Lower sand box structure with sealing ring

Abstract

The utility model discloses a drag flask structure with a sealing ring, and relates to the field of molding machines, a box body is internally provided with a pressing plate capable of moving up and down, and a driving oil cylinder for driving the pressing plate to move up and down is arranged below the pressing plate; a plurality of pressure relief holes are formed in the periphery of the box body, an annular fixing groove is formed in the periphery of the pressing plate, a connecting piece and an elastic sealing ring are installed in the fixing groove, the elastic sealing ring is installed on the connecting piece in a nested mode, an inflation inner pipe is further arranged on the connecting piece, an inflation valve is arranged on the pressing plate, and the inflation valve is communicated with the inflation inner pipe. When air enters the inflation valve, the elastic sealing ring expands to fill a gap between the pressing plate and the inner side wall of the box body. According to the pressing plate adopting the elastic sealing ring, after the elastic sealing ring is inflated and expanded, the gap between the pressing plate and the inner side wall of the box body can be completely filled, falling sand grains are effectively prevented from entering the gap, the pressing plate does not directly rub with the sand grains and the inner side wall of the box body in the ascending process, damage to the inner side wall of the box body is reduced, and the service life is longer.

Description

Technical Field

[0001] The utility model relates to the field of molding machines, in particular to a lower sand box structure with a sealing ring. Background Art

[0002] Existing molding machines are commonly used for sand mold production in metal casting. Upper-pressure molding machines apply pressure via the upper mold plate to fill the mold with sand, maintaining a constant pressure during the filling process. This method is suitable for producing larger, more complex sand molds, providing a high filling density and excellent surface quality. Upper-lower simultaneous-pressure molding machines use impact and vibration forces from both the upper and lower mold plates during the filling process to fill the sand into the mold. This method is suitable for producing smaller, simpler sand molds, providing better filling uniformity and higher production efficiency.

[0003] Top-pressure molding machines are suitable for making larger and more complex sand molds, but their efficiency is lower. Simultaneous top-and-bottom pressure molding machines offer better filling uniformity and are suitable for making sand molds that require uniform filling. They also offer higher production efficiency and are suitable for making large batches of sand molds. They are also suitable for making smaller and simpler sand molds.

[0004] However, due to the gravity of the sand particles, the sand particles can easily fall into the gap between the pressure plate and the lower flask, causing the pressure plate to move unsmoothly and thus causing malfunctions. Furthermore, since the sand particles are shot into the lower flask from the bottom up, if the lower flask is not depressurized in time, the sand particles will not be able to effectively enter the lower flask and complete the sand shooting operation due to gravity and pressure differences. Furthermore, after the sand mold is made, a lot of sand particles will adhere to the surface of the lower flask. If not cleaned in time, it will affect the production of the next sand mold. Therefore, the market is in urgent need of a lower flask structure that can operate effectively and stably. Utility Model Content

[0005] In view of the above problems, the utility model aims to provide a lower sand box structure with a sealing ring.

[0006] To achieve this technical purpose, the solution of the utility model is: a lower sand box structure with a sealing ring, comprising a box body mounted on a fixed frame, a pressing plate that can move up and down is provided in the box body, and a driving cylinder for driving the pressing plate to move up and down is provided under the pressing plate;

[0007] The box body is provided with a plurality of pressure relief holes around it, and the pressure plate is provided with an annular fixing groove around it, and a connecting piece and an elastic sealing ring are installed in the fixing groove, and the elastic sealing ring is nested and installed on the connecting piece, and an inflation inner tube is also provided on the connecting piece, and an inflation valve is provided on the pressure plate, and the inflation valve is connected to the inflation inner tube. When air is admitted to the inflation valve, the elastic sealing ring expands to fill the gap between the pressure plate and the inner wall of the box body;

[0008] The fixing frame is also provided with a pushing cylinder, which is drive-connected to the box body. Auxiliary wheels are provided at the bottom of the box body. A support frame is also provided on one side of the fixing frame. A track matching the auxiliary wheels is provided on the support frame. The pushing cylinder can drive the box body to slide along the track to above the support frame.

