Sealing structure of sand storage cylinder of up-down sand-shooting sand mold casting molding machine

Abstract

The utility model provides a sealing structure of a sand storage cylinder of an up-down sand-shooting sand mold casting molding machine, and belongs to the technical field of casting equipment. Comprising a sand storage outer box, a sand inlet is formed in the top of the sand storage outer box, a sand inlet pipeline communicated with the sand inlet is connected to the top of the sand storage box, a sand inlet hopper is connected to the top of the sand inlet pipeline, a containing box is integrally connected to the side wall of the sand inlet pipeline, and a movable frame is arranged in the containing box; the containing box is provided with a first driving part used for driving the movable frame to move into / out of the sand inlet pipeline, the movable frame is provided with a cover plate, and the movable frame is provided with a second driving part used for driving the cover plate to ascend and descend so as to cooperatively close the bottom opening of the sand inlet hopper. The sand inlet hopper is blocked from bottom to top through the cover plate, when molding sand is injected into the sand storage outer box in a pressurized mode, the sealing effect on the lower portion of the sand inlet hopper can be effectively kept, and the advantage of improving the sealing effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to casting equipment technical field especially relates to a kind of sealing structure of sand casting molding machine sand storage cylinder of up and down sand shooting sand mould. BACKGROUND

[0002] Sand casting refers to the internal cavity of the same shape of the part with the sand mould made of sand mould, the molten metal liquid is injected into the cavity, and the casting method is formed after the metal liquid cools and solidifies to form casting, the material for manufacturing sand mould is called molding material, the material for manufacturing sand mould is called sand mould, and the basic raw material of sand mould is casting sand and sand mould binder, the most commonly used casting sand is siliceous sand, and when the high-temperature performance of silica sand cannot meet the use requirement, zircon sand, chromite sand, corundum sand and other special sand are used. In the process of sand casting, molding machine can be used, sand mould can be automatically injected into mould, and sand mould is formed on the surface of part mould by extrusion under pressure.

[0003] Patent with announcement number CN110385405B discloses a kind of double sand barrel type full-automatic sand mould casting molding machine, including rack, two sand barrels being set on rack, four guide columns being set on rack, first mounting seat, second mounting seat and third mounting seat being slidably connected with four guide columns, upper auxiliary box being set on first mounting seat, auxiliary box being set on second mounting seat, lower gas storage being set on third mounting seat, lower auxiliary box being set above lower gas storage, mould plate support being set on one side of rack.

[0004] In order to spray sand mould into sand mould, the barrel cover is usually inflated during the spraying process, and the sand mould is sprayed out of the sand storage cylinder by means of air pressure, therefore, a sand storage cylinder sealing structure with excellent sealing performance is needed to maintain the spraying effect of sand mould. UTILITY MODEL CONTENTS

[0005] In view of the above problems, the utility model provides a kind of sealing structure of sand casting molding machine sand storage cylinder of up and down sand shooting sand mould.

[0006] In order to achieve the above invention purpose, the utility model adopts the technical scheme as follows:

[0007] A kind of sealing structure of sand casting molding machine sand storage cylinder of up and down sand shooting sand mould is provided, including sand storage outer box, sand storage outer box top is provided with sand inlet, sand storage tank top is connected with the sand inlet communication sand inlet pipeline, sand inlet pipeline side wall is integrally connected with the receiving box, receiving box is provided with moving frame, receiving box is provided with the first driving part for driving moving frame to move in / out sand inlet pipeline, moving frame is provided with cover plate, moving frame is provided with the second driving part for driving cover plate to move to close sand inlet pipeline top opening.

[0008] Further, the first driving member comprises a first electric push rod, the first electric push rod is fixedly arranged on the outer wall of the sand inlet pipeline, a piston rod of the first electric push rod extends into the sand inlet pipeline and is fixedly connected with the side wall of the moving frame, a sliding rail is arranged on the inner wall of the sand inlet pipeline, and the moving frame is slidably connected with the sliding rail.

[0009] Further, the second driving member comprises a second electric push rod, a mounting seat is hingedly arranged on the side wall of the moving frame, the second electric push rod is fixedly arranged on the mounting seat, the cover plate is vertically slidably arranged above the moving frame through a guide rod, a connecting rod is hingedly arranged on the moving frame, a moving seat is horizontally slidably arranged at the bottom of the cover plate, one end of the connecting rod is hingedly connected with the moving seat, and the other end of the connecting rod is hingedly connected with a movable end of the second electric push rod.

[0010] Further, the top end of the sand inlet pipeline is connected with a sand inlet hopper, the upper part of the sand inlet hopper is outwardly expanded, the bottom of the sand inlet hopper extends into the sand inlet pipeline, the opening size of the bottom of the sand inlet hopper is smaller than the inner diameter of the sand inlet pipeline, the edge of the top wall of the cover plate is provided with a sealing hopper, the sealing hopper is matched with the outer wall of the sand inlet hopper, and a sealing ring is arranged on the inner wall of the sealing hopper.

