CN215849447U

CN215849447U - Forced resetting device for precise plastic mould ejector plate

Info

Publication number: CN215849447U
Application number: CN202022285181.0U
Authority: CN
Inventors: 朱小波; 朱琨
Original assignee: Shenzhen Jingjiechuan Technology Co ltd
Current assignee: Shenzhen Jingjiechuan Technology Co ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2022-02-18
Anticipated expiration: 2030-10-14

Abstract

The utility model relates to the technical field of precision molds, in particular to a forced resetting device for an ejector plate of a precision plastic mold, which comprises an upper mold base, wherein the lower side of the upper mold base is fixedly connected with an upper mold plate, the lower side of the upper mold plate is fixedly connected with a lower mold plate, the bottom of the lower mold plate is provided with a plurality of small holes, the lower side of the lower mold plate is provided with a lower mold base, four corners of the upper side of the lower mold base are fixedly connected with supporting columns, the upper ends of the supporting columns are fixedly connected with the bottom of the lower mold plate, the lower mold base and the supporting columns are of an integrated structure, and the ejector plate is arranged above the lower mold base.

Description

Forced resetting device for precise plastic mould ejector plate

Technical Field

The utility model relates to the technical field of precision molds, in particular to a forced resetting device for an ejector plate of a precision plastic mold.

Background

The plastic mold is a short name for a combined mold used for compression molding, extrusion molding, injection, blow molding and low-foaming molding. The coordination change of the male die, the female die and the auxiliary forming system of the die can process a series of plastic parts with different shapes and sizes. When the ejector pins are distributed below the die sliding block, the die ejector plate must be reset firstly after injection molding is finished, otherwise, the sliding block collides with the ejector pins in advance during die assembly, so that the die is damaged. The return of the existing mold ejector plate is generally realized by mounting a spring by a return pin, the spring has the defects of long service life, easy fatigue and the like, and the safe use of the mold cannot be ensured, so that a forced return device of the mold ejector plate is needed to ensure the normal use of the mold, and therefore, the utility model provides a forced return device for a precise plastic mold ejector plate for solving the problems.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a forced resetting device for an ejector plate of a precision plastic mold, so as to solve the problems mentioned in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: a forced resetting device for an ejector plate of a precise plastic mold comprises an upper mold base, wherein an upper mold plate is fixedly connected to the lower side of the upper mold base, the lower side of the upper mold plate is fixedly connected with a lower mold plate, a plurality of small holes are formed in the bottom of the lower mold plate, a lower mold base is arranged below the lower mold plate, pillars are fixedly connected to four corners of the upper side of the lower mold base, the upper ends of the pillars are fixedly connected with the bottom of the lower mold plate, the lower mold base and the pillars are of an integral structure, an ejector plate is arranged above the lower mold base, through holes are formed in four corners of the ejector plate, the through holes in the ejector plate are in sliding connection with the pillars, the ejector plate is located between the lower mold plate and the lower mold base, a plurality of ejector pins are fixedly connected to the upper surface of the ejector plate, the ejector pins are in one-to-one correspondence connection with the small holes in the bottom of the lower mold plate, the lower mold base is arranged as a cavity, and a driving mechanism is arranged in the cavity.

Preferably, the driving mechanism comprises two air cylinders fixedly connected to the bottom of the inner cavity of the lower die base, the two air cylinders are symmetrically distributed at two ends of the inner cavity of the lower die base, a piston rod is fixedly connected to the upper end of each air cylinder, two through holes are formed in the upper side of the lower die base, and the upper end of each piston rod penetrates through the through holes and is connected with the lower surface of the ejector plate.

Preferably, the left side and the right side of the lower die holder are fixedly connected with control switches, the control switches are electrically connected with the air cylinder, the upper end part of the piston rod is fixedly connected with the fixing seat, the bottom of the ejector plate is provided with a threaded hole, and the fixing seat is fixedly connected with the ejector plate through a bolt.

