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A Method of Utilizing Partial Lost Foam Casting Bracket

A technology of lost foam casting and lost foam, which is applied in the direction of casting molding equipment, molds, mold components, etc., and can solve problems such as high one-time investment, high unit cost, and complicated production preparation.

Active Publication Date: 2021-07-06
山东汇金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method of using partial lost foam casting bracket to solve the problems of complicated production preparation, high one-time investment or high unit cost proposed in the above-mentioned background technology

Method used

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  • A Method of Utilizing Partial Lost Foam Casting Bracket
  • A Method of Utilizing Partial Lost Foam Casting Bracket
  • A Method of Utilizing Partial Lost Foam Casting Bracket

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] refer to Figure 1-4 , a kind of method utilizing local lost foam 5 to cast support, comprises the following steps:

[0029] Step 1: Make the pattern: the pattern is made by hand in batch hours, the method is as follows: use foam board, use the vertical electric cutting pattern machine to cut out the pattern according to the pattern, and use the drill tool, drilling machine equipment, and drilling tooling for the three tapered holes processed out.

[0030] Step 2: The riser sleeve 4 is bonded to the lost foam 5; the lost foam 5 includes a body 501, the body 501 is cylindrical, and the outer circumference of the body 501 is fixed with three identical extensions 502 at equal angles, each extension A drill hole 503 is provided at the lower end of the 502 . The material of the lost foam 5 is expandable polystyrene resin beads, expandable methyl methacrylate and styrene copolymer resin beads.

[0031] Step 3: The sand core 3 is made of self-hardening resin sand. When maki...

Embodiment 2

[0036] refer to Figure 1-4 , a kind of method utilizing local lost foam 5 to cast support, comprises the following steps:

[0037] Step 1: Make the pattern: the pattern is made as a custom-molded plastic foam model when the batch is large.

[0038] Step 2: The riser sleeve 4 is bonded to the lost foam 5; the lost foam 5 includes a body 501, the body 501 is cylindrical, and the outer circumference of the body 501 is fixed with three identical extensions 502 at equal angles, each extension A drill hole 503 is provided at the lower end of the 502 . The material of the lost foam 5 is expandable polystyrene resin beads, expandable methyl methacrylate and styrene copolymer resin beads.

[0039] Step 3: The sand core 3 is made of self-hardening resin sand. When making the core, the riser sleeve 4 and the lost foam 5 are positioned, and then the solid core sand is pounded; after the core is made, the sand attached to the bare surface of the lost foam 5 is cleaned;

[0040] Step 4:...

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Abstract

The invention discloses a method for casting a bracket by using a local lost foam, relates to the field of casting, and comprises the following steps: Step 1: making the lost foam. Step 2: Bonding of the riser sleeve and the lost foam; Step 3: Core making, the sand core is made of self-hardening resin sand. When making the core, position the riser sleeve and the lost foam and pound the core sand; clean the sand attached to the bare surface of the lost foam after core making; step 4: place the finished sand core (including the riser sleeve and the lost foam) in the sand mold For sand-buried molding, in order to prevent choking, vent holes are made on the top of the riser sleeve, and the mold located above the riser sleeve is pierced with several air holes to ventilate the atmosphere. Step 5: Pouring the finished sand mold, the cavity formed by the partial lost foam and then pyrolyzing and "disappearing" is filled with molten metal, and finally a complete casting is obtained. The invention combines the advantages of sand mold and lost foam casting methods, simplifies molding operation and saves casting cost.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a method for casting a bracket by using partial lost foam. Background technique [0002] Casting is a method of forming liquid metal. Among the various casting methods, sand casting is the most commonly used. Because sand casting has almost no restrictions on casting shape, size, weight, alloy type, production batch, etc., it accounts for more than 70% of casting casting methods. According to the structural characteristics of castings, sand casting is generally two-box molding, three-box molding or multi-box molding in terms of molding methods. Parting is for drawing or taking molds during molding. For parts that cannot be directly drawn in the parting direction, the method usually used is to use loose block molding or core molding. Some castings are difficult and cumbersome to type, which increases the cost of molding. . [0003] With the improvement of casting requirements...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C7/02B22C9/04B22C9/02B22C9/10B22C9/22B22C9/08
CPCB22C7/02B22C9/02B22C9/046B22C9/088B22C9/10B22C9/22
Inventor 孔庆柱陈淦李兆霞刘清良吕海峰任加新
Owner 山东汇金股份有限公司