An automatic sprue cutting apparatus

Abstract

The utility model discloses an automatic sprue cutting equipment, including machine table, product clamp, product transplanting subassembly, support punch -shear mechanism, dust collecting mechanism and milling gate mechanism, be equipped with product clamp on machine table, product clamp left side fixedly clamped injection molding work piece, be equipped with the product transplanting subassembly with its parallel right side of product clamp, and product transplanting subassembly can drive product clamp reciprocating movement along longitudinal direction before and after, still be equipped with support punch -shear mechanism and milling gate mechanism on the machine table of product clamp left side, and product transplanting subassembly drives product clamp to slide forward, and product clamp clamps injection molding work piece first through support punch -shear mechanism to complete cutting material, and then remove to align with the front end of milling gate mechanism, and the cutting material position of injection molding work piece is milled and polished to milling gate mechanism, and the periphery of the front end of milling gate mechanism is equipped with dust collecting mechanism, and the debris generated in polishing is sucked and collected by dust collecting mechanism, the equipment can automatically cut off the slender gate of injection molding product, and the debris of cutting material is sucked, and has the advantages of high cutting material precision, high efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of injection molding equipment, specifically relating to an automatic gate cutting device. Background Technology

[0002] In the injection molding industry, handling products with long, narrow gates is a common challenge. These gates are typically fragile yet firmly connected to the product body. Improper force application during removal can result in the gate not breaking cleanly at the root, leaving raised, uneven remnants or burrs on the product surface, affecting appearance and assembly. Currently, manual shearing equipment is commonly used to remove long, narrow gates. However, automated production demands high precision in gate removal. The cutting position must be precisely controlled at the junction of the gate and the product body, with just the right depth. Cutting too deep will damage the product, leaving pits; cutting too shallow will leave remnants. Manual operation cannot guarantee consistency across thousands of products. Furthermore, for tiny products or precision parts, manual removal of long, narrow gates is extremely inefficient, labor-intensive, and prone to fatigue leading to a decrease in yield. Given the low efficiency and precision of manual operation, there is a need to develop a highly efficient and precise cutting device to meet the demands of automated injection molding. Utility Model Content

[0003] To address the aforementioned problems and technical needs, this utility model provides an automatic gate cutting device. This device can automatically cut off the slender gates of injection molded products and simultaneously remove the cutting debris, then transfer the cut injection molded product to the next process. It has the advantages of high cutting accuracy and high efficiency.

[0004] The technical solution of this utility model is as follows: An automatic gate cutting device includes a machine base, a product fixture, a product transfer component, a support punching and shearing mechanism, a dust collection mechanism, and a gate milling mechanism. The machine base is provided with a product fixture, which holds the injection molded workpiece fixedly on its left side. The product transfer component is provided parallel to the product fixture on its right side, and can drive the product fixture to move back and forth longitudinally. The machine base on the left side of the product fixture is also provided with a support punching and shearing mechanism and a gate milling mechanism. Both the support punching and shearing mechanism and the gate milling mechanism are perpendicular to the moving direction of the product fixture. The product transfer component drives the product fixture to slide forward. The injection molded workpiece held by the product fixture first passes through the support punching and shearing mechanism to complete the cutting operation, and then moves to be aligned with the front end of the gate milling mechanism. The gate milling mechanism mills and grinds the cutting position of the injection molded workpiece. A dust collection mechanism is provided on the periphery of the front end of the gate milling mechanism, and the debris generated by grinding is sucked up and collected by the dust collection mechanism.

