Chassis limiting device for casting resin sand molding mold

Abstract

The invention discloses a casting resin sand molding mold underframe limiting device which comprises a placing area located on the ground, the outer side of the placing area is rotationally connected with a rotating ring through a plurality of supporting structures, the rotating ring is connected with a rotating driving device, and the outer side of the placing area is further provided with a plurality of limiting pressing rods capable of swinging towards the inner side of the placing area. The limiting pressing rods are arranged around the containing area, and the limiting pressing rods are connected with the rotating ring through connecting rod assemblies. The bottom frame limiting device for the casting resin sand molding mold is easy to operate, and the mold bottom frame can be rapidly limited.

Description

Technical Field

[0001] The invention relates to the field of casting resin sand molding molds, in particular to a casting resin sand molding mold chassis limiting device. Background Art

[0002] Resin sand casting is a casting process that mainly uses furan resin as a sand binder. The specific process is to mix raw sand with furan resin, curing agent, etc. in a certain proportion to form resin sand, and then make molds and cores. The mixed resin sand is filled into a sand box with a mold, and the resin is solidified by an irreversible cross-linking reaction through self-hardening or heating and blowing, giving the mold or sand core the required strength, and the boxes are combined to form a mold and a casting cavity. Finally, the molten metal is poured into the mold, and the casting is obtained after cooling and solidification, sand removal and cleaning.

[0003] At present, in the foundry industry, resin sand hand-made modeling generally uses wooden molds with base frames and sand boxes required for castings to make molds. After the resin sand mold is hardened, a crane is used to demould, that is, to separate the wooden mold with base frame from the mold (including the sand box). During the crane lifting process, due to the heavy weight, the resin sand mold and the wooden mold are tightly attached, and the wooden mold and the mold are often connected together and cannot be smoothly demoulded and separated. In order to solve the problem of not being able to demould and separate smoothly, the traditional method is to assist demoulding by manually knocking on the mold base frame during the hoisting and demoulding process, but this operation method will seriously damage the mold, and even cause the mold to separate from the base frame.

[0004] The patent with the publication number CN119187466A discloses a resin sand molding mold for large castings, including: a circular track, which is arranged on the ground and below the horizontal plane, and the inner enclosed area of ​​the circular track forms a placement station for placing the mold and the sand box; a positioning assembly, which is slidably arranged on the circular track; and a clamping assembly, which is arranged on the positioning assembly, and the positioning assembly is used to drive the clamping assembly to move above the lugs on the side of the mold, and the clamping assembly is used to press down the lugs of the mold to fix the mold. Although the above scheme can fix the lugs of the mold by the clamping assembly, due to the heavy weight of the mold, it is difficult to finely adjust the position of the mold and the direction of each lug when the mold is moved into the circular track by a crane. As a result, after the mold is placed, it is necessary to manually adjust the position of each clamping assembly to make it correspond to the lug of the mold, which is not only cumbersome to operate, but also has high labor costs and low efficiency. Summary of the invention

[0005] The invention aims to provide a casting resin sand molding mold chassis limiting device, which is simple to operate and can quickly limit the mold chassis.

[0006] To achieve the above-mentioned purpose, the present invention provides a casting resin sand molding mold chassis limit device, including a placement area located on the ground, the outer side of the placement area is rotatably connected to a rotating ring through multiple supporting structures, the rotating ring is connected to a rotating drive device, and the outer side of the placement area is also provided with multiple limit pressure rods that can swing toward the inner side of the placement area, each limit pressure rod is arranged around the placement area, and the limit pressure rod and the rotating ring are connected by a connecting rod assembly.

[0007] As a further improvement of the present invention, the placement area and the rotating ring are both circular and the centers of the two circles are located on the same axis.

[0008] As a further improvement of the present invention, the connecting rod assembly includes a first connecting rod, a second connecting rod and a column. The rotating ring, the first connecting rod and one end of the second connecting rod are rotationally connected in sequence. The middle part of the second connecting rod is rotationally connected to the column. The column is fixed relatively to the ground, and the other end of the second connecting rod is connected to one end of the limiting pressure rod.

