CN2062263U

CN2062263U - Ball type insulation riser cap

Info

Publication number: CN2062263U
Application number: CN 89219672
Authority: CN
Inventors: 刘振荣; 王希兆; 于敬修
Original assignee: HONGLI INSULATION MATERIAL FACTORY YINGSHANG VILLAGE JIMO COUNTY
Current assignee: HONGLI INSULATION MATERIAL FACTORY YINGSHANG VILLAGE JIMO COUNTY
Priority date: 1989-11-18
Filing date: 1989-11-18
Publication date: 1990-09-19

Abstract

The utility model discloses a ball type insulation feeder head cap used for casting. The utility model is composed of an upper hemisphere loose piece and a lower hemisphere loose piece, the upper hemisphere loose piece and the lower hemisphere loose piece are in a horizontal typing and respectively provided with trapezoidal or rectangular grooves and humps, and the upper hemisphere loose piece and the lower hemisphere loose piece are jogged in a vertical type. The utility model is made by 81.7 % to 78.3% magnesite powder, 7.8 % to 8.8% refractory fiber, 8% to 10% paper, 2.5% to 2.9% phenol resin, and right amount of water. The section of cutting diameter contains more refractory fiber and paper. The utility model can increase feeding efficiency more than 10%, productivity and yield can be improved, the cost of the utility model can be reduced, and the utility model can be used in casting industry.

Description

Ball type insulation riser cap

The utility model relates to spherical heatproof riser cover, more clearly says so to be used for the spherical heatproof riser cover of casting technique.

In Foundry Production, the shape of rising head directly influences its feeding effect and the shrinkage cavity degree of depth (position) therein, thereby further has influence on finished casting rate, quality, productivity ratio and cost.When the rising head volume is identical, with the surface area minimum of spheroid, the modulus maximum, area of dissipation is also just minimum.Facts have proved that the feeding efficiency of spherical heatproof riser improves nearly 10% than other shape rising head with volume.To this, existing clearly narration in " foundry technology " of China Machine Press's in June, 1985 version.This book also mentions, molding convenience during for moulding, and the loose piece structure is made with the apperance of spherical feeder cover by some factory.The spherical heatproof riser cover of the upper and lower two hemispheres loose piece structure of horizontal parting face somatotype is wherein a kind of.But the spherical heatproof riser cover in past mostly is flat greatly at the die joint place of upper and lower hemisphere, easily with upper and lower hemisphere dislocation, influences the feeding effect when moulding, following core operation.In order to overcome this shortcoming, in die joint place bonding, this complex process, time-consuming is prepared binding agent again with upper and lower hemisphere in the factory that has.The factory that also has makes peripheral groove and peripheral projection respectively with chimeric with upper and lower hemisphere at the die joint place.But because upper and lower hemisphere rising head jacket wall is thin, material is coarse again, and reality is difficult to make enough height, enough wide peripheral groove and projectioies, and very easy to wear, thereby often becomes a mere formality and inoperative.In addition, easily broken during the transportation of the spherical heatproof riser in past, the spherical heatproof riser cover that has is improper because of material mixture ratio, and the molding sand that easily bonds had both polluted molding sand, had strengthened difficulty and expense when cutting the position, footpath again, had wasted the energy.

The purpose of this utility model, be to overcome above-mentioned difficulties, provide a kind of technology simply, must not binding agent bond level die joint, and can well coincide, be difficult for dislocation again, the surface is difficult for the bonding molding sand, cut the footpath easily, be convenient to transportation, not breakable spherical heatproof riser cover.

In order to achieve the above object, the utility model spherical heatproof riser cover is had the episphere loose piece of venthole and is had the lower semisphere loose piece that easily cuts cylinder position, footpath with episphere loose piece horizontal parting and its underpart by the top and constituted.The episphere loose piece has been worn several trapezoidal or rectangular recess along horizontal parting, and lower semisphere loose piece upper end edge horizontal parting has been worn same number of trapezoidal or rectangular preiection, trapezoidal or rectangular recess and trapezoidal or rectangular preiection is chimeric up and down.Because to be the tooth shape chimeric, thereby the interlock of upper and lower hemisphere loose piece is tight, and because of there being some places chimeric, must not bond, the horizontal parting face where take up an official post to power all be difficult for making its dislocation.

