An automatic cutting device for plastic molds

Abstract

This invention relates to the field of plastic processing, and more particularly to an automatic cutting device for plastic molds. The device includes a cutting table, a top plate fixed to the upper end of the cutting table via a support rod, a drive cylinder fixed to the center of the top plate, an mounting plate axially slidably mounted on the support rod, and a cutting mechanism at the bottom of the mounting plate. The cutting mechanism includes a fixed frame fixed to the mounting plate, a housing fixed inside the fixed frame, a cutting blade rotatably mounted inside the housing, a drive assembly for driving the cutting blade to rotate fixed to the side wall of the fixed frame, a ventilation pipe for blowing air to cool the cutting blade fixed to the outer wall of the housing, a sleeve fixed to one side of the housing, a pressure rod slidably passing through the sleeve, and a pressure plate flush with the bottom of the cutting blade fixed to the bottom of the pressure rod. This invention can adaptively adjust the cooling intensity of the cutting blade according to the cutting depth to meet the cooling needs during the cutting of workpieces of different thicknesses, and has a wide range of applications.

Description

Technical Field

[0001] This invention relates to the field of plastic processing technology, and in particular to an automatic cutting device for plastic molds. Background Technology

[0002] Plastic molds (referring to molds made of plastic materials) are low-melting-point, low-pressure molding tools made from engineering plastics or epoxy resins. Compared with traditional steel molds, they have advantages such as low cost, short development cycle, and ease of processing complex shapes.

[0003] To meet molding requirements, plastic molds need to cut raw materials during processing. For materials of varying thicknesses, the blades often need to cut to different depths during the cutting process. At this time, the blades will also generate varying degrees of frictional heat. Current cutting equipment generally uses simple air cooling to cool the blades when cutting plastics, but it cannot control the degree of cooling according to the heat dissipation requirements of the blades. Insufficient cooling will lead to excessively high cutting temperatures, which may cause the raw materials to melt and stick to the blade. Excessive cooling will cause thermal fatigue of the blades and affect their service life. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic cutting device for plastic molds, which aims to solve the above-mentioned technical problems.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An automatic cutting device for plastic molds includes a cutting table. A top plate is fixed to the upper end of the cutting table via a support rod. A drive cylinder is fixed to the center of the top plate. An mounting plate is axially slidably mounted on the support rod. The output end of the drive cylinder is connected to the mounting plate. A cutting mechanism is provided at the bottom of the mounting plate. The cutting mechanism includes a fixed frame fixed to the mounting plate. A cover is fixed inside the fixed frame. A cutting blade is rotatably mounted inside the cover. A drive assembly for driving the cutting blade to rotate is fixed to the side wall of the fixed frame. A ventilation pipe for blowing air to cool the cutting blade is fixed to the outer wall of the cover. A sleeve is fixedly installed on one side of the cover, and a pressure rod is slidably installed through the sleeve. A pressure plate flush with the bottom of the cutting blade is fixedly connected to the bottom of the pressure rod. The pressure plate abuts against the surface of the workpiece and adjusts the cooling intensity of the air blowing in the ventilation pipe according to the cutting depth. A chip removal groove is provided in the center of the cutting table, and a rotating groove is provided around the chip removal groove. A turntable is rotatably installed in the rotating groove. A material placement groove is provided at the upper end of the turntable. Sliding clamps are slidably installed on both sides of the material placement groove. An air passage mechanism is provided at the bottom of the cutting table. The air passage mechanism is used to drive the sliding clamps to clamp the workpiece and simultaneously clean the chips in the chip removal groove.

[0007] As a further aspect of the present invention: the drive assembly includes a housing, the housing is fixedly connected to one side of the fixing frame, a drive motor is fixedly mounted on the side wall of the housing, the output end of the drive motor is connected to a cutting shaft via a transmission belt, and the cutting shaft passes through the housing and is connected to a cutting blade.

[0008] As a further embodiment of the present invention: a stop block is fixedly provided at the top of the pressure rod, the stop block is slidably installed in the sleeve, a compression spring is provided between the upper end of the stop block and the sleeve, a displacement sensor for monitoring the moving distance of the stop block is provided at the top of the sleeve, a push rod is fixedly provided at the upper end of the stop block, and the top end of the push rod passes through the sleeve and is fixedly provided with a lever.

