Compact ultrathin pneumatic scissors

Abstract

The utility model discloses a pair of compact ultrathin pneumatic scissors. The pair of compact ultrathin pneumatic scissors comprises a cylinder body, a piston and a tool bit, one end of the cylinder body is provided with an air channel in the axis direction, the air channel is fixedly connected with an air pipe connector in a sealed mode, the cylinder body is provided with a through groove in the width direction to form a piston cavity, the air channel is communicated with the piston cavity, the two pistons are symmetrically distributed in the piston cavity in the axis direction of the cylinder body, and one end of each piston abuts against one end face of the piston cavity. The other end of the piston abuts against the other end face of the piston cavity, the piston is connected with the cylinder body in a sealed mode, the piston is in a kidney shape, the protruding position of the piston faces outwards, a supporting part is arranged on the inner side of the protruding position of the piston, and the supporting part and the piston are integrally formed. The compact ultrathin pneumatic scissors solve the technical problems that in the technical field of mold plastic product shearing, due to the fact that traditional pneumatic scissors are large in size, movement interference is prone to being generated between the traditional pneumatic scissors and other parts, stability is poor, and the failure rate is high.

Description

Technical Field

[0001] This utility model relates to the field of mold plastic product cutting technology, specifically to a compact ultra-thin pneumatic scissors. Background Technology

[0002] In the production of modern plastic products and precision castings, the separation of molded products from sprues is a crucial post-processing step. Pneumatic shears, as efficient sprue cutting devices, are widely used in this process due to their advantages of being powered by compressed air and providing stable shearing force. To address the issue of automated sprue cutting of plastic products in small molding machines with very limited internal space, pneumatic shears are still used.

[0003] However, most existing displacement pneumatic shears, square pneumatic shears, round pneumatic shears, and manual pneumatic shears on the market are large in size and bulky in structure, making them difficult to fit into the internal space layout of small molding machines. In the production process of small molding machines, when the take-out machine clamps the molded product from the mold onto the conveyor belt, the size limitations of traditional pneumatic shears prevent them from being installed on the take-out machine's fixture. This necessitates the need for separate workstations for product and sprue cutting operations, increasing the equipment's footprint and the complexity of the production process. Furthermore, the non-integrated shearing method also extends the product transport path, affecting production efficiency and increasing production costs. In addition, the heavy structure of traditional pneumatic shears, when installed in the limited space of a small molding machine, is prone to interference with other components, resulting in poor equipment stability and a high failure rate, making it difficult to meet the compact and efficient production requirements of small molding machines. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a compact, ultra-thin pneumatic scissors to solve the technical problems of traditional pneumatic scissors in the field of mold plastic product cutting technology, which are prone to motion interference with other components due to their large size, poor stability, and high failure rate.

[0005] To achieve the above technical objectives, the present invention provides a compact, ultra-thin pneumatic scissors, comprising:

[0006] The cylinder comprises a cylinder body, a piston, and a cutting head; one end of the cylinder body has an air passage along its axial direction; the air passage is sealed and fixedly connected to an air pipe connector; the cylinder body has a through groove along its width direction to form a piston cavity; the air passage communicates with the piston cavity; two pistons are symmetrically distributed and housed within the piston cavity along the axial direction of the cylinder body; one end of each piston abuts against one end face of the piston cavity; the other end of each piston abuts against the other end face of the piston cavity; the piston is sealed to the cylinder body; the piston is waist-shaped; the protrusion of the piston faces outward; a support portion is provided on the inner side of the protrusion of the piston; the support portion is integrally formed with the piston.

[0007] Compared with the prior art, the beneficial effects of this utility model include:

[0008] 1. The compact ultra-thin pneumatic scissors provided by this utility model have a compact and ultra-thin cylinder design, which greatly reduces the space occupied by the product and solves the technical problems of traditional pneumatic scissors in the field of mold plastic product cutting technology, which are prone to motion interference with other components due to their large size, poor stability and high failure rate.

[0009] 2. The compact ultra-thin pneumatic scissors provided by this utility model can be clamped by a φ8 connecting block or quickly connected through two threaded holes in the cylinder. The installation method is diversified, which simplifies the connection of the pneumatic scissors on the clamp plate and makes operation convenient. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the three-dimensional structure of the compact ultra-thin pneumatic scissors provided by this utility model;

[0011] Figure 2 This is a cross-sectional view of the compact, ultra-thin pneumatic scissors provided by this utility model;

[0012] Figure 3 This is a schematic diagram of the working structure of the compact ultra-thin pneumatic scissors provided by this utility model;

[0013] Figure 4 This is a schematic diagram of the compact ultra-thin pneumatic scissors provided by this utility model when not in operation;

[0014] Figure 5 This is a schematic diagram of the compact ultra-thin pneumatic scissors and profile installation structure provided by this utility model;

[0015] Figure 6 This is a schematic diagram of the compact, ultra-thin pneumatic scissors and steel pipe installation structure provided by this utility model. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 This embodiment provides a compact, ultra-thin pneumatic scissors, including: a cylinder 1, a piston 2, and a cutter head 3.

