Automatic mold release mechanism

Abstract

The utility model discloses automatic die cutting mechanism belongs to die cutting equipment technical field, aims at solving the problem of unstable, low precision of upper cutter die movement, including guide rail bottom plate, lower die cutter and upper die cutter, sets up the upper cutter die guide pillar, and the upper die cutter slides and is equipped on it, and the guide rail bottom plate is fixed with first and second linear guide rails in parallel, and the upper die cutter top is fixed with linear guide rail connecting plate, and the both ends of the connecting plate are slidably connected with double guide rails, form composite guide, and the upper cutter die pre -compression spring is covered on the guide pillar, and the pre -compression force is applied to the upper die cutter. The utility model discloses through composite guide structure to ensure the accuracy and stability of upper die cutter movement, and simultaneously utilize pre -compression spring compensation tool wear, eliminate the clearance, and the cutting quality has been improved significantly and has prolonged the service life of cutter die.

Description

Technical Field

[0001] This utility model relates to the field of die-cutting equipment technology, and in particular to an automatic die-cutting mechanism. Background Technology

[0002] Automatic die-cutting mechanisms are key pieces of equipment widely used in industrial production for processing sheet or roll materials such as kraft paper, PE film, and plastics. They typically use a transmission mechanism to drive an upper die in a periodic reciprocating linear motion, working in conjunction with a fixed lower die to achieve automated, continuous die-cutting of materials.

[0003] The high-speed reciprocating motion of the upper die is a prerequisite for efficient production. However, the cutting action itself generates impact force and uneven lateral force on the upper die. Therefore, the accuracy and stability of the upper die's motion trajectory directly determine the cutting precision and edge quality of the final product. To guide and support the movement of the upper die, existing technologies typically incorporate guide structures.

[0004] However, existing automatic die-cutting mechanisms have relatively simple guiding structures, such as using only a single guide post or ordinary slide rails with large gaps. Under high-speed, high-load continuous operation, this single or insufficiently precise guiding method cannot completely suppress the slight wobbling or wobble of the upper die caused by uneven force. This instability in motion is directly transmitted to the cutting edge, causing deviations in the cutting position, affecting the consistency of product dimensions, and even accelerating abnormal wear of the die, thus reducing the overall processing quality and reliability.

[0005] Therefore, this utility model proposes an automatic die-cutting mechanism to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above deficiencies, this utility model provides an automatic die-cutting mechanism, which aims to improve the problems in the prior art, such as low motion accuracy of the upper die leading to unstable cutting quality, and the inability to compensate for gaps after die wear, thus affecting service life.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: an automatic die-cutting mechanism, characterized in that it comprises: The guide rail base plate is fixedly connected to a lower die cutter, a vertically arranged upper die guide post, and a first linear guide rail and a second linear guide rail that are parallel to each other. A cutting mechanism, comprising: an upper die cutter, the upper die cutter being slidably fitted onto the upper die guide post through a through hole therein, and a linear guide rail connecting plate being horizontally spanned and fixedly connected to the top of the upper die cutter, the two ends of the linear guide rail connecting plate being slidably connected to the first linear guide rail and the second linear guide rail respectively. An upper die preload spring is sleeved on the outer periphery of the upper die guide post and located between the upper die cutter and the guide rail base plate. One end of the upper die preload spring abuts against the lower surface of the upper die cutter. The system includes a connecting mechanism and a transmission mechanism for driving the connecting mechanism, the connecting mechanism being connected to the upper die cutter to drive it to perform reciprocating linear motion.

[0008] Preferably, it also includes a spring preload screw, the spring preload screw being threaded through the upper die cutter, and the other end of the upper die preload spring abutting against the end of the spring preload screw.

[0009] Preferably, the connecting mechanism includes a first cam seat and a second cam seat connected by a drive shaft. The first cam seat and the second cam seat are rotatably supported on the guide rail base plate and are used to contact and push the upper die cutter during rotation.

[0010] Preferably, the connecting mechanism further includes a first bearing seat and a second bearing seat, the first bearing seat and the second bearing seat being fixed to the guide rail base plate, and the transmission shaft being rotatably connected to the first bearing seat and the second bearing seat via the first cam seat and the second cam seat.

[0011] Preferably, the transmission mechanism includes a constant torque motor, a motor bevel gear fixed on the output shaft of the constant torque motor, and a transmission bevel gear meshing with the motor bevel gear fixed on the transmission shaft.

