Quick self-demolding die-casting die

Abstract

A rapid self-demolding die-casting die comprises an upper die and a lower die, an impression plate and an ejection piece are sequentially arranged between the upper die and the lower die, a first die cavity is formed in the face, facing the impression plate, of the upper die, a second die cavity is formed in the face, facing the upper die, of the impression plate, and the first die cavity and the second die cavity are correspondingly closed to form a whole die-casting die cavity; and an ejection piece is arranged below the printing template, extends into the second mold cavity from the lower part of the printing template in a telescopic manner, is pressed by the mold closing pressure to completely retreat from the second mold cavity, and is ejected out of the second mold cavity of the printing template in a self-resetting manner without being pressed. According to the die, the problems that a die-casting die is adhered in a die cavity after being formed, is inconvenient to demould and needs to be pried out manually by a tool can be solved, the working efficiency of a die-casting product is improved, the probability that the product is damaged after being demoulded is reduced, the appearance of the product is kept complete, the surface form of the product is not damaged, and meanwhile, the demoulding efficiency is improved.

Description

[Technical field]

[0002] The utility model relates to the technical field of jewelry processing, in particular to a die-casting mold device used for die-casting metal jewelry. [Background technology]

[0004] In the traditional precious metal jewelry processing industry, the most traditional processing method is usually metal smelting. Clean water is first melted manually through high-temperature smelting, and then the mold with the shape to be cast is heated. The molten metal liquid is poured into the mold while it is hot. After cooling and forming, it is taken out to obtain the molded jewelry. A certain degree of polishing may be required later to obtain the best appearance of the jewelry product.

[0005] If the jewelry is three-dimensional, the biggest problem with casting is demoulding. Some products are made of closed molds made of gypsum, with only a tiny pouring port. After cooling and molding, the mold is destroyed to obtain the molded product. This method is rarely used now. The process is simple and the finished product is rough and does not meet the aesthetic taste of consumers. In addition, the process is cumbersome and demoulding is difficult. It is highly dependent on manual labor, which is inefficient and does not meet the economic benefits.

[0006] At present, there are also precious metal jewelry products that are generally in the form of flakes that are die-casted using molds. Generally, the upper mold and the lower mold are combined to squeeze the internal liquid metal, allowing it to fill the inside of the busy mold, and then the mold is opened to obtain the molded product after cooling and shaping. For example, patent CN210450852U discloses a material-saving jewelry casting mold, whose structure includes an upper mold base and a lower mold base that are distributed up and down and fit each other, and an upper mold cavity and a lower mold cavity are opened inside the upper mold base and the lower mold base. The biggest problem of this mold is that a lot of pressure needs to be applied to the mold during the die-casting process. The liquid metal is squeezed and pressed tightly in the mold cavity of the mold under pressure to form a product that meets the QC standard without holes. Therefore, it will expand and be tightly adsorbed in the mold cavity under pressure, sticking and not easy to demold. It needs to be manually pried or picked out after cooling and shaping, which will affect the surface and product shape of the product and have uncertain factors. At the same time, in order to reduce losses, it will also greatly reduce work efficiency, so it is urgent to improve the die-casting mold to facilitate demolding. [Summary of the invention]

[0008] In view of the above problems, the utility model proposes a quick self-demolding die-casting mold, which can overcome the problem that the die-casting mold adheres to the mold cavity after molding, is inconvenient to demold, and needs to be pried out manually using tools. The working efficiency of the die-casting product is improved, the probability of product demolding damage is reduced, the product appearance is kept intact, the surface morphology will not be damaged, and the demolding efficiency is improved.

[0009] The utility model relates to a fast self-demolding die-casting mold group, comprising an upper mold and a lower mold, and is characterized in that a stamping plate and an ejector are arranged in sequence between the upper mold and the lower mold, wherein a first mold cavity is arranged on a side of the upper mold facing the stamping plate, and a second mold cavity is arranged on a side of the stamping plate facing the upper mold, and the first mold cavity and the second mold cavity correspond to the mold closing to form an integral die-casting mold cavity; an ejector is arranged below the stamping plate, and the ejector can be telescopically extended from below the stamping plate into the second mold cavity, and the ejector is pressed down by the mold closing pressure to completely withdraw from the second mold cavity, and self-resets to eject the second mold cavity of the stamping plate when not under pressure.

