A locking mechanism for mechanical mold closing

Abstract

This invention relates to the field of locking mechanism technology, specifically a locking mechanism for mechanical mold closing, comprising a support mechanism: the support mechanism includes a mechanism housing, on the inner wall of which a guide rod is slidably mounted; a mold-locking mechanism: the mold-locking mechanism is disposed on the guide rod; a power mechanism: the power mechanism is disposed on the mechanism housing to provide power for the operation of the mold-locking mechanism; and a pressurizing mechanism: the pressurizing mechanism is disposed at the end of the power mechanism away from the mold-locking mechanism to provide power for the operation of the mold-locking mechanism. This mechanical mold-locking mechanism, by providing a pressurizing mechanism on one side of the power mechanism, can reduce the workload and energy consumption of the power mechanism, avoiding problems such as overheating and overload during operation. By adjusting the pressure value in the pressurizing mechanism, the load can be effectively distributed, thus allowing it to be used in conjunction with power mechanisms of different power levels, making it highly adaptable.

Description

Technical Field

[0001] This invention relates to the field of locking mechanism technology, specifically a locking mechanism for mechanical mold closing. Background Technology

[0002] In the production process of existing molded products, the molten material inside the mold cavity exerts an expansion force on the mold; the larger the molten material, the greater the expansion force. Therefore, when the mold closes, a locking mechanism is needed to increase the locking force. Currently, there are two main operating modes for locking mechanisms: one is to use a motor to provide torque and cooperate with a crank arm to drive the locking platen to move, thereby locking the mold; the other is to use a hydraulic cylinder or other device to directly provide axial force to drive the locking platen to move. Both methods have certain drawbacks.

[0003] First, motors have high power consumption and high losses during operation. Providing continuous clamping force via a motor can easily lead to overheating and overload, thus affecting the motor's control accuracy and lifespan. Second, directly moving the clamping platen via a hydraulic cylinder is problematic because the high temperatures generated during mold operation cause changes in the internal pressure of the cylinder, affecting the accuracy and safety of cylinder control. Furthermore, hydraulic cylinder drives also suffer from excessive load. Currently, this is generally overcome by using multiple cylinders; however, when multiple cylinders are used in conjunction, it is difficult to ensure synchronized oil injection speeds, which can easily lead to structural deformation and damage, affecting the clamping force. Therefore, we propose a mechanical clamping mechanism for mold closing. Summary of the Invention

[0004] The purpose of this invention is to provide a locking mechanism for mechanical mold closing, which solves the problems in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A locking mechanism for mechanical mold closing includes a support mechanism: the support mechanism includes a mechanism housing, on the inner wall of the mechanism housing, a guide rod is slidably mounted; a mold locking mechanism: the mold locking mechanism is disposed on the guide rod; a power mechanism: the power mechanism is disposed on the mechanism housing, for providing power for the operation of the mold locking mechanism; and a pressurizing mechanism: the pressurizing mechanism is disposed at the end of the power mechanism away from the mold locking mechanism, for providing power for the operation of the mold locking mechanism.

[0007] Preferably, the mold-locking mechanism includes a first template and a second template, the first template being fixedly mounted on the guide rod, and the second template being slidably mounted on the guide rod.

[0008] Preferably, the power mechanism includes a drive shaft, which is rotatably mounted on the mechanism box. A rotating seat is fixedly mounted on the surface of the drive shaft. A first hinge arm is hinged to the rotating seat. A fixed seat is hinged to the end of the first hinge arm away from the rotating seat. The fixed seat is fixedly mounted on the side of the second template away from the first template.

[0009] Preferably, the drive shaft is perpendicular to the guide rod, and a servo motor is fixedly mounted on one end of the drive shaft.

[0010] Preferably, the pressurizing mechanism includes a pressurizing cylinder assembly, a connecting seat is fixedly installed on one end of the pressurizing cylinder assembly, a second hinge arm is hinged on the connecting seat, and the end of the second hinge arm away from the connecting seat is hinged to the rotating seat.

[0011] Preferably, the pressurizing mechanism further includes a counterweight plate, which is fixedly mounted on the guide rod;

[0012] The pressurizing cylinder assembly includes a pressurizing cylinder barrel located on the side of the counterweight plate near the mold-locking mechanism. The side of the pressurizing cylinder barrel away from the counterweight plate is fixedly connected to a connecting seat. A pressurizing shaft is connected to a piston on the inner wall of the pressurizing cylinder barrel. The end of the pressurizing shaft away from the pressurizing cylinder barrel passes through the counterweight plate and is equipped with an electric lead screw.

[0013] Preferably, one end of the pressure shaft is elastically connected to the inner wall of the pressure cylinder via a spring.

