In-mold injection patch blow molding mold and method

Abstract

The present invention discloses an in-mold injection molding patch blow molding mold and method in the field of blow molding waste recycling technology, a molding mold and a cutting device whose mounting frame can reciprocate between the mounting frames, and the cutting device comprises: a rotating frame, the rotating frame is rotatably arranged on one side of the mounting frame, the rotating frame can move horizontally as the molding mold is opened and closed, the rotating frame moves toward the middle position of the molding mold when the molding mold is closed, and the rotating frame moves away from the workpiece cutting knife when the molding mold is parted, the cutting knife is rotatably mounted at the lower end of the rotating frame, and the cutting knife can rotate on the outer surface of the waste section; a front grinding part and a rear grinding part, the front grinding part and the rear grinding part are both arranged at the lower end of the rotating frame through an elastic connection component, the present invention can ensure the integrity of the waste cutting and the flatness of the cutting surface, and accurately collect the cut waste to avoid splashing of the cut material and other interference with the internal parts of the device.

Description

Technical Field

[0001] The invention relates to the technical field of blow molding waste recycling, in particular to an in-mold injection patch blow molding mold and a method. Background Art

[0002] After the blow molding is completed by the blow molding mechanism, the edge of the finished workpiece contains a waste segment, and external force is needed to separate the waste segment from the workpiece segment in order to move the final finished workpiece.

[0003] Existing mold forming waste collection generally uses a cutting knife to cut the waste or directly grinds away the waste segment through grinding equipment. The cutting knife separates the waste segment and the finished product segment of the workpiece through shearing force. During the shearing process, after the shearing force is applied to the surface of the workpiece, the force at the cutting point is uneven and cracks are easily extended to the outside (such as Figure 6 The left side), which makes it difficult to ensure the flatness of the cutting surface of the waste segment and the finished product segment during cutting. Not only is it possible that the waste segment cannot be completely removed and collected, it may even damage the workpiece itself. In addition, the upper waste segment is prone to cracking at the end of the cutting process. The cracked waste segment may enter the equipment and interfere with the continuous operation of the equipment, and it is impossible to ensure that the cutting waste is accurately put into the waste collection equipment. When the grinding equipment grinds the waste, although the surface of the workpiece fracture can be guaranteed to be flat, the dust generated by grinding is large, and the grinding dust waste is difficult to collect in a centralized manner, which not only pollutes the environment, but even the dust waste can enter the parts of the processing equipment and damage the service life of the parts. Summary of the Invention

[0004] The technical problem of the present invention is to provide an in-mold injection molding patch blow molding mold and method to ensure the integrity of waste cutting and the flatness of the cutting surface, and to accurately collect the cut waste to avoid splashing of the cut material and other interference with the internal parts of the device.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an in-mold injection molding patch blow molding mold, a mounting frame, a molding mold capable of reciprocating between the mounting frames, and a cutting device, wherein an extrusion mechanism and a blow molding mechanism are provided in the mounting frame, and the cutting device comprises:

[0006] A rotating frame, the rotating frame being rotatably mounted on one side of the mounting frame, the rotating frame being capable of horizontally moving in response to the opening and closing of the forming mold, the rotating frame moving toward the middle of the forming mold when the forming mold is closed, and moving away from the workpiece when the forming mold is parted;

[0007] A cutting knife, the cutting knife being rotatably mounted on the lower end of the rotating frame, and the cutting knife being capable of rotating on the outer surface of the waste segment;

[0008] A front grinding member and a rear grinding member, both of which are arranged at the lower end of the rotating frame through an elastic connection component. During processing, the front grinding member and the rear grinding member are respectively located on the inner and outer sides of the waste segment with the cutting knife. The front grinding member and the rear grinding member can automatically abut against the inner wall of the waste segment during cutting to reduce the possibility of deformation of the waste segment and the workpiece caused by the rotation of the cutting knife;

[0009] The grinding disc is fixedly mounted on the front grinding piece and the rear grinding piece and its lower surface is flush with the lower surface of the cutting knife. The grinding disc on the front grinding piece can grind a horizontal fracture crack on the inner wall of the connection between the waste section and the workpiece section before the cutting knife cuts.