[0012] Preferably, it also includes a die-cutting mold reset photoelectric sensor, which is configured such that its sensing optical path is triggered by the connecting mechanism when the connecting mechanism rotates to a preset reset position.

[0013] Preferably, it also includes a guiding mechanism, which is fixed to the guide rail base plate and located on one side of the lower die cutter. The guiding mechanism includes an upper feed guide plate and a lower feed guide plate, which are spaced apart to form a material channel.

[0014] Preferably, the cutting edge of the upper die cutter is a circular arc blade.

[0015] This utility model has the following beneficial effects: 1. This utility model solves the problem in the prior art where the upper die cutter is prone to shaking or wobbling during high-speed reciprocating motion, resulting in unstable cutting accuracy, by setting a composite guiding structure in which the upper die cutter guide post and double linear guide rail cooperate with each other. It significantly improves the accuracy and stability of the upper die cutter's motion trajectory, thereby ensuring high precision in industrial cutting and consistent product results.

[0016] 2. This utility model solves the problems in the prior art where the gap between the upper and lower dies affects the cutting tightness, and the dies cannot be automatically compensated for after wear, resulting in a shortened service life. By setting an adjustable upper die preload spring, it achieves the effect of eliminating cutting gaps in real time, ensuring cutting quality, and effectively compensating for tool wear, thereby significantly extending the service life of the die. Attached Figure Description

[0017] Figure 1 This is a perspective view of the automatic die-cutting mechanism proposed in this utility model; Figure 2 This is a schematic diagram of the guide mechanism of the automatic die-cutting mechanism proposed in this utility model; Figure 3 This is a schematic diagram of the cutting mechanism of the automatic die-cutting mechanism proposed in this utility model; Figure 4 This is a schematic diagram of the upper die cutter of the automatic die-cutting mechanism proposed in this utility model.

[0018] Legend: 1. Guide rail base plate; 2. Connecting mechanism; 201. First linear guide rail; 202. Second linear guide rail; 203. Linear guide rail connecting plate; 204. Second cam seat; 205. Second bearing seat; 206. First cam seat; 207. First bearing seat; 208. Die reset photoelectric sensor; 3. Cutting mechanism; 301. Upper die cutter; 302. Lower die cutter; 4. Transmission mechanism; 401. Motor bevel gear; 402. Transmission bevel gear; 403. Constant torque motor; 404. Transmission shaft; 5. Guiding mechanism; 501. Lower feed guide plate; 502. Upper feed guide plate; 6. Upper die guide post; 7. Spring preload screw; 8. Upper die preload spring. Detailed Implementation

