Mold processing equipment with limiting function and process

Abstract

The application relates to the technical field of mold processing, and discloses a mold processing equipment with a limiting function and a process, which are used for processing automobile parts and comprise a hydraulic machine and a mold pressing mold. The hydraulic machine comprises a control system, a base, a workbench mounted on the base and a hydraulic mechanism mounted above the workbench and electrically connected with the control system. The mold pressing mold is detachably mounted between the workbench and the hydraulic mechanism. The center of the workbench is provided with a groove. An ejection device electrically connected with the control system is arranged in the groove. The ejection device comprises a jacking rod and is a jacking rod type ejection device. The ejection device further comprises a limiting switch, a sensor and a time delay component. The limiting switch is connected with the jacking rod and is used for linkage of the hydraulic mechanism, the mold and the jacking rod. The optimal process transformation mode with low cost, simple operation and strong universality can be realized on the basis of most existing mold processing equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mold processing, in particular to a mold processing equipment with limiting function and process. BACKGROUND

[0002] Thermosetting composite materials, such as automobile parts such as automobile bumpers, mainly utilize the characteristics of easy deformation under heat and pressure to be molded by mold processing equipment. The mold processing equipment commonly used includes a base, an operation table, a hydraulic mechanism and a mold pressing mold; the mold pressing mold includes an upper mold and a lower mold, the upper mold is driven by the hydraulic mechanism to move up and down, the lower mold is fixed on the operation table, the upper and lower molds are provided with heating elements, and the lower mold is also provided with a cavity for product forming; the operation table is provided with a telescopic ejector rod in the center, the ejector rod rises to pass through the lower mold to eject the formed part, facilitating the taking out of the formed part.

[0003] In specific use, after the mold pressing mold is closed and rises to a specified temperature, the hydraulic mechanism is started to drive the upper mold to move up, the mold is opened, the mold pressing material is placed on the cavity, and then the hydraulic mechanism is started to drive the upper mold to move down, the upper and lower molds are closed, the upper mold extrudes the upper part of the mold pressing material, so that the mold pressing material in the cavity is heated and pressed to become a molten state to fill the entire cavity, and after a certain time of solidification forming, the hydraulic mechanism drives the upper mold to move up, the upper and lower molds are opened, the ejector rod is raised by pressing the ejector rod rising button, the formed part is ejected by passing through the lower mold, the formed part is taken out, the mold pressing forming is completed, and after the ejector rod is retracted by pressing the ejector rod retraction button, the next mold pressing material is placed in the cavity for the next mold pressing forming.

[0004] However, during the mold pressing process of batch products, there are problems: the processing efficiency of batch products requires high speed, the feeding and discharging switching operation is relatively fast, the raised ejector rod is easy to be ignored, and the control logic of the ejector rod and the hydraulic mechanism is separately controlled and does not affect each other, so that after the mold pressing forming of the last mold pressing material is completed and the formed part is taken out, the retraction of the ejector rod is often forgotten by pressing the ejector rod retraction button, so that after the next mold pressing material is placed in the cavity, the hydraulic mechanism moves downward, the upper and lower molds are closed, and the upper mold is very easy to be damaged by being lifted to the top limit of the ejector rod.

[0005] In order to solve the above problems, the cost of replacing more intelligent and more precise equipment is very high, so the process modification on the existing equipment is more in line with the needs of the equipment users. The existing modification mainly focuses on the automatic lifting and returning of the ejector rod at a fixed time. In this case, due to different molding materials and different molding molds, the stroke of the hydraulic mechanism moving downward is also different. In the case of continuous feeding, the fixed timing time is not universal, so the timing time is set to be relatively long to improve the universality. However, the lifting and returning time of the ejector rod is too long, the batch molding production time is increased, and the processing efficiency is further reduced. If a more precise device is added to make the hydraulic mechanism and the ejector rod work together, the modification is difficult, the cost is high, and it is time-consuming and laborious. Therefore, it is urgent to modify the mold processing equipment, which has low modification cost, simple process, and can realize the optimal modification on the basis of the existing mold processing equipment. SUMMARY

[0006] The present application aims to provide a mold processing equipment with limiting function and process, which solves the technical problems of high cost, great difficulty and non-universality of the existing equipment modification of the association mode of the ejector rod and the hydraulic mechanism.