[0005] Furthermore, the product fixture includes a housing, an ejection mechanism, product grippers, a support assembly, and a positioning sensor. The ejection mechanism penetrates the housing, and a product gripper is located at the front end of the ejection mechanism, penetrating the left side plate of the housing. The injection molded workpiece is circular, and the product gripper clamps or releases the injection molded workpiece from the inside. The long gate of the injection molded workpiece is vertically positioned at its center. The ejection mechanism can drive the product gripper and the injection molded workpiece to extend and retract relative to the left side plate of the housing. Support assemblies and positioning sensors are respectively located on both sides of the product gripper. The support assembly includes a telescopic cylinder and a stop claw. The telescopic cylinder is fixedly installed on the left side plate of the housing, and the front end of the telescopic cylinder is connected to the stop claw. The telescopic cylinder can drive the stop claw to extend forward, so that the stop claw blocks the outer surface of the injection molded workpiece, limiting the position of the injection molded workpiece in the clamped state. The positioning sensor emits a detection ray, which is directed towards the circumference of the injection molded workpiece, and the positioning sensor detects the positioning status of the injection molded workpiece in real time.

[0006] Furthermore, the product transfer assembly includes a guide rail, a transfer electric cylinder, and a transfer cable chain. A set of guide rails is arranged longitudinally on the machine platform, and a slide plate is provided on the guide rail. The bottom of the product clamp is fixedly connected to the slide plate. The transfer electric cylinder is arranged parallel to the right side of the guide rail, and a drive block is provided on the transfer electric cylinder. The right side plate of the product clamp housing is fixedly connected to the drive block. The transfer cable chain is arranged on the right side of the transfer electric cylinder, and the end of the transfer cable chain is fixedly connected to the top of the drive block through a bracket. The transfer electric cylinder drives the product clamp to slide back and forth along the guide rail.

[0007] Furthermore, a pneumatic clamp is provided at the bottom of the guide rail. The pneumatic clamp can fix the product clamp in the loading position. A vertical photoelectric sensor is provided on the machine base outside the pneumatic clamp. The vertical photoelectric sensor emits sensing rays vertically upward. The sensing rays can monitor the positioning of the injection molded workpiece in the vertical direction.

[0008] Furthermore, the supporting punching and shearing mechanism includes a vertical bracket, a vertical cylinder, pneumatic shears, a supporting cylinder, and an elastic supporting end. The vertical bracket is mounted on the machine base and has an inverted L-shaped structure. A vertical cylinder is installed at the front end of the top of the vertical bracket, and a pneumatic shear is fixedly connected to the bottom of the vertical cylinder. The vertical cylinder drives the pneumatic shears to move up and down, and the pneumatic shears can cut off the gate of the injection molded workpiece. The supporting cylinder is horizontally set through the lower part of the vertical bracket, and a support frame is provided at the bottom of the supporting cylinder. An elastic supporting end is connected to the front end of the supporting cylinder. The supporting cylinder drives the elastic supporting end to move horizontally forward, so that the elastic supporting end elastically abuts against the end face of the injection molded workpiece, limiting the position of the injection molded workpiece.

[0009] Furthermore, the elastic support end includes a base plate, an end plate, a front guide rod, a rear guide rod, and a spring. The base plate is fixedly connected to the piston of the support cylinder. The end plate is correspondingly positioned in front of the base plate, and three front guide rods are fixedly connected through the end plate. The base plate has three holes for the front guide rods to pass through. Three rear guide rods are fixedly connected to the front end face of the base plate, and the end plate has three holes for the rear guide rods to pass through. The front and rear guide rods are spaced apart circumferentially. A spring is provided on the outer side of each rear guide rod, and the two ends of the spring are respectively connected to the base plate and the end plate. The front end face of the end plate is pushed backward by the injection molding workpiece, and the spring provides elastic support to the end plate.

[0010] Furthermore, the milling gate mechanism includes a power head, an air nozzle, a milling cutter head, and a front-end sensor. The front end of the power head is connected to the milling cutter head, which is perpendicularly aligned with the direction of movement of the injection molded workpiece. The milling cutter head can mill and grind the gate cutting area. A base is provided on the rear side of the milling cutter head, and dust blowing metal hoses are symmetrically arranged on both sides of the base. The dust blowing metal hoses can be bent and shaped at will. The bottom end of the dust blowing metal hose is connected to a compressed air source, and the top end of the dust blowing metal hose is an air nozzle. The air nozzle is flat and can be adjusted in any direction to blow air onto the milling cutter head. The front-end sensor is located next to the milling cutter head and can identify the model of the milling cutter head.

