CN212469647U

CN212469647U - Film-coated sand mold and molding base mold thereof

Info

Publication number: CN212469647U
Application number: CN202020657966.3U
Authority: CN
Inventors: 胡忠发; 胡适
Original assignee: Huangshan Zhongfa Wear Resistant Material Co ltd
Current assignee: Huangshan Zhongfa wear resistant material technology Co.,Ltd.
Priority date: 2020-04-25
Filing date: 2020-04-25
Publication date: 2021-02-05
Anticipated expiration: 2030-04-25

Abstract

The utility model provides a tectorial membrane sand mould and shaping basic mold of production alloy steel ball, the tectorial membrane sand mould includes sand mould unit mould, and sand mould unit mould comprises two tectorial membrane sand mould unit boards that the face was laminated each other, and one side face that tectorial membrane sand mould unit board was laminated each other gathers the shaping cavity and constitutes the concave part of main runner, and shaping cavity encloses into ellipsoid or olive type die cavity when laminating including two tectorial membrane sand mould unit boards, and the die cavity communicates with main runner, and there is the logical liquid way of casting liquid in the direction about and/or about the die cavity of adjacent ellipsoid or olive type to communicate each other; the base mold is a mold for molding the coated sand mold. The cavity is designed into an ellipsoid or olive-shaped cavity, so that the corresponding ellipsoid or olive-shaped alloy steel ball is guaranteed to be cast and produced, the ball has excellent crushing and grinding effects when used in crushing operation, and the crushing and grinding efficiency is remarkably improved compared with that of the existing round steel ball and steel forging.

Description

Film-coated sand mold and molding base mold thereof

Technical Field

The utility model belongs to tectorial membrane sand casting field, concretely relates to tectorial membrane sand mould for producing microballon.

Background

At present, the traditional film-covered sand mold casting for producing micro parts such as microspheres mainly adopts a sand-buried pouring mode; the method comprises the steps of firstly manufacturing a film-coated sand mold (namely a core mold) serving as a product cavity, wherein the film-coated sand mold (namely the core mold) is of a plate-shaped structure which is opposite up and down, semicircular cavities a are densely distributed on one side plate surface of the film-coated sand mold, the upper plate and the lower plate of the film-coated sand mold are closed to form a plurality of spherical cavities, and molten steel runners c which are connected with each other and used for connecting a main runner b are arranged among the semicircular cavities a, see the applicant's utility model patent (patent number 201310275697.9) named as film-coated sand mold negative pressure pouring method and pouring system, and then burying a film-coated sand mold; when pouring, the molten steel enters the main pouring gate b, and then flows into each spherical cavity through the molten steel runner c, the common sand correspondingly ensures the auxiliary shaping pouring and heat preservation operation of the core mould, and finally the high precision of the cavity of the core mould and the heat preservation shaping function of the common sand are utilized, so that the requirement of high product quality is met.

The microspheres produced by the prior art are round spheres, and the efficiency of grinding and crushing materials is specific due to the limitation of the shape of the round spheres, namely the efficiency of crushing materials by the round microspheres is limited by the characteristic that the contact probability of the surfaces of the spheres is basically determined.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a tectorial membrane sand mould of production olive shape microballon. In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a tectorial membrane sand mould, includes sand mould unit mould, and sand mould unit mould comprises two tectorial membrane sand mould cell boards that the face was laminated each other, and one side face that tectorial membrane sand mould cell board was laminated each other is densely covered the shaping cavity and is constituted the main recessed part of watering, its characterized in that: when the two film-coated sand mold unit plates are attached, the molding concave cavity is encircled to form an ellipsoidal or olive-shaped cavity, the cavity is communicated with the main pouring gate, and liquid passages for casting liquid are arranged in the vertical direction and/or the horizontal direction of the adjacent ellipsoidal or olive-shaped cavities and are communicated with each other.

In the scheme, the cavity is designed into an ellipsoid or olive-shaped cavity, so that the corresponding ellipsoid or olive-shaped microspheres are guaranteed to be cast and produced, the microspheres in the shape have excellent crushing and grinding effects when used in crushing operation, and the crushing and grinding efficiency of the existing round microspheres is remarkably improved.

Another object of the present invention is to provide a molding base mold for preparing the above-mentioned coated sand mold.