[0007] The basic scheme provided by the present application is a mold processing equipment with limiting function, which is used for automobile part processing and includes a hydraulic machine and a molding mold. The hydraulic machine includes a control system, a base, a workbench mounted on the base, and a hydraulic mechanism mounted above the workbench and electrically connected with the control system. The molding mold is detachably mounted between the workbench and the hydraulic mechanism. The center of the workbench is provided with a groove, and the groove is provided with an ejection device electrically connected with the control system. The ejection device includes an ejector rod, which is a ejector rod type ejection device. The ejection device further includes a limit switch, a sensor and a delay component. The limit switch is connected with the ejector rod and is used for linkage control of the hydraulic mechanism, the molding mold and the ejector rod.

[0008] The working principle and advantages of the present application are that the molding mold is detachably mounted between the workbench and the hydraulic mechanism, which can realize the optimal process modification mode with low cost, simple operation and strong universality on the basis of most existing mold processing equipment, and solve the technical problems of high cost, great difficulty and non-universality of the existing equipment modification of the association mode of the ejector rod and the hydraulic mechanism. The limit switch, the sensor and the delay component are added to the ejection device, the independent control mode of the ejection device and the hydraulic mechanism in the prior art is replaced by the associated control, and the whole equipment control system is more safe and reliable.

[0009] Specifically, the hydraulic mechanism and the ejector rod of the ejector device, the limit switch, the sensor, and the delay assembly are electrically connected with the control system, and the related delay relay, time relay, inductor, contactor and other electrical components are electrically connected to realize circuit transformation, so that the position signal of the ejector rod can be sent to the control system through the limit switch, the control system controls the operation of the hydraulic mechanism, and the sensor signal is used to control the delay assembly, and the delay assembly signal is combined with the hydraulic mechanism signal to control the ejector rod, realizing the linkage control of the hydraulic mechanism, the mold pressing die and the ejector rod. During the batch pressing process, the position of the ejector rod can control the hydraulic mechanism, avoid the ejector rod being in an improper position, and the hydraulic mechanism being unable to operate, resulting in the damage of the mold.

[0010] Further, the limit switch is installed at the lower limit position of the auxiliary rod which is parallel to the ejector rod and located outside the piston cylinder, for transmitting the signal that the ejector rod reaches the lower limit position to the control system, and the control system outputs the hydraulic mechanism lower opening signal, otherwise, the signal that the ejector rod does not reach the lower limit position is transmitted to the control system, and the control system outputs the hydraulic mechanism lower closing signal.

[0011] Beneficial effect: the limit switch is used to realize the linkage of the ejector rod and the hydraulic mechanism, so that the hydraulic mechanism can only move downward when the ejector rod is at the lower limit position, avoiding the ejector rod not being retracted, the hydraulic mechanism moving downward, the upper and lower molds being closed, and the ejector rod at the upper limit position being pushed to the mold pressing die, resulting in the damage of the mold pressing die.

[0012] Further, the sensor is installed on the workbench, 8 cm away from the groove; for transmitting the detected mold pressing die information to the control system, and the control system outputs the signal of the delay assembly adjusting the setting time.

[0013] Beneficial effect: due to the difference of the mold pressing material and the mold pressing die, the difficulty and time consumption of taking out the formed part are different, the sensor is used to realize the linkage with the delay assembly through the control system, and further realize the linkage with the hydraulic mechanism and the ejector rod, improving the universality and processing efficiency of the equipment; setting a reasonable position of the sensor can meet the test of various dies, improve the universality, and avoid the adjustment of the sensor position caused by the difference of the measured dies.

[0014] Further, the mold pressing die information includes the weight and size of the mold pressing die.

[0015] Beneficial effect: the different mold pressing dies are distinguished by the weight and size of the dies, which is simpler and easier to realize.

[0016] Further, the control system comprises a switch cabinet; the time delay component comprises a time delay switch I installed in the switch cabinet; the time delay switch I is used for receiving a signal that the ejector rod reaches the upper limit position, and sending a signal to the control system after a set time, so as to control the ejector rod to descend.

[0017] Beneficial effects: The time delay time is set for the retreat of the ejector rod, so that the retreat of the ejector rod is automatically performed when the operator forgets to press the ejector rod retreat button or the ejector rod retreat button is not pressed for a long time, and the processing efficiency is improved.

