Injection machine mold opening and closing control system and injection machine

Abstract

The utility model 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 utility model relates to injection molding machine technical field especially relates to a control system and injection molding machine that injection molding machine opens and shuts. BACKGROUND

[0002] In the injection molding field, injection molding machine as the key production equipment, its performance is directly related to the quality and production efficiency of final product. Especially in the opening and closing mold parameter setting, the current operation process still has many problems which depend on the experience of operator and repeated debugging, this not only limits the flexibility and efficiency of production, also puts forward the challenge to product quality. The setting of the opening and closing mold of the injection molding machine often needs to be adjusted by the operator by setting the pressure of the oil pump, the speed of the mold and the deceleration distance.

[0003] The above parameters often need the on-site experience of the operator and repeated debugging to obtain better results, and the parameters are numerous and require more debugging experience when debugging. The inexperienced operator is difficult to quickly find the optimal configuration, resulting in low production efficiency or unstable product quality. INVENTION CONTENTS

[0004] The utility model provides a control system and injection molding machine that injection molding machine opens and shuts to reduce the setting type of parameter and the setting difficulty of parameter.

[0005] According to an aspect of the utility model, a control system that injection molding machine opens and shuts is provided, comprising:

[0006] Input device, the input device is used for obtaining the average speed and distance that mold needs to open and shut;

[0007] Controller, the controller includes total control unit, and the total control unit is used for the average speed and distance that mold needs to open and shut and the preset running configuration information of oil pump, controls oil pump operation, wherein, in the process of oil pump operation, pressure oil is transported from oil tank to mold moving oil cylinder, and the mold is actuated by pressure oil in mold moving oil cylinder;Total control unit is connected with input device;

[0008] The total control unit is also used for calculating the mass, moving speed and moving acceleration of the mold according to the average speed and distance that the mold needs to open and shut and the data obtained by the sensor, and determining the oil pump pressure, oil pump rotating speed and deceleration distance of the mold.

[0009] Optionally, the controller further includes a speed control unit, the speed control unit is used for determining the moving speed of the mold according to the pre-position change information of pressure oil in the mold moving oil cylinder in a preset time period, and the speed control unit is connected with the total control unit.

[0010] Optionally, the controller further comprises an acceleration control unit for determining the moving acceleration of the mold according to the moving speed of the mold, and the acceleration control unit is connected with the total control unit.

[0011] Optionally, the controller further comprises a hydraulic thrust determination unit for determining the hydraulic thrust according to the hydraulic pressure and the area of the mold moving cylinder, and the hydraulic thrust determination unit is connected with the total control unit.

[0012] Optionally, the total controller further comprises a mold mass determination unit for determining the mass of the mold according to the hydraulic thrust, the moving acceleration of the mold and the friction coefficient of the mold and the guide rail.

[0013] Optionally, the mold opening and closing control system of the injection machine further comprises a proportional speed control valve, a control end of the proportional speed control valve is connected with the total control unit, and the total control unit controls the speed of the pressure oil transported to the mold moving cylinder by controlling the opening degree of the proportional speed control valve, thereby controlling the moving acceleration of the mold.

[0014] Optionally, a position sensor is further comprised, the position sensor is located in the mold moving cylinder, the position sensor is used for acquiring the pre-position change information of the pressure oil in the mold moving cylinder every interval of a preset time period, and the position sensor is connected with the total control unit.

[0015] Optionally, a pressure sensor is further comprised, the pressure sensor is located at the outlet of the oil pump, the pressure sensor is used for acquiring the hydraulic pressure, and the pressure sensor is connected with the total control unit.

[0016] Optionally, the input device comprises a contact input device or a non-contact input device.

[0017] According to another aspect of the utility model, an injection machine is provided, which comprises the mold opening and closing control system of the injection machine according to any of the embodiments of the utility model.

[0018] The technical scheme provided by the embodiment of the utility model, the user can input the average speed and distance of mold opening and closing required by the input device, the total control unit controls the oil pump operation according to the average speed and distance of mold opening and closing required by the mold and the preset operation configuration information of the oil pump, in the process of oil pump operation, the total control unit calculates the mass, moving speed and moving acceleration of the mold according to the average speed and distance of mold opening and closing required by the mold and the data obtained by the sensor, and determines the oil pump pressure, oil pump rotating speed and deceleration distance of the mold, the above technical scheme can save the setting of oil pump pressure, oil pump rotating speed and deceleration distance of the mold, the user only needs to input the average speed and preset distance of mold action, and the oil pump pressure, oil pump rotating speed and deceleration distance of the mold required in the mold opening and closing process of the injection machine can be automatically calculated, and the setting type and setting difficulty of parameters in the mold opening and closing process of the injection machine are reduced.

