CN201231545Y - Die - Google Patents

Abstract

A mold includes: an upper mold, a lower mold and a forming ejector mechanism, the upper mold, the lower mold and the forming ejector mechanism together form a forming cavity, and the forming ejector mechanism participates in the shaping of the product surface. Adopting the mold can eliminate the marks left by the thimble structure on the surface of the formed product in the mold with the thimble mechanism, and prevent the deformation of the formed product due to excessive stress concentration in the demoulding process, thereby improving product productivity and yield.

Description

a mold

technical field

The utility model relates to a mold, in particular to a mold with a forming and ejecting mechanism.

Background technique

According to the known technical characteristics, the demoulding products of the existing thimble structure, in the process of product demoulding, the thimble structure leaves traces on the product surface, which cannot be completely removed. Transfer to a non-sensitive surface. Such treatment does not eliminate the remaining traces of the thimble structure, if the remaining traces are too obvious, the demoulding product will still become a waste product and the yield rate will be reduced. Or in the process of product processing, after the shaped product is formed, a grinding process is added to eliminate the traces of the thimble structure. In this way, due to the increase of the production process, the product productivity is reduced.

At the same time, in order to eliminate the traces of the ejector pin structure as much as possible, the common practice is to make the contact area between the ejector pin and the surface of the formed product as small as possible, but this will make the ejection process of the formed product difficult due to the contact between the ejector pin structure and the surface of the formed product. The area is small, and the stress is excessively concentrated, which is easy to cause deformation of the formed product, thereby reducing the yield.

Utility model content

The main purpose of the utility model is to solve the problems of traces left by the thimble structure on the demoulding product and demoulding deformation, and to provide a mold with a forming ejection mechanism that participates in surface forming and prevents excessive stress concentration during the demoulding process.

The technical scheme of the utility model is:

A mold, comprising: an upper mold 10, a lower mold 20 and a forming ejector mechanism 30, wherein the upper mold, the lower mold and the forming ejector mechanism together form a forming cavity, and the forming ejector mechanism participates in Forming of the product surface.

The lower mold is provided with a through hole, and the forming ejection mechanism penetrates the lower mold through the through hole and extends into the forming cavity.

The forming and ejecting mechanism is composed of a base 301 and a forming and ejecting mechanism main body 302 connected to the base.

A preferred solution is that the forming and ejecting mechanism is a column with a stepped structure. Wherein the base of the step column is slightly larger than the main body of the step column, the base can be designed as a cylindrical column 301, and can also be designed as a column structure of other shapes, the main part of the step structure has a part that participates in product forming Surface, the other end of the main part is connected on the base, so that it becomes a common whole with the base. In order to facilitate the movement of the forming ejector mechanism in the through hole of the lower die, the column between the forming surface and the base can be designed as a column with a cross-sectional shape of the vertical central axis consistent with the projection shape of the forming surface on the base body.

The surface of the forming ejection mechanism that participates in product surface forming is a complex curved surface.

The complex curved surface of the forming and ejecting mechanism may be a plane complex curved surface, or a three-dimensional complex curved surface.

The mold also has a limiting device 40 .

The limiting device has a groove, and the groove cooperates with the lower die to form a movement space of the forming ejection mechanism.

The mold also has an upper fixing plate and a lower fixing plate, the upper mold is fixed on the upper fixing plate through the upper surface, the lower mold is connected with a limiting device, and the limiting device is fixed on the lower fixing plate.

The beneficial effect of the mold provided by the utility model is that when the main body of the forming ejection mechanism participates in the forming surface with complex curved surfaces, such as landscapes, cartoons, figures, fruits and other patterns, these patterns can be three-dimensional patterns or flat patterns , corresponding patterns can be formed on the surface of the shaped product to achieve the effect of beautiful shaped products.

Another beneficial effect of the mold provided by the utility model is that after the product is formed, in the process of ejecting the formed product, the surface of the forming ejection mechanism that participates in the forming acts directly on the forming part, so that the demoulding force acts on the formed product. Surface, avoiding product deformation due to excessive stress concentration, effectively improving productivity and yield.

Description of drawings:

Fig. 1 is the utility model mold structure schematic diagram;

Fig. 2 is the schematic diagram of the completion of forming of the utility model;

Fig. 3 is a schematic diagram of the demoulding state of the utility model;

Fig. 4 is the schematic diagram of the end of demoulding of the utility model;

Fig. 5 is a perspective view of the forming and ejecting mechanism implemented by the utility model.

In the drawings: 10—upper mold, 20—lower mold, 30—forming ejector mechanism, 301—base of forming ejector mechanism, 302—body of forming ejector mechanism, 40—limiting device, 50—ejecting device, M1—forming raw material, M2—forming product.

Detailed ways

Below in conjunction with accompanying drawing, the embodiment of the present utility model is described in detail.

As shown in Figure 1 , it is a schematic diagram of the mold structure of the present invention, and the mold is composed of an upper mold 10 , a lower mold 20 , a forming ejector mechanism 30 , a limiting device 40 , an ejector device 50 and a fixed plate 60 .

Wherein the upper mold 10, the lower mold 20 and the forming ejector mechanism 30 together form a forming cavity, and the forming ejector mechanism 30 participates in the shaping of the product surface.

