Blowing mechanism of punch-out machine

Abstract

A purging mechanism of a punch-out machine is characterized in that purging devices are mounted at the upper end and the lower end of a guide sleeve, each purging device comprises a main blowing pipe and a plurality of blowing nozzles arranged on the main blowing pipe, and when a guide rod vertically moves relative to the guide sleeve, the blowing nozzles can blow high-pressure gas onto the guide rod and blow off sand grains attached to the guide rod, so that the blowing efficiency of the guide rod is improved; the situation that due to excessive friction, the structure is damaged, and corresponding guiding and supporting effects cannot be achieved is avoided, meanwhile, when a guide rod vertically moves, baffles on a vertical rod can be synchronously driven to vertically ascend and descend, the baffles make contact with swing turning plates in sequence, air blowing nozzles on an air blowing main pipe can be driven to swing in a reciprocating mode, all-directional sand blowing is conducted on the guide rod, and the service life of the air blowing main pipe is prolonged. And the matched movement between the guide rod and the guide sleeve is ensured, so that the overall box poking operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning devices for core pushing machines, and specifically relates to a purging mechanism for a core pushing machine. Background Art

[0002] The core pushing machine is one of the important component devices in the static pressure molding line. Generally, the hydraulic power assembly is used to push the molding sand with castings out of the sand box to facilitate the subsequent shakeout and part taking. Since the weight of the castings and molding sand borne is relatively large, a number of guide sleeves and guide rods are usually added between the hydraulic power component and the lifting plate. However, during the process of pushing out the molding sand, due to the friction between them, sand grains will fall off. Since the sand grains have a certain viscosity themselves, if they fall on the guide rods, it will affect the fit between the guide rods and the guide sleeves. The relatively large frictional force between them is likely to cause scratching during relative movement. After long-term use, it will not only fail to play the corresponding guiding role, but also cause damage to the guide sleeves or guide rods, thereby affecting the overall core pushing operation efficiency. Content of the Utility Model

[0003] The purpose of the utility model is to provide a purging mechanism for a core pushing machine, in which purging devices are installed at both the upper and lower ends of the guide sleeve, and the sand grains attached to the components are blown off by high-pressure gas, thus solving the problems in the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows: The purging mechanism of the box poking machine includes a fixed frame. Two guide sleeves arranged side by side are installed on the fixed frame. Guide rods are installed in each guide sleeve in a matching manner. A box poking oil cylinder is arranged on the fixed frame between the two guide sleeves. A lifting plate is installed on the piston rod of the box poking oil cylinder. The tops of the guide rods are installed on both sides of the lifting plate. The lifting and lowering of the piston rod of the box poking oil cylinder can drive the guide rods to move vertically relative to the guide sleeves. Purging devices are installed at both the upper and lower ends of the guide sleeves. The purging device includes a blowing main pipe arranged on the guide sleeve. A number of blowing nozzles are installed on one side of the blowing main pipe close to the guide rod. When the guide rod moves vertically relative to the guide sleeve, the blowing nozzles can blow high-pressure gas onto the guide rod. Connecting plates are installed on both sides of the upper and lower ends of the guide sleeve. A rotatable blowing main pipe is installed between the connecting plates in a hinged manner. A swinging flap is arranged on the side of the blowing main pipe away from the blowing nozzles. Tension springs are installed between the front and rear sides of the blowing main pipe and the guide sleeve. The two tension springs always tend to keep the blowing nozzles on the blowing main pipe in a horizontal state. A vertically arranged upright rod is connected to the bottom of the guide rod. A number of baffles are arranged on the side of the upright rod close to the swinging flap. The swinging flap is located between the baffles. When the guide rod moves vertically, the baffles on the upright rod come into contact with the swinging flap in sequence and overcome the elastic force of the tension springs to drive the blowing nozzles on the blowing main pipe to swing reciprocally. The guide sleeve is connected to the fixed frame through a flat plate. Avoidance holes matching the upright rod and the baffles are opened on the flat plate. A horizontally arranged first supporting plate is connected between the middle positions of the two guide sleeves. A limiting boss is installed on the cylinder barrel of the box poking oil cylinder. The limiting boss is located above the first supporting plate. A horizontally arranged second supporting plate is connected between the bottom positions of the two guide sleeves. Through holes matching the cylinder barrel of the box poking oil cylinder are opened on both the first supporting plate and the second supporting plate. The upper end of the guide sleeve is detachably installed with a first shaft sleeve through a bolt, and the lower end of the guide sleeve is detachably installed with a second shaft sleeve through a bolt. The upper and lower ends of the guide rod pass through the first shaft sleeve and the second shaft sleeve respectively.