[0011] Furthermore, the dust collection mechanism includes an extension cylinder and a dust collection chamber. The extension cylinder is fixedly installed on the machine base below the milling cutter head. The front end of the extension cylinder is connected to the dust collection chamber, which includes an annular baffle and a dust collection square tube. The annular baffle is located in front of the milling cutter head, and the injection-molded workpiece is extended into the annular baffle for milling operations. The bottom of the annular baffle is connected to the dust collection square tube, which sucks up the machining debris inside the annular baffle. The machining debris falls downward through the dust collection square tube. The extension cylinder is connected to the rear side of the dust collection square tube, and the extension cylinder drives the entire dust collection chamber to extend and retract along the milling machining axis.

[0012] Furthermore, a waste hopper is provided below the machine table, with the top of the waste hopper having a discharge opening on the machine table. The discharge opening is directly opposite the front end of the supporting punching and shearing mechanism and the milling gate mechanism. The bottom end of the dust suction square tube is opposite to the discharge opening. A waste collection box is provided at the bottom of the machine table, opposite to the waste hopper. The cut gates and grinding debris are collected in the waste collection box after falling through the waste hopper.

[0013] Furthermore, a buffer platform is provided at one corner of the machine, with multiple material storage stations on the buffer platform. Each material storage station can buffer one injection molded workpiece, and the buffer platform is also equipped with sensors to monitor the arrival status of the injection molded workpiece.

