CN111791441A

CN111791441A - Mould capable of automatically cutting off pouring gate in mould

Info

Publication number: CN111791441A
Application number: CN202010673276.1A
Authority: CN
Inventors: 陈梦洁; 韩鹏峰; 陶良良; 钱功海
Original assignee: Zhejiang Tongzheng Pipe Technology Co ltd
Current assignee: Zhejiang Tongzheng Pipe Technology Co ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2020-10-20

Abstract

The invention provides a mould for automatically cutting off a sprue in a mould, which relates to the technical field of pipe processing, and comprises a mould body for injection moulding of a pipe fitting, wherein the mould body comprises a front template and a rear template; the cutting mechanism is arranged on the side part of the rear template; the cutting mechanism comprises a cutter, a cutter rest for fixing the cutter, a fixed frame fixed on the side part of the rear template, and a driving device connected with the cutter rest and arranged on the fixed frame; the cutter can extend into the gate position through the driving device. The invention can realize the following technical effects: according to the invention, the sprue is directly cut off in the die through the cutting mechanism, the speed and the efficiency are high, the subsequent sprue cutting process is not required, the labor cost is greatly reduced, the labor force is liberated, and the production efficiency is improved.

Description

Mould capable of automatically cutting off pouring gate in mould

Technical Field

The invention relates to a mold for automatically cutting off a sprue in a mold, and belongs to the technical field of pipe processing.

Background

In the production process of the PVC pipe fitting, the pipe fitting is molded in a cavity, and a pipe fitting pouring gate left after plastic is cooled is arranged between the molded injection molding pipe fitting and an injection molding runner. The pipe needs to be cut off in the subsequent pipe processing procedure. At present, the pipe fitting product with the large sprue is subjected to injection molding and then generally adopts manual removal of the sprue, so that the workload of workers is large, the working strength is high, the efficiency is low, and full-automatic production cannot be realized.

The present application was made based on this.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a mold for automatically cutting off a sprue in the mold.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a mold for automatically cutting off a sprue in a mold comprises a mold body for injection molding of a pipe fitting, wherein the mold body comprises a front mold plate and a rear mold plate, the injection molding of the pipe fitting is formed on the rear mold plate, and the sprue is formed between the injection molding of the pipe fitting and an injection molding runner; the cutting mechanism is arranged on the side part of the rear template; the cutting mechanism comprises a cutter, a cutter rest for fixing the cutter, a fixing frame fixed on the side part of the rear template, and a driving device which is connected with the cutter rest and is arranged on the fixing frame; the cutter can extend into the gate position through a driving device.

Furthermore, in order to improve the production efficiency, two rows of four injection molding stations are arranged on the rear template, the two rows of injection molding stations share one injection molding runner, two ends of the injection molding runner are respectively provided with two discharge ports, and four gates are formed by the injection molding runners on the four injection molding stations respectively.

Further, in order to further improve work efficiency, the cutting mechanism is provided with two, and the symmetry is installed in the both sides of back template, and wherein every cutting mechanism cutter is equipped with two, and two cutters of every cutting mechanism cut off the runner of moulding plastics runner each end both sides discharge gate position respectively.

Furthermore, in order to ensure the movement precision of the tool rest fixing plate, the cutting mechanism further comprises a tool rest fixing plate connected with the tool rest and positioned on the fixing frame, a guide rail arranged on the fixing frame and positioned below the tool rest fixing plate, and a sliding block connected with the guide rail in a sliding manner and fixedly connected with the tool rest fixing plate.

Further, in order to conveniently and accurately control the stroke of the cutter, the driving device adopts an air cylinder or an electric cylinder, and a guide rod of the air cylinder or the electric cylinder is fixed with the cutter frame.

The invention can realize the following technical effects: according to the invention, the sprue is directly cut off in the die through the cutting mechanism, the speed and the efficiency are high, the subsequent sprue cutting process is not required, the labor cost is greatly reduced, the labor force is liberated, and the production efficiency is improved.

Drawings

FIG. 1 is a front view of a mold for automatically cutting off a gate in the mold according to the present embodiment before gate cutting (when the front and rear mold plates are not separated);

FIG. 2 is a front view of a mold gate of the present embodiment (after separating the front and rear mold plates);

FIG. 3 is a perspective view of the mold of this embodiment before gate cutting for automatic gate cutting;

FIG. 4 is a top view of the mold of FIG. 3;

FIG. 5 is a perspective view of a mold gate of the present embodiment illustrating an automatic gate cut in the mold;

fig. 6 is a top view of the mold of fig. 5.

