Mold sealing method suitable for cold isostatic pressing

Abstract

The invention discloses a mold sealing method suitable for cold isostatic pressing. According to the technical scheme, the mold sealing method is characterized by comprising the steps that according to the size of a permanent mold flange of a mold, a thin steel plate is cut through a platform cutting machine or punching machine, and a thin flange is obtained; bolt holes are drilled in the permanent mold flange and the thin flange, the bolt holes are evenly and densely distributed, and bolts do not interfere with one another in the process of being fastened and installed through the bolt holes;and after powder filling is completed, the open end of a flexible mold is placed between the permanent mold flange and the thin flange, the bolts are tightened, the thin flange can correspondingly deform under the fastening effect of the bolts according to the shape of the end face of the permanent mold flange, so that the thin flange is pressed and attached to the permanent mold flange, and thesealing effect on the mold is better achieved. The mold sealing method suitable for the cold isostatic pressing has the effects that the requirement for machining precision is low, a deformed mold flange can be sealed in a matched mode, and cost is saved.

Description

technical field [0001] The invention relates to the field of mold sealing for cold isostatic pressing, and more specifically relates to a mold sealing method suitable for cold isostatic pressing. Background technique [0002] Most of the devices / molds that use injection molding to form powder materials such as pipeline linings use flanges or flange covers to compress the opening of the soft mold to seal the compression chamber. In the existing technology, in order to ensure the sealing effect of the mold, the method of finishing the flange is mostly used to ensure the flatness of the matching end face of the flange, so as to achieve the effect of effective sealing, which has high requirements for processing accuracy and is difficult to process. In order to ensure that the flange does not deform during installation and use and affect the sealing effect, the strength of the flange is mostly increased by increasing the thickness of the flange, and the deformation resistance of ...

AI Technical Summary

Problems solved by technology

In the existing technology, in order to ensure the sealing effect of the mold, the method of finishing the flange is mostly used to ensure the flatness of the matching end face of the flange, so as to achieve the effect of effective sealing, which has high requirements for processing accuracy and is difficult to process. In order to ensure that the flange does not deform during installation and use and affect the sealing effect, the strength of the flange is mostly increased by increasing the thickness of the flange, and the deformation resistance of the flange is enhanced; however, the flange has been used for a long time or is in use If there is a collision during the process, the end face of the flange will inevitably be deformed and bent, causing a gap in the flange connection and destroying the sealing of the mold. In this case, it is necessary to re-finish the flange or replace it with a new one. ,higher cost

Images