[0014] The beneficial effects of this utility model are: 1) This equipment adopts a fully automatic mode to cut the gate and mill and grind the injection molded workpiece without manual assistance. It has the advantages of high cutting accuracy, neat and burr-free cuts, and high cutting efficiency. The product clamp can clamp the injection molded workpiece and ensure that the injection molded workpiece does not fall off during the movement. This effect is achieved by firstly, by the tensioning action of the product clamping claw inside to hold the injection molded workpiece, and secondly, by the support cylinder driving the stop claw to block the injection molded workpiece. During the movement of the injection molded workpiece, the stop claw always blocks the front end face of the injection molded workpiece, which can prevent the injection molded workpiece from falling off and increase the clamping reliability during movement. 2) The product transfer assembly moves the product clamp by means of the transfer cylinder and the transfer drag chain, which can ensure that there is no shaking during the movement and the movement position is accurate, thus increasing the reliability of the product clamp movement. The pneumatic clamp set at the bottom of the guide rail can lock the guide rail and accurately position the product clamp, which facilitates the loading and unloading operations of the external robot and improves the operation accuracy. 3) This equipment is equipped with multiple sensors. Among them, the position sensor can detect whether an injection molded workpiece is placed in the product gripper, the vertical photoelectric sensor can detect whether the product fixture has moved to the loading / unloading position of the guide rail, the front-end sensor in the milling gate mechanism can detect the model of the milling cutter head, and the sensor on the buffer platform can determine whether there is an injection molded workpiece on the storage station. Through the above multiple sensors, each process can be accurately monitored during the transfer, cutting, grinding and loading / unloading process, improving processing accuracy, avoiding errors and omissions in processing, and improving processing stability. 4) In the support punching and shearing mechanism, the elastic support end can cooperate with the product fixture during cutting to clamp the injection molded workpiece from both ends. At the same time, the spring set in it provides elastic clamping force to the front end plate. This can avoid damage to the injection molded workpiece due to excessive force during clamping. The injection molded workpiece clamped from both ends can remain stationary. During the process of the pneumatic shear cutting the gate, the cutting is crisp and there is no shaking. The cut end face is neat, without stickiness or whitening, and the cutting quality is very high. 5) The milling gate mechanism can mill and grind the cut, the dust blowing metal hose can adjust the blowing direction according to the milling position, and the dust collection mechanism can suck and collect the chips, so that the chips will not drift into the environment during the milling process, keep the machine clean, and improve the cleanliness of the processing environment. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of an automatic gate cutting device according to the present invention; Figure 2 Assembly of the product clamp and product transfer assembly in this utility model Figure 1 ; Figure 3 Assembly of the product clamp and product transfer assembly in this utility model Figure 2 ; Figure 4 This is a structural diagram of the product transplanting component in this utility model; Figure 5 This is a structural diagram of the machine platform and its interior in this utility model; Figure 6 A diagram showing the layout of the punching and shearing mechanism and the milling and sprue mechanism on the machine platform; Figure 7 Structural diagram supporting the punching and shearing mechanism; Figure 8 This is an installation structure diagram of the milling gate mechanism and the dust collection mechanism; Figure 9 This is a structural diagram of the dust collection mechanism; Figure 10 This is a structural diagram of the caching platform; The components in the diagram are labeled as follows: Injection molded workpiece 1, machine base 2, waste hopper 21, material discharge opening 211, waste collection box 22, product fixture 3, outer shell 31, ejection mechanism 32, product gripper 33, support assembly 34, telescopic cylinder 341, material stop claw 342, position sensor 35, product transfer assembly 4, guide rail 41, slide plate 411, transfer electric cylinder 42, transfer drag chain 43, drive block 44, pneumatic clamp 45, vertical photoelectric sensor 46, support punching and shearing mechanism 5, vertical bracket 51, vertical 52. Straight cylinder, 53. Pneumatic shears, 54. Support cylinder, 541. Support frame, 55. Elastic support end, 55. Base plate, 551. End plate, 552. Front guide rod, 553. Rear guide rod, 554. Spring, 555. Milling gate mechanism, 6. Power head, 61. Air blowing nozzle, 62. Milling cutter head, 63. Front sensor, 64. Dust blowing metal hose, 65. Dust collection mechanism, 7. Extending cylinder, 71. Dust collection and suction chamber, 72. Circular enclosure, 721. Dust suction square tube, 722. Buffer platform, 8. Material storage station, 81. Sensor, 82. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] like Figure 1-10The diagram shows an automatic gate cutting device according to this utility model, including a machine base 2, a product clamp 3, a product transfer assembly 4, a supporting punching and shearing mechanism 5, a dust collection mechanism 7, and a gate milling mechanism 6. The machine base 2 is equipped with a product clamp 3, which holds an injection molded workpiece 1 fixedly on its left side. The product transfer assembly 4 is parallel to the product clamp 3 on its right side, and can drive the product clamp to move back and forth longitudinally. The machine base on the left side of the product clamp is also equipped with a supporting punching and shearing mechanism 5 and a gate milling mechanism 6, both of which are perpendicular to the moving direction of the product clamp. The product transfer assembly 4 drives the product clamp 3 to slide forward. The injection molded workpiece 1 held by the product clamp 3 first passes through the supporting punching and shearing mechanism 5 to complete the cutting operation, and then moves to be aligned with the front end of the gate milling mechanism 6. The gate milling mechanism 6 mills and grinds the cutting position of the injection molded workpiece 1. A dust collection mechanism 7 is provided on the periphery of the front end of the gate milling mechanism 6, and the debris generated by grinding is sucked up and collected by the dust collection mechanism 7.

[0018] The product transfer assembly 4 includes a guide rail 41, a transfer electric cylinder 42, and a transfer cable chain 43. A set of guide rails 41 are longitudinally arranged on the machine base 2. A slide plate 411 is provided on the guide rails 41. The bottom of the product clamp 3 is fixedly connected to the slide plate 411. The transfer electric cylinder 42 is arranged parallel to the right side of the guide rails 41. A drive block 44 is provided on the transfer electric cylinder 42. The right side plate of the product clamp 3's outer shell is fixedly connected to the drive block 44. The transfer cable chain 43 is located to the right of the transfer electric cylinder 42. The end of the transfer cable chain 43 is fixedly connected to the top of the drive block 44 via a bracket. The transfer electric cylinder 42 drives the product clamp 3 to slide back and forth along the guide rails 41. A pneumatic clamp 45 is provided at the bottom of the guide rails 41. The pneumatic clamp 45 can fix the product clamp 3 at the loading position. A vertical photoelectric sensor 46 is provided on the machine base outside the pneumatic clamp 45. The vertical photoelectric sensor 46 emits a sensing ray vertically upwards, which can monitor the positioning of the injection molded workpiece 1 in the vertical direction.