[0020] Furthermore, one end of the cylinder body 1 is provided with an air passage 1a along the axial direction, and the air passage 1a is sealed and fixedly connected to an air pipe connector 4. The cylinder body 1 is provided with a through groove along the width direction to form a piston chamber 1b. The air passage 1a is connected to the piston chamber 1b. The two pistons 2 are symmetrically distributed along the axial direction of the cylinder body 1 and built into the piston chamber 1b.

[0021] Furthermore, one end of the piston 2 abuts against one end face of the piston cavity 1b, and the other end of the piston 2 abuts against the other end face of the piston cavity 1b, and the piston 2 is sealed to the cylinder body 1.

[0022] Furthermore, the piston 2 is waist-shaped, with the protrusion of the piston 2 facing outward. A support portion 2a is provided on the inner side of the protrusion of the piston 2. The support portion 2a is integrally formed with the piston 2. The support portion 2a is used to strengthen the support strength of the piston 2 to prevent deformation of the piston 2.

[0023] Furthermore, the cylinder body 1 is made of aluminum alloy, and the piston 2 is made of hard resin.

[0024] Furthermore, in this embodiment, the cylinder body 1 is made of an ultra-thin 9mm thickness, which not only ensures the strength of the cylinder body 1, but also reduces the volume of the product itself, making it suitable for installation in the limited space of a small molding machine.

[0025] Furthermore, the cylinder body 1 has a mounting hole 1c along the thickness direction at one end near the air passage 1a. When the pneumatic shears are connected to the profile 5, the cylinder body 1 is bolted to the adapter plate 6 through the mounting hole 1c, and the adapter plate 6 is bolted to the profile 5.

[0026] Furthermore, the other end of the cylinder body 1 is provided with a shaft pin hole 1d along the thickness direction, and the two cutter heads 3 are arranged symmetrically about the cylinder body 1. The cutter heads 3 are hinged to the cylinder body 1 by inserting a connecting pin through the shaft pin hole 1d.

[0027] Furthermore, the end of the cutter head 3 near the air passage 1a abuts against the protrusion of the piston 2. When the air passage 1a is supplied with air, the protrusion of the piston 2 moves to both sides, causing the end of the cutter head 3 near the air passage 1a to move to both sides. When the two cutter heads 3 rotate relative to the cylinder 1, the tips of the two cutter heads 3 cross and contact, thus cutting off the water inlet.

[0028] Furthermore, a limiting groove 3a is formed on the inner side of the cutter head 3, and an elastic element 7 is provided in the limiting groove 3a. One end of the elastic element 7 is placed in the limiting groove 3a of one cutter head 3, and the other end of the elastic element 7 is placed in the limiting groove 3a of another cutter head 3.

[0029] Furthermore, in this embodiment, the elastic element 7 serves a reset function. When the pneumatic scissors are not in operation, the compression of the elastic element 7 is relatively small; when the pneumatic scissors are performing cutting operations, the compression of the elastic element 7 is relatively large. After the cutting operation is completed, the gas in the piston 2 decreases, and at the same time, the compression of the elastic element 7 gradually decreases, and the position of the blade 3 gradually resets.

[0030] Furthermore, the elastic element 7 is selected as a spring. The advantages of using a spring as a reset element in this embodiment are as follows: 1. Simple and compact structure: The spring has a relatively simple structure and small size, allowing for convenient installation and arrangement within the limited space of the pneumatic scissors. The compact structural design helps reduce the overall size and weight of the pneumatic scissors, improving their portability and operational flexibility; 2. Low cost: Springs are common mechanical parts with mature manufacturing processes and relatively low cost. Compared to some complex reset mechanisms or high-performance reset elements, using a spring as a reset element can effectively reduce production costs and improve the product's market competitiveness while ensuring the performance of the pneumatic scissors; 3. Reliable reset force: Springs can provide stable and predictable reset force. By selecting appropriate spring materials, specifications, and structures, the spring force can be precisely controlled to meet the reset requirements of the pneumatic scissors under different working conditions, ensuring accurate and reliable scissor operation.

