In-mold injection molding patch blowing mold and method

Abstract

The invention discloses an in-mold injection molding patch blow molding mold and method in the technical field of blow molding waste recovery, and relates to a forming mold with mounting frames capable of reciprocating between the mounting frames and material cutting equipment which comprises a rotating frame rotationally arranged on one side of the mounting frame. The rotating frame can horizontally move along with opening and closing of the forming mold, the rotating frame moves towards the middle position of the forming mold along with mold closing of the forming mold, the rotating frame is away from the workpiece cutting knife along with mold opening of the forming mold, and the cutting knife is rotationally installed at the lower end of the rotating frame and can rotate on the outer surface of the waste section; according to the waste material cutting device, the completeness of waste material cutting and the flatness of the cutting face can be guaranteed, cut waste materials are accurately collected, and the situation that cut materials splash and the like to interfere with parts in the device is avoided.

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 equipment completes the blow molding, the edge of the finished workpiece contains waste segments, and external force is needed to separate the waste segments from the workpiece segments in order to move the final finished workpiece.

[0003] Existing mold waste collection generally uses a cutting knife to cut the waste or directly grinds 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 uneven force at the cutting point is easy to expand cracks outward (such as Figure 6 The left side of the figure makes it difficult to ensure the smoothness of the cutting surfaces of the waste segment and the finished product segment. 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. It is also 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 smooth, 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 the dust waste may even 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 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 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 device are arranged in the mounting frame, and the cutting device comprises:

[0006] A rotating frame, the rotating frame is rotatably arranged on one side of the mounting frame, the rotating frame can move horizontally along with the opening and closing of the forming mold, the rotating frame moves toward the middle position of the forming mold when the forming mold is closed, and the rotating frame moves away from the workpiece when the forming mold is separated;

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

[0008] A front grinding piece and a rear grinding piece, both of which are arranged at the lower end of the rotating frame through an elastic connection component. During processing, the front grinding piece and the rear grinding piece and the cutting knife are respectively located at the inner and outer sides of the waste segment. During cutting, the front grinding piece and the rear grinding piece can automatically abut against 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;

[0009] A 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 performs cutting.

[0010] As a further solution of the present invention, the cutting knife can rotate 180 degrees 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 is fixedly mounted on the mounting frame and is 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 knife and being capable of meshing with the lower tooth plate when the lower gear moves horizontally with the rotating frame;

[0013] A collecting bin is arranged in the mounting frame below the rotating frame, and a mounting shaft is rotatably mounted on the mounting frame at a position corresponding to the collecting bin and close to 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 the lower end of the rotating baffle can be tilted toward the collecting bin under the extrusion action when the molding mold is parted.

[0014] As a further solution of the present invention, a rotating seat is rotatably installed on the upper end of the rotating frame, and a mounting frame is rotatably installed on the rotating seat. 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. 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 one 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 groove is provided on the mounting frame, and the telescopic connecting frame can slide in the limiting groove.

[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 wall of the material dividing section and the workpiece section;

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

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

[0019] A connecting plate is fixedly installed at one end of the limit spring away from the rotating shaft, 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, 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 solution of the present invention, the molding die includes a molding cavity and a cutting cavity, the molding cavity and the cutting cavity are arranged in parallel and the upper end height of the cutting cavity is lower than the molding cavity, and transportation equipment is arranged on both sides of the molding die, and the transportation equipment includes:

[0021] Threaded rods, the threaded rods are arranged on both sides of the molding die and the molds of the molding die are respectively threadedly connected to the threaded rods on both sides, and the threaded rods on both sides can rotate synchronously to drive the molding die to flow between the extrusion mechanism, the blow molding mechanism and the cutting device;

[0022] The lower cylinders are provided with multiple groups and fixedly mounted in the mounting frame at positions corresponding to the ends of the threaded rods. The threaded rods are rotationally connected to the output ends of the lower cylinders and move relatively between the lower cylinders disposed 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 arranged on the side of the mounting frame away from the extrusion mechanism, and a support platform is arranged 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: The 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 for blow molding under the action of the transport equipment;

[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 molding 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 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, and 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 separated again. After the mold is separated, the extrusion of the molding mold causes the rotating baffle to tilt. 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] 1. When the present invention cuts the waste segment by the cutting knife, the front grinding piece and the rear grinding piece are introduced into the inner wall of the waste segment, the cutting knife is on the outer wall of the waste segment, and the rotating frame rotates to drive the cutting knife to rotate around the outside of the waste segment. During the rotation process, 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, thereby 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 disk 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, thereby ensuring the flatness and smoothness of the cutting surface of the workpiece. During the cutting process, the waste segment is always between the cutting knife and the front grinding piece and the rear grinding piece, thereby avoiding the problem of waste splashing and dust floating due to cutting, thereby avoiding the problem of splashing waste interfering with the normal operation of the equipment.

