A pneumatic ejection mold for core making of cast steel

Abstract

This utility model discloses a pneumatic ejector mold for casting steel core making, relating to the field of casting steel core making technology. The pneumatic ejector mold for casting steel core making includes a hollow base, an ejection mechanism, and an anti-collision mechanism. A lower mold is fixedly mounted on the top of the hollow base. The ejection mechanism is located above the hollow base and includes a cavity, a sliding rod, a connecting plate, and ejector rods. A sliding rod is slidably mounted on the bottom of the lower mold, with one end extending into the cavity and fixedly connected to the bottom of the connecting plate. The top of the connecting plate is fixedly connected to one end of multiple sets of ejector rods. The anti-collision mechanism is located above the hollow base and includes a mounting groove and a damping rod. The cylinder only provides upward lifting force, and the ejector rod is reset by a first spring. It is not connected to any components in the ejection mechanism, eliminating the need for disassembly and reassembly between the mold and the cylinder when changing the mold. This saves time and effort and significantly reduces the workload of operators.

Description

Technical Field

[0001] This utility model relates to the field of cast steel molding and core making technology, and in particular to a pneumatic ejection mold for cast steel molding and core making. Background Technology

[0002] Chinese patent document CN212734068U discloses a pneumatic ejection mold for core making of cast steel. The mold includes a base plate, a support rod bolted to the top of the base plate, a model assembly bolted to the top of the support rod, a cylinder bolted to the center of the top of the base plate, a support plate assembly connected to one end of the cylinder via a telescopic rod, and a movable model block bolted to the top of the support plate assembly. A heating rod is embedded inside the model assembly. This invention uses a cylinder to move the movable model block up and down to eject the finished core box from the mold. The core box has a high yield rate, is less likely to cause burns, and solves the problem of manual removal from the mold. The baking and core making processes of the core box are carried out simultaneously, resulting in high production efficiency, high-quality core boxes, and clear lettering, meeting the requirements of domestic railway cast steel parts production standards and customer requirements.

[0003] In the above-mentioned cast steel molding core-making pneumatic ejection mold, the cylinder extension end is directly fixed to the ejection mechanism during use. This means that when changing the mold, it is necessary to disassemble and install the cylinder separately, which is quite troublesome and greatly increases the workload of the staff. Utility Model Content

[0004] The purpose of this utility model is to provide a pneumatic ejection mold for casting steel core making, which can solve the problem that in the above-mentioned pneumatic ejection mold for casting steel core making, the cylinder extension end is directly fixed to the ejection mechanism, which means that when changing the mold, it is necessary to disassemble and install the cylinder separately, which is more troublesome and greatly increases the workload of the staff.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic ejection mold for casting steel core making, comprising a hollow base, an ejection mechanism, and an anti-collision mechanism. A lower mold is fixedly installed on the top of the hollow base; the ejection mechanism is located above the hollow base and includes a cavity, a sliding rod, a connecting plate, and ejector rods. A sliding rod is slidably installed on the bottom of the lower mold, one end of which extends into the cavity and is fixedly connected to the bottom of the connecting plate. The top of the connecting plate is fixedly connected to one end of multiple sets of ejector rods; the anti-collision mechanism is located above the hollow base and includes a mounting groove and a damping rod. A damping rod is fixedly installed on the bottom inner side of the mounting groove.

[0006] Preferably, the ejection mechanism further includes a first spring, the other end of the sliding rod extends into the interior of the hollow base, the other end of the ejector rod passes through the lower mold, the first spring is fixedly installed on the top of the connecting plate, one end of the first spring is fixedly connected to the top of the inner side of the cavity, the cylinder only provides an upward lifting force, and the first spring resets the ejector rod, which is not connected to the components in the ejection mechanism. When changing the mold, there is no need to disassemble and install with the cylinder, which saves time and effort and greatly reduces the workload of the staff.