[0019] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Reference Figures 1-3This utility model provides an embodiment of an automatic die-cutting mechanism, including a guide rail base plate 1, which serves as the mounting base for the entire device and supports all other components. A lower die cutter 302 is fixedly connected to the guide rail base plate 1. An upper die cutter 301, capable of reciprocating linear motion toward or away from the lower die cutter 302, is also provided above the guide rail base plate 1. The upper die cutter 301 is connected to a transmission mechanism 4 via a connecting mechanism 2, and the transmission mechanism 4 drives the connecting mechanism 2, thereby driving the upper die cutter 301 to complete the cutting and resetting actions. To ensure the high precision and stability of the upper die cutter 301 during high-speed reciprocating motion, an upper die guide post 6 is included, and a first linear guide rail 201, a second linear guide rail 202, and a linear guide rail connecting... The double-rail guide assembly, consisting of plates 203, has one end of the upper die guide post 6 vertically fixed to the guide rail base plate 1. The upper die cutter 301 has a through hole, and the upper die guide post 6 slides through the through hole, providing initial rigid support and guidance for the movement of the upper die cutter 301. The first linear guide rail 201 and the second linear guide rail 202 are parallel to each other and fixedly installed on the guide rail base plate 1. The linear guide rail connecting plate 203 spans across and is fixedly connected to the top of the upper die cutter 301. The two ends of the linear guide rail connecting plate 203 are slidably connected to the first linear guide rail 201 and the second linear guide rail 202, respectively, which greatly enhances the accuracy of the movement of the upper die cutter 301 and its anti-sway capability, providing structural guarantee for high-precision cutting. To compensate for the cutting gap and automatically reset the upper die, a pre-compression reset assembly consisting of an upper die pre-compression spring 8 and a spring pre-compression screw 7 is also provided in the mechanism. The upper die pre-compression spring 8 is sleeved on the outer periphery of the upper die guide post 6, and its whole body is located between the upper die cutter 301 and the guide rail base plate 1. One end of the spring abuts against the lower surface of the upper die cutter 301, and the spring pre-compression screw 7 is threaded through the upper die cutter 301. The other end of the upper die pre-compression spring 8 abuts against the end of the spring pre-compression screw 7. By turning the spring pre-compression screw 7, the preload of the upper die pre-compression spring 8 can be precisely adjusted, thereby ensuring that the upper die cutter 301 rebounds quickly when resetting and provides the necessary preload during cutting. The connecting mechanism 2 mainly includes a first cam seat 206, a second cam seat 204, a first bearing seat 207, and a second bearing seat 205. The first cam seat 206 and the second cam seat 204 are fixedly connected by a common drive shaft 404 to form an integrally rotating cam assembly. The cam assembly is rotatably supported on the guide rail base plate 1 and is used to contact and push the upper die cutter 301 downward during rotation. The first bearing seat 207 and the second bearing seat 205 are respectively fixed on the guide rail base plate 1. The two ends of the drive shaft 404 are rotatably connected to the first bearing seat 207 and the second bearing seat 205 via the first cam seat 206 and the second cam seat 204, respectively, to ensure the stability and coaxiality of the drive shaft 404 and the cam assembly it drives during high-speed rotation. Meanwhile, the transmission mechanism 4 is used to provide driving force for the connecting mechanism 2. The transmission mechanism 4 includes a constant torque motor 403. A motor bevel gear 401 is fixedly installed on the output shaft of the constant torque motor 403, and a transmission bevel gear 402 that meshes with the motor bevel gear 401 is fixedly installed on the transmission shaft 404. When working, the constant torque motor 403 starts, and the power is transmitted to the transmission shaft 404 through the meshing of the motor bevel gear 401 and the transmission bevel gear 402, thereby driving the first cam seat 206 and the second cam seat 204 to rotate synchronously. Then, through its cam profile, it pushes the upper die cutter 301 to complete the cutting action, realizing a 90-degree change in the power direction, which allows the motor to be laid out more flexibly. The entire drive and transmission chain structure is compact and has high transmission efficiency. The automatic die-cutting mechanism also includes a die-cutting reset photoelectric sensor 208. The die-cutting reset photoelectric sensor 208 is configured such that its sensing area faces the movement trajectory of the rotating component in the connecting mechanism 2. When the first cam seat 206 or the second cam seat 204 in the connecting mechanism 2 rotates to the preset reset position, the structure on it will enter the sensing area of ​​the die-cutting reset photoelectric sensor 208, thereby triggering its sensing optical path by the connecting mechanism 2. The die-cutting reset photoelectric sensor 208 then outputs an electrical signal to the controller of the constant torque motor 403, causing it to stop running, thereby accurately completing one work cycle and stopping at the initial position. To ensure that the material to be cut can be accurately conveyed between the upper and lower die cutters, the automatic die cutting mechanism also includes a guide mechanism 5. The guide mechanism 5 is fixed on the guide rail base plate 1 and located on one side of the lower die cutter 302. The guide mechanism 5 consists of an upper feed guide plate 502 and a lower feed guide plate 501. The upper feed guide plate 502 and the lower feed guide plate 501 are arranged parallel to each other vertically and spaced apart, forming a flat material channel between them. The material passes through this channel and can be stably and accurately guided to the die cutting station above the lower die cutter 302. In order to reduce cutting resistance during the cutting process and make the shearing process smoother and less strenuous, the cutting edge of the upper die cutter 301 is a circular arc blade. Compared with a straight blade, the circular arc blade can form a gradual shearing process when cutting into the material downwards, rather than an instantaneous full contact, thereby effectively reducing the instantaneous cutting force and improving the smoothness of the cutting action.

