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A super large external sand mold and its production process

A technology of appearance and sand molding, applied in the direction of casting mold, core, casting mold composition, etc., can solve the problems of prolonging the development cycle of new large diesel engines and hindering the development of rapid prototyping technology, so as to achieve simple and reasonable structure, convenient processing and high molding efficiency high effect

Active Publication Date: 2017-05-10
GUANGXI YUCHAI MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For large-scale diesel engine sand molds, the length is often more than 2 meters and the height is relatively high. The size of its huge sand mold has exceeded the processing range of ordinary CNC machine tools, so it cannot be processed by ordinary CNC machine tools. Sand mold cavity, which not only prolongs the development cycle of new large diesel engines, but also hinders the development of rapid prototyping technology

Method used

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  • A super large external sand mold and its production process
  • A super large external sand mold and its production process
  • A super large external sand mold and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1, such as Figure 1 to Figure 4 As shown, a super-large sand mold includes upper outer shape section A, upper outer shape section B, upper outer shape section A core skeleton, upper outer shape section B core skeleton, upper outer shape connecting frame, lower outer shape section A , Lower shape B section, lower shape A section core skeleton, lower shape B section core skeleton, lower shape connecting frame. It is characterized in that the upper shape section A (2) and the upper shape section B (3) form the upper shape, and the parting surface (11) of the upper shape is layered and hollowed out. a concave dowel (14). said next

[0033] Section A (10) of the exterior shape (10) and section B (8) of the bottom exterior form form the bottom exterior, and a plurality of concave positioning tenons ( 14) The convex positioning tenon (15) corresponding to the fastening. Around the waist of section A of the upper exterior shape (2) and section B of the upper exteri...

Embodiment 2

[0035] Embodiment 2, a kind of production process method of super large external molding sand mold, its steps are:

[0036] Step 1, making the blank:

[0037] During design, hollow out in layers at the parting surfaces (11) of the upper and lower shapes to form hollow cavities for the upper and lower shapes (12) and hollows for the lower shape (13) to reduce the size of the upper and lower shapes. The depth of the lower shape cavity is convenient for processing. Then the upper shape is divided into upper shape A section (2) and upper shape B section (3), and the lower shape is divided into lower shape A section (10) and lower shape B section (8);

[0038] The sand mold blanks of section A of the upper shape (2), section B of the upper shape (3), section A of the lower shape (10) and section B of the lower shape (8) are made respectively. In particular, during blank preparation, core skeletons are evenly distributed inside each sand mold blank to enhance the strength of t...

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Abstract

The invention discloses an extra-large outer appearance sand mold and a production process method. The extra-large outer appearance sand mold is characterized in that an upper outer appearance is composed of an upper outer appearance section A and an upper outer appearance section B, wherein multiple concave positioning dowels are arranged on the mold joint of the upper outer appearance in a layered and hollowed manner; a lower outer appearance is composed of a lower outer appearance section A and a lower outer appearance section B; and multiple convex positioning dowels which are correspondingly fastened with the concave positioning dowels are arranged on the mold joint of the lower outer appearance in a layered and hollowed manner. The extra-large outer appearance sand mold adopts the sectioned and layered seamless splicing technology and high-precision combination and has the advantages of simple and reasonable structure, convenience in process, simplicity and convenience in operation, low labor intensity, high mold assembling precision, high modeling efficiency, low cost and suitableness for sand molds of various outer appearances.

Description

technical field [0001] The invention relates to the field of diesel engine casting, in particular to a super-large external sand mold and a production process thereof. Background technique [0002] In the process of developing new diesel engine products, rapid prototyping technology has been popular in the production of sand cores and sand molds. Among them, the sand mold includes: the upper external sand mold and the lower external sand mold. The production of the upper shape and the lower shape generally adopts the CNC machine tool to mill the self-setting sand to obtain the upper shape cavity and the lower shape cavity respectively, without making molds. [0003] The traditional low-power diesel engine has a small sand mold, which can be processed by ordinary CNC machine tools. For large-scale diesel engine external sand molds, the length is often more than 2 meters, and the height is also high. The huge external sand mold size has exceeded the processing range of ordin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/02
CPCB22C9/02
Inventor 杨基林铭张俊许振冲王浩雷建华江诚亮范进钱
Owner GUANGXI YUCHAI MASCH CO LTD