阅读说明：本技术 注塑机控制装置及其控制方法、注塑机 (injection molding machine control device, control method thereof and injection molding machine ) 是由 匡业 何春茂 葛智光 于 2019-10-16 设计创作，主要内容包括：一种注塑机控制装置及其控制方法、注塑机,注塑机控制装置包括压力感应器件,压力感应器件固定于注塑机的顶针的一端,压力感应器件用于根据制品反馈的压力值生成压力感应信号；控制器,控制器与压力感应器件电连接,控制器根据接收到的压力感应信号调节输出的模式调节信号；电机,电机与控制器电连接,顶针在电机的控制下移动,电机根据接收到的模式调节信号调节对顶针的控制模式；其中,控制模式包括位置控制模式和转矩控制模式。通过本发明的技术方案,形成了完整的闭环控制过程,提高了对注塑机的控制过程的可靠性,避免了开环控制导致的影响产品美观以及无法保证产品合格率的问题,有利于提高注塑产品的成品率,提升产品的美观度。(an injection molding machine control device and a control method thereof, as well as an injection molding machine, wherein the injection molding machine control device comprises a pressure sensing device, the pressure sensing device is fixed at one end of an ejector pin of the injection molding machine, and the pressure sensing device is used for generating a pressure sensing signal according to a pressure value fed back by a product; the controller is electrically connected with the pressure sensing device and adjusts the output mode adjusting signal according to the received pressure sensing signal; the motor is electrically connected with the controller, the thimble moves under the control of the motor, and the motor adjusts the control mode of the thimble according to the received mode adjusting signal; the control mode comprises a position control mode and a torque control mode. Through the technical scheme of the invention, a complete closed-loop control process is formed, the reliability of the control process of the injection molding machine is improved, the problems that the attractiveness of products is influenced and the qualification rate of the products cannot be ensured due to open-loop control are solved, the yield of injection molding products is improved, and the attractiveness of the products is improved.)

1. An injection molding machine control device, comprising:

the pressure sensing device is fixed at one end of an ejector pin of the injection molding machine and used for generating a pressure sensing signal according to a pressure value fed back by a product;

the controller is electrically connected with the pressure sensing device and used for adjusting an output mode adjusting signal according to the received pressure sensing signal;

The motor is electrically connected with the controller, the ejector pin moves under the control of the motor, and the motor is used for adjusting a control mode of the ejector pin according to the received mode adjusting signal; wherein the control modes include a position control mode and a torque control mode.

2. The injection molding machine control device according to claim 1, further comprising:

the position sensing device is arranged on the surface of the product close to the thimble and used for detecting the position of one end of the thimble, provided with the pressure sensing device, and generating a position sensing signal;

the controller is electrically connected with the position sensing device and used for adjusting an output mode adjusting signal according to the received pressure sensing signal and the position sensing signal.

3. The injection molding machine control device according to claim 1, further comprising:

the input device is used for receiving the setting parameters input by the user and generating setting parameter signals.

4. the control apparatus of claim 3 wherein said set parameters include a distance parameter, said input means for generating a distance parameter signal; wherein the distance parameter comprises a distance from the surface of the product close to the thimble to an initial position of one end of the thimble where the pressure sensing device is arranged;

The controller is electrically connected with the input device and is used for adjusting the output speed adjusting signal according to the received distance parameter signal;

And the motor controls the moving speed of the thimble in the position control mode according to the received speed adjusting signal.

5. The control apparatus of claim 3 wherein said set-up parameters include characteristic parameters, said input means being for generating characteristic parameter signals; wherein the characteristic parameter comprises a physical characteristic of the article;

The controller is electrically connected with the input device and is used for adjusting the output torque adjusting signal according to the received characteristic parameter signal and the pressure sensing signal;

The motor controls its own torque in the torque control mode according to the received torque adjustment signal.

6. the injection molding machine control apparatus of claim 1, wherein said pressure sensing device is rigidly secured to one end of a thimble of said injection molding machine.

