CN110203485B

CN110203485B - Bearing stacking and packaging equipment and stacking and packaging method

Info

Publication number: CN110203485B
Application number: CN201910567380.XA
Authority: CN
Inventors: 陈铮; 陈昌亮; 陈哲
Original assignee: Nanjing Tengda Metal Product Co ltd
Current assignee: Nanjing Tengda Metal Product Co ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2021-01-15
Anticipated expiration: 2039-06-27
Also published as: CN110203485A

Abstract

The invention discloses a bearing stacking and packaging device and a stacking and packaging method, and belongs to the field of precision bearing packaging. Wherein, a bearing stacking and packing equipment includes: the conveyer installs the clamp of installing in the conveyer top and gets the device, installs in conveyer one side, gets the stacking device of getting the device below, installs the camera of getting the device top of getting to and put things in good order the device and install the master control computer with same one side with the stacking device, the stacking device includes: fixedly mounted puts the table in good order of conveyer one side to and install the filling device who puts in good order table intermediate position top, wherein, filling device includes: the invention provides a bearing with a sealing air bag, which comprises an action device arranged on a stacking table, a blow molding machine nozzle arranged on the action device, a pressing block arranged below the action device and concentric with the blow molding machine nozzle, and cutting devices arranged at two sides of the pressing block below the action device.

Description

Bearing stacking and packaging equipment and stacking and packaging method

Technical Field

The invention belongs to the field of precision bearing packaging, and particularly relates to a bearing stacking and packaging device and a stacking and packaging method.

Background

The bearing is an important part for supporting the mechanical rotating body in the current mechanical equipment, reducing the friction coefficient in the motion process and ensuring the rotation precision of the mechanical rotating body.

The problems of collision prevention and the like need to be noticed in the processes of bearing transportation, installation and use, the existing bearing packaging is that the outer edge of the bearing is manually sealed and then sealed and packaged by using a hot melting machine, then the packaged bearing is placed in a small paper box, and then the small paper box is placed in the paper box, however, the packaging can only achieve the moisture-proof effect on the bearing, the inner contour of the bearing is not packaged to achieve the purpose of preventing the impact, and the bearings packaged in the small paper box are easy to scatter in the selling process and are not beneficial to counting the number.

Disclosure of Invention

The purpose of the invention is as follows: a bearing stacking and packing device and a stacking and packing method aim to solve the problems in the prior art.

The technical scheme is as follows: a bearing stacking and packing device comprises: the conveyer is installed and is got the device at the clamp of conveyer top, it includes to get the device to get: the stacking device comprises a gear rack mechanism, a moving frame, a servo motor, a first air cylinder and a pneumatic clamping jaw, wherein the gear rack mechanism is arranged above the conveyor and the stacking device in parallel, the moving frame is rotationally connected with a gear, the servo motor is fixedly connected with the moving frame, the first air cylinder is fixedly connected with the moving frame, and the pneumatic clamping jaw is fixed below the first air cylinder;

install in conveyer one side, press from both sides the stacking device of getting device below, stacking device includes: fixedly mounted puts the table in good order of conveyer one side to and install the filling device who puts in good order table intermediate position top, wherein, filling device includes: the device comprises an action device arranged on a stacking table, a blow molding machine nozzle arranged on the action device, a pressing block arranged below the action device and concentric with the blow molding machine nozzle, and cutting devices arranged at two sides of the pressing block below the action device, wherein the blow molding machine nozzle penetrates through a connecting plate and the pressing block, and the pressing block and the cutting devices are respectively and elastically connected with the action device;

a camera installed above the gripping device, the camera being located at a middle position of the conveyor, wherein the camera has a visual recognition function;

and the master control computer is arranged on the same side with the stacking device and is electrically connected with the stacking device, the clamping device and the camera.

In a further embodiment, the action means comprises: the stacking table comprises a second cylinder, a supporting plate, a third cylinder and a connecting plate, wherein the second cylinder is transversely and fixedly arranged above the stacking table, the supporting plate is arranged on the second cylinder and moves linearly, the third cylinder is vertically arranged on the supporting plate, and the connecting plate moves linearly below the third cylinder; the blowing machine nozzle is installed above the connecting plate, the pressing block and the cutting device are installed below the connecting plate, the stacking device is prevented from colliding with the clamping device, the stacking device can move due to the fact that the air cylinder is used, the stacking device is prevented from colliding with the clamping device, the degree of freedom of the stacking device is increased, and future overhauling and maintenance are facilitated.