[0009] Preferably, four sliding sleeves for vertical movement are provided around the fixing frame.

[0010] Preferably, there are four auxiliary wheels at the bottom of the box, two support frames are provided on one side of the fixing frame, and a track is provided on each support frame, and the bottom position height of the auxiliary wheels corresponds to the position height above the track;

[0011] The top cross section of the track is a circular structure, and the auxiliary wheel is provided with an arc-shaped groove structure matching the track.

[0012] Preferably, two positioning rods are further provided on the top of the box body, and the positioning rods are diagonally arranged above the box body.

[0013] Preferably, reinforcing wing plates are provided around the box body, and supporting wing plates are also provided below the support frame.

[0014] Preferably, the fixing frame is further provided with a support column and a limit column. When the box is in the initial state and is located directly above the support column, the support column can abut against the bottom of the box, and the limit column can abut against the side of the auxiliary wheel.

[0015] The beneficial effect of the present invention is that the box of the present application can slide out from the support column through the track, which is convenient for cleaning the residual sand on the inner wall of the box after use; at the same time, a pressure plate with an elastic sealing ring is adopted, and when the elastic sealing ring is inflated, the gap between the pressure plate and the inner wall of the box can be completely filled, effectively preventing the falling sand from entering the gap, and the pressure plate will not directly rub against the sand and the inner wall of the box during the rising process, thereby reducing damage to the inner wall of the box, extending the service life and reducing the failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the bottom view of the utility model;

[0018] Figure 3 It is a side view of the utility model;

[0019] Figure 4 It is a cross-sectional view of the utility model;

[0020] Figure 5 It is a schematic diagram of the local structure of the utility model. DETAILED DESCRIPTION

[0021] The utility model of this application is further described in detail below with reference to the accompanying drawings and specific embodiments. In order to clearly and completely describe the technical solution, the following embodiments are selected for illustration; other embodiments obtained based on the content recorded in this application without creative work are all within the scope of protection of this utility model.

[0022] In the following embodiments, it should be noted that the terms "up", "down", "left", "right", "inside", "outside", "top / bottom" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of clearly describing the present embodiment, and do not indicate or imply that the device or element referred to must have a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0023] like Figure 1-5 As shown, the specific embodiment of the utility model is a lower sand box structure with a sealing ring, comprising a fixed frame 1 that can move up and down and a box body 2 that can move horizontally relative to the fixed frame 1, wherein a pressing plate 3 that can move up and down is provided in the box body 2, and a driving cylinder 16 for driving the pressing plate 3 to move up and down is connected below the pressing plate 3;

[0024] A plurality of pressure relief holes 4 are provided on the side walls around the box body 2, and a fixing groove 301 with an annular concave structure is provided around the pressure plate 3. A connecting piece 302 and an inflatable U-shaped elastic sealing ring 5 are installed in the fixing groove 301. One end of the elastic sealing ring 5 can be installed on the connecting piece 302 to form a nested connection. A hollow inflatable inner tube 303 is provided in the connecting piece 302. An inflatable valve 6 is connected to the pressure plate 3, and the inflatable valve 6 can be connected to the inflatable inner tube 303. When air is pumped into the inflatable valve 6 through the air pump, the elastic sealing ring 5 expands in volume under the action of the air pressure and completely fills the gap between the pressure plate 3 and the inner wall of the box body 2;

[0025] The fixed frame 1 is also provided with a push-out cylinder 7 for the horizontal movement of the box body 2. The push-out cylinder 7 can be connected to the box body 2 by driving. Four auxiliary wheels 8 are provided at the bottom of the box body 2. A support frame 9 is also installed on one side of the fixed frame 1. The support frame 9 is provided with a track 10 matching the auxiliary wheels. The push-out cylinder 7 can drive the box body 2 to slide along the track 10 to the top of the support frame 9.

[0026] In order to facilitate the lifting operation of the fixed frame, four sliding sleeves 11 for vertical movement are installed around the fixed frame 1. The sliding sleeves can be driven to slide up and down along the slide rod by a hydraulic device.

