An automatic mould water quenching device and method

Abstract

The application provides an automatic mould water quenching device and method, and belongs to the technical field of heat treatment. The scheme comprises a receiving container, a motion system, a monitoring system and a control system. The receiving container is used for placing a mould. The motion system drives the receiving container to ascend and descend between a material receiving position above the liquid level of a quenching liquid and an original position below the liquid level. The monitoring system comprises a first sensor for detecting the material receiving position, a second sensor for detecting the placement of the mould, a third sensor for detecting the original position and a timer for timing. The control system automatically executes the following operations according to the sensor signals: after confirming that the mould is in place, driving the receiving container to descend to the original position for quenching; and after the quenching is completed, returning to the material receiving position for air cooling. The device realizes full automation of the quenching process, eliminates the need for repeated coordination between a crane operator and ground personnel, avoids manual timing errors and communication safety hazards, and liberates the crane for other operations, thereby greatly improving equipment utilization and production efficiency.

Description

Technical Field

[0001] This invention relates to the field of heat treatment technology, and in particular to an automatic plastic mold water quenching device and method. Background Technology

[0002] Currently, mold quenching mainly relies on the cooperation of crane operators and ground operators. The heated mold is hoisted into the bottom bracket of the water quenching tank, and a stopwatch is used to time and direct the hoisting. Cooling occurs in the air to allow the surface and core temperatures to balance. During this process, the crane must be in operation for the entire lifting operation, and temperature tests and re-immersion in water are repeated multiple times until the material reaches the set temperature. Simultaneously, the temperature and liquid level in the tank are manually controlled: if the temperature exceeds the limit, the cooling tower is activated for heat exchange; if the liquid level is low, liquid is manually added; and if the level is too high, a submersible pump is used for backflow. This operating method has many drawbacks.

[0003] Due to limited overhead crane resources, each crane can only lift one piece of material at a time, making it impossible to quench multiple pieces simultaneously, resulting in low production efficiency. The entire process relies on frequent coordination between crane operators and ground personnel, which can easily lead to safety hazards due to inadequate communication. Manual timing results in individual differences, affecting the consistency of quenching effects for the same batch of materials. The underwater support is not visible, making it easy for materials to tip over when placed. In addition, the poor accuracy of manual temperature and liquid level control often leads to water temperature fluctuations, mismatch between water replenishment and drainage, and overflow of the solution in the tank.

[0004] This shows that the current water quenching equipment has a low degree of automation and relies on human experience for judgment. Summary of the Invention

[0005] This invention provides an automatic plastic mold water quenching device and method, the purpose of which is to solve the problem of insufficient automation capability of existing quenching equipment.

[0006] To achieve the above objectives, in one aspect, embodiments of the present invention provide an automatic plastic mold water quenching device, comprising: Containers for holding plastic molds; The motion system drives the receiving container to move up and down between the receiving position above the quenching liquid surface and the origin position below the liquid surface. The monitoring system includes a first sensor for detecting whether the receiving container has reached the receiving position and outputting a first signal, a second sensor for detecting whether the plastic mold has been placed on the receiving container and outputting a second signal, a third sensor for detecting whether the receiving container has reached the origin position and outputting a third signal, and a timer for outputting a first timing signal and a second timing signal, wherein the first timing signal is the duration for which the receiving container stays at the origin position, and the second timing signal is the duration for which the receiving container stays at the receiving position; The control system is connected to the monitoring system and the motion system via signals and is used to execute the following processes: The control system receives the first signal to confirm that the receiving container has reached the receiving position, receives the second signal to confirm that the plastic mold has been placed, and controls the motion system to drive the receiving container to move downward to the origin position; Upon receiving the third signal, the receiving container is controlled to remain at the origin position for quenching based on the first timing signal. After quenching, the receiving container is controlled to return to the receiving position, and the dwell time is controlled based on the second timing signal after arriving at the receiving position.

[0007] Preferably, the motion system includes rotating shafts disposed on both sides above the surface of the quenching liquid, with two slings wound around each rotating shaft, one end of each sling being connected to the receiving container; The monitoring system also includes a displacement sensor for monitoring the height deviation between the two sides of the receiving container. The displacement sensor is located at the other end of the sling. The control system adjusts the movement of the two rotating shafts based on the height deviation so that the receiving container remains horizontal during the lifting and lowering process.

[0008] Preferably, the motion system further includes a drive mechanism, with the drive mechanism respectively provided at both ends of each rotating shaft, and the drive mechanism driving the rotating shaft to rotate; In the drive mechanisms at both ends of each of the rotating shafts, at least one drive mechanism drives the rotating shaft to rotate.

[0009] Preferably, it further includes a first water conveying structure and a second water conveying structure that are respectively connected to the control system signal; One end of the first water conveying structure is used to connect to the main tank that holds the quenching liquid, and the other end is used to connect to the external cooling tower. The second water conveying structure is used to connect an external cooling tower at one end and to connect a secondary tank that is connected to the main tank at the other end. The monitoring system also includes a temperature sensor for monitoring the temperature of the quenching fluid and a level gauge for monitoring the level of the quenching fluid. The temperature sensor and the level gauge are respectively connected to the control system.