[0035] 2. In the present invention, after the cutting is completed, the forming mold is separated again. During the separation, one side of the mold squeezes the upper side of the rotating baffle, so that the rotating baffle rotates and tilts around the installation axis. The inclination 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 grinding piece and the rear grinding 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, thereby driving the cutting knife to rotate 180 degrees away from the front grinding piece and the rear grinding 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 collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying 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 A in the middle;

[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 structural cross-sectional view 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 piece; 21. Sliding rod; 22. Limit spring; 23. Rotating shaft; 24. Grinding roller; 25. Grinding disc; 26. Front grinding piece; 27. Mounting shaft; 28. Limit slot; 29. ​​Extrusion mechanism; 30. Rotating baffle; 31. Support table; 32. Retractable connecting frame. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0048] See also Figure 1-Figure 8 The present invention provides a technical solution: an in-mold injection molding patch blow molding mold, a mounting frame 1, a molding mold 4 that can reciprocate between the mounting frames 1, and a cutting device 7, wherein an extrusion mechanism 29 and a blow molding device 2 are arranged in the mounting frame 1, and the cutting device 7 comprises: The rotating frame 12 is rotatably arranged on one side of the mounting frame 1. The rotating frame 12 can move horizontally along with the opening and closing of the molding die 4. When the molding die 4 is closed, the rotating frame 12 moves toward the middle position of the molding die 4. When the molding die 4 is separated, the rotating frame 12 moves away from the workpiece.

[0050] A cutting knife 15, 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 at the inner and outer sides of the waste segment. The front grinding piece 26 and the rear grinding piece 20 can automatically contact 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 crack on the inner wall of the connection between the waste section and the workpiece section before the cutting knife 15 starts cutting.

[0053] When the present invention is working, when the cutting blade 15 is used to cut the waste segment, 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 piece 26 and the rear grinding piece 20 are in contact with the surface of the waste segment under the action of the limit spring 22, and the cutting knife 15 is on the outer wall of the waste segment. The rotating frame rotates to drive the cutting knife 15 to rotate around the outside of the waste segment. During the rotation process, the front grinding piece 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 piece 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. For the cutting surface after the cutting knife 15 completes the cutting, the grinding disc 25 of the rear grinding piece 20 is squeezed into the cutting surface (such as 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), and the cutting surface is ground against the cutting surface to eliminate burrs generated by cutting the cutting surface, thereby ensuring that the surface of the cutting surface of the workpiece is smooth and flat, and the waste section is always between the cutting knife 15 and the front grinding piece 26 and the rear grinding piece 20 during the cutting process, thereby 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.

[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] A lower gear 16, which is fixedly mounted on the cutting blade 15, and can mesh with a 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 installed 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 effect.

[0058] During operation, after the cutting is completed, the molding die 4 is separated again (the lower cylinder 301 contracts to drive the threaded rod 302 to move away from each other, thereby driving the molding die 4 to separate from each other). During the separation, 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 to move synchronously with the molding die 4 (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 between 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 inside of the collecting bin 5 along the inclined surface, thereby automatically and accurately collecting the waste segment, avoiding the trouble of manual waste 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 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. 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 groove 28 is provided on the mounting frame 1, and the telescopic connecting frame 32 can slide in the limiting groove 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 is retracted to drive the upper tooth plate 13 to move horizontally, and the upper tooth 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 solution of the present invention, the front grinding piece 26 and the rear grinding piece 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. The outer surface of the grinding roller 24 can be attached to the inner wall of the material dividing section and the workpiece section.

[0063] A rotating shaft 23, 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 on the upper end of the rotating shaft 23 through a movable plate. A motor is arranged on the movable plate, and the motor can drive the rotating shaft 23 to rotate. A connecting plate 19 is fixedly installed on the end of the limit spring 22 away from the rotating shaft 23. A sliding rod 21 is slidably installed on the connecting plate 19 corresponding to the position of 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. A connecting column 18 is fixedly installed 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.