[0009] As a further embodiment of the present invention: a variable frequency fan is fixedly mounted on one side of the mounting plate, the ventilation pipe is connected to the air outlet of the variable frequency fan through an air inlet pipe, a proportional regulating valve is provided on the air inlet pipe, the displacement sensor is communicatively connected to the proportional regulating valve, a cooler for cooling the air inlet pipe is fixedly mounted on one side of the mounting bracket, an elastic bow plate is fixedly mounted on one side of the cooler, and a contact switch for controlling start and stop is also installed on the cooler, the elastic bow plate is located above the toggle block and directly opposite the contact switch.

[0010] As a further aspect of the present invention: a plurality of nozzles are uniformly connected on the ventilation pipe, and the nozzles are inclined so that the airflow direction is toward the root of the tooth groove of the cutting blade.

[0011] As a further embodiment of the present invention: the air circuit mechanism includes a four-way rotary joint, piston cylinders are fixedly provided at both ends of the bottom of the turntable, the left and right ends of the four-way rotary joint are connected to the bottom of the piston cylinders through air pipes, a fixed air duct is fixedly provided at the bottom of the cutting table, the top end of the four-way rotary joint is rotatably and sealingly engaged with the fixed air duct, the bottom end of the four-way rotary joint is rotatably and sealingly engaged with the suction pipe, an air pump is provided on one side of the cutting table, and the suction pipe is connected to the output end of the air pump.

[0012] As a further aspect of the present invention: an adjustment motor is fixedly provided at the bottom of the cutting table, and the output end of the adjustment motor drives the turntable to rotate and adjust through a transmission component; a chip discharge hole is provided through the bottom of the chip removal groove; and an arc-shaped groove for the piston cylinder to rotate is provided through the bottom of the rotating groove.

[0013] As a further aspect of the present invention, the rotation adjustment angle range of the turntable is 0-160°.

[0014] As a further embodiment of the present invention: a rotating rod is coaxially rotatably installed inside the fixed air duct, the bottom end of the rotating rod extends into the fixed air duct and is fixedly connected to a fan blade, the top end of the rotating rod extends into the chip removal groove and is evenly connected to a scraper, the bottom of the scraper is attached to the chip removal groove, and a negative pressure suction nozzle is evenly connected to the fixed air duct, the negative pressure suction nozzle is connected to the corresponding chip removal hole.

[0015] As a further aspect of the present invention: a sliding groove is provided on the turntable, the sliding clamp is adapted to be slidably installed in the sliding groove, a relief cavity is provided at the bottom of the sliding groove, a set of connecting rods are symmetrically arranged in the relief cavity, a piston rod is slidably inserted through the center of the bottom of the relief cavity, one end of the connecting rod is rotatably engaged with the bottom of the corresponding sliding clamp, the other end of the connecting rod is rotatably engaged with the top of the piston rod, the bottom end of the piston rod is adapted to slide with the corresponding piston cylinder, and a return spring is provided between the top of the piston rod and the bottom of the relief cavity.

[0016] The beneficial effects of this invention are:

[0017] (1) By setting up a turntable and a cutting mechanism, the plastic mold is placed in the material slot on the turntable. The turntable is rotated and adjusted according to actual needs, so that the workpiece can be cut at different angles. During cutting, as the cutting blade slowly penetrates, the pressure plate will move upward relative to the cutting blade, and the wind speed, air volume and temperature of the air flowing in the ventilation pipe are controlled and adjusted accordingly according to the displacement distance. When cutting thinner workpieces, the relative displacement distance of the pressure plate is small, and the intensity of air cooling is low. When cutting thicker workpieces, the relative displacement distance of the pressure plate is large, and the intensity of air cooling is high. Thus, the cooling intensity of the cutting blade is adaptively adjusted according to the cutting depth to meet the cooling needs of workpieces of different thicknesses during the cutting process. It has a wide range of applications.