[0014] Preferably, both ends of the guide rod pass through the mechanism box, and there are multiple guide rods distributed at equal distances between them.

[0015] Preferably, it also includes a mold transfer base frame, on which a linear guide rail is fixedly installed, and a slide plate is slidably installed on the linear guide rail. The side of the slide plate away from the linear guide rail is fixedly connected to the mechanism box.

[0016] Preferably, the system also includes a controller, which is electrically connected to both the servo motor and the pressurization cylinder assembly.

[0017] By employing the above technical solution, the present invention provides a locking mechanism for mechanical mold closing. It possesses at least the following beneficial effects:

[0018] (1) The locking mechanism for mechanical mold closing can reduce the working load and energy consumption of the power mechanism by setting a pressure mechanism on one side of the power mechanism, and avoid problems such as overheating and overload during the operation of the power mechanism, thereby ensuring the control accuracy and service life of the power mechanism. By adjusting the pressure value in the pressure mechanism, the load can be effectively distributed, so it can be used in conjunction with power mechanisms of different power, and has high applicability.

[0019] (2) The locking mechanism for the mechanical mold closing uses two different driving methods, a servo motor and a pressure cylinder, to overcome the inherent defects of the existing single-type drive mechanism, such as high wear, high cost, insufficient accuracy and locking force, thereby reducing production costs and improving the service life and stability of the machine.

[0020] (3) The locking mechanism for mechanical mold closing, by setting the guide rod and the counterweight plate together, enables the first template and the second template to move synchronously in opposite directions, thereby effectively shortening the motion stroke of the mold closing process and improving the mold closing efficiency. In addition, the counterweight plate and the mold closing mechanism are set on both sides of the mechanism box, which can alleviate the problem of device center offset to a certain extent and improve the stability of the device.

[0021] (4) The mechanical mold clamping locking mechanism, by setting a controller, can accurately control the servo motor and pressure cylinder assembly, provide appropriate pressure for mold clamping, ensure the stability of mechanical locking, prevent mechanical damage, and effectively distribute the load to prevent excessive load on the servo motor, thus ensuring the service life of the structure. Attached Figure Description

[0022] The accompanying drawings, which are provided to further illustrate the invention, constitute a part of this application:

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the mold-locking mechanism in this invention;

[0025] Figure 3 This is a schematic diagram of the pressurization mechanism in this invention;

[0026] Figure 4 This is a schematic diagram of the power mechanism in this invention;

[0027] Figure 5 This is a cross-sectional view of the pressurization cylinder assembly in this invention;

[0028] Figure 6 This is a schematic diagram of the electrical control principle of the present invention.

[0029] In the diagram: 1. Support mechanism; 101. Mechanism box; 102. Guide rod; 2. Mold transfer base frame; 3. Mold locking mechanism; 301. First template; 302. Second template; 4. Power mechanism; 401. Servo motor; 402. Drive shaft; 403. Rotating seat; 404. First hinge arm; 405. Fixed seat; 5. Pressurizing mechanism; 501. Pressurizing cylinder assembly; 5011. Pressurizing cylinder barrel; 5012. Pressurizing shaft; 5013. Spring; 5014. Support rod; 5015. Electric lead screw; 502. Connecting seat; 503. Second hinge arm; 504. Counterweight plate; 6. Linear guide rail; 7. Slide plate. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0031] Please see Figures 1-6 The present invention provides a technical solution:

[0032] A locking mechanism for mechanical mold closing includes a mold-moving base frame 2. Two linear guide rails 6 are fixedly mounted on the mold-moving base frame 2, and slide plates 7 are slidably mounted on each of the two linear guide rails 6. A support mechanism 1 is provided on the top of the two slide plates 7. The support mechanism 1 is equipped with a mold-locking mechanism 3, a power mechanism 4, and a pressurizing mechanism 5. Through the cooperation of the linear guide rails 6 and the slide plates 7, the support mechanism 1 can be driven to move linearly, thereby adjusting the position of the mold-locking mechanism 3.

[0033] Specifically, the support mechanism 1 includes a mechanism box 101, the bottom of which is fixedly connected to the top of two sliding plates 7. Guide rods 102 are slidably mounted on the inner wall of the mechanism box 101, with both ends of the guide rods 102 penetrating the mechanism box 101. The mold-locking mechanism 3 and the pressure-applying mechanism 5 are respectively disposed on the guide rods 102 on both sides of the mechanism box 101. There are three guide rods 102, which are evenly distributed and form an inverted triangle, thereby ensuring the stability of the mold-locking mechanism 3 and the pressure-applying mechanism 5 during operation.