[0007] Preferably, the anti-collision mechanism further includes a second spring and a circular plate. The mounting groove is opened on the top of the lower mold. One end of the damping rod is fixedly installed with the circular plate. The second spring is fixedly installed on the bottom inner side of the mounting groove. One end of the second spring is fixedly connected to the bottom of the circular plate. The damping rod passes through the interior of the second spring and is not connected to it. It can buffer when the lower mold and the upper mold are combined, avoid direct hard impact between the two, reduce the probability of mold damage, extend its service life as much as possible, and improve the availability and practicality of the device.

[0008] Preferably, a cylinder is fixedly installed on the inner bottom of the hollow base, and the cylinder is located below the sliding rod.

[0009] Preferably, the top of the lower mold has multiple sets of guide grooves.

[0010] Preferably, a set of movable rods are slidably installed on the inner wall of the guide groove, and an upper mold is fixedly installed at one end of each movable rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This pneumatic ejection mold for casting steel core making uses a cavity, sliding rod, connecting plate, ejector rod and first spring. The cylinder only provides the upward lifting force, and the first spring resets the ejector rod. It is not connected to the components in the ejection mechanism. When changing the mold, there is no need to disassemble and install it with the cylinder. It is time-saving and labor-saving to operate, and greatly reduces the workload of the staff.

[0013] The cast steel core-making pneumatic ejection mold, through the combined use of mounting groove, damping rod, second spring and circular plate, can buffer when the lower mold and upper mold are combined, avoid direct hard impact between the two, reduce the probability of mold damage, extend its service life as much as possible, and improve the availability and practicality of the device. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a bottom-view three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is a three-dimensional structural diagram of the lower mold of this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the top material rod of this utility model.

[0019] Reference numerals: 1. Hollow base; 2. Lower mold; 3. Cylinder; 4. Ejection mechanism; 401. Cavity; 402. Sliding rod; 403. Connecting plate; 404. Ejector rod; 405. First spring; 5. Anti-collision mechanism; 501. Mounting groove; 502. Damping rod; 503. Second spring; 504. Circular plate; 6. Movable rod; 7. Upper mold; 8. Guide groove. Detailed Implementation

[0020] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0021] Please see Figure 1-4 This utility model provides a technical solution: a pneumatic ejection mold for casting steel core making, including a hollow base 1, an ejection mechanism 4, and an anti-collision mechanism 5. A lower mold 2 is fixedly installed on the top of the hollow base 1; the ejection mechanism 4 is disposed above the hollow base 1, and includes a cavity 401, a sliding rod 402, a connecting plate 403, and an ejector rod 404. The sliding rod 402 is slidably installed on the bottom of the lower mold 2, and one end of the sliding rod 402 extends into the interior of the cavity 401 and is fixedly connected to the bottom of the connecting plate 403. The top of the receiving plate 403 is fixedly connected to one end of multiple sets of ejector rods 404; the anti-collision mechanism 5 is set above the hollow base 1, and the anti-collision mechanism 5 includes an installation groove 501 and a damping rod 502. The damping rod 502 is fixedly installed on the bottom inner side of the installation groove 501; a cylinder 3 is fixedly installed on the bottom inner side of the hollow base 1, and the cylinder 3 is located below the sliding rod 402; multiple sets of guide grooves 8 are opened on the top of the lower mold 2; a set of movable rods 6 are slidably installed on the inner wall of the guide grooves 8, and an upper mold 7 is fixedly installed on one end of the movable rod 6.

[0022] Secondly, the ejection mechanism 4 also includes a first spring 405, the other end of the sliding rod 402 extends into the interior of the hollow base 1, the other end of the ejector rod 404 passes through the lower mold 2, the top of the connecting plate 403 is fixedly installed with the first spring 405, one end of the first spring 405 is fixedly connected to the top of the inner side of the cavity 401, the cylinder 3 only provides the upward lifting force, and the first spring 405 resets the ejector rod 404. It is not connected to the components in the ejection mechanism 4. When changing the mold, there is no need to disassemble and install with the cylinder 3. It saves time and effort in operation and greatly reduces the workload of the staff.