[0010] As a further solution of the present invention, the cutting blade can rotate 180 degrees along with the horizontal movement of the rotating frame under the action of the transmission assembly, and the transmission assembly includes:

[0011] A lower tooth plate, the lower tooth plate being fixedly mounted on the mounting frame and being kept level with the opening and closing movement path of the forming die;

[0012] a lower gear, the lower gear being fixedly mounted on the cutting blade and being capable of meshing with the lower tooth plate when the rotating frame moves horizontally;

[0013] A collecting bin is provided in the mounting frame corresponding to the lower portion of the rotating frame, a mounting shaft is rotatably mounted on the mounting frame corresponding to the position of the collecting bin and close to the side of the lower tooth plate, a rotating baffle is fixedly mounted on the mounting shaft and is located in the middle of the rotating baffle, the lower end of the rotating baffle is located in the collecting bin, and when the forming mold is parted, the rotating baffle can tilt toward the collecting bin under the extrusion action.

[0014] As a further solution of the present invention, the upper end of the rotating frame is rotatably installed with a rotating seat, and the rotating seat is rotatably installed with a mounting frame, an upper cylinder is fixedly installed on the mounting frame, and an upper tooth plate is fixedly installed on the output end of the upper cylinder, and an upper gear is fixedly installed on the upper end of the rotating frame, and the upper gear is meshed with the upper tooth plate. A limited seat is slidably connected to the mounting frame, one end of the limited seat is fixedly connected to the mounting frame, and the end of the limited seat away from the mounting frame is connected to the upper end of the rotating baffle through a telescopic connecting frame, and a limiting slot is provided on the mounting frame, and the telescopic connecting frame can slide in the limiting slot.

[0015] As a further solution of the present invention, the front grinding piece and the rear grinding piece both include:

[0016] A grinding roller, wherein the grinding disc is fixedly mounted on the outer surface of the grinding roller, and the outer surface of the grinding roller can be attached to the inner walls of the waste section and the workpiece section;

[0017] A rotating shaft, the rotating shaft being fixedly mounted on the upper surface of the grinding roller;

[0018] The elastic connection assembly includes a limit spring, which is arranged on the upper end of the rotating shaft through a movable plate. The movable plates are each provided with a motor capable of driving the rotating shaft to rotate;

[0019] The end of the limit spring away from the rotating shaft is fixedly installed with a connecting plate, and a sliding rod is slidably installed on the connecting plate corresponding to the position of the limit spring. One end of the sliding rod is fixedly connected to the front grinding piece and the rear grinding piece, and a connecting column is fixedly installed at the lower end of the connecting plate, and the connecting column is arranged at the lower end of the rotating frame.

[0020] As a further embodiment of the present invention, the forming mold includes a forming cavity and a cutting cavity, the forming cavity and the cutting cavity are arranged in parallel, and the upper end of the cutting cavity is lower than the forming cavity. Transport equipment is provided on both sides of the forming mold, and the transport equipment includes:

[0021] Threaded rods, the threaded rods being arranged on both sides of the forming mold and the molds of the forming mold being threadedly connected to the threaded rods on both sides, the threaded rods on both sides being able to rotate synchronously to drive the forming mold to flow between the extrusion mechanism, the blow molding mechanism and the cutting device;

[0022] The lower cylinder is provided with multiple groups and is fixedly installed in the mounting frame at positions corresponding to the ends of the threaded rods. The threaded rods are rotatably connected to the output ends of the lower cylinders and move relative to each other between the lower cylinders on both sides of the threaded rods.

[0023] As a further solution of the present invention, the extrusion mechanism is arranged on one side of the mounting frame, the blow molding mechanism is arranged between the cutting device and the extrusion mechanism, a conveyor belt is provided on the side of the mounting frame away from the extrusion mechanism, and a support platform is provided on the mounting frame at a position corresponding to the cutting device, and the upper surface of the support platform is kept level with the conveyor belt.

[0024] As a further solution of the present invention, a driving motor is provided at one end of the lower cylinder, and an output end of the driving motor is fixedly connected to the threaded rod.

