Injection machine mold opening and closing control system and injection machine

Abstract

The invention discloses a control system for mold opening and closing of an injection machine and the injection machine. The control system comprises an input device and a control device, wherein the input device is used for obtaining the average speed and distance of mold opening and closing required by a mold; the controller comprises a master control unit, the master control unit is used for controlling the operation of the oil pump according to the average speed and distance of mold opening and closing needed by the mold and preset operation configuration information of the oil pump, and in the operation process of the oil pump, pressure oil is conveyed to the mold moving oil cylinder from the oil tank and then conveyed to the mold moving oil cylinder from the oil tank; the mold is pushed to act through pressure oil in the mold moving oil cylinder; the master control unit is connected with the input device; the master control unit is further used for calculating the mass, the moving speed and the moving acceleration of the mold according to the average speed and distance of mold opening and closing needed by the mold and data obtained by the sensor and determining the oil pump pressure, the oil pump rotating speed and the deceleration distance of the mold. According to the technical scheme, the setting types of the parameters and the setting difficulty of the parameters are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of injection machines, and in particular to a control system for opening and closing a mold of an injection machine and an injection machine. Background Art

[0002] In the field of injection molding, injection molding machines are key production equipment, and their performance is directly related to the quality and production efficiency of the final product. Especially in terms of the setting of mold opening and closing parameters, the current operation process still has many problems that rely on the operator's experience and repeated debugging, which not only limits the flexibility and efficiency of production, but also poses a challenge to product quality. At present, the setting of the mold opening and closing of the injection molding machine often requires the operator to adjust the mold opening and closing parameters of the injection molding machine by setting the oil pump pressure, mold speed and deceleration distance.

[0003] The above parameters often require the operator's on-site experience and repeated debugging to obtain better results, and debugging requires a lot of parameters and more debugging experience. Inexperienced operators find it difficult to quickly find the optimal configuration, resulting in low production efficiency or unstable product quality. Summary of the invention

[0004] The invention provides a control system for opening and closing a mold of an injection machine and an injection machine, so as to reduce the types of parameter settings and the difficulty of parameter settings.

[0005] According to one aspect of the present invention, a control system for opening and closing a mold of an injection molding machine is provided, comprising:

[0006] An input device, the input device is used to obtain an average speed and distance that the mold needs to open and close;

[0007] A controller, the controller comprising a general control unit, the general control unit is used to control the operation of the oil pump according to the average speed and distance of the mold opening and closing and the preset operation configuration information of the oil pump, wherein during the operation of the oil pump, the pressure oil is transported from the oil tank to the mold shifting cylinder, and the mold is pushed to move by the pressure oil in the mold shifting cylinder; the general control unit is connected to the input device;

[0008] The general control unit is also used to calculate the mass, moving speed and moving acceleration of the mold according to the average speed and distance that the mold needs to open and close and the data obtained by the sensor, and determine the oil pump pressure, oil pump speed and deceleration distance of the mold.

[0009] Optionally, the controller further includes a speed control unit, which is used to determine the moving speed of the mold according to the pre-position change information of the pressure oil in the mold shifting cylinder at preset time periods, and the speed control unit is connected to the general control unit.

[0010] Optionally, the controller further includes an acceleration control unit, which is used to determine the movement acceleration of the mold according to the movement speed of the mold, and the acceleration control unit is connected to the general control unit.

[0011] Optionally, the controller further comprises a hydraulic thrust determination unit, which is used to determine the hydraulic thrust according to the hydraulic pressure and the area of ​​the mold shifting cylinder, and the hydraulic thrust determination unit is connected to the general control unit.

[0012] Optionally, the master controller further comprises a mold quality determination unit, and the mold quality determination unit is used to determine the quality of the mold according to the hydraulic thrust, the movement acceleration of the mold, and the friction coefficient between the mold and the guide rail.

[0013] Optionally, the injection molding machine's mold opening and closing control system further includes a proportional speed control valve, the control end of which is connected to the general control unit. The general control unit controls the speed at which the pressure oil is delivered to the mold shifting cylinder by controlling the opening of the proportional speed control valve, thereby controlling the movement acceleration of the mold.

