CN219076422U

CN219076422U - Spring plate type insert structure assisting ejection

Info

Publication number: CN219076422U
Application number: CN202222992367.9U
Authority: CN
Inventors: 钟光辉; 王弟; 吴小荣
Original assignee: Megaforce Shanghai Electronic & Plastic Co ltd
Current assignee: Megaforce Shanghai Electronic & Plastic Co ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-05-26
Anticipated expiration: 2032-11-10

Abstract

The utility model relates to an ejector plate type insert structure for assisting ejection in an injection mold, wherein a male mold plate, a female mold plate and an insert are arranged in the injection mold, the insert is arranged between the female mold plate and the male mold plate, an ejector plate is arranged at the bottom of the male mold plate, a plurality of screw holes are arranged on the ejector plate, the sections of the screw holes are dumbbell-shaped, round limiting holes with slightly larger diameters are arranged at the bottoms of the screw holes, round spring holes with slightly larger diameters are arranged at the tops of the screw holes, the ejector plate is fixed on the male mold plate through the screw holes, a rear end nut of the screw is embedded into the round limiting holes and leaves a movement gap, a spring is embedded in the round spring holes of the screw holes, the spring is sleeved outside the screw, the front ends of the screw are screwed into the screw holes at the bottoms of the male mold plate, and the bottoms of the insert are fixed on the upper surface of the ejector plate through bolts. The structure of the utility model effectively solves the problem of difficult ejection and demolding of the product, and effectively reduces the related production risk and cost.

Description

Spring plate type insert structure assisting ejection

Technical Field

The utility model relates to an injection molding process, in particular to an auxiliary ejection spring sheet type insert structure for ejection before ejection on an injection mold.

Background

The structural design of the existing plastic products has the characteristics of diversification and complicacy, the plastic products are generally manufactured in an injection molding mode, and particularly, the plastic products are realized by utilizing a male mold and a female mold on an injection molding machine, and the complicated products are often provided with inserts, namely, the inserts are firstly pumped in.

When the plastic product is produced by injection molding, the product is provided with more or soft and deep product glue positions, so that the coating force of the product coated on the mold is overlarge, and the product is not easy to eject and demould. Because of the limitation of the structural design of the product, the demolding is difficult to realize by enlarging the mold pulling angle. Such more or deeper glue sites are also generally difficult to eject from the mold using a typical ejector pin ejection design.

The existing traditional injection mold is ejected and demolded, and is simple and little in main, the number of ejector pins, the area of the ejector pins and the length of the ejector pins are increased or the product is ejected by designing secondary ejection. However, these are limited by the structural design of the product, and it is difficult to simply and effectively increase the number, and the improvement effect is not obvious, and the problem of difficult ejection and demolding of the product still exists. Or even if the die is removed, the problems of ejection deformation, ejection, easy clamping of the ejector pin of the die and the like of the product can be caused. If a complex ejection process is adopted, for example, a cylinder core pulling process is added or a sliding block mechanism inside and outside a mold is added to realize product demoulding and ejection. However, complex processes can greatly increase the complexity and cost of the mold, less favorable production and cost control.

Disclosure of Invention

The utility model aims to solve the problem of difficult product demolding caused by difficult ejection in injection molding, and provides an auxiliary ejection spring sheet type insert structure for ejection before ejection on an injection mold. The structural design of the utility model requires that the complex design mechanisms such as the complexity of the mould and the like are not increased under the condition of not changing the design of the original product, and the mould structure is ensured to be on the basis of the existing traditional mould, so that the suction sub firstly breaks away from the product surface, the coating force of the product on the mould is reduced, the problem of difficult ejection and demoulding of the product is effectively solved, the production is ensured to be concise and effective, and the related production risk and cost are effectively reduced.

In order to achieve the above object, the present utility model provides the following technical solutions:

the utility model provides an auxiliary ejecting's spring plate formula mold insert structure in injection mold, be equipped with public template, female die board and mold insert in the injection mold, the mold insert is provided with between female die board and the public template, its characterized in that the bottom of public template is equipped with a spring plate, is equipped with a plurality of screw holes on this spring plate, and the cross-section of this screw hole is dumbbell type, is equipped with the circular spacing hole of diameter slightly great in the bottom of screw hole, and the top of screw hole is equipped with the circular spring hole of diameter slightly great, a plurality of screws pass the screw hole fix the spring plate on the public template, the rear end nut of screw imbeds circular spacing hole and leaves the motion clearance the circular spring hole of screw hole is embedded with the spring, and this spring housing is located the outside of screw, and the front end of screw is screwed into in the screw of public template bottom the spring plate is in the state of compressing tightly with public template, the bottom of mold insert is fixed through the bolt the upper surface of spring plate.