[0019] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the utility model, and is not used to limit the scope of the utility model. Other features of the utility model will become easy to understand through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

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

[0022] Figure 2 It is Figure 1 The flow chart included in S130 in

[0023] Figure 3 It is a structural schematic diagram of the control system of the injection machine opening and closing mold provided by the embodiment of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the injection machine provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that includes a series of steps or apparatuses is not necessarily limited to those steps or apparatuses explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatuses.

[0027] To reduce the types and difficulty of setting parameters during the mold opening and closing process of an injection molding machine, this utility model provides the following technical solution:

[0028] like Figure 1 As shown, Figure 1 This is a flowchart of a control method for opening and closing the mold of an injection molding machine according to an embodiment of the present invention. The control method for opening and closing the mold of an injection molding machine includes the following steps:

[0029] S110: Obtain the average speed and distance required for mold opening and closing through the input device.

[0030] Specifically, in this embodiment, the user can input the average speed and distance at which the mold needs to open and close by using an input device.

[0031] S120, the main control unit controls the operation of the oil pump according to the average speed and distance of mold opening and closing as required by the mold and the preset operation configuration information of the oil pump. During the operation of the oil pump, the pressurized oil is transported from the oil tank to the mold moving cylinder, and the pressurized oil in the mold moving cylinder pushes the mold to move. The controller includes a main control unit, a speed control unit, an acceleration control unit, a hydraulic thrust determination unit and a mold mass determination unit.

[0032] The main control unit stores preset operating configuration information for the oil pumps at different average speeds and preset distances. This preset operating configuration information includes the ratio of acceleration distance, constant speed distance, and deceleration distance within the preset distance, as well as the corresponding rotational speed and pressure of the oil pump within each of those distances.

[0033] During operation, the oil pump transports pressurized oil from the oil tank to the mold-moving cylinder, and the pressurized oil in the mold-moving cylinder drives the mold to open and close.

[0034] S130: The main control unit calculates the moving acceleration and mold mass based on the average speed and distance of the mold opening and closing as required by the mold and the data obtained by the sensor, and determines the oil pump pressure, oil pump speed and mold deceleration distance.

[0035] The technical solution provided by this utility model allows users to input the average speed and distance required for mold opening and closing via an input device. The main control unit controls the oil pump operation based on the average speed and distance required for mold opening and closing, as well as the preset operating configuration information of the oil pump. During oil pump operation, the main control unit calculates the moving acceleration and mold mass based on the average speed and distance required for mold opening and closing, as well as data acquired by sensors, and determines the oil pump pressure, oil pump speed, and mold deceleration distance. This technical solution eliminates the need to set the oil pump pressure, oil pump speed, and mold deceleration distance. Users only need 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 during the injection molding machine's mold opening and closing process, reducing the types and difficulty of setting parameters during the injection molding machine's mold opening and closing process.

[0036] Optionally, based on the above technical solutions, such as Figure 2 As shown, Figure 2 yes Figure 1 The S130 process flow diagram shows that the S130 main control unit calculates the moving acceleration and mold mass based on the average speed and distance of mold opening and closing, as well as data acquired by sensors. It also determines the oil pump pressure, oil pump speed, and mold deceleration distance, including:

[0037] S1301, the speed control unit determines the mold moving speed based on the pre-position change information of the pressure oil in the mold moving cylinder at preset time intervals.

[0038] Among them, the pre-position change information of the pressure oil in the mold moving cylinder at preset time intervals corresponds to the distance of the mold movement.

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

[0040]

[0041] in, This provides the initial position information of the pressure oil inside the mold-moving cylinder. This provides the position information of the pressure oil in the mold-moving cylinder after a preset time interval. Δt represents the moving speed of the mold, and Δt represents the preset time period.

[0042] S1302, The acceleration control unit determines the moving acceleration of the mold based on the moving speed of the mold.

[0043] The acceleration of the mold's movement satisfies the following relationship:

[0044]

[0045] in, The initial moving speed of the mold. The moving speed of the mold after a preset time interval. Δt represents the acceleration of the mold movement, and Δt represents the preset time period.

[0046] S1303, the hydraulic thrust determination unit determines the hydraulic thrust based on the hydraulic pressure and the area of ​​the mold moving cylinder.

