A linkage core pulling mechanism and method for injection mold

Abstract

The present invention discloses a linkage core-pulling mechanism of an injection mold and a method thereof, and relates to the technical field of injection molding production. The present invention comprises a machine body, a template is arranged inside the machine body, and a core-pulling device is arranged inside the machine body; the core-pulling device comprises a telescopic rod 1, a connecting block, an inner insert tube, concentric rings and a small cylinder, the telescopic rod 1 is fixed to the inner wall of the back of the machine body, and the connecting block is fixed to the telescopic end of the telescopic rod 1. The present invention makes the telescopic rod 1, the connecting block, the inner insert tube, the concentric rings and the small cylinder cooperate through the setting of the core-pulling device, and the connecting block pulls the inner insert tube outwardly. During the process of pulling out the inner insert tube, the arc-shaped slide groove on the outer wall of the inner insert tube passes through the small cylinder on the inner wall of the concentric ring. After being squeezed by the small cylinder, the inner insert tube rotates during the withdrawal process, thereby helping the inner insert tube to be more easily separated from the injection molded product, avoiding damage to the injection molded product when the inner insert tube core is pulled out, and improving the yield rate.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding production, in particular to a linkage core pulling mechanism of an injection mold and a method thereof. Background Art

[0002] In injection molding operations, some molds may have holes or reserved holes for later loading screws due to design and functional requirements. The core pulling operation is to preferentially remove the molds that create holes before mold separation to avoid collision between molds.

[0003] The patent with the patent announcement number CN210820718U discloses a core-pulling linkage mechanism for an injection mold, which belongs to the field of mold technology. It solves the problem that the existing injection mold's oblique core-pulling mechanism has a relatively complex structure, is not convenient for mold opening, and is not easy to eject during production. The core-pulling linkage mechanism of the injection mold includes a fixed mold and a movable mold that cooperates with the fixed mold to form a product cavity. The movable mold is provided with a guide hole, and a core ejector pin with one end extending into the product cavity is slidably penetrated in the guide hole. A core-pulling device that allows the core ejector pin to move outward along its axial direction is provided between the core ejector pin and the movable mold. The patent has a simple structure, simplifies the internal structure of the mold, is convenient for mold opening, and has a long service life.

[0004] The current core pulling device has the following problems: the core pulling operation is mostly carried out directly, and it is not easy to demold the mold with reserved embedded holes and the injection molded product. Direct pulling can easily cause damage to the injection molded product and the yield rate is low. Therefore, it is necessary to design a device that can rotate during the pulling process and improve the success rate of core pulling. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a linkage core pulling mechanism and method for an injection mold, which solves the problems raised in the above background technology that the core pulling operation is mostly carried out directly, the mold with reserved embedded holes and the injection molded product are difficult to demold, the direct pulling can easily cause damage to the injection molded product, and the yield rate is low.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a linkage core-pulling mechanism of an injection mold and a method thereof, comprising a machine body, a template is arranged inside the machine body, a core-pulling device, a discharge device, a safety device and a deburring device are arranged inside the machine body; the core-pulling device comprises a telescopic rod, a connecting block, an inner insert, concentric rings and a small cylinder, the telescopic rod is fixed to the inner wall of the back of the machine body, the connecting block is fixed to the telescopic end of the telescopic rod, the inner insert is rotatably mounted on the front of the connecting block, the concentric rings are fixed to the outer wall of the template, the small cylinder is The end is fixed on the inner wall of the concentric ring, and the outer wall of the inner tube is provided with an arc-shaped groove, and the other end of the small cylinder is slidably installed in the arc-shaped groove. When the injection molding is completed and the core needs to be pulled, the telescopic rod is started, and the telescopic rod pulls the connecting block, and the connecting block pulls the inner tube outward. During the process of pulling out the inner tube, the arc-shaped groove on the outer wall of the inner tube passes through the small cylinder on the inner wall of the concentric ring. After being squeezed by the small cylinder, the inner tube will rotate during the withdrawal process, thereby helping the inner tube to be more easily separated from the injection molded product, avoiding damage to the injection molded product when the inner tube is pulled out, and improving the yield rate.

