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Method for precisely casting top cover of mincing machine

A meat grinder top cover and precision casting technology, which is applied to casting molding equipment, casting molds, casting mold components, etc., can solve the problems of low product qualification rate and many defects, and achieve good mechanical properties, few defects, and precise control Effect

Inactive Publication Date: 2014-04-09
沭阳华瑞金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem that the existing technology cannot process the top cover of the meat grinder with a hole spacing of less than 5mm, the qualified rate of processed products is low and there are many defects, the present invention provides a precision casting method for the top cover of the meat grinder, and the hole spacing The top cover of the meat grinder is less than 5mm, and the expansion coefficient of the formwork is the same as that of the material used

Method used

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  • Method for precisely casting top cover of mincing machine

Examples

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Comparison scheme
Effect test

Embodiment 1

[0044] processed as figure 1 Shown workpiece, a kind of precision casting method of meat grinder top cover, its steps are:

[0045] (1) Making metal molds: Design and make metal molds according to the structure of the top cover of the meat grinder, and reserve gates and vent holes when making molds;

[0046] (2) To make a wax model, use a wax injection machine to inject wax into the metal mold in step (1). When injecting wax, keep the ambient temperature at 30°C, the injection pressure at 0.21MPa, the wax temperature at 62±2°C, and the nozzle temperature at 62°C. ±2°C; the composition of the wax is mixed according to the mass ratio: 62% paraffin wax + 35% stearic acid + 4% myristic acid. Stir at 70±2°C for 3 hours before use. This composition is The key to ensure fewer wax mold defects, the processed wax mold has uniform performance distribution, high density, and will not fall off;

[0047] (3) Wax model inspection and repair: remove burrs, drape and parting lines, and if t...

Embodiment 2

[0066] Same as Example 1, the difference is that in step (2) when injecting wax, keep the ambient temperature at 24°C, and the injection pressure is 0.3MPa; the wax is stirred at 70±2°C for 2-5h before use; step (4 ) in step A surface layer: the air humidity in this step is 50%, the drying time in step ③ is 7 hours, and the zircon sand used is 115 mesh zirconia powder; the air humidity in step B is 70% when the middle layer is processed; in step ⑥ The drying time is 9 hours, and the floating sand is 75-mesh zirconia powder; the air humidity is 40% when the back layer is processed in step C, the drying time is 15 hours, and the floating sand is replaced with 50-mesh zirconia powder; in step (6), the mold shell is roasted: For the baking of the mold shell, first heat the mold shell to 200°C, keep it warm for 2 hours, then raise the temperature to 450°C, keep it warm for 2 hours, then raise the temperature to 1050°C, keep it warm for 2 hours, finally raise the temperature to 1180°...

Embodiment 3

[0068] Same as Example 1, the difference is that in step (2) when injecting wax, keep the ambient temperature at 35°C and the injection pressure at 0.15MPa; stir the wax at 70±2°C for 2-5h before use; step (4) ) in step A surface layer: the air humidity in this step is 70%, the drying time in step ③ is 8 hours, and the zircon sand used is 120 mesh zirconia powder; the air humidity in step B is 60% when the middle layer is processed; in step ⑥ The drying time is 8 hours, and the floating sand is 80-mesh zirconia powder; the air humidity is 60% when the back layer is processed in step C, the drying time is 12 hours, and the floating sand is replaced with 60-mesh zirconia powder; in step (6), the mold shell is roasted: For the baking of the mold shell, first heat the mold shell to 300°C, keep it warm for 1 hour, then raise the temperature to 700°C, keep it warm for 1 hour, then raise the temperature to 900°C, keep it warm for 3 hours, finally raise the temperature to 1210°C, and c...

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Abstract

The invention discloses a method for precisely casting a top cover of a mincing machine, which belongs to the field for machining components of a mincing machine. The method comprises the following steps of (1) producing a metal mold; (2) producing a wax mold; (3) inspecting and finishing the wax mold; (4) producing a mold shell; (5) removing wax; (6) roasting the mold shell; (7) pouring; and (8) vibrating the mold. By strictly controlling different parameters of each step, few defects exist in the obtained mold shell, the method is capable of machining and better suitable for machining the mincing machine top cover with the hole pitch being less than 5mm, and the machining precision is improved.

Description

technical field [0001] The invention belongs to the field of processing parts of meat grinder, and in particular relates to a precision casting method for a top cover of a meat grinder, and more specifically relates to a precision casting method for a top cover of a meat grinder with a distance between processing holes less than or equal to 5mm method. Background technique [0002] Meat grinder is an essential tool for meat processing enterprises in the production process. It can process raw meat into granular meat fillings with different specifications according to different process requirements, so as to be fully mixed with other auxiliary materials to meet the needs of different products. When the meat grinder is working, the raw meat is chopped by the shearing effect formed by the rotating cutting blade and the hole blade on the orifice plate, and the raw material is continuously discharged out of the machine under the action of the extrusion force of the screw. When in...

Claims

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Application Information

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IPC IPC(8): B22C7/02B22C9/04B02C18/30
Inventor 张厚林
Owner 沭阳华瑞金属制品有限公司
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