[0010] Preferably, the monitoring system further includes a mold temperature sensor for monitoring the temperature at different points at the same height of the mold at the material receiving position.

[0011] Preferably, it also includes a plurality of stirring mechanisms for being disposed in the main tank. The stirring mechanism includes a stirrer, each of which can rotate about a vertical axis and stop at any position on the rotation path. The height of the stirrer is variable.

[0012] Preferably, the stirring mechanism includes a square tube column for rotatably disposed in the main tank, and the square tube column is provided with a rotation limiting component connected to the side wall of the main tank, the rotation limiting component restricting the position of the square tube column on the rotation path; The top of the square tube column is provided with a cantilever frame, the other end of the cantilever frame is provided with a guide wheel, and the square tube column is also provided with a ratchet mechanism and a rocker arm that drives the ratchet mechanism to rotate. The agitator is rotatably mounted on the lower middle part of the square tube column. A cable is connected to the agitator, which is wound around the guide wheel and connected to the ratchet shaft of the ratchet to adjust the height of the agitator.

[0013] On the other hand, this application also provides an automatic water quenching method for molding, comprising: The control system receives a first signal to confirm that the receiving container has reached the receiving position, receives a second signal to confirm that the plastic mold has been placed on the receiving container, and controls the motion system to drive the receiving container to move downward to the origin position; After receiving the third signal confirming that the receiving container has reached the origin position, the receiving container is controlled to stay at the origin position for quenching based on the duration recorded by the first timing signal. After quenching, the receiving container is controlled to return to the receiving position, and the dwell time is controlled based on the duration recorded by the second timing signal after reaching the receiving position.

[0014] Preferably, the displacement sensors acquire the height information of the slings on different rotating shafts, and the control system calculates the linear velocity of each sling and the height deviation of the receiving container. The control system uses a PID algorithm based on the linear velocity of the sling to compensate for the lower linear velocity of the sling, so that the height deviation of the receiving container approaches zero.

[0015] Preferably, the control system acquires the torque signals of two drive mechanisms on the same rotating shaft, and compensates the torque of the drive mechanism with smaller torque according to the PID algorithm to achieve the same torque.

[0016] The above-described solution of the present invention has the following beneficial effects: 1. The automatic plastic mold water quenching device and method of the present invention achieves fully automated operation of the quenching process through the coordinated work of the control system, motion system, and monitoring system. The device can automatically complete the lifting and lowering of the receiving container between the receiving position and the origin, as well as the timing of quenching and air cooling, without the need for repeated coordination between the crane operator and ground personnel, thus avoiding manual timing errors and communication safety hazards. The crane only needs to complete the hoisting and moving of the plastic mold, and can be freed up for other operations during the quenching process, greatly improving equipment utilization and production efficiency. At the same time, the receiving position is located above the liquid surface, making it easy for operators to observe the placement of the plastic mold and preventing it from tipping over due to underwater placement, further enhancing safety.

[0017] 2. In terms of motion control, the device adopts a redundant configuration with dual rotating shafts and dual drive mechanisms on each shaft. Combined with displacement sensors to monitor the height deviation between the two sides of the receiving container in real time, and using a PID algorithm to dynamically compensate for the sling speed and motor torque, it ensures that the receiving container remains level during lifting and lowering, preventing overturning. The dual drive mechanism on each shaft also enables redundant operation in case of unilateral failure and ensures consistent output torque from both motors. Furthermore, the design of the anchor chain and anchor chain wheel meshing transmission, pneumatic brakes, and guide wheels further enhances the reliability and stability of operation.

[0018] 3. The device also features automatic temperature and level control of the quenching fluid: Real-time monitoring via temperature sensors and level gauges, combined with the first water supply structure (replenishing cryogenic fluid from the external cooling tower) and the second water supply structure (discharging hot fluid overflowing into the auxiliary tank), automatically maintains the water temperature within the set range and keeps the liquid level stable, preventing fluctuations or overflows caused by manual operation. The main tank is equipped with a horizontally rotatable, height-adjustable agitator that can agitate the quenching fluid as needed to eliminate air bubbles on the mold surface and improve quenching uniformity. Simultaneously, a mold temperature sensor at the receiving point can collect the temperature at multiple points on the mold surface and calculate the highest and average values, providing data support for process monitoring and adjustment. The entire system allows for flexible preset underwater quenching and air cooling times and supports multiple repeated water ingress / outgress processes to adapt to different heat treatment process requirements for molds. Attached Figure Description

[0019] Figure 1 This is a top view of the device; Figure 2 It is a three-dimensional diagram of the device; Figure 3 It is a 3D view of the stirring mechanism; Figure 4 This is a side view of the stirring mechanism; Figure 5 This is a rear view of the stirring mechanism; Figure 6 yes Figure 4 A cross-sectional view along the AA direction; Figure 7 It is a picture Figure 5 Cross-sectional view along the BB direction; Figure 8 This is a flowchart of the control system controlling the receiving container; Figure 9 This is a flowchart for adjusting for container height deviations; Figure 10 This is a flowchart of the adjustment process for the two rotating shafts.