[0018] Further, the time delay component further comprises a time delay switch II installed in the switch cabinet, and the time delay switch II is installed at a position most beneficial to the circuit layout; the time delay switch II is used for receiving a signal that the hydraulic mechanism of the control system rises, and sending a signal to the control system after a set time, so as to control the ejector rod to rise.

[0019] Beneficial effects: The time delay time is set for the rise of the ejector rod, so that the rise of the ejector rod is automatically performed when the operator forgets to press the ejector rod rise button or the ejector rod rise button is not pressed for a long time, and the processing efficiency is improved; and the time delay switch I is reasonably arranged, so that the overall layout meets the requirements of the electrical layout.

[0020] The present application is based on a mold processing equipment with a limiting function, and further provides a mold processing technology with a limiting function, which solves the technical problems of high cost, great difficulty and non-universality in the association mode of the existing equipment modification ejector rod and hydraulic mechanism.

[0021] The method comprises the following steps:

[0022] In step S1, the upper die of the mold pressing die is fixed on the hydraulic mechanism, and the lower die is fixed on the workbench; the sensor sends the detected mold pressing die information to the control system, the control system sends a signal for adjusting the set time of the time delay switch I, and the set time of the time delay switch I is T1, that is, the time between the time when the ejector rod reaches the upper limit position and the time when the ejector rod starts to retreat.

[0023] In step S2, when the ejector rod is not at the lower limit position, the limit switch is triggered to send a signal that the ejector rod is not at the lower limit position to the control system, the control system outputs a signal for moving the hydraulic mechanism downward to be closed, the ejector rod is controlled to the lower limit position, the limit switch is triggered to send a signal that the ejector rod reaches the lower limit position to the control system, and the control system outputs a signal for moving the hydraulic mechanism downward to be opened.

[0024] In step S3, after the mold pressing die is heated to a specified temperature, the mold pressing material is placed on the cavity, the hydraulic mechanism is controlled to move the upper die downward, the upper die and the lower die are closed, the upper die extrudes the upper part of the mold pressing material, and the mold pressing material in the cavity is heated and pressed to become a molten state and fill the entire cavity.

[0025] Step S4, after curing and forming for a specified high-temperature holding time, the upper mold is moved upward by a manual or automatic control hydraulic mechanism, the upper and lower molds are opened, the ejector rod is raised by pressing the ejector rod raising button, the molded part is ejected through the lower mold, and the molded part is removed; when the ejector rod is raised, a limit switch sends a signal that the ejector rod is not in the lower limit position to the control system, and the control system outputs a hydraulic mechanism closing signal; when the ejector rod is raised to the upper limit position, a delay switch starts timing for a time T1;

[0026] Step S5, the ejector rod is retracted by pressing the ejector rod retraction button within the time T1, the next mold pressing material is put into the cavity, when the ejector rod reaches the lower limit position, a limit switch sends a signal that the ejector rod reaches the lower limit position to the control system, and the control system outputs a hydraulic mechanism opening signal to control the hydraulic mechanism to move the upper mold downward for the next mold pressing and forming;

[0027] If the ejector rod retraction button is not pressed within the time T1, the control system sends an ejector rod retraction signal to control the automatic retraction of the ejector rod.

[0028] Beneficial effects: The linkage of the ejector rod and the hydraulic mechanism is realized, the position signal of the ejector rod is sent to the control system through the limit switch, the control system controls the operation of the hydraulic mechanism, the sensor signal is used to distinguish different mold pressing molds to control the delay component to set different delay times, the automatic raising and retraction of the ejector rod within a certain delay time is controlled according to the position of the hydraulic mechanism, the linkage of the ejector rod, the limit switch, the sensor, the delay component and the hydraulic mechanism is realized, the processing efficiency and production safety are improved, and the mold damage rate is reduced.

[0029] Further, the following steps further include that step S1, a delay switch two sets a delay time t1, that is, the time between the upward movement of the hydraulic mechanism and the start of the upward movement of the ejector rod;

[0030] Step S4, when the hydraulic mechanism starts to move upward, the delay component starts timing for a time t1;

[0031] Step S5, the ejector rod is raised by pressing the ejector rod raising button within the time t1;

[0032] If the ejector rod raising button is not pressed within the time t1, the control system sends an ejector rod raising signal to control the automatic raising of the ejector rod.

