CN217432965U - Sprue bar for investment casting - Google Patents

Abstract

The utility model discloses a gate stick for investment casting, include the runner piece of making by the wax material, casting tube and casting block, runner piece funnel-shaped structure, and be equipped with the arc on its inclined plane and cave in, runner piece upper portion is equipped with the guide arm, runner piece lower part is equipped with the casting tube of back taper structure, the casting tube outer wall is equipped with and is spiral helicine bead, the casting tube lower part is equipped with the casting piece, the runner piece, casting tube and casting block form the runner respectively after processing melting wax treatment, casting runner and buffer casting chamber, the runner, the cooperation of casting runner and buffer casting chamber forms the casting runner that is used for casting the molten iron, wherein the slope inner wall of runner forms the slow flowing slope that is used for carrying out the buffer treatment to the molten iron through the arc sunken, the inner wall of casting runner forms spiral chute through the bead; through the utility model discloses can effectively solve traditional through type sprue bar casting in-process, produce the molten iron easily and splash, beat the condition of revolving, improve the casting quality greatly.

Description

Sprue bar for investment casting

Technical Field

The utility model relates to a foundry goods instrument technical field especially relates to a gate stick for investment casting.

Background

Investment casting is also called lost wax casting, and is a casting scheme that a pattern is made of fusible materials, a plurality of layers of shells made of refractory materials are wrapped on the surface of the pattern, the pattern is melted and discharged from the shells, so that a casting mold without a parting surface is obtained, and after lost wax by steam or boiling water, the casting mold can be filled with sand and poured after being roasted at high temperature. Because patterns are widely made from waxy materials, investment casting is often referred to as "lost wax casting".

During casting, firstly, a casting to be made is made into a model by using a wax material, the model is welded on a gate rod by using the same material to make a module (the casting can be singly made into a group when being large), refractory coating (a mixture of water glass or silica sol and refractory powder) is dipped on the surface of the module, then refractory sand is sprinkled (slurry is sprinkled and sand is sprinkled repeatedly for several times to make a sand layer thick enough), after the casting is dried and solidified, the module is heated, the wax material is separated from the gate to form a hollow shell and is roasted to form a firm mould shell, then metal liquid is poured into the casting mould from the gate for condensation to finish the metal casting, when the wax is melted, the metal part of the gate rod is separated, the residual wax material is melted to form a casting system, however, when the casting is carried out, molten iron directly enters a casting mould through the gate rod, the molten iron is easy to generate a swirling phenomenon during casting, and the molten iron is easy to splash after swirling, and air can enter molten iron to generate bubbles, and the molten iron containing the air enters a casting mould, so that the quality of cast finished products is low easily.

SUMMERY OF THE UTILITY MODEL

In order to overcome not enough among the background art, the utility model discloses a sprue bar for investment casting is used for solving traditional through type sprue bar casting in-process, produces the molten iron easily and splashes, beat the condition of revolving, has improved the casting quality greatly.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a sprue bar for investment casting, include the runner piece of making by the wax material, casting tube and casting block, the funnel-shaped structure of runner piece, and be equipped with the arc on its inclined plane sunken, runner piece upper portion is equipped with the guide arm, runner piece lower part is equipped with the casting tube of back taper structure, the casting tube outer wall is equipped with and is spiral helicine bead, the casting tube lower part is equipped with the casting block, the runner piece, casting tube and casting block form the runner respectively after processing melt wax processing, casting runner and buffer casting chamber, the runner, the cooperation of casting runner and buffer casting chamber forms the casting runner that is used for casting the molten iron, wherein the slope inner wall of runner forms the slow flow slope that is used for carrying out buffer treatment to the molten iron through the arc is sunken, the inner wall of casting runner forms spiral chute through the bead.

Furthermore, the upside on gentle class slope is the buffer segment, and the downside on gentle class slope is the gentle class section, and the radian of buffer segment is greater than the radian of gentle class section.

Furthermore, the longitudinal section of the gate block is of an inverted right-angled trapezoid structure.

Further, the diameter of the casting block is larger than the smallest diameter of the casting tube.

Furthermore, a baffle plate covering the upper end surface of the gate block is arranged on the rod body of the guide rod.

Furthermore, the upper end of the guide rod is provided with a hanging opening.

Compared with the prior art, the beneficial effects of the utility model are that: in the casting process of the molten iron, the molten iron is poured from the pouring gate inclined plane, and the molten iron can be subjected to buffering and speed reduction treatment through the slow flow slope on the inclined plane, so that the molten iron can flow into the pouring runner at a constant speed, and the swirling phenomenon of the molten iron in the pouring gate is reduced; the spiral launder on the inner surface of the casting runner can guide the molten steel in a cyclone state to generate larger vortex, thereby realizing the discharge of gas in the molten steel; the buffer casting cavity can buffer molten iron and slowly inject the molten iron into the casting mold, so that the casting quality is greatly improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the casting runner structure of the present invention;

fig. 3 is a schematic view of the structure of the gentle flow slope of the present invention.

In the figure: 1. a hoisting ring; 2. a guide bar; 3. a baffle plate; 4. a gate block; 5. sinking; 6. a casting tube; 7. a convex edge; 8. casting a block; 9. a gate; 10. a slow flow slope; 11. a spiral chute; 12. casting a runner; 13. caching the casting cavity; 14. a buffer section; 15. and a buffering section.

Detailed Description

In the following description, the technical solutions of the present invention will be described with reference to the drawings in the embodiments of the present invention, it should be understood that, if there are the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., it only corresponds to the drawings of the present invention, and for convenience of description, it is not intended to indicate or imply that the indicated device or element must have a specific orientation.