[0020] [Explanation of Labels in the Attached Image] 100. Container receiving device; 110. Guide wheel; 210. Rotating shaft; 211. Anchor chain wheel; 212. Split bearing; 213. Disc coupling; 213a. Brake disc; 214. Reducer; 220. Sling; 221. Counterweight; 230. Displacement sensor; 240. Drive mechanism; 250. Pneumatic brake; 310. First sensor; 350. Temperature sensor; 360. Liquid level gauge; 370. Mold temperature sensor; 400. First water conveying structure; 410. First water conveying pipeline; 411. Water conveying valve; 500. Second water supply structure; 510. Second water supply pipeline; 520. Drain valve; 530. Submersible pump; 600. Stirring mechanism; 610. Stirrer; 611. Base; 612. Pulley; 620. Square tube column; 621. Rotating seat; 630. Rotation limit assembly; 631. First connecting horizontal plate; 632. Second connecting horizontal plate; 633. Shaft pin; 634. Limiting hole; 635. Insertion hole; 640. Cantilever frame; 650. Guide wheel; 660. Ratchet mechanism; 661. Rocker arm; 662. Mounting seat; 663. Ratchet; 664. Pawl; 665. Winding wheel; 670. Cable; 800, main slot; 900, secondary slot. Detailed Implementation

[0021] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0022] like Figures 1-8 As shown, an embodiment of the present invention provides an automatic plastic mold water quenching device, including a main tank 800, a receiving container 100, a motion system, a monitoring system, and a control system. The main tank 800 is used to contain quenching fluid; in this embodiment, the quenching fluid is water. The receiving container 100 is used to hold the plastic mold. The motion system can drive the receiving container 100 to move up and down between a receiving position and a starting position. The receiving position is located above the surface of the quenching fluid, and the starting position is located below the surface of the quenching fluid. Quenching is performed when the plastic mold is immersed in the quenching fluid at the starting position.

[0023] The aforementioned monitoring system includes several sensors, specifically including a first sensor 310, a second sensor, a third sensor, and a timer.

[0024] The system includes a first sensor 310 that detects whether the receiving container 100 has reached the receiving position and outputs a first signal when it does. A second sensor detects whether the mold is placed on the receiving container 100 and outputs a second signal when the mold is placed on the receiving container 100. A third sensor detects whether the receiving container 100 has reached the origin position and outputs a third signal when it does. A timer outputs a first timing signal and a second timing signal. The first timing signal represents the duration the receiving container 100 remains at the origin position, and the second timing signal represents the duration the receiving container 100 remains at the receiving position. The timer stores the duration at the origin or the receiving position in a pre-input manner.

[0025] The control system is connected to the monitoring system and motion system signals, and the following process is performed: The control system receives a first signal to confirm that the receiving container 100 is in the receiving position. When the receiving container 100 is in the receiving position, the plastic mold is placed on the receiving container 100 by means of a crane or other means, triggering a second signal. The control system receives the second signal to confirm that the plastic mold has been placed on the receiving container 100, and controls the motion system to drive the receiving container 100 downward to the original position. When the receiving container 100 moves to the original position, a third signal is triggered. After receiving the third signal, the control system controls the receiving container 100 to stay at the original position for quenching based on the first timing signal. The time spent at the original position is the time pre-input by the first timing signal. After quenching, the receiving container 100 returns to the receiving position and stays at the receiving position for the time pre-input by the second timing signal. Air cooling is completed at the receiving position.

[0026] When the quenching process is performed once, the receiving container 100 returns to the receiving position and the mold is removed. The receiving container 100 then returns to its original position to standby.

[0027] When the quenching process is repeated at least once, the control system repeats the above process and after the mold is removed, the receiving container 100 returns to the original position for standby.

[0028] In this application, automated quenching is achieved through the coordinated design of the control system, motion system, and monitoring system, which does not rely on the coordination of crane operators and ground personnel, and enables standardized production, thereby improving the quenching quality.

[0029] In this application, the first sensor 310 and the third sensor are sensors capable of detecting whether the receiving container 100 has reached the corresponding position.

[0030] The second sensor is a sensor capable of determining whether a mold is present on the receiving container 100, such as a pressure sensor or a photoelectric sensor. When the second sensor is a pressure sensor, it is installed on the receiving container 100. The second sensor determines whether the mold is placed on the receiving container 100 by detecting whether the pressure between the receiving container 100 and the mold is greater than a preset pressure.

[0031] When the second sensor is a photoelectric sensor, the second sensor is set on the main tank 800 and slightly higher than the material receiving position. The second sensor can emit a light beam above the receiving container 100 at the material receiving position and determine whether there is a plastic mold above the receiving container 100 by the time the light beam returns.