In a further embodiment, the cut-off device comprises: the fourth cylinder and the fifth cylinder are elastically connected with the connecting plate and are respectively installed on two sides of the pressing block, the cutter moves linearly on the fourth cylinder, and the clamping block moves linearly on the fifth cylinder, wherein the cutter and the clamping block are respectively in sliding connection with the pressing block, the cutter is matched with the clamping block, the matching of the cutter and the clamping block is improved, the blow molding of the filling device can be cut off, and the preparation is made for the next work.

In further embodiment, the below fixed mounting of connecting plate has two risers, the riser be located the rear of fourth cylinder and fifth cylinder and with fourth cylinder and fifth cylinder sliding connection, use the riser to block the cylinder body of cylinder and can guarantee the normal release of cutter and clamp splice.

In a further embodiment, the cutter comprises: the cutting edge is connected with the elastic block in a sliding mode, the distance from the cutting edge to the bottom end of the fixed block is larger than the distance from the surface of the elastic block to the bottom end of the fixed block when the elastic block is compressed, and the distance from the cutting edge to the bottom end of the fixed block is smaller than the distance from the surface of the elastic block to the bottom end of the fixed block when the elastic block is ejected; the clamp splice shape is the same with the bullet piece, and wherein, cutting edge and clamp splice sliding connection, through the elastic connection of bullet piece and fixed block, the cutting edge can not cut off plastic film when accomplishing bullet piece and clamp splice butt, behind bullet piece and clamp splice butt, makes plastic film obtain sealed back cutting edge just can cut off plastic film, has guaranteed the packing to profile in the bearing, makes profile in the bearing obtain sufficient holding power.

In a further embodiment, the pressing block is a circular ring matched with the bearing, a through groove is formed in the side face of the pressing block, and the width of the through groove is larger than the inner diameter of the pressing block and smaller than the outer diameter of the pressing block; the cutter and the clamping block are arranged in the through groove and are in sliding connection with the through groove, the displacement process of the cutter and the clamping block is supported through the through groove, the working precision of the cutter and the clamping block can be improved, and the cutter and the clamping block are prevented from being deviated in the displacement process and from breaking down.

In a further embodiment, the inner profile of the bottom end of the compact is chamfered, the chamfer having an outer diameter greater than the outer diameter of the bearing, and the bearing can be guided concentric with the compact and the blow molder nozzle by the chamfer at the bottom end of the compact into contact with the bearing, further improving the accuracy of the operation.

In a further embodiment, linear slide rails are installed on one sides of the first cylinder, the second cylinder and the third cylinder, the pneumatic clamping jaw, the supporting plate and the connecting plate move linearly on the linear guide rails, the working accuracy and the radial force resistance of the first cylinder, the second cylinder and the third cylinder can be further improved through the linear slide rails, and the service life of the equipment is prolonged.

A stacking and packing method of a bearing stacking and packing device comprises the following steps: the first step is as follows: firstly, placing the bearing on a conveyor, and transporting the bearing to a clamping device by the conveyor;

the second step is that: the camera detects the position of the bearing, sends the position of the bearing to the master control computer, the master control computer calculates the position of the bearing, controls the clamping device to move to the position for calculating the bearing, clamps the bearing through the air claw, conveys the bearing to a preset position of the stacking table, and records the number of the clamped bearings;

the third step: the main control computer controls the second cylinder to extend out, so that the nozzle of the blow molding machine, the pressing block and the bearing are concentric, and then the third cylinder extends out to fix the bearing through the pressing block;

the fourth step: when the pneumatic claw clamps a bearing again, the third cylinder is firstly retracted, then the second cylinder is retracted so as to avoid collision between the clamping device and the filling device, and after the pneumatic claw puts down the bearing again and leaves the upper part of the bearing, the step of the third step is repeated again to fix the bearing;

the fifth step: when the bearings on the stacking table are accumulated to a certain number, the pressing block presses the bearing on the uppermost layer to fix the bearing, and then a nozzle of the blow molding machine fills a plastic film into the inner contour of the bearing;

and a sixth step: after the inner contour of the bearing is filled with the plastic film, the fourth cylinder and the fifth cylinder extend out, so that the clamping block and the elastic block are abutted, and then the cutting edge extends out of the upper part of the elastic block and is in sliding connection with the upper part of the clamping block, so that the plastic film is sealed and cut off;

the seventh step: the stacking device leaves from the position of the bearing, the stacked and packaged bearing is taken out manually, and the number of the stacked and packaged bearings is recorded by the main control computer.

