CN211467368U

CN211467368U - Injection molding machine clamping cylinder structure

Info

Publication number: CN211467368U
Application number: CN201921563418.8U
Authority: CN
Inventors: 骆小锋
Original assignee: Suzhou Lizhu Machinery Co ltd
Current assignee: Suzhou Lizhu Machinery Co ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-09-11
Anticipated expiration: 2029-09-19

Abstract

The utility model relates to a mold locking cylinder structure of an injection molding machine, which comprises a mounting seat arranged above the injection molding machine, a small-bore mold closing oil cylinder and a large-bore pressurizing oil cylinder which are vertically arranged on the mounting seat; the large-cylinder-diameter pressurizing oil cylinder comprises a cavity arranged at the bottom of the mounting seat, a piston movably arranged in the cavity and capable of moving up and down, an end cover arranged at the bottom of the mounting seat and used for sealing the cavity, and a brake lever, wherein the upper end of the brake lever is connected with the piston, and the lower end of the brake lever vertically penetrates through the end cover; an upper oil port and a lower oil port are respectively arranged on the top of the mounting seat and the end cover; the utility model discloses a little cylinder diameter compound die hydro-cylinder drive cope match-plate pattern goes up and down, can improve compound die efficiency greatly, and big cylinder diameter pressure boost hydro-cylinder only need finely tune the upper and lower position of contracting brake pole, realizes the mode locking with the cooperation of contracting brake mechanism, and consequently the working stroke is short, and occupation space can effectively reduce the capacity of required hydraulic oil, has reduced use cost.

Description

Injection molding machine clamping cylinder structure

Technical Field

The utility model relates to a field of moulding plastics refers in particular to an injection molding machine die locking jar structure.

Background

An injection molding machine is a commonly used plastic machine for producing plastic products; during production, a forming die is arranged on an injection molding machine, a plastic product is formed in the forming die, and a large forming pressure is needed during product forming, so a mold locking device is basically arranged on the injection molding machine and used for bearing the forming pressure of the forming die; for example, 201320863366.2 in the prior art discloses a liquid-filled mold clamping mechanism of a plastic injection-blow molding machine, but the stroke of the existing mold clamping cylinder is large, which not only occupies a large space, but also requires a large oil flow, so that the machine has to be equipped with a large-displacement hydraulic source (such as a hydraulic pump), which results in large energy consumption and high production cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an injection molding machine die locking cylinder structure in order to overcome prior art not enough.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a mold locking cylinder structure of an injection molding machine comprises a mounting seat arranged above the injection molding machine, a small-cylinder-diameter mold closing oil cylinder vertically arranged on the mounting seat and used for driving an upper mold plate to lift, and a large-cylinder-diameter pressurizing oil cylinder arranged at the bottom of the mounting seat; the large-cylinder-diameter pressurizing oil cylinder comprises a cavity arranged at the bottom of the mounting seat, a piston movably arranged in the cavity and capable of moving up and down, an end cover arranged at the bottom of the mounting seat and used for sealing the cavity, and a brake lever, wherein the upper end of the brake lever is connected with the piston, and the lower end of the brake lever vertically penetrates through the end cover; an upper oil port and a lower oil port are correspondingly arranged on the top of the mounting seat and the end cover respectively; and sealing structures are arranged between the piston and the cavity, between the band-type brake rod and the end cover and at the joints of the end cover and the cavity.

Preferably, the sealing structure between the piston and the cavity comprises a first O-shaped sealing ring and a first wear-resisting ring which are respectively arranged on the surface of the piston.

Preferably, the number of the first O-ring seals is two, and the two first O-ring seals are respectively located on two sides of the first wear-resistant ring.

Preferably, the upper end of the end cover is provided with a boss extending into the cavity; the sealing structure is arranged between the boss and the cavity.

Preferably, the sealing structure between the boss and the cavity comprises a second O-ring seal arranged on the surface of the boss.

Preferably, the number of the second O-shaped sealing rings is two, and the second O-shaped sealing rings are arranged at intervals up and down.

Preferably, the sealing structure between the contracting brake rod and the end cover comprises a dustproof ring, a shaft oil seal and a second wear-resistant ring which are arranged on the inner surface of the end cover and are sequentially arranged from outside to inside at intervals.

Preferably, the inner surface of the end cover is further provided with a third O-shaped sealing ring between the shaft oil seal and the second wear-resistant ring.

Preferably, the lower oil port is arranged on the outer surface of the end cover and is L-shaped.