[0019] The product clamp 3 includes a housing 31, an ejection mechanism 32, product grippers 33, a support assembly 34, and a positioning sensor 35. The ejection mechanism 32 penetrates the housing, and the product gripper 33 is located at the front end of the ejection mechanism 32. The product gripper 33 penetrates the left side plate of the housing. The injection molded workpiece is circular, and the product gripper 33 clamps or releases the injection molded workpiece 1 from the inside. The long gate of the injection molded workpiece 1 is vertically located at its center. The ejection mechanism 32 can drive the product gripper 33 and the injection molded workpiece 1 to perform telescopic movements relative to the left side plate of the housing. The product gripper 33 has two sides respectively. The device includes a support assembly 34 and a positioning sensor 35. The support assembly 34 includes a telescopic cylinder 341 and a stop claw 342. The telescopic cylinder 341 is fixedly mounted on the left side plate of the housing. The front end of the telescopic cylinder 341 is connected to the stop claw 342. The telescopic cylinder 341 can drive the stop claw 342 to extend forward, so that the stop claw 342 is exactly blocking the outer surface of the injection molded workpiece 1, limiting the position of the injection molded workpiece in the clamping state. The positioning sensor 35 emits a detection ray, which is directed at the circumference of the injection molded workpiece. The positioning sensor 35 detects the positioning status of the injection molded workpiece in real time.

[0020] A buffer platform 8 is also provided at one corner of the machine 2. The buffer platform 8 is equipped with multiple material storage stations 81. Each material storage station 81 can buffer one injection molded workpiece 1. The buffer platform 8 is also equipped with a sensor 82 to monitor the arrival status of the injection molded workpiece 1.

[0021] The supporting punching and shearing mechanism 5 includes a vertical bracket 51, a vertical cylinder 52, a pneumatic shear 53, a supporting cylinder 54, and an elastic supporting end 55. The vertical bracket 51 is mounted on the machine base 2 and has an inverted L-shaped structure. The vertical cylinder 52 is installed at the front end of the top of the vertical bracket 51, and the pneumatic shear 53 is fixedly connected to the bottom of the vertical cylinder 52. The vertical cylinder 52 drives the pneumatic shear 53 to move up and down, and the pneumatic shear 53 can cut off the gate of the injection molded workpiece 1. The supporting cylinder 54 is horizontally set through the lower part of the vertical bracket 51. The bottom of the supporting cylinder 54 is provided with a support frame 541, and the front end of the supporting cylinder 54 is connected to the elastic supporting end 55. The supporting cylinder 54 drives the elastic supporting end 55 to move horizontally forward, so that the elastic supporting end 55 elastically abuts against the end face of the injection molded workpiece 1, limiting the position of the injection molded workpiece. The elastic support end 55 includes a base plate 551, an end plate 552, a front guide rod 553, a rear guide rod 554, and a spring 555. The base plate 551 is fixedly connected to the piston of the support cylinder 54. The end plate 552 is correspondingly positioned in front of the base plate 551. Three front guide rods 553 are fixedly connected through the end plate 552. The base plate 551 has three holes for the front guide rods 553 to pass through. Three rear guide rods 554 are fixedly connected to the front end face of the base plate 551. The end plate 552 has three holes for the rear guide rods 554 to pass through. The front guide rods 553 and the rear guide rods 554 are spaced apart circumferentially. A spring 555 is provided on the outer side of each rear guide rod 554. The two ends of the spring 555 are respectively connected to the base plate 551 and the end plate 552. The front end face of the end plate 552 is pushed backward by the injection molded workpiece 1, and the spring 555 provides elastic support to the end plate 552.