[0010] An ejector hole is arranged at the bottom of the second mold cavity of the printing plate. The ejector comprises an ejector rod and a spring. The ejector rod compression spring is placed in the ejector hole.

[0011] An ejector hole penetrating the printing plate is provided at the bottom of the second mold cavity of the printing plate. The ejector comprises an ejector rod, a spring and an ejector plate. The ejector plate is connected to the ejector rod at the top and a compression spring is provided at the bottom. The ejector plate extends into the second mold cavity by inserting its ejector rod through the ejector hole.

[0012] A leak-proof sealing ring is provided between the ejector rod of the ejector and the ejector hole.

[0013] The lower die is provided with a built-in sunken groove inside, and the ejector plate presses the compression spring and is placed in the built-in sunken groove inside the lower die.

[0014] A guide slide mechanism is arranged between the upper die and the printing die plate.

[0015] The guide slide mechanism comprises a positioning guide slide column arranged between the upper mold and the printing plate, or a guide slide sleeve arranged on the periphery of the upper mold and the printing plate.

[0016] The number of the positioning guide slide columns is 2 to 4 and they are evenly distributed on the surface of the upper mold facing the printing plate, and corresponding positioning holes are provided on the printing plate.

[0017] The mold involved in the utility model can overcome the problem that the die-casting mold adheres to the mold cavity after molding, which is inconvenient to demold and needs to be pried out manually using tools, thereby improving the working efficiency of the die-casting product and reducing the probability of product demolding damage, keeping the product appearance intact, and preventing the surface morphology from being damaged, while improving the demolding efficiency.

Brief Description of the Drawings

[0019] Figure 1 This is a split top view of a quick self-demolding die-casting mold involved in the utility model;

[0020] Figure 2 This is a split bottom view of a quick self-demolding die-casting mold involved in the utility model;

[0021] Among them: 10, upper mold; 11, first mold cavity; 12, positioning guide slide; 20, printing plate; 21, second mold cavity; 22, ejector hole; 23, positioning hole; 30, ejector; 31, ejector rod; 32, spring; 33, ejector plate; 40, lower mold; 41, built-in sunken groove. [Specific implementation method]

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] Please refer to the attached Figure 1 and attached Figure 2 A fast self-demolding die-casting mold assembly, comprising an upper mold 10 and a lower mold 40, characterized in that a stamping plate 20 and an ejector 30 are sequentially arranged between the upper mold 10 and the lower mold 40, wherein the upper mold 10 has a first mold cavity 11 on the side facing the stamping plate 20, and the stamping plate 20 has a second mold cavity 21 on the side facing the upper mold 10, and the first mold cavity 11 and the second mold cavity 21 correspond to each other to form a die-casting mold cavity as a whole; this die-casting mold cavity as a whole is the cavity space for injecting liquid metal to die-cast a product, and the shape of the cavity space here is the shape of the product after molding.

[0026] An ejector 30 is provided below the printing plate 20. The ejector 30 can be movably extended from the bottom of the printing plate 20 into the second mold cavity 21. The ejector 30 is pressed down by the mold clamping pressure to completely withdraw from the second mold cavity 21, and self-resets to eject the second mold cavity 21 of the printing plate 20 when not under pressure. The ejector 30 is a key component for realizing rapid self-demolding. When pressed down by the pressure of the upper mold 10, the ejector 30 completely withdraws from the second mold cavity 21 without affecting the molding shape of the product. Once the pressure is released and the pressure on the upper mold 10 is relaxed, the ejector 30 has the potential energy of automatic reset, and is ejected synchronously with the lifting of the upper mold 10. At the moment of pressure release, the ejector is ejected by elastic force, and there is an instantaneous impulse to quickly, efficiently and completely demold the product.

[0027] There are two different implementations of the ejector, one of which is that an ejector hole 22 is provided at the bottom of the second cavity 21 of the stamp plate 20, and the ejector 30 includes an ejector rod 31 and a spring 32, and the ejector rod 31 compresses the spring 32 and is inserted into the ejector hole 22. That is, the ejector rod is built into the ejector hole 22 of the stamp plate 20, and the ejector hole 22 is a non-penetrating slot, and the ejector rod 31 compresses the spring 32 and both are inserted into the ejector hole 22.