7. a control method of an injection molding machine, characterized by comprising:

the pressure sensing device generates a pressure sensing signal according to the pressure value fed back by the product;

The controller adjusts the output mode adjusting signal according to the received pressure sensing signal;

The motor adjusts a control mode of an ejector pin of the injection molding machine according to the received mode adjusting signal; wherein the control modes include a position control mode and a torque control mode.

8. The injection molding machine control method according to claim 7, comprising:

When the controller judges that the pressure value fed back by the product is changed into a non-zero value according to the received pressure sensing signal, the mode adjusting signal output by the controller is a first mode adjusting signal, and the motor enters a torque control mode from a position control mode when receiving the first mode adjusting signal;

When the controller judges that the pressure value fed back by the product becomes zero according to the received pressure sensing signal, the mode adjusting signal output by the controller is a second mode adjusting signal, and the motor enters a position control mode from a torque control mode and reversely rotates to enter a jacking process when receiving the second mode adjusting signal.

9. The injection molding machine control method according to claim 7, comprising:

When the controller judges that the pressure value fed back by the product is zero according to the received pressure sensing signal, the controller controls the motor to be in a position control mode;

when the controller judges that the ejector pin is located in the first motion section, the controller controls the motor to drive the ejector pin to move in an accelerated mode; the distance from the surface of the product close to the thimble to the initial position of the end of the thimble provided with the pressure sensing device is a first distance, and the distance from the terminal point of the first motion section to the starting point of the first motion section is greater than half of the first distance and less than the first distance;

When the controller judges that the ejector pin is located in the second motion section, the controller controls the motor to drive the ejector pin to move in a speed reduction mode; the starting point of the second motion section is the terminal point of the first section, and the terminal point of the second motion section is the position of the surface of the product close to the thimble.

10. An injection molding machine comprising the injection molding machine control apparatus of any one of claims 1-6, further comprising a mold and an ejector embedded in the mold, the ejector being movable relative to the mold, the ejector being for releasing the article from the mold.

Technical Field

The embodiment of the invention relates to the field of injection molding, in particular to an injection molding machine control device, a control method thereof and an injection molding machine.

Background

The injection molding machine is generally provided with a mold, the mold is utilized to produce required products, the ejector pin device has the function of overcoming the adhesive force and the friction force between the products and a cavity type mold core of the mold in an injection molding system, the products are smoothly ejected out and fall, namely, the products are separated from the mold to be supplied for subsequent application, and the ejector pin is used as the last link in the molding process of the injection molding machine, and the quality of the products in the ejection process of the products is determined to a great extent by the ejector pin.

The currently adopted thimble motion control method only controls the position of the servo motor, and although the method can ensure that the thimble moves in place and successfully ejects the product, the whole control process is an open-loop control process, so that the quality of the product is difficult to ensure, marks are often left on the product, the attractiveness of the product is influenced, the product is even deformed, and the qualification rate of the product cannot be ensured.

Disclosure of Invention

In view of this, the embodiment of the invention provides an injection molding machine control device, a control method thereof and an injection molding machine, which form a complete closed-loop control process, improve the reliability of the control process of the injection molding machine, and are beneficial to improving the yield of injection molding products and the attractiveness of the products.

In a first aspect, an embodiment of the present invention provides a control device for an injection molding machine, including:

the pressure sensing device is fixed at one end of an ejector pin of the injection molding machine and used for generating a pressure sensing signal according to a pressure value fed back by a product;

The controller is electrically connected with the pressure sensing device and used for adjusting an output mode adjusting signal according to the received pressure sensing signal;

The motor is electrically connected with the controller, the ejector pin moves under the control of the motor, and the motor is used for adjusting a control mode of the ejector pin according to the received mode adjusting signal; wherein the control modes include a position control mode and a torque control mode.

Further, the injection molding machine control device further comprises:

The position sensing device is arranged on the surface of the product close to the thimble and used for detecting the position of one end of the thimble, provided with the pressure sensing device, and generating a position sensing signal;

The controller is electrically connected with the position sensing device and used for adjusting an output mode adjusting signal according to the received pressure sensing signal and the position sensing signal.