The specific technical scheme is as follows: the utility model provides a shaping basic mode of shaping tectorial membrane sand mould which characterized in that: the base mould shaping surface is provided with a bulge used for shaping a cavity on a laminating sand mould unit plate and a convex strip of a shaping main pouring gate, the shape of the outline of the convex surface conforms to the curved surface of a half body of a long shaft parting surface or a half body of a half shaft and a half body of a half shaft perpendicular to the long shaft, the convex bottoms of the convex adjacent ellipsoids or olive shapes are connected by a thin rib, the thin rib is used for a liquid passage of casting liquid in the vertical direction and/or the left-right direction of the shaping cavity, and through holes for ejecting a mould rod are distributed on the shaping surface of the base mould.

The bulge on the base die is used for correspondingly forming a cavity, namely a forming cavity on the film-coated sand mold unit plate, and smooth demolding needs to be ensured because the forming cavity on the film-coated sand mold unit plate ensures that the rest base dies are still intact after being separated.

Drawings

Fig. 1 and 4 are schematic front views of molding surfaces of a first embodiment and a second embodiment of a film-coated sand mold unit plate of the invention respectively;

FIGS. 2 and 5 are partial enlarged views of section I in FIGS. 1 and 4, respectively;

FIGS. 3 and 6 are sectional views A-A of FIGS. 1 and 4, respectively;

FIGS. 7 and 10 are schematic front views of molding surfaces of first and second embodiments of a base mold for molding a coated sand mold according to the present invention;

FIGS. 8 and 11 are partial enlarged views of the section I in FIGS. 7 and 10, respectively;

fig. 9 and 12 are sectional views a-a in fig. 7 and 10, respectively.

Detailed Description

Example 1

The utility model provides a tectorial membrane sand mould, includes sand mould unit mould, and two tectorial membrane sand mould cell boards 10 that sand mould unit mould was laminated each other by the face constitute, and one side face densely covered shaping cavity 11 that tectorial membrane sand mould cell board 10 laminated each other and the concave part that constitutes the main runner, its characterized in that: when the two film-coated sand mold unit plates 10 are attached, the molding cavity 11 encloses to form an ellipsoidal or olive-shaped cavity, the cavity is communicated with the main pouring gate, and liquid passages for casting liquid are arranged in the vertical direction and/or the horizontal direction of the adjacent ellipsoidal or olive-shaped cavities and are communicated with each other.

The film-coated sand mold unit plate 10 provided by the scheme is formed into a unit mold by two pieces of lamination, the forming concave cavities 11 on the two film-coated sand mold unit plates 10 are enclosed to form an ellipsoidal or olivary cavity, and the casting liquid is solidified to obtain ellipsoidal or olivary steel microspheres. During concrete pouring, according to the size and the volume of the sand box, dozens of groups of unit molds are clamped together by a clamp to form a mold cluster, a plurality of clusters of molds are embedded in the sand box to carry out vacuum pouring, and the specific pouring method can refer to the technical content disclosed by the related lost foam vacuum pouring system of the applicant's prior application.

In view of the particularity of the shape of the product to be produced, namely the rugby-shaped wear-resistant microspheres, how to form the cavity is an extremely important technical difficulty, the utility model discloses a preferred scheme has two kinds:

one is that the molding cavity 11 is a hemispherical cavity, and the parting surface of the hemispherical cavity is coplanar with the long axis of the ellipsoid or the olive. It can also be stated that the surface of the mouth of the shaped cavity 11 is coplanar with the major axis of the ellipsoid or olive, or that the cavity of the ellipsoid or olive is divided by a section chosen to be coplanar with the major axis of the ellipsoid or olive. The scheme has three realization modes, namely, the forming concave cavity (11) is positioned in the horizontal direction according to the long axis of the ellipsoid or the olive; the molding concave cavity (11) is arranged in the vertical direction according to the long axis of the ellipsoid or the olive; thirdly, the molding cavity (11) is in a combined mode of horizontal direction and vertical direction according to the long axis of the ellipsoid or the olive.

And the other is that the molding cavity 11 is a hemispherical cavity, and the parting surface of the hemispherical cavity is coplanar with the surface of the ellipsoidal or olive-shaped short shaft. This can also be understood as meaning that the surface of the mouth of the shaped cavity 11 is coplanar with the surface of the minor axis of the ellipsoid or olive, or that the cavity of the ellipsoid or olive is divided by a tangent plane selected to be coplanar with the surface of the minor axis of the ellipsoid or olive.

The two schemes are both used for obtaining the half-body-shaped forming cavities 11 symmetrically divided into an ellipsoid shape or an olive shape, the two forming cavities 11 are enclosed to obtain a product to be formed, the shape of which is the ellipsoid shape or the olive shape, and meanwhile, the forming cavities 11 are arranged by adopting the schemes to be favorable for mutually demoulding with a forming base die for preparing the film-coated sand mold unit plate 10. The above two modes are respectively embodied by the following two examples.