Preferably, the end cover is fixed at the bottom of the mounting seat through a plurality of bolts uniformly distributed on the circumference.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:

1. the utility model discloses a little cylinder diameter compound die hydro-cylinder drive cope match-plate pattern goes up and down, can improve the compound die efficiency greatly, and big cylinder diameter pressure boost hydro-cylinder only need finely tune the upper and lower position of contracting brake pole, realizes the mode locking with contracting brake mechanism cooperation, therefore the working stroke is short, does not occupy space, can effectively reduce the capacity of required hydraulic oil, has reduced use cost, can reduce the volume of oil tank again simultaneously, makes the cost that the customer changed hydraulic oil also reduce to some extent;

2. the middle-large diameter pressure-increasing oil cylinder of the utility model can readjust the position only when a new mould is replaced, thereby greatly reducing the number of times of movement and greatly prolonging the service life;

3. the utility model discloses regard the mount pad as the cylinder body, not only be convenient for install and make, and practiced thrift the space.

Drawings

The technical scheme of the utility model is further explained by combining the attached drawings as follows:

FIG. 1 is an installation diagram of a mold-locking cylinder structure of an injection molding machine according to the present invention;

fig. 2 is a partially enlarged view of a portion a of fig. 1.

Wherein: 1. a mounting seat; 2. a small-cylinder-diameter die-closing oil cylinder; 3. a large-bore pressurized oil cylinder; 31. a piston; 311. a first O-ring seal; 312. a first wear ring; 32. a cavity; 33. a lower oil port; 34. an end cap; 341. a second O-ring seal; 342. a second wear ring; 342. a third O-ring seal; 344. oil seal for the shaft; 345. a dust ring; 346. a boss; 35. a brake lever; 36. an oil feeding port; 4. a band-type brake mechanism; 5. and (5) loading the template.

Detailed Description

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

Fig. 1-2 show a mold clamping cylinder structure of an injection molding machine according to the present invention, which comprises a mounting base 1 disposed above the injection molding machine, a small-bore mold clamping cylinder 2 vertically disposed on the mounting base 1 for driving an upper mold plate 5 to ascend and descend, and a large-bore pressurizing cylinder 3 disposed at the bottom of the mounting base 1; the large-cylinder-diameter pressurizing oil cylinder 3 comprises a cavity 32 arranged at the bottom of the mounting seat 1, a piston 31 movably arranged in the cavity 32 and capable of moving up and down, an end cover 34 arranged at the bottom of the mounting seat 1 and used for sealing the cavity 32, and a brake lever 35 of which the upper end is connected with the piston 31 and the lower end vertically penetrates through the end cover 34; an upper oil port 36 and a lower oil port 33 are correspondingly arranged on the top of the mounting seat 1 and the end cover 34 respectively; sealing structures are arranged between the piston 31 and the cavity 32, between the brake lever 35 and the end cover 34 and at the connection part of the end cover 34 and the cavity 32; when in work: the mold locking cylinder structure of the injection molding machine is firstly respectively installed on the left side and the right side of the injection molding machine, namely the output end of a small-cylinder-diameter mold closing cylinder 2 is connected with an upper template 5, the lower end of a brake contracting rod 35 sequentially passes through a brake contracting mechanism 4 and the upper template 5 from top to bottom, then the upper template 5 is driven to move downwards through the small-cylinder-diameter mold closing cylinder 2 until the mold is closed, then the height of the mold is automatically recorded by an injection molding machine controller, because the height of each pair of molds is different, the threads on the brake contracting mechanism 4 can not be accurately clamped into the threads on the brake contracting rod 35, so the upper position and the lower position of the brake contracting rod 35 need to be finely adjusted through a large-cylinder-diameter pressurizing cylinder 3, the brake contracting rod 35 is clamped through the brake contracting mechanism 4, mold locking is realized, here, the position of the large-cylinder-diameter pressurizing cylinder 3 can be readjusted only when a new mold is replaced, the activity, therefore, the service life is greatly prolonged, and the large-cylinder-diameter boosting oil cylinder 3 only needs to finely adjust the upper position and the lower position of the brake rod 35, so that the working stroke is short, the space is not occupied, the capacity of required hydraulic oil can be effectively reduced, and the use cost is reduced.

Further, the sealing structure between the piston 31 and the cavity 32 includes a first O-ring 311 and a first wear-resistant ring 312 respectively disposed on the surface of the piston 31.