[0009] As a further improvement of the present invention, the second connecting rod and the limiting pressure rod are rotationally connected via a rotating shaft, and a spring is also connected between the second connecting rod and the limiting pressure rod.

[0010] As a further improvement of the present invention, when each of the limiting pressure rods swings to the point where the front end of one of the two adjacent limiting pressure rods is adjacent to the rear end of the other, the distance between the two is less than 1 / 5 of the length of the limiting pressure rod.

[0011] As a further improvement of the present invention, each of the supporting structures includes a base fixed relatively to the ground, and an outer pressure wheel, an upper pressure wheel and a lower support wheel are rotatably connected to the base, the outer pressure wheel is in rolling contact with the outer side wall of the rotating ring, the upper pressure wheel is in rolling contact with the top surface of the rotating ring, and the lower support wheel is in rolling contact with the bottom surface of the rotating ring.

[0012] As a further improvement of the present invention, the rotary drive device is a telescopic drive mechanism, one end of which is rotatably connected to the ground through a fixed seat, and the other end of which is rotatably connected to a mounting portion fixed on a rotating ring.

[0013] Beneficial Effects

[0014] Compared with the prior art, the advantages of the base frame limiting device of the casting resin sand molding mold of the present invention are:

[0015] 1. After the casting mold (including the sand box) and the mold base frame with the wooden mold are hoisted to the placement area on the ground by a crane, the lugs around the mold base frame are all located in the placement area, and then the rotary drive device is started to rotate the rotating ring around the placement area. The rotating ring drives the limit pressure rod to swing from outside the placement area to inside the placement area through the connecting rod assembly, and at least a part of the limit pressure rod is moved to the top of each lug of the mold base frame. Then the sand box above the mold base frame is pulled up together with the resin sand casting mold in the sand box by a crane. During this process, the mold base frame will not be pulled up because the limit pressure rod limits the lugs of the mold base frame, and the wooden mold is connected and fixed to the mold base, so that the sand box and the resin sand casting mold can be demolded smoothly. In this process, there is no need for manual operation, nor is there a need to position the limit pressure rod and the lugs of the mold base one by one. The operation is simple, and the mold base frame can be quickly limited, greatly improving work efficiency.

[0016] 2. During the swinging process of each limit pressure rod into the placement area, even if a part of the limit pressure rod first contacts the side wall of the mold chassis, due to the compression capacity of the spring, the remaining limit pressure rods can further swing inward under the drive of the rotating ring and the connecting rod assembly until a part of the limit pressure rod moves to the top of the lug of each mold chassis to realize the limiting function. It can be seen that the arrangement of a spring between the second connecting rod and the limit pressure rod can reduce the situation where the lug of the mold chassis cannot be normally limited due to the interference between the limit pressure rod and the mold chassis. Even if the mold is not placed in the middle of the placement area, the success rate of the limit device limiting the mold chassis normally can be ensured, reducing the time for adjusting the mold placement position by the crane.

[0017] 3. When each limit pressure rod swings to the point where the front end of one of the two adjacent limit pressure rods is adjacent to the rear end of the other, the distance between the two is less than 1 / 5 of the length of the limit pressure rod. With this arrangement, even if the lug direction of the mold base is deflected, it can be ensured that the limit pressure rod has a high probability of swinging to the top of the lug to achieve limiting.

[0018] 4. The wheels of the supporting structure can ensure the smooth rotation of the rotating ring and prevent the rotating ring from being lifted up when the sand box is lifted up.

