Method for processing submarine gate with forming knife

Abstract

The invention relates to a method for processing a submarine gate with a forming knife, which comprises the following steps of: measuring the cross section diameter of a certain part in the range of 2mm to 4mm above the bottom of an inlet gate; choosing a drill according to the measured cross section diameter; putting an inlay member on a milling machine table, wherein the inlet direction of the inlay member is vertical to the milling machine table; finding the coordinates of an X-axis and a Z-axis of the inlet gate, wherein the inlet gate is roughly processed by using a drill, and is processed to a position which is 0.4mm to 0.6mm above the bottom of the inlet gate; and changing the drill for the forming knife to precisely process the inlay member until a required value is reached. The method for processing a submarine gate with a forming knife can be used for rapidly processing the submarine gate, meanwhile, processing precision can be ensured.

Description

technical field [0001] The invention relates to a processing method for a latent gate, in particular to a method for processing a latent gate by a forming knife. Background technique [0002] Latent gate, also known as tunnel gate, is evolved from point gate. It not only overcomes the shortcomings of point gate mold complexity, but also maintains the advantages of point gate. The latent gate can be set on the side of the movable mold or on the side of the fixed mold. It can be placed on the inner surface or hidden side of the plastic part, it can also be placed on the ribs and columns of the plastic part, and it can also be placed on the parting surface. It is also a simple and easy way to use the ejector rod of the mold to set the gate. The latent gate is generally three-dimensional, and forms a certain angle with the cavity, usually 20°-45°, and the gate size can be selected according to the point gate size. [0003] The advantages of latent gates are as follows: (1) Th...

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Problems solved by technology

(2) After the product is formed, it will be automatically broken with the plastic part when it is ejected

Its disadvantages are as follows: (1) Since the latent gate sneaks under the parting surface and enters the cavity along an oblique direction, it is difficult to process

(2) Since the shape of the gate is a cone, it is easy to cut off when ejecting, so the diameter should be relatively small, but when dealing with thin-walled products, it is not suitable because the pressure loss is too large and it is easy to condense.

[0004] At present, the latent gate is usually processed by forming drill, but the processing speed of forming drill is relatively fast, but its precision is not high, and it is impossible to realize those latent gates that require high precision.

In order to improve the machining accuracy, EDM is also used for machining. Although EDM can improve the machining accuracy, its speed is greatly slowed down.

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