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Forming process for refrigerator air duct cover plate

A technology of air duct cover and molding process, which is applied to household components, household appliances, other household appliances, etc., can solve the problems of single structure of air duct cover and no waterproof function, and achieves good waterproof effect and novel molding process. , to meet the effect of large-scale applications

Inactive Publication Date: 2016-11-09
QINGDAO HAIBAILI MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems in the prior art that the air duct cover plate has a single structure and no waterproof function, the purpose of the present invention is to provide a molding process for the refrigerator air duct cover plate

Method used

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Effect test

Embodiment Construction

[0021] The molding process of the refrigerator air duct cover plate specifically includes the following steps:

[0022] (1) Prepare the cover plate model: set up two corresponding upper molds and lower molds. Both the upper mold and the lower mold are set in a hollow H-shaped structure. The H-shaped beam of the upper mold is set in a concave spherical structure. The upper mold There is a certain distance directly from the lower mold, and the top pressure and tensile force are set in advance according to the profile of the cover plate, and the profile is continuously pressed into the mold to cause plastic deformation; it is prepared by the upper mold and the lower mold with a hollow H-shaped structure The protruding H-shaped cover profile in the middle avoids defects in appearance and bonding strength caused by the welding process;

[0023] (2) Stretch bending: fix the cover plate prepared in step (1) on the stretch bending machine, set the stretch bending mold as a P-shaped ar...

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PUM

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Abstract

The invention discloses a forming process for a refrigerator air duct cover plate. The forming process for the refrigerator air duct cover plate comprises the following steps of (1) preparing a cover plate model: both an upper mould and a lower mould are set as hollow H-shaped structures and made to produce plastic-deformed H-shaped cover plate profiles; (2) carrying out stretch bending: a stretch bending mould is set as a P-shaped arc forming mould, and the tail of the cover plate rotates through 80 degree to form an arc cover plate; (3) adding a waterproof boss: the waterproof boss is extruded into a Z-shaped boss; (4) carrying out assembling with a volute; and (5) carrying out punching: the punching operation forms a fixed hole. The molding and forming process for the cover plate profiles is novel and realizes the effect of fast air guiding and keeps the cover plate dry. The prepared arc H-shaped cover plate surface is good in quality without the defects, such as corrugation and deformation, has the effects of saving materials, saving energy and being efficient and good in waterproofness. Due to the fact that the bend amount of stretch bending is 21-25 degree and the intensity of the top pressure applied is 31-35 MPA, the assembly quality of the prepared arc H-shaped cover plate is guaranteed and the prepared arc H-shaped cover plate is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of refrigerator air duct cover plates, and in particular relates to a molding process of refrigerator air duct cover plates. Background technique [0002] The air supply duct of a conventional air-cooled refrigerator has a relatively complicated structure. The cost of mold making and the cost of molded parts are relatively high, and in order to fix the air duct on the refrigerator liner, at least there is a bayonet or screw fit with the refrigerator liner, and the assembly process is relatively complicated. In addition, in order to prevent deformation of the injection-molded air supply duct, reinforcing ribs need to be provided at various places in the air supply duct. Moreover, in the prior art, when the volute assembly is assembled with the cover plate, the large end face of the cover plate is first pressed with tooling, and the cover plate is screwed into the volute, and the large end face of the cover p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/00B29C33/42B29C53/04B29C65/72B29L31/00
CPCB29C69/00B29C33/42B29C53/04B29C65/72B29L2031/7622
Inventor 孙涛
Owner QINGDAO HAIBAILI MACHINERY
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