Referring to the attached drawings 1-3 of the specification, the utility model provides a technical scheme:

embodiment one, a gate stick for investment casting, comprising a gate block 4 made of wax, a casting pipe 6 and a gate block 8, the gate block 4 having a funnel-shaped structure, an arc-shaped recess 5 is arranged on the inclined plane of the pouring gate, a guide rod 2 is arranged on the upper part of the pouring gate block 4, the guide rod 2 is made of aluminum alloy, the lower end of the pouring block is in threaded fit with the upper end face of the pouring block 4, the lower part of the pouring block 4 is provided with a casting pipe 6 with an inverted cone structure, the outer wall of the casting pipe 6 is provided with a spiral convex edge 7, the lower part of the casting pipe 6 is provided with a casting block 8, the pouring block 4, the casting pipe 6 and the casting block 8 are arranged on the upper part of a casting mould to form a module, after the module is dipped with refractory paint and refractory sand, drying and curing, and then performing heating dewaxing treatment, wherein a pouring gate 9, a pouring runner 12 and a buffer pouring cavity 13 are respectively formed by the pouring gate block 4, the pouring pipe 6 and the pouring block 8, and wax materials are removed from the pouring gate 9 formed by drying refractory coating and refractory sand;

the inclined inner wall of the pouring gate 9 forms a slow flow slope 10 used for buffering molten iron through the arc-shaped recess 5, the upper side of the slow flow slope 10 is a buffer section 14, the lower side of the slow flow slope 10 is a slow flow section 15, and the radian of the buffer section 14 is larger than that of the slow flow section 15, so that in order to avoid the swirling phenomenon of the molten iron in the pouring gate 9 during molten iron casting, the longitudinal section of the pouring gate block 4 is of an inverted right trapezoid structure, the slow flow slope 10 is arranged on an inclined plane, molten iron is poured from the inclined plane of the pouring gate 9 during molten iron casting, the molten iron flows into the pouring gate 9 through the inclined plane, the flow speed of the molten iron is slowed down through the buffer of the buffer section 14, and then the molten iron is conveyed through the slow flow section 15 at a constant speed, so that the molten iron can slowly flow into the casting runner 12, and the swirling phenomenon during molten iron pouring is effectively reduced;

the inner wall of the casting runner 12 forms a spiral runner 11 through the convex edge 7, molten iron flows along the spiral runner 11 of the inner wall after flowing into the casting runner 12, the spiral runner 11 can guide the molten iron, so that gas generated by the molten iron in a cyclone state is reduced, the molten iron can generate vortex under the guide of the spiral runner 11, and the gas can be subjected to centrifugal force in the flowing process of the molten iron, so that the gas can be discharged along the spiral runner 11;

the molten iron casting runner 12 flows into the buffer casting cavity 13, and since the diameter of the casting block 8 is larger than the minimum diameter of the casting pipe 6, the inner diameter of the buffer casting cavity 13 is larger than the diameter of the casting runner 12, the molten iron is buffered in the buffer casting cavity 13 and is slowly poured into the casting mold.

Second embodiment, when carrying out dipping in of refractory coating and refractory sand to runner block 4, casting pipe 6 and casting block 8 and casting die utensil, in order to avoid it to cover at runner block 4 upper surface, influence the discharge of follow-up wax material, be equipped with the baffle 3 that covers at runner block 4 up end on the body of rod of guide arm 2, the diameter of baffle 3 is greater than the diameter of runner block 4 up end, for the ease of hanging runner block 4, casting pipe 6 and casting block 8 and casting die utensil, it facilitates to provide convenience for the sunning of follow-up refractory coating and refractory sand, guide arm 2 upper end is equipped with hanging opening 1.

The details of the present invention not described in detail are prior art, and it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the scope of the claims.

Claims (6)

1. A gate stick for investment casting is characterized in that: the casting device comprises a sprue block (4) made of wax materials, a casting pipe (6) and a casting block (8), wherein the sprue block (4) is of a funnel-shaped structure, an arc-shaped recess (5) is formed in the inclined plane of the sprue block, a guide rod (2) is arranged on the upper portion of the sprue block (4), the casting pipe (6) of an inverted cone-shaped structure is arranged on the lower portion of the sprue block (4), a spiral convex rib (7) is arranged on the outer wall of the casting pipe (6), a casting block (8) is arranged on the lower portion of the casting pipe (6), the sprue block (4), the casting pipe (6) and the casting block (8) are respectively formed into a sprue (9), a casting runner (12) and a buffer casting cavity (13) after being processed and melted with wax, the sprue (9), the casting runner (12) and the buffer casting cavity (13) are matched to form a casting runner for casting molten iron, a slow flow slope (10) for buffering the molten iron is formed on the inclined inner wall of the sprue (9) through the arc-shaped recess (5), the inner wall of the casting runner (12) forms a spiral runner (11) through a convex rib (7).

2. The gate stick for investment casting of claim 1, wherein: the upper side of the slow flow slope (10) is provided with a buffer section (14), the lower side of the slow flow slope (10) is provided with a slow flow section (15), and the radian of the buffer section (14) is greater than that of the slow flow section (15).

3. The gate stick for investment casting of claim 1, wherein: the longitudinal section of the gate block (4) is of an inverted right-angled trapezoid structure.

4. The gate stick for investment casting of claim 1, wherein: the diameter of the casting block (8) is greater than the smallest diameter of the casting tube (6).

5. The gate stick for investment casting of claim 1, wherein: the rod body of the guide rod (2) is provided with a baffle (3) which covers the upper end surface of the gate block (4).

6. The gate stick for investment casting of claim 1, wherein: the upper end of the guide rod (2) is provided with a hanging opening (1).

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