[0022] The milling gate mechanism 6 includes a power head 61, an air nozzle 62, a milling cutter head 63, and a front-end sensor 64. The front end of the power head 61 is connected to the milling cutter head 63, which is perpendicularly aligned with the direction of movement of the injection molded workpiece. The milling cutter head 63 can mill and grind the gate cutting area. A base is provided on the rear side of the milling cutter head 63, and dust blowing metal hoses 65 are symmetrically arranged on both sides of the base. The dust blowing metal hoses 65 can be bent and shaped at will. The bottom end of the dust blowing metal hoses 65 is connected to a compressed air source, and the top end of the dust blowing metal hoses 65 is the air nozzle 62. The air nozzle 62 is flat and can be adjusted in any direction to blow air onto the milling cutter head 63. The front-end sensor 64 is located next to the milling cutter head 63 and can identify the model of the milling cutter head.

[0023] The dust collection mechanism 7 includes an extension cylinder 71 and a dust collection chamber 72. The extension cylinder 71 is fixedly installed on the machine base below the milling cutter head 63. The front end of the extension cylinder 71 is connected to the dust collection chamber 72. The dust collection chamber 72 includes an annular baffle 721 and a dust collection square tube 722. The annular baffle 721 is located in front of the milling cutter head 63. The injection molded workpiece is extended into the annular baffle 721 for milling operations. The bottom of the annular baffle 721 is connected to the dust collection square tube 722. The dust collection square tube 722 sucks up the processing debris in the annular baffle 721, and the processing debris falls downward through the dust collection square tube 722. The extension cylinder 71 is connected to the rear side of the dust collection square tube 722. The extension cylinder 71 drives the entire dust collection chamber 72 to extend and retract along the milling processing axis.

[0024] Below the table of the machine base 2, there is a waste hopper 21. The top of the waste hopper 21 has a discharge opening 211 on the machine base 2. The discharge opening 211 is directly opposite the front end of the supporting punching and shearing mechanism 5 and the milling gate mechanism 6. The bottom end of the dust suction square tube 722 is opposite to the discharge opening 211. The bottom of the machine base 2 is equipped with a waste collection box 22 opposite to the waste hopper 21. The cut gate and the grinding debris are collected in the waste collection box 22 through the waste hopper 21.

[0025] The operation process of this utility model is as follows: The external robotic arm places the injection molded workpiece 1 to be processed onto the product gripper 33 on the outside of the product fixture 3. The product gripper 33 moves outward to tighten the injection molded workpiece 1. After the position sensor 35 senses that the injection molded workpiece has been loaded, the telescopic cylinder 341 drives the stop claw 342 to extend, so that the stop claw 342 blocks the outer end face of the injection molded workpiece 1. During the loading process, the pneumatic clamp 45 locks the product fixture 3, keeping the product fixture 3 stationary. Subsequently, the pneumatic clamp 45 releases, and the electric transfer... Cylinder 42 drives product clamp 3 to slide forward along guide rail 41 via drive block 44. When product clamp 3 moves to the front of support punching and shearing mechanism 5, it stops, the stop claw 342 retracts, and ejection mechanism 32 ejects product clamp 33 outward. At the same time, support cylinder 54 drives elastic support end head 55 to push outward. The end plate 552 of elastic support end head 55 presses against the outer end face of injection molded workpiece 1, and spring 555 is compressed. Spring 555 applies elastic pressing force to end plate 552. The injection molded workpiece is pressed firmly on both sides below pneumatic shear 53, vertically... The pneumatic cylinder 52 drives the pneumatic shears 53 downwards, cutting off the gate. The cut gate falls into the waste hopper 21 through the discharge opening. After cutting, the ejector mechanism 32 retracts, and the retaining claw 342 extends again to block the end face of the injection molded workpiece. The transfer cylinder 42 moves the product clamp 3 to the front end of the gate milling mechanism 6. The retaining claw 342 retracts, and the ejector mechanism 32 extends the injection molded workpiece into the annular enclosure 721. The milling cutter head 63 contacts the cut of the injection molded workpiece 1 inside the annular enclosure 721. The power head 61 drives the milling cutter head 63 to cut off the gate. The cutting head 63 rotates and grinds, and the chips generated by grinding enter the material discharge opening 211 through the dust suction square tube 722. The chips also enter the waste hopper 21. The chips and the cut gate fall into the waste collection box 22 through the waste hopper 21. The injection molded workpiece 1 that has been ground retracts, the stop claw 342 extends to fix the injection molded workpiece, the transfer electric cylinder 42 moves the product clamp 3 to the starting position, the pneumatic clamp 45 locks the product clamp 3, and the external robot arm removes the processed injection molded workpiece 1 and places it on the storage station 81 of the buffer platform 8.