Has the advantages that: the invention discloses a bearing stacking and packing device and a stacking and packing method.A plastic film is filled into the inner contour of a bearing through a nozzle of a blow molding machine of a filling device after the bearing is stacked through a clamping device and a stacking device, so that the inner contour of the bearing obtains enough supporting force to achieve the effect of impact resistance; and the filled plastic film is a sealed air bag in a series of bearings, so that enough supporting force is provided for the series of bearings, the series of bearings are fixed together, and the plastic film is only required to be taken out of the plastic film one by one when the plastic film is required to be taken out, and the sealed plastic film still has enough supporting force for the rest of the bearings after the plastic film is taken out, so that the mess can not occur, and the counting number is beneficial to the sales.

Drawings

Fig. 1 is an assembly schematic of the present invention.

Fig. 2 is a schematic diagram of the working principle of the present invention.

Figure 3 is a schematic representation of the working principle of the pneumatic gripper of the present invention.

The reference numerals shown in fig. 1 to 3 are: the device comprises a conveyor 1, a clamping device 2, a stacking device 3, a camera 4, a main control computer 5, a blow molding machine nozzle 6, a bearing 7, a gear rack mechanism 21, a moving frame 22, a servo motor 23, a first air cylinder 24, a pneumatic clamping jaw 25, a stacking table 31, a filling device 32, a pressing block 33, a cutting device 34, an action device 321, a fourth air cylinder 341, a fifth air cylinder 342, a cutter 343, a clamping block 344, a second air cylinder 3211, a supporting plate 3212, a third air cylinder 3213, a connecting plate 3214, a fixing block 3431, a cutting edge 3432 and an elastic block 3433.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

In this embodiment, a bearing stacking and packing apparatus includes: the conveyer for conveying the bearings is a belt plane linear conveyer and can convey the bearings according to a specified route.

A press from both sides and get device for inciting somebody to action bearing sorting transports carries out the clamp of putting things in good order on putting the device from the conveyer and put things in good order, press from both sides the device and include the servo motor who gets the device and provide power for pressing from both sides, rotate with servo motor and be connected, and turn into linear motion's rack and pinion mechanism with servo motor's rotation, so avoid bumping when the transportation and installed first cylinder and will realize pressing from both sides the pneumatic clamping jaw of getting the function on the rack and pinion mechanism and install on the telescopic link of first cylinder, like this when the action is got to needs clamp, first cylinder is withdrawed and is put things in good order the device through rack and pinion mechanism with first cylinder, pneumatic clamping jaw and bearing transportation.

In order to realize that the clamping device is arranged above the conveyor, the servo motor and the gear rack mechanism are fixed on the fixed frame, the servo motor, the gear rack mechanism, the first air cylinder and the pneumatic clamping jaw are arranged on the movable frame, and the movable frame is linearly moved on the fixed frame through the servo motor and the gear rack mechanism.

A stacking device for piling up and packing a bearing, the stacking device includes: in order to stack the bearings together, a platform made of aluminum alloy plates is arranged above the stacking table, and in order to package the stacked bearings together, a filling device is arranged in the middle of the stacking table.

In order to coordinate the work between the filling device and the clamping device and avoid the collision between the filling device and the clamping device, the filling device is arranged on the stacking table through the action device.

The action device includes: the second cylinder is transversely arranged on the stacking table for moving the filling device away from the lower part of the clamping device and is used for realizing the actions of applying pretightening force to the bearing and moving the filling device away from the bearing, so that the third cylinder is vertically arranged on the second cylinder, the second cylinder and the third cylinder are connected together through a supporting plate, and the connecting plate is used for fixedly connecting the filling device and the third cylinder, wherein the nozzle of the molding machine is arranged above the connecting plate and penetrates through the connecting plate, and the pressing block and the cutting device are arranged below the connecting plate and are used for applying pretightening force to the bearing.