Further, the injection molding machine control device further comprises:

The input device is used for receiving the setting parameters input by the user and generating setting parameter signals.

Further, the setting parameter comprises a distance parameter, and the input device is used for generating a distance parameter signal; wherein the distance parameter comprises a distance from the surface of the product close to the thimble to an initial position of one end of the thimble where the pressure sensing device is arranged;

The controller is electrically connected with the input device and is used for adjusting the output speed adjusting signal according to the received distance parameter signal;

and the motor controls the moving speed of the thimble in the position control mode according to the received speed adjusting signal.

Further, the setting parameter comprises a characteristic parameter, and the input device is used for generating a characteristic parameter signal; wherein the characteristic parameter comprises a physical characteristic of the article;

The controller is electrically connected with the input device and is used for adjusting the output torque adjusting signal according to the received characteristic parameter signal and the pressure sensing signal;

The motor controls its own torque in the torque control mode according to the received torque adjustment signal.

further, the pressure sensing device is rigidly fixed at one end of an ejector pin of the injection molding machine.

in a second aspect, an embodiment of the present invention further provides a control method for an injection molding machine, including:

The pressure sensing device generates a pressure sensing signal according to the pressure value fed back by the product;

The controller adjusts the output mode adjusting signal according to the received pressure sensing signal;

the motor adjusts a control mode of an ejector pin of the injection molding machine according to the received mode adjusting signal; wherein the control modes include a position control mode and a torque control mode.

Further, the injection molding machine control method includes:

When the controller judges that the pressure value fed back by the product is changed into a non-zero value according to the received pressure sensing signal, the mode adjusting signal output by the controller is a first mode adjusting signal, and the motor enters a torque control mode from a position control mode when receiving the first mode adjusting signal;

when the controller judges that the pressure value fed back by the product becomes zero according to the received pressure sensing signal, the mode adjusting signal output by the controller is a second mode adjusting signal, and the motor enters a position control mode from a torque control mode and reversely rotates to enter a jacking process when receiving the second mode adjusting signal.

Further, the injection molding machine control method includes:

When the controller judges that the pressure value fed back by the product is zero according to the received pressure sensing signal, the controller controls the motor to be in a position control mode;

When the controller judges that the ejector pin is located in the first motion section, the controller controls the motor to drive the ejector pin to move in an accelerated mode; the distance from the surface of the product close to the thimble to the initial position of the end of the thimble provided with the pressure sensing device is a first distance, and the distance from the terminal point of the first motion section to the starting point of the first motion section is greater than half of the first distance and less than the first distance;

When the controller judges that the ejector pin is located in the second motion section, the controller controls the motor to drive the ejector pin to move in a speed reduction mode; the starting point of the second motion section is the terminal point of the first section, and the terminal point of the second motion section is the position of the surface of the product close to the thimble.

In a third aspect, an embodiment of the present invention further provides an injection molding machine, including the injection molding machine control device according to the first aspect, the injection molding machine further includes a mold and an ejector pin, the ejector pin is embedded in the mold, the ejector pin is movable relative to the mold, and the ejector pin is used for separating the product from the mold.

the embodiment of the invention provides an injection molding machine control device, a control method thereof and an injection molding machine. The controller is electrically connected with the pressure sensing device and adjusts the output mode adjusting signal according to the received pressure sensing signal. The motor is electrically connected with the controller, the thimble moves under the control of the motor, and the motor adjusts the control mode of the thimble according to the received mode adjusting signal; the control mode comprises a position control mode and a torque control mode, and thus, a complete closed-loop control process is formed in the control process of the ejector pin by utilizing the pressure sensing device, namely, the ejector pin can approach to a product in the process, the feedback control of the ejector pin is realized through the controller and the motor according to the pressure value fed back by the product, the reliability of the control process of the injection molding machine is improved, the problems that the product appearance is influenced and the product qualification rate cannot be guaranteed due to the open-loop control are avoided, the improvement of the yield of injection molding products is facilitated, and the attractiveness of the product is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present invention, the drawings needed to be used in the description of the embodiments or the background art will be briefly introduced below, and it is obvious that the drawings in the following description are schematic diagrams of some embodiments of the present invention, and for those skilled in the art, other solutions can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a control device of an injection molding machine according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an injection molding machine according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of another control apparatus for an injection molding machine according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart illustrating a method for controlling an injection molding machine according to an embodiment of the present invention;

fig. 5 is a schematic flow chart of a control method of an injection molding machine according to an embodiment of the present invention.