[0005] The positive effect of the utility model is as follows: For the purging mechanism of the box poking machine described in the utility model, purging devices are installed at both the upper and lower ends of the guide sleeve. The purging device includes a blowing main pipe and a number of blowing nozzles arranged thereon. When the guide rod moves vertically relative to the guide sleeve, the blowing nozzles can blow high-pressure gas onto the guide rod and blow off the sand grains attached thereto, avoiding damage to the structure caused by excessive friction and being unable to play the corresponding guiding and supporting roles. At the same time, when the guide rod moves vertically, it can synchronously drive the baffles on the upright rod to move up and down vertically and come into contact with the swinging flap in sequence, which can drive the blowing nozzles on the blowing main pipe to swing reciprocally, perform all-round sand grain blowing on the guide rod, ensure the coordinated movement between the guide rod and the guide sleeve, and thus improve the overall box poking operation efficiency. Description of the Drawings

[0006] Figure 1It is a schematic structural diagram of the present utility model;

[0007] Figure 2 is Figure 1 the right view of;

[0008] Figure 3 is Figure 1 the sectional view taken along the A-A direction in;

[0009] Figure 4 is Figure 2 the partial enlarged view of I in;

[0010] Figure 5 It is a schematic diagram of the state when the air blowing nozzle blows air upward when the vertical rod moves downward;

[0011] Figure 6 It is a schematic diagram of the state when the air blowing nozzle blows air downward when the vertical rod moves upward;

[0012] Figure 7 It is the usage state diagram of the present utility model on the sand box punching machine. Specific embodiments

[0013] A sand box punching machine purging mechanism according to the present utility model, as Figure 1 and Figure 2 shown, includes a fixed frame 1. On the fixed frame 1, there are tracks for the sand box to move, so as to facilitate the sand box punching operation of the casting molding sand. Two guide sleeves 2 arranged side by side are installed on the fixed frame 1. A guide rod 3 is fitted in each guide sleeve 2. A punching cylinder 4 is provided on the fixed frame 1 between the two guide sleeves 2. A lifting plate 5 is installed on the piston rod of the punching cylinder 4. The top ends of the guide rods 3 are installed on both sides of the lifting plate 5. The lifting and lowering of the piston rod of the punching cylinder 4 can drive the guide rods 3 to move vertically relative to the guide sleeves 2, and synchronously drive the lifting and lowering of the lifting plate 5, so as to realize the corresponding punching operation.

[0014] To avoid the influence of the falling sand grains on the vertical movement of the guide rod 3, purging devices are installed at both the upper and lower ends of the guide sleeve 2. The purging devices can blow high-pressure gas onto the guide rod 3, and blow off the sand grains attached to the guide rod 3 before the guide rod 3 vertically moves into the guide sleeve 2, ensuring the adaptability between the guide rod 3 and the guide sleeve 2 and reducing the friction between their movements.

[0015] The purging device includes a blowing main pipe 6 arranged on the guide sleeve 2. A plurality of blowing nozzles 7 are installed on one side of the blowing main pipe 6 close to the guide rod 3. The blowing main pipe 6 is connected to a high-pressure gas source through a pipeline. When the guide rod 3 moves vertically relative to the guide sleeve 2, the blowing nozzles 7 can blow high-pressure gas onto the guide rod 3.

[0016] Furthermore, in order to realize the large-range swinging blowing of the blowing nozzles 7 on the guide rod 3 and improve the sand grain blowing effect, as Figure 3And Figure 4 As shown, on both sides of the upper and lower ends of the guide sleeve 2, connecting plates 8 are installed. A rotatable main blowing pipe 6 is hinged and installed between the connecting plates 8. On one side of the main blowing pipe 6 away from the blowing nozzle 7, there is a swinging flap 9. On both the front and back sides of the main blowing pipe 6 and between it and the guide sleeve 2, tension springs 10 are installed. The two tension springs 10 always tend to keep the blowing nozzle 7 on the main blowing pipe 6 in a horizontal state. That is, in the absence of external interference, the blowing nozzle 7 is in a horizontal position to blow off the guide rod 3.