[0032] Furthermore, the aforementioned motion system includes two rotating shafts 210, which are arranged in parallel and located above the quenching liquid surface, with two suspension cables 220 wound around each rotating shaft 210.

[0033] The monitoring system also includes displacement sensors 230 for detecting the height deviation between the two sides of the receiving container 100. One end of each sling 220 is connected to the receiving container 100, and the other end is connected to the displacement sensor 230. When one end of the sling 220 rises or falls, the other end rises or falls accordingly. By detecting the displacement of the end of the sling 220 not connected to the receiving container 100, the height deviation of the receiving container 100 on both sides of the rotating shaft 210 is indirectly obtained. The control system adjusts the movement speed of the two rotating shafts 210 based on a PID strategy using this height deviation, so that the height deviation approaches zero, thereby ensuring that the receiving container 100 remains horizontal during the lifting and lowering process.

[0034] Preferably, the displacement sensor 230 is a draw-wire encoder. The draw-wire encoder's wire is connected to the end of the sling 220 that is not connected to the receiving container 100. The sensor of the draw-wire encoder is installed in a fixed position. In this embodiment, the sensor of the draw-wire encoder is installed on the side wall of the main trough 800. The real-time length of the draw-wire encoder's wire is used to detect the height deviation of the receiving container 100. The preset total length of the draw-wire encoder's wire is used to determine whether the receiving container 100 has reached the preset distance to the receiving position. Specifically, an origin sensor is set at the origin position as the first sensor 310. When the receiving container 100 moves to the origin position, the origin sensor sends a third signal, and the receiving container 100 starts moving from the origin position. After the draw-wire encoder detects that the receiving container 100 has moved the preset distance, it can be determined that the receiving container 100 has reached the receiving position.

[0035] Preferably, an anchor chain wheel 211 is provided on each rotating shaft 210, and the sling 220 is made of anchor chain. The anchor chain and the anchor chain wheel 211 are meshed, ensuring that when the rotating shaft 210 rotates, the anchor chain and the anchor chain wheel 211 transmit power through the meshing of the toothed chain, which can effectively prevent relative slippage between the anchor chain and the rotating shaft 210 and avoid the occurrence of slippage.

[0036] Furthermore, in order to drive the rotating shaft 210 to rotate, the motion system also includes a drive mechanism 240. A drive mechanism 240 is provided at both ends of each rotating shaft 210, and the drive mechanisms 240 at both ends of the same rotating shaft 210 drive the rotating shaft 210 to rotate.

[0037] In this application, both the drive mechanism 240 and the rotating shaft 210 are mounted on a bracket above the main slot 800. Specifically, a bearing housing for a split bearing 212 (also known as a split bearing) is provided on the bracket, and the rotating shaft 210 is mounted on the bracket via the split bearing 212, enabling the bearing to rotate. The aforementioned drive mechanism 240 is provided on the bracket, and the drive mechanism 240 is connected to the rotating shaft 210 to drive the rotating shaft 210 to rotate.

[0038] Preferably, the drive mechanism 240 is a servo motor. The shaft end of the rotating shaft 210 is connected to a reducer 214 fixed on a bracket via a coupling. The other end of the reducer 214 is connected to the drive mechanism 240 via a disc coupling 213. When the drive mechanism 240 outputs power, it is transmitted sequentially through the coupling, reducer 214, and disc coupling 213 to the rotating shaft 210, causing the rotating shaft 210 to rotate. Adding the reducer 214 effectively increases the load torque and speed.

[0039] In this embodiment, the reducer 214 is a 90° planetary gear reducer with a speed ratio of 1:180.

[0040] In the aforementioned drive mechanisms 240 at both ends of each rotating shaft 210, at least one drive mechanism 240 drives the rotating shaft 210 to rotate. When two drive mechanisms 240 simultaneously drive the rotating shaft 210 to rotate, the control system collects the torque feedback signals of the two drive mechanisms 240, monitors the difference in output torque between the two motors in real time, and performs speed PID compensation on the drive mechanism 240 with lower torque, so as to achieve the same torque for the two drive mechanisms 240 on the same rotating shaft 210, and finally achieve the purpose of synchronous operation.

[0041] When only one drive mechanism 240 is driven on the same rotating shaft 210, the other drive mechanism 240 is in a follow-up state, rotating synchronously with the rotating shaft 210 but without outputting torque.

[0042] A pneumatic brake 250 is also fixed on the bracket. The pneumatic brake 250 is located at the disc coupling 213. It should be noted that the disc coupling 213 not only serves to connect and transmit power, but also has a circumferentially protruding brake disc 213a that cooperates with the pneumatic brake 250. When the receiving container 100 is stationary at the receiving position for air cooling or at the origin for quenching, the pneumatic brake 250 clamps the brake disc 213a, stopping the rotation of the rotating shaft 210, thereby maintaining the receiving container 100 at the designated position. When the receiving container 100 is being raised or lowered, the pneumatic brake 250 releases the brake disc 213a, without interfering with the rotation of the rotating shaft 210.