[0028] Second: the ejector includes an ejector rod 31, a spring 32 and an ejector plate 33. Structurally, the spring 32 is arranged below the ejector plate 33, the ejector rod 31 is arranged above the ejector plate 33, and the ejector 30 is arranged as a whole below the printing plate 20. The ejector hole 22 is a hole that passes through the printing plate 20. The ejector 30 extends into the second mold cavity 21 from the bottom of the printing plate 20 with its ejector rod 31 inserted into the ejector hole 22.

[0029] At this time, a built-in sunken groove 41 is provided inside the lower die 40 , and the ejector plate 33 presses the compression spring and is placed in the built-in sunken groove 41 inside the lower die 40 .

[0030] In order to prevent leakage of molten metal liquid, a leak-proof sealing ring (not shown) is provided between the ejector rod 31 of the ejector 30 and the ejector hole 22 .

[0031] A guide slide mechanism is provided between the upper die and the printing die plate. The guide slide mechanism also includes two different forms, one is an inner guide slide and the other is an outer guide slide. Please refer to the attached Figure 1 The form of internal guide slide is shown therein, and the guide slide mechanism includes a positioning guide slide column 12 arranged between the upper mold 10 and the printing plate 20. The positioning guide slide column 12 includes 2 to 4 columns. In this embodiment, two positioning guide slide columns 12 are illustrated, which are evenly distributed on the surface of the upper mold 10 facing the printing plate 20, and corresponding positioning holes 23 are provided on the printing plate 20.

[0032] The external guide sliding is in the form of a guide sliding sleeve disposed on the periphery of the upper mold 10 and the printing plate 20, and the upper mold 10 slides up and down in the guide sliding sleeve to complete the process of mold closing, die casting and pressure relief and mold opening.

[0033] The mold involved in the utility model can overcome the problem that the die-casting mold adheres to the mold cavity after molding, which is inconvenient to demold and needs to be pried out manually using tools, thereby improving the working efficiency of the die-casting product and reducing the probability of product demolding damage, keeping the product appearance intact, and preventing the surface morphology from being damaged, while improving the demolding efficiency.

[0034] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A rapid self-demolding die-casting mold, comprising an upper mold and a lower mold, characterized in that: A stamping plate and an ejector are arranged in sequence between the upper die and the lower die, wherein a first cavity is arranged on a side of the upper die facing the stamping plate, and a second cavity is arranged on a side of the stamping plate facing the upper die, and the first cavity and the second cavity correspond to each other to form an integral die-casting cavity; an ejector is arranged below the stamping plate, and the ejector can be telescopically extended from below the stamping plate into the second cavity, and the ejector is pressed down by the closing mold pressure to completely withdraw from the second cavity, and self-resets to eject the second cavity of the stamping plate without being under pressure.

2. The rapid self-demolding die-casting mold according to claim 1, characterized in that: An ejector hole is arranged at the bottom of the second mold cavity of the printing plate. The ejector comprises an ejector rod and a spring. The ejector rod compression spring is placed in the ejector hole.

3. The rapid self-demolding die-casting mold according to claim 1, characterized in that: An ejector hole penetrating the printing plate is provided at the bottom of the second mold cavity of the printing plate. The ejector comprises an ejector rod, a spring and an ejector plate. The ejector plate is connected to the ejector rod at the top and a compression spring is provided at the bottom. The ejector plate extends into the second mold cavity by inserting its ejector rod through the ejector hole.

4. The rapid self-demolding die-casting mold according to claim 2 or 3, characterized in that: A leak-proof sealing ring is provided between the ejector rod of the ejector and the ejector hole.

5. The rapid self-demolding die casting mold according to claim 3, characterized in that: The lower die is provided with a built-in sunken groove inside, and the ejector plate presses the compression spring and is placed in the built-in sunken groove inside the lower die.

6. The rapid self-demolding die casting mold according to claim 5, characterized in that: A guide slide mechanism is arranged between the upper die and the printing die plate.

7. The rapid self-demolding die casting mold according to claim 6, characterized in that: The guide slide mechanism comprises a positioning guide slide column arranged between the upper mold and the printing plate, or a guide slide sleeve arranged on the periphery of the upper mold and the printing plate.

8. The rapid self-demolding die-casting mold according to claim 7, characterized in that: The number of the positioning guide slide pillars is 2 to 4 and they are evenly distributed on the surface of the upper mold facing the printing plate, and corresponding positioning holes are provided on the printing plate.

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