[0034] In this embodiment, the mold locking mechanism 3 includes a first template 301 and a second template 302. The first template 301 is fixedly installed on the guide rod 102, and the second template 302 is slidably installed on the guide rod 102. A left mold and a right mold are provided on the side of the first template 301 close to the second template 302. After the left mold and the right mold are fitted together, a mold cavity is formed. Through the relative movement of the first template 301 and the second template 302, the left mold and the right mold can be locked.

[0035] The power mechanism 4 provides power for the operation of the mold-locking mechanism 3. Specifically, the power mechanism 4 includes a drive shaft 402, which is rotatably mounted on the top of the mechanism housing 101. A rotating seat 403 is fixedly mounted on the surface of the drive shaft 402. A first hinge arm 404 is hinged to the rotating seat 403. A fixed seat 405 is hinged to the end of the first hinge arm 404 away from the rotating seat 403. The fixed seat 405 is fixedly mounted on the side of the second template 302 away from the first template 301. The drive shaft 402 is perpendicular to the guide rod 102. A servo motor 401 is fixedly mounted on one end of the drive shaft 402. A support frame is fixedly mounted on the top of the mechanism housing 101. The servo motor 401 is fixedly mounted on the support frame. In use, the servo motor 401 drives the drive shaft 402 to rotate, which in turn drives the rotating seat 403 to rotate. The rotating seat 403, through the first hinge arm 404, drives the second template 302 to move axially along the guide rod 102, thereby enabling mold locking.

[0036] Mold locking is achieved solely by driving the second template 302 to move using the servo motor 401. This method results in high energy consumption and heavy load on the motor, easily leading to overheating and overload issues for the servo motor 401, reducing its control accuracy and lifespan. Therefore, this technical solution incorporates a pressurizing mechanism 5 to increase the driving force of the power mechanism 4, thereby reducing the load on the servo motor 401. Simultaneously, it also reduces the travel distance of the second template 302 during mold locking, further lowering energy consumption. Specifically, the pressurizing mechanism 5 includes a pressurizing cylinder assembly 501. A connecting seat 502 is fixedly mounted on one end of the pressurizing cylinder assembly 501, and a second hinge arm 503 is hinged to the connecting seat 502. The end of the second hinge arm 503 away from the connecting seat 502 is hinged to the rotating seat 403. The pressurizing mechanism 5 also includes a counterweight plate 504, which is fixedly mounted on the guide rod 102. The second hinge arm 503 and the first hinge arm 404 are centrally symmetrically distributed about the axis of the drive shaft 402. When the servo motor 401 drives the drive shaft 402 to rotate, the second hinge arm 503 can move synchronously with the first hinge arm 404, thereby causing the counterweight plate 504 and the second template 302 to move synchronously in opposite directions. Since the second template 302 is slidably mounted on the guide rod 102, and the counterweight plate 504 is fixedly mounted on the guide rod 102, the counterweight plate 504 will drive the first template 301 to move synchronously through the guide rod 102 during this process, causing the first template 301 and the second template 302 to move relative to each other, reducing the stroke required for the mold-locking process. In order to improve the overall stability of the equipment, the material and size of the counterweight plate 504 need to be set according to the weight of the mold-locking mechanism 3 on the left side of the mechanism box 101, so that the force on the left and right sides of the mechanism box 101 is balanced, ensuring the stability of the equipment during operation.

[0037] In addition, the pressure cylinder assembly 501 includes a pressure cylinder 5011, which is located on the side of the counterweight plate 504 near the mold-locking mechanism 3. The side of the pressure cylinder 5011 away from the counterweight plate 504 is fixedly connected to the connecting seat 502. A pressure shaft 5012 is piston-connected to the inner wall of the pressure cylinder 5011. The end of the pressure shaft 5012 away from the pressure cylinder 5011 passes through the counterweight plate 504 and is equipped with an electric lead screw 5015. The electric lead screw 5015 is controlled by a motor and works in conjunction with a gear reducer to adjust the pressure of the pressure cylinder, thereby increasing the pressure on the servo motor 401 according to actual needs and reducing the load on the servo motor 401. A support rod 5014 is fixedly installed between the electric lead screw 5015 and the pressure shaft 5012 to improve the stability of the structure. One end of the pressure shaft 5012 is elastically connected to the inner wall of the pressure cylinder 5011 via a spring 5013. The spring 5013 drives the pressure shaft 5012 to move in the opposite direction, which can reduce the load on the pressure cylinder and further reduce energy consumption.

[0038] like Figure 6 As shown, it also includes a controller and a pressure sensor. The controller is electrically connected to the servo motor 401, the pressurization cylinder assembly 501 and the pressure sensor, respectively.

