Automatic freezing and blowing equipment for rubber parts

Abstract

The present invention discloses an automatic freezing and blowing device for rubber parts, comprising a freezing box, wherein the inner cavity of the freezing box is respectively equipped with a shot jet device for removing burrs from a shock-absorbing pad by shot blasting, and a refrigeration device for cooling the interior of the freezing box by liquid nitrogen. The present invention relates to the technical field of freezing and trimming rubber parts. The automatic freezing and blowing device for rubber parts supplies air to an air nozzle through an air inlet pipe from an external air source, blows away the shock-absorbing pad that is united with the rotation of the material frame, and evenly processes the workpiece, thereby improving the trimming efficiency of the freezing and trimming machine. In addition, due to the rapid cooling, the surface of the shock-absorbing pad becomes wet and accompanied by water vapor. At this time, the shock-absorbing pad is blown dry by the air nozzle, and the fan is started to draw the wet cold air into the air storage tank through the exhaust hopper for pressurized storage, thereby preventing moisture from continuing to adhere to the surface of the shock-absorbing pad. No additional drying is required, and multiple effects can be achieved through the air nozzle, with multiple functions integrated together.

Description

Technical Field

[0001] The invention relates to the technical field of freezing and trimming of rubber parts, in particular to automatic freezing and blowing equipment for rubber parts. Background Art

[0002] The cryo-trimming machine, primarily used to replace manual deburring of rubber molded parts, precision injection molding, and die-casting products, is an essential post-processing equipment in the rubber, plastics, and die-casting industries. Its operating principle is to utilize the cryogenic properties of liquid nitrogen and the physical properties of the workpiece to embrittle the workpiece through freezing. The machine then impacts the burrs with polymer particles, effectively removing the burrs.

[0003] The following problems exist when using the frozen trimming machine described in Patent No. CN206527659U:

[0004] (1) Due to the rapid cooling, the surface of the shock-absorbing pad becomes damp and contains water vapor. After the burrs are removed, it needs to be air-dried, which adds a processing step.

[0005] (2) When the shock-absorbing pad falls from the material frame, the collection effect is poor and manual picking is required. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention provides an automatic freezing and blowing device for rubber parts, which solves the above-mentioned problems.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automatic freezing and blowing device for rubber parts comprises a freezing box, the inner cavity of the freezing box is respectively equipped with a shot jet device for removing burrs of a shock-absorbing pad by shot blasting and a refrigeration device for cooling the inside of the freezing box by liquid nitrogen, the inner cavity of the freezing box is driven by a driving mechanism to have a material frame, the inner cavity of the material frame is fixedly connected to a fixed pipe, the surface of the fixed pipe is connected to an air nozzle, one end of the fixed pipe is connected to an air inlet pipe of an external air source through a rotating sealed air pipe joint, the inner cavity of the freezing box is fixedly connected to an air storage tank, the surface of the air storage tank is connected to a pressure relief valve, the top of the air storage tank is fixedly connected to an air outlet pipe and a fan connected to the air storage tank, the exhaust pipe of the fan is connected to an exhaust hopper, when in use, after opening the material frame cover, the shock-absorbing pad is placed in the material frame, and then the material frame cover is closed, at this time the material frame is driven to rotate by the driving mechanism, and at this time the inside of the freezing box is cooled by the refrigeration device , and then the plastic particles are sprayed out by the shot jet device to impact the shock-absorbing pad in the material frame, and the flash on its surface that has become brittle after cooling is knocked off. At this time, the air nozzle is supplied with air through the air inlet pipe by the external air source to blow away the shock-absorbing pad that is united with the rotation of the material frame, and the workpiece is evenly treated to improve the trimming efficiency of the freezing trimming machine. Then the plastic particles and flash follow the rotation of the material frame and fall from the mesh gaps on the surface of the material frame and the material frame cover. The plastic particles are recovered by the recovery mechanism. After the flash is removed, the liquid nitrogen is recovered by the refrigeration device and ready for discharge. At this time, due to the rapid cooling, the surface of the shock-absorbing pad is wet with water vapor. At this time, the shock-absorbing pad is blown dry by the air nozzle, and the fan is started to draw the wet cold air into the air storage tank for pressurized storage through the exhaust hopper to prevent moisture from continuing to adhere to the surface of the shock-absorbing pad. After the shock-absorbing pad is dried, the box door is opened, and the drive mechanism drives the material frame to descend for unloading.