In order to pack the stacked bearings together and to apply a supporting force to the inner contour of the bearings the filling device comprises: the blowing machine nozzle is communicated with the blowing machine, the pressing block is concentric with the blowing machine nozzle, and the cutting devices are arranged on two sides of the pressing block; the bearing is concentrically stacked and fixed together through the pressing block during operation, then a plastic film is formed in the inner contour of the bearing through blow molding of a nozzle of a blow molding machine, finally the plastic film is sealed and cut through the cutting device to form an air bag in the bearing, and the bearing is supported by applying supporting force to the bearing through the air bag in the bearing, so that the effects of stacking and packaging the bearing together and supporting and protecting the inner contour of the bearing are achieved.

In order to apply pre-tightening force to the bearing and ensure the matching between the pressing block and the cutting device, the pressing block and the cutting device are elastically connected and arranged below the action device through a spring during installation.

The cutting device includes: the cutting knife and the clamping block are used for sealing and cutting off the plastic film, in order to execute the cutting-off action, the cutting knife and the clamping block are installed on the fourth cylinder and the fifth cylinder, wherein the cutting knife is divided into a fixed block fixed on the fourth cylinder and an elastic block elastically connected with the fixed block in order to realize the sealing function, a cutting edge is designed on the fixed block in order to realize the cutting-off function, and the contact surfaces among the fixed block, the cutting edge, the elastic block, the clamping block and the clamping block are mutually in sliding connection in order to ensure the stable work.

In order to ensure that the clamping device can accurately clamp the bearing on the conveyor, a camera with a visual identification function is arranged above the conveyor, and in order to ensure that the visual field of the camera is clear, the camera is arranged in the middle position above the conveyor.

In order to accurately control the clamping device and the stacking device, the clamping device and the stacking device can work in a coordinated manner, a main control computer electrically connected with the stacking device, the clamping device and the camera is installed on one side of the conveyor, and the main control computer and the stacking device are installed on the same side in order to facilitate a worker to observe the working and running conditions of the equipment.

The assembling process comprises the following steps: firstly fix rack and pinion mechanism on the mount, then rotate servo motor and rack and pinion mechanism and be connected, then will remove the frame and be connected with gear revolve to with servo motor and removal frame fixed connection, then install first cylinder and pneumatic clamping jaw on removing the frame after with first cylinder and pneumatic clamping jaw fixed connection, accomplish the assembly of getting the device so far.

Then, the cutting device and the pressing block are arranged below the connecting plate, the nozzle of the blow molding machine is arranged above the connecting plate, the nozzle penetrates through the connecting plate and is concentric with the pressing block, then the connecting plate is arranged below the third cylinder, the third cylinder is arranged on the supporting plate, the supporting plate is arranged on the second cylinder, and the filling device is assembled.

Then the camera is arranged above the conveyor, then the clamping device is arranged above the conveyor, the clamping device is arranged behind the camera, then the stacking device and the main control computer are arranged on one side of the conveyor, and the clamping device, the stacking device and the camera are electrically connected with the main control computer, so that the assembly of the bearing stacking and packaging equipment is completed.

The working principle is as follows: the bearing is first placed on a conveyor, which transports the bearing to the gripping device.

Then the camera detects the position of the bearing, the position of the bearing is sent to a main control computer, the main control computer calculates the position of the bearing, the clamping device is controlled to move to the position of the calculated bearing, the bearing is clamped through the air claw, the bearing is conveyed to a preset position of the stacking table, and the number of the clamped bearings is recorded.

And then the main control computer controls the second cylinder to extend out, so that the nozzle of the blow molding machine, the pressing block and the bearing are concentric, and then the third cylinder extends out and fixes the bearing through the pressing block.

And then when the gas claw clamps a bearing again, the third cylinder is firstly retracted, then the second cylinder is retracted to avoid collision between the clamping device and the filling device, and after the gas claw puts down the bearing again and leaves the upper part of the bearing, the step of the third step is repeated again to fix the bearing.

Then when the bearings on the stacking table are accumulated to a certain number, the pressing block presses on the bearing at the uppermost layer to fix the bearing, and then a nozzle of the blow molding machine fills a plastic film into the inner contour of the bearing.