As shown in fig. 1, 2 and 3, a main runner 12 is arranged at the central position of the upper part of the coated sand mold unit plate 10, the main runner 12 extends towards the left side and the right side to form a cross runner 13, a plurality of rows of molding cavities 11 are arranged below the cross runner 13, the molding cavities 11 in each row are communicated with each other through liquid passages 14 from top to bottom, and the liquid passages 14 are arranged between the uppermost molding cavities 11 and the cross runner 13.

The molded concave cavities 11 are arranged horizontally and/or vertically according to the major axis of the ellipsoid or the olive. Fig. 1, 2 and 3 show examples in which the long axis of the molding cavity 11 is arranged in the vertical direction. The pouring liquid arriving at the runner 13 from the main runner 12 is rapidly filled into each row of molding cavities 11 through a liquid passage 14 arranged between the molding cavities 11 and the runner 13, and fills each molding cavity 11 in each row of molding cavities 11 from top to bottom.

The scheme for communicating the casting liquid is adopted, because the long axis direction of the molding cavities 11 is vertical after the vertical size of the plate surface is limited, and the number of the molding cavities 11 correspondingly arranged is small, the communication of the molding cavities 11 in the same row in the vertical direction is beneficial to the rapid arrival of the casting liquid at each molding cavity 11, the flow of the casting liquid is rapid, and the mold filling rate is high.

As shown in fig. 4, 5 and 6, the central position of the upper part of the film-coated sand mold unit board 10 is provided with a main pouring gate 12, the main pouring gate 12 extends towards the left side and the right side to form a horizontal pouring gate 13, the horizontal pouring gate 13 is connected with vertical pouring gates 15 at intervals, matrix-type molding cavities 11 are arranged between the vertical pouring gates 15, the vertical pouring gates 15 are communicated with the molding cavities 11 arranged in the close vicinity of the vertical pouring gates by liquid passing channels 14, and the left side and the right side of the molding cavities 11 arranged in the horizontal direction are communicated with the. The arrangement mode that the vertical pouring gate 15 drains pouring liquid is adopted, in the scheme, the parting surface of a hemispherical cavity forming the forming concave cavity 11 is coplanar with the surface of an ellipsoidal or olive-shaped short shaft, the long shaft in the scheme is perpendicular to the plate surface of the film-coated sand mold unit plate 10, if microspheres with the same size are produced, compared with the examples in the figures 1, 2 and 3, the thickness requirement of the film-coated sand mold unit plate 10 is slightly larger than that of the schemes in the figures 1, 2 and 3, and in addition, a large number of forming concave cavities 11 can be arranged under the condition that the plate surfaces are the same in size. Therefore, both of the above-mentioned schemes have respective advantages. It should be noted that the

runners

13, 15 and the main runner 12 are all the main flow paths for the casting liquid, and are to be understood in upstream and downstream relationship to each other.

Example 2

Example 1 has described in great detail a coated sand mold for the production of oval or rugby shaped, abrasion resistant microspheres. The molding base mold according to the technical scheme disclosed in the embodiment 2 is used for preparing the coated sand mold.

As shown in fig. 10 to 12, a forming surface of the base mold 20 is provided with a protrusion 21 for forming a forming cavity 11 on the coated sand mold unit plate 10 and a convex strip 22 for forming a main runner, the surface contour shape of the protrusion 21 conforms to the curved surface of a half body passing through an ellipsoidal or olive-shaped long axis parting surface or a short axis and perpendicular to the long axis parting surface, the bottoms of adjacent protrusions 21 are connected by a thin rib 23, the thin rib 23 is used for forming a casting liquid passage in the up-down direction and/or left-right direction of the forming cavity 11, and through holes 24 for ejecting a mold ejection rod are distributed on the forming surface of the base mold 20.

It should be noted that, when the base mold 20 forms the coated sand mold unit plate 10, the plate surface of the base mold 20 is horizontally disposed, and when the sand mold unit mold formed by the coated sand mold unit plate 10 performs microsphere casting, the plate surface of the sand mold unit mold is vertically disposed, so that the casting liquid passage on the sand mold unit mold is vertically or horizontally disposed.

One of the preferred embodiments is that the projections 21 are arranged such that the major axis of the ellipsoid or olive is perpendicular to the face of the base mold 20, and the outer contour of the projections 21 is a hemisphere conforming to the half of the cross-ellipsoid or olive major axis parting plane.