[0008] As a further solution of the present invention: the air storage tank is equipped with a water absorption and filtering component. When the next batch of shock-absorbing pads are processed, the air storage tank is supplied with air by the fan, and the air at room temperature inside the freezer is drawn into the air storage tank. At this time, the interior of the air storage tank is pressurized, and the air pressure pushes open the pressure relief valve, and the cold air is output to the freezer for pre-cooling, thereby effectively utilizing the cold air and allowing it to be recycled. The cold air can be stored for standby while being dried, saving energy.

[0009] As a further solution of the present invention: an inclined filter is fixedly connected to the surface of the exhaust hopper, and the setting of the inclined filter prevents burrs and plastic particles from falling into the exhaust hopper and causing interference.

[0010] As a further solution of the present invention: the driving mechanism includes a driving shaft driven by a first rotating motor in the inner cavity of the freezer, and a second rotating motor for driving the material frame to rotate is fixedly connected to the surface of the driving shaft. When in use, the driving shaft is driven to rotate by the first rotating motor, driving the material frame to rotate up and down to adjust the tilt angle, and the material frame is driven to rotate by the second rotating motor to drive the workpiece to rotate.

[0011] As a further solution of the present invention: the inner cavity of the freezer is fixedly connected to the guide frames on both sides, and the inner cavity of the guide frames is fixedly connected to the filter screen, through which the flash and plastic particles are filtered, and an inner groove for storing the material receiving box is opened on one side of the guide frame. When the shock-absorbing pad is output after the flash is removed, the material receiving box is slid into the inner groove, and then the driving mechanism drives the driving shaft to rotate, driving the material frame to tilt downward, and then the material frame cover is opened at this time, and then the shock-absorbing pad falls from the material frame and falls into the material receiving box along the guidance of the guide frame, which can effectively prevent the shock-absorbing pad from falling, and at this time some shock-absorbing pads are accumulated inside the material frame, and the material frame is driven to vibrate back and forth by the rotation of the driving shaft to shake off the internal shock-absorbing pad and complete the unloading, and then the material receiving box is slid out of the inner groove and reloaded for processing.

[0012] As a further solution of the present invention: both sides of the guide frame are in contact with the side walls of the freezer, and a guide slope is provided on the top.

[0013] As a further solution of the present invention: a material frame cover is clamped on one side of the material frame, and mesh gaps are formed on the surfaces of the material frame and the material frame cover.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention supplies air to the air nozzle through the air inlet pipe from an external air source, blows away the shock-absorbing pad that is united with the material frame during rotation, and evenly processes the workpiece, thereby improving the trimming efficiency of the freezing trimming machine. In addition, due to the rapid temperature drop, the surface of the shock-absorbing pad becomes moist with water vapor. At this time, the shock-absorbing pad is blown dry through the air nozzle, and the fan is started to draw the wet and cold air into the air storage tank through the exhaust hopper for pressurized storage, which can prevent moisture from continuing to adhere to the surface of the shock-absorbing pad. No additional drying is required, and multiple effects can be achieved through the air nozzle, with multiple functions integrated together.

[0016] 2. The present invention supplies air to the air storage tank through a fan, and draws the room temperature air inside the freezer into the air storage tank. At this time, the interior of the air storage tank is pressurized, and the air pressure pushes open the pressure relief valve, outputting the cold air into the freezer for pre-cooling, effectively utilizing the cold air, which can be recycled and used. The cold air can be stored for standby while being dried, saving energy.

[0017] 3. In the present invention, when the shock-absorbing pad is output after the flash is removed, the material receiving box is slid into the inner groove, and then the driving mechanism drives the driving shaft to rotate, driving the material frame to tilt downward, and then the material frame cover is opened at this time, and then the shock-absorbing pad falls from the material frame and falls into the material receiving box along the guidance of the guide frame, which can effectively prevent the shock-absorbing pad from falling and does not require manual picking up. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural front view of the present invention;

[0019] Figure 2 It is a cross-sectional view of the structure of the present invention;

[0020] Figure 3 It is a structural side view of the present invention.