[0033] Beneficial effects: A delay time is set for the raising of the ejector rod, the automatic raising of the ejector rod is realized when the operator forgets to press the ejector rod raising button or does not press the ejector rod raising button for a long time, and the processing efficiency is improved.

[0034] Further, in step S1, the molding die is replaced with another molding die, the height of the upper limit of the ejector rod is adjusted, the sensor sends the detected information of the different molding dies to the control system, and the control system sends a signal to adjust the set time of delay switch one and delay switch two. The set time of delay switch one is T2, which is the time between when the ejector rod rises to the upper limit and when the ejector rod begins to retract; the set time of delay switch two is t2, which is the time between when the hydraulic mechanism begins to move upward and when the ejector rod begins to rise.

[0035] Beneficial effects: It makes the automatic rise and fall time setting of the ejector pin more adaptable to different molding dies, the time setting more precise, and improves processing efficiency. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a mold processing equipment with a limiting function provided in an embodiment of the present invention.

[0037] Figure 2 This is a top view of a mold processing equipment worktable with a limiting function provided in an embodiment of the present invention.

[0038] Figure 3 This is a flowchart of a mold processing technology with a limiting function provided in an embodiment of the present invention. Detailed Implementation

[0039] The following detailed explanation illustrates the specific implementation methods:

[0040] The markings in the accompanying drawings include: hydraulic press 1, molding die 2, upper die 21, lower die 22, cavity 23, control system 11, operating table 111, switch cabinet 112, base 12, worktable 13, groove 131, hydraulic mechanism 14, ejection device 3, ejector rod 31, limit switch 32, sensor 33, delay component 34, delay switch one 35, delay switch two 36.

[0041] The implementation examples are basically as follows Figure 1 As shown: A mold processing equipment with a limiting function, used for processing automotive parts, includes a hydraulic press 1 and a molding die 2; the hydraulic press 1 includes a control system 11, a base 12, a worktable 13 mounted on the base, and a hydraulic mechanism 14 mounted above the worktable and electrically connected to the control system; the molding die 2 is detachably mounted between the hydraulic mechanism 14 and the worktable 13; a groove 131 is provided in the center of the worktable 13; an ejector device 3 electrically connected to the control system is provided in the groove 131; the ejector device 3 includes an ejector rod 31, which is an ejector rod type ejector device; the ejector device 3 also includes a limit switch 32, a sensor 33, and a delay component 34, for the linkage of the hydraulic mechanism, the molding die, and the ejector rod.

[0042] Specifically, the hydraulic machine adopts the common four-column hydraulic machine in the prior art, and is used in cooperation with the independent mold pressing mold 2 to perform mold pressing forming operation. The mold commonly used for mold pressing thermosetting composite material includes an upper mold 21 and a lower mold 22; in use, the upper mold 21 is fixed on the hydraulic mechanism; the lower mold 22 is fixed on the workbench; the upper and lower molds are provided with heating assemblies; a cavity 23 is fixedly arranged above the lower mold 22; because the mold-pressed thermosetting composite material has different shape size structure characteristics, the mold pressing mold 2 is different, and the hydraulic machine 1 and the mold pressing mold 2 are used in a detachable cooperation mode, so that different mold pressing molds can be replaced on the hydraulic machine, and the overall device has better universality. For example, the mold for producing automobile guard plates is different because the length, width, height and cavity shape of the guard plate are different, and the height and time of being pushed out are also different when the forming is taken out.

[0043] The ejection device 3 adopts a common ejector rod type ejection device, the ejector rod 31 is installed in the workbench groove 131 in a piston type structure. The control system 11 includes an operation table 111 and a switch cabinet 112, the operation table 111 is provided with operation buttons, including a total switch, a motor start button, a motor stop button, an ejector rod lifting button, an ejector rod retreating button, an emergency stop button, a manual automatic button, a main cylinder pressing button and a main cylinder return button, wherein the main cylinder pressing button controls the downward movement of the hydraulic mechanism, and the main cylinder return button controls the upward movement of the hydraulic mechanism. The ejector rod 31 is controlled to ascend and retreat by the buttons, and is lifted to the upward limit position to eject the formed part, and is retreated to the downward limit position to wait for the next lifting.

