Method for ensuring the axiality of the injection molding cooling deep borehole and the external-molding surface

Abstract

The invention discloses a manufacture method ensuring the coaxiality between die core cooling deep hole and the external forming surface. The method includes the steps that (1) coarsely cutting the externality: the injection die-core die externality is coarsely cut, and the surface coarseness of the external cylindrical surface of the die core is controlled less than 3.2 microns; (2) drilling the hole of water passage and adjusting the eccentrics: the processing and cooling hole is drilled to ensure that the difference value of the wall thickness of the die-core forming water passage wall thickness is less than or equal to 0.3 mm; (3) heating disposal: the heating disposal is carried out on the conditions of equal-temperature quenching and tempering ranging from 1000 DEG C to 1050 DEG C and the artificial aging disposal ranging from 350 DEG C to 400 DEG C; (4) processing the external cylindrical surface after heating disposal, ensuring that the difference value of the wall thickness of the die-core forming water passage is less than or equal to 0.15 mm; (5) finely processing the externality. In the process to the injection core parts in the injection die of the invention, each working procedure measures and controls the wall thickness, and enables the cooling deep hole to keep consistent with the wall thickness of the external forming surface. The processing method is simple, the cost is low, the adjustment is easy, and the invention is beneficial for the automatic batch production.

Description

technical field [0001] The invention relates to the manufacturing technology of injection bottle moulds, in particular to a manufacturing method for ensuring the coaxiality between the cooling deep hole and the outer molding surface of the injection mould. Process parameters such as machining the outer cylindrical surface and finishing shape ensure the coaxiality between the cooling deep hole of the injection mold and the outer forming surface. Background technique [0002] The two-step blowing method is to inject the preform first, and then heat the preform to blow the bottle. The application of two-step blow molding technology first requires the manufacture of an injection mold, and then uses the mold to injection mold the preform. Injection molds generally have multiple cavities in one mold. As the number of cavities increases, how to ensure the quality consistency of each preform is a key issue to be considered in the design and manufacture of injection molds. The qual...

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Problems solved by technology

[0003] The current mold core structure is processed by ordinary lathe, but because the wall thickness is not strictly measured and controlled in each process during the processing process, and the written process does not fully consider the uniformity of the wall thickness, this processing method makes the cooling depth The wall thickness of the hole and the outer molding surface is inconsistent, resulting in uneven cooling of the preform when the injection mold is injecting the preform, and the error of the wall thickness of the preform is too large, and it is easy to cause deformation of the preform

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