[0027] In order to facilitate the stable sliding out of the box, there are four auxiliary wheels 8 at the bottom of the box 2, and two support frames 9 are installed on one side of the fixed frame 1. A track 10 is installed on each support frame 9. The bottom position height of the auxiliary wheel 8 corresponds to the position height above the track 10; the top cross-section of the track 10 is a circular structure, and the auxiliary wheel 8 is installed with an arc-shaped groove structure that matches the track 10.

[0028] In order to facilitate the corresponding connection between the box body below and the medium sand box, two positioning rods 12 are also installed on the top of the box body 2. The positioning rods 12 are diagonally installed above the box body 2. The positioning rods can avoid inaccurate docking, which may cause air leakage or sand mold deviation.

[0029] In order to enhance the stability of the box body and the support frame, reinforcing wing plates 13 are provided around the box body 2, and supporting wing plates 14 are provided under the support frame 9. Since the box body 2 is heavy, the supporting wing plates can provide good support.

[0030] To effectively support and limit the box, the fixed frame 1 is also provided with a support column 101 and a limit column 102. When the box 2 is in its initial state and directly above the support column 101, the support column 101 can abut against the bottom of the box 2, and the limit column 102 can abut against the side of the auxiliary wheel 8. The support column 101 is also provided with a position sensor 15.

[0031] The box of the present application can slide out from the support column through the track, which is convenient for cleaning the residual sand on the inner wall of the box after use; at the same time, a pressure plate with an elastic sealing ring is used. When the elastic sealing ring is inflated, the gap between the pressure plate and the inner wall of the box can be completely filled, effectively preventing the falling sand from entering the gap. The pressure plate will not directly rub against the sand and the inner wall of the box during the rising process, thereby reducing damage to the inner wall of the box, extending the service life and reducing the failure rate.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any minor modifications, equivalent replacements and improvements made to the above embodiments based on the technical essence of the present invention should be included in the scope of protection of the technical solution of the present invention.

Claims

1. A lower flask structure with a sealing ring, characterized in that: It comprises a box body mounted on a fixed frame, wherein a pressing plate capable of moving up and down is provided in the box body, and a driving oil cylinder for driving the pressing plate to move up and down is provided under the pressing plate; The box body is provided with a plurality of pressure relief holes around it, and the pressure plate is provided with an annular fixing groove around it, and a connecting piece and an elastic sealing ring are installed in the fixing groove, and the elastic sealing ring is nested and installed on the connecting piece, and an inflation inner tube is also provided on the connecting piece, and an inflation valve is provided on the pressure plate, and the inflation valve is connected to the inflation inner tube. When air is admitted to the inflation valve, the elastic sealing ring expands to fill the gap between the pressure plate and the inner wall of the box body; The fixing frame is also provided with a pushing cylinder, which is drive-connected to the box body. Auxiliary wheels are provided at the bottom of the box body. A support frame is also provided on one side of the fixing frame. A track matching the auxiliary wheels is provided on the support frame. The pushing cylinder can drive the box body to slide along the track to above the support frame.

2. The lower flask structure with a sealing ring according to claim 1, characterized in that: Four sliding sleeves for vertical movement are arranged around the fixing frame.

3. The lower flask structure with a sealing ring according to claim 1, characterized in that: There are four auxiliary wheels at the bottom of the box, two support frames are provided on one side of the fixing frame, and a track is provided on each support frame. The bottom position height of the auxiliary wheels corresponds to the position height above the track; The top cross section of the track is a circular structure, and the auxiliary wheel is provided with an arc-shaped groove structure matching the track.

4. The lower flask structure with a sealing ring according to claim 1, characterized in that: Two positioning rods are also provided on the top of the box body, and the positioning rods are diagonally arranged above the box body.

5. The lower flask structure with a sealing ring according to claim 1, characterized in that: Reinforcement wing plates are also provided around the box body, and support wing plates are also provided below the support frame.

6. The lower flask structure with a sealing ring according to claim 1, characterized in that: The fixing frame is also provided with a supporting column and a limiting column. When the box body is in the initial state and is located directly above the supporting column, the supporting column can abut against the bottom of the box body, and the limiting column can abut against the side of the auxiliary wheel.

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