[0043] However, it should be noted that an upper limit sensor (not shown in the diagram) is also installed on the main trough 800. The upper limit sensor is located at a preset distance above the receiving position and is connected to the control system signal.

[0044] When either condition one or condition two is met, the control system controls the pneumatic brake 250 to clamp the brake disc 213a to prevent accidents. Condition one is: the height of the receiving container 100 reaches the upper limit position marked by the upper limit sensor. Condition two is: the height difference between the two sides obtained by the wire encoder exceeds the preset value.

[0045] Preferably, in this application, the receiving container 100 includes a rectangular frame, in which a plurality of support beams are arranged at intervals. The cross-section of the support beams is semi-circular, and the support beams are installed in the frame with the arc surface facing upward, so as to reduce the contact area between the support beams and the mold, optimize the quenching effect, and not affect the convection of the solution at the bottom of the mold.

[0046] Lifting lugs for connecting to sling 220 are also provided at the corners of the frame.

[0047] Guide wheels 110 are provided on the side of the frame. The guide wheels 110 are used to contact and slide with the inner wall of the main tank 800 to prevent the receiving container 100 from swaying during the lifting process.

[0048] Preferably, a counterweight 221 is provided at the end of the sling 220 that is not connected to the lifting lug, and the wire encoder is connected to the sling 220 through the counterweight 221.

[0049] This application also includes a first water conveying structure 400 and a second water conveying structure 500, which are respectively connected to the control system signal to realize automated control.

[0050] The aforementioned main tank 800 is connected to a secondary tank 900. The secondary tank 900 is used to hold quenching liquid at the same level as the liquid level in the main tank 800. An overflow port is provided at the top of the main tank 800, which is lower than the receiving position. The main tank 800 and the secondary tank 900 are connected by a pipe at the overflow port.

[0051] The aforementioned first water conveying structure 400 is connected at one end to the main tank 800 and at the other end to the external cooling tower. The second water conveying structure 500 is connected at one end to the auxiliary tank 900 and at the other end to the external cooling tower. With the connection between the first water conveying structure 400 and the second water conveying structure 500, the water can circulate among the main tank 800, the external cooling tower, and the auxiliary tank 900, thereby cooling the quenching fluid and maintaining the liquid level at a preset height.

[0052] Specifically, the first water supply structure 400 includes a first water supply pipeline 410 and a water supply valve 411 installed on the pipeline and connected to the control system signal. When cooling of the quenching liquid is required, the water supply valve 411 is opened, and the low-temperature quenching liquid in the peripheral cooling tower is sent into the main tank 800 to mix with the quenching liquid in the main tank 800, thereby lowering the temperature of the quenching liquid in the main tank 800. The second water supply structure 500 includes a second water supply pipeline 510, a drain valve 520 installed on the second pipeline and connected to the control system signal, and a submersible pump 530 connected to the control system signal. The submersible pump 530 is installed in the auxiliary tank 900. Although the low-temperature quenching liquid from the peripheral cooling tower entering the main tank 800 can lower the temperature of the quenching liquid in the main tank 800, it can also cause the liquid level in the main tank 800 to rise above the receiving position, affecting the air cooling effect of the mold. Therefore, when the liquid level in the main tank 800 rises to between the overflow hole and the receiving position, the quenching liquid in the main tank 800 is automatically discharged into the secondary tank 900 through the overflow port; at the same time, the control system activates the second water supply structure 500 to pump the quenching liquid in the secondary tank 900 into the external cooling tower to maintain the liquid level balance in the secondary tank 900.

[0053] The aforementioned monitoring system also includes a temperature sensor 350 and a level gauge 360, which are respectively connected to the control system signal. The temperature sensor 350 is installed in the main tank 800 to detect the temperature of the quenching liquid in the main tank 800, and the level gauge 360 ​​is installed in the main tank 800 to detect the liquid level of the quenching liquid in the main tank 800.

[0054] In this embodiment, the temperature sensor 350 is a rod-type thermometer. The rod-type thermometer can be set with an upper temperature limit and a lower temperature limit. When the real-time temperature of the quenching fluid reaches the upper or lower limit, it can transmit the signal to the control system. The level gauge 360 ​​is a radar-type level gauge. It can be set with an upper level and a lower level. When setting the lower level, it should ensure that the mold is still immersed in the quenching fluid when it is at its original position.

[0055] The aforementioned monitoring system also includes a mold temperature sensor 370, which is used to monitor the temperature at different locations at the same height of the mold that is air-cooled at the receiving point, and calculates and displays the highest temperature and average temperature of the highest mold based on the control system.

[0056] In this embodiment, the mold temperature sensor 370 is mounted on the oscillating motor. Driven by the oscillating motor, the mold temperature sensor 370 swings horizontally at the horizontal height of the material receiving position, thereby collecting the temperature of different points of the mold during air cooling.