[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 solution of the present invention, the molding die 4 includes a molding cavity 401 and a cutting cavity 402, the molding cavity 401 and the cutting cavity 402 are arranged in parallel and the upper end height of the cutting cavity 402 is lower than the molding cavity 401, and the two sides of the molding die 4 are provided with a transport device 3, and the transport device 3 includes:

[0067] Threaded rods 302, which are arranged on both sides of the molding die 4 and the molds of the molding die 4 are respectively threadedly connected to the threaded rods 302 on both sides, and the threaded rods 302 on both sides can 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;

[0068] The lower cylinder 301 is provided with multiple groups and 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 the lower cylinders 301 arranged on both sides of the threaded rods 302 move relative to each other.

[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 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 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 disposed 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, which 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: The 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 blow molding mechanism 2 for blow molding under the action of the transport device 3;

[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 mold 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 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 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;

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

[0081] Step seven: After cutting, the mold is separated again. After the mold is separated, the molding 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 device (2) are arranged in the mounting frame (1), characterized in that: The cutting device (7) comprises: A rotating frame (12), the rotating frame (12) being rotatably arranged on one side of the mounting frame (1), the rotating frame (12) being able to move horizontally as the molding mold (4) is opened and closed, the rotating frame (12) moving toward the middle position of the molding mold (4) when the molding mold (4) is closed, and the rotating frame (12) moving away from the workpiece when the molding 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 at 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 on 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 molding die (4); a lower gear (16), the lower gear (16) being fixedly mounted on the cutting knife (15), and the lower gear (16) being able to mesh with the lower tooth plate (17) when the lower gear (16) moves horizontally with the rotating frame (12); A collecting bin (5) is arranged 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 the mounting shaft (27) 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); and when the molding die (4) is split, the lower end of the rotating baffle (30) can be tilted toward the collecting bin (5) under the extrusion effect.

3. The in-mold injection molding patch blow molding mold according to claim 2, characterized in that: A rotating seat (11) is rotatably mounted on the upper end of the rotating frame (12), and a mounting frame (9) is rotatably mounted on the rotating seat (11). An upper cylinder (10) is fixedly mounted on the mounting frame (9), and an upper toothed plate (13) is fixedly mounted on the output end of the upper cylinder (10). 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 toothed 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). One 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 groove (28) is provided on the mounting frame (1), and the telescopic connecting frame (32) can slide in the limiting groove (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 wall of the material dividing section and the workpiece section; A rotating shaft (23), wherein the rotating shaft (23) is fixedly mounted on the upper surface of the grinding roller (24); The elastic connection assembly comprises a limit spring (22), wherein the limit spring (22) is arranged on the upper end of the rotating shaft (23) via a movable plate, and a motor is arranged on each movable plate, 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 molding die (4) comprises a molding cavity (401) and a cutting cavity (402), wherein the molding cavity (401) and the cutting cavity (402) are arranged in parallel and the upper end of the cutting cavity (402) is lower than the molding cavity (401). Transport equipment (3) is arranged on both sides of the molding die (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) are respectively threadedly connected to the threaded rods (302) on both sides, and the threaded rods (302) on both sides can 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 cylinder (301) is provided with multiple groups and is fixedly installed in the installation frame (1) at positions corresponding to the ends of the threaded rod (302). The threaded rod (302) is rotatably connected to the output end of the lower cylinder (301) and moves relatively between the lower cylinders (301) arranged on both sides of the threaded rod (302).

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 installation 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 installation frame (1) away from the extrusion mechanism (29), and a support platform (31) is arranged on the installation 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).

7. The in-mold injection molding patch blow molding mold according to claim 6, characterized in that: A driving motor is disposed 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 molding patch blow molding method, applicable to an in-mold injection molding 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 an extrusion mechanism (29) and enter into a molding cavity (401) of a molding die (4); Step 2: The molding mold (4) moves the molding cavity (401) to the bottom of the blow molding mechanism (2) under the action of the transport device (3) 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), and the post-mold cutting device (7) moves to the mold center position accordingly; Step 5: The transport device (3) drives the molding cavity (401) to move below the blow molding mechanism (2) again, and the finished product is now in the cutting cavity (402) and moves below 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 separated again. After the mold is separated, the molding 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 movable baffle (30).

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