middle part of the rear connecting rod distributed in the middle is hinged with one end of the two small connecting rods, and the two small connecting rods are hinged. The other end of the connecting rod is hinged with the thrust seat, and the center connecting line between the front end and the rear end of the rear connecting rod is the dividing line, and the middle part of the rear connecting rod distributed in the middle is connected with the two said rear connecting rods. The hinged position of one end of the small connecting rods is located on the opposite side of the hinged position of the other ends of the two small connecting rods and the thrust seat.

The rear end surface of the movable template has three rear brackets, and the rear ends of the three rear brackets are jointly fixed with a front large pin, and the front large pin cannot be opposite to the three rear brackets. Rotating, the respective front ends of the two front connecting rods are movably sleeved on the front large pin shafts and can rotate relative to the front large pin shafts, and the front ends of each of the front connecting rods are located adjacent to each other. The rear ends of the two said rear brackets are in close contact with the sides, and the front ends of the three said rear connecting rods are jointly fixed with a large middle pin shaft, and the said large middle pin shaft cannot be opposite to the three said rear links. The rear connecting rod rotates, and the respective rear ends of the two front connecting rods are movably sleeved on the large middle pin shaft and can rotate relative to the large middle pin shaft. The rear end is located between the front ends of the two adjacent rear links and the sides are close to each other. The front end surface of the tail plate has two front brackets, and the rear ends of the three rear links are respectively The rear large pins are fixed together, and the rear large pins cannot rotate relative to the three rear connecting rods. The front ends of the two front brackets are movably sleeved on the rear large pins and can be opposed to each other. The said rear large pin rotates, the front end of each said front bracket is located between the rear ends of the two adjacent said rear connecting rods and the sides are close to each other, and the respective two said small connecting rods are in close contact with each other. A first small pin shaft is fixed on one end together, the first small pin shaft cannot rotate relative to the two small connecting rods, and the middle part of the rear connecting rod distributed in the middle is movably sleeved on the two small connecting rods. On the first small pin shaft and rotatable relative to the first small pin shaft, one end of each of the two small connecting rods is symmetrically located on both sides of the middle part of the middle part of the rear connecting rod distributed in the middle, and the side faces are tight. Sticker, the other ends of the two small connecting rods are jointly fixed with a second small pin shaft, the second small pin shaft cannot rotate relative to the two small connecting rods, and the thrust seat moves It is sleeved on the second small pin shaft and can be rotated relative to the second small pin shaft. paste.

The rear connecting rod distributed in the middle is a three-hole rear connecting rod, and the two rear connecting rods symmetrically distributed on both sides of the three-hole rear connecting rod are two-hole rear connecting rods. The front and rear ends of the two-hole rear connecting rod and the three-hole rear connecting rod each have an end hole, the middle part of the three-hole rear connecting rod has a middle hole, and the middle hole is located in two holes. On one side of the center line of the end hole, the end hole located at the front end is adapted to the middle large pin shaft, and the end hole located at the rear end is adapted to the rear large pin shaft , the middle hole is adapted to the first small pin shaft. The middle hole is the hinge position between the middle part of the three-hole rear connecting rod and one end of the small connecting rod, which is located on one side of the center line connecting the two end holes, and the hinge position between the other end of the small connecting rod and the thrust seat is on the two sides. The other side of the line connecting the center of the end hole.

The three-hole rear connecting rod is in the shape of a dumbbell as a whole, and the thickness of the middle part of the three-hole rear connecting rod is smaller than the thickness of the end part of the three-hole rear connecting rod. The three-hole rear connecting rod is designed into a dumbbell-shaped structure, which can effectively avoid the small connecting rod interfering with the front connecting rod when the movable template moves relative to the tail plate.

Compared with the prior art, the advantages of the present invention are:

In the toggle link mold clamping mechanism of the present invention, the hinged position of the middle part of the rear connecting rod and one end of the two small connecting rods is located at the center connecting line between the front end and the rear end of the rear connecting rod as the dividing line, and the two small connecting rods are located in the middle. The other end of the connecting rod is opposite to the hinge position of the thrust seat, that is, the two hinge positions of the small connecting rod are not on the same side of the rear connecting rod, which shortens the movement stroke of the toggle link mold clamping mechanism and improves the force amplification. efficiency, thereby improving production efficiency and reducing production costs.

Description of drawings

Fig. 1 is the top view of the toggle link mold clamping mechanism of the present invention;

2 is a cross-sectional view of the movable template before and after moving relative to the tail plate in the toggle link mold clamping mechanism of the present invention;

3 is a schematic structural diagram of the three-hole rear connecting rod in the connecting rod assembly of the toggle connecting rod mechanism in the toggle connecting rod mold clamping mechanism of the present invention.

detailed description

The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.

