Method for producing a plastic housing

A plastic shell and plastic technology, applied in the field of pump shells and devices implementing the method, can solve the problems of increasing cost, time consumption, sliding block wear and maintenance intervals, etc.

Inactive Publication Date: 2014-11-12
ROBERT BOSCH GMBH
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing a plastic housing
  • Method for producing a plastic housing
  • Method for producing a plastic housing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Figure 2A A sealing device 100 designed for carrying out the method according to the invention for producing a plastic pump housing is shown, which is designed as a sealing ring and which according to a first embodiment has a closed shape. In a first method step according to the invention, the sealing ring 100 is produced in a casting mold from an injection-moldable polymer, which preferably consists of a perfluoroalkoxy copolymer (PFA). According to an alternative embodiment of the method according to the invention, the sealing ring is produced by extrusion of an elastic semi-finished product.

[0015] Figure 2B A second embodiment of a sealing device 100 according to the invention for carrying out the method according to the invention is shown. Here, the sealing device forming the sealing ring 100 has a radially extending parting slit 101 which traverses the sealing ring 100 in the circumferential direction of the sealing ring and not only allows the sealing ring ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/44B29C33/00
CPCB29C33/0038B29C33/485B29C45/4478B29C33/505
Inventor S·盖泽
Owner ROBERT BOSCH GMBH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap