CN104923731A - V-process production method - Google Patents

Abstract

The invention discloses a V-process production method. The V-process production method comprises the following steps: 1) adhering a preheated plastic film onto a pattern and the whole surface of a template in a sucking manner, and uniformly spraying quick-drying paint on the film; 2) placing a sandbox with an aspirating chamber on the template; 3) filling the sandbox with dry sand without a binder, water or additives, slightly vibrating while sand feeding to ensure that the sandbox is fully filled with dry sand, planning, covering the top of the sandbox with a material film again, and vacuumizing through the walls of the sandbox; 4) turning the sandbox, drawing, and taking out a new pattern, namely a sand mould with the hardness about 90 degrees, wherein under the action of atmospheric pressure, the plastic film is evenly adhered onto the sand mould to enable the sand mould to be at a compact state; 5) assembling the mould, wherein negative pressure of a casting mould is maintained to pouring; 6) after completion of solidification of a casting, releasing the negative pressure to enable the casting mould to be collapsed automatically, and taking out the casting from casting dry sand.

Description

A kind of V method moulding production method

Technical field

The present invention relates to a kind of V method moulding production method.

Background technology

The moulding of V method and V method (V--Process) are a kind of vacuum sealed molding casting methods, also known as vacuum moulding.Molding operation is complicated, and light casting moulding productivity ratio is not high.From moulding, mould assembly, cast until casting falling sand, all will keep negative pressure to casting mold, this brings certain difficulty to mechanization Production line.In addition, the percentage elongation of plastic sheeting and the restriction of formability, affect the expansion of this method range of application.

Summary of the invention

The technical problem to be solved in the present invention overcomes existing defect, provides the high strength grinder hammerhead of a kind of Gao Ge, manganese steel material.

Object of the present invention carrys out specific implementation by the following technical programs:

A kind of V method moulding production method, comprises the steps:

1) by the plastic sheeting that heats in advance under suction function, inhale and be attached to apperance, on the whole surface of template, then on film, spray quick drying paint equably;

2) sandbox with aspirating chamber is put;

3) filling not adding additives, moisture and accrete dry sand, Jia Sha limit, limit vibrates slightly, to ensure that dry sand fills up sandbox, strikes off, and at sandbox top mulch film again, vacuumized by sandbox tank wall;

4) mould turnover, molding, due to the effect of atmospheric pressure, plastic sheeting is attached on sand mold equably, and makes molding sand be in compacted state, takes out apperance, reaches the sand mold that hardness is about 90 degree;

5) mould assembly, the negative pressure state of casting mold is maintained to cast;

6), after casting solidification completes, remove negative pressure, casting mold is defeated and dispersed voluntarily, from casting mold dry sand, take out foundry goods.

Preferably, above-mentioned V method moulding production method, concrete technology step and technological parameter as follows:

1) negative pressure is transferred to 0.04 ~ 0.06MPa, and pressurize, by film heating 0.8min, time softening shinny, carry out overlay film;

2) bonding dead head, prescinds dead head position film with blade, places dead head, bonding, guarantees to leak gas;

3) even application coating, ensures that coating layer thickness is between 0.5 ~ 1mm, emits port part and important thick large and leak brush position and carry out benefits brush, dries up the position electricity consumption of not easily drying;

4) after the abundant drying of coating, put sandbox well by flask pin, must not note during placement and touch dead head;

5) mould is inserted on plain bumper after putting sandbox well, adds sand and jolt ramming, and time of vibration is 40 ~ 60 seconds;

6) strike off molding sand after jolt ramming, be covered with film, connect sandbox negative pressure and open, pressure is 0.04 ~ 0.06MPa, pressurize, close negative pressure chamber, top box glues dead head, carry out the demoulding, to the place of the place's of scratching gas leakage and peacefully to mend after the demoulding, the casting bed in smooth cast place, is then placed on pouring area the mo(u)ld bottom half having turned over case simultaneously, carrying out lower core operation, is that 35mm puts chill by chill and surface of mould cavity spacing;

7) coremaking, lower core and mould assembling, after getting togather case, connect negative tube, and negative pressure adjustment is 0.04 ~ 0.06MPa, cast, pouring temperature is 1210 ~ 1310 DEG C, and pressurize 1.5h after cast, after casting solidification completes, remove negative pressure, casting mold is defeated and dispersed voluntarily, from casting mold dry sand, take out foundry goods.

