Method for producing a plastic housing

Abstract

The invention relates to a method for producing a plastic housing, in particular a pump housing, which is produced from plastic by means of injection molding by injecting liquid plastic into a mold (110) having at least one mold core (111) and at least one slide (114) that is used to form an undercut. According to the invention, a sealing device (100) is arranged on the outer circumference of the mold core (111) before the insertion of the slide (114) and before the injection step, by means of which sealing device an end face of the slide (114) adjacently facing the mold core (111) and a surface section of the mold core (111) corresponding to said end face are sealed with respect to each other when the slide (114) is in the inserted stop position. The sealing device (100) is designed as a sealing ring and has a projection (102), which is shaped complementary to a groove (112) formed on the mold core (111) in order to fix the sealing device on the mold core (111).

Description

technical field [0001] The invention relates to a method for producing a plastic housing, in particular a pump housing, of the type according to claim 1 . The invention also relates to a device of the type according to claim 6 for carrying out the method. Background technique [0002] Such plastic housings, which are, for example, pump housings, are usually provided within the housing with functional channels which are arranged perpendicularly or obliquely to one another and which serve to receive components made of plastic or metal. In the case of a plastic pump housing, mutually moving shafts are introduced as components in these functional channels, which effectively fulfill the pump function during the intended operation of the assembled pump. Such plastic housings are typically produced by injection molding. [0003] To illustrate in figure 1 shows a typical pump housing 1 made of plastic according to conventional injection molding methods, in which a first chamber 2...

AI Technical Summary

Problems solved by technology

However, this conventional production method has the disadvantage that during the production process the plastic melt introduced as a liquid mold matrix causes abrasion or wear on the smoothed slide surface due to the added and abrasive reinforcing material, which Not only does this result in increased wear of the slide and the resulting maintenance intervals due to its reworking, but also in the corresponding transition regions between the respective directly adjacent housing cavities of the housing produced by this manufacturing process. Burrs are formed such that an additional deburring process step is often required, which is associated with time expenditures that increase costs

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