Preferably, the upper surface of the lower die holder is fixedly connected with a rubber pad, the rubber pad is positioned between the two piston rods, and the bolt is in threaded connection with the inner thread and the outer thread of the threaded hole in the bottom of the ejector pin plate.

Compared with the prior art, the utility model has the beneficial effects that:

1. the ejector plate forced resetting device abandons the traditional technology of resetting an ejector plate by installing a return spring, and changes a lower die holder into a cavity, and an air cylinder is installed in the cavity to drive the ejector plate to reciprocate up and down, so that the device is safe and stable, the situation that an ejector pin cannot return and is collided with a sliding block to be damaged can not occur, the safe service life of a die is ensured, and the die adopting the resetting device is more efficient and safe without additionally arranging the return spring;

2. the rubber pad has been installed to the upper surface of die holder, has cushioning effect to the thimble board, reduces the thimble board when reseing with the die holder's collision, has prolonged the life of mould.

Drawings

FIG. 1 is a schematic structural view of a plastic mold according to the present invention;

FIG. 2 is an enlarged view of the structure of the present invention at A;

FIG. 3 is a top view of a structure of the present invention at B.

In the figure: the device comprises an upper die holder 1, an upper die plate 2, a lower die plate 3, an ejector plate 4, an ejector pin 5, a lower die holder 6, a support column 7, a cylinder 8, a control switch 9, a piston rod 10, a fixed seat 11, a bolt 12 and a rubber pad 13.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution: a forced resetting device for an ejector plate of a precise plastic mold comprises an upper mold base 1, an upper mold plate 2 is fixedly connected to the lower side of the upper mold base 1, the lower side of the upper mold plate 2 is fixedly connected with a lower mold plate 3, a plurality of small holes are formed in the bottom of the lower mold plate 3 and used for enabling ejector pins 5 to eject a section bar, a lower mold base 6 is arranged below the lower mold plate 3, supporting columns 7 are fixedly connected to four corners of the upper side of the lower mold base 6, the upper ends of the supporting columns 7 are fixedly connected with the bottom of the lower mold plate 3, the lower mold base 6 and the supporting columns 7 are of an integral structure, an ejector plate 4 is arranged above the lower mold base 6, through holes are formed in four corners of the ejector plate 4, the through holes in the ejector plate 4 are in sliding connection with the supporting columns 7, the ejector plate 4 is located between the lower mold plate 3 and the lower mold base 6, a plurality of ejector pins 5 are fixedly connected to the upper side surface of the ejector pin plate 4, the ejector pins 5 are connected with the small holes in the bottom of the lower mold plate 3 in a one-to-one correspondence manner, the lower die holder 6 is a cavity, and a driving mechanism is arranged in the cavity and drives the ejector pin plate 4 to reciprocate up and down.

Further, the driving mechanism comprises two air cylinders 8 fixedly connected to the bottom of the inner cavity of the lower die holder 6, the two air cylinders 8 are symmetrically distributed at two ends of the inner cavity of the lower die holder 6, a piston rod 10 is fixedly connected to the upper end of each air cylinder 8, two through holes are formed in the upper side of the lower die holder 6, the upper end of each piston rod 10 penetrates through the through holes to be connected with the lower surface of the ejector plate 4, the ejector plate 4 is driven to move through the reciprocating motion of the piston rod 10, and the resetting actions of the ejector pins and the return pins are completed;

furthermore, the left side and the right side of the lower die holder 6 are fixedly connected with control switches 9, the control switches 9 are electrically connected with the air cylinder 8, the upper end part of the piston rod 10 is fixedly connected with a fixed seat 11, the bottom of the ejector plate 4 is provided with a threaded hole, and the fixed seat 11 is fixedly connected with the ejector plate 4 through a bolt 12;

further, the upper surface of the lower die holder 6 is fixedly connected with a rubber pad 13, the rubber pad 13 is positioned between the two piston rods 10, the impact force of the ejector plate 4 is relieved, the die is protected, and the bolt 12 is in threaded connection with the inner thread and the outer thread of the threaded hole in the bottom of the ejector plate 4.