Then after the plastic film fills up the inner contour of the bearing, the fourth cylinder and the fifth cylinder extend out to enable the clamping block and the elastic block to be abutted first, and then the cutting edge extends out from the upper part of the elastic block and is in sliding connection with the upper part of the clamping block to seal and cut off the plastic film.

And finally, the stacking device leaves from the position of the bearing, the stacked and packaged bearing is manually taken out, and the number of the stacked and packaged bearings is recorded by a master control computer.

The packed bearing achieves the effects of connection, support and impact resistance through the supporting force of the air bag formed by the plastic film.

In a further embodiment, for the straightness of the operation of the fourth cylinder and the fifth cylinder, a vertical plate is slidably connected to the rear of each of the fourth cylinder and the fifth cylinder, and each vertical plate is fixed below the connecting plate to provide supporting force for the fourth cylinder and the fifth cylinder.

In a further embodiment, a through groove is formed on the side surface of the pressing block for the working straightness of the clamping block and the cutter, so that the clamping block and the cutter are connected with the pressing block in a sliding mode in the through groove and work in the through groove.

In a further embodiment, in order to enable the bearing to be concentric with the briquette and blow moulding machine nozzle so that the plastic film can be smoothly formed into the air-bag, the inner profile of the bottom end of the briquette is chamfered, the outer diameter of the chamfer being greater than the outer diameter of the bearing, enabling a guiding action for the bearing.

In a further embodiment, in order to improve the working accuracy and the radial force resistance of the first cylinder, the second cylinder and the third cylinder and prolong the service life of the equipment, linear slide rails are arranged on one sides of the first cylinder, the second cylinder and the third cylinder, and the telescopic rods of the first cylinder, the second cylinder and the third cylinder are further limited.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the embodiments, and various equivalent changes can be made to the technical solution of the present invention within the technical idea of the present invention, and these equivalent changes are within the protection scope of the present invention.

Claims

1. The utility model provides a bearing stacking and packing equipment which characterized in that includes: conveyor (1), install and get device (2) in pressing from both sides of conveyer (1) top, it includes to get device (2) to press from both sides: the stacking device comprises a gear rack mechanism (21) which is arranged above the conveyor (1) and the stacking device (3) in parallel, a moving frame (22) which is rotationally connected with a gear, a servo motor (23) which is fixedly connected with the moving frame (22), a first air cylinder (24) which is fixedly connected with the moving frame (22), and a pneumatic clamping jaw (25) which is fixed below the first air cylinder (24), wherein the servo motor (23) is rotationally connected with the gear;

install in conveyer (1) one side, press from both sides stacking device (3) of getting device (2) below, stacking device (3) include: a stacking table (31) fixedly mounted on one side of the conveyor (1), and a filling device (32) mounted above a middle position of the stacking table (31), wherein the filling device (32) comprises: the blow molding machine comprises an action device (321) arranged on a stacking table (31), a blow molding machine nozzle (6) arranged on the action device (321), a pressing block (33) which is arranged below the action device (321) and is concentric with the blow molding machine nozzle (6), and cutting devices (34) which are arranged on two sides of the pressing block (33) below the action device (321), wherein the blow molding machine nozzle (6) is communicated with the blow molding machine, and the pressing block (33) and the cutting devices (34) are respectively and elastically connected with the action device (321);

a camera (4) mounted above the gripping device (2), the camera (4) being located in an intermediate position of the conveyor (1), wherein the camera (4) has a visual recognition function;

and the master control computer (5) is arranged on the same side with the stacking device (3), and the master control computer (5) is electrically connected with the stacking device (3), the clamping device (2) and the camera (4).

2. The bearing stacking and packaging device of claim 1, wherein: the action device (321) includes: the device comprises a second cylinder (3211) transversely and fixedly mounted above the stacking table (31), a supporting plate (3212) which moves linearly on the second cylinder (3211), a third cylinder (3213) vertically mounted on the supporting plate (3212), and a connecting plate (3214) which moves linearly below the third cylinder (3213);

the blow molding machine nozzle (6) is arranged above the connecting plate (3214), and the pressing block (33) and the cutting device (34) are arranged below the connecting plate (3214).