[0014] Optionally, a position sensor is further included, which is located in the mold shifting cylinder. The position sensor is used to obtain the pre-position change information of the pressure oil in the mold shifting cylinder at every preset time period, and the position sensor is connected to the general control unit.

[0015] Optionally, a pressure sensor is further included, which is located at the outlet of the oil pump and is used to obtain hydraulic pressure. The pressure sensor is connected to the main control unit.

[0016] Optionally, the input device includes a contact input device or a contactless input device.

[0017] According to another aspect of the present invention, there is provided an injection molding machine, comprising a control system for opening and closing a mold of the injection molding machine as described in any of the embodiments of the present invention.

[0018] The technical solution provided by the embodiment of the present invention allows the user to input the average speed and distance that the mold needs to open and close through an input device. The general control unit controls the operation of the oil pump according to the average speed and distance that the mold needs to open and close and the preset operation configuration information of the oil pump. During the operation of the oil pump, the general control unit calculates the mass, moving speed and moving acceleration of the mold according to the average speed and distance that the mold needs to open and close and the data obtained by the sensor, and determines the oil pump pressure, oil pump speed and deceleration distance of the mold. The above technical solution can save the setting of the oil pump pressure, oil pump speed and deceleration distance of the mold. The user only needs to input the average speed and preset distance of the mold movement to automatically calculate the oil pump pressure, oil pump speed and deceleration distance of the mold required in the opening and closing process of the injection molding machine, reducing the types of parameter settings and the difficulty of parameter settings in the opening and closing process of the injection molding machine.

[0019] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a flow chart of a control method for opening and closing a mold of an injection machine provided by an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A schematic diagram of the process included in S130;

[0023] Figure 3 It is a structural schematic diagram of a control system for opening and closing a mold of an injection molding machine provided by an embodiment of the present invention;

[0024] Figure 4 It is a structural schematic diagram of an injection molding machine provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiment of the present invention will be described clearly and completely in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or devices is not necessarily limited to those steps or devices that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] In order to reduce the types of parameter settings and the difficulty of parameter settings during the opening and closing of the mold of the injection molding machine, the embodiment of the present invention provides the following technical solutions:

[0028] like Figure 1 As shown, Figure 1 1 is a flow chart of a method for controlling mold opening and closing of an injection molding machine provided by an embodiment of the present invention. The method for controlling mold opening and closing of an injection molding machine comprises the following steps:

[0029] S110, obtaining the average speed and distance required for opening and closing the mold through an input device.

[0030] Specifically, in this embodiment, the user can input the average speed and distance that the mold needs to be opened and closed through the input device.

[0031] S120, the main control unit controls the operation of the oil pump according to the average speed and distance of the mold opening and closing required and the preset operation configuration information of the oil pump, wherein during the operation of the oil pump, the pressure oil is transported from the oil tank to the mold shifting cylinder, and the mold is pushed by the pressure oil in the mold shifting cylinder; the controller includes a main control unit, a speed control unit, an acceleration control unit, a hydraulic thrust determination unit and a mold quality determination unit.

[0032] The main control unit pre-stores preset operation configuration information of the oil pump corresponding to different average speeds and different preset distances. The preset operation configuration information of the oil pump includes the ratio of the acceleration distance, the uniform speed distance and the deceleration distance within the preset distance, and the corresponding speed and pressure of the oil pump within the acceleration distance, the uniform speed distance and the deceleration distance.

[0033] During the operation of the oil pump, the pressure oil is transported from the oil tank to the mold shifting cylinder, and the mold is pushed by the pressure oil in the mold shifting cylinder to achieve the opening and closing of the mold.

[0034] S130, the main control unit calculates the moving acceleration and mold mass according to the average speed and distance of the mold opening and closing and the data obtained by the sensor, and determines the oil pump pressure, oil pump speed and deceleration distance of the mold.