[0019] The present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, which are used to illustrate embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A top view of a mold base and lugs connected to a wooden mold;

[0022] Figure 2 One of the top views of the large-size mold chassis and the limit device;

[0023] Figure 3 The second top view of the large-size mold chassis and the limiting device;

[0024] Figure 4 It is a top view of the small-size mold chassis and the limiting device;

[0025] Figure 5 It is a top view of the limit pressure rod and the connecting rod assembly;

[0026] Figure 6 for Figure 3 Middle AA view;

[0027] Figure 7 is a side view of the connecting rod assembly;

[0028] Figure 8 Schematic diagram of the sand box being pulled up from the mold base. DETAILED DESCRIPTION

[0029] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0030] Example

[0031] The specific embodiments of the present invention are as follows Figures 1 to 8 As shown, a casting resin sand molding mold chassis limit device includes a placement area 7 located on the ground, the outer side of the placement area 7 is rotatably connected to a rotating ring 1 through 10 support structures 5, the rotating ring 1 is connected to a rotation drive device, and the outer side of the placement area 7 is also provided with 10 limit pressure rods 4 that can swing toward the inner side of the placement area 7, each limit pressure rod 4 is evenly distributed around the placement area 7, and the limit pressure rod 4 is connected to the rotating ring 1 through a connecting rod assembly 5. Among them, the placement area 7 and the rotating ring 1 are both circular and the centers of the two are located on the same axis.

[0032] The connecting rod assembly 5 includes a first connecting rod 51, a second connecting rod 52 and a column 53. The rotating ring 1, the first connecting rod 51 and one end of the second connecting rod 52 are rotatably connected in sequence. The middle part of the second connecting rod 52 is rotatably connected to the column 53. The column 53 is fixedly connected to the ground. The other end of the second connecting rod 52 is connected to one end of the limiting pressure rod 4. The height of each limiting pressure rod 4 should be lower than the rotating ring 1 to ensure that when the limiting pressure rod 4 swings out of the placement area 7, the limiting pressure rod 4 will not interfere with the rotating ring 1. Figure 2 , Figure 7 shown.

[0033] In this embodiment, the second connecting rod 52 and the limiting pressure rod 4 are rotatably connected via the rotating shaft 6 , and a spring 12 is further connected between the second connecting rod 52 and the limiting pressure rod 4 .

[0034] The limiting pressure rods 4 are arc-shaped. When each limiting pressure rod 4 swings to the point where the front end of one of the two adjacent limiting pressure rods 4 is adjacent to the rear end of the other, the distance between the two is less than 1 / 5 of the length of the limiting pressure rod 4. At this time, the arrangement shape of each limiting pressure rod 4 is close to a circle, such as Figure 3 shown.

[0035] Each supporting structure 5 includes a base 31 fixedly connected to the ground, and an outer pressure wheel 32, an upper pressure wheel 33 and a lower support wheel 34 are rotatably connected to the base 31. The outer pressure wheel 32 is in rolling contact with the outer side wall of the rotating ring 1, the upper pressure wheel 33 is in rolling contact with the top surface of the rotating ring 1, and the lower support wheel 34 is in rolling contact with the bottom surface of the rotating ring 1.

[0036] The rotation driving device is a telescopic driving mechanism 2, which specifically adopts a hydraulic telescopic cylinder structure. One end of the telescopic driving mechanism 2 is rotatably connected to the ground through a fixed seat 21, and the other end is rotatably connected to a mounting portion 11 fixed on the rotating ring 1. When the telescopic driving mechanism 2 is started, the rotating ring 1 can be driven to rotate by telescoping.

[0037] When making a casting, the bottom of the wooden mold 9 is fixedly connected to the top of the mold base 8, the sand box 10 is buckled on the top of the mold base 8 and connected to each other through a bolt structure, and the space between the outer side of the wooden mold 9 and the inner wall of the sand box 10 is filled with resin sand formed by mixing raw sand, furan resin, curing agent, etc. in a certain proportion. After the resin sand is solidified to form a casting, the casting (including the sand box 10) and the mold base 8 equipped with the wooden mold 9 are hoisted to the placement area 7 on the ground by a crane (not shown in the figure), so that the lugs 81 around the mold base 8 are also located in the placement area 7, and then the telescopic drive mechanism 2 is started to make the rotating ring 1 rotate around the placement area 7, and the rotating ring 1 drives each limit pressure rod 4 to swing from outside the placement area 7 to inside the placement area through the connecting rod assembly 5, as shown in FIG. Figure 2-4 As shown, at least a part of the limiting pressure rod 4 is moved to the top of each lug of the mold base. Then the sand box 10 above the mold base 8 is pulled up by a crane, and the wooden mold 9 is separated from the solidified resin sand in the sand box 10. Figure 8 As shown, in this process, since the limiting pressure rod 4 limits the lugs 81 of the mold base 8, the mold base 8 and the wooden mold 9 will not be pulled up, so that the sand box 10 can be demolded smoothly.

