CN201604267U - Injection mold with automatic scrap removal - Google Patents

Abstract

The utility model discloses an injection mold for automatically cutting off waste materials, which comprises a mold base and a mold core arranged on the mold base, a cutting device is arranged at a pouring port of the mold base corresponding to the mold core, and a driving device which can drive the cutting device to perform a cutting action is arranged behind the cutting device; the utility model has a simple structure, a cutting device and a driving device are arranged at the pouring port, and the material head can be automatically removed during product injection molding, so that the molded product does not have a runner material head, the working procedures in the post-processing process are reduced, the production efficiency is improved, the degree of automation is high, the labor intensity is low, and while a large amount of manpower and material resources are saved, the product quality is guaranteed, which is beneficial to the development of the enterprise.

Description

Injection mold with automatic scrap removal

technical field

The utility model relates to a mould, in particular to an injection mold for automatically cutting waste.

Background technique

At present, most of decorative products or consumer electronic products rely on mold forming; especially, with the development of modern electronics industry, various product shells need mold forming, and the role of mold is even more important. At the same time, The optimized design of molds and the improvement of related processes have also become higher goals pursued by the mold industry.

In the molding production of existing injection molding products, the molded product generally has a sprue tip, which is the molten plastic remaining in the sprue when the mold is opened and connected to the molded product in the mold cavity. Formed, the sprue tip generally needs to be removed by post-processing. The staff puts the product with the sprue tip on the jig, and operates the jig to remove the sprue tip. After removal, generally a burr will be formed on the removed edge, and the staff needs to trim to remove the burr. After the burr is removed, the product will be inspected and packaged. Such a post-processing process of the product is complicated, which requires more manpower, and also requires a jig specially designed for removing the sprue chip, and it often occurs that the jig damages the product when the sprue is removed.

In view of this, it is necessary to provide a device to overcome the problems in the prior art that the secondary processing of the product after the injection mold is formed is complicated and labor-intensive.

Utility model content

The purpose of this utility model is to provide an injection mold for automatically cutting off waste with simple structure, less labor intensity, fewer procedures and high production efficiency, aiming at the shortcomings of the above-mentioned existing injection molds.

The technical scheme that the utility model adopts for realizing the above object is:

An injection mold for automatically cutting waste, which includes a mold base and a mold core arranged on the mold base, a material cutting device is provided at the gate of the mold base corresponding to the mold core, and A driving device that can drive it to perform material cutting is arranged behind the material device.

The material cutting device includes a slider and a cutting knife insert with a blade-shaped head. The upper end of the cutting knife insert extends into the inner side of the sprue channel of the mold core, and the lower end is provided with a cross section in the form of a "T". ”-shaped oblique chute, and the front end of the slider is provided with an oblique boss that matches with the oblique chute, and the cross section is a “T”-shaped oblique boss, and the cutter insert slides The groove is vertically arranged on the inclined boss of the slider, and can move up and down correspondingly as the slider slides back and forth.

The driving device includes a plate and a miniature oil cylinder fixed on the support plate, the driving rod of the miniature oil cylinder is connected with the slider, and a The electronic travel switch that can control the work of the miniature oil cylinder.

It also includes a thimble, one end of which is wedge-shaped, and extends through the mold base into the sprue of the mold core, and the slider is provided with a long strip-shaped passage through which the ram can pass. hole, the length of the elongated through hole is slightly greater than the advancing stroke of the slider.

The beneficial effects of the utility model are: the utility model has a simple structure, and a material cutting device and a driving device are provided at the sprue mouth, which can automatically remove the material tip when the product is formed, so that the formed product does not have a sprue material tip , Improve production efficiency, high degree of automation, low labor intensity, reduce the process in the post-processing process, save a lot of manpower and material resources, and ensure product quality.

Below in conjunction with accompanying drawing and embodiment, the utility model is further described.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present utility model;

Fig. 2 is a schematic diagram of an exploded structure of Fig. 1;

Fig. 3 is a schematic diagram of an exploded structure of the material cutting device and the driving device in Fig. 1 .