[0044] The groove 131 and the ejector rod 31 are both cylindrical, the groove 131 and the ejector rod 31 are matched in size, the diameter of the groove 131 is greater than the diameter of the circular cross section of the ejector rod 31, so that the ejector rod 31 can smoothly stretch and retract, and the diameter difference gap between the groove 131 and the ejector rod 31 meets the installation space requirement of the limit switch 32.

[0045] In order to solve the problem that the ejection device 2 and the hydraulic mechanism 14 do not operate in linkage, the ejector rod 31 is in an improper position, and the mold pressing mold 2 is pushed by the ejector rod 31 to cause damage to the mold pressing mold 2, the ejector rod 31 is set to an automatic lifting and retreating mode, and the problem of lack of universality is solved.

[0046] Therefore, the ejection device 3 further includes a limit switch 32, a sensor 33 and a delay assembly 34, which are used for linkage control of the hydraulic mechanism 14, the mold pressing mold 2 and the ejector rod 31.

[0047] Specifically, the limit switch 32 is installed at the lower limit position of the auxiliary rod which is parallel to the ejector rod 31 and outside the piston cylinder, for sending the signal of the ejector rod reaching the lower limit position to the control system, and the control system outputs the open signal of the hydraulic mechanism moving downward, otherwise, the control system outputs the close signal of the hydraulic mechanism moving downward.

[0048] As shown in Figure 2 the limit switch 32 is a common limit switch, which reduces the difficulty of transformation, is easy to install, and the size meets the gap space of the recess 131 and the reserved parallel auxiliary rod of the ejector rod 31. The wiring passes through the linear slot on the workbench for fixing the die pressing mold, which meets the requirements of easy installation on the existing mold processing equipment and simple process transformation. At the same time, the limit switch 32 is added to link the ejector rod and the hydraulic mechanism, which can realize optimal transformation on the basis of the existing equipment and meet the safety production requirements.

[0049] The sensor 33 is installed on the workbench, in the workbench or the linear slot for fixing the die pressing mold, which is 8 cm away from the recess, and meets the requirements of testing various molds. The sensor position needs to be adjusted according to the change of the mold to avoid inappropriate position. The sensor is used to send the detected die pressing mold information to the control system, and the control system outputs the signal of adjusting the setting time of the delay switch. Because different thermosetting composites are pressed, the die pressing molds are different, and the weight or size is different, so the die pressing mold information includes the weight and size of the die pressing mold. When the lower die or the whole die pressing mold is fixed and installed on the workbench, the size or weight of the die pressing mold can be detected, and the size or weight signal is sent to the control system. The control system controls the delay component to set the delay time. Different molds have different weights and sizes, and the set delay time is also different.

[0050] The delay component 34 includes a delay switch one 35 installed in the switch cabinet, which is used to receive the signal of the ejector rod reaching the upper limit position, send the signal to the control system after reaching the set time, and control the ejector rod to descend. In the manual mode, after the ejector rod ejects the formed part, the operator needs to take out the formed part, put the material, and perform other operations. After the operations are completed, the ejector rod return button is pressed to execute the ejector rod return, which prolongs the overall processing time. If the ejector rod return button is forgotten, the operator finds that the hydraulic mechanism cannot be operated at this time, and the ejector rod has not been returned. The ejector rod return button is pressed to execute the ejector rod return, which also prolongs the overall processing time. Therefore, the delay component is used to set the time, and the ejector rod is automatically returned after a certain time, which not only locks the hydraulic mechanism moving downward through the ejector rod not being returned, reduces the damage rate of the mold, and improves the safety of the personnel, but also realizes the automatic return of the ejector rod through the added delay component, which can further ensure that the ejector rod is returned in time.

[0051] Thus, the mold processing device with a limiting function provided by the embodiment links the hydraulic mechanism, the mold pressing mold and the ejector rod of the ejector device, and provides a stable, safe and efficient processing technology.