[0035] The technical solution provided by the embodiment of the present invention allows the user to input the average speed and distance that the mold needs to open and close through an input device. The general control unit controls the operation of the oil pump according to the average speed and distance that the mold needs to open and close and the preset operation configuration information of the oil pump. During the operation of the oil pump, the general control unit calculates the moving acceleration and the mold mass according to the average speed and distance that the mold needs to open and close and the data obtained by the sensor, and determines the oil pump pressure, oil pump speed and deceleration distance of the mold. The above technical solution can save the setting of the oil pump pressure, oil pump speed and deceleration distance of the mold. The user only needs to input the average speed and preset distance of the mold movement to automatically calculate the oil pump pressure, oil pump speed and deceleration distance of the mold required in the process of opening and closing the injection molding machine, thereby reducing the types of parameter settings and the difficulty of parameter settings in the process of opening and closing the injection molding machine.

[0036] Optionally, based on the above technical solution, Figure 2 As shown, Figure 2 yes Figure 1 The flow chart of S130 includes: the S130 general control unit calculates the moving acceleration and mold quality according to the average speed and distance of the mold opening and closing and the data obtained by the sensor, and determines the oil pump pressure, oil pump speed and mold deceleration distance including:

[0037] S1301. The speed control unit determines the moving speed of the mold according to the pre-position change information of the pressure oil in the mold shifting cylinder at every preset time period.

[0038] The pre-position change information of the pressure oil in the mold-shifting cylinder at every preset time period corresponds to the distance of the mold movement.

[0039] Specifically, the moving speed of the mold satisfies the following relationship:

[0040]

[0041] in, is the position information of the pressure oil in the mold shifting cylinder at the initial moment, It is the position information of the pressure oil in the mold shifting cylinder after a preset time period. is the moving speed of the mold, and Δt is the preset time period.

[0042] S1302: The acceleration control unit determines the moving acceleration of the mold according to the moving speed of the mold.

[0043] Among them, the moving acceleration of the mold satisfies the following relationship:

[0044]

[0045] in, is the moving speed of the mold at the initial moment, The moving speed of the mold after a preset time period. is the moving acceleration of the mold, and Δt is the preset time period.

[0046] S1303: The hydraulic thrust determination unit determines the hydraulic thrust according to the hydraulic pressure and the area of ​​the mold shifting cylinder.

[0047] Among them, the hydraulic pressure of the pressure oil per unit area in each direction of the mold shifting cylinder is equal, and the hydraulic thrust is determined according to the hydraulic pressure and the area of ​​the mold shifting cylinder.

[0048] S1304, the mold quality determination unit determines the quality of the mold according to the hydraulic thrust, the movement acceleration of the mold, and the friction coefficient between the mold and the guide rail.

[0049] Among them, the friction force between the mold and the guide rail is equal to the product of the weight of the mold and the friction coefficient.

[0050] The difference between the hydraulic thrust and the friction between the mold and the guide rail is equal to the product of the mold's moving acceleration and the mold's mass.

[0051] Therefore, the mold quality determination unit can determine the quality of the mold based on the hydraulic thrust, the movement acceleration of the mold, and the friction coefficient between the mold and the guide rail.

[0052] S1305, the general control unit determines the oil pump pressure, oil pump speed and deceleration distance of the mold according to the mass of the mold, the moving speed of the mold within the preset distance of the action, the moving acceleration and the corresponding time, and the friction between the mold and the guide rail.

[0053] Specifically, the hydraulic oil pump is one of the key components in the hydraulic system, which mainly converts the liquid pressure energy into mechanical energy, increases the liquid pressure, and ensures the normal operation of the hydraulic system. The pressure of the hydraulic oil pump is closely related to the speed.

[0054] In a hydraulic system, a hydraulic oil pump is usually driven by a power source such as an electric motor or an internal combustion engine. By rotating the hydraulic oil pump, the liquid is compressed inside the hydraulic oil pump, thereby generating a certain pressure. When the speed of the hydraulic oil pump changes, the outlet pressure of the hydraulic oil pump also changes accordingly. Generally speaking, when the speed of the hydraulic oil pump increases, the outlet pressure of the hydraulic oil pump will also increase, and vice versa.