[0057] Several stirring mechanisms 600 are also provided in the main tank 800. Each stirring mechanism 600 includes a stirrer 610, wherein each stirrer 610 can rotate horizontally about the vertical axis and stop at any position on the rotation path, and the height of the stirrer 610 can change.

[0058] The stirrer 610 agitates the quenching fluid to create a certain flow rate, preventing air bubbles from accumulating on the surface of the mold.

[0059] Specifically, the stirring mechanism 600 includes a square tube column 620, and a rotating seat 621 fixed to the bottom of the main tank 800 is provided at the bottom of the square tube column 620. The square tube column 620 and the rotating seat 621 are rotatably connected so that the square tube column 620 can rotate about the vertical axis.

[0060] A rotation limiting assembly 630 is also provided at the middle and upper part of the square tube column 620. The rotation limiting assembly 630 includes a first connecting horizontal plate 631 fixed to the inner wall of the main groove 800 and a second connecting horizontal plate 632 fixed to the square tube column 620. A shaft pin 633 is provided on the second connecting horizontal plate 632. The first connecting horizontal plate 631 is rotatably connected to the shaft pin 633, so that the second connecting horizontal plate 632 can rotate relative to the first connecting horizontal plate 631 about the shaft pin 633. A plurality of limiting holes 634 are provided on the first connecting horizontal plate 631, and an insertion hole 635 is provided on the second connecting horizontal plate 632. When the second connecting horizontal plate 632 rotates, the projection of the insertion hole 635 on the first connecting horizontal plate 631 is located on the line connecting the plurality of limiting holes 634. When a pin is inserted into the insertion hole 635, the pin is also inserted into one of the limiting holes 634, thereby stopping the second connecting horizontal plate 632 at any position on the rotation path.

[0061] Furthermore, a cantilever 640 is provided at the top of the square tube column 620, and a guide wheel 650 is provided at the end of the cantilever 640 away from the square tube column 620. A ratchet mechanism 660 and a rocker arm 661 that drives the ratchet mechanism 660's ratchet 663 to rotate are provided on the square tube column 620. The stirrer 610 is rotatably located in the lower middle part of the square tube column 620. A cable 670 is connected to the stirrer 610, and the other end of the cable 670 is wound around the guide wheel 650 and connected to the ratchet shaft of the ratchet 663. When the rocker arm 661 is rotated, it drives the ratchet 663 of the ratchet mechanism 660 to rotate, and the cable 670 is wound or unwound around the ratchet shaft, thereby pulling the stirrer 610.

[0062] Furthermore, the ratchet mechanism 660 also includes a mounting base 662, which is disposed at the top of the square tube column 620. The mounting base 662 consists of two parallel side plates, with the ratchet shaft of the ratchet 663 passing between the two side plates and rotatable relative to the side plates; the pawl 664 is fixed to one of the side plates. The aforementioned rocker arm 661 is fixed to the ratchet shaft. A winding wheel 665 is disposed above the ratchet 663, and the winding wheel 665 meshes with the ratchet 663 for transmission; the winding wheel 665 is rotatably disposed on the two side plates through its shaft. The ratchet 663 acts as the driving wheel, and the winding wheel 665 acts as the driven wheel; the two adopt a reduction gear transmission to reduce the rotational speed of the winding wheel 665 and increase its torque.

[0063] The mixer 610 is a waterproof mixer. A base 611 is provided at the end of the mixer 610 away from the blades. The base 611 includes two parallel triangular plates and a base plate connecting the triangular plates. A pulley 612 is provided on the side of the triangular plates away from the base plate. A square tube column 620 passes through the base plate and the pulley 612, and the pulley 612 slides in contact with the side of the square tube column 620.

[0064] When the cable 670 is pulled, it can drive the agitator 610 to move upward along the square tube column 620. When the cable 670 is released, the agitator 610 moves downward along the square tube column 620 under the action of gravity, thereby realizing the height adjustment of the agitator 610.

[0065] Normally, the height of the agitator 610 is adjusted before injecting the quenching fluid into the main tank 800. The height of the agitator 610 can be adjusted as needed during the quenching process.

[0066] In this application, drive mechanisms 240 are provided at both ends of each rotating shaft 210, which can realize the synchronous lifting or lowering of the sling 220 and achieve redundant configuration of the single-sided drive mechanism 240. When one drive mechanism 240 fails, the other drive mechanism 240 can still work independently.

[0067] The dual rotating shafts 210 effectively prevent the receiving container 100 from tipping over. The arrangement of the dual-shaft four-drive mechanism 240 reduces the difficulty of control. Only the rotation speed of the dual shafts needs to be adjusted to keep the receiving container 100 level during the lifting and lowering process.

[0068] This device can control the frequency and dwell time of the plastic mold by setting different parameters according to different processes. It does not rely on a crane. The crane only needs to lift the plastic mold onto the receiving container 100 and lift the material away after quenching. This frees up the crane during the quenching process and improves the efficiency of crane use.