[0018] (2) By setting up sliding clamps and air circuit mechanism, during the cutting process, the air pump starts to draw air through the suction pipe. At this time, the air pressure inside the piston cylinder decreases, and the pressure difference will drive the sliding clamps at both ends to move closer to each other until they abut against the workpiece to achieve clamping and limiting of the workpiece. At the same time, the fixed air duct will generate negative pressure suction in the chip removal hole through the negative pressure suction nozzle, so that the chips in the chip removal groove can be sucked into the chip removal hole and discharged downward. At the same time, the rotating rod will drive the scraper to rotate and scrape in the chip removal groove, thereby effectively scraping and cleaning the molten chips to avoid sintering and accumulation. A set of negative pressure air circuit system can realize the workpiece clamping process and the chip removal and cleaning process at the same time. The two work together and make full and effective use of negative pressure airflow. The structure is ingenious and compact, the transmission process is stable and reliable, and the practicality is strong. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the full cross-section of the present invention.

[0022] Figure 3 This is a schematic diagram of the cutting mechanism in this invention.

[0023] Figure 4 This is a cross-sectional structural diagram of the cutting mechanism in this invention.

[0024] Figure 5 yes Figure 4 Enlarged diagram of point A in the middle.

[0025] Figure 6 This is a schematic diagram of the arrangement of the ventilation ducts in this invention.

[0026] Figure 7 This is a schematic diagram of the end face structure of the cutting table in this invention.

[0027] Figure 8 This is a bottom view of the cutting table in this invention.

[0028] Figure 9 This is a schematic diagram of the gas path mechanism in this invention.

[0029] Figure 10 This is a schematic diagram of the internal structure of the turntable in this invention.

[0030] Figure 11 This is another internal structural diagram of the turntable in this invention.

[0031] Figure 12 This is a schematic diagram of the sliding clamp in this invention.

[0032] In the picture:

[0033] 100. Cutting table; 1001. Chip chute; 1002. Chip removal hole; 1003. Rotary groove; 1004. Arc groove; 110. Support rod; 120. Top plate; 130. Drive cylinder; 140. Mounting plate; 150. Variable frequency fan; 160. Adjustable motor; 161. Transmission component;

[0034] 200. Cutting mechanism; 210. Fixing frame; 211. Cooler; 2111. Elastic bow plate; 2112. Contact switch; 220. Cover; 230. Cutting blade; 240. Drive assembly; 241. Housing; 242. Drive motor; 243. Cutting shaft; 244. Drive belt; 250. Ventilation duct; 251. Air inlet duct; 252. Proportional regulating valve; 253. Nozzle; 260. Sleeve; 261. Pressure rod; 262. Pressure plate; 263. Stop block; 264. Compression spring; 265. Displacement sensor; 266. Push rod; 2661. Toggle block;

[0035] 300, Turntable; 3001, Sliding groove; 3002, Displacement cavity; 310, Material chute; 320, Sliding clamp; 330, Connecting rod; 340, Piston rod; 341, Return spring;

[0036] 400. Air passage mechanism; 410. Four-way rotary joint; 420. Piston cylinder; 430. Fixed air duct; 431. Rotating rod; 432. Fan blade; 433. Scraper; 434. Negative pressure nozzle; 440. Suction pipe;

[0037] 500. Air pump. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figures 1-9As shown, this invention is an automatic cutting device for plastic molds, including a cutting table 100. A top plate 120 is fixedly connected to the upper end of the cutting table 100 via a support rod 110. A drive cylinder 130 is fixedly mounted in the center of the top plate 120. An mounting plate 140 is axially slidably mounted on the support rod 110. The output end of the drive cylinder 130 is connected to the mounting plate 140. A cutting mechanism 200 is provided at the bottom of the mounting plate 140. The cutting mechanism 200 includes a fixed frame 210 fixedly connected to the mounting plate 140. A cover 220 is fixedly mounted inside the fixed frame 210. A cutting blade 230 is rotatably mounted inside the cover 220. A drive assembly 240 for driving the cutting blade 230 to rotate is fixedly mounted on the side wall of the fixed frame 210. A ventilation pipe 25 for blowing air to cool the cutting blade 230 is fixedly mounted on the outer wall of the cover 220. 0. A sleeve 260 is fixedly provided on one side of the cover 220. A pressure rod 261 is slidably installed through the sleeve 260. A pressure plate 262, which is flush with the bottom of the cutting blade 230, is fixedly connected to the bottom of the pressure rod 261. The pressure plate 262 abuts against the surface of the workpiece and adjusts the cooling intensity of the air blown in the ventilation pipe 250 according to the cutting depth. A chip removal groove 1001 is provided in the center of the cutting table 100. A rotating groove 1003 is provided around the chip removal groove 1001. A turntable 300 is rotatably installed in the rotating groove 1003. A material placement groove 310 is provided at the upper end of the turntable 300. Sliding clamps 320 are linearly slidably installed on both sides of the material placement groove 310. An air passage mechanism 400 is provided at the bottom of the cutting table 100. The air passage mechanism 400 is used to drive the sliding clamps 320 to clamp the workpiece and simultaneously clean the chip in the chip removal groove 1001.