[0052] Specifically, as shown in the figure, Figure 3 includes the following steps:

[0053] Step S1, the upper die of the mold pressing mold is fixed on the hydraulic mechanism, and the lower die is fixed on the workbench; in actual use, it is necessary to ensure that the installation position of the mold pressing mold meets the requirements, the ejector rod can smoothly pass through the lower die to realize the ejection of the formed part, and the normal operation of the whole device is ensured. After the mold pressing mold is installed, the device is started, the sensor sends the mold pressing mold information detected by the sensor to the control system, the control system sends a signal to adjust the set time of the time delay switch, and the set time of the time delay switch is T1, that is, the time between the start of the hydraulic mechanism to move upward and the start of the ejector rod to retreat; in the embodiment, T1 is set to 20s.

[0054] Step S2, when the ejector rod is not in the lower limit position, the limit switch is triggered to send a signal that the ejector rod is not in the lower limit position to the control system, and the control system outputs a lower moving closing signal of the hydraulic mechanism; at this time, the button of the operation table is pressed, and the hydraulic mechanism cannot move downward. The control ejector rod to the lower limit position, and the limit switch is triggered to send a signal that the ejector rod reaches the lower limit position to the control system, and the control system outputs a lower moving opening signal of the hydraulic mechanism; only when the ejector rod retreats to the lower limit position, the button of the operation table is pressed, and the hydraulic mechanism can move downward, which ensures that the mold is not damaged by the ejector rod and ensures the safety of the workers, avoiding that someone is cleaning the workbench and someone else misoperates the hydraulic mechanism to move downward, causing personal injury.

[0055] Step S3, the operator places the mold pressing material on the cavity, presses the button of the operation table, controls the hydraulic mechanism to drive the upper die to move downward, the downward stroke is set to a certain distance, the upper and lower dies are closed, the upper die extrudes the upper part of the mold pressing material, so that the mold pressing material in the cavity is heated and pressed to become a molten state and fill the entire cavity.

[0056] Step S4, after curing and forming for a specified high-temperature pressure holding time, the indicator light is on, the operator presses the button to control the hydraulic mechanism to drive the upper die to move upward, the upper and lower dies are opened, the ejector rod is raised by pressing the ejector rod raising button to pass through the lower die to eject the formed part, and the formed part is taken off; the operator presses the button of the ejector rod to raise, the limit switch is triggered to send a signal that the ejector rod is not in the lower limit position to the control system, and the control system outputs a lower moving closing signal of the hydraulic mechanism; the hydraulic mechanism drives the upper die to move upward, and the set time T1 of the time delay switch starts timing;

[0057] Step S5, the operator T1 time press the ejector rod button, the ejector rod starts to return, the next die pressing material is put into the cavity; the ejector rod reaches the lower limit position, triggers the limit switch to send the ejector rod to the lower limit position signal to the control system, the control system outputs the hydraulic mechanism opening signal, controls the hydraulic mechanism to drive the upper die to move down for the next die pressing forming;

[0058] If the operator unloads slowly, spends a long time, forgets to return the ejector rod, T1 time does not press the ejector rod button, reaches T1 time, the control system sends the ejector rod return signal, controls the ejector rod to automatically return. Avoid the waiting time in the operation process switching, improve the processing efficiency.

[0059] According to the different die pressing thermosetting composite materials, the die pressing mold is different, the operator takes out the forming piece and spends different time, therefore, the delay time of the delay switch is adjusted, so that the ejector rod return time is suitable for more types of die pressing of thermosetting composite materials.

[0060] In step S1, the die pressing mold is replaced with another die pressing mold, the height of the ejector rod upper limit position is adjusted, the sensor sends the different die pressing mold information detected by the sensor to the control system, the control system sends the signal adjusting the delay switch one set time, the delay switch one set time is T2, that is, the time between the ejector rod rising to the upper limit position and the ejector rod starting to return. In this embodiment, T2 is set to 30s, another die pressing mold is heavier, the material handled is complex, and the material taking time is long, so the operation process time is appropriately prolonged to ensure sufficient time for material taking.

[0061] Example two

[0062] Different from example one, the delay assembly further includes a delay switch two installed in the switch cabinet, which is installed in the most favorable position of the circuit layout to meet the electrical equipment layout specification and safety requirements; the delay switch two is used for receiving the hydraulic mechanism rising signal of the control system, sending a signal to the control system after reaching the set time, and controlling the ejector rod to rise. In the manual mode of the mold processing equipment, the hydraulic mechanism rises, and the ejector rod can be controlled to rise according to the set time, which can improve the processing efficiency to some extent, make up for the time consumed by waiting for the hydraulic mechanism to rise, and effectively shorten the processing time.