V method moulding production method of the present invention, by the improvement of refinement, makes it not be subject to the percentage elongation of plastic sheeting and the restriction of formability, has expanded the range of application of V method moulding.

Detailed description of the invention

Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.

embodiment 1:

V method moulding production method, concrete technology step and technological parameter as follows:

1) negative pressure is transferred to 0.04 ~ 0.06MPa, and pressurize, by film heating 0.8min, time softening shinny, carry out overlay film;

2) bonding dead head, prescinds dead head position film with blade, places dead head, bonding, guarantees to leak gas;

3) even application coating, ensures that coating layer thickness is between 0.5 ~ 1mm, emits port part and important thick large and leak brush position and carry out benefits brush, dries up the position electricity consumption of not easily drying;

4) after the abundant drying of coating, put sandbox well by flask pin, must not note during placement and touch dead head;

5) mould is inserted on plain bumper after putting sandbox well, adds sand and jolt ramming, and time of vibration is 40 ~ 60 seconds;

6) strike off molding sand after jolt ramming, be covered with film, connect sandbox negative pressure and open, pressure is 0.04 ~ 0.06MPa, pressurize, close negative pressure chamber, top box glues dead head, carry out the demoulding, to the place of the place's of scratching gas leakage and peacefully to mend after the demoulding, the casting bed in smooth cast place, is then placed on pouring area the mo(u)ld bottom half having turned over case simultaneously, carrying out lower core operation, is that 35mm puts chill by chill and surface of mould cavity spacing;

7) coremaking, lower core and mould assembling, after getting togather case, connect negative tube, and negative pressure adjustment is 0.04 ~ 0.06MPa, cast, pouring temperature is 1210 ~ 1310 DEG C, and pressurize 1.5h after cast, after casting solidification completes, remove negative pressure, casting mold is defeated and dispersed voluntarily, from casting mold dry sand, take out foundry goods.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (2)

1. a V method moulding production method, is characterized in that: comprise the steps:

1) by the plastic sheeting that heats in advance under suction function, inhale and be attached to apperance, on the whole surface of template, then on film, spray quick drying paint equably;

2) sandbox with aspirating chamber is put;

3) filling not adding additives, moisture and accrete dry sand, Jia Sha limit, limit vibrates slightly, to ensure that dry sand fills up sandbox, strikes off, and at sandbox top mulch film again, vacuumized by sandbox tank wall;

4) mould turnover, molding, due to the effect of atmospheric pressure, plastic sheeting is attached on sand mold equably, and makes molding sand be in compacted state, takes out apperance, reaches the sand mold that hardness is about 90 degree;

5) mould assembly, the negative pressure state of casting mold is maintained to cast;

6), after casting solidification completes, remove negative pressure, casting mold is defeated and dispersed voluntarily, from casting mold dry sand, take out foundry goods.

2. V method moulding production method according to claim 1, is characterized in that: concrete technology step and technological parameter as follows:

1) negative pressure is transferred to 0.04 ~ 0.06MPa, and pressurize, by film heating 0.8min, time softening shinny, carry out overlay film;

2) bonding dead head, prescinds dead head position film with blade, places dead head, bonding, guarantees to leak gas;

3) even application coating, ensures that coating layer thickness is between 0.5 ~ 1mm, emits port part and important thick large and leak brush position and carry out benefits brush, dries up the position electricity consumption of not easily drying;

4) after the abundant drying of coating, put sandbox well by flask pin, must not note during placement and touch dead head;

5) mould is inserted on plain bumper after putting sandbox well, adds sand and jolt ramming, and time of vibration is 40 ~ 60 seconds;

6) strike off molding sand after jolt ramming, be covered with film, connect sandbox negative pressure and open, pressure is 0.04 ~ 0.06MPa, pressurize, close negative pressure chamber, top box glues dead head, carry out the demoulding, to the place of the place's of scratching gas leakage and peacefully to mend after the demoulding, the casting bed in smooth cast place, is then placed on pouring area the mo(u)ld bottom half having turned over case simultaneously, carrying out lower core operation, is that 35mm puts chill by chill and surface of mould cavity spacing;

7) coremaking, lower core and mould assembling, after getting togather case, connect negative tube, and negative pressure adjustment is 0.04 ~ 0.06MPa, cast, pouring temperature is 1210 ~ 1310 DEG C, and pressurize 1.5h after cast, after casting solidification completes, remove negative pressure, casting mold is defeated and dispersed voluntarily, from casting mold dry sand, take out foundry goods.