In the spring plate type insert structure assisting ejection in the injection mold, as an optimal design, the spring plate is of a square structure, and screw holes are formed in four corners of the square structure.

In the spring plate type insert structure assisting ejection in the injection mold, as an optimal design, the bottom of the spring plate is arranged on a machine table, and the middle part of the machine table is provided with a spring plate capable of moving up and down.

In the spring plate type insert structure for assisting ejection in the injection mold, as an optimal design, the bottom of the insert is fixed on a spring plate through four bolts, and the positions of the four bolts are distributed in a four-corner symmetrical mode.

In the spring plate type insert structure assisting ejection in the injection mold, as an optimal design, the depth of the round limiting hole is larger than the height of the rear end screw cap, and a gap for advancing and retreating is reserved when the rear end screw cap is embedded into the round limiting hole.

In the spring plate type insert structure assisting ejection in the injection mold, as an optimal design, the combined elastic force of the springs is larger than the weight of the male mold plate. So that when the male die is separated from the female die, the male die and the spring plate can be sprung apart to leave a gap.

In the spring plate type insert structure for assisting ejection in the injection mold, as an optimal design, the ejection distance between the male mold plate and the spring plate is 2-10mm.

Based on the technical scheme, the spring plate type insert structure assisting ejection in the injection mold has the following technical advantages through practical application:

1. the spring plate type insert structure is applied to an ejection demoulding structure on an injection mould, a plate is added behind a male mould plate and in front of a thimble plate of the mould, and meanwhile, a spring is additionally arranged between the male mould plate and the newly added plate, so that the newly added plate is changed into a spring plate which can be sprung by the spring, the spring plate is fixedly connected with an insert on the original male mould, the male mould insert can move along with the spring plate, the novel spring plate type insert is changed into a novel spring plate type insert, the coating force of a product on the mould is greatly reduced, and the ejection demoulding of the product can be easily and smoothly realized by using the thimble.

2. The spring plate type insert is simple and effective in structure, and the problem that products can be smoothly demolded from a die only by adding a complex mechanism without increasing the die difficulty structure is fundamentally solved, so that the problem that the coating force of the products on the die in an injection die is too large to normally eject and demold is solved, the die structure is greatly simplified, the production efficiency is improved, and the quality requirements of customers are met.

Drawings

Fig. 1 is a schematic view of an ejection structure of an injection mold in the prior art.

Fig. 2 is a schematic diagram showing a closed state of a spring plate insert structure for assisting ejection in an injection mold according to the present utility model.

Fig. 3 is a schematic diagram of an ejection state of an ejection-assisted spring plate insert structure in an injection mold according to the present utility model.

Fig. 4 is a schematic diagram of a slit portion of an ejector plate insert structure of the injection mold for assisting ejection.

Wherein, 1-a male template 2-an insert 3-a female template 4-an ejector plate 5-an ejector plate 6-a spring 7-a screw

Detailed Description

The following will further describe in detail the structure of the spring plate insert for assisting ejection in the injection mold according to the present utility model with reference to the drawings and the specific embodiments, so as to make the structural composition and the working manner thereof more clearly understood, but not limit the scope of the present utility model.

As shown in fig. 1, in the injection mold of the prior art, a male mold plate 1, a female mold plate 3 and an insert 2 are provided, and the insert 2 is also called an insert or is drawn into the insert first. The insert 2 is arranged between a female die plate 3 and a male die plate 1, the male die plate 1 is arranged on a machine table, and an ejector pin plate 4 capable of moving up and down is arranged in the middle of the machine table.

The utility model relates to a spring plate type insert structure for assisting ejection in an injection mold, which is improved on the prior art. As shown in fig. 2 and 3, a spring plate 5 is provided at the bottom of the male mold plate 1. The elastic plate 5 is provided with a plurality of screw holes penetrating up and down, the section of the screw holes is dumbbell-shaped, the bottoms of the screw holes are provided with round limiting holes with slightly larger diameters, the tops of the screw holes are provided with round spring holes with slightly larger diameters, and a plurality of screws 7 penetrate through the screw holes to fix the elastic plate 5 on the male template 1.

The rear end screw cap of the screw 7 is embedded into the circular limiting hole and a movement gap is reserved, the depth of the circular limiting hole is larger than the height of the rear end screw cap, and when the rear end screw cap is embedded into the circular limiting hole, a gap for the front end screw cap to advance and retreat is reserved in the circular limiting hole, so that the design is a space convenient for spring opening and compression. A spring 6 is embedded in the round spring hole of the screw hole, the spring 6 is sleeved outside the screw 7, and the front end of the screw 7 is screwed into the screw hole at the bottom of the male template 1.