[0063] In the processing process, step S1, the delay switch two sets the delay time t1, that is, the time between the hydraulic mechanism moving up and the ejector rod starting to rise; step S4, when the hydraulic mechanism starts to move up, the delay assembly starts to count the time t1; step S5, press the ejector rod rising button within t1 time, the ejector rod starts to rise; t1 time does not press the ejector rod rising button, reaches t1 time, the control system sends the ejector rod rising signal, controls the ejector rod to automatically rise. In this embodiment, t1 is set to 15s.

[0064] In step S1, the die mold is replaced with another die mold, the sensor sends the different die mold information detected to the control system, and the control system sends a signal to adjust the set time of the second delay switch, and the set time of the second delay switch is t2, that is, the time between the start of the hydraulic mechanism moving up and the start of the ejector rod rising. In this embodiment, t2 is set to 20s.

[0065] The delay assembly includes a plurality of delay switches, and different delay timing requirements are completed at different positions of the access circuit.

[0066] In summary, on the basis of the existing mold processing equipment, a small number of commonly used limit switches, sensors, delay assemblies and related contactors are added, and after circuit modification, the technical problems of high cost, great difficulty and lack of universality in the association mode of the existing equipment modification ejector rod and hydraulic mechanism are solved, the modification cost is low, the process is simple, and the optimal modification is realized.

[0067] Specifically, on the original equipment, the position signal of the ejector rod is sent to the control system by using the newly added limit switch, the operation of the hydraulic mechanism is controlled by the control system, and the linkage of the ejector rod and the hydraulic mechanism is realized; the information signal of the die mold is sent to the control system by using the newly added sensor, and the position signal of the hydraulic mechanism received by the control system after the time adjustment of the delay assembly is used to control the ejector rod together, realizing the linkage of the die mold and the hydraulic mechanism and the ejector rod, realizing the automatic rising and returning of the ejector rod after timeout, improving the processing efficiency, further improving the safety, ensuring that the position of the ejector rod can control the hydraulic mechanism during batch die pressing, avoiding the ejector rod being in an improper position and being unable to operate and limit the hydraulic mechanism, leading to the damage of the die mold by the hydraulic mechanism.

[0068] The above is only an embodiment of the present application, and the specific structure and characteristics of the scheme are not described in detail, and the ordinary technical personnel in the art know all the ordinary technical knowledge in the art before the application date or the priority date, can know all the prior art in the field, and have the ability to apply conventional experimental means before that date, and the ordinary technical personnel in the art can improve and implement the scheme under the guidance of the present application, and some typical known structures or known methods should not be an obstacle for the ordinary technical personnel in the art to implement the present application. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should be considered as the protection scope of the present application, and these will not affect the effect and practicality of the patent.

Claims

1. A mold processing equipment with a limiting function, characterized in that, Used for processing automotive parts; including a hydraulic press and a molding die; the hydraulic press includes a control system, a base, a worktable mounted on the base, and a hydraulic mechanism mounted above the worktable and electrically connected to the control system; the molding die is detachably mounted between the worktable and the hydraulic mechanism; the worktable has a groove at its center; an ejector device electrically connected to the control system is disposed in the groove; the ejector device includes an ejector rod, and is an ejector rod type ejector device; the ejector device also includes a limit switch, a sensor, and a delay component; the limit switch is connected to the ejector rod and is used for the linkage control of the hydraulic mechanism, the molding die, and the ejector rod; The position signal of the push rod can be sent to the control system through the limit switch. The control system controls the operation of the hydraulic mechanism and at the same time uses the sensor signal to control the delay component. The signal of the delay component, combined with the signal of the hydraulic mechanism, controls the push rod simultaneously. The limit switch is installed at the downward limit position of the auxiliary rod that runs parallel to the push rod and is located outside the piston cylinder. It is used to transmit the signal that the push rod has reached the downward limit position to the control system, and the control system outputs a signal that the hydraulic mechanism moves down to open. Otherwise, it transmits the signal that the push rod has not reached the downward limit position to the control system, and the control system outputs a signal that the hydraulic mechanism moves down to close. The sensor is used to transmit the detected molding die information to the control system, and the control system outputs a signal to adjust the set time of the delay component. The molding die information includes the molding die weight and dimensions.