[0007] According to the above technical scheme, the core pulling device also includes a micro-refrigerator, a heat-conducting copper tube and a thermometer. The micro-refrigerator is fixed on the top of the connecting block. A connecting circular groove is provided between the top surface of the connecting block and the inside of the inner tube. One end of the heat-conducting copper tube is fixed on the bottom of the micro-refrigerator, and the other end of the heat-conducting copper tube is fixed on the inside of the inner tube. The thermometer is fixed on the top of the micro-refrigerator. There may be adhesion between the injection molded product and the inner tube due to high temperature. Relying on the conduction of the general cooling system may cause residual heat to remain on the surface of the inner tube. Therefore, the internal temperature of the inner tube is observed by using a thermometer, and then the micro-refrigerator is started as needed. The micro-refrigerator cools the heat-conducting copper tube, and the heat-conducting copper tube is used to cool the inner tube, so as to solve the problem of removing the residual heat inside the inner tube. At the same time, thermal expansion and contraction can also make the injection molded product and the inner tube better separated, further improving the separation effect.

[0008] According to the above technical solution, the unloading device includes two telescopic rods, a top column and a push plate. The two telescopic rods are fixed on both sides of the inner wall of the machine body, one end of the top column is fixed on both sides of the inner wall of the machine body, the top column passes through the side of the template, and the push plate is fixed at the other end of the top column. When the template is demolded, the two telescopic rods are started, and the two telescopic rods drive the template to move to both sides. At this time, the top column and the push plate are fixed, and the finished product is pushed out of the template by using the top column and the push plate, thereby achieving the purpose of automatic unloading and improving work efficiency.

[0009] According to the above technical scheme, the unloading device also includes a sealing plate, a spring plate and a triangular block. The sealing plate is fixed on the top surface of the inner wall of the template, the spring plate is fixed to the bottom surface of the sealing plate by a spring, the spring plate is slidably installed on the inner wall of the template, the triangular block is fixed on the bottom surface of the spring plate, and the inner wall of the template is provided with a triangular groove for accommodating the triangular block. The spring plate is located on the movement trajectory of the triangular groove of the inner wall of the template. Adhesion may also occur between the injection molded product and the push plate, thus preventing them from falling. After the injection molded product leaves the template, the spring plate pops up downward under the action of the spring force, and the spring plate can push the injection molded product to fall, avoiding the adhesion of the finished product. When the next operation is performed, the telescopic rod 2 pushes the template to close the mold, and the triangular groove of the template squeezes the spring plate, so that the spring plate moves toward the sealing plate and sticks to the sealing plate. The triangular block is embedded in the triangular groove, so that the unloading device automatically recovers, thereby ensuring the smoothness of the interior of the template.

[0010] The lock plate is engaged with the locking plate and is moved in a direction of rotation relative to the locking plate to release the locking plate, thereby preventing the locking plate from being engaged and causing the locking plate to be disengaged from the locking plate.

[0011] According to the above technical solution, the safety device also includes a square frame, a square rod and a buffer block, the square frame is fixed to one side of the left gusset plate close to the mold line, the square rod is fixed to one side of the right gusset plate close to the mold line, the buffer block is fixed to one end of the square rod close to the square frame, the buffer block is slidably installed on the inner wall of the square frame, and springs are arranged between the buffer block and the left and right sides of the inner wall of the square frame. During the process of mold closing and mold parting, the springs between the square frame and the buffer block are used for buffering protection to avoid strong collision between the square frame and the square rod. The connection through the gusset plate also ensures that there will be no strong collision and impact between the two templates, thereby reducing the impact and stress between the templates and improving the service life of the templates.

[0012] According to the above technical scheme, the deburring device includes a stretching rod, a limit frame and a scraper, one end of the stretching rod is fixed on both sides of the inner wall of the machine body, the limit frame is fixed on the other end of the stretching rod, and the scraper is fixed on the bottom of the limit frame. When the injection molded product is detached, there will be many burrs and mold edges on the surface, so it is necessary to perform deburring operation on it. The stretching rod and the limit frame can be used to limit the injection molded product after it falls, ensuring that the injection molded product will not deviate from the deburring device, and the scraper is used to scrape off the mold edges and burrs of the finished product, so as to achieve the purpose of preliminary cleaning of the injection molded product, provide convenience for subsequent operations, and improve work efficiency.