[0025] An in-mold injection molding patch blow molding method, the specific steps of the injection molding patch blow molding method are as follows:

[0026] Step 1: Plastic particles are extruded into a tube through an extruder and enter the molding cavity of the molding die;

[0027] Step 2: The molding die moves the molding cavity to the bottom of the blow molding mechanism under the action of the transportation equipment for blow molding;

[0028] Step 3: After the blow molding mechanism completes the blow molding, the mold is separated, and the transport equipment drives the molding cavity of the forming mold back to the position of the extrusion mechanism. At this time, the blow-molded product is under the blow molding mechanism;

[0029] Step 4: The mold is closed again and the extrusion mechanism guides the material into the molding cavity again, and the finished product is clamped into the cutting cavity. After the mold is closed, the cutting device moves to the center position of the mold;

[0030] Step 5: The transport device drives the molding cavity to move to the bottom of the blow molding mechanism again. At this time, the finished product is in the cutting cavity and moves to the bottom of the cutting device;

[0031] Step 6: The rotating frame rotates to drive the cutting knife to cut the surface of the waste segment;

[0032] Step 7: After cutting, the mold is split again. After splitting, the molding die is squeezed to tilt the rotating baffle. The tilted rotating baffle drives the rotating frame to move, so that the cutting knife and the post-grinding part clamp the cut waste segment close to the rotating baffle, so that the waste segment falls accurately into the collection bin along the tilted movable baffle.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention cuts the waste segment by the cutting knife, and the front grinding piece and the rear grinding piece are introduced into the inner wall of the waste segment, and the cutting knife is on the outer wall of the waste segment. The rotating frame rotates to drive the cutting knife to rotate around the outside of the waste segment. During the rotation, the front grinding piece pre-cuts a horizontal cutting gap at the connection between the waste segment and the workpiece segment, and then the cutting knife completely cuts the connection between the waste segment and the workpiece segment, reducing the problem of irregular cracking easily caused by direct cutting, avoiding the possibility of uneven cutting surface, incomplete waste cutting, and even damage to the workpiece. For the cutting surface after the cutting knife completes the cutting, the grinding disc of the rear grinding piece is squeezed into the cutting surface, and the cutting surface is ground by the cutting surface to eliminate burrs generated by cutting the cutting surface, etc., to ensure that the surface of the cut surface of the workpiece is flat and smooth, and during the cutting process, the waste segment is always between the cutting knife and the front grinding piece and the rear grinding piece, avoiding the problem of waste splashing and dust flying due to cutting, thereby avoiding the problem of splashing waste interfering with the normal operation of the equipment.

[0035] After the cutting is completed in the present invention, the forming mold is split again. During the splitting process, one side of the mold squeezes the upper side of the rotating baffle, causing the rotating baffle to rotate and tilt around the mounting axis. The tilting of the rotating baffle drives the rotating frame and the forming mold to move synchronously, and then the waste segment between the cutting knife and the front polishing piece and the rear polishing piece moves toward the rotating baffle. During the movement, the lower gear interacts with the lower gear plate, thereby driving the lower gear to rotate, and then driving the cutting knife to rotate 180 degrees away from the front polishing piece and the rear polishing piece, so that the waste segment in between can fall onto the inclined surface of the lower end of the rotating baffle under the action of gravity, so that the waste segment can enter the collection bin along the inclined surface, thereby automatically and accurately collecting the waste segment, avoiding the trouble of manual waste sorting and collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 For the present invention Figure 1 A partial schematic diagram of the structure at point A;

[0039] Figure 3 This is a schematic diagram of the side view structure of the present invention;

[0040] Figure 4 For the present invention Figure 3 A partial schematic diagram of the structure at B in the middle;

[0041] Figure 5 It is a cross-sectional view of the structure of the present invention;

[0042] Figure 6 The principle of the present invention Figure 1 ;

[0043] Figure 7 The principle of the present invention Figure 2 ;

[0044] Figure 8 It is an operation flow chart of the present invention.