Detailed Description

the present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. Throughout this specification, the same or similar reference numbers refer to the same or similar structures, elements, or processes. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

the embodiment of the invention provides a control device of an injection molding machine, which comprises a pressure sensing device, a controller and a motor, wherein the pressure sensing device is fixed at one end of an ejector pin of the injection molding machine and used for generating a pressure sensing signal according to a pressure value fed back by a product. The controller is electrically connected with the pressure sensing device and adjusts the output mode adjusting signal according to the received pressure sensing signal. The motor is electrically connected with the controller, the thimble moves under the control of the motor, and the motor adjusts the control mode of the thimble according to the received mode adjusting signal; the control mode comprises a position control mode and a torque control mode.

the injection molding machine is generally provided with a mold, the mold is utilized to produce required products, the ejector pin device has the function of overcoming the adhesive force and the friction force between the products and a cavity type mold core of the mold in an injection molding system, the products are smoothly ejected out and fall, namely, the products are separated from the mold to be supplied for subsequent application, and the ejector pin is used as the last link in the molding process of the injection molding machine, and the quality of the products in the ejection process of the products is determined to a great extent by the ejector pin. The currently adopted thimble motion control method only controls the position of the servo motor, and although the method can ensure that the thimble moves in place and successfully ejects the product, the whole control process is an open-loop control process, so that the quality of the product is difficult to ensure, marks are often left on the product, the attractiveness of the product is influenced, the product is even deformed, and the qualification rate of the product cannot be ensured.

According to the embodiment of the invention, the pressure sensing device is utilized to enable the control process of the ejector pin to form a complete closed-loop control process, namely, the ejector pin can be subjected to feedback control through the controller and the motor according to the pressure value fed back by the product in the process that the ejector pin approaches the product, so that the reliability of the control process of the injection molding machine is improved, the problems that the product appearance is influenced and the product qualification rate cannot be ensured due to open-loop control are solved, the yield of the injection molding product is improved, and the attractiveness of the product is improved.

The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.

fig. 1 is a schematic structural diagram of an injection molding machine control device according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram of an injection molding machine according to an embodiment of the present invention. Referring to fig. 1 and 2, the control apparatus of the injection molding machine includes a pressure sensing device 1, a controller 2 (not shown in fig. 2), and a motor 3 (not shown in fig. 2), wherein the pressure sensing device 1 is fixed at one end of a thimble 4 of the injection molding machine, and the pressure sensing device 1 is configured to generate a pressure sensing signal according to a pressure value fed back by a product 7. The controller 2 is electrically connected with the pressure sensing device 1, and the controller 2 adjusts the output mode adjusting signal according to the received pressure sensing signal. The motor 3 is electrically connected with the controller 2, the thimble 4 moves under the control of the motor 3, and the motor 3 adjusts the control mode of the thimble 4 according to the received mode adjusting signal, wherein the control mode comprises a position control mode and a torque control mode.

