CN206662200U - Rising head - Google Patents

Abstract

The utility model discloses a kind of rising head, belong to casting technology field.The rising head includes riser buss and riser neck, the top of the riser buss is provided with the pressure cone containing exothermic mixture, only exothermic mixture is provided with the high-precision rising head on the pressure cone, the upper surface of the pressure cone and sand mold or air contact, the bottom of the riser neck contacts with casting, the gradient of the riser neck and the gradient of riser buss are on the contrary, the angle between the riser neck and the contact surface of casting is less than 90 °.The utility model has good feeding effect to casting, and cost is low, to sand mold and the less pollution of molten metal.

Description

Rising head

Technical field

It the utility model is related to casting technology field, more particularly to a kind of rising head.

Background technology

Rising head is to avoid the supplement part that shrinkage cavity occurs in casting and shrinkage defect is attached to above casting or side. In casting mold, the die cavity of rising head is the cavity for storing liquid metal, and metal is fed when casting is formed, and prevents shrinkage cavity and porosity, row The effect of gas and collection slag, and the main function of rising head is feeding.Existing rising head has following species：1st, using common Modeling Materials Common rising head made of material；2nd, using insulated feeder made of insulation material, setting time ratio of the molten metal in insulated feeder Setting time length in common rising head, saves metal；3rd, exothermic mixture is added in Riser material and exothermic riser is made, poured into After molten metal, exothermic mixture exothermic heat of reaction, the metal liquid energy longer time is in liquid, molten metal is more saved than insulated feeder.4、 By insulating and heating riser is made after exothermic material and insulation material mixing, there is heat retaining and exothermal function at each position of rising head, can be with Molten metal is heated, riser feeding effect is better than common rising head and insulated feeder.But there are following shortcomings in such rising head：Heat preservation Rising head whole body all contains exothermic mixture, and casting is with emitting mouth contact position because overheat is also easy to produce the metallographics such as coarse grains, abnormal nodularizing Defect, cause the yield rate of casting relatively low；Heat preservation rising head poor air permeability, vertex of a cone atmospheric pressure DeGrain；Heating is protected Warm rising head is all made of heat preservation material, and not only gas forming amount is big, and has pollution to molten metal and sand mold, rising head into This is also higher.

Atmospheric feeder is used in addition, also having in some running gate systems, existing atmospheric feeder typically uses sand Type is made, and is that a fine sand core is inserted at the top of rising head, or vertex of a cone sand is made in moulding, and fine sand core or vertex of a cone sand extend into and emitted Mouth center.After being cast, rising head surface crust, because the radiating of vertex of a cone sand wedge angle position is slow, so vertex of a cone sand position molten metal Setting rate is slow, and the hole that external atmospheric pressure can still be by core is acted on interior metal liquid level, is emitted so as to add The feeding pressure of mouth.But the core of this atmospheric feeder or vertex of a cone sand do not heat the function of molten metal, the benefit of rising head Contract limited in one's ability.

Utility model content

The utility model offer is a kind of to have good feeding effect to casting, and cost is low, to sand mold and molten metal Less pollution rising head.

In order to solve the above technical problems, the utility model offer technical scheme is as follows：

A kind of rising head, including riser buss and riser neck, the top of the riser buss are provided with the pressure cone containing exothermic mixture, Exothermic mixture is only provided with the rising head on pressure cone, upper surface and sand mold or the air contact of the pressure cone are described to emit The bottom of mouthful neck contacts with casting, and the gradient of the riser neck and the gradient of riser buss are on the contrary, the riser neck and casting connect Angle between contacting surface is less than 90 °.

Further, the pressure cone is shaped as cone, and the cone angle of the cone is 50~80 °.

Further, embedded connection, inner edge of the pressure cone away from the riser buss between the pressure cone and riser buss The distance of edge is not less than 15mm.

Further, the temperature range that exothermic reaction occurs for the exothermic mixture in the pressure cone is 1000~1600 DEG C.

Further, the top of the riser buss is provided with bleed groove.

Further, the distance of the top outer surface of riser buss described in the bleed slot pitch is 1~2mm.

Further, all dimensional accuracies of the rising head are ± 0.3mm.

The utility model has the advantages that：

Compared with prior art, in rising head of the present utility model, riser buss and riser neck use common insulation material system Into and not adding exothermic mixture, only pressure cone contains exothermic mixture, and the exothermic mixture in pressure cone occurs after running into high-temperature liquid metal Exothermic reaction, amount of heat is discharged, heated the molten metal in rising head, extended the setting time of molten metal in rising head, carry The high feeding efficiency of rising head；The upper surface of pressure cone and sand mold or air contact so that pressure cone has good gas permeability, After pouring metal melt, rising head surface crust, the hole that external atmospheric pressure can still be by pressure cone is acted on inside rising head On metal bath surface, so as to add the feeding pressure of rising head；The small volume of pressure cone, the exothermic mixture used is few, and rising head cost is low, Pollution to sand mold and molten metal is also small, has both improved the yield rate of casting, reduces the pollution to environment again.In addition, this reality With it is new it is middle using the gradient of riser neck and the gradient of riser buss on the contrary, and angle between riser neck and the contact surface of casting Structure less than 90 °, it is not only able to good and sand mold withdrawing pattern gradient and is engaged, improves the burr at casting pressing port position and fly Side defect, and can improve due to the defects of full caused tissue of molten metal cooling velocity is thick and metallographic is bad.

