CN102211144A - Casting method of core of casting mould - Google Patents

Abstract

The invention discloses a casting method of a core of a casting mould, comprising the following steps of: firstly assembling and sealing the casting mould, injecting liquid (water) from an inlet, and then placing a sealing plug containing a water discharge guide pipe into a water injection opening; secondly placing the casting mould at a sealing environment with specified cooling and heat-preserving effects and relatively closed conditions so that water is coagulated and formed into an ice body at the closed environment, and then taking an obtained ice core out of the casting mould and placing the ice core into a specified environment for storage and later use; finally assembling the ice core into the casting mould, injecting waxes, cooling, and melting the core so as to obtain a wax mould with a needed cavity. According to the casting method disclosed by the invention, environmental pollution is eliminated; a production period is shortened; resource waste is prevented; a field work environment is improved; the problems of wax saponification is solved; and the stability of casting quality is enhanced.

Description

The casting method of casting die core rod

Technical field

The present invention relates generally to the water-soluble core of hot investment casting field, relates in particular to the method that replaces traditional urea core and water soluble wax core.

Background technology

Existing hot investment casting wax-pattern inner chamber formation method has: metal pattern loose core (piecemeal is loosed core and inlay to overlap and looses core) Hough mould, urea core, water soluble wax core etc.; Wherein, urea core and water soluble wax core belong to water-soluble core;

Urea core and water soluble wax have overcome can't the loose core shortcoming of delivery of complicated inner cavity, have avoided the inner chamber repairing simultaneously, can carry out the comparatively making of complex product of shape;

But the problem of current maximum is: when the urea core is made, can decomposite NH in the time of 150 ℃, promptly contaminated environment is corroded mould again; Urea is separated by water-soluble, if it is bigger directly to discharge environmental pollution, recovery and processing cost are too high again, and can influence the performance of wax-pattern surface quality and wax because of the contact solution surface forms saponified wax in the wax-pattern course of dissolution; Though the water soluble wax pollutant discharge amount is less relatively, but dissolving especially difficulty (general urea core a few minutes are to the dozens of minutes dissolving, the water soluble wax dissolving but needs several hrs even several days time, pass in time during this time, solution solubility descends, also needing to regulate) time is oversize, the manufacturing cost height, the cycle is long; In the course of dissolution, solution also can produce saponification to wax.

Summary of the invention

The object of the invention is exactly in order to remedy the defective of prior art, a kind of technology that is used for replacing urea core and water soluble wax is provided, this method has been eliminated environmental pollution, has been shortened the production cycle, avoided the wasting of resources, improved the work on the spot environment, solve wax saponification problem, improved the stability of casting quality.

The present invention is achieved by the following technical solutions:

(1) at first, with mould assembling, sealing, pour into water from inlet, packing at water filling port afterwards contains the sealing-plug of drainage duct;

(2) then, described mould is placed in the environment that is sealed with appointment cooling, heat insulation effect and relative airtight condition; Being allowed to condition at condenses in this closed environment and form ices core;

(3) last, will ice core and be assembled in the mould, casting, cooling, core melt, and obtain the wax-pattern of required die cavity.

Described ice core in whole flow process solid-state and liquid between conversion, non-environmental-pollution is reused in nature circulation back, aboundresources is renewable.

The present invention is directed to that the mould impression difficulty repairs medium and small foundry goods, use core mold to make the ice core, use the ice core and the method for outer die combination casting to obtain the wax-pattern that contains complicated inner cavity, then (by the technological requirement assembly welding together with independent wax-pattern through the group tree, form " tree "), coating, dewax, casting, and finally obtain foundry goods.

Advantage of the present invention is:

This method has replaced the water soluble wax core of heavy-polluted urea core and dissolving difficulty, remedies the defective of prior art.

Technology of the present invention has been eliminated environmental pollution, has been shortened the production cycle, has avoided the wasting of resources, has improved the work on the spot environment, has solved wax saponification problem, has improved the stability of casting quality.

Description of drawings

Fig. 1 is ice core mold structural representation.

The specific embodiment

Referring to accompanying drawing, a kind of casting method of casting die core rod: Fig. 1 is described ice core mold structural representation: core 1; Sealing joint strip 2; Sealing-plug 3; Drainage duct 4,

(1) at first, with mould assembling, sealing, pour into liquid (water) from inlet, packing at water filling port afterwards contains the sealing-plug of drainage duct;

(2) then, described mould is placed in the environment that is sealed with appointment cooling, heat insulation effect and relative airtight condition; Be allowed to condition at and condense in this closed environment and form ice body;

(3) then, the ice core that obtains is taken out from mould, put into designated environment and preserve standby;

(4) last, will ice core and be assembled in the mould, casting, cooling, core melt, and obtain the wax-pattern of required die cavity.

Claims (2)

1. the casting method of a casting die core rod is characterized in that:

(1) at first, with mould assembling, sealing, packing at water filling port after inlet pours into water is provided with the sealing-plug of drainage duct;

(2) follow, described mould is placed in the environment that is sealed with appointment cooling, heat insulation effect and relative airtight condition, being allowed to condition at condenses in this closed environment and form ices core;

(3) last, will ice core and be assembled in the mould, casting, cooling, core melt, and obtain the wax-pattern of required die cavity.

2. the casting method of casting die core rod according to claim 1 is characterized in that: described ice core is raw material or other fluent materials with water.

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