CN205629280U - Disappearance mould that the whole cast used - Google Patents

Abstract

The utility model relates to a disappearance mould that the whole cast used, including the disappearance calligraphy or painting model body, characterized by: lower surface position at disappearance calligraphy or painting model convex part physically is provided with the occupy -place piece, and the occupy -place piece is not dissolved in molten steel or molten iron. The utility model has the advantages of the utility model overcomes the product swell phenomenon of block cast product was serious in the past, and effective technical scheme has been researched and developed to shortcoming that the rejection rate is high, and the product size uniformity of making is good, and the later stage processing cost is low, great saving the cost.

Description

The evaporative pattern that one piece casting uses

Technical field

This utility model relates to the evaporative pattern used in a kind of technique for integral casting, during being particularly suited for the one piece casting of complex object.

Background technology

Lost foam casting is that foam mould uses bindless dry sand to combine the cavityless casting of vacuum pumping technology, it is that the bubbles model bonding similar to casting dimension shape is combined into model cluster, after brushing fireproof coating and drying, it is embedded in vibration molding in drystone sand, pour into a mould under negative pressure, making model gasify, liquid metals occupies modal position, forms the novel casting method of foundry goods after solidification cooling.

Compared with conventional casting technologies, lost foam casting has features: 1. casting quality is good, low cost；2. material does not limits, and size is the most suitable；3. dimensional accuracy is high, any surface finish, reduces cleaning；4. internal flaw greatly reduces, dense structure；5. can realize extensive, production in enormous quantities.6. working environment be can be substantially improved, labor intensity, minimizing energy resource consumption reduced.

But when the shaped piece block cast that some appearances are complicated, during the landfill grains of sand, the grains of sand cannot fill full cloudy husky position (lower corners position), then will form room outside evaporative pattern, during pouring molten steel, will occupy room, be formed " bulge ", and product is i.e. scrapped.

Utility model content

The purpose of this utility model is to provide the evaporative pattern of a kind of one piece casting use to make up the deficiencies in the prior art.

This utility model is to achieve the goal to the technical scheme is that the evaporative pattern that one piece casting uses, and including evaporative pattern body, it is characterized in that: the lower surface position of the protruding parts of evaporative pattern body is provided with occupy-place block, and occupy-place block does not dissolves in molten steel or molten iron.

The beneficial effects of the utility model are: the product bulge phenomenon that this utility model overcomes conventional block cast product is serious, and the shortcoming that percent defective is high have developed effective technical scheme, and the product size concordance made is good, and post-production low cost has greatly saved cost.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the side partial views of Fig. 1.

Detailed description of the invention

In the drawings: 9 is evaporative pattern body, 10 is occupy-place block.

Embodiment:

During use, first manufacturing evaporative pattern body 9, general evaporative pattern body 9 material is foam, and is likely to occur cloudy husky inferior horn position, fixing occupy-place block 10 at evaporative pattern body 9, and fixed form can be bonding, and occupy-place stock material can be quartz sand.

After evaporative pattern body 9 is placed, according to casting procedure operation normally: during the landfill grains of sand, there is no room between the grains of sand and occupy-place block 10, thus secure the overall dimensions after molten steel molding, effectively avoid the generation of one-piece casting " bulge " phenomenon.

Claims (1)

1. the evaporative pattern that one piece casting uses, including evaporative pattern body, is characterized in that: the lower surface position of the protruding parts of evaporative pattern body is provided with occupy-place block, and occupy-place block does not dissolves in molten steel or molten iron.