[0055] During the operation of the oil pump, the pressure oil is transported from the oil tank to the mold shifting cylinder, and the mold is pushed by the pressure oil in the mold shifting cylinder. The oil pump pressure and the oil pump speed determine the hydraulic thrust. According to the acceleration requirements, the acceleration stage, the uniform speed stage and the deceleration stage, the oil pump pressure can be automatically matched. Therefore, the main control unit can calculate the oil pump pressure, the oil pump speed and the deceleration distance of the mold according to the mass of the mold, the moving speed of the mold within the preset distance of the action, the moving acceleration and the corresponding time, and the friction between the mold and the guide rail.

[0056] The technical solution provided by the embodiment of the present invention allows the user to input the average speed and distance that the mold needs to open and close by an input device. The general control unit controls the operation of the oil pump according to the average speed and distance that the mold needs to open and close and the preset operation configuration information of the oil pump. During the operation of the oil pump, the pressure oil is transported from the oil tank to the mold shifting cylinder, and the mold is pushed to move by the pressure oil in the mold shifting cylinder. The controller can collect the pre-position change information of the pressure oil in the mold shifting cylinder every preset time period, determine the moving speed of the mold and the moving acceleration of the mold, determine the hydraulic thrust by collecting the hydraulic pressure, and then determine the quality of the mold, and then determine the oil pump pressure, oil pump speed and mold deceleration distance according to the quality of the mold, the moving speed of the mold within the preset distance of the action, the moving acceleration and the corresponding time, and the friction between the mold and the guide rail. The above technical solution can save the setting of oil pump pressure, oil pump speed and mold deceleration distance. The user only needs to input the average speed and preset distance of the mold movement to automatically calculate the oil pump pressure, oil pump speed and mold deceleration distance required in the injection molding machine's mold opening and closing process, reducing the types of parameter settings and the difficulty of parameter setting in the injection molding machine's mold opening and closing process.

[0057] Optionally, based on the above technical solution, S1301, the speed control unit determines the moving speed of the mold according to the pre-position change information of the pressure oil in the mold-shifting cylinder every preset time period, including:

[0058] The speed control unit determines the moving speed of the mold based on the pre-position change information of the pressure oil in the mold shifting cylinder every 1ms.

[0059] Specifically, the speed control unit can determine the moving speed of the mold in real time according to the pre-position change information of the pressure oil in the mold shifting cylinder every 1 ms.

[0060] Optionally, based on the above technical solution, before the speed control unit S1301 determines the moving speed of the mold according to the pre-position change information of the pressure oil in the mold-shifting cylinder at a preset time period, it also includes:

[0061] The position sensor is used to obtain the pre-position change information of the pressure oil in the mold shifting cylinder at every preset time interval, and the position sensor is located in the mold shifting cylinder.

[0062] Optionally, based on the above technical solution, the hydraulic thrust determination unit S1303 determines the hydraulic thrust according to the hydraulic pressure and the area of ​​the mold shifting cylinder, and the above also includes:

[0063] The hydraulic pressure is obtained through a pressure sensor, which is located at the outlet of the oil pump.

[0064] The embodiment of the present invention also provides a control system for opening and closing the mold of an injection molding machine. Figure 3 and Figure 4 As shown, Figure 3 1 is a schematic diagram of the structure of a control system for opening and closing a mold of an injection molding machine provided by an embodiment of the present invention. Figure 4 1 is a structural schematic diagram of an injection molding machine provided by an embodiment of the present invention, wherein the control system for opening and closing the mold of the injection molding machine comprises: an input device 100, which is used to obtain the average speed and distance that the mold 200 needs to open and close the mold. A controller 300, which comprises a general control unit 301, which is used to control the operation of the oil pump 201 according to the average speed and distance that the mold 200 needs to open and close the mold and the preset operation configuration information of the oil pump 201, wherein during the operation of the oil pump 201, the pressure oil is transported from the oil tank 202 to the mold shifting cylinder 203, and the mold 200 is pushed to move by the pressure oil in the mold shifting cylinder 203; the general control unit 301 is connected to the input device 100; the general control unit 301 is also used to calculate the mass, moving speed, moving acceleration and mold mass of the mold 200 according to the average speed and distance that the mold 200 needs to open and close the mold and the data obtained by the sensor, and determine the oil pump pressure, oil pump speed and mold deceleration distance.