[0039] When the mechanical mold clamping locking mechanism of the present invention is in use, the controller sends a working signal to the servo driver through point A. The servo driver drives the servo motor 401 to push the second template 302 to move through the first hinge arm 404 in torque mode. After the servo motor 401 works to the preset torque value, the servo driver sends a torque arrival signal B to the controller PLC. After the PLC receives the signal B, point A stops working and the controller sends a signal C to the pressure cylinder assembly 501. After receiving the signal C, the pressure cylinder assembly 501 works to push the template to apply pressure a second time. The pressure cylinder continues to work until the pressure inside the cylinder reaches the preset value of the pressure switch and then stops outputting. After the pressure switch reaches the preset value, it sends a torque arrival signal D to the controller PLC and holds it. After the controller receives the signal D, it performs other operations.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A locking mechanism for mechanical mold closing, characterized in that: include Support mechanism (1): The support mechanism (1) includes a mechanism box (101), and a guide rod (102) is slidably installed on the inner wall of the mechanism box (101). Mold locking mechanism (3): The mold locking mechanism (3) is disposed on the guide rod (102); Power mechanism (4): The power mechanism (4) is set on the mechanism box (101) to provide power for the operation of the mold locking mechanism (3). The power mechanism (4) includes a drive shaft (402), which is rotatably mounted on the mechanism box (101). A rotating seat (403) is fixedly mounted on the surface of the drive shaft (402). Pressurizing mechanism (5): The pressurizing mechanism (5) is located at one end of the power mechanism (4) away from the mold-locking mechanism (3) to provide power for the operation of the mold-locking mechanism (3); The pressurizing mechanism (5) includes a pressurizing cylinder assembly (501), a connecting seat (502) is fixedly installed on one end of the pressurizing cylinder assembly (501), a second hinge arm (503) is hinged on the connecting seat (502), and the end of the second hinge arm (503) away from the connecting seat (502) is hinged to the rotating seat (403); the pressurizing mechanism (5) also includes a counterweight plate (504), the counterweight plate (504) is fixedly installed on the guide rod (102); the pressurizing cylinder assembly (501) includes a pressurizing cylinder barrel (5011), the pressurizing cylinder barrel (5011) is fixedly installed on the guide rod (102), and the pressurizing cylinder assembly (501) includes a pressurizing cylinder barrel (5011), the pressurizing cylinder barrel (5011) is fixedly installed on the connecting seat (502), and the second hinge arm (503) is hinged to the rotating seat (403) at one end of the connecting seat (502); the pressurizing mechanism (501) also includes a counterweight plate (504), the counterweight plate (504) is fixedly installed on the guide rod (102); the pressurizing cylinder assembly (501) includes a pressurizing cylinder barrel (5011), the pressurizing cylinder barrel (5011) is fixedly installed on the connecting seat (502), the second hinge arm (503) is hinged to the rotating seat (403) at one end of ... 11) The side of the counterweight plate (504) near the mold-locking mechanism (3) is located on the side of the pressure cylinder (5011) away from the counterweight plate (504) and is fixedly connected to the connecting seat (502). The piston on the inner wall of the pressure cylinder (5011) is connected to the pressure shaft (5012). The end of the pressure shaft (5012) away from the pressure cylinder (5011) passes through the counterweight plate (504) and is provided with an electric lead screw (5015). One end of the pressure shaft (5012) is elastically connected to the inner wall of the pressure cylinder (5011) through a spring (5013).

2. The locking mechanism for mechanical mold closing according to claim 1, characterized in that: The mold-locking mechanism (3) includes a first template (301) and a second template (302). The first template (301) is fixedly installed on the guide rod (102), and the second template (302) is slidably installed on the guide rod (102).

3. The locking mechanism for mechanical mold closing according to claim 2, characterized in that: A first hinge arm (404) is hinged to the rotating seat (403), and a fixed seat (405) is hinged to one end of the first hinge arm (404) away from the rotating seat (403). The fixed seat (405) is fixedly installed on the side of the second template (302) away from the first template (301).

4. The locking mechanism for mechanical mold closing according to claim 3, characterized in that: The drive shaft (402) is perpendicular to the guide rod (102), and a servo motor (401) is fixedly installed at one end of the drive shaft (402).

5. The locking mechanism for mechanical mold closing according to claim 1, characterized in that: Both ends of the guide rod (102) pass through the mechanism box (101), and there are multiple guide rods (102) that are distributed at equal distances.

6. The locking mechanism for mechanical mold closing according to claim 1, characterized in that: It also includes a mold transfer base frame (2), on which a linear guide rail (6) is fixedly installed, and a slide plate (7) is slidably installed on the linear guide rail (6). The side of the slide plate (7) away from the linear guide rail (6) is fixedly connected to the mechanism box (101).

7. The locking mechanism for mechanical mold closing according to claim 4, characterized in that: It also includes a controller, which is electrically connected to the servo motor (401) and the pressurization cylinder assembly (501), respectively.

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