[0011] Further, the cover plate comprises a lifting plate and a sealing plate, the lifting plate is vertically connected with the moving frame through the guide rod, the moving seat is horizontally slidably arranged on the bottom wall of the lifting plate, the sealing plate is used for closing the bottom opening of the sand inlet hopper, a plurality of springs are arranged between the lifting plate and the sealing plate, and the springs are used for driving the sealing plate to move upward and away from the lifting plate.

[0012] The utility model discloses beneficial effects are: in the sealing process of sand inlet of sand storage outer box, moving frame is pushed to the below of sand inlet hopper, drives the cover plate to rise, makes the cover plate from below to upwards and closes the lower opening of sand inlet hopper, when the inside of sand storage outer box is pressurized and shoots the sand, can effectively keep the sealing effect of the lower opening of sand inlet hopper, has better sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the sealing structure's structural schematic view of sand storage cylinder of the embodiment of the application.

[0014] Figure 2 It is Figure 1 It is the enlarged schematic view of part A.

[0015] Wherein, 1, sand storage outer box;11, sand inlet;2, sand inlet pipeline;21, containing box;3, moving frame;31, mounting seat;4, cover plate;41, sealing hopper;42, sealing ring;43, lifting plate;431, moving seat;44, sealing plate;45, spring;5, first electric push rod;6, second electric push rod;7, connecting rod;8, sand inlet hopper. DETAILED DESCRIPTION

[0016] For better understanding of the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings of the specification and specific embodiments.

[0017] The application discloses a sealing structure of a sand storage cylinder of an up-and-down sand shooting sand mold casting molding machine. Figure 1 and Figure 2 The sealing structure comprises a sand storage outer box 1, a sand inlet 11 is formed in the top of the sand storage outer box 1, a sand inlet pipeline 2 is connected to the outer wall of the sand storage outer box 1 and communicates with the sand inlet 11, a containing box 21 is integrally connected to one side of the sand inlet pipeline 2, and an opening is formed in the side of the containing box 21 close to the sand inlet pipeline 2, so that the inside of the containing box 21 communicates with the sand inlet pipeline 2. A sliding rail is horizontally and fixedly arranged on the inner wall of the sand inlet pipeline 2 and the containing box 21 along the direction of the opening of the containing box 21, a moving frame 3 is slidingly installed on the sliding rail, a first driving member for driving the moving frame 3 to move into or out of the sand inlet pipeline 2 is arranged on the containing box 21, a cover plate 4 is arranged on the moving frame 3, and a second driving member for driving the cover plate 4 to move to close the top opening of the sand inlet pipeline 2 is arranged on the moving frame 3.

[0018] Specifically, the first driving member can be a first electric push rod 5, the first electric push rod 5 is fixedly installed on the outer wall of the sand inlet pipeline 2, the axis of the first electric push rod 5 is parallel to the sliding direction of the moving frame 3, the piston rod of the first electric push rod 5 extends into the sand inlet pipeline 2 and is fixedly connected with the side wall of the moving frame 3. The second driving member is a second electric push rod 6, a mounting seat 31 is hingedly installed on the side wall of the moving frame 3, the hinge shaft of the mounting seat 31 is horizontal, the second electric push rod 6 is fixedly arranged on the mounting seat 31, the cover plate 4 is vertically slidingly arranged above the moving frame 3 through a guide rod, a connecting rod 7 is hingedly arranged on the moving frame 3, a moving seat 431 is horizontally slidingly arranged at the bottom of the cover plate 4, one end of the connecting rod 7 is hingedly connected with the moving seat 431 and the other end is hingedly connected with the movable end of the second electric push rod 6. The hinge shaft on the connecting rod 7 is located between the hinge shaft of the moving seat 431 and the hinge shaft of the second electric push rod 6, the three hinge shafts on the connecting rod 7 are parallel to each other, the moving direction of the moving seat 431 is horizontal and perpendicular to the hinge shaft on the connecting rod 7, and in the process of driving the cover plate 4 to rise, the second electric push rod 6 pushes the bottom end of the connecting rod 7 to rotate through a dead point, so that the cover plate 4 is prevented from rotating back due to stress.

[0019] In the embodiment of the application, the top end of the sand inlet pipe 2 is connected with a sand inlet hopper 8, the upper part of the sand inlet hopper 8 is outwardly expanded, the bottom of the sand inlet hopper 8 extends into the sand inlet pipe 2, the opening size of the bottom of the sand inlet 11 is smaller than the inner diameter of the sand inlet pipe 2, the edge of the top wall of the cover plate 4 is provided with a sealing hopper 41 matched with the outer wall of the sand inlet hopper 8, and the inner wall of the sealing hopper 41 is provided with a sealing ring 42. In actual use, during the sand feeding process of the sand feeding outer box, the first electric push rod 5 drives the moving frame 3 to be accommodated into the accommodation box, the sand inlet 11 is left out, and the sand feeding outer box 1 can normally feed sand. After the sand feeding is completed, the moving frame 3 driven by the first electric push rod 5 moves to the lower part of the sand inlet hopper 8, the second electric push rod 6 drives the connecting rod 7 to rotate, so that the cover plate 4 is lifted to close the bottom of the sand inlet hopper 8. In the embodiment of the application, the sealing ring 42 can be a rubber ring, and the inner bottom wall of the sealing hopper 41 and the sand inlet hopper 8 are matched with each other, so that the contact surface of the sand during sealing can be effectively avoided, and the sealing effect between the sealing hopper 41 and the sand inlet hopper 8 is improved.