Further, the number of the first O-shaped sealing rings 311 is two, and the two first O-shaped sealing rings are respectively located on two sides of the first wear-resistant ring 312, so that bidirectional sealing is realized.

Further, the upper end of the end cap 34 is provided with a boss 346 extending into the cavity 32; the sealing structure is arranged between the boss 346 and the cavity 32, so that the positioning effect, the installation and the sealing are facilitated.

Further, the sealing structure between the boss 346 and the cavity 32 includes a second O-ring 341 disposed on the surface of the boss 346.

Further, the second O-ring 341 is provided with two, and is placed from top to bottom at interval, and sealed effect is better, prevents the oil leak.

Further, the sealing structure between the brake lever 35 and the end cover 34 includes a dust-proof ring 345, an oil seal 344 for a shaft, and a second wear-resistant ring 342, which are disposed on the inner surface of the end cover 34 and are spaced in sequence from outside to inside.

Further, a third O-ring 343 is further disposed on the inner surface of the end cover 34 between the shaft oil seal 344 and the second wear-resistant ring 342, so that the sealing effect is better and oil leakage is prevented.

Further, lower hydraulic fluid port 33 sets up the surface at end cover 34, and is L shape, can effectively avoid cope match-plate pattern 5 to reciprocate the in-process, band-type brake mechanism 4 collides with the oil pipe of lower hydraulic fluid port 33, causes the damage.

Further, the end cover 34 is fixed at the bottom of the mounting seat 1 through a plurality of bolts uniformly distributed on the circumference, so that the mounting and dismounting are convenient.

The above is only a specific application example of the present invention, and does not constitute any limitation to the protection scope of the present invention. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.

Claims

1. The utility model provides an injection molding machine mode locking cylinder structure which characterized in that: the device comprises a mounting seat arranged above an injection molding machine, a small-cylinder-diameter die-closing oil cylinder vertically arranged on the mounting seat and used for driving an upper template to lift, and a large-cylinder-diameter pressurizing oil cylinder arranged at the bottom of the mounting seat; the large-cylinder-diameter pressurizing oil cylinder comprises a cavity arranged at the bottom of the mounting seat, a piston movably arranged in the cavity and capable of moving up and down, an end cover arranged at the bottom of the mounting seat and used for sealing the cavity, and a brake lever, wherein the upper end of the brake lever is connected with the piston, and the lower end of the brake lever vertically penetrates through the end cover; an upper oil port and a lower oil port are correspondingly arranged on the top of the mounting seat and the end cover respectively; and sealing structures are arranged between the piston and the cavity, between the band-type brake rod and the end cover and at the joints of the end cover and the cavity.

2. The mold-locking cylinder structure of injection molding machine according to claim 1, wherein: the sealing structure between the piston and the cavity comprises a first O-shaped sealing ring and a first wear-resisting ring which are respectively arranged on the surface of the piston.

3. The mold-locking cylinder structure of injection molding machine according to claim 2, wherein: the first O-shaped sealing rings are arranged in two numbers and are respectively positioned on two sides of the first wear-resisting ring.

4. The mold-locking cylinder structure of injection molding machine according to claim 1, wherein: the upper end of the end cover is provided with a boss extending into the cavity; the sealing structure is arranged between the boss and the cavity.

5. The mold-locking cylinder structure of injection molding machine according to claim 4, wherein: the sealing structure between the boss and the cavity comprises a second O-shaped sealing ring arranged on the surface of the boss.

6. The mold-locking cylinder structure of injection molding machine according to claim 5, wherein: the second O-shaped sealing rings are arranged in two numbers and are arranged at intervals from top to bottom.

7. The mold-locking cylinder structure of injection molding machine according to claim 1, wherein: the sealing structure between the brake contracting rod and the end cover comprises a dustproof ring, a shaft oil seal and a second wear-resisting ring which are arranged on the inner surface of the end cover and are sequentially arranged from outside to inside at intervals.

8. The mold-locking cylinder structure of injection molding machine of claim 7, wherein: and a third O-shaped sealing ring is arranged between the shaft oil seal and the second wear-resisting ring on the inner surface of the end cover.

9. The mold-locking cylinder structure of an injection molding machine according to any one of claims 1 to 8, wherein: the lower oil port is arranged on the outer surface of the end cover and is L-shaped.

10. The injection molding machine mold locking cylinder structure of claim 9, wherein: the end cover is fixed at the bottom of the mounting seat through a plurality of bolts which are uniformly distributed on the circumference.