[0038] When the size of the mold base 8 is large, each limit pressure rod 4 swings to Figure 3 When the size of the mold base 8 is small, each limit pressure rod 4 needs to be further swung to the position shown; Figure 4The position shown in the figure can realize the limit of each lug 81. In this process, if the mold is not placed in the middle of the placement area 7, part of the limit pressure rods 4 will first contact the side wall of the mold base frame 8. Due to the compression capacity of the spring 12, the remaining limit pressure rods 4 can further swing inward under the drive of the rotating ring 1 and the connecting rod assembly 5, until part of the limit pressure rods 4 moves to the top of the lug 81 of each mold base frame 8 to realize the limit function. It can be seen that the mold base frame limit device can also be applied to mold base frames 8 of various sizes.

[0039] The present invention has been described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A casting resin sand molding mold chassis limiting device, characterized in that: The invention comprises a placement area (7) located on the ground, wherein a rotating ring (1) is rotatably connected to the outside of the placement area (7) via a plurality of supporting structures (5), and the rotating ring (1) is connected to a rotating driving device. A plurality of limiting pressure rods (4) which can swing toward the inside of the placement area (7) are also arranged on the outside of the placement area (7), and the limiting pressure rods (4) are arranged around the placement area (7), and the limiting pressure rods (4) are connected to the rotating ring (1) via a connecting rod assembly (5).

2. A casting resin sand molding mold chassis limiting device according to claim 1, characterized in that: The placement area (7) and the rotating ring (1) are both circular, and the centers of the two circles are located on the same axis.

3. A casting resin sand molding mold chassis limiting device according to claim 1 or 2, characterized in that: The connecting rod assembly (5) comprises a first connecting rod (51), a second connecting rod (52) and a column (53); the rotating ring (1), the first connecting rod (51) and one end of the second connecting rod (52) are rotatably connected in sequence; the middle part of the second connecting rod (52) is rotatably connected to the column (53); the column (53) is fixed relative to the ground; and the other end of the second connecting rod (52) is connected to one end of a limiting pressure rod (4).

4. A casting resin sand molding mold chassis limiting device according to claim 3, characterized in that: The second connecting rod (52) and the limiting pressure rod (4) are rotatably connected via a rotating shaft (6), and a spring (12) is also connected between the second connecting rod (52) and the limiting pressure rod (4).

5. The positioning device for the bottom frame of a casting resin sand molding mold according to claim 1, characterized in that: When each of the limiting pressure rods (4) swings to the point where the front end of one of the two adjacent limiting pressure rods (4) is adjacent to the rear end of the other, the distance between the two is less than 1 / 5 of the length of the limiting pressure rod (4).

6. The positioning device for the bottom frame of a casting resin sand molding mold according to claim 1, characterized in that: Each of the supporting structures (5) comprises a base (31) fixed relative to the ground, an outer pressure wheel (32), an upper pressure wheel (33) and a lower support wheel (34) being rotatably connected to the base (31), the outer pressure wheel (32) being in rolling contact with the outer side wall of the rotating ring (1), the upper pressure wheel (33) being in rolling contact with the top surface of the rotating ring (1), and the lower support wheel (34) being in rolling contact with the bottom surface of the rotating ring (1).

7. The positioning device for the bottom frame of a resin sand casting mold according to claim 1, characterized in that: The rotary drive device is a telescopic drive mechanism (2), one end of which is rotatably connected to the ground via a fixed seat (21), and the other end of which is rotatably connected to a mounting portion (11) fixed to the rotating ring (1).

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