A kind of insulated feeder and formative method thereof
Technical field
The present invention relates to a kind of insulated feeder and formative method thereof.
Background technology
Traditional way is when when a certain foundry goods is put feeding head, to make first a rising head mould, outside apperance, put muff, muff and rising head mould directly are positioned over treat feeding correspondence position (having preseted the spill shallow slot), such as Fig. 1, put again sand, the consolidation molding sand.Because riser neck periphery A is empty to the indication position, in the operating process, A is difficult for consolidation to indication position riser neck periphery molding sand, and height dimension is wayward up and down for muff, so that muff and riser height direction are inconsistent, molding quality can not reach the requirement of process stipulation, has influence on the feeding efficiency of insulated feeder.
Adopt the conventional method moulding, rising head root tight sand difficulty, molding sand is difficult for consolidation, muff above-below direction play, size is difficult for guaranteeing that final rising head parameter and technological requirement deviation are large, has affected the feeding effect of rising head, rarefaction defect often appears in foundry goods.
Summary of the invention
The invention provides a kind of new insulated feeder sand mold and formative method thereof, be difficult to control to solve traditional design method muff short transverse putting position in modeling process, make the riser neck position be difficult to back-up sand and the inadequate technical problem of the degree of packing.
Technical scheme of the present invention is as follows:
A kind of formative method of insulated feeder may further comprise the steps:
(1) preparation riser neck mud core, the center of riser neck mud core is cylindrical hole, the internal diameter of riser neck mud core is than the large 1 ~ 2mm of maximum outside diameter of the riser neck position of rising head mould;
What (2) riser neck mud core is placed casting die treats the feeding correspondence position, as substrate the rising head mould is installed with riser neck mud core, then at the rising head mould muff is installed;
(3) put sand, the consolidation sand mold, after the curing, riser neck mud core, molding sand natural combination are integrated;
(4) withdraw from casting die and rising head mould, namely finish moulding, obtain and the on all four insulated feeder of technological parameter.
Above-mentioned riser neck mud core and molding sand all adopt resin sand.
A kind of insulated feeder that adopts above-mentioned formative method to obtain, comprise muff and be wrapped in the outer rising head main body sand mold of muff sidewall, this rising head main body sand mold is according to rising head mould and muff moulding gained, its special character is: the riser neck of described insulated feeder is made of pre-buried riser neck mud core, and described pre-buried riser neck mud core outer wrap has the molding sand identical with rising head main body sand mould material.
Above-mentioned pre-buried riser neck mud core and rising head main body sand mold all adopt resin sand, and the two natural combination is integrated.
The present invention has the following advantages:
1, this method is simple, has guaranteed the height dimension of riser neck, makes must not adjust in the modeling process to proofread and correct muff short transverse putting position, and the riser neck position is difficult to back-up sand and the inadequate problem of the degree of packing is able to basic solution.
2, pre-buried riser neck mud core, the riser neck size is accurate after the moulding, sand mold compacting.Muff is consistent with rising head above-below direction height, effectively brings into play the feeding effect of rising head, rarefaction defect do not occur.
3, improve moulding efficient, guaranteed riser supplement shrink efficiency, similar casting pressing port moulding is had promotional value.
Description of drawings
Fig. 1 is the formative method schematic diagram of traditional insulated feeder;
Fig. 2 is riser neck mud cored structure schematic diagram of the present invention;
Fig. 3 is the schematic diagram that each parts arranges in the modeling process of the present invention;
Fig. 4 is the schematic diagram after moulding of the present invention is finished.
Above accompanying drawing is longitudinal cross-sectional view, the drawing reference numeral explanation:
The 1-muff; 2-rising head mould, the riser neck position of 21-rising head mould; The 3-casting die; The 4-rising head; 5-riser neck mud core; The 6-foundry goods.
The specific embodiment
The present invention adopts the technological thought of pre-buried riser neck mud core, makes first general core box one pair, makes riser neck mud core.When carrying out the moulding operation, the mud core that has prepared is placed on mould riser neck position, put again rising head, muff is placed on riser neck mud core top, then begin to put sand, consolidation.Molding sand takes out after solidifying, and casting die and rising head mould are namely finished the on all four insulated feeder of moulding acquisition and technological parameter.
Specific as follows:
1, do riser neck core box one pair, preparation riser neck mud core, riser neck mud core shape is as shown in Figure 2.The center of riser neck mud core is cylindrical hole, through repeatedly test, determines that the internal diameter of riser neck mud core is more proper than the large 1 ~ 2mm of maximum outside diameter of the riser neck position of rising head mould;
2, riser neck mud core is placed in the treating on the feeding correspondence position (identical with the position of traditional approach) of casting die, as substrate the rising head mould is installed with riser neck mud core, put again muff, then put sand, the tight sand moulding.As shown in Figure 3.
3, after moulding was finished, casting die and rising head mould withdrawed from, and riser neck core and Foundry quartz sand and be combined as a whole, muff are stayed and formed the true-to-size insulated feeder in the type.Such as Fig. 4.Riser neck mud core position blanks and embodies with dotted line among Fig. 4, is that outside with it Foundry quartz sand of expression riser neck mud core this moment is closely as one.
Adopt the mode of above pre-buried riser neck mud core, the riser neck size is accurate after the moulding, sand mold compacting.Muff is consistent with rising head above-below direction height, effectively brings into play the feeding effect of rising head, rarefaction defect do not occur.Make must not adjust in the modeling process and proofread and correct muff short transverse putting position, the riser neck position is difficult to back-up sand and the inadequate problem of the degree of packing is able to basic solution.