The second is that the bulges 21 are arranged in a manner that the long axis of the ellipsoid or the olive is overlapped with the surface of the base die 20, and the external outline of the bulges 21 is in a hemispherical shape which is matched with the half body of the parting surface which is too short and is vertical to the long axis.

The shape of the projections 21 in both of the above embodiments is understood as being understood from embodiment 1, i.e. the shape of the projections 21 corresponds to the shape of the outer surface of the outer hemisphere divided by a tangent plane, the major axis of the ellipsoid or olive remains coplanar with the tangent plane, or the plane of the minor axis of the ellipsoid or olive remains coplanar with the tangent plane. By adopting the scheme, the smooth demoulding of the film-coated sand mold from the molding base mold can be ensured, and the molding cavity 11 is ensured to be intact.

Claims

1. The utility model provides a tectorial membrane sand mould, includes sand mould unit mould, and two tectorial membrane sand mould cell boards (10) that sand mould unit mould was laminated each other by the face constitute, and one side face that tectorial membrane sand mould cell board (10) laminated each other is densely covered shaping cavity (11) and constitutes the concave part of main watering, its characterized in that: when the two film-coated sand mold unit plates (10) are attached, the molding concave cavities (11) are enclosed to form ellipsoidal or olive-shaped cavities, the cavities are communicated with the main pouring gate, and liquid passages for casting liquid are arranged in the vertical direction and/or the horizontal direction of the adjacent ellipsoidal or olive-shaped cavities and are communicated with each other;

there is main runner (12) in tectorial membrane sand mould cell board (10) upper portion position in the middle of the department, and extend to the left and right sides from main runner (12) and constitute horizontal runner (13), and a plurality of rows of shaping cavity (11) are arranged to horizontal runner (13) below, and shaping cavity (11) in every row have between shaping cavity (11) and horizontal runner (13) that leads to liquid way (14) intercommunication and the top is equipped with between the shaping cavity (11) and the horizontal runner (13) that lead to the liquid way (14) intercommunication.

2. A coated sand mold according to claim 1, characterized in that: the molding cavity (11) is a hemispherical cavity, and the parting surface of the hemispherical cavity is coplanar with the long axis of the ellipsoid or the olive.

3. A coated sand mold according to claim 1, characterized in that: the molding cavity (11) is a hemispherical cavity, and the parting surface of the hemispherical cavity is coplanar with the surface where the ellipsoidal or olive-shaped short shaft is located.

4. The coated sand mold according to claim 2, characterized in that: the molding cavities (11) are arranged horizontally and/or vertically according to the major axis of the ellipsoid or the olive.

5. The coated sand mold according to claim 1 or 3, characterized in that: tectorial membrane sand mould cell board (10) upper portion position between two parties department has main runner (12), and main runner (12) extend to the left and right sides and constitute horizontal runner (13), and horizontal runner (13) interval connection has vertical runner (15), has arranged the shaping cavity (11) of matrix between vertical runner (15), and vertical runner (15) are by leading to liquid way (14) intercommunication rather than shaping cavity (11) that the next-door neighbour arranged, control to shaping cavity (11) of arranging by leading to liquid way (14) horizontal intercommunication.

6. A molding base mold for molding the coated sand mold according to any one of claims 1 to 5, characterized in that: the forming surface of the base die (20) is provided with a bulge (21) and a convex strip (22) of a forming main pouring gate, wherein the bulge (21) is used for forming a forming cavity (11) in the film-coated sand mold unit plate (10), the surface outline shape of the bulge (21) is matched with the curved surface of a half body passing through an ellipsoidal or olive-shaped long shaft parting surface or a too short shaft and perpendicular to the long shaft parting surface, the bottoms of the ellipsoidal or olive-shaped bulges (21) adjacent to the bulge (21) are connected by a thin rib (23), the thin rib (23) is used for forming a liquid passage channel (14) of casting liquid in the vertical direction and/or the left-right direction of the forming cavity (11), and the forming surface of the base die (20) is provided with through holes (24) for ejecting a die rod.

7. The molding base mold of a coated sand mold according to claim 6, characterized in that: the bulges (21) are arranged in a manner that the long axis of an ellipsoid or an olive shape is superposed with the molding surface of the base mold (20), and the external outline of the bulges (21) is in a hemispherical shape which is matched with a half body of a parting surface which is too short and vertical to the long axis.

8. The molding base mold of a coated sand mold according to claim 7, characterized in that: the bulges (21) are arranged in a mode that the long axis of the ellipsoid or the olive is vertical to the forming surface of the base die (20), and the external outline of the bulges (21) is in a hemispherical shape which is matched with a half body of the cross-ellipsoid or the olive-shaped long axis parting surface.