[0045] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0046] 1. Mounting frame; 2. Blow molding mechanism; 3. Transport equipment; 301. Lower cylinder; 302. Threaded rod; 4. Molding mold; 401. Molding cavity; 402. Cutting cavity; 5. Collecting bin; 6. Conveyor belt; 7. Cutting equipment; 8. Limit seat; 9. Mounting frame; 10. Upper cylinder; 11. Rotating seat; 12. Rotating frame; 13. Upper tooth plate; 14. Upper gear; 15. Cutting knife; 16. Lower gear; 17. Lower tooth plate; 18. Connecting column; 19. Connecting plate; 20. Rear grinding part; 21. Sliding rod; 22. Limit spring; 23. Rotating shaft; 24. Grinding roller; 25. Grinding disc; 26. Front grinding part; 27. Mounting shaft; 28. Limit slot; 29. ​​Extrusion mechanism; 30. Rotating baffle; 31. Support platform; 32. Retractable connecting frame. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0048] See also Figures 1-8 The present invention provides a technical solution: an in-mold injection molding patch blow molding mold, a mounting frame 1, a molding die 4 capable of reciprocating between the mounting frames 1, and a cutting device 7. The mounting frame 1 is provided with an extrusion mechanism 29 and a blow molding mechanism 2. The cutting device 7 includes:

[0049] The rotating frame 12 is rotatably arranged on one side of the mounting frame 1. The rotating frame 12 can move horizontally as the forming mold 4 opens and closes. When the forming mold 4 is closed, the rotating frame 12 moves toward the middle position of the forming mold 4. When the forming mold 4 is opened, the rotating frame 12 moves away from the workpiece.

[0050] The cutting knife 15 is rotatably mounted on the lower end of the rotating frame 12, and the cutting knife 15 can rotate on the outer surface of the waste segment;

[0051] The front grinding piece 26 and the rear grinding piece 20 are both arranged at the lower end of the rotating frame 12 through an elastic connection component. During processing, the front grinding piece 26 and the rear grinding piece 20 and the cutting knife 15 are respectively located on the inner and outer sides of the waste segment. The front grinding piece 26 and the rear grinding piece 20 can automatically abut against the inner wall of the waste segment during cutting to reduce the possibility of deformation of the waste segment and the workpiece caused by the rotation of the cutting knife 15;

[0052] The grinding disc 25 is fixedly mounted on the front grinding piece 26 and the rear grinding piece 20 and its lower surface is flush with the lower surface of the cutting knife 15. The grinding disc 25 on the front grinding piece 26 can grind a horizontal fracture in the inner wall of the connection between the waste section and the workpiece section before the cutting knife 15 cuts.

[0053] During operation, when the present invention cuts the waste segment by the cutting blade 15, the front grinding piece 26 and the rear grinding piece 20 are introduced into the inner wall of the waste segment (such as Figure 4 As shown, the front grinding member 26 and the rear grinding member 20 are in contact with the surface of the waste segment under the action of the limit spring 22), the cutting knife 15 is on the outer wall of the waste segment, and the rotation of the rotating frame drives the cutting knife 15 to rotate around the outside of the waste segment. During the rotation, the front grinding member 26 pre-cuts a horizontal cutting gap at the connection between the waste segment and the workpiece segment, and then the cutting knife 15 completely cuts the connection between the waste segment and the workpiece segment. When cutting, the cutting knife 15 can cut along the cutting gap of the front grinding member 26 to avoid the problem of irregular cracking caused by direct cutting, avoid the possibility of uneven cutting surface, incomplete waste cutting, and even damage to the workpiece, and for the cutting surface after the cutting knife 15 completes the cutting, the grinding disc 25 of the rear grinding member 20 is squeezed into the cutting surface (as shown in FIG. Figure 7 As shown in the figure below, the grinding disc 25 of the front grinding piece 26 is attached to the upper surface of the cutting surface under the action of the limit spring 22). The cutting surface is ground to eliminate burrs generated by cutting the cutting surface, ensuring that the surface of the workpiece cutting surface is flat and smooth. During the cutting process, the waste section is always between the cutting knife 15 and the front grinding piece 26 and the rear grinding piece 20, avoiding the problem of waste flying and dust flying due to cutting, thereby avoiding the problem of flying waste interfering with the normal operation of the equipment.

[0054] As a further solution of the present invention, the cutting blade 15 can rotate 180 degrees with the horizontal movement of the rotating frame 12 under the action of the transmission assembly, and the transmission assembly includes:

[0055] The lower tooth plate 17 is fixedly mounted on the mounting frame 1 and is kept level with the opening and closing movement path of the forming mold 4;

[0056] The lower gear 16 is fixedly mounted on the cutting blade 15 and can mesh with the lower tooth plate 17 when the rotating frame 12 moves horizontally;

[0057] A collecting bin 5 is provided below the corresponding rotating frame 12 in the mounting frame 1, and a mounting shaft 27 is rotatably installed on the mounting frame 1 at a position corresponding to the collecting bin 5 and close to the side of the lower tooth plate 17. A rotating baffle 30 is fixedly mounted on the mounting shaft 27 and the mounting shaft 27 is located in the middle position of the rotating baffle 30. The lower end of the rotating baffle 30 is in the collecting bin 5, and when the molding mold 4 is parted, the rotating baffle 30 can be tilted toward the collecting bin 5 at its lower end under the extrusion action.