[0026] The above descriptions are merely several preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations and substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. An automatic gate cutting device, characterized in that: The system includes a machine base, a product fixture, a product transfer assembly, a support punching and shearing mechanism, a dust collection mechanism, and a milling and sprue mechanism. The machine base has a product fixture with the injection molded workpiece fixedly held on its left side. A parallel product transfer assembly is located on the right side of the product fixture, driving the fixture to reciprocate longitudinally. The machine base to the left of the product fixture also has a support punching and shearing mechanism and a milling and sprue mechanism, both perpendicular to the movement direction of the product fixture. The product transfer assembly drives the product fixture to slide forward. The injection molded workpiece held by the product fixture first undergoes a cutting operation via the support punching and shearing mechanism before moving to align with the front end of the milling and sprue mechanism. The milling and sprue mechanism mills and grinds the cutting position of the injection molded workpiece. A dust collection mechanism is located around the front end of the milling and sprue mechanism, collecting the grinding debris.

2. The automatic gate cutting device according to claim 1, characterized in that: The product fixture includes a housing, an ejection mechanism, product grippers, support components, and a positioning sensor. The ejection mechanism penetrates the housing, and a product gripper is located at its front end, penetrating the left side plate of the housing. The injection molded workpiece is circular, and the product gripper clamps or releases the workpiece from the inside. The long gate of the injection molded workpiece is vertically positioned at its center. The ejection mechanism can drive the product gripper and the injection molded workpiece to extend and retract relative to the left side plate of the housing. Support components and positioning sensors are respectively located on both sides of the product gripper. The support components include a telescopic cylinder and a stop claw. The telescopic cylinder is fixedly mounted on the left side plate of the housing, and the front end of the telescopic cylinder is connected to the stop claw. The telescopic cylinder can drive the stop claw to extend forward, so that the stop claw blocks the outer surface of the injection molded workpiece, limiting the position of the injection molded workpiece in the clamped state. The positioning sensor emits a detection ray, which is directed towards the circumference of the injection molded workpiece, and the positioning sensor detects the positioning status of the injection molded workpiece in real time.

3. The automatic gate cutting device according to claim 1, characterized in that: The product transfer assembly includes a guide rail, a transfer electric cylinder, and a transfer cable chain. A set of guide rails is arranged longitudinally on the machine platform, and a slide plate is provided on the guide rail. The bottom of the product clamp is fixedly connected to the slide plate. The transfer electric cylinder is arranged parallel to the right side of the guide rail, and a drive block is provided on the transfer electric cylinder. The right side plate of the product clamp housing is fixedly connected to the drive block. The transfer cable chain is arranged on the right side of the transfer electric cylinder, and the end of the transfer cable chain is fixedly connected to the top of the drive block through a bracket. The transfer electric cylinder drives the product clamp to slide back and forth along the guide rail.

4. The automatic gate cutting device according to claim 3, characterized in that: The bottom of the guide rail is equipped with a pneumatic clamp, which can fix the product clamp in the loading position. A vertical photoelectric sensor is provided on the machine base outside the pneumatic clamp. The vertical photoelectric sensor emits sensing rays vertically upward, which can monitor the positioning of the injection molded workpiece in the vertical direction.