[0040] Specifically, by setting up a turntable 300 and a cutting mechanism 200, the workpiece material is placed in the material storage groove 310 on the turntable 300. The turntable 300 is rotated and adjusted according to actual needs, thereby enabling the workpiece to be cut at different angles. During cutting, the drive cylinder 130 pushes the mounting plate 140 down, causing the cutting blade 230 to gradually approach the workpiece until the pressure plate 262 is always pressed against the workpiece surface. At this point, the cutting blade 230 will begin cutting. As the cutting blade 230 slowly penetrates deeper, the pressure plate 262 will... The airflow mechanism 400 moves upward relative to the cutting blade 230, and adjusts the airflow speed, volume, and temperature within the ventilation duct 250 accordingly based on the displacement distance. When cutting thinner workpieces, the relative displacement distance of the pressure plate 262 is smaller, resulting in lower cooling intensity. Conversely, when cutting thicker workpieces, the relative displacement distance of the pressure plate 262 is larger, resulting in higher cooling intensity. This adaptive adjustment of the cooling intensity of the cutting blade 230 based on the cutting depth adapts to the cooling requirements of cutting workpieces of varying thicknesses. Simultaneously, the airflow mechanism 400 drives the sliding clamps 320 on both sides to move closer together, effectively clamping and limiting the workpiece to prevent vibration during cutting and thus maintain the cutting effect. Furthermore, the airflow mechanism 400 promptly cleans the cutting debris from the chip groove 1001, preventing molten slag from accumulating and agglomerating within it.

[0041] like Figure 4 As shown, the drive assembly 240 includes a housing 241, which is fixed to one side of the mounting bracket 210. A drive motor 242 is fixed on the side wall of the housing 241. The output end of the drive motor 242 is connected to a cutting shaft 243 via a transmission belt 244. The cutting shaft 243 passes through the cover 220 and is connected to the cutting blade 230.

[0042] Specifically, both the drive motor 242 spindle and the cutting shaft 243 are equipped with drive wheels, which are connected by a drive belt 244. When the drive motor 242 starts, it drives the cutting blade 230 to rotate at high speed through the drive belt 244 to smoothly achieve the cutting function. The drive wheels and drive belt 244 are arranged inside the housing 241, which can effectively reduce noise and prevent accidental contact to improve operational safety.

[0043] like Figure 4 and Figure 5 As shown, a stop block 263 is fixedly provided at the top of the pressure rod 261. The stop block 263 is slidably installed inside the sleeve 260. A compression spring 264 is provided between the upper end of the stop block 263 and the sleeve 260. A displacement sensor 265 for monitoring the moving distance of the stop block 263 is provided at the top of the sleeve 260. A push rod 266 is fixedly provided at the upper end of the stop block 263. The top end of the push rod 266 passes through the sleeve 260 and is fixedly provided with a lever 2661.

[0044] Furthermore, a variable frequency fan 150 is fixedly mounted on one side of the mounting plate 140. The ventilation duct 250 is connected to the air outlet of the variable frequency fan 150 through the air inlet duct 251. A proportional regulating valve 252 is installed on the air inlet duct 251. The displacement sensor 265 is communicatively connected to the proportional regulating valve. A cooler 211 for cooling the air inlet duct 251 is fixedly mounted on one side of the mounting bracket 210. An elastic bow plate 2111 is fixedly mounted on one side of the cooler 211. A contact switch 2112 for controlling start and stop is also installed on the cooler 211. The elastic bow plate 2111 is located above the toggle block 2661 and directly opposite the contact switch 2112.