[0058] During operation, after the cutting is completed, the forming mold 4 is separated again (the lower cylinder 301 contracts to drive the threaded rods 302 away from each other, thereby driving the forming molds 4 to separate from each other). When separating the molds, one side of the mold squeezes the upper side of the rotating baffle 30, so that the rotating baffle 30 rotates and tilts around the mounting axis 27. The tilting of the rotating baffle 30 drives the rotating frame 12 and the forming mold 4 to move synchronously (the upper end of the rotating baffle 30 pulls the limiting seat 8 through the retractable connecting frame 32, and the limiting seat 8 pulls the mounting frame 9 to move, and the mounting frame 9 drives the rotating frame 12 to move, so that the rotating frame 12 is close to the rotating baffle 30). ), and then the waste segment between the cutting knife 15 and the front grinding piece 26 and the rear grinding piece 20 moves toward the rotating baffle 30. During the movement, the lower gear 16 interacts with the lower tooth plate 17, thereby driving the lower gear 16 to rotate, and then driving the cutting knife 15 to rotate 180 degrees away from the front grinding piece 26 and the rear grinding piece 20, so that the waste segment in the meantime can fall onto the inclined surface of the lower end of the rotating baffle 30 under the action of gravity, so that the waste segment can enter the interior of the collection bin 5 along the inclined surface, thereby automatically and accurately collecting the waste segment, avoiding the trouble of manual waste sorting and collection.

[0059] As a further solution of the present invention, a rotating seat 11 is rotatably installed on the upper end of the rotating frame 12, and a mounting frame 9 is rotatably installed on the rotating seat 11. An upper cylinder 10 is fixedly installed on the mounting frame 9, and an upper tooth plate 13 is fixedly installed on the output end of the upper cylinder 10. An upper gear 14 is fixedly installed on the upper end of the rotating frame 12, and the upper gear 14 is engaged with the upper tooth plate 13. A limiting seat 8 is slidably connected to the mounting frame 1, and one end of the limiting seat 8 is fixedly connected to the mounting frame 9. The end of the limiting seat 8 away from the mounting frame 9 is connected to the upper end of the rotating baffle 30 through a telescopic connecting frame 32. A limiting slot 28 is provided on the mounting frame 1, and the telescopic connecting frame 32 can slide in the limiting slot 28.

[0060] During operation, the upper end of the rotating baffle 30 pulls the limit seat 8 through the retractable connecting frame 32, and then the limit seat 8 pulls the mounting frame 9 to move, and then the mounting frame 9 drives the rotating frame 12 to move, so that the rotating frame 12 is close to the rotating baffle 30, and the upper cylinder 10 retracts and drives the upper gear plate 13 to move horizontally. The upper gear plate 13 moves horizontally and interacts with the upper gear 14. The rotation of the upper gear 14 drives the rotating seat 11 to rotate, and the rotation of the rotating seat 11 drives the rotating frame 12 to rotate.

[0061] As a further embodiment of the present invention, the front grinding member 26 and the rear grinding member 20 both include:

[0062] The grinding roller 24 and the grinding disc 25 are fixedly mounted on the outer surface of the grinding roller 24 , and the outer surface of the grinding roller 24 can be attached to the inner wall of the waste section and the workpiece section;

[0063] The rotating shaft 23 is fixedly mounted on the upper surface of the grinding roller 24;

[0064] The elastic connection assembly includes a limit spring 22, which is arranged at the upper end of the rotating shaft 23 through a movable plate. A motor is provided on the movable plate, and the motor can drive the rotating shaft 23 to rotate. The end of the limit spring 22 away from the rotating shaft 23 is fixedly installed with a connecting plate 19, and a sliding rod 21 is slidably installed on the connecting plate 19 at the position corresponding to the limit spring 22. One end of the sliding rod 21 is fixedly connected to the front grinding part 26 and the rear grinding part 20. The lower end of the connecting plate 19 is fixedly installed with a connecting column 18, and the connecting column 18 is arranged at the lower end of the rotating frame 12.