Detailed ways

Embodiment: see Fig. 1, Fig. 2 and Fig. 3, a kind of injection mold of the utility model automatically cuts off waste material, and it comprises a mold base 2 and a mold core 1 that is arranged on this mold base 2, on this mold base 2 A cutting device 3 is provided corresponding to the sprue 11 of the mold core 1 , and a driving device 4 is arranged behind the cutting device 3 to drive it to perform a cutting action. The drive device 4 includes a plate 41 and a miniature oil cylinder 42 fixed on the support plate 41. The drive rod 421 of the miniature oil cylinder 42 is connected with the slider 31, and the mold base 2 corresponds to the slider 31. The position of the rear side is provided with an electronic travel switch 43 that can control the work of the miniature oil cylinder 42 . In other embodiments, the miniature oil cylinder 42 can be other driving devices 4, such as air cylinders, hydraulic presses, etc.; the cutting device 3 includes a slider 31 and a cutting knife insert 32 whose head is in the shape of a blade. The upper end of the knife insert extends into the inner side of the sprue channel of the mold core 1, and the lower end is provided with an oblique chute 321 with a "T" shape in cross section, and a front end of the slider 31 is provided with the oblique sliding groove 321. Groove 321 matches, cross-section is a "T" shaped inclined boss 311, the cutter insert 32 is vertically arranged on the inclined boss 311 of the slider 31 through the inclined chute 321, and can follow The slider 31 slides and moves up and down accordingly. It also includes a ejector pin 5 that can push out the sprue head. One end of the ejector pin 5 is wedge-shaped, and it passes through the mold base 2 and extends into the sprue channel of the mold core 1, and is positioned on the slider 31 A strip-shaped through-hole is provided on the top to allow the push rod 5 to pass through, and the length of the strip-shaped through-hole is slightly greater than the pushing stroke of the slider 31 .

During the production process, the molten plastic is injected into the mold core 1 through the sprue 11. When the molten plastic fills the cavity and the plastic is solidified but not completely solidified, the electronic travel switch 43 drives the micro oil cylinder according to the feedback signal. 42 makes the slider 31 slide forward, thereby forcing the cutter insert 32 to move upwards to perform material cutting, and the sprue head on the product in the cavity is cut off; then, the electronic travel switch 43 senses, so that the miniature oil cylinder 42 Reset, drive the slider 31 to slide backward, so that the cutter insert 32 is reset; after cooling, the male mold of the core 1 moves downward to separate from its female mold, and at this time, the ejector rod 5 moves upward and passes through its wedge-shaped end. The sprue head falls off, and the production of injection molding products is completed.

As described above in the embodiments of the present invention, other molds with the same or similar structures are within the protection scope of the present invention.

Claims (4)

1. An injection mold for automatically removing waste, comprising a mold base and a mold core arranged on the mold base, characterized in that, a cutting material is provided at the sprue of the mold base corresponding to the mold core device, and a driving device that can drive it to perform cutting action is arranged behind the cutting device. 2. The injection mold for automatically cutting waste according to claim 1, wherein the cutting device comprises a slider and a blade-shaped cutter insert whose upper end extends Into the inside of the sprue channel of the mold core, the lower end is provided with an inclined chute whose cross section is a "T" shape, and the front end of the slider is provided with the inclined chute, the cross section is A "T"-shaped inclined boss, the cutter insert is vertically arranged on the inclined boss of the slider through an inclined chute, and can move up and down correspondingly as the slider slides back and forth. 3. The injection mold for automatically removing waste according to claim 1 or 2, wherein the drive device includes a plate and a miniature oil cylinder fixed on the support plate, the drive rod of the miniature oil cylinder and the The slide block is connected, and an electronic travel switch that can control the operation of the miniature oil cylinder is provided on the position of the mold base corresponding to the rear side of the slide block. 4. The injection mold for automatically cutting waste according to claim 1 or 2, characterized in that it also includes a thimble, one end of which is wedge-shaped, and extends through the mold base into the sprue of the mold core , and the slider is provided with a strip-shaped through-hole through which the ejector rod can pass, and the length of the strip-shaped through-hole is slightly greater than the advancing stroke of the slider.

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