[0045] Specifically, in the initial state, the pressure plate 262 is flush with the bottom of the cutting blade 230. When the cutting blade 230 begins to cut the workpiece, the pressure plate 262 will also press against the surface of the workpiece. As the cutting blade 230 continues to penetrate deeper, the stop block 263 moves upward within the sleeve 260 and compresses the compression spring 264. At this time, the displacement sensor 265 monitors the displacement distance of the stop block 263 in real time and converts the detection data into an electronic control signal, which is then transmitted to the proportional regulating valve 252 to adjust and control the airflow speed and volume in the air inlet pipe 251. This allows the cooling effect of the ventilation pipe 250 on the cutting blade 230 to be enhanced accordingly with the increase of the cutting depth. During this process, the push rod 266 moves upward synchronously with the stop block 263. When the cutting depth is thick, the toggle block 2661 on the push rod 266 moves accordingly past the elastic bow plate 2111, causing the elastic bow plate 2111 to be squeezed and triggering the contact switch 2112. At this time, the cooler 211 starts to cool the air in the ventilation pipe 250. This allows the cooling of the circulating air to be achieved when the cutting blade 230 cuts too deep and needs rapid heat dissipation. Combined with the increase in wind speed and air volume, the cooling intensity of the cutting blade 230 is greatly enhanced. When the cutting blade 230 retracts upward, the push rod 266 drives the toggle block 2661 to move downward and pass past the elastic bow plate 2111 again, thereby triggering the contact switch 2112 to shut down the cooler 211. This allows the cooler 211 to automatically start and stop according to the cooling needs of the cutting blade 230.

[0046] like Figure 6 As shown, a number of nozzles 253 are evenly connected on the ventilation pipe 250. The nozzles 253 are tilted so that the air blowing direction is towards the root of the tooth groove of the cutting blade 230. At this time, the airflow blown out by the nozzles 253 can dissipate heat from the tip of the tooth to the center of the blade, with the highest heat dissipation efficiency. At the same time, it also takes into account chip removal and can effectively blow away the material chips stuck in the root of the tooth groove.

[0047] like Figure 9 and Figure 10As shown, the air circuit mechanism 400 includes a four-way rotary joint 410. Piston cylinders 420 are fixed at both ends of the bottom of the turntable 300. Both the left and right ends of the four-way rotary joint 410 are connected to the bottom of the piston cylinders 420 through air pipes. A fixed air duct 430 is fixed at the bottom of the cutting table 100. The top end of the four-way rotary joint 410 is rotatably and sealingly engaged with the fixed air duct 430, and the bottom end of the four-way rotary joint 410 is rotatably and sealingly engaged with the suction pipe 440. An air pump 500 is provided on one side of the cutting table 100, and the suction pipe 440 is connected to the output end of the air pump 500.

[0048] Specifically, by setting up a four-way rotary joint 410, when the turntable 300 drives the workpiece to adjust the cutting angle, the piston cylinders 420 at both ends and the four-way rotary joint 410 will rotate synchronously with the turntable 300. During the rotation, the four-way rotary joint 410 can still maintain good airtightness with the fixed air duct 430 and the suction pipe 440, thus ensuring smooth airflow while also taking into account the synchronous rotational movement with the turntable 300.

[0049] like Figures 7-9 As shown, an adjustment motor 160 is fixedly installed at the bottom of the cutting table 100. The output end of the adjustment motor 160 drives the turntable 300 to rotate and adjust through the transmission component 161. A chip discharge hole 1002 is provided through the bottom of the chip trough 1001, and an arc-shaped groove 1004 for the piston cylinder 420 to rotate is provided through the bottom of the rotating groove 1003.

[0050] Furthermore, the rotation adjustment angle range of the turntable 300 is 0-160°.

