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Shell making method for impeller wax molds for hydraulic retarder of heavy vehicle

A technology of hydraulic retarder and truck, applied in the direction of hydraulic resistance brakes, manufacturing tools, brake types, etc., can solve the problems of unstable shell, affecting the smooth progress of baking, shell fragmentation, etc., to avoid the shell Fragmentation, assuring firmness, and shell-stabilizing effect

Inactive Publication Date: 2017-06-13
JIANGSU TANGCHEN AUTOMOBILE PARTS
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, the shells produced by the current general shell making process are not stable, and the shells are prone to cracking during transportation or roasting, which affects the smooth progress of roasting.

Method used

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Examples

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Embodiment Construction

[0015] The following embodiments may enable those skilled in the art to fully understand the present invention, but they do not limit the present invention to the scope of the described embodiments.

[0016] The wax moulding shell method of the truck hydraulic retarder impeller of the present invention is realized by sequentially processing the surface layer, the transition layer and the reinforcement layer on the surface of the wax model module after the tree assembly. The specific manufacturing method is as follows:

[0017] The first step is to make the surface layer: First, make sure that the temperature of the working environment is 24±2℃ and the relative humidity is 60-70%. Then, add distilled water with a quantitative silica sol in the proportion of 20% and pour it into the mixing tank. Then add 0.05% penetrant and 320 mesh zirconium powder to the mixing tank, and stir. The mixing time is more than four hours to form a surface layer coating. Then the wax mold module is slowly...

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PUM

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Abstract

The invention relates to a shell making method for impeller wax molds for a hydraulic retarder of a heavy vehicle. The shell making method is implemented by sequentially processing a surface layer, a transition layer and a reinforcement layer on the surface of a wax mold module assembled by the wax molds. The shell making method has the advantages as follows: a shell is steadier and firmer by adding the surface layer, the transition layer and the reinforcement layer on the surface of the wax mold module, the shell cracking phenomenon is avoided, and smooth roasting is ensured.

Description

Technical field [0001] The invention relates to the field of automobile parts processing, in particular to a wax moulding shell method for the impeller of a hydraulic retarder of a truck. Background technique [0002] Hydraulic retarder is also called hydraulic speed resistance device. When the car uses pneumatic or hydraulic braking when going down a long steep slope, although it can achieve a good braking effect, for a heavy vehicle with a load of more than nine meters, the use of pneumatic or hydraulic braking cannot be fully guaranteed. In addition, frequent braking of the brake assembly under heavy load conditions is prone to lock and decay. Therefore, the state stipulates that heavy-duty passenger cars over 9 meters and heavy-duty trucks over 12 meters must be equipped with retarder auxiliary braking devices. The stator of the hydraulic retarder is a retarder shell, which is connected with the rear end of the transmission or the frame, the rotor is connected with the tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C7/02B22C9/04B22C9/28B22D25/02B22C3/00F16D57/00
CPCB22C7/02B22C3/00B22C9/04B22C9/28B22D25/02F16D57/005F16D2250/0007
Inventor 吴华锋宋智能卢坤林陈健
Owner JIANGSU TANGCHEN AUTOMOBILE PARTS
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