There are two fixing plates, an upper fixing plate 60 is used to fix the upper mold 10, and a lower fixing plate 60 is used to fix the limiting device 40, and the lower mold 20 is indirectly fixed on the lower fixing plate 60 through the limiting device 40 , The lower fixing plate 60 also has one or more through holes for the ejector device 50 to pass through these through holes and extend into the groove of the limiting device 40 to act on the forming ejector mechanism 60 .

The forming ejection mechanism 30 can be designed as a stepped structure, wherein the base 301 of the stepped column is slightly larger than the main body 302 of the stepped column, and the base 301 can be designed as a cylindrical column, or as a column of other shapes Body structure, the main body 302 of the stepped structure has a surface that participates in product forming, and the other end of the main body 302 is connected to the base 301 to make it and the base 301 a common whole. In order to facilitate the movement of the forming ejector mechanism 30 in the through hole of the lower mold 20, the cylinder between the forming surface and the base 301 can be designed to have a cross section with a vertical central axis consistent with the projection shape of the forming surface on the base 301 shape cylinder.

The surface of the forming ejection mechanism 30 participating in the forming of the formed product is designed as a complex curved surface with a corresponding appearance. The complex curved surface can be a plane curved surface or a three-dimensional curved surface, and is used to form a corresponding appearance on the surface of the formed product. The patterns formed by the complex curved surface can be landscapes, fruit patterns, animal patterns, character patterns and cartoon patterns, and the specific pattern depends on the designer according to the specific situation.

The molding material M1 is placed on the lower mold 20, or injected into the molding cavity in a certain way.

The upper die 10 moves downward relative to the lower die 20, and partially or completely presses the forming material M1 into the forming cavity, so that the forming material M1 follows the shape set in the forming cavity to form a shaped product that meets the product size specifications, such as a mobile phone back cover etc. The part of the forming material M1 that is in contact with the forming surface of the forming ejector will form a corresponding product appearance on the surface of the formed product M2, such as the company LOGO, according to the shape set on the surface of the forming ejector participating in the forming. as shown in picture 2.

After a certain period of time, the upper mold 10 moves upward relative to the lower mold 20 , and then the forming ejection mechanism 30 moves upward relative to the lower mold 20 under the action of the ejector device 50 , to push the formed product M2 out of the forming cavity. As shown in Figure 3 and Figure 4.

The time for the forming ejection mechanism 30 to move upward relative to the lower die 20 must not be earlier than the time for the upper die 10 to move upward relative to the lower die 20, and the speed of movement cannot be too fast, so as to prevent the two moving parts from interfering during the movement, causing the forming The product M2 is crushed under the joint action of the upper die 10 and the forming ejection structure 30 .

The process of forming a product is completed above. After the shaped product M2 is taken away by a certain method, such as manually or by a robot, the forming ejector mechanism 30 moves downward relative to the lower die 20, and re-forms the forming cavity between the lower die 20 and the upper die 10 at an appropriate time point. Add forming raw material M1 to start a new product processing process.

As shown in FIG. 5 , an appearance view of a forming and ejecting mechanism is provided, which includes a base 301 of the forming and ejecting mechanism and a main body 302 of the forming and ejecting mechanism connected to the base.

The area of the cross-sectional area of the main body 302 of the forming ejection mechanism 30 and the vertical axis of the base 301 may be consistent or not, as shown in FIG. 5 . The area of the cross-section of the vertical axis of the base 301 may be greater than the area of the cross-section of the vertical axis of the main body 302, as shown in FIG.

This example is only a description of the preferred mode of the utility model, and does not limit the scope of the utility model. On this basis, the equivalent transformation of the shape and structure of the utility model should be regarded as within the scope of protection of the utility model.

Claims (9)

1. A mould, comprising: a patrix, a lower die and a forming ejector mechanism, characterized in that the described upper die, lower die and forming ejector mechanism together form a forming cavity, and the forming ejector mechanism Participate in the shaping of the product surface. 2. The mold according to claim 1, wherein the lower mold is provided with a through hole, and the forming ejection mechanism penetrates the lower mold through the through hole and extends into the forming cavity . 3. The mold according to claim 1 or 2, characterized in that the forming and ejecting mechanism is composed of a base and a main body of the forming and ejecting mechanism connected to the base. 4. The mold according to claim 3, wherein the forming ejection mechanism is a column with a stepped structure. 5. The mold according to claim 1 or 2, characterized in that, the surface of the forming ejection mechanism that participates in the shaping of the product surface is a complex curved surface. 6. The mold according to claim 5, wherein the complex curved surface of the forming and ejecting mechanism can be a plane complex curved surface or a three-dimensional complex curved surface. 7. The mold according to claim 1 or 2, characterized in that said mold also has a limiting device. 8. The mold according to claim 7, wherein the limiting device has a groove, and the groove cooperates with the lower mold to form a movement space of the forming ejection mechanism. 9. The mold according to claim 8, characterized in that, the mold also has an upper fixing plate and a lower fixing plate, the upper mold is fixed on the upper fixing plate through the upper surface, and the lower mold and the limiter The position device is connected, and the limit device is fixed on the lower fixing plate.

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