3. The bearing stacking and packaging device of claim 2, wherein: the cutting device (34) comprises: the fourth cylinder (341) and the fifth cylinder (342) are elastically connected with the connecting plate (3214) and are respectively installed on two sides of the pressing block (33), the cutter (343) moves linearly on the fourth cylinder (341), and the clamping block (344) moves linearly on the fifth cylinder (342), wherein the cutter (343) and the clamping block (344) are respectively in sliding connection with the pressing block (33), and the cutter (343) is matched with the clamping block (344).

4. The bearing stacking and packaging device of claim 3, wherein: two vertical plates are fixedly mounted below the connecting plate (3214), are located behind the fourth air cylinder (341) and the fifth air cylinder (342), and are in sliding connection with the fourth air cylinder (341) and the fifth air cylinder (342).

5. The bearing stacking and packaging device of claim 3, wherein: the cutter (343) comprises: the device comprises a fixed block (3431) which moves linearly on a fourth cylinder (341) and an elastic block (3433) which is elastically connected with the fixed block (3431), wherein a knife edge (3432) extends above the fixed block (3431), the knife edge (3432) is connected with the elastic block (3433) in a sliding manner, the distance from the knife edge (3432) to the bottom end of the fixed block (3431) is greater than the distance from the surface of the elastic block (3433) to the bottom end of the fixed block (3431) when the elastic block (3433) is compressed, and the distance from the knife edge (3432) to the bottom end of the fixed block (3431) is less than the distance from the surface of the elastic block (3433) to the bottom end of the fixed block (3431) when the elastic block (3433;

the clamp block (344) is the same shape as the spring block (3433), wherein the blade (3432) is slidably connected with the clamp block (344).

6. The bearing stacking and packaging device of claim 5, wherein: a through groove is formed in the side face of the pressing block (33), and the width of the through groove is larger than the inner diameter of the pressing block (33) and smaller than the outer diameter of the pressing block (33); the cutting knife (343) and the clamping block (344) are installed in the through groove and are in sliding connection with the through groove.

7. The bearing stacking and packaging device of claim 6, wherein: the inner contour of the bottom end of the pressing block (33) is chamfered, and the outer diameter of the chamfer is larger than that of the bearing (7).

8. The bearing stacking and packaging device of claim 7, wherein: linear slide rails are installed on one sides of the first air cylinder (24), the second air cylinder (3211) and the third air cylinder (3213), and the pneumatic clamping jaw (25), the supporting plate (3212) and the connecting plate (3214) move linearly on the linear slide rails.

9. A stacking and packing method of a bearing stacking and packing device is characterized by comprising the following steps: the first step is as follows: firstly, the bearing (7) is placed on the conveyor (1), and the bearing (7) is transported to the clamping device (2) by the conveyor (1);

the second step is that: the camera (4) detects the position of the bearing (7), sends the position of the bearing (7) to the main control computer (5), calculates the position of the bearing (7) by the main control computer (5), controls the clamping device (2) to move to the position of the calculated bearing (7), clamps the bearing (7) through the air claw, conveys the bearing (7) to a preset position of the stacking table (31), and records the number of the clamped bearings (7);

the third step: the main control computer (5) controls the second air cylinder (3211) to extend out, so that the nozzle (6) and the pressing block (33) of the blow molding machine are concentric with the bearing (7), and then the third air cylinder (3213) extends out to fix the bearing (7) through the pressing block (33);

the fourth step: when the pneumatic claw clamps a bearing (7) again, the third air cylinder (3213) is retracted, then the second air cylinder (3211) is retracted to avoid collision between the clamping device (2) and the filling device (32), and after the pneumatic claw puts down the bearing (7) again and leaves above the bearing (7), the step of the third step is repeated again to fix the bearing (7);

the fifth step: when the bearings (7) on the stacking table (31) are accumulated to a certain number, the pressing block (33) presses the bearing (7) on the uppermost layer to fix the bearing (7), and then the nozzle (6) of the blow molding machine fills a plastic film into the inner contour of the bearing (7);

and a sixth step: after the plastic film fills the inner contour of the bearing (7), the fourth air cylinder (341) and the fifth air cylinder (342) extend out, so that the clamping block (344) and the elastic block (3433) are abutted, and then the blade (3432) extends out from the upper part of the elastic block (3433) and is in sliding connection with the upper part of the clamping block (344) so as to seal and cut the plastic film;

the seventh step: the stacking device (3) leaves from the position of the bearing (7), the stacked and packaged bearing (7) is taken out manually, and the main control computer (5) records the number.