[0047] The hydraulic pressure of the oil per unit area in all directions within the mold-moving cylinder is equal. The hydraulic thrust is determined based on the hydraulic pressure and the area of ​​the mold-moving cylinder.

[0048] S1304, The mold quality determination unit determines the quality of the mold based on the hydraulic thrust, the mold's moving acceleration, and the friction coefficient between the mold and the guide rail.

[0049] The frictional force between the mold and the guide rail is equal to the product of the mold's weight and the coefficient of friction.

[0050] The difference between the hydraulic thrust and the frictional force 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 mold's moving acceleration, and the friction coefficient between the mold and the guide rail.

[0052] S1305 The main control unit determines the oil pump pressure, oil pump speed, and deceleration distance of the mold based on the mold's mass, the mold's moving speed within the preset distance of the action, the moving acceleration and corresponding time, and the friction between the mold and the guide rail.

[0053] Specifically, the hydraulic pump is one of the key components of a hydraulic system, primarily responsible for converting fluid pressure energy into mechanical energy, increasing fluid pressure, and ensuring the normal operation of the hydraulic system. The pressure and rotational speed of a hydraulic pump are closely related.

[0054] In hydraulic systems, hydraulic pumps are typically driven by power sources such as electric motors or internal combustion engines. Rotating the pump compresses the fluid inside, generating pressure. When the pump's rotational speed changes, the outlet pressure also changes accordingly. Generally, as the pump's rotational speed increases, the outlet pressure increases, and vice versa.

[0055] During operation, the oil pump delivers pressurized oil from the oil tank to the mold-moving cylinder, and the pressurized oil within the cylinder propels the mold. The oil pump pressure and speed determine the hydraulic thrust. Based on acceleration requirements, the pump can automatically adjust the pressure for acceleration, constant speed, and deceleration phases. Therefore, the main control unit calculates the oil pump pressure, pump speed, and deceleration distance based on the mold's mass, its speed over a preset distance, acceleration, corresponding time, and friction between the mold and guide rails.

[0056] The technical solution provided by this utility model embodiment allows users to input the average speed and distance required for mold opening and closing via an input device. The main control unit controls the operation of the oil pump based on the average speed and distance required for mold opening and closing, as well as the preset operating configuration information of the oil pump. During the operation of the oil pump, pressurized oil is transported from the oil tank to the mold-moving cylinder, and the pressurized oil in the mold-moving cylinder pushes the mold to move. The controller can collect the pre-position change information of the pressurized oil in the mold-moving cylinder at preset time intervals to determine the moving speed and acceleration of the mold. By collecting the hydraulic pressure, the hydraulic thrust is determined, thereby determining the mass of the mold. Then, based on the mass of the mold, the moving speed and acceleration of the mold within the preset distance of the movement, the corresponding time, and the friction between the mold and the guide rail, the oil pump pressure, oil pump speed, and mold deceleration distance are determined. The above technical solution can eliminate the need to set the oil pump pressure, oil pump speed and mold deceleration distance. Users only need to input the average speed of the mold movement and the preset distance, and the oil pump pressure, oil pump speed and mold deceleration distance required during the mold opening and closing process of the injection molding machine can be automatically calculated, reducing the types of parameters to be set and the difficulty of setting parameters during the mold opening and closing process of the injection molding machine.

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

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

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

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

[0061] The position sensor, located inside the mold-moving cylinder, acquires the pre-position change information of the pressure oil in the cylinder at preset time intervals.

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

[0063] Hydraulic pressure is obtained through a pressure sensor located at the outlet of the oil pump.

[0064] This utility model embodiment also provides a control system for the opening and closing of an injection molding machine. For example... Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram of the structure of a mold opening and closing control system for an injection molding machine provided in an embodiment of this utility model. Figure 4 This is a schematic diagram of an injection molding machine according to an embodiment of the present invention. The mold opening and closing control system of the injection molding machine includes: an input device 100, which is used to acquire the average speed and distance at which the mold 200 needs to open and close; and a controller 300, which includes a main control unit 301. The main control unit 301 is used to control the operation of the oil pump 201 according to the average speed and distance at which the mold 200 needs to open and close and the preset operating configuration information of the oil pump 201. During the operation of the oil pump 201, pressurized oil is transported from the oil tank 202 to the mold moving cylinder 203, and the pressurized oil in the mold moving cylinder 203 pushes the mold 200 to move. The main control unit 301 is connected to the input device 100. The main control unit 301 is also used to calculate the mass, moving speed and moving acceleration of the mold 200 and the mold mass, and determine the oil pump pressure, oil pump speed and mold deceleration distance, according to the average speed and distance at which the mold 200 needs to open and close and the data acquired by the sensor.