[0065] During operation, the limit spring 22 can ensure that the edges of the front grinding roller 24 and the grinding disc 25 always contact the inner wall of the waste section.

[0066] As a further embodiment of the present invention, the forming mold 4 includes a forming cavity 401 and a cutting cavity 402. The forming cavity 401 and the cutting cavity 402 are arranged in parallel, and the upper end height of the cutting cavity 402 is lower than that of the forming cavity 401. Transport equipment 3 is provided on both sides of the forming mold 4. The transport equipment 3 includes:

[0067] Threaded rods 302 are provided on both sides of the forming mold 4 and the molds of the forming mold 4 are respectively threadedly connected to the threaded rods 302 on both sides. The threaded rods 302 on both sides can rotate synchronously to drive the forming mold 4 to flow between the extrusion mechanism 29, the blow molding mechanism 2 and the cutting device 7;

[0068] The lower cylinder 301 is provided with multiple groups and is fixedly installed in the mounting frame 1 at positions corresponding to the ends of the threaded rods 302. The threaded rods 302 are rotationally connected to the output ends of the lower cylinders 301 and move relative to each other between the lower cylinders 301 on both sides of the threaded rods 302.

[0069] During operation, the lower cylinder 301 contracts and drives the threaded rods 302 to move away from each other, thereby driving the forming molds 4 to separate from each other.

[0070] As a further solution of the present invention, the extrusion mechanism 29 is arranged on one side of the mounting frame 1, the blow molding mechanism 2 is arranged between the cutting device 7 and the extrusion mechanism 29, a conveyor belt 6 is provided on the side of the mounting frame 1 away from the extrusion mechanism 29, and a support platform 31 is provided on the mounting frame 1 at a position corresponding to the cutting device 7, and the upper surface of the support platform 31 is kept level with the conveyor belt 6.

[0071] During operation, the finished parts after cutting are on the support table 31 . When the forming mold 4 moves to the position of the cutting device 7 again, the forming mold 4 pushes the finished parts on the support table 31 to move to the conveyor belt 6 .

[0072] A driving motor is provided at one end of the lower cylinder 301 , and an output end of the driving motor is fixedly connected to the threaded rod 302 .

[0073] During operation, the driving motor is a bidirectional motor. The driving motor drives the threaded rod 302 to rotate, and the threaded rod 302 rotates to drive the forming mold 4 threadedly connected thereto to move.

[0074] An in-mold injection molding patch blow molding method, the specific steps of the injection molding patch blow molding method are as follows:

[0075] Step 1: Plastic particles are extruded into a tube through the extrusion mechanism 29 and enter the molding cavity 401 of the molding die 4;

[0076] Step 2: The molding die 4 moves the molding cavity 401 to the bottom of the blowing mechanism 2 under the action of the transport device 3 for blow molding;

[0077] Step 3: After the blow molding is completed, the blow molding mechanism 2 is separated from the mold, and the transport device 3 drives the molding cavity 401 of the molding die 4 back to the position of the extrusion mechanism 29. At this time, the blow-molded product is under the blow molding mechanism 2.

[0078] Step 4: The mold is closed again and the extrusion mechanism 29 guides the material into the molding cavity 401 again, and the finished product is clamped into the cutting cavity 402. After the mold is closed, the cutting device 7 moves to the middle position of the mold;

[0079] Step 5: The transport device 3 drives the molding chamber 401 to move to the bottom of the blow molding mechanism 2 again. At this time, the finished product is in the cutting chamber 402 and moves to the bottom of the cutting device 7;

[0080] Step 6: The rotating frame 12 rotates to drive the cutting blade 15 to cut the surface of the waste segment;

[0081] Step 7: After cutting, the mold is separated again. After the mold is separated, the forming mold 4 is squeezed to tilt the rotating baffle 30. The tilted rotating baffle 30 drives the rotating frame 12 to move, so that the cutting knife 15 and the post-grinding part 20 clamp the cut waste segment close to the rotating baffle 30, so that the waste segment falls accurately into the collection bin 5 along the tilted movable baffle 30.