[0031] Furthermore, when the pneumatic shears are connected to the steel pipe 8, the connecting block 9 is clamped and fixed to one end of the cylinder 1, and the connecting block 9 is bolted and fixed to the steel pipe 8.

[0032] Furthermore, the connecting block 9 is selected as φ8, and is used to clamp the cylinder 1 and the steel pipe 8.

[0033] Furthermore, the pneumatic scissors provided by this utility model have multiple installation methods, and can be fixedly connected to the profile 8 or the steel pipe 8.

[0034] Working Principle: The compact ultra-thin pneumatic scissors provided by this utility model include a cylinder body 1, a piston 2, and a cutter head 3. One end of the cylinder body 1 has an air passage 1a along its axial direction, and an air pipe connector 4 is sealed and fixedly connected to the air passage 1a. The cylinder body 1 has a through groove along its width direction to form a piston cavity 1b, and the air passage 1a communicates with the piston cavity 1b. Two pistons 2 are symmetrically distributed and housed within the piston cavity 1b along the axial direction of the cylinder body 1. One end of each piston 2 abuts against one end face of the piston cavity 1b, and the other end of each piston 2 abuts against the other end face of the piston cavity 1b. The pistons 2 are sealed to the cylinder body 1. The piston 2 is waist-shaped, with its protrusion facing outwards. A support portion 2a is provided inside the protrusion of the piston 2, and the support portion 2a is integrally formed with the piston 2.

[0035] Specifically, when no gas is introduced into the air passage 1a, that is, when the pneumatic scissors are not working, the piston 2 is in an unexpanded state. At this time, the compression of the elastic element 7 is small, and the two blades 3 of the pneumatic scissors are in an unfolded state.

[0036] When gas is introduced into the air passage 1a, the gas volume inside the piston 2 gradually increases, and the gas pressure gradually increases. The protrusion of the piston 2 moves to both sides, causing the cutter head 3 to move to both sides near the end of the air passage 1a. When the two cutter heads 3 rotate relative to the cylinder 1, the tips of the two cutter heads 3 cross and contact, thus cutting off the sprue. After the cutting operation is completed, the gas volume inside the piston 2 decreases, and at the same time, the compression of the elastic element 7 gradually decreases, the position of the cutter head 3 gradually returns to its original position, and the sprue cutting is completed.

[0037] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A compact, ultra-thin pneumatic scissors, characterized in that, include: The cylinder comprises a cylinder body, a piston, and a cutting head; one end of the cylinder body has an air passage along its axial direction; the air passage is sealed and fixedly connected to an air pipe connector; the cylinder body has a through groove along its width direction to form a piston cavity; the air passage communicates with the piston cavity; two pistons are symmetrically distributed and housed within the piston cavity along the axial direction of the cylinder body; one end of each piston abuts against one end face of the piston cavity; the other end of each piston abuts against the other end face of the piston cavity; the piston is sealed to the cylinder body; the piston is waist-shaped; the protrusion of the piston faces outward; a support portion is provided on the inner side of the protrusion of the piston; the support portion is integrally formed with the piston.

2. The compact, ultra-thin pneumatic scissors of claim 1, wherein, The cylinder body is made of aluminum alloy; the piston is made of hard resin.

3. The compact, ultra-thin air-pneumatic scissors according to claim 2, characterized in that The cylinder body has a mounting hole along its thickness at one end near the air passage; a shaft pin hole is formed at the other end of the cylinder body along its thickness; the two cutting heads are arranged symmetrically about the cylinder body's axis; the cutting heads are hinged to the cylinder body by inserting a connecting pin through the shaft pin hole.

4. The compact, ultra-thin air-pneumatic scissors of claim 3, wherein, The end of the cutter head near the air passage abuts against the protrusion of the piston; when an air source is introduced into the air passage, the protrusion of the piston moves to both sides, causing the end of the cutter head near the air passage to move to both sides.

5. The compact, ultra-thin air knife of claim 4, wherein, A limiting groove is formed on the inner side of the cutter head; an elastic element is provided in the limiting groove; one end of the elastic element is placed in the limiting groove of one cutter head; the other end of the elastic element is placed in the limiting groove of another cutter head.

6. The compact, ultra-thin air knife of claim 5, wherein, It also includes an adapter plate and a connecting block; when the pneumatic shears are connected to the profile, the cylinder body is bolted to the adapter plate through the mounting hole, and the adapter plate is bolted to the profile; when the pneumatic shears are connected to the steel pipe, the connecting block is clamped and fixed to one end of the cylinder body, and the connecting block is bolted to the steel pipe.

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