[0021] Working principle: First, the kraft paper, PE film or plastic materials to be cut are accurately conveyed to the upper surface of the lower die cutter 302 through the material channel formed by the upper feed guide plate 502 and the lower feed guide plate 501 in the guide mechanism 5. The constant torque motor 403 is started, and its output shaft drives the motor bevel gear 401 to rotate. The motor bevel gear 401 then meshes with and drives the transmission bevel gear 402, so that the transmission shaft 404 rotates synchronously. The transmission shaft 404 drives the first cam seat 206 and the second cam seat 204 fixedly connected at both ends to rotate synchronously. This rotation is stably supported by the first bearing seat 207 and the second bearing seat 205. During the rotation of the cam seat, the cam profile on its outer periphery begins to contact and push the upper die cutter 301, forcing it to overcome the elastic force of the upper die preload spring 8 and move vertically downward. During this downward movement, the trajectory of the upper die cutter 301 is precisely limited by a double structure. The upper die guide post 6 slides in its through hole, providing the main rigid support and limit. The linear guide rail connecting plate 203 fixed to the top of the upper die cutter 301 drives the sliders at both ends to slide precisely along the fixed first linear guide rail 201 and second linear guide rail 202. The composite guide structure ensures that the upper die cutter 301 will not deflect or shake during the downward pressing process. Finally, the upper die cutter 301 with arc blades cooperates with the lower die cutter 302 to complete the precise shearing of the material. At the same time, the compressed upper die preload spring 8 provides a constant preload, effectively eliminating the gap between the blades and compensating for wear. When the cam seat rotates past the lowest point, its cam profile no longer exerts a pushing force on the upper die cutter 301. At this time, the elastic potential energy stored in the compressed upper die preload spring 8 is quickly released, pushing the upper die cutter 301 to quickly reset upwards along the guide path of the upper die guide post 6 and the double linear guide rail. When the first cam seat 206 or the second cam seat 204 rotates to the preset initial position, the die reset photoelectric sensor 208 will be triggered. The die reset photoelectric sensor 208 sends a signal to stop the constant torque motor 403 from running. Thus, a complete automated cutting cycle ends.

Claims

1. An automatic die-cutting mechanism, characterized in that, include: The guide rail base plate (1) is fixedly connected to the lower die cutter (302), the vertically arranged upper die guide post (6), and the first linear guide rail (201) and the second linear guide rail (202) that are parallel to each other. The cutting mechanism (3) includes: an upper die cutter (301), which is slidably sleeved on the upper die guide post (6) through a through hole, and a linear guide rail connecting plate (203) is horizontally and fixedly connected to the top of the upper die cutter (301), and the two ends of the linear guide rail connecting plate (203) are slidably connected to the first linear guide rail (201) and the second linear guide rail (202) respectively. The upper die preload spring (8) is sleeved on the outer periphery of the upper die guide post (6) and located between the upper die cutter (301) and the guide rail base plate (1). One end of the upper die preload spring (8) abuts against the lower surface of the upper die cutter (301). The connection mechanism (2) and the transmission mechanism (4) that drives the connection mechanism (2) are connected to the upper die cutter (301) to drive it to perform reciprocating linear motion.

2. The automatic die-cutting mechanism according to claim 1, characterized in that: It also includes a spring preload screw (7), which is threaded through the upper die cutter (301), and the other end of the upper die preload spring (8) abuts against the end of the spring preload screw (7).

3. The automatic die-cutting mechanism according to claim 1, characterized in that: The connecting mechanism (2) includes a first cam seat (206) and a second cam seat (204) connected by a drive shaft (404). The first cam seat (206) and the second cam seat (204) are rotatably supported on the guide rail base plate (1) and are used to contact and push the upper die cutter (301) during rotation.

4. The automatic die-cutting mechanism according to claim 3, characterized in that: The connecting mechanism (2) further includes a first bearing seat (207) and a second bearing seat (205). The first bearing seat (207) and the second bearing seat (205) are fixed on the guide rail base plate (1). The transmission shaft (404) is rotatably connected to the first bearing seat (207) and the second bearing seat (205) via the first cam seat (206) and the second cam seat (204).

5. The automatic die-cutting mechanism according to claim 3, characterized in that: The transmission mechanism (4) includes a constant torque motor (403), a motor bevel gear (401) is fixed on the output shaft of the constant torque motor (403), and a transmission bevel gear (402) that meshes with the motor bevel gear (401) is fixed on the transmission shaft (404).

6. The automatic die-cutting mechanism according to claim 1, characterized in that: It also includes a die reset photoelectric sensor (208), which is configured such that when the connecting mechanism (2) rotates to a preset reset position, its sensing optical path is triggered by the connecting mechanism (2).

7. The automatic die-cutting mechanism according to claim 1, characterized in that: It also includes a guiding mechanism (5), which is fixed on the guide rail base plate (1) and located on one side of the lower die cutter (302). The guiding mechanism (5) includes an upper feed guide plate (502) and a lower feed guide plate (501), which are spaced apart to form a material channel.

8. The automatic die-cutting mechanism according to claim 1, characterized in that: The cutting edge of the upper die cutter (301) is a circular arc blade.

Images