When the spring plate 5 is closed with the male template 1, the springs 6 are in a compressed state, and the combined elastic force of the springs 6 is larger than the weight of the male template 1. When the male die and the female die are separated, a gap is reserved between the male die and the spring plate, and the spring distance between the male die and the spring plate is 2-10mm, so that the design requirement can be met. Further, the bottom of the insert 2 is fixed to the upper surface of the spring plate 5 by bolts. Specifically, the bottom of the insert 2 is fixed on the spring plate 5 through four bolts, and the positions of the four bolts are distributed in a four-corner symmetrical manner.

Specifically, the spring plate 5 has a square structure, and screw holes are formed at four corners of the square structure. The bottom of the spring plate 5 is arranged on a machine, the upper edge of the machine is propped against the bottom of the spring plate 5, and the bottom of a nut of the screw 7 is pressed on the machine.

The utility model mainly adds a spring plate structure simply on the basis of ensuring the traditional mould structure by providing a novel spring plate type mould design mechanism with a first suction sub-structure. In injection molding, the sequence of mold opening and closing is utilized to complete the movement of the spring plate and the insert (i.e. the insert is drawn in first).

As shown in fig. 2, when the mold is closed, the newly added spring plate is pressed back to the male mold plate 1 by using the mold closing pressure of the machine, and the spring plate 5 drives the insert 2 to synchronously return to the design rubber surface of the male mold core product, so that the product can be injection molded. As shown in fig. 3, when the injection molding is completed, the male mold plate 1 of the mold is opened along with the mold opening, and when the male mold plate 1 is opened, the spring plate 5 is also spring-opened from the male mold plate 1 by the force of the spring, as shown in fig. 4. The spring plate 5 drives the first suction rod to be separated from the glue position surface of the product, so that the effect of reducing the coating force of the product on the die is achieved, and the product can be easily ejected and demoulded.

The principle of injection molding production on a machine table and the movement sequence of mold opening and closing and product ejection are the same as the action principle of the traditional conventional mold. The spring is additionally arranged between the male template and the newly-added spring plate, so that the newly-added plate becomes a spring plate capable of bouncing. The spring plate is fixedly connected with the insert on the original male die, and the insert which is firstly drawn in acts together with the spring plate, so that the novel spring plate type firstly drawn in insert is changed into a novel spring plate type firstly drawn in insert. The added spring plate and the action of drawing in the spring first are synchronous, and the molding cycle is the same in the normal action of the switch die without any increase and extension.

Claims

1. The utility model provides an auxiliary ejecting's elastic lamina type mold insert structure, is equipped with public template, female die plate and mold insert in the injection mold, the mold insert sets up between female die plate and public template, its characterized in that the bottom of public template is equipped with an elastic lamina, is equipped with a plurality of screw holes on this elastic lamina, and the cross-section of this screw hole is dumbbell type, is equipped with the circular spacing hole of diameter slightly big in the bottom of screw hole, and the top of screw hole is equipped with circular spring hole, a plurality of screws pass the screw hole fix the elastic lamina on public template, the rear end nut of screw imbeds circular spacing downthehole and leaves the motion clearance the circular spring hole of screw hole is embedded and is located the outside of screw, and this spring housing is located in the screw of screw front end screw to public template bottom in when elastic lamina and public template are closed, the spring is in the state that compresses tightly, the bottom of mold insert is fixed through the bolt the upper surface of elastic lamina.

2. The ejection assisting spring plate insert structure according to claim 1, wherein the spring plate is of a square structure, and screw holes are formed in four corners of the square structure.

3. The ejection assisting spring plate type insert structure according to claim 1, wherein the bottom of the spring plate is arranged on a machine table, and the middle of the machine table is provided with an ejector plate capable of moving up and down.

4. The ejection assisting spring plate type insert structure according to claim 1, wherein the bottom of the insert is fixed on the spring plate through four bolts, and the positions of the four bolts are distributed in a four-corner symmetrical mode.

5. The assisted ejection spring plate insert structure of claim 1, wherein the depth of the circular limiting aperture is greater than the height of the back end nut, leaving a gap for forward and reverse movement when the back end nut is inserted into the circular limiting aperture.

6. The ejection assisting spring plate insert structure according to claim 1, wherein a combined elastic force of a plurality of the springs is larger than a weight of the male die plate.

7. The ejection assisting spring plate type insert structure according to claim 1, wherein the ejection distance between the male die plate and the spring plate is 2-10mm.