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Hollow ceramic core by mold swing method and preparation method thereof

A technology of hollow ceramics and cores, which is applied to cores, casting molding equipment, casting molds, etc., can solve the problems of low cleaning efficiency and difficulty in cleaning and removing ceramic cores, so as to reduce the workload of core removal, Improved core removal efficiency and low shrinkage

Active Publication Date: 2021-01-26
蓝山永晖玩具制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hollow ceramic core, which solves the problems of the prior art that the ceramic core is difficult to clean and remove after the molten metal is solidified, and the cleaning efficiency is low.

Method used

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  • Hollow ceramic core by mold swing method and preparation method thereof
  • Hollow ceramic core by mold swing method and preparation method thereof
  • Hollow ceramic core by mold swing method and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0028] The preparation method of the above-mentioned hollow ceramic core of the present invention is implemented according to the following steps:

[0029] Step 1, preparing refractory beads adhered with binder,

[0030] Weigh 90%-96% of refractory matrix raw material, 1%-5% of binder, 0.25%-1% of catalytic curing agent, 0.05%-0.1% of lubricating and dispersing agent, 0.05%-0.5% of two-phase coupling agent according to mass percentage %, mix and stir evenly to obtain refractory beads of aluminum oxide adhered with binder.

[0031] Step 2, blowing the refractory beads prepared in step 1 into a closed swing range of 30°-90° (heat-resistant steel) mold 1 to prepare the core body, the specific process is as follows:

[0032] Prepare surface layer 2 (surface layer 2 is close to the inner wall of mold 1): heat mold 1 to 150-300°C, blow in fused corundum beads or white corundum beads of 100-500 mesh, heating time 30-40s, and shake the mold 1. Make the refractory beads evenly form a...

Embodiment 1

[0038] Step 1, preparing refractory beads with binder,

[0039] The raw materials were weighed according to the following mass percentages: refractory matrix material fused corundum beads 96%, binder 3%, catalytic curing agent 0.45%, lubricating dispersant barium stearate 0.05%, two-phase coupling agent aluminum acid compound coupling 0.5% of the joint agent is mixed and stirred evenly to obtain the aluminum oxide refractory beads with the binder.

[0040] Step 2. Blow the refractory beads prepared in step 1 into a closed heat-resistant steel mold with a swing range of 30°-90° to prepare the core body. The specific process is as follows:

[0041] Preparation of surface layer 2: Heat the mold to 150°C, blow in 500-mesh refractory beads, heat for 30s, shake the mold so that the refractory beads evenly form a dense sintered layer of aluminum oxide with a thickness of 0.2mm on the inner wall of the mold, turn over the mold, Pour off excess refractory beads.

[0042] Preparation ...

Embodiment 2

[0047] Step 1. Preparation of refractory beads with binder

[0048] The raw materials were weighed according to the following mass percentages: refractory matrix material fused corundum beads 95%, binder 4%, catalytic curing agent 0.4%, lubricating dispersant barium stearate 0.545%, two-phase coupling agent aluminum acid compound coupling 0.055% of the joint agent is mixed and stirred evenly to obtain the aluminum oxide refractory beads with the binder.

[0049]Step 2. Blow the refractory beads prepared in step 1 into a closed heat-resistant steel mold with a swing range of 30°-90° to prepare a hollow ceramic core. The specific process is:

[0050] Preparation of surface layer 2: Heat the mold to 170°C, blow in 300-mesh refractory beads, heat for 35s, shake the mold so that the refractory beads are evenly formed on the inner wall of mold 1 to form a dense sintered layer of 0.4mm aluminum oxide, turn over the mold, Pour off excess refractory beads.

[0051] Preparation of inn...

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Abstract

The invention discloses a hollow ceramic core which is composed of the following components in percentage by mass: 90%-96% of a refractory matrix raw material, 1%-5% of a binder, 0.25%-1% of a catalytic curing agent, 0.05%-0.1% of a lubricating dispersant and 0.05%-0.5% of a two-phase coupling agent, totaling 100%. The invention also discloses a preparation method of the hollow ceramic core by themold swinging method. The preparation method comprises the following steps: 1) preparing refractory beads adhered with an adhesive; 2) blowing the refractory beads prepared in the step 1 into a closed mold with the swing amplitude of 30-90 degrees to prepare a mold core blank; and 3) putting the mold core blank prepared in the step 2 into a sintering furnace to be sintered to prepare the shell type ceramic mold core. According to the preparation method disclosed by the invention, the hollow ceramic core structure can be conveniently prepared, and meanwhile, as the porosity in the ceramic coreis improved, the core removal workload is reduced, so that the core removal efficiency is improved, the core is prevented from being trimmed, and the bending strength and the toughness of the core are improved.

Description

technical field [0001] The invention belongs to the technical field of ceramic cores, and relates to a hollow ceramic core, and also relates to a method for preparing a hollow ceramic core by a mold swing method. Background technique [0002] The ceramic core is used as an adapter to form the cavity of the casting. Its function is to form the inner cavity structure of the casting, and together with the external mold or shell, ensure the dimensional accuracy requirements of the casting for the cavity, simplify the process difficulty, reduce the cost, and improve the quality of the casting. A special process means of product pass rate. Ceramic cores are mainly used in aero-engines to form complex cavity structures of hollow turbine blades. Ceramic cores must not only have good room temperature strength to ensure transportation and operability, but also have good high-temperature performance to withstand high-speed wax liquid and The impact of high temperature molten metal. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/02B22C1/14B22C1/22B22C9/10
CPCB22C1/02B22C1/14B22C1/2253B22C9/10
Inventor 屈银虎张红高浩斐王钰凡何炫张学硕
Owner 蓝山永晖玩具制品有限公司
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