[0021] In the figure: 1. Freezer; 2. First rotary motor; 3. Drive shaft; 4. Second rotary motor; 5. Material frame; 6. Refrigeration device; 7. Shot ejection device; 8. Material frame cover; 9. Air inlet pipe; 10. Fan; 11. Gas storage tank; 12. Air extraction hopper; 13. Inclined filter screen; 14. Guide frame; 15. Filter screen; 16. Inner groove; 17. Material receiving box; 18. Fixing pipe; 19. Air nozzle; 20. Pressure relief valve. DETAILED DESCRIPTION

[0022] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0023] See also Figure 1-3The present invention provides a technical solution: an automatic freezing and blowing device for rubber parts, comprising a freezing box 1, wherein the inner cavity of the freezing box 1 is respectively equipped with a shot ejection device 7 for removing burrs from a shock-absorbing pad by shot blasting and a refrigeration device 6 for cooling the interior of the freezing box 1 by liquid nitrogen. The inner cavity of the freezing box 1 is driven by a driving mechanism to have a material frame 5, and the inner cavity of the material frame 5 is fixedly connected to a fixed pipe 18, the surface of the fixed pipe 18 is connected to an air nozzle 19, and one end of the fixed pipe 18 is connected to the outside world by a rotary sealing air pipe joint. The air inlet pipe 9 is connected, the inner cavity of the freezer 1 is fixedly connected to the air storage tank 11, the surface of the air storage tank 11 is connected to the pressure relief valve 20, the top of the air storage tank 11 is fixedly connected to the air outlet pipe and the fan 10 connected to the air storage tank 11, the exhaust pipe of the fan 10 is connected to the exhaust hopper 12, when in use, after opening the material frame cover 8, put the shock-absorbing pad into the material frame 5, and then cover the material frame cover 8, at this time, the material frame 5 is driven to rotate by the driving mechanism, and the inside of the freezer 1 is cooled by the refrigeration device 6, and then the air is passed through the refrigeration device 6. The plastic particles ejected by the shot ejection device 7 impact the shock-absorbing pad in the material frame 5, knocking off the flash on its surface that has become brittle after cooling. At this time, the air is supplied to the air nozzle 19 through the air inlet pipe 9 by the external air source, blowing away the shock-absorbing pad that is united with the rotation of the material frame 5, and processing the workpiece evenly, thereby improving the trimming efficiency of the frozen trimming machine. Then, the plastic particles and the flash follow the rotation of the material frame 5 and fall from the mesh gaps on the surface of the material frame 5 and the material frame cover 8. The plastic particles are recovered by the recovery mechanism. After the flashing is completed, the liquid nitrogen is recovered by the refrigeration device 6 and the material is ready for discharge. At this time, due to the rapid temperature drop, the surface of the shock-absorbing pad is moist with water vapor. At this time, the shock-absorbing pad is blown dry through the air nozzle 19, and the fan 10 is started to draw the wet and cold air into the air storage tank 11 through the exhaust hopper 12 for pressurized storage, which can prevent moisture from continuing to adhere to the surface of the shock-absorbing pad. After the shock-absorbing pad is dried, the box door is opened, and then the driving mechanism drives the material frame 5 to descend for unloading.

[0024] The air storage tank 11 is equipped with a water absorption and filtering component. When the next batch of shock-absorbing pads are processed, the air storage tank 11 is supplied with air through the fan 10, and the air at room temperature inside the freezer 1 is drawn into the air storage tank 11. At this time, the inside of the air storage tank 11 is pressurized, and the air pressure opens the pressure relief valve 20, and the cold air is output to the freezer 1 for pre-cooling, which effectively utilizes the cold air and can be recycled for use. The cold air can be stored for standby while being dried, saving energy.

[0025] An oblique filter screen 13 is fixedly connected to the surface of the exhaust hopper 12. The oblique filter screen 13 prevents burrs and plastic particles from falling into the interior of the exhaust hopper 12 and causing interference.

[0026] The driving mechanism includes a driving shaft 3 driven by a first rotating motor 2 in the inner cavity of the freezer 1. A second rotating motor 4 for driving the material frame 5 to rotate is fixedly connected to the surface of the driving shaft 3. When in use, the driving shaft 3 is driven to rotate by the first rotating motor 2, driving the material frame 5 to rotate up and down to adjust the tilt angle, and the material frame 5 is driven to rotate by the second rotating motor 4 to drive the workpiece to rotate.