[0065] The technical solution provided by the embodiment of the present invention allows the user to input the average speed and distance that the mold 200 needs to open and close the mold through the input device 100. The general control unit 301 controls the operation of the oil pump according to the average speed and distance that the mold 200 needs to open and close the mold and the preset operation configuration information of the oil pump. During the operation of the oil pump, the general control unit 301 calculates the mass, moving speed and moving acceleration of the mold 200 according to the average speed and distance that the mold 200 needs to open and close the mold and the data obtained by the sensor, and determines the oil pump pressure, oil pump speed and deceleration distance of the mold. The above technical solution can save the setting of the oil pump pressure, oil pump speed and deceleration distance of the mold. The user only needs to input the average speed and preset distance of the mold movement, and the oil pump pressure, oil pump speed and deceleration distance of the mold required in the process of opening and closing the mold of the injection molding machine can be automatically calculated, reducing the types of parameter settings and the difficulty of parameter settings in the process of opening and closing the mold of the injection molding machine.

[0066] Optionally, based on the above technical solution, the control system also includes a controller 300, and the controller 300 also includes a speed control unit 302, an acceleration control unit 303, a hydraulic thrust determination unit 304 and a mold quality determination unit 305; the total control unit 301 is respectively connected to the speed control unit 302, the acceleration control unit 303, the hydraulic thrust determination unit 304 and the mold quality determination unit 305.

[0067] Optionally, based on the above technical solution, the speed control unit 302 is used to determine the moving speed of the mold 200 according to the pre-position change information of the pressure oil in the mold shifting cylinder 203 at preset time intervals.

[0068] Optionally, based on the above technical solution, the acceleration control unit 303 is used to determine the moving acceleration of the mold 200 according to the moving speed of the mold 200 .

[0069] Optionally, based on the above technical solution, the hydraulic thrust determination unit 304 is used to determine the hydraulic thrust according to the hydraulic pressure and the area of ​​the mold shifting cylinder 203 .

[0070] Optionally, based on the above technical solution, the mold quality determination unit 305 is used to determine the quality of the mold 200 according to the hydraulic thrust, the movement acceleration of the mold, and the friction coefficient between the mold and the guide rail.

[0071] Specifically, the main control unit 301 is used to determine the oil pump pressure, oil pump speed and deceleration distance of the mold 200 based on the mass of the mold 200, the moving speed of the mold 200 within a preset distance of the action, the moving acceleration and corresponding time, and the friction between the mold 200 and the guide rail.

[0072] Specifically, in this embodiment, the user can input the input device 100 into the mold 200 to determine the average speed and distance required for opening and closing the mold.

[0073] The preset operation configuration information of the oil pump 201 corresponding to different average speeds and different preset distances is pre-stored in the general control unit 301. The preset operation configuration information of the oil pump 201 includes the ratio of the acceleration distance, the uniform speed distance and the deceleration distance within the preset distance, and the corresponding speed and pressure of the oil pump 201 within the acceleration distance, the uniform speed distance and the deceleration distance.

[0074] During the operation of the oil pump 201 , the pressure oil is transported from the oil tank 202 to the mold shifting cylinder 203 , and the mold 200 is pushed by the pressure oil in the mold shifting cylinder 203 to achieve the opening and closing of the mold 200 .

[0075] The pre-position change information of the pressure oil in the mold-shifting cylinder 203 at every preset time period corresponds to the movement distance of the mold 200 .

[0076] Specifically, the moving speed of the mold 200 satisfies the following relationship:

[0077]

[0078] in, is the position information of the pressure oil in the mold shifting cylinder 203 at the initial moment, is the position information of the pressure oil in the mold shifting cylinder 203 after a preset time period. is the moving speed of the mold 200, and Δt is a preset time period.