[0020] Further, the cover plate 4 comprises a lifting plate 43 and a sealing plate 44, the lifting plate 43 is vertically lifted and connected to the moving frame 3 through a guide rod, a moving seat 431 is horizontally slidably arranged on the bottom wall of the lifting plate 43, the sealing plate 44 is used for closing the bottom opening of the sand inlet hopper 8, a plurality of springs 45 are arranged between the lifting plate 43 and the sealing plate 44, and the springs 45 are used for driving the sealing plate 44 to move upward away from the lifting plate 43. By arranging the springs 45, the lifting plate 43 and the sealing plate 44 have lifting movement, and during the rotation of the connecting rod 7 through the dead point, the sealing state of the sand inlet hopper 8 can be always maintained, and the sealing effect is improved.

[0021] Those skilled in the art will appreciate that although the preferred embodiments of the present application have been described, once the basic creative concept is known, those skilled in the art can make other changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and changes of the present application fall within the scope of the claims of the present application and the equivalent technology, the present application also intends to include these changes and modifications.

Claims

1. A sealing structure for a sand storage cylinder of a top-and-bottom sand casting molding machine, characterized in that: The utility model provides a sand feeding device, which comprises a sand storage outer box (1), a sand feeding opening (11) is formed in the top of the sand storage outer box (1), a sand feeding pipeline (2) is connected to the top of the sand storage outer box and communicates with the sand feeding opening (11), a containing box (21) is integrally connected to the side wall of the sand feeding pipeline (2), a moving frame (3) is arranged in the containing box (21), a first driving element for driving the moving frame (3) to move in and out of the sand feeding pipeline (2) is arranged on the containing box (21), a cover plate (4) is arranged on the moving frame (3), and a second driving element for driving the cover plate (4) to move to close the top opening of the sand feeding pipeline (2) is arranged on the moving frame (3).

2. The sealing structure of a sand storage cylinder of an up-and-down sand-shooting sand mold casting molding machine according to claim 1, characterized in that, The first driving element comprises a first electric push rod (5), the first electric push rod (5) is fixedly arranged on the outer wall of the sand feeding pipeline (2), the piston rod of the first electric push rod (5) extends into the sand feeding pipeline (2) and is fixedly connected to the side wall of the moving frame (3), a sliding rail is arranged on the inner wall of the sand feeding pipeline (2), and the moving frame (3) is slidably connected to the sliding rail.

3. The sealing structure of a sand storage cylinder of an up-and-down sand-shooting sand mold casting molding machine according to claim 2, characterized in that, The second driving element comprises a second electric push rod (6), an installation seat (31) is hingedly arranged on the side wall of the moving frame (3), the second electric push rod (6) is fixedly arranged on the installation seat (31), the cover plate (4) is vertically slidably arranged above the moving frame (3) through a guide rod, a connecting rod (7) is hingedly arranged on the moving frame (3), a moving seat (431) is horizontally slidably arranged at the bottom of the cover plate (4), one end of the connecting rod (7) is hingedly connected to the moving seat (431), and the other end of the connecting rod (7) is hingedly connected to the movable end of the second electric push rod (6).

4. The sealing structure of a sand storage cylinder of an up-and-down sand-shooting sand mold casting molding machine according to claim 3, characterized in that, The top end of the sand feeding pipeline (2) is connected with a sand feeding hopper (8), the upper opening of the sand feeding hopper (8) is outwardly expanded upward, the bottom of the sand feeding hopper (8) extends into the sand feeding pipeline (2), the opening size at the bottom of the sand feeding opening (11) is smaller than the inner diameter of the sand feeding pipeline (2), the edge of the top wall of the cover plate (4) is provided with a sealing hopper (41), the sealing hopper (41) is matched with the outer wall of the sand feeding hopper (8), and a sealing ring (42) is arranged on the inner wall of the sealing hopper (41).

5. The sealing structure of a sand storage cylinder of an up-and-down sand-shooting sand mold casting molding machine according to claim 4, characterized in that, The cover plate (4) comprises a lifting plate (43) and a sealing plate (44), the lifting plate (43) is vertically connected to the moving frame (3) through a guide rod, the moving seat (431) is horizontally slidably arranged on the bottom wall of the lifting plate (43), the sealing plate (44) is used for closing the bottom opening of the sand feeding hopper (8), a plurality of springs (45) are arranged between the lifting plate (43) and the sealing plate (44), and the springs (45) are used for driving the sealing plate (44) to move upward away from the lifting plate (43).

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