Injection molding mold for ceramic parts and injection molding method thereof

Abstract

The invention is suitable for the technical field of molds, and discloses a ceramic part injection molding mold and an injection molding method thereof. The mold comprises an upper mold set and a lower mold set, the upper mold set comprises an inclined guide column, a shovel machine and a female mold core, the lower mold set comprises a sliding block assembly and a male mold core which are arranged in sequence from top to bottom, the sliding block assembly is matched with the inclined guide column and the shovel machine to move, and the female mold core abuts against the male mold core during mold assembling; the sliding block assembly comprises a sliding block with one end abutting against the shovel machine and a sliding block spring arranged between the sliding block and the male mold core, and the inclined guide column penetrates the sliding block and is used for driving the sliding block to move in the direction perpendicular to an opening mold; and the sliding block, the female mold core and the male mold core form a water inlet during mold assembling, and the water inlet is located below a mold cavity and used for injecting ceramic melt. According to the ceramic part injection molding mold and the injection molding method, glue feeding through a submarine gate is achieved, the appearance of a part is prevented from being influenced by a glue inlet, marks of a glue opening do not exist on the appearance face of the obtained part, and the requirement of clients for the appearance of a product is met.

Description

technical field [0001] The invention belongs to the technical field of moulds, in particular to an injection molding mold for ceramic parts and an injection molding method thereof. Background technique [0002] The ceramic injection mold is the main tooling equipment for the mass production of ceramic parts, and the plastic feeding structure of the mold determines the appearance quality of the ceramic parts. At present, the glue feeding structure of ceramic injection molds mainly includes four categories: direct glue feeding, side gate, spot feeding and submerged glue. [0003] Among them, such as figure 1 As shown, the advantages of direct glue feeding are: large cross-sectional area of ​​glue inlet, small flow resistance, which is conducive to material and pressure transmission, and is suitable for large-scale and thick-walled molding, but it has the following disadvantages: large nozzle size, removal of nozzle After the residual trace is large, it is easy to affect the ...

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Problems solved by technology

[0003] Among them, such as figure 1 As shown, the advantages of direct glue feeding are: large cross-sectional area of ​​glue inlet, small flow resistance, which is conducive to material and pressure transmission, and is suitable for large-scale and thick-walled molding, but it has the following disadvantages: large nozzle size, removal of nozzle The residual traces are large, which is easy to affect the appearance and function of the product

like figure 2 As shown, the advantages of the side gate are: convenient and simple processing, easy to repair, and suitable for the molding of long-process and thick-walled products, but it has the following disadvantages: the side gate is located on the edge of the workpiece, and there are large traces after removing the gate, which is easy to repair. The appearance and function of the product are affected

like image 3 As shown, the advantages of spot injection are: the cross-sectional area of ​​the spot gate is small, and there is no need to cut the nozzle twice. It is suitable for materials with good fluidity, but it has the following disadvantages: long runner path, large pressure loss, easy to product The appearance is affected and the structure is complicated and the cost is high

like Figure 4 As shown, the advantages of submerged glue are: the submerged gate has a small cross-sectional area, does not need to cut the nozzle twice, and can avoid the gate trace caused by the gate design on the appearance surface of the product, which is very practical for the high appearance of the product. However, it has the following disadvantages: when this type of gate is demolded, it must be forced out of the nozzle, and the gate is forcibly pushed out by the thimble to cut off the gate. Excessive pushing force may cause the nozzle to break in the mold. This type of glue feeding method Only suitable for plastic products with good toughness, not for ceramic products

[0005] Due to the high "brittleness" of ceramic materials and easy breakage, the current ceramic molds can only adopt direct glue injection, side gate and spot glue injection. These three glue injection methods will definitely affect the appearance of ceramic parts and are difficult to meet It is required by the customer, and it takes a lot of time to correct the residual glue inlet on the appearance of the part

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