[0079] The moving acceleration of the mold 200 satisfies the following relationship:

[0080]

[0081] in, is the moving speed of the mold 200 at the initial moment, is the moving speed of the mold 200 after a preset time period, is the moving acceleration of the mold 200, and Δt is a preset time period.

[0082] The hydraulic pressure of the pressure oil per unit area in each direction of the mold-shifting cylinder 203 is equal, and the hydraulic thrust can be determined according to the hydraulic pressure and the area of ​​the mold-shifting cylinder 203 .

[0083] The friction force between the mold 200 and the guide rail is equal to the product of the gravity of the mold 200 and the friction coefficient.

[0084] The difference between the hydraulic thrust and the friction force between the mold and the guide rail is equal to the product of the moving acceleration of the mold 200 and the mass of the mold 200 .

[0085] Therefore, the mold quality determination unit 305 may determine the quality of the mold 200 according to the hydraulic thrust, the movement acceleration of the mold 200 , and the friction coefficient between the mold 200 and the guide rail.

[0086] During the operation of the oil pump 201, the pressure oil is transported from the oil tank 202 to the mold shifting cylinder 203, and the mold 200 is pushed to move by the pressure oil in the mold shifting cylinder 203. The oil pump pressure and the oil pump speed determine the hydraulic thrust. Therefore, the general control unit 301 can calculate the oil pump pressure, the oil pump speed and the deceleration distance of the mold according to the mass of the mold 200, the moving speed of the mold 200 within the preset distance of the action, the moving acceleration and the corresponding time, and the friction between the mold 200 and the guide rail. The technical solution provided by the embodiment of the present invention allows the user to input the average speed and distance that the mold 200 needs to open and close the mold by the input device 100. The general control unit 301 controls the operation of the oil pump 201 according to the average speed and distance that the mold 200 needs to open and close the mold and the preset operation configuration information of the oil pump 201. During the operation of the oil pump 201, the pressure oil is transported from the oil tank 202 to the mold shifting cylinder 203, and the mold 200 is pushed to move by the pressure oil in the mold shifting cylinder 203. The controller 300 can collect the pre-position change information of the pressure oil in the mold shifting cylinder every preset time period, determine the moving speed and the moving acceleration of the mold, and determine the hydraulic thrust by collecting the hydraulic pressure, and then determine the mass of the mold 200. Then, according to the mass of the mold 200, the moving speed, moving acceleration and corresponding time of the mold 200 within the preset distance of the action, and the friction between the mold and the guide rail, the oil pump pressure, oil pump speed and the deceleration distance of the mold 200 are determined. The above technical solution can save the setting of the oil pump pressure, oil pump speed and the deceleration distance of the mold. The user only needs to input the average speed and preset distance of the mold 200 action, and the oil pump pressure, oil pump speed and the deceleration distance of the mold 200 required in the opening and closing process of the injection molding machine can be automatically calculated, which reduces the types of parameter settings and the difficulty of parameter settings in the opening and closing process of the injection molding machine. Optionally, based on the above technical solution, the control system for opening and closing the mold of the injection molding machine also includes a proportional speed control valve 2061, and the control end of the proportional speed control valve 2061 is connected to the main control unit 301. The main control unit 301 controls the speed at which the pressure oil is delivered to the mold shifting cylinder by controlling the opening size of the proportional speed control valve 2061, thereby controlling the moving speed of the mold 200.

[0087] Optionally, based on the above technical solution, it also includes a position sensor 204, which is located in the mold shifting cylinder 203. The position sensor 204 is used to obtain the pre-position change information of the pressure oil in the mold shifting cylinder at every preset time period. The position sensor 204 is connected to the main control unit 301.

[0088] Optionally, based on the above technical solution, a pressure sensor 205 is further included. The pressure sensor 205 is located at the outlet of the oil pump 201 . The pressure sensor 205 is used to obtain the hydraulic pressure. The pressure sensor 205 is connected to the main control unit 301 .