[0023] Furthermore, the anti-collision mechanism 5 also includes a second spring 503 and a circular plate 504. The mounting groove 501 is opened on the top of the lower mold 2. One end of the damping rod 502 is fixedly installed with the circular plate 504. The second spring 503 is fixedly installed on the bottom inner side of the mounting groove 501. One end of the second spring 503 is fixedly connected to the bottom of the circular plate 504. The damping rod 502 passes through the interior of the second spring 503 and is not connected to it. It can buffer when the lower mold 2 and the upper mold 7 are combined, avoid direct hard impact between the two, reduce the probability of mold damage, extend its service life as much as possible, and improve the availability and practicality of the device.

[0024] Working principle: When in use, the upper mold 7 is connected to an external hydraulic device. The upper mold 7 is pushed down by the sliding guide of the movable rod 6 in the guide groove 8 until it contacts the top of the circular plate 504. This causes the damping rod 502 to retract and compress the second spring 503, which in turn causes the circular plate 504 to be pulled into the mounting groove 501, thus buffering the upper mold 7. Then, the lower mold 2 and the upper mold 7 are combined to press the raw material for core making. After pressing and forming, the upper mold 7 is raised, and the cylinder 3 is activated, causing its free end to extend and press against the lower sliding rod 402. This pushes the sliding rod 402 to slide upward, causing the connecting plate 403 to move upward in the cavity 401. This, in turn, causes the ejector rod 404 to move upward and compress the first spring 405, thus ejecting the pressed core box from the lower mold 2. When the cylinder 3 retracts, under the elastic action of the first spring 405, the connecting plate 403 moves downward, and the ejector rod 404 returns to its original position.

[0025] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A pneumatic ejection mold for core making in cast steel molding, characterized in that, include: Hollow base (1), with a lower mold (2) fixedly installed on the top of the hollow base (1); Ejection mechanism (4) is located above hollow base (1). Ejection mechanism (4) includes cavity (401), sliding rod (402), connecting plate (403) and ejector rod (404). Sliding rod (402) is slidably installed on the bottom of lower mold (2). One end of sliding rod (402) extends into the cavity (401) and is fixedly connected to the bottom of connecting plate (403). The top of connecting plate (403) is fixedly connected to one end of multiple sets of ejector rods (404). The anti-collision mechanism (5) is located above the hollow base (1). The anti-collision mechanism (5) includes a mounting groove (501) and a damping rod (502). The damping rod (502) is fixedly installed on the bottom inner side of the mounting groove (501).

2. A pneumatic knockout mold for steel casting molding core making according to claim 1, characterized in that: The ejection mechanism (4) also includes a first spring (405), the other end of the sliding rod (402) extends into the interior of the hollow base (1), the other end of the ejector rod (404) passes through the lower mold (2), the top of the connecting plate (403) is fixedly installed with the first spring (405), and one end of the first spring (405) is fixedly connected to the top of the inner side of the cavity (401).

3. A pneumatic knockout die for steel foundry molding core making according to claim 2, characterized in that: The anti-collision mechanism (5) also includes a second spring (503) and a circular plate (504). The mounting groove (501) is opened on the top of the lower mold (2). One end of the damping rod (502) is fixedly installed with the circular plate (504). The second spring (503) is fixedly installed on the bottom inner side of the mounting groove (501). One end of the second spring (503) is fixedly connected to the bottom of the circular plate (504). The damping rod (502) passes through the interior of the second spring (503) and is not connected to it.

4. A pneumatic knockout die for steel foundry molding core making according to claim 3, characterized in that: A cylinder (3) is fixedly installed on the inner bottom of the hollow base (1), and the cylinder (3) is located below the sliding rod (402).

5. A pneumatic knockout die for steel foundry molding core making according to claim 4, characterized in that: The top of the lower mold (2) has multiple sets of guide grooves (8).

6. A pneumatic ejector mold for core making of cast steel according to claim 5, characterized in that: A set of movable rods (6) are slidably installed on the inner wall of the guide groove (8), and an upper mold (7) is fixedly installed on one end of the movable rods (6).

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