[0065] The technical solution provided by this utility model embodiment allows users to input the average speed and distance required for mold 200 to open and close via input device 100. The main control unit 301 controls the operation of the oil pump based on the average speed and distance required for mold 200 to open and close, and the preset operating configuration information of the oil pump. During oil pump operation, the main control unit 301 calculates the mass, moving speed, and moving acceleration of the mold 200 based on the average speed and distance required for mold 200 to open and close, and data acquired by sensors, and determines the oil pump pressure, oil pump speed, and mold deceleration distance. This technical solution eliminates the need to set the oil pump pressure, oil pump speed, and mold deceleration distance. Users only need to input the average speed and preset distance of the mold movement to automatically calculate the required oil pump pressure, oil pump speed, and mold deceleration distance during the injection molding machine's mold opening and closing process, reducing the types and difficulty of setting parameters during the injection molding machine's mold opening and closing process.

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

[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 moving 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 moving 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 moving 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, moving acceleration, and corresponding time of the mold 200 within the preset distance of the action, as well as the friction between the mold 200 and the guide rail.

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

[0073] The main control unit 301 stores preset operating configuration information for the oil pump 201 corresponding to different average speeds and preset distances. The preset operating configuration information for the oil pump 201 includes the ratio of acceleration distance, constant speed distance, and deceleration distance within the preset distance, as well as the corresponding rotational speed and pressure of the oil pump 201 within the acceleration distance, constant speed distance, and deceleration distance.

[0074] During operation, the oil pump 201 transports pressurized oil from the oil tank 202 to the mold moving cylinder 203, and the pressurized oil in the mold moving cylinder 203 drives the mold 200 to move, so as to realize the mold opening and closing of the mold 200.

[0075] Among them, the pre-position change information of the pressure oil in the mold moving cylinder 203 at preset time intervals corresponds to the distance of the mold 200 movement.

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

[0077]

[0078] in, This provides the initial position information of the pressure oil inside the mold-moving cylinder 203. This provides the position information of the pressure oil inside the mold-moving cylinder 203 after a preset time interval. Δt represents the moving speed of mold 200, and Δt represents the preset time period.

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

[0080]

[0081] in, The initial moving speed of mold 200. The moving speed of mold 200 after a preset time interval. Δt represents the acceleration of the mold 200 as it moves, and Δt represents the preset time period.

[0082] The hydraulic pressure of the pressure oil per unit area in all directions within the mold-moving cylinder 203 is equal. Based on the hydraulic pressure and the area of ​​the mold-moving cylinder 203, the hydraulic thrust can be determined.

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

[0084] The difference between the hydraulic thrust and the frictional 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 can determine the quality of the mold 200 based on the hydraulic thrust, the moving acceleration of the mold 200, and the friction coefficient between the mold 200 and the guide rail.

[0086] During operation, the oil pump 201 delivers pressurized oil from the oil tank 202 to the mold-moving cylinder 203, and the pressurized oil in the mold-moving cylinder 203 drives the mold 200 to move. The oil pump pressure and oil pump speed determine the hydraulic thrust. Therefore, the main control unit 301 can calculate the oil pump pressure, oil pump speed, and mold deceleration distance based on the mass of the mold 200, the moving speed, acceleration, and corresponding time of the mold 200 within a preset distance, and the friction between the mold 200 and the guide rail. The technical solution provided by this embodiment allows the user to input the average speed and distance required for the mold 200 to open and close via the input device 100. The main control unit 301 controls the operation of the oil pump 201 based on the average speed and distance required for the mold 200 to open and close, and the preset operating configuration information of the oil pump 201. During the operation of the oil pump 201, pressurized oil is transported from the oil tank 202 to the mold-moving cylinder 203. The pressurized oil in the mold-moving cylinder 203 drives the mold 200 to move. The controller 300 can collect the pre-position change information of the pressurized oil in the mold-moving cylinder at preset time intervals to determine the mold's moving speed and acceleration. By collecting the hydraulic pressure, the hydraulic thrust is determined, and thus the mass of the mold 200 is determined. Then, based on the mass of the mold 200, the moving speed and acceleration of the mold 200 within the preset distance of the movement, the corresponding time, and the friction between the mold and the guide rail, the oil pump pressure, oil pump speed, and deceleration distance of the mold 200 are determined. The above technical solution can eliminate the need to set the 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 200's movement, and the oil pump pressure, oil pump speed, and mold deceleration distance required during the mold opening and closing process of the injection molding machine can be automatically calculated, reducing the types and difficulty of setting parameters during the mold opening and closing process of the injection molding machine. Optionally, based on the above technical solution, the injection molding machine mold opening and closing control system also includes a proportional speed control valve 2061. 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 moving cylinder by controlling the opening degree of the proportional speed control valve 2061, thereby controlling the moving speed of the mold 200.