[0013] According to the above technical solution, the deburring device also includes a motor, a rotating shaft and a roller. The motor is fixed on the inner wall of the limit frame, the rotating shaft is fixed on the output end of the motor, and the roller is fixed on the outer wall of the rotating shaft. The injection molded product cannot fall normally and pass through the deburring device by gravity alone. The motor drives the rotating shaft to rotate, and the rotating shaft drives the roller to rotate. The roller is used to roll the injection molded product downward, so that the injection molded product can pass through the deburring device completely.

[0014] A method for using a linkage core pulling mechanism of an injection mold comprises the following steps

[0015] S1. When the injection molding is finished and the core needs to be pulled, start the telescopic rod 1;

[0016] S2, the telescopic rod pulls the connecting block, and the connecting block pulls the inner insert tube outward;

[0017] S3. During the process of extracting the inner tube, the arc-shaped slide groove on the outer wall of the inner tube passes through the small cylinder on the inner wall of the concentric ring;

[0018] S4, after being squeezed by the small cylinder, the inner tube will rotate during the withdrawal process;

[0019] S5. It helps the inner tube to be separated from the finished injection molded product more easily, avoiding damage to the finished injection molded product when the inner tube is pulled out, and improving the yield rate.

[0020] The present invention provides a linkage core pulling mechanism and method for an injection mold, which has the following beneficial effects:

[0021] (1) The present invention uses the setting of the core pulling device to make the telescopic rod, the connecting block, the inner tube, the concentric rings and the small cylinder cooperate. The connecting block pulls the inner tube out. During the process of pulling out the inner tube, the arc-shaped slide groove on the outer wall of the inner tube passes through the small cylinder on the inner wall of the concentric ring. After being squeezed by the small cylinder, the inner tube rotates during the withdrawal process, thereby helping the inner tube to be more easily separated from the injection molded product, avoiding damage to the injection molded product when the inner tube is pulled out, and improving the yield rate; the micro-refrigerator, the heat-conducting copper tube and the thermometer cooperate. There may be adhesion between the injection molded product and the inner tube due to high temperature. Relying on the conduction of the general cooling system may cause residual heat to remain on the surface of the inner tube. Therefore, the internal temperature of the inner tube is observed by the thermometer, and then the micro-refrigerator is started as needed. The micro-refrigerator cools the heat-conducting copper tube. The heat-conducting copper tube is used to cool the inner tube, so as to eliminate the problem of residual heat inside the inner tube. At the same time, thermal expansion and contraction can also make the injection molded product and the inner tube better separated, further improving the separation effect.

[0022] (2) The present invention sets a discharging device so that the telescopic rod 2, the top column and the push plate cooperate with each other. The telescopic rod 2 drives the template to move to both sides. At this time, the top column and the push plate are fixed. The finished product is pushed out of the template by the top column and the push plate, thereby achieving the purpose of automatic discharging and improving the working efficiency. The sealing plate, the spring plate and the triangular block cooperate with each other. Under the action of the spring force, the spring plate pops up downward. The spring plate can push the injection molded product to fall and avoid the adhesion of the finished product. When the next operation is performed, the telescopic rod 2 pushes the template to close the mold. The triangular groove of the template squeezes the spring plate, so that the spring plate moves toward the sealing plate and sticks to the sealing plate. The triangular block is embedded in the triangular groove, so that the discharging device automatically recovers and the smoothness of the inside of the template is guaranteed.