[0069] During the quenching process, the mold is automatically quenched by the drive mechanism 240, eliminating the need for manual intervention. This avoids communication between the crane operator and process engineer at height and on the ground during the mold's movement, improving quenching efficiency and safety. Furthermore, the automated process helps improve the quenching effect and consistency.

[0070] Finally, the receiving position is located above the liquid surface, allowing the crane operator to better observe the placement of the mold during hoisting, making placement easier and safer.

[0071] like Figure 8 As shown, this application also provides an automatic water quenching method for plastic molds, which mainly includes the following steps: S100. The control system receives the first signal to confirm that the receiving container 100 has reached the receiving position, receives the second signal to confirm that the plastic mold has been placed on the receiving container 100, and controls the motion system to drive the receiving container 100 to move downward to the original position.

[0072] S200. After receiving the third signal confirming that the receiving container 100 has reached the origin position, the receiving container 100 is quenched at the origin position based on the duration recorded by the first timing signal. After the quenching is completed, the receiving container 100 returns to the receiving position, and the dwell time is controlled based on the duration recorded by the second timing signal after reaching the receiving position.

[0073] S300. Repeat steps S100 and S200 until the quenching process is completed. Use a crane to lift and move the plastic mold, and move the container 100 back to its original position.

[0074] like Figure 9 During the lifting and lowering process of the receiving container 100, the displacement sensor 230 acquires the height information of the slings 220 on different rotating shafts 210 and feeds the height information of each sling 220 back to the control system. The control system calculates the linear velocity of each sling 220 and the height difference between the two rotating shafts 210 of the receiving container 100 based on the height information. The control system uses a PID algorithm to compensate for the speed of the sling 220 with the lower linear velocity based on the linear velocity of each sling 220, so that the height difference of the receiving container 100 approaches zero, thereby keeping the receiving container 100 in a horizontal state during the lifting and lowering process.

[0075] like Figure 10As shown, during the lifting and lowering of the container 100, the control system also needs to acquire the working status of the two drive mechanisms 240 on the same rotating shaft 210. If the two drive mechanisms 240 on the same rotating shaft 210 are working normally, the torque signals of the two drive mechanisms 240 on the same rotating shaft 210 are acquired respectively, and the difference in output torque of the two drive mechanisms 240 is monitored in real time. Speed ​​PID compensation is performed on the drive mechanism 240 with lower torque to achieve the same torque of the two drive mechanisms 240 on the same rotating shaft 210, and finally achieve the purpose of synchronous operation.

[0076] If only one drive mechanism 240 is working normally on the same rotating shaft 210, the non-working drive mechanism 240 is shut down, and only the working drive mechanism 240 is used for driving. The difference in output torque between the two drive mechanisms 240 is not monitored.

[0077] The automated plastic molding water quenching method also includes controlling the quenching fluid level and maintaining a constant temperature. Specific methods for maintaining a constant temperature include: The control system detects the temperature of the quenching liquid in the main tank 800 through the temperature sensor 350. If the detected temperature of the quenching liquid is higher than the upper limit of the temperature, the control system sends an opening signal to the first water supply structure 400, the water supply valve 411 opens, and the low temperature quenching liquid in the peripheral cooling tower is pumped into the main tank 800 to mix with and cool down the quenching liquid in the main tank 800. As the temperature decreases, when the temperature of the quenching liquid in the main tank 800 reaches the lower limit, the control system sends a shutdown signal to the first water supply structure 400, and the external cooling tower stops injecting into the main tank 800.

[0078] Adding cryogenic quenching fluid to the main tank 800 will cause changes in the liquid level. Therefore, it is necessary to adjust the liquid level to maintain a constant level. Specifically, the methods for controlling the constant liquid level include: When the first water supply structure 400 is opened, the control system obtains the current liquid level height through the level gauge 360. If the current liquid level height is higher than the upper limit, the control system sends an opening signal to the second water supply structure 500, and the drain valve 520 and submersible pump 530 operate to pump the quenching liquid overflowing from the main tank 800 into the auxiliary tank 900 into the external cooling tower. When the current liquid level height reaches the lower limit, the control system sends a closing signal to the second water supply structure 500, and the drain valve 520 and submersible pump 530 stop operating.

[0079] The control system uses the mold temperature sensor 370 to collect temperature data from multiple measuring points at the same height in the air cooling area of ​​the receiving position, and calculates the maximum and average values ​​to monitor the mold temperature.