A toggle link mold clamping mechanism proposed by the present invention, as shown in the figure, includes a tail plate 1, a movable template 2, and a tail plate disposed between the tail plate 1 and the movable template 2 for driving the movable template 2 to be opposite to the tail plate 1. A moving toggle link mechanism 3, the toggle link mechanism 3 includes a thrust seat 34 (ie a crosshead) and a pair of connecting rod assemblies that are symmetrically distributed up and down, each connecting rod assembly is composed of two independent and at the same height. The front links 31 arranged in parallel in position, three rear links 32 independent of each other and arranged in parallel at the same height position, and two small links 33 independent of each other and arranged in parallel at the same height are composed of two front links. The front end of the rod 31 is hinged with the rear end surface of the movable template 2, the rear ends of the two front links 31 are hinged with the front ends of the three rear links 32, and the rear ends of the three rear links 32 are hinged with the front end of the tail plate 1. The middle of the middle rear connecting rod 32 is hinged with one end of the two small connecting rods 33, the other ends of the two small connecting rods 33 are hinged with the thrust seat 34, and the center connecting line between the front end and the rear end of the rear connecting rod 32 is divided into two parts. The boundary line, the hinge position between the middle part of the rear link 32 distributed in the middle and one end of the two small links 33 is located on the opposite side of the hinge position between the other end of the two small links 33 and the thrust seat 34 .

In this embodiment, there are three rear brackets 21 on the rear end surface of the movable template 2 , and the front large pins 41 are fixed on the rear ends of the three rear brackets 21 . The front large pins 41 cannot be opposite to the three rear brackets 21 . Rotating, the respective front ends of the two front connecting rods 31 are movably sleeved on the front large pin shaft 41 and can be rotated relative to the front large pin shaft 41, and the front end of each front connecting rod 31 is located at the rear of the adjacent two rear brackets 21. The front ends of the three rear connecting rods 32 are in close contact with each other and the front ends of the three rear connecting rods 32 are jointly fixed with a large middle pin shaft 42, which cannot rotate relative to the three rear connecting rods 32. The rear ends of the two front connecting rods 31 The movable sleeve is sleeved on the middle large pin shaft 42 and can be rotated relative to the middle large pin shaft 42. The rear end of each front connecting rod 31 is located between the front ends of the two adjacent rear connecting rods 32 and the sides are close to each other. There are two front brackets 11 on the front end surface of the 1, and rear large pins 43 are fixed on the rear ends of the three rear links 32. The rear large pins 43 cannot rotate relative to the three rear links 32. The two front brackets 11 The front end of each front bracket 11 is movably sleeved on the rear large pin shaft 43 and can be rotated relative to the rear large pin shaft 43. The front end of each front bracket 11 is located between the rear ends of the two adjacent rear connecting rods 32 and the sides are close to each other. A first small pin shaft 44 is fixed on each end of each of the small connecting rods 33. The first small pin shaft 44 cannot rotate relative to the two small connecting rods 33. On the small pin shaft 44 and rotatable relative to the first small pin shaft 44, one end of each of the two small connecting rods 33 is symmetrically located on both sides of the middle of the middle part of the rear connecting rod 32 distributed in the middle and the sides are close to each other, and the two small connecting rods The other ends of the rods 33 are jointly fixed with a second small pin shaft 45. The second small pin shaft 45 cannot rotate relative to the two small connecting rods 33. The thrust seat 34 is movably sleeved on the second small pin shaft 45 and can be opposed to each other. The second small pin shaft 45 rotates, and the other ends of the two small connecting rods 33 are symmetrically located on both sides of the thrust seat 34 and the side surfaces are close to each other.

In this embodiment, the rear link 32 distributed in the middle is a three-hole rear link 35 , and the two rear links 32 symmetrically distributed on both sides of the three-hole rear link 35 are two-hole rear links 36 , the front and rear ends of the two-hole rear connecting rod 36 and the three-hole rear connecting rod 35 each have an end hole 321, the middle of the three-hole rear connecting rod 35 has a middle hole 322, and the middle hole 322 is located between the two end holes 321. On one side of the center line, the end hole 321 at the front end fits with the large middle pin 42 , the end hole 321 at the rear end fits with the rear large pin 43 , and the middle hole 322 matches the first small pin 44 . The middle hole 322 is the hinge position between the middle of the three-hole rear connecting rod 35 and one end of the small connecting rod 33 , which is located on one side of the center line connecting the two end holes 321 , and the other end of the small connecting rod 33 is connected to the thrust seat 34 . The hinged position is located on the other side of the line connecting the centers of the two end holes 321 .