Description of the labeling: the die comprises a die body 1, a front die plate 11, a rear die plate 12, a cutting mechanism 2, a cutter 21, a cutter frame 22, a cutter frame fixing plate 23, a fixing frame 24, a cylinder 25, a guide rod 26, a slide block 27, a guide rail 28, an injection molding pipe piece 31, an injection molding runner 32, a pouring gate 33, a first push plate 41, a second push plate 42, an ejector pin 43, an inclined top 44 and a limiting block 45.

Detailed Description

In order to make the technical means and technical effects achieved by the technical means of the present invention more clearly and more perfectly disclosed, the following embodiments are provided, and the following detailed description is made with reference to the accompanying drawings:

as shown in fig. 1 to 6, the mold for automatically cutting off the gate 33 in the mold of the embodiment includes a mold body 1 for injection molding the pipe 31, the mold body 1 includes a front mold plate 11 and a rear mold plate 12, the injection molding pipe 31 is formed on the rear mold plate 12, and the gate 33 is formed between the injection molding pipe 31 and the injection molding runner 32; the cutting mechanism 2 is arranged at the side part of the rear template 12; the cutting mechanism 2 includes a tool 21, a tool holder 22 for fixing the tool 21 (in this embodiment, the tool 21 is fixed to the tool holder 22 by a screw and a positioning pin), a fixing frame 24 fixed to a side portion of the rear mold plate 12, and a driving device connected to the tool holder 22 and mounted on the fixing frame 24; the tool 21 can be extended to the gate 33 position by the driving device. Through shutdown mechanism 2, realize directly amputating runner 33 in the mould, it is high-efficient, need not follow-up increase and prune the flow of runner 33, greatly reduced cost of labor liberates the labour, improves production efficiency.

In this embodiment, the rear mold plate 12 is provided with two rows of injection molding stations, the two rows of injection molding stations share one injection molding runner 32, two ends of the injection molding runner 32 are provided with two discharge ports, and the injection molding pipe fittings 31 on the four injection molding stations form four gates 33 respectively.

In the embodiment, two cutting mechanisms 2 are arranged and symmetrically arranged on two sides of the rear mold plate 12, wherein two cutters 21 are arranged on each cutting mechanism 2, and the two cutters 21 of each cutting mechanism 2 respectively cut off the gates 33 at the discharge ports on two sides of each end of the injection runner 32. In the cutting mechanism 2 of the embodiment, each cutting mechanism 2 is provided with two cutters 21, and the two side gates 33 at one end of the injection runner 32 can be cut simultaneously by one-time stretching and cutting action, so that the cutting efficiency is high; in addition, the cutting mechanism 2 can be controlled to simultaneously perform the stretching-in cutting operation, so that the gates 33 at two ends can be simultaneously cut, namely, the four gates 33 can be simultaneously cut, and the production efficiency is further improved.

In this embodiment, the cutting mechanism 2 further includes a tool holder fixing plate 23 connected to the tool holder 22 and located on the fixing frame 24, a guide rail 28 mounted on the fixing frame 24 (in the fixing frame 24) and located below the tool holder fixing plate 23, and a slider 27 slidably connected to the guide rail 28 and fixedly connected to the tool holder fixing plate 23. The slide block 27 and the guide rail 28 can move relatively while ensuring the accuracy of the movement of the tool holder fixing plate 23.

In the embodiment, the driving device adopts an air cylinder 25 or an electric cylinder, and the guide rod 26 of the air cylinder 25 or the electric cylinder is fixed with the tool rest 22 (in the embodiment, the tool rest 22 is connected with the tool rest fixing plate 23 and the guide rod 26 through screws), so that the stroke of the tool 21 can be accurately controlled, and the gate 33 can be cut off quickly and efficiently.