[0017] To achieve the reciprocating swing of the blowing nozzle 7, a vertically arranged upright rod 11 is connected to the bottom of the guide rod 3. On one side of the upright rod 11 close to the swinging flap 9, there are several baffles 12. The swinging flap 9 is located at the position between the baffles 12. When the guide rod 3 moves vertically, the baffles 12 on the upright rod 11 come into contact with the swinging flap 9 in sequence and overcome the elastic force of the tension springs 10 to drive the blowing nozzle 7 on the main blowing pipe 6 to perform a reciprocating swing.

[0018] In order to enable the vertically moving upright rod 11 to act on the purging device on the upper side of the guide sleeve 2 synchronously, the guide sleeve 2 is connected to the fixed frame 1 through a flat plate 18. An avoidance hole 19 matching the upright rod 11 and the baffles 12 is opened on the flat plate 18. The upright rod 11 and the baffles 12 on it can pass through the avoidance hole 19 to contact the swinging flap 9 on the upper side of the guide sleeve 2 and drive it to reciprocate. The setting of the flat plate 18 not only plays a role in connecting and installing between the guide sleeve 2 and the fixed frame 1, but also does not interfere with the vertical lifting movement of the upright rod 11.

[0019] When the guide rod 3 moves downward, as Figure 5 shown, the upright rod 11 moves downward synchronously. The baffle 12 moves downward to contact the swinging flap 9. The continuous downward movement of the baffle 12 will drive the main blowing pipe 6 to rotate clockwise in the Figure 5 shown direction, stretching the rear tension spring 10. The blowing nozzle 7 rotates to an inclined upward state, and the upper side position of the guide rod 3 can be blown off. When the baffle 12 further moves downward and disengages from the swinging flap 9, under the pulling of the rear tension spring 10, the main blowing pipe 6 will rotate counterclockwise to reset. During the process of rotating and resetting, the blowing nozzle 7 swings reciprocally and finally returns to the original horizontal state. In the above process, the blowing nozzle 7 will rotate to an inclined downward state to blow off the lower side position of the guide rod 3, thus realizing a larger range of blowing off of the guide rod 3. The action of the above blowing nozzle 7 is that one baffle 12 contacts the swinging flap 9. There are several baffles 12 on the upright rod 11. During the gradual downward movement of the upright rod 11, the several baffles 12 will drive the blowing nozzle 7 to perform a reciprocating swing.

[0020] When the guide rod 3 moves upward, as Figure 6As shown, the vertical rod 11 moves upward synchronously, and the baffle 12 moves upward to contact the swing flap 9. The continuous upward movement of the baffle 12 will drive the air blowing main pipe 6 to rotate counterclockwise in the Figure 6 direction shown, stretching the front side tension spring 10, and the air blowing nozzle 7 rotates to a state of tilting downward, so that the lower side position of the guide rod 3 can be blown. When the baffle 12 further moves upward and disengages from the swing flap 9, under the pulling of the front side tension spring 10, the air blowing main pipe 6 will rotate clockwise to reset. During the process of rotating and resetting, the air blowing nozzle 7 swings reciprocally and finally returns to the original horizontal state. During the above process, the air blowing nozzle 7 will rotate to a state of tilting upward to blow the upper side position of the guide rod 3, thus realizing a larger range of blowing of the guide rod 3. The movement of the above air blowing nozzle 7 is that a baffle 12 contacts the swing flap 9. There are several baffles 12 provided on the vertical rod 11. During the process of the vertical rod 11 gradually moving upward, several baffles 12 will drive the air blowing nozzle 7 to swing reciprocally.

[0021] Furthermore, in order to facilitate the positioning and installation of the box poking oil cylinder 4, a horizontally arranged first supporting plate 13 is connected between the middle positions of the two guide sleeves 2. A limit boss 14 is installed on the cylinder barrel of the box poking oil cylinder 4, and the limit boss 14 is located above the first supporting plate 13. The first supporting plate 13 can provide installation positioning for the box poking oil cylinder 4 and can also serve as a force support when the oil cylinder piston rod extends. A horizontally arranged second supporting plate 15 is connected between the bottom positions of the two guide sleeves 2. In order to realize the penetration of the cylinder barrel through the two supporting plates, through holes matching the cylinder barrel of the box poking oil cylinder 4 are provided on both the first supporting plate 13 and the second supporting plate 15.