The working principle is as follows: when the precise plastic mold thimble plate forced resetting device is used, the upper mold plate 2 and the lower mold plate 3 are firstly closed, a section cavity is formed inside the device, molten plastic is injected into the section cavity, the mold is cooled and formed, then the upper mold plate 2 is opened, the air cylinder 8 is started, the piston rod 10 moves upwards to drive the thimble plate 4 to move upwards, the thimble 5 on the thimble plate 4 ejects the formed section from the mold, then the air cylinder 8 drives the thimble plate 4 to move downwards to complete the resetting of the thimble plate 4, and finally the mold is closed again to perform the next injection molding; the ejector plate forced resetting device abandons the traditional technology of installing a needle return spring to reset the ejector plate 4, and changes a lower die holder 6 into a cavity, and an air cylinder 8 is arranged in the cavity to drive the ejector plate 4 to reciprocate up and down, so that the device is safe and stable, the situation that an ejector pin 5 cannot return to the original position and collides with a slide block to be damaged can not occur, the safe service life of a die is ensured, and the die adopting the resetting device is more efficient and safe without additionally arranging a needle return spring; the rubber pad 13 has been installed to the upper surface of lower bolster 6, has cushioning effect to thimble board 4, reduces thimble board 4 and the collision of lower bolster 6 when reseing, has prolonged the life of mould.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a force resetting means for accurate plastic mould thimble board, includes upper die base (1), its characterized in that: an upper template (2) is fixedly connected to the lower side of the upper template (1), the lower side of the upper template (2) is fixedly connected with a lower template (3), a plurality of small holes are formed in the bottom of the lower template (3), a lower template (6) is arranged below the lower template (3), pillars (7) are fixedly connected to four corners of the upper side of the lower template (6), the upper ends of the pillars (7) are fixedly connected with the bottom of the lower template (3), the lower template (6) and the pillars (7) are of an integral structure, an ejector pin plate (4) is arranged above the lower template (6), through holes are formed in the four corners of the ejector pin plate (4), the through holes in the ejector pin plate (4) are in sliding connection with the pillars (7), the ejector pin plate (4) is located between the lower template (3) and the lower template (6), a plurality of ejector pins (5) are fixedly connected to the surface of the upper side of the ejector pin plate (4), the ejector pins (5) are connected with the small holes in the bottom of the lower template (3) in a one-to-one correspondence mode, the lower die base (6) is a cavity, and a driving mechanism is arranged in the cavity.

2. The forced resetting device for the ejector plate of the precise plastic mold as claimed in claim 1, wherein: actuating mechanism includes cylinder (8) of fixed connection in die holder (6) inner chamber bottom, cylinder (8) set up to two, and the symmetric distribution is at the both ends of die holder (6) inner chamber, the upper end fixedly connected with piston rod (10) of cylinder (8), the upside of die holder (6) is opened has two through-holes, the upper end of piston rod (10) runs through the lower surface that the through-hole is connected with thimble board (4).

3. The forced resetting device for the ejector plate of the precise plastic mold as claimed in claim 2, wherein: the left and right sides fixedly connected with control switch (9) of die holder (6), control switch (9) and cylinder (8) electric connection, the upper end tip and fixing base (11) fixed connection of piston rod (10), the threaded hole is opened to the bottom of thimble board (4), fixing base (11) are through bolt (12) and thimble board (4) fixed connection.

4. The forced resetting device for the ejector plate of the precise plastic mold as claimed in claim 3, wherein: the upper surface of the lower die holder (6) is fixedly connected with a rubber pad (13), the rubber pad (13) is positioned between the two piston rods (10), and the bolt (12) is in threaded connection with the inner thread and the outer thread of a threaded hole at the bottom of the ejector plate (4).