Specifically, with reference to fig. 1 and 2, the pressure sensing device 1 is fixed to one end of a thimble 4 of the injection molding machine, the thimble 4 is embedded in a mold 8, and the thimble 4 is movable relative to the mold 8, fig. 2 exemplarily shows two thimbles, one end of each thimble is provided with the pressure sensing device 1, when the product 7 needs to be separated from the mold 8, the thimble 4 moves along a horizontal direction a to eject the product 7 so as to slide the product 7, one side of the pressure sensing device 1, which is far away from the product 7, is used for fixing, and one side of the pressure sensing device 1, which is close to the product 7, is used for sensing the pressure fed back by the product 7. When the thimble 4 is in the moving process, before the pressure sensing device 1 is not in contact with the product 7, the pressure value fed back by the product 7 detected by the pressure sensing device 1 is always zero, and when the pressure sensing device 1 is in contact with the product 7 and further moves towards the direction adjacent to the product 7, the pressure value fed back by the product 7 detected by the pressure sensing device 1 is no longer zero, and the closer the pressure sensing device 1 is to the product 7 under the driving of the thimble 4, the larger the pressure value fed back by the product 7 detected by the pressure sensing device 1 is. Illustratively, the pressure sensing device 1 may include a pressure sensor, and preferably, the pressure sensor may be configured as a button-type pressure sensor to match the size of the ejector pin 4 in the injection molding machine.

the controller 2 is electrically connected with the pressure sensing device 1, the pressure sensing device 1 transmits a pressure sensing signal to the controller 2, the controller 2 adjusts an output mode adjusting signal according to the received pressure sensing signal, the motor 3 is electrically connected with the controller 2, the thimble 4 moves under the control of the motor 3, the motor 3 adjusts a control mode of the thimble 4 according to the received mode adjusting signal, and the motor 3 can be a servo motor 3, for example. When the controller 2 judges that the pressure value fed back by the product 7 is zero according to the pressure sensing signal fed back by the pressure sensing device 1, it can be judged that the pressure sensing device 1 is not contacted with the product 7, and at the moment, the controller 2 can control the motor 3 to enter a position control mode, namely only control the motor 3 to adjust the moving speed of the thimble 4. When the controller 2 judges that the pressure value fed back by the product 7 is changed from zero to a non-zero value according to the pressure sensing signal fed back by the pressure sensing device 1, it can be judged that the pressure sensing device 1 just contacts the product 7, at this time, the controller 2 can control the motor 3 to enter a torque control mode, that is, only the torque of the motor 3 is controlled, and the torque of the motor 3 represents the thrust of the motor 3 to the thimble 4.

For example, in the process that the pressure sensing device 1 is in contact with the product 7 and is continuously close to the product 7, and the controller 2 determines that the pressure value fed back by the product 7 is continuously increased through the pressure sensing signal, the motor 3 in the torque control mode can be adjusted to increase the torque so as to provide sufficient thrust for the product 7, so that the product 7 can move and fall off in the direction away from the mold 8, the torque of the motor 3 in the torque control mode can be controlled and adjusted not to be too large, and the quality and the attractiveness of the product 7 are prevented from being affected by the excessive thrust. In addition, after the product 7 falls off the mold 8, the controller 2 may determine that the pressure value fed back by the product 7 becomes zero again according to the received pressure sensing signal, and then the controller 2 may control the electrode to switch to the position control mode and may control the motor 3 to rotate reversely to enter the ejection process, even if the ejector pin 4 returns to the initial position before operation.

Like this, utilize pressure-sensitive device 1 to make the control process to thimble 4 form complete closed-loop control process, can be close the in-process of goods 7 at thimble 4 promptly, according to the pressure value of goods 7 feedback and realize the feedback control to thimble 4 through controller 2 and motor 3, and can design the closed-loop control algorithm according to the pressure feedback value, thereby realize the control to servo motor 3's torque, the reliability to the control process of injection molding machine has been improved, the problem that influence product that open-loop control leads to is pleasing to the eye and can't guarantee the product qualification rate is avoided, be favorable to improving the yield of injection molding product, promote the pleasing to the eye degree of product.

Fig. 3 is a schematic structural diagram of another injection molding machine control device according to an embodiment of the present invention, and based on fig. 1 and the injection molding machine control device with the structure shown in fig. 3, the injection molding machine control device with the structure shown in fig. 3 may further include a position sensing device 5 (not shown in fig. 2), the position sensing device 5 is disposed on a surface of the product 7 adjacent to the thimble 4, and the position sensing device 5 is configured to detect a position of an end of the thimble 4 where the pressure sensing device 1 is disposed and generate a position sensing signal. The controller 2 is electrically connected to the position sensing device 5, and the controller 2 adjusts the output mode adjustment signal according to the received pressure sensing signal and the position sensing signal.