[0051] Specifically, when the cutting angle of the workpiece needs to be adjusted, the adjusting motor 160 drives the turntable 300 to rotate through the transmission component 161 until the turntable 300 rotates to the required tilt angle. In this embodiment, the transmission component 161 can be a gear, belt, etc. The arc groove 1004 provides room for the synchronous rotation adjustment of the piston cylinder 420, avoiding structural interference. At the same time, due to the presence of the arc groove 1004, the turntable 300 is subject to rotational constraints and does not rotate 360° without dead angles. In this embodiment, the rotation adjustment angle range of the turntable 300 is 0-160°. Under the premise of ensuring the overall support rigidity and structural strength of the cutting table 100, it can meet the cutting requirements of most raw material workpieces at different angles.

[0052] like Figures 10-12As shown, a rotating rod 431 is coaxially rotatably installed inside the fixed air duct 430. The bottom end of the rotating rod 431 extends into the fixed air duct 430 and is fixedly connected to a fan blade 432. The top end of the rotating rod 431 extends into the chip trough 1001 and is evenly connected to a scraper 433. The bottom of the scraper 433 is attached to the chip trough 1001. Negative pressure suction nozzles 434 are evenly connected to the fixed air duct 430 and are connected to the corresponding chip discharge holes 1002.

[0053] Furthermore, the turntable 300 is provided with a sliding groove 3001, and the sliding clamp 320 is adapted to slide within the sliding groove 3001. A relief cavity 3002 is provided at the bottom of the sliding groove 3001. A set of connecting rods 330 are symmetrically arranged in the relief cavity 3002. A piston rod 340 is slidably inserted through the center of the bottom of the relief cavity 3002. One end of the connecting rod 330 is rotatably engaged with the bottom of the corresponding sliding clamp 320, and the other end of the connecting rod 330 is rotatably engaged with the top of the piston rod 340. The bottom end of the piston rod 340 is adapted to slide with the corresponding piston cylinder 420. A return spring 341 is provided between the top end of the piston rod 340 and the bottom of the relief cavity 3002.

[0054] Specifically, by setting up sliding clamping plates 320 and air passage mechanism 400, during the cutting process, air pump 500 starts to draw air through suction pipe 440. At this time, the air pressure inside piston cylinder 420 decreases, and the pressure difference will drive piston rod 340 to move downward and squeeze return spring 341. At the same time, the connecting rod 330 drives the sliding clamping plates 320 at both ends to move closer to each other until they abut against the workpiece to achieve clamping and limiting of the workpiece. Meanwhile, fixed air duct 430 will draw air through negative pressure nozzle 434... A negative pressure suction is generated within the chip removal hole 1002, allowing chips in the chip removal groove 1001 to be drawn into the hole and discharged downwards. For molten chips sintered with the chip removal groove 1001 at high temperatures, the continuous airflow in the fixed air duct 430 drives the fan blades 432 to rotate. The fan blades 432 then drive the rotating rod 431 to rotate, which in turn drives the scraper 433 to rotate and scrape within the chip removal groove 1001. This effectively removes and cleans the molten chips, preventing sintering and accumulation. A single negative pressure air circuit system can simultaneously achieve the workpiece clamping process and the chip removal process. The two processes work together in a coordinated manner, fully and effectively utilizing the negative pressure airflow. The structure is ingenious and compact, the transmission process is stable and reliable, and it is highly practical.