5. The automatic gate cutting device according to claim 1, characterized in that: The supporting punching and shearing mechanism includes a vertical bracket, a vertical cylinder, pneumatic shears, a supporting cylinder, and an elastic supporting end. The vertical bracket is mounted on the machine base and has an inverted L-shaped structure. A vertical cylinder is installed at the front end of the top of the vertical bracket, and a pneumatic shear is fixedly connected to the bottom of the vertical cylinder. The vertical cylinder drives the pneumatic shear to move up and down, and the pneumatic shear can cut off the gate of the injection molded workpiece. The supporting cylinder is horizontally set through the lower part of the vertical bracket, and a support frame is provided at the bottom of the supporting cylinder. An elastic supporting end is connected to the front end of the supporting cylinder. The supporting cylinder drives the elastic supporting end to move horizontally forward, so that the elastic supporting end elastically abuts against the end face of the injection molded workpiece, limiting the position of the injection molded workpiece.

6. An automatic gate cutting device according to claim 5, characterized in that: The elastic support end includes a base plate, an end plate, a front guide rod, a rear guide rod, and a spring. The base plate is fixedly connected to the piston of the support cylinder. The end plate is correspondingly positioned in front of the base plate, and three front guide rods are fixedly connected through the end plate. The base plate has three holes for the front guide rods to pass through. Three rear guide rods are fixedly connected to the front end face of the base plate, and the end plate has three holes for the rear guide rods to pass through. The front and rear guide rods are spaced apart circumferentially. A spring is provided on the outer side of each rear guide rod, and the two ends of the spring are respectively connected to the base plate and the end plate. When the front end face of the end plate is pushed backward by the injection molded workpiece, the spring provides elastic support to the end plate.

7. The automatic gate cutting device according to claim 1, characterized in that: The gate milling mechanism includes a power head, an air nozzle, a milling cutter head, and a front-end sensor. The front end of the power head is connected to the milling cutter head, which is perpendicularly aligned with the direction of movement of the injection molded workpiece. The milling cutter head can mill and grind the gate cutting area. A base is provided on the rear side of the milling cutter head, and dust blowing metal hoses are symmetrically arranged on both sides of the base. The dust blowing metal hoses can be bent and shaped at will. The bottom end of the dust blowing metal hose is connected to a compressed air source, and the top end of the dust blowing metal hose is a flat air nozzle. The air nozzle can be adjusted in any direction to blow air onto the milling cutter head. The front-end sensor is located next to the milling cutter head and can identify the model of the milling cutter head.

8. An automatic gate cutting device according to claim 7, characterized in that: The dust collection mechanism includes an extension cylinder and a dust collection chamber. The extension cylinder is fixedly installed on the machine base below the milling cutter head. The front end of the extension cylinder is connected to the dust collection chamber, which includes an annular baffle and a suction tube. The annular baffle is located in front of the milling cutter head. The injection molded workpiece is extended into the annular baffle for milling operations. The bottom of the annular baffle is connected to the suction tube, which sucks up the machining debris inside the annular baffle. The machining debris falls downward through the suction tube. The extension cylinder is connected to the rear side of the suction tube and drives the entire dust collection chamber to extend and retract along the milling machining axis.

9. An automatic gate cutting device according to claim 1, characterized in that: Below the machine table is a waste hopper, with the top of the waste hopper having a discharge opening on the machine table. The discharge opening faces the front end of the supporting punching and shearing mechanism and the milling gate mechanism. The bottom end of the dust suction square tube is opposite to the discharge opening. At the bottom of the machine table is a waste collection box opposite to the waste hopper. The cut gates and grinding debris fall into the waste collection box through the waste hopper and are collected.

10. An automatic gate cutting device according to claim 1, characterized in that: A buffer platform is also provided at one corner of the machine. The buffer platform has multiple material storage stations, each of which can buffer one injection molded workpiece. The buffer platform is also equipped with sensors to monitor the arrival status of the injection molded workpiece.

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