[0027] The inner cavity of the freezer 1 is fixedly connected to the guide frames 14 on both sides, and the inner cavity of the guide frames 14 is fixedly connected to the filter screen 15, through which the flash and plastic particles are filtered. One side of the guide frame 14 is provided with an inner groove 16 for storing the receiving box 17. When the shock-absorbing pad is output after the flash is removed, the receiving box 17 is slid into the inner groove 16. At this time, the driving mechanism drives the driving shaft 3 to rotate, driving the material frame 5 to tilt downward. At this time, the material frame cover 8 is opened, and then the shock-absorbing pad falls from the material frame 5 and falls into the receiving box 17 along the guidance of the guide frame 14, which can effectively prevent the shock-absorbing pad from falling. At this time, some shock-absorbing pads are accumulated inside the material frame 5. The material frame 5 is driven to vibrate back and forth by the rotation of the driving shaft 3, and the internal shock-absorbing pad is shaken off to complete the unloading. Then the receiving box 17 slides out of the inner groove 16 and is reloaded for processing.

[0028] Both sides of the guide frame 14 are in contact with the side walls of the freezer 1 , and a guide slope is provided on the top.

[0029] A material frame cover 8 is clamped on one side of the material frame 5 , and mesh gaps are formed on the surfaces of the material frame 5 and the material frame cover 8 .

[0030] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An automatic freezing and blowing device for rubber parts, comprising a freezing box (1), wherein the inner cavity of the freezing box (1) is respectively provided with a shot ejection device (7) for removing burrs from a shock-absorbing pad by shot blasting and a refrigeration device (6) for cooling the interior of the freezing box (1) by liquid nitrogen, wherein the device is characterized in that: The inner cavity of the freezing box (1) is driven by a driving mechanism to have a material frame (5), the inner cavity of the material frame (5) is fixedly connected to a fixed pipe (18), the surface of the fixed pipe (18) is connected to an air nozzle (19), one end of the fixed pipe (18) is connected to an external air source inlet pipe (9) through a rotary sealing air pipe joint, the inner cavity of the freezing box (1) is fixedly connected to an air storage tank (11), the surface of the air storage tank (11) is connected to a pressure relief valve (20), the top of the air storage tank (11) is fixedly connected to a fan (10) whose air outlet pipe is connected to the air storage tank (11), the air exhaust pipe of the fan (10) is connected to an air exhaust hopper (12), and the air storage tank (11) is built with a water absorption filter component. When the next batch of shock-absorbing pads are processed, the air storage tank (11) is supplied with air through the fan (10). Normal temperature air inside the freezer (1) is drawn into the gas storage tank (11). At this time, the inside of the gas storage tank (11) is pressurized, and the air pressure opens the pressure relief valve (20), outputting the cold air into the freezer (1) for pre-cooling, effectively utilizing the cold air, which can be circulated for use. The cold air can be stored for standby while being dried, saving energy consumption. The driving mechanism includes a driving shaft (3) driven by a first rotating motor (2) in the inner cavity of the freezer (1), a second rotating motor (4) for driving the material frame (5) to rotate is fixedly connected to the surface of the driving shaft (3), the inner cavity of the freezer (1) is fixedly connected to guide frames (14) located on both sides, the inner cavity of the guide frame (14) is fixedly connected to a filter screen (15), and one side of the guide frame (14) is provided with an inner groove (16) for storing the receiving box (17).

2. The automatic freezing and blowing equipment for rubber parts according to claim 1, characterized in that: An inclined filter screen (13) is fixedly connected to the surface of the exhaust hopper (12).

3. The automatic freezing and blowing equipment for rubber parts according to claim 1, characterized in that: Both sides of the guide frame (14) are in contact with the side walls of the freezer (1), and a guide slope is provided on the top.

4. The automatic freezing and blowing equipment for rubber parts according to claim 1, characterized in that: A material frame cover (8) is clamped on one side of the material frame (5), and mesh gaps are provided on the surfaces of the material frame (5) and the material frame cover (8).

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