In this embodiment, as shown in FIG. 3 , the three-hole rear connecting rod 35 is in the shape of a dumbbell as a whole, and the thickness of the middle of the three-hole rear connecting rod 35 is smaller than the thickness of the end of the three-hole rear connecting rod 35 . The connecting rod 35 is designed in a dumbbell-shaped structure, which can effectively prevent the small connecting rod 33 from interfering with the front connecting rod 31 when the movable template 2 moves relative to the tail board 1 .

Claims

A toggle link mold clamping mechanism, comprising a tail plate, a movable template, and a curved plate arranged between the tail plate and the movable template for driving the movable template to move relative to the tail plate. Toggle link mechanism, the toggle link mechanism includes a thrust seat and a pair of connecting rod assemblies that are symmetrically distributed up and down, characterized in that each of the connecting rod assemblies is composed of two independent rods at the same height. The front links are arranged in parallel, three rear links are independent of each other and are arranged in parallel at the same height, and two small links are independent of each other and are arranged in parallel at the same height. The front end is hinged with the rear end surface of the movable template, the rear ends of the two front links are hinged with the front ends of the three rear links, and the rear ends of the three rear links are hinged with the tail The front end surface of the plate is hinged, the middle part of the rear connecting rod distributed in the middle is hinged with one end of the two small connecting rods, and the other ends of the two small connecting rods are hinged with the thrust seat, And taking the center line between the front and rear ends of the rear connecting rod as the dividing line, the hinge position between the middle part of the rear connecting rod and the one end of the two small connecting rods distributed in the middle is located in the two connecting rods. The other end of the small connecting rod is on the opposite side of the hinged position of the thrust seat.
The toggle link mold clamping mechanism according to claim 1, wherein: the rear end surface of the movable template is provided with three rear brackets, and the rear ends of the three rear brackets are jointly fixed with The front large pin, the front large pin cannot rotate relative to the three rear brackets, and the respective front ends of the two front connecting rods are movably sleeved on the front large pin and can be relative to all the The said front big pin rotates, the front end of each said front connecting rod is located between the rear ends of two adjacent said rear brackets and the sides are close to each other, and the front ends of the three said rear connecting rods are on the respective front ends. A middle large pin shaft is fixed together, the middle large pin shaft cannot rotate relative to the three described rear connecting rods, and the respective rear ends of the two described front connecting rods are movably sleeved on the described middle large pin shafts and can be rotated relative to the middle large pin shaft, the rear end of each front connecting rod is located between the front ends of the two adjacent rear connecting rods and the sides are close to each other. There are two front brackets on the front end surface, and rear large pin shafts are fixed on the rear ends of the three rear connecting rods, and the rear large pin shafts cannot rotate relative to the three rear connecting rods. The front end of the front bracket is movably sleeved on the rear large pin shaft and can be rotated relative to the rear large pin shaft, and the front end of each of the front brackets is located on the adjacent two rear connecting rods. The rear ends of the rods are in close contact with the sides, and a first small pin is fixed on one end of each of the two small connecting rods. The first small pin cannot be opposite to the two small connecting rods. Rotation, the middle part of the rear connecting rod distributed in the middle is movably sleeved on the first small pin shaft and can be rotated relative to the first small pin shaft, and the two small connecting rods are respectively One end is symmetrically located on both sides of the middle part of the rear connecting rod distributed in the middle and the sides are close to each other, and the other ends of the two small connecting rods are jointly fixed with a second small pin shaft. The small pin shaft cannot rotate relative to the two small connecting rods, the thrust seat is movably sleeved on the second small pin shaft and can rotate relative to the second small pin shaft. The other ends of the small connecting rods are symmetrically located on both sides of the thrust seat and the side faces are close to each other.
The toggle link mold clamping mechanism according to claim 2, wherein the rear links distributed in the middle are three-hole rear links, and the three-hole rear links are symmetrically distributed. The two rear connecting rods on both sides of the two-hole rear connecting rod are two-hole rear connecting rods, and the front and rear ends of the two-hole rear connecting rod and the three-hole rear connecting rod each have an end hole. The middle of the three-hole rear connecting rod has a middle hole, the middle hole is located on one side of the center line of the two end holes, the end hole at the front end and the middle large pin shaft Adaptation, the end hole at the rear end is adapted to the rear large pin shaft, and the middle hole is adapted to the first small pin shaft.
The toggle link mold clamping mechanism according to claim 3, wherein the three-hole rear link is in the shape of a dumbbell as a whole, and the thickness of the middle of the three-hole rear link is smaller than the thickness of the three-hole rear link. The thickness of the end of the three-hole rear link.