[0089] Optionally, based on the above technical solution, the input device 100 includes a contact input device or a non-contact input device. The contact input device includes at least one of a physical button, a touch screen, a joystick and a knob. The non-contact input device includes a human-computer interaction interface such as voice recognition, gesture recognition and eye movement recognition.

[0090] Optionally, the control system for opening and closing the mold of the injection molding machine further includes an electromagnetic control valve 206, which includes a proportional valve and a directional valve. Under the control of the general control unit 301, during the operation of the oil pump 201, the pressure oil is transported from the oil tank 202 to the mold shifting cylinder 203, and the mold 200 is pushed to move by the pressure oil in the mold shifting cylinder 203. The electromagnetic control valve 206 includes a proportional speed control valve 2061.

[0091] The embodiment of the present invention further provides an injection molding machine, comprising the injection molding machine mold opening and closing control system described in any embodiment of the present invention. The injection molding machine has the beneficial effects of the injection molding machine mold opening and closing control system described in any embodiment, which will not be described in detail here.

[0092] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0093] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control system for opening and closing molds of an injection molding machine, characterized in that: include: An input device, the input device is used to obtain an average speed and distance that the mold needs to open and close; A controller, the controller comprising a general control unit, the general control unit being used to control the operation of the oil pump according to the average speed and distance of the mold opening and closing required by the mold and the preset operation configuration information of the oil pump, wherein during the operation of the oil pump, the pressure oil is transported from the oil tank to the mold shifting cylinder, and the mold is pushed to move by the pressure oil in the mold shifting cylinder; the general control unit is connected to the input device; The general control unit is also used to calculate the mass, moving speed and moving acceleration of the mold according to the average speed and distance that the mold needs to open and close and the data obtained by the sensor, and determine the oil pump pressure, oil pump speed and deceleration distance of the mold.

2. The control system for opening and closing the mold of the injection molding machine according to claim 1, characterized in that: The controller further comprises a speed control unit, which is used to determine the moving speed of the mold according to the pre-position change information of the pressure oil in the mold shifting cylinder at preset time intervals, and the speed control unit is connected to the general control unit.

3. The control system for opening and closing molds of an injection molding machine according to claim 2, characterized in that: The controller further includes an acceleration control unit, which is used to determine the moving acceleration of the mold according to the moving speed of the mold, and the acceleration control unit is connected to the overall control unit.

4. The control system for opening and closing molds of an injection molding machine according to claim 1, characterized in that: The controller further comprises a hydraulic thrust determination unit, which is used to determine the hydraulic thrust according to the hydraulic pressure and the area of ​​the mold shifting cylinder, and the hydraulic thrust determination unit is connected to the general control unit.

5. The control system for opening and closing molds of an injection molding machine according to claim 4, characterized in that: The master controller further comprises a mold quality determination unit, which is used to determine the quality of the mold according to the hydraulic thrust, the moving acceleration of the mold, and the friction coefficient between the mold and the guide rail.

6. The control system for opening and closing molds of an injection molding machine according to claim 1, characterized in that: The control system for opening and closing the mold of the injection molding machine also includes a proportional speed control valve, the control end of which is connected to the general control unit. The general control unit controls the speed at which the pressure oil is delivered to the mold shifting cylinder by controlling the opening size of the proportional speed control valve, thereby controlling the moving speed of the mold.

7. The control system for opening and closing molds of an injection molding machine according to claim 2, characterized in that: It also includes a position sensor, which is located in the mold shifting cylinder. The position sensor is used to obtain the pre-position change information of the pressure oil in the mold shifting cylinder at every preset time period. The position sensor is connected to the general control unit.

8. The control system for opening and closing molds of an injection molding machine according to claim 1, characterized in that: It also includes a pressure sensor, which is located at the outlet of the oil pump and is used to obtain hydraulic pressure. The pressure sensor is connected to the main control unit.

9. The control system for opening and closing molds of an injection molding machine according to claim 1, characterized in that: The input device includes a contact input device or a non-contact input device.

10. An injection molding machine, characterized in that: A control system for opening and closing molds of an injection molding machine comprising any one of claims 1-9.

Images