Specifically, with reference to fig. 1 to 3, the position sensing device 5 is disposed on the surface of the product 7 close to the thimble 4, the position sensing device 5 is used to detect the position of the end of the thimble 4 where the pressure sensing device 1 is disposed and generate a position sensing signal, the position sensing device 5 may be, for example, a limit switch, the position sensing device 5 disposed on the surface of the product 7 close to the thimble 4 means that the position sensing device 5 is tightly attached to the surface of the product 7 close to the thimble 4, the position sensing device 5 may be disposed at the position where the end of the thimble 4 where the pressure sensing device 1 is disposed reaches the surface of the product 7 close to the thimble 4, that is, the position sensing signal generated when the pressure sensing device 1 contacts the product 7, and the position sensing device 5 does not reach the position where the end of the product 4 where the pressure sensing device 1 is disposed, that is not contacted with the product 7, that is, that the level of the position sensing signal generated when Different.

Controller 2 is connected with position sensing device 5 electricity, controller 2 adjusts the mode regulation signal of output according to received pressure-sensitive signal and position sensing signal, controller 2 both can judge the node that pressure-sensitive device 1 and goods 7 contacted according to the pressure value of goods 7 feedback, can utilize position sensing device 5 to judge again whether the one end that thimble 4 is provided with pressure-sensitive device reaches the position that goods 7 closes on the surface of thimble 4, can judge the node that pressure-sensitive device 1 and goods 7 contacted equally promptly, and then switch motor 3's control mode, the accuracy of controller 2 to the control process of motor 3 mode switching has been improved.

Alternatively, referring to fig. 1 to 3, on the basis of the injection molding machine control device of fig. 1 and the structure shown, the injection molding machine control device of the structure shown in fig. 3 may further include an input device 6 (not shown in fig. 2), wherein the input device 6 is used for receiving a setting parameter input by a user and generating a setting parameter signal. Alternatively, the setting parameter may comprise a distance parameter, and the input device 6 is configured to generate a distance parameter signal, the distance parameter comprising a distance from the surface of the product 7 adjacent to the thimble 4 to an initial position a0 of the end of the thimble 4 where the pressure-sensitive device 1 is disposed. The controller 2 is electrically connected with the input device 6, the controller 2 adjusts the output speed adjusting signal according to the received distance parameter signal, and the motor 3 controls the moving speed of the thimble 4 in the position control mode according to the received speed adjusting signal.

Specifically, the input device 6 may be an input device such as a touch panel provided on the injection molding machine, and the user may input, through the input device 6, a distance L1 from the surface of the product 7 adjacent to the ejector pin 4 to an initial position a0 of the end of the ejector pin 4 provided with the pressure sensing device 1, the initial position a0 of the end of the ejector pin 4 provided with the pressure sensing device 1, that is, a position of the ejector pin 4 before starting to move in a direction adjacent to the product 7, and the distance L1 is also a distance to be moved by the product 7 from starting to just contacting the product 7.

the controller 2 is electrically connected with the input device 6, the controller 2 can acquire information of the distance L1 according to the received distance parameter signal, further can perform calculation to acquire information of the distance L1 which is one-half of the distance, the controller 2 adjusts the output speed adjusting signal according to the received distance parameter signal, and the motor 3 controls the moving speed of the thimble 4 in the position control mode according to the received speed adjusting signal. For example, the controller 2 may be configured to control the thimble 4 to move from the initial position a0 to the point a in an accelerated manner under the driving of the motor 3, where the point a is located between the distance L1 and the distance L1 that are half times, that is, the front most period in the distance L1 is controlled, and the moving speed of the thimble 4 is increased to ensure that the thimble 4 can reach the point a quickly, so as to improve the working efficiency of the injection molding machine control device in the process of dropping the product 7. In addition, the controller 2 may be configured to control the thimble 4 to move at a decreasing speed in a movement section remaining after the point a, that is, a movement section from the point a to a surface of the product 7 close to the thimble 4, that is, a rear time period within the control distance L1, under the driving of the motor 3, so as to prevent the thimble 4 from contacting the product 7 at a higher speed and affecting the quality or the aesthetic quality of the product 7.

