Ceramic injection molding die

Abstract

The utility model provides a ceramic injection molding die, which comprises an upper die and a lower die which are matched with each other, the upper die comprises a movable die, the lower die comprises a fixed die, a cavity is arranged between the movable die and the fixed die, the cavity is connected with a feed port through a runner, the side part of the cavity is also connected with an exhaust groove, and the exhaust groove is communicated with the upper die and the lower die. And one end of the exhaust groove is connected with a vacuum pump outside the mold. The mold has the beneficial effects that the mold is combined with the vacuum pump, and negative pressure is formed in the cavity by pumping out residual air in the cavity. And the blocking of gas in the runner is reduced, so that the raw materials can be quickly filled into the cavity, the forming speed is accelerated, meanwhile, bubbles on a final product can be reduced, and the yield of the product is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of die forming, and particularly relates to a ceramic injection molding die. Background Art

[0002] The ceramic injection molding process is a modern, efficient and precise manufacturing technology. Its basic principle is to inject the molten ceramic material into the mold by means of high-pressure injection and form the product under high temperature and high pressure. This process is widely used in the manufacture of precision ceramic products such as porcelain teeth and ceramic cutters. Compared with the traditional manufacturing process, the ceramic injection molding process has higher production efficiency and can mass-produce products meeting the standards. However, it is found in actual applications that due to the influence of the air pressure in the injection mold, the products produced by the existing ceramic injection molds will have bubbles or other defects, resulting in a low yield rate. Content of the Utility Model

[0003] In order to overcome the defects of the prior art, the utility model provides a ceramic injection molding die, which can reduce the obstruction of gas to the runner, reduce the generation of bubbles on the product, and improve the yield rate.

[0004] The purpose of the utility model is realized by the following technical solutions:

[0005] A ceramic injection molding die includes a cooperating upper die and a lower die. The upper die includes a moving die, and the lower die includes a fixed die. A cavity is arranged between the moving die and the fixed die. The cavity is connected to a feed port through a runner, and an exhaust groove is also connected to the side of the cavity. One end of the exhaust groove is connected to a vacuum pump outside the mold.

[0006] Preferably, the runner is arranged in the middle of the moving die and the fixed die, and the cavity is placed on both sides of the runner.

[0007] Preferably, a plurality of exhaust grooves are arranged. The ends of the exhaust grooves are connected to exhaust holes, and the exhaust holes are connected to an external vacuum pump.

[0008] Preferably, the cavities are symmetrically arranged on both sides of the runner, and at least two cavities are arranged on each side to form a group.

[0009] Preferably, a shared exhaust groove is connected between the cavities on the same side.

[0010] The beneficial effect of the utility model is reflected in that the utility model combines a vacuum pump. By extracting the residual air in the cavity, a negative pressure is formed in the cavity. The obstruction of gas in the runner is reduced, so that the raw material can quickly fill the cavity, the molding speed is accelerated, and at the same time, the bubbles on the final product can also be reduced, and the yield rate of the product is improved. Description of the Drawings

[0011] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 : Structural schematic diagram of the present utility model.

[0013] Figure 2 : Structural schematic diagram of the fixed mold of the present utility model.

[0014] Figure 3 : The present utility model Figure 2 Schematic diagram of the back structure. Detailed implementation manners

[0015] In order to make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the following will further elaborate on the present utility model in combination with the attached Figures 1 - 3 drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0016] The present utility model proposes a ceramic injection molding die, which, like the prior art, includes a matching upper die and a lower die. The upper die includes a moving die 11, and the lower die includes a fixed die 12. After mold closing, a cavity 3 is arranged between the moving die 11 and the fixed die 12. One end of the cavity 3 is provided with a feed port 4, and the feed port 4 is connected to an injection port 13 through a runner 1. During molding, the molten ceramic raw material will enter the runner 1 through the injection port and then enter the cavity through the feed port 4 for molding. The specific demolding process and the like are the same as those of the prior art and are not the focus of the present utility model, so they will not be elaborated here.

[0017] Different from the prior art, an exhaust groove 6 is connected to the side of the cavity 3. The arrangement of the exhaust groove 6 can assist in discharging the gas in the runner during molding. In order to better form a negative pressure state in the cavity and reduce the obstruction of the gas to the runner, further, one end of the exhaust groove 6 is connected to a vacuum pump outside the mold through an interface 7. The exhaust groove 6 is connected to the vacuum pump through an exhaust port 5. Since the cavity is in a negative pressure state, that is, the material can quickly fill the cavity, and at the same time, the generation of product bubbles can be reduced, improving the yield. The vacuum pump can adjust the vacuum time and vacuum degree as needed, with high flexibility and freedom.

[0018] In this embodiment, the runner 1 is arranged at the middle position between the moving mold and the fixed mold, and the cavities 3 are symmetrically arranged on both sides of the runner 1. Two cavities 3 are arranged on each side to form a group. The cavities 3 on the same side are connected by a shared exhaust groove 6. In order to improve the exhaust efficiency, a plurality of exhaust grooves 6 are provided. The end of the outer exhaust groove 6 is connected to the exhaust hole 5, and the exhaust hole 5 is connected to an external vacuum pump.

[0019] Finally, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] Moreover, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A ceramic injection molding die, characterized in that: It includes an upper mold and a lower mold that cooperate with each other, the upper mold includes a movable mold, the lower mold includes a fixed mold, a cavity is arranged between the movable mold and the fixed mold, the cavity is connected to a feed port through a runner, and an exhaust groove is also connected to the side of the cavity, and one end of the exhaust groove is connected to a vacuum pump outside the mold.

2. A ceramic injection molding die as claimed in claim 1, characterized in that: The flow channel is arranged in the middle of the movable mold and the fixed mold, and the mold cavity is arranged on both sides of the flow channel.

3. A ceramic injection molding die as claimed in claim 2, characterized in that: A plurality of exhaust grooves are provided, and the ends of the exhaust grooves are connected to exhaust holes, and the exhaust holes are connected to an external vacuum pump.

4. A ceramic injection molding die as claimed in claim 3, characterized in that: The cavities are symmetrically arranged on both sides of the flow channel, and at least two cavities are arranged on each side to form a group.

5. A ceramic injection molding die as claimed in claim 4, characterized in that: The cavities on the same side are connected with a shared exhaust groove.

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