[0022] Furthermore, in order to facilitate the vertical lifting movement of the guide rod 3 in the guide sleeve 2 and enable the guide sleeve 2 to stably guide the guide rod 3, a first bushing 16 is detachably installed at the upper end of the guide sleeve 2 through bolts, and a second bushing 17 is detachably installed at the lower end of the guide sleeve 2 through bolts. The upper and lower ends of the guide rod 3 respectively pass through the first bushing 16 and the second bushing 17.

[0023] The technical solution of the present utility model is not limited within the scope of the embodiments described in the present utility model. The technical content not described in detail in the present utility model is all well-known technologies.

Claims

1. A purging mechanism for a box stabbing machine, characterized in that: It includes a fixing frame (1), on which two guide sleeves (2) arranged side by side are installed. A guide rod (3) is fitted and installed in each guide sleeve (2). A box poking oil cylinder (4) is provided on the fixing frame (1) between the two guide sleeves (2). A jacking plate (5) is installed on the piston rod of the box poking oil cylinder (4). The tops of the guide rods (3) are installed on both sides of the jacking plate (5). The lifting of the piston rod of the box poking oil cylinder (4) can drive the guide rods (3) to move vertically relative to the guide sleeves (2). Blow cleaning devices are installed at both the upper and lower ends of the guide sleeves (2). The blow cleaning device includes a blowing main pipe (6) provided on the guide sleeve (2). A number of blowing nozzles (7) are installed on one side of the blowing main pipe (6) close to the guide rod (3). When the guide rod (3) moves vertically relative to the guide sleeve (2), the blowing nozzles (7) can blow high-pressure gas onto the guide rod (3).

2. The purging mechanism of a box stabbing machine according to claim 1, wherein: Connecting plates (8) are installed on both sides of the upper and lower ends of the guide sleeve (2). A rotatable blowing main pipe (6) is hinged and installed between the connecting plates (8). A swing flap (9) is provided on one side of the blowing main pipe (6) away from the blowing nozzles (7). Pulling springs (10) are installed between the front and back sides of the blowing main pipe (6) and the guide sleeve (2). The two pulling springs (10) always tend to keep the blowing nozzles (7) on the blowing main pipe (6) in a horizontal state. A vertically arranged upright rod (11) is connected to the bottom of the guide rod (3). A number of baffles (12) are provided on one side of the upright rod (11) close to the swing flap (9). The swing flap (9) is located at the position between the baffles (12). When the guide rod (3) moves vertically, the baffles (12) on the upright rod (11) come into contact with the swing flap (9) in sequence and overcome the elastic force of the pulling springs (10) to drive the blowing nozzles (7) on the blowing main pipe (6) to swing reciprocally.

3. The purging mechanism of a box poking machine according to claim 2, characterized in that: The guide sleeve (2) is connected to the fixing frame (1) through a flat plate (18). Avoidance holes (19) matching the upright rod (11) and the baffles (12) are formed in the flat plate (18).

4. The purging mechanism of a box poking machine according to claim 1, characterized in that: A horizontally arranged first supporting plate (13) is connected between the middle positions of the two guide sleeves (2). A limiting boss (14) is installed on the cylinder barrel of the box poking oil cylinder (4). The limiting boss (14) is located above the first supporting plate (13). A horizontally arranged second supporting plate (15) is connected between the bottom positions of the two guide sleeves (2). Through holes matching the cylinder barrel of the box poking oil cylinder (4) are formed in both the first supporting plate (13) and the second supporting plate (15).

5. The purging mechanism of a box poking machine according to claim 1, characterized in that: The upper end of the guide sleeve (2) is detachably installed with a first shaft sleeve (16) through bolts, and the lower end of the guide sleeve (2) is detachably installed with a second shaft sleeve (17) through bolts. The upper and lower ends of the guide rod (3) respectively pass through the first shaft sleeve (16) and the second shaft sleeve (17).

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