With reference to fig. 1 to 3, the injection molding machine control device may further include an input device 6, where the input device 6 is configured to receive a setting parameter input by a user and generate a setting parameter signal. Optionally, the setting parameter comprises a characteristic parameter, and the input means 6 is adapted to generate a characteristic parameter signal, the characteristic parameter comprising a physical characteristic of the article 7. The controller 2 is electrically connected with the input device 6, the controller 2 adjusts the output torque adjusting signal according to the received characteristic parameter signal and the pressure sensing signal, and the motor 3 controls the torque of the motor in a torque control mode according to the received torque adjusting signal.

Specifically, the input device 6 may be, for example, an input device 6 such as a touch screen provided on the injection molding machine, and the user may input physical characteristics of the product 7, such as physical parameters of the density and specific volume of the product 7, through the input device 6. The controller 2 is electrically connected with the input device 6, the controller 2 can adjust the output torque adjusting signal according to the received characteristic parameter signal and the pressure sensing signal, and the motor 3 controls the torque of the motor in a torque control mode according to the received torque adjusting signal.

For example, in the process that the pressure sensing device 1 is in contact with the product 7 and is continuously close to the product 7, that is, when the motor 3 is in the torque control mode, the controller 2 determines that the pressure value fed back by the product 7 is continuously increased through the pressure sensing signal, and determines that the hardness of the product 7 is higher through the characteristic parameter signal, the motor 3 in the torque control mode may be adjusted to increase the torque so as to provide a sufficient thrust to the product 7, and ensure that the product 7 can move and fall off in the direction a away from the mold 8 without damaging the surface of the product 7. Or the controller 2 judges that the pressure value fed back by the product 7 is continuously increased through the pressure sensing signal, when the hardness of the product 7 is judged to be low through the characteristic parameter signal, the motor 3 in the torque control mode can be adjusted to increase the torque to provide enough thrust for the product 7 so as to ensure that the product 7 can move and fall off along the direction far away from the mold 8, but the increased torque can be smaller than the torque applied when the hardness of the corresponding product 7 is high, so that the damage to the surface of the product 7 is avoided. Therefore, the torque of the motor 3 can be adjusted in a self-adaptive manner according to different characteristics of the product 7, and then the control algorithm of the movement of the thimble 4 is adjusted, so that the intelligent control of the injection molding machine is realized.

Alternatively, the pressure sensing device 1 may be rigidly fixed to one end of the ejector pin 4 of the injection molding machine, for example, the pressure sensing device 1 may be fixedly connected to one end of the ejector pin 4 of the injection molding machine, which is close to the product 7, through a rigid and rigid mechanical element 9, so as to improve the accuracy of the pressure sensing device 1 in detecting the feedback pressure value. It should be noted that, in the embodiment of the present invention, the specific form of the rigid mechanical element 9 is not limited, and it is sufficient to ensure that the pressure sensing device 1 can be rigidly fixed to one end of the thimble 4 of the injection molding machine by the rigid mechanical element 9.

it should be noted that the drawings of the embodiments of the present invention only show the sizes of the components by way of example, and do not represent the actual sizes of the components in the injection molding machine.

An embodiment of the present invention further provides an injection molding machine control method, fig. 4 is a schematic flow chart of the injection molding machine control method provided in the embodiment of the present invention, and the injection molding machine control method can be executed by the injection molding machine control device provided in the embodiment, as shown in fig. 4, and the injection molding machine control method includes:

And S110, generating a pressure sensing signal by the pressure sensing device according to the pressure value fed back by the product.

And S120, the controller adjusts the output mode adjusting signal according to the received pressure sensing signal.

s130, the motor adjusts a control mode of an ejector pin of the injection molding machine according to the received mode adjusting signal; the control mode comprises a position control mode and a torque control mode.