Episphere loose piece of the present utility model and lower semisphere loose piece are made by the high-quality insulation material, its weight proportion is: magnesia powder 81.7～78.3%, refractory fibre 7.8～8.8%, paper 8～10%, phenolic resins 2.5～2.9%, at last in addition an amount of water is made with mould.The material mixture ratio of the inboard of easily cutting cylinder position, footpath of its lower semisphere loose piece contains more refractory fibre and paper, and this just makes the position, footpath of easily cutting of rising head be unlikely to scab.With the spherical heatproof riser cover that this prescription is made, its fire resistance height, good heat insulating, easily machine-shaping oven dry, be difficult for the bonding molding sand, thereby can improve finished casting rate and productivity ratio, the energy and expense when reducing the cutting rising head.Inboard of the present utility model is sphere, but its die joint place, outside can have a plurality of angles, plays the reinforcement effect, is convenient to transportation, it is broken to be difficult for.

The utility model spherical heatproof riser cover must binding agent bond level die joint, has saved binding agent and time, has overcome peripheral groove and the chimeric shortcoming bad, easy to wear of projection, and is chimeric good, is difficult for dislocation.The utility model is difficult for the bonding molding sand, and is fire-resistant, heat-insulating property is good.It improves feeding efficiency 8～11% than the cylindrical insulated feeder cover, has improved finished casting rate, quality and productivity ratio, has reduced cost, can be widely used in the casting industry.

Below in conjunction with drawings and Examples the utility model is done further explanation.Fig. 1 is the cross-sectional schematic after the chimeric assembling of the utility model spherical heatproof riser cover embodiment one.Among the figure, have the episphere loose piece 2 of venthole 1 and have the lower semisphere loose piece 4 chimeric globulate insulating riser sleeves that easily cut cylinder position, footpath 3.Schematic diagram when Fig. 2 separates slightly for upper and lower hemisphere loose piece.Among the figure, episphere loose piece 2 has 6 trapezoidal grooves 5 along horizontal parting face 7, lower semisphere loose piece 4 have 6 trapezoidal protruding 6, up and down can be chimeric.The vertical view of Fig. 3 when the episphere loose piece 2 of embodiment one taken away.6 trapezoidal grooves 5 and 6 trapezoidal protruding 6 as can be seen among the figure.Fig. 4 is the outline drawing of embodiment two.Among the figure as can be seen the outside 6 angles 8 are arranged.Its inboard then still is spherical.Present embodiment is difficult for dislocation, is difficult for sticking molding sand, improves feeding efficiency 10% than the cylindrical insulated feeder cover, and casting yield improves 4%, and cost has reduced by 1%.Can be widely used in the casting of steel-casting.

Claims

1, a kind ofly has the episphere loose piece of venthole and have the spherical heatproof riser cover that the lower semisphere loose piece that easily cuts cylinder position, footpath is constituted with episphere loose piece horizontal parting and its underpart by the top, it is characterized in that said episphere loose piece worn several trapezoidal or rectangular recess along horizontal parting, lower semisphere loose piece upper end edge horizontal parting has been worn same number of trapezoidal or rectangular preiection, trapezoidal or rectangular recess and trapezoidal or rectangular preiection is chimeric up and down.

2, according to the described spherical heatproof riser cover of claim 1, it is characterized in that said episphere loose piece and lower semisphere loose piece make by the high-quality insulation material, its weight proportion is: magnesia powder 81.7～78.3%, refractory fibre 7.8～8.8%, paper 8～10%, phenolic resins 2.5～2.9%, an amount of water is made in addition again.

3,, it is characterized in that the material mixture ratio of the inboard of easily cutting cylinder position, footpath of said lower semisphere loose piece contains more refractory fibre and paper according to claim 1 or 2 described spherical heatproof riser covers.

4, according to claim 1 or 2 described spherical heatproof riser covers, it is characterized in that said episphere loose piece and lower semisphere loose piece are inboard for spherical, die joint place in the outside has a plurality of angles.

5, according to the described spherical heatproof riser cover of claim 3, it is characterized in that said episphere loose piece and lower semisphere loose piece are inboard for spherical, die joint place in the outside has a plurality of angles.