[0023] (3) The present invention sets a safety device so that the gusset plate, the lock plate and the push rod cooperate. The gusset plate squeezes the lock plate, the lock plate moves backward, the spring between the lock plate and the machine body contracts, and the gusset plate continues to move to both sides. Under the action of the spring force, the lock plate pops up and blocks the mold closing path of the gusset plate. This ensures that the template will not be accidentally closed during cleaning and maintenance. When the cleaning is completed, the personnel needs to press the push rod with both hands, and the push rod pushes the lock plate. The lock plate leaves the mold closing path of the gusset plate. At this time, the mold can be closed normally, which can ensure the safety of mold closing. The square frame, the square rod and the buffer block cooperate, and the spring between the square frame and the buffer block is used for buffering protection to avoid strong collision between the square frame and the square rod. The connection through the gusset plate also ensures that there will be no strong collision and impact between the two templates, thereby reducing the impact and stress between the templates and increasing the service life of the templates.

[0024] (4) The present invention sets a deburring device so that the stretching rod, the limit frame and the scraper cooperate. The stretching rod and the limit frame can be used to limit the injection molded product after it falls, ensuring that the injection molded product will not deviate from the deburring device. The scraper is used to scrape off the mold edge line and burrs of the finished product, thereby achieving the purpose of preliminary cleaning of the injection molded product, providing convenience for subsequent operations and improving work efficiency; the motor, the rotating shaft and the roller cooperate. The injection molded product cannot fall normally and pass through the deburring device by gravity alone. The motor drives the rotating shaft to rotate, and the rotating shaft drives the roller to rotate. The roller is used to roll the injection molded product downward, so that the injection molded product can pass through the deburring device completely. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the present invention as a whole;

[0026] Figure 2 It is a schematic diagram of the interior of the present invention as a whole;

[0027] Figure 3 It is a schematic diagram of the core pulling device of the present invention;

[0028] Figure 4 It is an enlarged schematic diagram of point a of the core pulling device of the present invention;

[0029] Figure 5 It is a cross-sectional schematic diagram of the core pulling device of the present invention;

[0030] Figure 6 It is a schematic diagram of the unloading device of the present invention;

[0031] Figure 7 is a schematic diagram of the safety device of the present invention;

[0032] Figure 8 It is an enlarged schematic diagram of point b of the safety device of the present invention;

[0033] Fig. 9 Schematic diagram of the deburring device of the present invention.

[0034] In the figure: 11, machine body; 12, template; 2, core pulling device; 3, unloading device; 4, safety device; 5, deburring device; 21, telescopic rod 1; 22, connecting block; 23, inner tube; 24, concentric rings; 25, small cylinder; 26, micro refrigerator; 27, heat-conducting copper tube; 28, thermometer; 31, telescopic rod 2; 32, top column; 33, push plate; 34, sealing plate; 35, spring plate; 36, triangular block; 41, buckle plate; 42, locking plate; 43, push rod; 44, square frame; 45, square rod; 46, buffer block; 51, stretching rod; 52, limit frame; 53, scraper; 54, motor; 55, rotating shaft; 56, roller. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] See also Figure 1-6 One embodiment of the present invention is: a linkage core-pulling mechanism of an injection mold and a method thereof, comprising a body 11, a template 12 is arranged inside the body 11, a core-pulling device 2, a discharge device 3, a safety device 4 and a deburring device 5 are arranged inside the body 11; the core-pulling device 2 comprises a telescopic rod 21, a connecting block 22, an inner insert 23, a concentric ring 24 and a small cylinder 25, the telescopic rod 21 is fixed to the inner wall of the back of the body 11, when the injection molding is completed and the core is pulled, the telescopic rod 21 is started, the connecting block 22 is fixed to the telescopic end of the telescopic rod 21, the telescopic rod 21 pulls the connecting block 22, and the inner insert 23 is rotatably installed in the connecting block 23. On the front side of block 22, connecting block 22 pulls inner tube 23 outward, concentric ring 24 is fixed on the outer wall of template 12, one end of small cylinder 25 is fixed on the inner wall of concentric ring 24, an arc-shaped groove is provided on the outer wall of inner tube 23, the other end of small cylinder 25 is slidably installed in the arc-shaped groove, during the process of inner tube 23 being pulled out, the arc-shaped groove on the outer wall of inner tube 23 passes through small cylinder 25 on the inner wall of concentric ring 24, and the inner tube 23 is squeezed by small cylinder 25, so that inner tube 23 will rotate during the withdrawal process, thereby helping inner tube 23 to be more easily separated from the finished injection molded product, avoiding damage to the finished injection molded product when inner tube 23 is pulled out, and improving the yield rate.