Claims

1. An in-mold injection molding patch blow molding mold, comprising a mounting frame (1), a molding mold (4) capable of reciprocating between the mounting frame (1), and a cutting device (7), wherein an extrusion mechanism (29) and a blow molding mechanism (2) are provided in the mounting frame (1), characterized in that: The cutting equipment (7) comprises: A rotating frame (12), the rotating frame (12) is rotatably arranged on one side of the mounting frame (1), the rotating frame (12) can move horizontally as the forming mold (4) opens and closes, the rotating frame (12) moves toward the middle position of the forming mold (4) when the forming mold (4) is closed, and the rotating frame (12) moves away from the workpiece when the forming mold (4) is separated; A cutting knife (15), the cutting knife (15) being rotatably mounted on the lower end of the rotating frame (12), and the cutting knife (15) being capable of rotating on the outer surface of the waste segment; A front grinding piece (26) and a rear grinding piece (20), wherein the front grinding piece (26) and the rear grinding piece (20) are both arranged at the lower end of the rotating frame (12) through an elastic connection component. During processing, the front grinding piece (26) and the rear grinding piece (20) and the cutting knife (15) are respectively located on the inner and outer sides of the waste segment. During cutting, the front grinding piece (26) and the rear grinding piece (20) can automatically contact the inner wall of the waste segment to reduce the possibility of deformation of the waste segment and the workpiece caused by the rotation of the cutting knife (15); A grinding disc (25) is fixedly mounted on the front grinding piece (26) and the rear grinding piece (20) and its lower surface is flush with the lower surface of the cutting knife (15). The grinding disc (25) on the front grinding piece (26) can grind a horizontal fracture crack in the inner wall of the connection between the waste section and the workpiece section before the cutting knife (15) performs cutting.

2. The in-mold injection molding patch blow molding mold according to claim 1, characterized in that: The cutting blade (15) can rotate 180 degrees along with the horizontal movement of the rotating frame (12) under the action of the transmission assembly, and the transmission assembly includes: A lower tooth plate (17), the lower tooth plate (17) being fixedly mounted on the mounting frame (1) and being kept level with the opening and closing movement path of the forming die (4); a lower gear (16), the lower gear (16) being fixedly mounted on the cutting blade (15), and the lower gear (16) being capable of meshing with the lower tooth plate (17) when the lower gear (16) moves horizontally with the rotating frame (12); A collecting bin (5) is provided in the mounting frame (1) below the rotating frame (12). A mounting shaft (27) is rotatably mounted on the mounting frame (1) at a position corresponding to the collecting bin (5) and close to the lower tooth plate (17). A rotating baffle (30) is fixedly mounted on the mounting shaft (27) and is located in the middle of the rotating baffle (30). The lower end of the rotating baffle (30) is located in the collecting bin (5). When the forming mold (4) is parted, the lower end of the rotating baffle (30) can be tilted toward the collecting bin (5) under the action of extrusion.

3. The in-mold injection molding patch blow molding mold according to claim 2, characterized in that: The upper end of the rotating frame (12) is rotatably mounted with a rotating seat (11), and the rotating seat (11) is rotatably mounted with a mounting frame (9), and an upper cylinder (10) is fixedly mounted on the mounting frame (9), and an upper tooth plate (13) is fixedly mounted on the output end of the upper cylinder (10), and an upper gear (14) is fixedly mounted on the upper end of the rotating frame (12), and the upper gear (14) is meshed with the upper tooth plate (13). A limiting seat (8) is slidably connected to the mounting frame (1), and one end of the limiting seat (8) is fixedly connected to the mounting frame (9), and the end of the limiting seat (8) away from the mounting frame (9) is connected to the upper end of the rotating baffle (30) through a telescopic connecting frame (32), and a limiting slot (28) is provided on the mounting frame (1), and the telescopic connecting frame (32) can slide in the limiting slot (28).

