Preparation method of ceramic shell for eliminating thermal joints of conjoined blades

A ceramic type and blade technology, which is applied to casting molding equipment, cores, casting molds, etc., can solve the problems of sand accumulation, loose defects of blade body, etc., achieve high production efficiency, eliminate loose defects of blade body, and simple operation process Effect
CN107812883BActive Publication Date: 2019-07-19DONGFANG TURBINE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DONGFANG TURBINE CO LTD
Publication Date
2019-07-19

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Abstract

The invention discloses a method for preparing a ceramic shell for eliminating heat joints of a conjoined blade body, comprising the following steps: S1: making a wax model module of a conjoined blade; S2: making a ceramic shell of a conjoined blade module: S21: Clean the combined blade wax mold module; S22: Use the dipping method to make the ceramic shell, dip the cleaned combined blade module in the ceramic slurry, and put the combined blade mold coated with the ceramic slurry The group is covered with a sand layer in the sand shower, and then dried to form a layer of ceramic shell; S23: repeat S22 several times, that is, repeat the manufacturing operation of several layers of ceramic shells; S24: in the process of step S23, in the blade Disappearing layers are set in the gaps between the ceramic shells of the modules, thereby ensuring the strength of the ceramic shells at the back of the blade and the leaf pot, and eliminating the generation of thermal joints between the conjoined blades; S25: the finished product in S24 On the basis of ceramic slurry sealing, the final ceramic shell is formed.
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Description

technical field

[0001] The invention relates to the field of ceramic mold shell preparation, in particular to a ceramic mold shell preparation method for eliminating the thermal joint of the blade body of a conjoined blade. Background technique

[0002] Aero-engine turbine blades and gas turbine blades are manufactured by precision casting. At present, precision casting mainly refers to lost wax precision casting. The main process includes: pressing the blade and pouring the wax mold of the gating system, forming a wax tree according to the process requirements of the blade and gating system; The preparation of the shell is mainly carried out by the method of dipping and pouring sand, that is, the surface of the wax tree is evenly wrapped with a layer of ceramic slurry and then sprayed with sand, so that the slurry layer is completely and evenly covered with a layer of sand of refractory material. After drying for a period of time, The slurry and the refractory sand constit...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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