[0055] The working principle of this invention is as follows: Figures 1-12As shown, during use, the raw material is first placed in the material trough 310 on the turntable 300. The air pump 500 starts to draw air through the suction pipe 440. At this time, the air pressure inside the piston cylinder 420 decreases, and the pressure difference will drive the piston rod 340 to move downward and squeeze the return spring 341. At the same time, the connecting rod 330 drives the sliding clamps 320 at both ends to move closer to each other until they abut against the workpiece to achieve clamping and limiting of the workpiece. When it is necessary to adjust the cutting angle of the raw material, the adjusting motor 160 drives the turntable 300 to rotate through the transmission component 161 until the turntable 300 rotates to the required tilt angle. During cutting, the drive cylinder 130 pushes the mounting plate 140 down, causing the cutting blade 230 to gradually approach the workpiece until the pressure plate 262 is always pressed against the workpiece surface. At this time, the cutting blade 230 will also begin to cut. As the cutting blade 230 slowly penetrates deeper, the stop block 263 moves upward in the sleeve 260 and compresses the compression spring 264. At this time, the displacement sensor 265 monitors the displacement distance of the stop block 263 in real time and converts the detection data into an electronic control signal, which is transmitted to the proportional regulating valve 252 to adjust and control the air speed and air volume in the air inlet pipe 251, so that the cooling effect of the ventilation pipe 250 on the cutting blade 230 can be correspondingly enhanced as the cutting depth increases. During this process, the push rod 266 moves upward synchronously with the stop block 263. When the cutting depth is thick, the toggle block 2661 on the push rod 266 will move through the elastic bow plate 2111, causing the elastic bow plate 2111 to be squeezed and triggering the contact switch 2112. At this time, the cooler 211 will start to cool the air in the ventilation pipe 250. Thus, when the cutting blade 230 cuts too deep and needs to dissipate heat quickly, it can cool the circulating air by cooling it. With the increase of wind speed and air volume, the cooling intensity of the cutting blade 230 is greatly enhanced. The chips generated during the cutting process will fall into the chip trough 1001. The fixed air duct 430 will generate negative pressure suction in the chip discharge hole 1002 through the negative pressure suction nozzle 434, so that the chips in the chip trough 1001 can be sucked into the chip discharge hole 1002 and discharged downward. For the molten chips that are sintered with the chip trough 1001 at high temperature, the airflow continuously flowing in the fixed air duct 430 will drive the fan blade 432 to rotate. The fan blade 432 will drive the rotating rod 431 to rotate. The rotating rod 431 will drive the scraper 433 to rotate and scrape in the chip trough 1001, thereby effectively scraping and cleaning the molten chips to avoid sintering and accumulation.

[0056] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A plastic mold automatic cutting device, comprising a cutting table (100), a top plate (120) is fixedly connected to the upper end of the cutting table (100) through a support rod (110), a driving cylinder (130) is fixedly arranged in the center of the top plate (120), an installation plate (140) is axially slidably installed on the support rod (110), and the output end of the driving cylinder (130) is connected with the installation plate (140), characterized in that, A cutting mechanism (200) is provided at the bottom of the mounting plate (140). The cutting mechanism (200) includes a fixing frame (210) fixedly connected to the mounting plate (140). A cover (220) is fixedly provided inside the fixing frame (210). A cutting blade (230) is rotatably installed inside the cover (220). A driving assembly (240) for driving the cutting blade (230) to rotate is fixedly provided on the side wall of the fixing frame (210). A ventilation pipe (250) for blowing air to cool the cutting blade (230) is fixedly provided on the outer wall of the cover (220). A sleeve (260) is fixedly provided on one side of the cover (220). A pressure rod (261) is slidably provided through the sleeve (260). The bottom of the pressure rod (261) is fixedly connected to the cutting blade (230). 0) A pressure plate (262) with the bottom flush against the workpiece surface, the pressure plate (262) abuts against the workpiece surface and adjusts the cooling intensity of the air blowing in the ventilation pipe (250) according to the cutting depth. A chip removal groove (1001) is provided in the center of the cutting table (100). A rotating groove (1003) is provided around the chip removal groove (1001). A turntable (300) is rotatably installed in the rotating groove (1003). A material placement groove (310) is provided at the upper end of the turntable (300). A sliding clamp (320) is slidably installed on both sides of the material placement groove (310). An air passage mechanism (400) is provided at the bottom of the cutting table (100). The air passage mechanism (400) is used to drive the sliding clamp (320) to clamp the workpiece and simultaneously clean the chip in the chip removal groove (1001).

2. The automatic cutting equipment for plastic molds according to claim 1, characterized in that, The drive assembly (240) includes a housing (241) which is fixed to one side of the fixing frame (210). A drive motor (242) is fixed on the side wall of the housing (241). The output end of the drive motor (242) is connected to a cutting shaft (243) via a transmission belt (244). The cutting shaft (243) passes through the cover (220) and is connected to the cutting blade (230).