Brief description of the drawings

Fig. 1 is the structural representation of rising head of the present utility model；

Fig. 2 is in Fig. 1 I close-up schematic view.

Embodiment

To make the technical problems to be solved in the utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing And specific embodiment is described in detail.

The utility model provides a kind of rising head, as depicted in figs. 1 and 2, including riser buss 1 and riser neck 3, riser buss 1 Top is provided with the pressure cone 2 containing exothermic mixture, is only provided with exothermic mixture, the upper table of pressure cone 2 in the rising head on pressure cone 2 Face and sand mold 6 or air contact, the bottom of riser neck 3 contact with casting 4, the gradient of riser neck 3 and the gradient phase of riser buss 1 Instead, the angle between the contact surface of riser neck 3 and casting 4 is less than 90 °.

In rising head of the present utility model, first, riser buss 1 and riser neck 3 do not add exothermic mixture, and only pressure cone 2 contains There is an exothermic mixture, after running into high-temperature liquid metal exothermic reaction occurs for the exothermic mixture in pressure cone 2, discharges amount of heat, heated Molten metal in rising head, the setting time of molten metal in rising head is extended, improve the feeding efficiency of rising head；Secondly, pressure cone 2 Upper surface and sand mold 6 or air contact so that pressure cone 2 has a good gas permeability, after pouring metal melt, emits discharge surface knot Shell, the hole that external atmospheric pressure can still be by pressure cone 2 are acted on the metal bath surface inside rising head, emitted so as to add The feeding pressure of mouth；Again, the small volume of pressure cone 2, the exothermic mixture used is few, and the cost of rising head is low, to sand mold and molten metal Pollution it is also small, both improved the yield rate of casting, and reduced the pollution to environment again.Emitted in addition, being used in the utility model Mouthful gradient of neck 3 and the gradient of riser buss 1 on the contrary, and the angle between the contact surface of riser neck 3 and casting 4 less than 90 ° Structure, it is not only able to good and sand mold withdrawing pattern gradient and is engaged, improve the burr and overlap defect at casting pressing port position, and And it can improve due to the defects of full caused tissue of molten metal cooling velocity is thick and metallographic is bad.

Further, pressure cone 2 is preferably shaped to cone, and the cone angle of cone is preferably 50~80 °.

Preferably, can be connected between pressure cone 2 and riser buss 1 by embedded, inward flange of the pressure cone 2 away from riser buss 1 away from From 15mm can be not less than.

Further, the temperature range that exothermic reaction occurs for the exothermic mixture in pressure cone 2 is 1000~1600 DEG C.Exothermic mixture The heat for occurring to discharge after exothermic reaction can heat molten metal, extend the setting time of molten metal in rising head, pouring metal melt Afterwards, rising head surface crust, the hole that external atmospheric pressure can still be by pressure cone 2 are acted on interior metal liquid level, so as to Add the feeding pressure of rising head.

In order to increase scavenging action of the rising head in casting process, as shown in Fig. 2 the top of riser buss 1 is preferably provided with Bleed groove 5.

Preferably, the distance of top outer surface of the bottom of bleed groove 5 away from riser buss 1 can be 1~2mm.When bleed groove 5 The distance of top outer surface of bottom and riser buss 1 when being more than 2mm, then the excessive effect of gas in influence rising head, easily draws Rise riser pressure in casting process excessive and produce misrun or the problems such as poring rate slows down；When the bottom of bleed groove 5 When being less than 1mm with the distance of the top outer surface of riser buss 1, then the intensity of riser buss 1 here is too low, is easily broken, causes Debris easily falls into sand mold die cavity from there, it is possible to causing casting flaw.

In order to increase the fit precision of rising head of the present utility model and sand mold 6, the dimensional accuracy of the rising head is preferably ± 0.3mm。

Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art For personnel, on the premise of principle described in the utility model is not departed from, some improvements and modifications can also be made, these improvement The scope of protection of the utility model is also should be regarded as with retouching.

Claims (7)

1. a kind of rising head, it is characterised in that including riser buss and riser neck, the top of the riser buss is provided with containing exothermic mixture Pressure cone, exothermic mixture is only provided with pressure cone in the rising head, upper surface and the sand mold or air of the pressure cone connect Touch, the bottom of the riser neck contacts with casting, the gradient of the riser neck and the gradient of riser buss on the contrary, the riser neck and Angle between the contact surface of casting is less than 90 °.

2. rising head according to claim 1, it is characterised in that the pressure cone is shaped as cone, the cone Cone angle be 50~80 °.

3. rising head according to claim 2, it is characterised in that embedded connection between the pressure cone and riser buss, it is described The distance of inward flange of the pressure cone away from riser buss is not less than 15mm.

4. rising head according to claim 1, it is characterised in that the temperature of exothermic reaction occurs for the exothermic mixture in the pressure cone It is 1000~1600 DEG C to spend section.

5. according to any described rising head in Claims 1-4, it is characterised in that the top of the riser buss is provided with bleed Groove.

6. rising head according to claim 5, it is characterised in that the top outer surface of riser buss described in the bleed slot pitch Distance is 1~2mm.

7. rising head according to claim 5, it is characterised in that all dimensional accuracies of the rising head are ± 0.3mm.