The mold for automatically cutting off the gate 33 in the mold of this embodiment of the invention certainly further includes a discharging mechanism, where the discharging mechanism includes a first push plate 41 and a second push plate 42 which are installed at one end of the rear mold plate 12 far away from the front mold plate 11 and are sequentially stacked, an ejector pin 43 fixed on the first push plate 41 and located below the injection molding pipe 31, and an inclined ejector 44 fixed on the first push plate 41 and located at one side of the injection molding pipe 31; the first push plate 41 and the second push plate 42 are fixed with each other, and the second push plate 42 is limited in the limiting block 45. The bottom of the inclined top 44 is fixed with the first push plate 41 and moves along with the movement of the first push plate 41, the inclined top 44 mainly has the function of facilitating demoulding of a poured product, is related to a mould structure and is unrelated to a gate cutting structure, and the structure and the principle of the inclined top are the prior art, and are not described herein again.

The working principle of the mold for automatically cutting off the gate 33 in the mold of the embodiment is as follows: after the injection molding of the mold is completed, the front mold plate 11 and the rear mold plate 12 are separated, the mold is opened from the A-A parting surface, the injection molding pipe 31 is left on the rear mold plate 12 due to the structure of the injection molding pipe, at the moment, the air cylinder 25 (or the electric cylinder) works, the guide rod 26 on the air cylinder 25 (or the electric cylinder) can be pushed out for a certain stroke, the guide rod 26 is fixed with the cutter frame 22 (fixed through threads in the embodiment), at the moment, the cutter frame 22 can drive the cutter 21 to advance for a certain stroke, and then the cutter 21 can cut off the sprue 33 of the injection molding pipe 31. Similarly, the same structure on the other side can work simultaneously, so that the four gates 33 on the four injection-molded pipe fittings 31 are automatically cut off; then, the cylinder 25 (or electric cylinder) is operated to retract the guide bar 26 to the initial position, and the tool 21 is also retracted by the tool post 22. Then, the first push plate 41 and the second push plate 42 are ejected forwards, the ejector pin 43 and the inclined ejector 44 are ejected forwards, then the first push plate 41, the second push plate 42, the ejector pin 43 and the inclined ejector 44 are ejected for a certain distance under the action of the limiting block 45 and stop moving, at this time, the injection molding pipe 31 and the injection molding runner 32 are already pushed out of the rear template 12, and the injection molding pipe 31 and the injection molding runner 32 fall down under the action of gravity. And then the die is closed, the limiting block 45, the first push plate 41, the second push plate 42, the ejector pins 43 and the inclined ejector pins 44 are all retracted to the initial positions, and the injection molding in the next period can be carried out.

The above description is provided for the purpose of further elaboration of the technical solutions provided in connection with the preferred embodiments of the present invention, and it should not be understood that the embodiments of the present invention are limited to the above description, and it should be understood that various simple deductions or substitutions can be made by those skilled in the art without departing from the spirit of the present invention, and all such alternatives are included in the scope of the present invention.

Claims

1. A mold for automatically cutting off a sprue in a mold comprises a mold body for injection molding of a pipe fitting, wherein the mold body comprises a front mold plate and a rear mold plate, the injection molding of the pipe fitting is formed on the rear mold plate, and the sprue is formed between the injection molding of the pipe fitting and an injection molding runner; the method is characterized in that: the cutting mechanism is arranged on the side part of the rear template; the cutting mechanism comprises a cutter, a cutter rest for fixing the cutter, a fixing frame fixed on the side part of the rear template, and a driving device which is connected with the cutter rest and is arranged on the fixing frame; the cutter can extend into the sprue position through a driving device; the driving device adopts an air cylinder or an electric cylinder, and a guide rod of the air cylinder or the electric cylinder is fixed with the tool rest; the two cutting mechanisms are symmetrically arranged on two sides of the rear template.

2. The mold for automatically cutting off a gate in a mold according to claim 1, wherein: the rear template is provided with two rows of four injection molding stations, the two rows of injection molding stations share one injection molding runner, two ends of the injection molding runner are provided with two discharge ports, and four gates are formed by the injection molding runners on the four injection molding stations respectively.

3. The mold for automatically cutting off the gate in the mold according to claim 2, wherein: wherein every shutdown mechanism cutter is equipped with two, and two cutters of every shutdown mechanism cut off the runner of moulding plastics runner each end both sides discharge gate position respectively.

4. A mold for automatically cutting off a gate in a mold according to claim 1, 2 or 3, wherein: the cutting mechanism further comprises a knife rest fixing plate connected with the knife rest and positioned on the fixing frame, a guide rail arranged on the fixing frame and positioned below the knife rest fixing plate, and a sliding block connected with the guide rail in a sliding manner and fixedly connected with the knife rest fixing plate.