Alternatively, referring to fig. 1 to 4, when the controller 2 determines that the pressure value fed back by the product 7 becomes a non-zero value according to the received pressure sensing signal, the mode adjusting signal output by the controller 2 is the first mode adjusting signal, and the motor 3 enters the torque control mode from the position control mode when receiving the first mode adjusting signal. When the controller 2 judges that the pressure value fed back by the product 7 becomes zero according to the received pressure sensing signal, the mode adjusting signal output by the controller 2 is a second mode adjusting signal, and the motor 3 enters the position control mode from the torque control mode and reversely rotates to enter the jacking process when receiving the second mode adjusting signal.

alternatively, with reference to fig. 1 to 4, when the controller 2 determines that the pressure value fed back by the product 7 is zero according to the received pressure sensing signal, the controller 2 controls the motor 3 to be in the position control mode. When the controller 2 judges that the thimble 4 is located in the first motion section, namely, the motion section between a0 and a, the controller 2 controls the motor 3 to drive the thimble 4 to move in an accelerated manner, the starting point of the first motion section is an initial position a0 of one end of the thimble 4 where the pressure sensing device 1 is arranged, the distance from the surface of the product 7 close to the thimble 4 to an initial position a0 of one end of the thimble 4 where the pressure sensing device 1 is arranged is a first distance, and the distance from the end point of the first motion section to the starting point of the first motion section is greater than half of the first distance and smaller than the first distance, so that the thimble 4 can reach the point a quickly, and the working efficiency of the injection molding machine control device in the falling process of the product 7 is improved. When the controller 2 judges that the thimble 4 is positioned in the second motion section, namely the motion section from A to the position where the product 7 is close to the surface of the thimble 4, the controller 2 controls the motor 3 to drive the thimble 4 to move in a speed reduction way; the starting point of the second moving section is the end point A of the first section, and the end point of the second moving section is the position where the surface of the product 7 is close to the ejector pin 4, so that the ejector pin 4 is prevented from contacting the product 7 at a high speed, and the quality or the attractiveness of the product 7 is prevented from being influenced.

According to the embodiment of the invention, the pressure sensing device is utilized to enable the control process of the ejector pin to form a complete closed-loop control process, namely, the ejector pin can be subjected to feedback control through the controller and the motor according to the pressure value fed back by the product in the process that the ejector pin approaches the product, so that the reliability of the control process of the injection molding machine is improved, the problems that the product appearance is influenced and the product qualification rate cannot be ensured due to open-loop control are solved, the yield of the injection molding product is improved, and the attractiveness of the product is improved.

Fig. 5 is a schematic flow chart of a control method of an injection molding machine according to an embodiment of the present invention. As shown in fig. 5, the molding machine control method includes:

And S210, starting a program.

S220, setting parameters at the interface end according to the product types.

Before the injection machine begins to process the product, the physical parameters of the relevant product, such as density, specific volume and the like, are input in a control interface and are used for calculating a control algorithm.

and S230, operating the servo motor in a position control mode.

when the product is manufactured and the mold is opened in place, the ejector pin starts to move, firstly, the ejector pin moves in a position control mode, and the position control mode is maintained before the pressure sensing device contacts the product.

s240, judging whether the thimble contacts the product or not according to the feedback of the pressure sensor; if yes, go to step S250, otherwise, go to step S230.

s250, the servo motor is switched to a torque control mode,

S260, judging whether pressure feedback exists or not again; if yes, go to S250; if not, go to step S270.

s270, returning the ejector pin.

and after the ejector retreats, the ejector pin performs the reciprocating motion.

the embodiment of the invention also provides an injection molding machine, which comprises the injection molding machine control device in any embodiment, so that the injection molding machine provided by the embodiment of the invention also has the beneficial effects, and the detailed description is omitted. As shown in fig. 2, the injection molding machine further includes a mold 8 and a pin 4, the pin 4 being embedded in the mold 8, the pin 4 being movable relative to the mold 8, the pin 4 being for releasing the product 7 from the mold 8.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.