[0037] The core pulling device 2 also includes a micro-refrigerator 26, a heat-conducting copper tube 27 and a thermometer 28. The micro-refrigerator 26 is fixed on the top of the connecting block 22. A connecting circular groove is provided between the top surface of the connecting block 22 and the inside of the inner tube 23. One end of the heat-conducting copper tube 27 is fixed on the bottom of the micro-refrigerator 26, and the other end of the heat-conducting copper tube 27 is fixed on the inside of the inner tube 23. The thermometer 28 is fixed on the top of the micro-refrigerator 26. There may be adhesion between the injection molded product and the inner tube 23 due to high temperature. Relying on the conduction of the general cooling system may cause residual heat to remain on the surface of the inner tube 23. Therefore, the internal temperature of the inner tube 23 is observed by the thermometer 28, and then the micro-refrigerator 26 is started as needed. The micro-refrigerator 26 cools the heat-conducting copper tube 27, and the heat-conducting copper tube 27 is used to cool the inner tube 23, so as to eliminate the problem of residual heat inside the inner tube 23. At the same time, thermal expansion and contraction can also make the injection molded product and the inner tube 23 better separated, further improving the separation effect.

[0038] The unloading device 3 includes a telescopic rod 31, a top column 32 and a push plate 33. The telescopic rod 31 is fixed on both sides of the inner wall of the body 11. When the template 12 is demolded, the telescopic rod 31 is started, and the telescopic rod 31 drives the template 12 to move to both sides. One end of the top column 32 is fixed on both sides of the inner wall of the body 11, and the top column 32 passes through the side of the template 12. The push plate 33 is fixed to the other end of the top column 32. At this time, the top column 32 and the push plate 33 are fixed. The finished product is pushed out of the template 12 by using the top column 32 and the push plate 33, thereby achieving the purpose of automatic unloading and improving the working efficiency.

[0039] The unloading device 3 also includes a sealing plate 34, a spring plate 35 and a triangular block 36. The sealing plate 34 is fixed to the top surface of the inner wall of the template 12, and the spring plate 35 is fixed to the bottom surface of the sealing plate 34 by a spring. The injection molded product and the push plate 33 may also adhere to each other, so that they cannot fall off. When the injection molded product leaves the template 12, the spring plate 35 pops up downward under the action of the spring force, and the spring plate 35 can push the injection molded product to fall, thereby avoiding the adhesion of the finished product. The spring plate 35 is slidably mounted on the inner wall of the template 12, and the triangular block 36 is fixed to the bottom surface of the spring plate 35. The inner wall of the template 12 is provided with a triangular groove for accommodating the triangular block 36. The spring plate 35 is located on the movement trajectory of the triangular groove on the inner wall of the template 12. When the next operation is performed, the telescopic rod 2 31 pushes the template 12 to close the mold, and the triangular groove of the template 12 squeezes the spring plate 35, so that the spring plate 35 moves toward the sealing plate 34 and sticks to the sealing plate 34. The triangular block 36 is embedded in the triangular groove, so that the unloading device 3 automatically recovers, thereby ensuring the internal smoothness of the template 12.

[0040] When in use, when the injection molding is completed and the core needs to be pulled out, the telescopic rod 21 is started, and the telescopic rod 21 pulls the connecting block 22, and the connecting block 22 pulls the inner tube 23 outward. During the process of pulling out the inner tube 23, the arc-shaped slide groove on the outer wall of the inner tube 23 passes through the small cylinder 25 on the inner wall of the concentric ring 24. After being squeezed by the small cylinder 25, the inner tube 23 will rotate during the withdrawal process, thereby helping the inner tube 23 to be more easily separated from the injection molded product, avoiding damage to the injection molded product when the inner tube 23 is pulled out, and improving the yield rate; at the same time, the injection There may be adhesion between the injection molded product and the inner tube 23 due to high temperature. Relying on the general cooling system for conduction may cause residual heat to remain on the surface of the inner tube 23. Therefore, the internal temperature of the inner tube 23 is observed by using a thermometer 28, and then the micro-refrigerator 26 is started as needed. The micro-refrigerator 26 cools the heat-conducting copper tube 27, and the heat-conducting copper tube 27 is used to cool the inner tube 23 to eliminate the problem of residual heat inside the inner tube 23. At the same time, thermal expansion and contraction can also make the injection molded product and the inner tube 23 better separated, further improving the separation effect.