3. The automatic cutting equipment for plastic molds according to claim 1, characterized in that, The top end of the pressure rod (261) is fixedly provided with a stop block (263), the stop block (263) is slidably installed in the sleeve (260), a compression spring (264) is provided between the upper end of the stop block (263) and the sleeve (260), a displacement sensor (265) for monitoring the moving distance of the stop block (263) is provided at the top end of the sleeve (260), a push rod (266) is fixedly provided at the upper end of the stop block (263), the top end of the push rod (266) passes through the sleeve (260) and is fixedly provided with a lever (2661).

4. The automatic cutting equipment for plastic molds according to claim 3, characterized in that, A variable frequency fan (150) is fixedly mounted on one side of the mounting plate (140). The ventilation pipe (250) is connected to the air outlet of the variable frequency fan (150) through the air inlet pipe (251). A proportional regulating valve (252) is provided on the air inlet pipe (251). The displacement sensor (265) is communicatively connected to the proportional regulating valve. A cooler (211) for cooling the air inlet pipe (251) is fixedly mounted on one side of the fixing frame (210). An elastic bow plate (2111) is fixedly mounted on one side of the cooler (211). A contact switch (2112) for controlling the start and stop is also installed on the cooler (211). The elastic bow plate (2111) is located above the toggle block (2661) and directly opposite the contact switch (2112).

5. The automatic cutting equipment for plastic molds according to claim 1, characterized in that, A plurality of nozzles (253) are uniformly connected on the ventilation pipe (250), and the nozzles (253) are inclined so that the blowing direction is toward the root of the tooth groove of the cutting blade (230).

6. The automatic cutting equipment for plastic molds according to claim 1, characterized in that, The air circuit mechanism (400) includes a four-way rotary joint (410). Piston cylinders (420) are fixed at both ends of the bottom of the turntable (300). The left and right ends of the four-way rotary joint (410) are connected to the bottom of the piston cylinders (420) through air pipes. A fixed air duct (430) is fixed at the bottom of the cutting table (100). The top end of the four-way rotary joint (410) is rotatably sealed with the fixed air duct (430). The bottom end of the four-way rotary joint (410) is rotatably sealed with the suction pipe (440). An air pump (500) is provided on one side of the cutting table (100). The suction pipe (440) is connected to the output end of the air pump (500).

7. The automatic cutting equipment for plastic molds according to claim 6, characterized in that, The bottom of the cutting table (100) is fixed with an adjustment motor (160). The output end of the adjustment motor (160) drives the turntable (300) to rotate and adjust through the transmission component (161). The bottom of the chip trough (1001) is provided with a chip discharge hole (1002). The bottom of the rotating groove (1003) is provided with an arc-shaped groove (1004) for the piston cylinder (420) to rotate.

8. The automatic cutting equipment for plastic molds according to claim 7, characterized in that, The rotation adjustment angle range of the turntable (300) is 0-160°.

9. The automatic cutting equipment for plastic molds according to claim 7, characterized in that, A rotating rod (431) is coaxially rotatably installed inside the fixed air duct (430). The bottom end of the rotating rod (431) extends into the fixed air duct (430) and is fixedly connected to a fan blade (432). The top end of the rotating rod (431) extends into the chip trough (1001) and is evenly connected to a scraper (433). The bottom of the scraper (433) is attached to the chip trough (1001). A negative pressure suction nozzle (434) is evenly connected to the fixed air duct (430). The negative pressure suction nozzle (434) is connected to the corresponding chip discharge hole (1002).

10. An automatic cutting device for plastic molds according to claim 7, characterized in that, The turntable (300) is provided with a sliding groove (3001), and the sliding clamp (320) is adapted to slide and install in the sliding groove (3001). The bottom of the sliding groove (3001) is provided with a relief cavity (3002). A set of connecting rods (330) are symmetrically arranged in the relief cavity (3002). A piston rod (340) is slidably inserted through the center of the bottom of the relief cavity (3002). One end of the connecting rod (330) is rotatably engaged with the bottom of the corresponding sliding clamp (320), and the other end of the connecting rod (330) is rotatably engaged with the top of the piston rod (340). The bottom end of the piston rod (340) is adapted to slide with the corresponding piston cylinder (420). A return spring (341) is provided between the top end of the piston rod (340) and the bottom of the relief cavity (3002).

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