Plastic barrel and method for manufacturing plastic member of plastic barrel
A technology of plastic barrels, plastics, applied in the field of injection molding for the manufacture of such plastic components, which can solve problems such as limited applicability, inability to apply bearing retainers, and insufficient space for geometric shapes
Active Publication Date: 2016-05-18
BOSCH SIEMENS HAUSGERATE GMBH
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- Application Information
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Problems solved by technology
It is also disadvantageous that a higher level of tension is generated in the area of the tab, which always results in a greater growth of the material
[0012] The applicability of the above-mentioned manufacturing method is limited, since this solution cannot be applied in the area of the bearing holder, also called raised, because the introduction of the variation of the geometry mentioned in the above-mentioned patent application is not sufficient space available
Furthermore, this geometric change cannot preclude the formation of crossed, approximately straight joint lines in the material
Method used
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Embodiment Construction
[0033] figure 1 A sectional view through the drum axis 6 at right angles to the tub side wall produced in one piece using the injection molding method is shown. The embodiment shown in this figure comprises a rear wall 10 of the tub with a bearing holder 1 for the drum shaft, a transition area 5 to the cylindrical tub shell, for engaging and threading the tub shell The retainer 12 and the molded reinforcing rib 9. The thickness of the side walls 10 as well as the height of the reinforcing ribs 9 decrease from the bearing holder 1 to the tub shell for strength reasons. The tub side wall 10 has three joint lines 2 extending radially outward from the bearing holder 1 to the edge in a straight line. Bonding wires 2 are shown in dashed lines in all figures.
[0034] figure 2 A top view of the tub side wall 10 is shown. In this view, the buckets provided here are no different than those of prior embodiments. Special features of the bondline 2 that characterizes the barrel can...
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The invention relates in particular to a plastic suds container, which due to the manufacturing process has joint lines, which are produced in particular during injection molding by means of a plurality of gates. The component according to the invention is characterized by elongated joint lines, the shapes of which have been changed. Perpendicularly with respect to the extension thereof, the intersection lines of the joint lines have deformations which are bell-shaped or are broken up in some areas. Components of said type have increased strength in the region of the joint line. The danger of cracks forming in the region of the joint lines is minimised. In the method for producing such a component, the delivery of plastic material via at least one of the gates present in the injection mould briefly takes place at reduced pressure or is briefly interrupted. The control is done via valves in the feed lines to the injection mould. The time frame for the control is determined by means of simulation or empirically. The existing equipment and tools can be used for the method, and no additional investments are necessary.
Description
technical field [0001] The invention relates to a plastic tub, a method for producing a plastic component with a joint line for a plastic tub for a washing machine or a washer / dryer, and an injection molding method for producing such a plastic component, wherein , in the injection molding process, the molten plastic is introduced into the injection molding mold by means of a plurality of spatially distributed inlets. Background technique [0002] The invention is applicable to plastic buckets and their manufacture, which are subjected to high levels of stress when used as intended. Tubs for washing machines that have a loading opening at the front with a so-called front loading site are components that are subjected to such high levels of stress. The side wall of such a tub has a bearing holder made of metal provided at the center, in which a shaft or a rotating pin of the laundry drum engages, is supported on one side and is arranged approximately horizontally. During the...
Claims
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IPC IPC(8): B29C45/00D06F37/26
CPCD06F37/262B29C45/0025B29C45/0046D06F37/264D06F37/269
Inventor A·扎巴蒂尔C·匡特H·赖克内尔C·特恩-沃德格尔
Owner BOSCH SIEMENS HAUSGERATE GMBH