[0041] When the template 12 is demolded, the telescopic rod 2 31 is started, and the telescopic rod 2 31 drives the template 12 to move to both sides. At this time, the top column 32 and the push plate 33 are fixed, and the top column 32 and the push plate 33 are used to push the finished product out of the template 12, thereby achieving the purpose of automatic unloading and improving the operation efficiency; at the same time, adhesion may also occur between the injection molded product and the push plate 33, so that it cannot fall. When the injection molded product leaves the template 12, the spring plate 35 pops up downward under the action of the spring force, and the spring plate 35 can push the injection molded product to fall, avoiding the adhesion of the finished product. When the next operation is performed, the telescopic rod 2 31 pushes the template 12 to close the mold, and the triangular groove of the template 12 squeezes the spring plate 35, so that the spring plate 35 moves toward the sealing plate 34 and sticks to the sealing plate 34, and the triangular block 36 is embedded in the triangular groove, so that the unloading device 3 automatically recovers, ensuring the smoothness of the interior of the template 12.

[0042] See also Figure 1-9 On the basis of the above embodiment, another embodiment of the present invention further includes a safety device 4 and a deburring device 5.

[0043] The safety device 4 includes a gusset plate 41, a lock plate 42 and a push rod 43. The gusset plate 41 is fixed to the front of the template 12, and the lock plate 42 is slidably mounted on the inner wall of the machine body 11. A spring is arranged between the lock plate 42 and the inner wall of the machine body 11. The lock plate 42 is located on the movement track of the gusset plate 41. In repeated production, the template 12 needs to be cleaned and maintained before closing the mold. Therefore, in order to avoid work-related injuries caused by misoperation of personnel, the safety device 4 is used to protect the operator. When the telescopic rod 31 drives the template 12 to move to both sides, the template 12 drives the gusset plate 41 to move to both sides, and the gusset plate 41 is locked. Plate 41 squeezes locking plate 42, locking plate 42 moves backward, the spring between locking plate 42 and body 11 contracts, and pinch plate 41 continues to move to both sides. Under the action of spring force, locking plate 42 pops out and blocks the mold closing route of pinch plate 41, thus ensuring that template 12 will not be accidentally mold closed during cleaning and maintenance. Push rod 43 is fixed on the front side of locking plate 42. When cleaning is completed, personnel need to press push rod 43 with both hands, and push rod 43 pushes locking plate 42, and locking plate 42 leaves the mold closing route of pinch plate 41. At this time, the mold can be closed normally, and the safety of mold closing can be ensured.

[0044] The safety device 4 also includes a square frame 44, a square rod 45 and a buffer block 46. The square frame 44 is fixed to one side of the left gusset plate 41 close to the mold line, the square rod 45 is fixed to one side of the right gusset plate 41 close to the mold line, the buffer block 46 is fixed to one end of the square rod 45 close to the square frame 44, and the buffer block 46 is slidably installed on the inner wall of the square frame 44. Springs are arranged between the buffer block 46 and the left and right sides of the inner wall of the square frame 44. During the mold closing and parting process, the springs between the square frame 44 and the buffer block 46 are used for buffering protection to avoid a strong collision between the square frame 44 and the square rod 45. The connection through the gusset plate 41 ensures that there will be no strong collision and impact between the two templates 12, thereby reducing the impact and stress between the templates 12 and improving the service life of the templates 12.