2. The mold processing apparatus having a limiting function according to claim 1, wherein The sensor is mounted on the workbench, 8 cm away from the groove.

3. The mold processing apparatus having a limiting function according to claim 1, wherein The control system includes a switch cabinet; the delay component includes a delay switch installed in the switch cabinet; the delay switch is used to receive a signal that the push rod reaches the upper limit position, and after a set time, it sends a signal to the control system to control the push rod to descend.

4. The mold processing apparatus having a limiting function according to claim 3, wherein The delay component also includes a second delay switch installed in the switch cabinet, which is installed in the same position as the first delay switch according to the most favorable circuit layout. The second delay switch is used to receive the lifting signal of the hydraulic mechanism of the control system, and after the set time is reached, it sends a signal to the control system to control the lifting of the top rod.

5. A mold processing method with a limiting function, using the mold processing apparatus with a limiting function according to any one of claims 1 to 4, characterized by, Includes the following steps: Step S1: Fix the upper mold of the molding die on the hydraulic mechanism and the lower mold on the worktable; The sensor sends the detected molding die information to the control system, and the control system sends a signal to adjust the delay switch to a set time. The delay switch set time is T1, which is the time between when the ejector reaches the upper limit and when the ejector starts to retract. Step S2: When the push rod is not at the downward limit, the limit switch is triggered to send a signal that the push rod is not at the downward limit to the control system, and the control system outputs a signal that the hydraulic mechanism moves down to close; when the push rod is controlled to the downward limit, the limit switch is triggered to send a signal that the push rod has reached the downward limit to the control system, and the control system outputs a signal that the hydraulic mechanism moves down to open. Step S3: After the molding die is heated to the specified temperature, the molding material is placed on the cavity. The hydraulic mechanism is controlled to drive the upper die to move down, the upper and lower dies close, and the upper die squeezes the upper part of the molding material, so that the molding material in the cavity is heated and pressed into a molten state and fills the entire cavity. Step S4, after curing and forming for a specified high-temperature holding time, the upper mold is moved upward by a manual or automatic control hydraulic mechanism, the upper and lower molds are opened, the ejector rod is raised by pressing the ejector rod raising button, the molded part is ejected through the lower mold, and the molded part is removed; the ejector rod is raised, a limit switch sends a signal that the ejector rod is not in the lower limit position to the control system, and the control system outputs a hydraulic mechanism closing signal; when the ejector rod rises to the upper limit position, a delay switch starts timing for a time T1; Step S5, the ejector rod is retracted by pressing the ejector rod retraction button within the time T1, the next mold pressing material is put into the cavity, the limit switch sends a signal that the ejector rod reaches the lower limit position to the control system, the control system outputs a hydraulic mechanism opening signal, and the hydraulic mechanism drives the upper mold to move downward for the next mold pressing and forming; If the ejector rod retraction button is not pressed within the time T1, the control system sends an ejector rod retraction signal when the time T1 is reached, and the ejector rod is automatically retracted.

6. A mold processing method with a limiting function according to claim 5, wherein In the following steps, step S1, a delay switch two sets a delay time t1, which is the time between the upward movement of the hydraulic mechanism and the start of the upward movement of the ejector rod; Step S4, when the hydraulic mechanism starts to move upward, the delay assembly sets the time t1 to start timing; Step S5, the ejector rod is raised by pressing the ejector rod raising button within the time t1, and the ejector rod starts to rise; If the ejector rod raising button is not pressed within the time t1, the control system sends an ejector rod raising signal when the time t1 is reached, and the ejector rod is automatically raised.

7. A mold processing method with a limiting function according to claim 6, wherein In step S1, the mold pressing mold is replaced with another mold pressing mold, the height of the upward limit position of the ejector rod is adjusted, the sensor sends the different mold pressing mold information detected to the control system, the control system sends a signal to adjust the time set by the delay switch one and the delay switch two, the delay switch one sets the time T2, which is the time between the upward movement of the ejector rod to the upper limit position and the start of the retraction of the ejector rod; the delay switch two sets the time t2, which is the time between the start of the upward movement of the hydraulic mechanism and the start of the upward movement of the ejector rod.

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