Dewaxing device

Patent metadata

Field	Value
Publication number	US-9387519-B2
Application number	US-201313966257-A
Country	US
Kind code	B2
Filing date	Aug 13, 2013
Priority date	Aug 13, 2013
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

Abstract

A dewaxing device includes a dewaxing system which includes a rinsing device and a storage device connected with the rinsing device via a circulation pipe, and a recycling system which includes a containing trough connected with the storage device and a recycling trough connected between the containing trough and the storage device. The recycling system further includes a rotating device, a condensing unit and a heating unit which cooperate to treat mixed solution with wax into pure chemical solvent in the containing trough. The rotating device is rotatably mounted above the containing trough with the bottom half thereof being dived into the mixed solution. The condensing unit and the heating unit are disposed at two opposite sides of the top half of the rotating device. The rotating device is rotated towards the condensing unit.

First claim

What is claimed is:

1. A dewaxing device of utilizing chemical solvent to dewax a green part of product formed by metal injection molding, comprising:
a dewaxing system for dewaxing the green part of product, the dewaxing system including a rinsing device where the green part of product is placed and a storage device where the chemical solvent is stored, the storage device being connected with the rinsing device via a circulation pipe for utilizing the chemical solvent to soak and rinse the green part of product; and
a recycling system including a containing trough which is connected with the storage device for containing mixed solution with wax from the storage device, and a recycling trough which is connected between the containing trough and the storage device for containing and conveying pure chemical solvent from the containing trough back into the storage device to be reused, the recycling system further including a rotating device, a condensing unit and a heating unit which cooperate to treat the mixed solution with wax into the pure chemical solvent in the containing trough, the rotating device being rotatably mounted above the containing trough with the bottom half thereof being dived into the mixed solution, the condensing unit and the heating unit being disposed at two opposite sides of the top half of the rotating device, the rotating device being rotated towards the condensing unit;
wherein the rotating device includes a hollow shaft and a plurality of blades radially extending outward around outer periphery of the shaft and arranged at regular intervals on generatrices of the shaft, in use, the blades are firstly cooled by the condensing unit to be rotated into the mixed solution for locally cooling the mixed solution to make wax precipitated out of the cooled mixed solution and adhered on the cooled blades, the blades together with the precipitated wax are further rotated out of the mixed solution to be heated by the heating unit for melting the precipitated wax into liquid, then the liquid wax flows into the hollow shaft along the blades by virtue of its own gravity with the upward rotation of the rotating device.

2. The dewaxing device as claimed in claim 1 , wherein free ends of the blades of the rotating device could be further provided with columnar or block metal slices for increasing contact area of the blades with the mixed solution contained in the containing trough.

Assignees

• Cheng Uei Prec Ind Co Ltd

Inventors

• Hsu Che Wei
• Chou Cheng Yu
• Chiang Cheng An
• Cheng Chih Wei

Classifications

• B22F3/003 Primary

  Apparatus, e.g. furnaces (in general F27B) · CPC title

• B22F3/24

  After-treatment of workpieces or articles {(B22F3/1146 takes precedence)} · CPC title

• B08B3/02 Primary

  Cleaning by the force of jets or sprays · CPC title

• B22F3/225

  by injection molding · CPC title

• B22F2003/241

  Chemical after-treatment on the surface · CPC title