4. The in-mold injection molding patch blow molding mold according to claim 3, characterized in that: The front grinding piece (26) and the rear grinding piece (20) both include: A grinding roller (24), wherein the grinding disc (25) is fixedly mounted on the outer surface of the grinding roller (24), and the outer surface of the grinding roller (24) can be attached to the inner walls of the waste section and the workpiece section; A rotating shaft (23), the rotating shaft (23) being fixedly mounted on the upper surface of the grinding roller (24); The elastic connection assembly includes a limit spring (22), and the limit spring (22) is arranged on the upper end of the rotating shaft (23) through a movable plate. The movable plate is provided with a motor, and the motor can drive the rotating shaft (23) to rotate; A connecting plate (19) is fixedly mounted on one end of the limit spring (22) away from the rotating shaft (23); a sliding rod (21) is slidably mounted on the connecting plate (19) at a position corresponding to the limit spring (22); one end of the sliding rod (21) is fixedly connected to the front grinding piece (26) and the rear grinding piece (20); a connecting column (18) is fixedly mounted on the lower end of the connecting plate (19); and the connecting column (18) is arranged at the lower end of the rotating frame (12).

5. The in-mold injection molding patch blow molding mold according to claim 4, characterized in that: The forming mold (4) comprises a forming cavity (401) and a cutting cavity (402), wherein the forming cavity (401) and the cutting cavity (402) are arranged in parallel, and the upper end of the cutting cavity (402) is lower than the upper end of the forming cavity (401). Transport equipment (3) is provided on both sides of the forming mold (4), and the transport equipment (3) comprises: Threaded rods (302), the threaded rods (302) being arranged on both sides of the molding die (4), and the molds of the molding die (4) being respectively threadedly connected to the threaded rods (302) on both sides, and the threaded rods (302) on both sides being able to rotate synchronously to drive the molding die (4) to flow between the extrusion mechanism (29), the blow molding mechanism (2) and the cutting device (7); The lower cylinders (301) are provided in multiple groups and are fixedly mounted in positions corresponding to the ends of the threaded rods (302) in the mounting frame (1). The threaded rods (302) are rotatably connected to the output ends of the lower cylinders (301), and the lower cylinders (301) disposed on both sides of the threaded rods (302) move relative to each other.

6. The in-mold injection molding patch blow molding mold according to claim 5, characterized in that: The extrusion mechanism (29) is arranged on one side of the mounting frame (1), the blow molding mechanism (2) is arranged between the cutting device (7) and the extrusion mechanism (29), a conveyor belt (6) is arranged on the side of the mounting frame (1) away from the extrusion mechanism (29), and a support platform (31) is arranged on the mounting frame (1) at a position corresponding to the cutting device (7), and the upper surface of the support platform (31) is kept horizontal with the conveyor belt (6).

7. The in-mold injection molding patch blow molding mold according to claim 6, characterized in that: A driving motor is provided at one end of the lower cylinder (301), and an output end of the driving motor is fixedly connected to the threaded rod (302).

8. An in-mold injection patch blow molding method, applicable to an in-mold injection patch blow molding mold according to any one of claims 1 to 7, characterized in that: The specific steps of the injection molding patch blow molding method are as follows: Step 1: The plastic particles are extruded into a tube through the extrusion mechanism (29) and enter the molding cavity (401) of the molding die (4); Step 2: The molding die (4) is moved by the transport device (3) to move the molding cavity (401) to the bottom of the blow molding mechanism (2) for blow molding; Step 3: After the blow molding mechanism (2) completes the blow molding, the mold is separated, and the transport device (3) drives the molding cavity (401) of the molding mold (4) back to the position of the extrusion mechanism (29). At this time, the blow molded product is located below the blow molding mechanism (2); Step 4: The mold is closed again and the extrusion mechanism (29) guides the material into the molding cavity (401) again, and the finished product is clamped into the cutting cavity (402). After the mold is closed, the cutting device (7) moves to the center position of the mold; Step 5: The transport device (3) drives the molding cavity (401) to move to the bottom of the blow molding mechanism (2) again. At this time, the finished product is in the cutting cavity (402) and moves to the bottom of the cutting device (7); Step 6: The rotating frame (12) rotates to drive the cutting knife (15) to cut the surface of the waste segment; Step 7: After cutting, the mold is split again. After the mold is split, the forming mold (4) is squeezed to tilt the rotating baffle (30). The tilted rotating baffle (30) drives the rotating frame (12) to move, so that the cutting knife (15) and the post-grinding piece (20) clamp the cut waste segment close to the rotating baffle (30), so that the waste segment falls accurately into the collection bin (5) along the tilted rotating baffle (30).

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