[0087] Optionally, based on the above technical solution, a position sensor 204 is also included. The position sensor 204 is located inside the mold moving cylinder 203. The position sensor 204 is used to acquire the pre-position change information of the pressure oil in the mold moving cylinder at preset time intervals. 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 also included. The pressure sensor 205 is located at the outlet of the oil pump 201. The pressure sensor 205 is used to obtain hydraulic pressure and 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 contactless input device. Contact input devices include at least one of physical buttons, a touchscreen, a joystick, and a knob. Contactless input devices include human-computer interaction interfaces such as voice recognition, gesture recognition, and eye-tracking recognition.

[0090] Optionally, the injection molding machine's mold opening and closing control system also includes an electromagnetic control valve 206. The electromagnetic control valve 206 includes a proportional valve and a directional valve. Under the control of the main control unit 301, during the operation of the oil pump 201, pressurized oil is transported from the oil tank 202 to the mold-moving cylinder 203, and the pressurized oil located in the mold-moving cylinder 203 drives the mold 200 to move. The electromagnetic control valve 206 includes a proportional speed control valve 2061.

[0091] This utility model embodiment also provides an injection molding machine, including the injection molding machine mold opening and closing control system described in any of the embodiments of this utility model. This injection molding machine has the beneficial effects of the injection molding machine mold opening and closing control system described in any of the embodiments, which will not be repeated here.

[0092] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0093] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A control system for opening and closing the mold of an injection molding machine, characterized in that, include: An input device, wherein the input device is used to obtain the average speed and distance at which the mold needs to open and close; The controller includes a main control unit, which controls the operation of the oil pump based on the average speed and distance of mold opening and closing required by the mold and the preset operating configuration information of the oil pump. During the operation of the oil pump, pressurized oil is transported from the oil tank to the mold moving cylinder, and the pressurized oil located in the mold moving cylinder drives the mold to move. The main control unit is connected to the input device. The main control unit is also used to calculate the mass, moving speed and moving acceleration of the mold based on the average speed and distance of the mold opening and closing and the data obtained by the sensor, and to determine the oil pump pressure, oil pump speed and the deceleration distance of the mold.

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

3. The injection molding machine mold opening and closing control system according to claim 2, characterized in that, The controller also includes an acceleration control unit, which is used to determine the moving acceleration of the mold based on the moving speed of the mold. The acceleration control unit is connected to the main control unit.

4. The injection molding machine mold opening and closing control system according to claim 1, characterized in that, The controller further includes a hydraulic thrust determination unit, which is used to determine the hydraulic thrust based on the hydraulic pressure and the area of ​​the mold moving cylinder. The hydraulic thrust determination unit is connected to the main control unit.

5. The injection molding machine mold opening and closing control system according to claim 4, characterized in that, The controller further includes a mold mass determination unit, which is used to determine the mass of the mold based on the hydraulic thrust, the moving acceleration of the mold, and the friction coefficient between the mold and the guide rail.

6. The injection molding machine mold opening and closing control system according to claim 1, characterized in that, The injection molding machine's mold opening and closing control system also includes a proportional speed control valve. The control terminal of the proportional speed control valve is connected to the main control unit. The main control unit controls the speed at which the pressurized oil is delivered to the mold moving cylinder by controlling the opening degree of the proportional speed control valve, thereby controlling the moving speed of the mold.

7. The injection molding machine mold opening and closing control system according to claim 2, characterized in that, It also includes a position sensor located inside the mold-moving cylinder. The position sensor is used to acquire the pre-position change information of the pressure oil inside the mold-moving cylinder at preset time intervals. The position sensor is connected to the main control unit.

8. The injection molding machine mold opening and closing control system according to claim 1, characterized in that, It also includes a pressure sensor located at the outlet of the oil pump, the pressure sensor being used to acquire hydraulic pressure, and the pressure sensor being connected to the main control unit.

9. The injection molding machine mold opening and closing control system 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, The control system for opening and closing the injection molding machine as described in any one of claims 1-9.

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