[0080] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An automatic plastic molding water quenching device, characterized in that, include: A receiving container (100) is used to hold the plastic mold; The motion system drives the receiving container (100) to move up and down between the receiving position above the quenching liquid surface and the origin position below the liquid surface. The monitoring system includes a first sensor (310) for detecting whether the receiving container (100) has reached the receiving position and outputting a first signal, a second sensor for detecting whether the mold is placed on the receiving container (100) and outputting a second signal, a third sensor for detecting whether the receiving container (100) has reached the origin position and outputting a third signal, and a timer for outputting a first timing signal and a second timing signal, wherein the first timing signal is the duration for which the receiving container (100) stays at the origin position, and the second timing signal is the duration for which the receiving container (100) stays at the receiving position; The control system is connected to the monitoring system and the motion system via signals and is used to execute the following processes: The control system receives the first signal to confirm that the receiving container (100) has reached the receiving position, receives the second signal to confirm that the plastic mold has been placed, and controls the motion system to drive the receiving container (100) to move downward to the origin position; After receiving the third signal, the receiving container (100) is controlled to stay at the origin position for quenching based on the first timing signal. After the quenching is completed, the receiving container (100) is controlled to return to the receiving position, and the dwell time is controlled based on the second timing signal after arriving at the receiving position.

2. The automatic plastic molding water quenching device according to claim 1, characterized in that: The motion system includes rotating shafts (210) arranged on both sides above the surface of the quenching liquid, and two slings (220) are wound around each rotating shaft (210), one end of the slings (220) being connected to the receiving container (100). The monitoring system also includes a displacement sensor (230) for monitoring the height deviation on both sides of the receiving container (100). The displacement sensor (230) is located at the other end of the sling (220). The control system adjusts the movement of the two rotating shafts (210) based on the height deviation so that the receiving container (100) remains horizontal during the lifting process.

3. The automatic plastic molding water quenching device according to claim 2, characterized in that: The motion system also includes a drive mechanism (240), which is provided at both ends of each rotating shaft (210). The drive mechanism (240) drives the rotating shaft (210) to rotate. At least one of the drive mechanisms (240) at both ends of each of the rotating shafts (210) drives the rotating shaft (210) to rotate.

4. The automatic plastic molding water quenching device according to claim 1, characterized in that: It also includes a first water conveying structure (400) and a second water conveying structure (500) that are respectively connected to the control system signal; One end of the first water conveying structure (400) is used to connect to the main tank (800) that holds the quenching liquid, and the other end is used to connect to the external cooling tower; The second water conveying structure (500) is used to connect an external cooling tower at one end and to connect a secondary tank (900) connected to the main tank (800) at the other end. The monitoring system also includes a temperature sensor (350) for monitoring the temperature of the quenching liquid and a level gauge (360) for monitoring the level of the quenching liquid. The temperature sensor (350) and the level gauge (360) are respectively connected to the control system.

5. The automatic plastic mold water quenching device according to claim 1, characterized in that: The monitoring system also includes a mold temperature sensor (370) for monitoring the temperature at different points at the same height of the mold at the material receiving position.

6. The automatic plastic mold water quenching device according to claim 4, characterized in that: It also includes a number of stirring mechanisms (600) for installation in the main tank (800), each stirring mechanism (600) including a stirrer (610), each of the stirrers (610) being able to rotate about a vertical axis and stop at any position on the rotation path, the height of the stirrer (610) being variable.

7. The automatic plastic molding water quenching device according to claim 6, characterized in that: The stirring mechanism (600) includes a square tube column (620) for rotatably disposed in the main tank (800). The square tube column (620) is provided with a rotation limiting component (630) connected to the side wall of the main tank (800). The rotation limiting component (630) restricts the position of the square tube column (620) on the rotation path. The top of the square tube column (620) is provided with a cantilever (640), and the other end of the cantilever (640) is provided with a guide wheel (650). The square tube column (620) is also provided with a ratchet mechanism (660) and a rocker arm (661) that drives the ratchet mechanism (660) to rotate. The stirrer (610) is rotatably mounted on the lower middle part of the square tube column (620). A cable (670) is connected to the stirrer (610). The cable (670) is wound around the guide wheel (650) and connected to the ratchet shaft of the ratchet (663) to adjust the height of the stirrer (610).

8. An automatic water quenching method for plastic molds, characterized in that, include: The control system receives a first signal to confirm that the receiving container (100) has reached the receiving position, receives a second signal to confirm that the plastic mold has been placed on the receiving container (100), and controls the motion system to drive the receiving container (100) to move downward to the original position; After receiving the third signal confirming that the receiving container (100) has reached the origin position, the receiving container (100) is controlled to stay at the origin position for quenching based on the duration recorded by the first timing signal. After the quenching is completed, the receiving container (100) is controlled to return to the receiving position, and the dwell time is controlled based on the duration recorded by the second timing signal after reaching the receiving position.

9. The automatic water quenching method for molding according to claim 8, characterized in that: The displacement sensor (230) acquires the height information of the slings (220) on different rotating shafts (210), and the control system calculates the linear velocity of each sling (220) and the height deviation of the receiving container (100). The control system uses a PID algorithm based on the linear velocity of the sling (220) to compensate for the lower linear velocity of the sling (220) so that the height deviation of the receiving container approaches zero.

10. The automatic water quenching method for molding according to claim 8, characterized in that: The control system acquires the torque signals of the two drive mechanisms (240) on the same rotating shaft (210), and compensates the torque of the drive mechanism (240) with smaller torque according to the PID algorithm to achieve the same torque.

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