[0045] The deburring device 5 includes a stretching rod 51, a limit frame 52 and a scraper 53. One end of the stretching rod 51 is fixed to both sides of the inner wall of the body 11, and the limit frame 52 is fixed to the other end of the stretching rod 51. When the injection molded product is detached, there will be many burrs and mold edges on the surface, so it is necessary to perform deburring operation on it. The stretching rod 51 and the limit frame 52 can be used to limit the injection molded product after it falls. The scraper 53 is fixed to the bottom of the limit frame 52 to ensure that the injection molded product will not deviate from the deburring device 5. The scraper 53 is used to scrape off the mold edges and burrs of the finished product, so as to achieve the purpose of preliminary cleaning of the injection molded product, provide convenience for subsequent operations, and improve work efficiency.

[0046] The deburring device 5 also includes a motor 54, a rotating shaft 55 and a roller 56. The motor 54 is fixed to the inner wall of the limit frame 52. The injection molded product cannot fall normally and pass through the deburring device 5 by gravity alone. The rotating shaft 55 is fixed to the output end of the motor 54. The motor 54 drives the rotating shaft 55 to rotate. The roller 56 is fixed to the outer wall of the rotating shaft 55. The rotating shaft 55 drives the roller 56 to rotate. The injection molded product is rolled downward by the roller 56, so that the injection molded product can pass through the deburring device 5 completely.

[0047] When in use, in repeated production, the template 12 needs to be cleaned and maintained before closing the mold. Therefore, in order to avoid work injuries caused by misoperation, the safety device 4 is used to protect the operator. When the telescopic rod 31 drives the template 12 to move to both sides, the template 12 drives the gusset plate 41 to move to both sides, the gusset plate 41 squeezes the locking plate 42, and the locking plate 42 moves backward. The spring between the locking plate 42 and the body 11 contracts, and the gusset plate 41 continues to move to both sides. Under the action of the spring force, the locking plate 42 pops up and blocks the gusset plate 41 on the closing path of the mold. This ensures that the template 12 will not be damaged during cleaning and maintenance. In order to prevent accidental mold closing, after cleaning is completed, the personnel need to press the push rod 43 with both hands, and the push rod 43 pushes the locking plate 42, and the locking plate 42 leaves the mold closing route of the pinch plate 41. At this time, the mold can be closed normally, and the safety of the mold closing can be ensured; at the same time, in the process of mold closing and mold separation, the spring between the square frame 44 and the buffer block 46 is used for buffering protection to avoid strong collision between the square frame 44 and the square rod 45. The connection through the pinch plate 41 also ensures that there will be no strong collision and impact between the two templates 12, thereby reducing the impact and stress between the templates 12 and increasing the service life of the templates 12.

[0048] When the injection molded product is detached, there will be many burrs and mold edges on the surface, so it needs to be deburred. The stretching rod 51 and the limit frame 52 can be used to limit the injection molded product after it falls, ensuring that the injection molded product will not deviate from the deburring device 5. The scraper 53 is used to scrape off the mold edges and burrs of the finished product, so as to achieve the purpose of preliminary cleaning of the injection molded product, provide convenience for subsequent operations, and improve work efficiency. At the same time, the injection molded product cannot fall normally and pass through the deburring device 5 by gravity alone. The motor 54 drives the rotating shaft 55 to rotate, and the rotating shaft 55 drives the roller 56 to rotate. The roller 56 is used to roll the injection molded product downward, so that the injection molded product can pass through the deburring device 5 completely.

[0049] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A linkage core-pulling mechanism for an injection mold, comprising a body (11), wherein a template (12) is arranged inside the body (11), characterized in that: The machine body (11) is provided with a core pulling device (2), a discharge device (3), a safety device (4) and a burr removal device (5); the core pulling device (2) comprises a telescopic rod (21), a connecting block (22), an inner insert tube (23), a concentric ring (24) and a small cylinder (25); the telescopic rod (21) is fixed to the inner wall of the back of the machine body (11); the connecting block (22) is fixed to the telescopic end of the telescopic rod (21); the inner insert tube (23) is rotatably mounted on the front of the connecting block (22); the concentric ring (24) is fixed to the outer wall of the template (12); one end of the small cylinder (25) is fixed to the inner wall of the concentric ring (24); the outer wall of the inner insert tube (23) is provided with an arc-shaped slide groove; the other end of the small cylinder (25) is slidably mounted in the arc-shaped slide groove; The core-pulling device (2) further comprises a micro-refrigerator (26), a heat-conducting copper tube (27) and a thermometer (28); the micro-refrigerator (26) is fixed on the top of the connecting block (22); a communicating circular groove is provided between the top surface of the connecting block (22) and the inside of the inner tube (23); one end of the heat-conducting copper tube (27) is fixed on the bottom of the micro-refrigerator (26); the other end of the heat-conducting copper tube (27) is fixed on the inside of the inner tube (23); and the thermometer (28) is fixed on the top of the micro-refrigerator (26); The unloading device (3) comprises a second telescopic rod (31), a top column (32) and a push plate (33), wherein the second telescopic rod (31) is fixed to both sides of the inner wall of the machine body (11), one end of the top column (32) is fixed to both sides of the inner wall of the machine body (11), the top column (32) passes through the side of the template (12), and the push plate (33) is fixed to the other end of the top column (32); The unloading device (3) further comprises a sealing plate (34), a spring plate (35) and a triangular block (36); the sealing plate (34) is fixed to the top surface of the inner wall of the template (12); the spring plate (35) is fixed to the bottom surface of the sealing plate (34) by a spring; the spring plate (35) is slidably mounted on the inner wall of the template (12); the triangular block (36) is fixed to the bottom surface of the spring plate (35); a triangular groove for accommodating the triangular block (36) is provided on the inner wall of the template (12); and the spring plate (35) is located on the movement track of the triangular groove on the inner wall of the template (12); The safety device (4) comprises a pinch plate (41), a lock plate (42) and a push rod (43); the pinch plate (41) is fixed on the front side of the template (12); the lock plate (42) is slidably mounted on the inner wall of the machine body (11); a spring is arranged between the lock plate (42) and the inner wall of the machine body (11); the lock plate (42) is located on the movement track of the pinch plate (41); and the push rod (43) is fixed on the front side of the lock plate (42); The safety device (4) further comprises a square frame (44), a square rod (45) and a buffer block (46); the square frame (44) is fixed to a side of the left gusset plate (41) close to the mold line; the square rod (45) is fixed to a side of the right gusset plate (41) close to the mold line; the buffer block (46) is fixed to an end of the square rod (45) close to the square frame (44); the buffer block (46) is slidably mounted on the inner wall of the square frame (44); and springs are arranged between the buffer block (46) and the inner wall of the square frame (44) on both left and right sides.

2. The linkage core-pulling mechanism of an injection mold according to claim 1, characterized in that: The deburring device (5) comprises a stretching rod (51), a limiting frame (52) and a scraper (53); one end of the stretching rod (51) is fixed to both sides of the inner wall of the machine body (11); the limiting frame (52) is fixed to the other end of the stretching rod (51); and the scraper (53) is fixed to the bottom of the limiting frame (52).

3. The linkage core-pulling mechanism of an injection mold according to claim 2, characterized in that: The deburring device (5) further comprises a motor (54), a rotating shaft (55) and a roller (56), wherein the motor (54) is fixed to the inner wall of the limiting frame (52), the rotating shaft (55) is fixed to the output end of the motor (54), and the roller (56) is fixed to the outer wall of the rotating shaft (55).

4. A method for using a linkage core-pulling mechanism of an injection mold according to any one of claims 1 to 3, characterized in that: The following steps are included S1, when the injection molding is completed and the core needs to be pulled out, start the telescopic rod 1 (21); S2, the telescopic rod 1 (21) pulls the connecting block (22), and the connecting block (22) pulls the inner insert tube (23) outward; S3, during the process of withdrawing the inner tube (23), the arc-shaped slide groove on the outer wall of the inner tube (23) passes through the small cylinder (25) on the inner wall of the concentric ring (24); S4, after being squeezed by the small cylinder (25), the inner tube (23) will rotate during the withdrawal process; S5. It helps the inner insert tube (23) to be more easily separated from the injection molded product, thereby preventing the injection molded product from being damaged when the inner insert tube (23) is pulled out of the core, thereby improving the yield rate.

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