Automobile sound insulation cotton cutting device
By using a punching method and automated feeding components, the problem of complex operation of existing sound insulation cotton cutting devices has been solved, enabling efficient cutting and automated production of irregularly shaped sound insulation cotton.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUIZHOU FANGZHIDA NEW MATERIALS CO LTD
- Filing Date
- 2026-03-30
- Publication Date
- 2026-06-05
AI Technical Summary
Existing automotive sound insulation cotton cutting devices are complex to operate, making it difficult to efficiently cut irregularly shaped sound insulation cotton, and have low production efficiency.
Using a punching method, combined with a clamping cylinder, a punching cylinder, and a material suction assembly, and driven by a servo motor, the feeding assembly achieves automated cutting and collection. It uses adjustable punching dies and punching blades to adapt to the cutting of various shapes of sound insulation cotton.
It achieves efficient cutting of irregularly shaped sound insulation cotton, with good production consistency, high degree of automation, reduced manual intervention, and suitability for mass production.
Smart Images
Figure CN122147680A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of automotive sound insulation cotton processing technology, specifically to an automotive sound insulation cotton cutting device. Background Technology
[0002] Sound insulation cotton has many applications in automobiles, such as in automotive air conditioning systems. It's applied to the outer wall of the air conditioning ducts to reduce noise from the ductwork. The cotton absorbs and blocks fan noise and airflow turbulence noise radiating outwards from the duct, reducing duct wall vibration and resonance, thus improving cabin comfort. Sound insulation cotton also provides thermal insulation, reducing the amount of cold air heated by external heat during air conditioning operation, improving cooling efficiency, reducing compressor load, and preventing condensation on the duct walls. During cooling, the outer wall of the air conditioning duct is cold and prone to condensation when exposed to humid air inside the car; the sound insulation cotton prevents moisture from contacting the cold duct wall, thus avoiding condensation. The sound insulation cotton used in air conditioning ducts is typically XPE / NBR closed-cell cotton or composite cotton, which is soft. Its shape usually matches the outer wall of the duct. However, due to the irregular shape of the air conditioning duct, traditional cutting methods, such as hand-held utility knives or scissors, are inefficient and inconsistent, often resulting in burrs on the finished product that affect overall quality.
[0003] Existing technologies include some automated cutting devices. For example, patent CN117445049B discloses a positioning and cutting device for processing automotive sound insulation pads, comprising a limiting structure, a moving component, a cutting structure, and a feeding structure. The moving component is fixedly mounted on the limiting structure, the cutting structure is fixedly mounted on the moving component, and the feeding structure is fixedly mounted on the limiting structure. Through the cooperation of the moving component and the cutting structure, different material blocks of different sizes can be cut according to requirements. However, this cutting device can only cut sound insulation cotton of specific shapes and specifications. It still relies on traditional manual methods to cut regular sound insulation cotton into shapes suitable for the outer wall of air conditioning ducts. It cannot efficiently process sound insulation cotton with irregular shapes.
[0004] Patent CN204869094U discloses a punching and cutting device for air conditioning sound insulation cotton. It uses a sliding seat to hold the sound insulation cotton, which is then pressed together by pressure blocks. The sliding seat slides on sliding rollers into the punching cavity, where it is punched by the punching blade of the punching die. After punching, the sliding seat exits, the cut material is removed, and waste falls into a waste suction hood for recycling. A magnetic connecting block and an electromagnetic fixing block fix the sliding seat in the punching cavity. The electromagnetic fixing block generates magnetism when energized; when punching is needed, its magnetism is opposite to that of the magnetic connecting block, thus connecting them. After punching, the electromagnetic fixing block changes its magnetism to match that of the magnetic connecting block, allowing the sliding seat to slide out safely, conveniently, and quickly. Furthermore, a feeding plate is provided to feed the cut pieces of sound insulation cotton, and a rotating column feeds uncut rolls of sound insulation cotton. Although the device can cut irregularly shaped sound insulation cotton by setting a punching die, the sliding seat frequently enters and exits the punching cavity, and the cut material needs to be manually removed after each punching. The process is complicated and the efficiency improvement is not obvious. Summary of the Invention
[0005] To address the shortcomings of existing technologies, the technical problem solved by this invention is to provide an automotive sound insulation cotton cutting device, thereby solving the problem of complex operation of existing sound insulation cotton punching devices.
[0006] To solve the above problems, the technical solution adopted by the present invention is: a cutting device for automotive sound insulation cotton, including a machine base, a cutting base provided on the machine base, the cutting base being mounted on the machine base by a support column, a pressing cylinder and a cutting cylinder being provided above the cutting base, a pressure sleeve being provided at the bottom of the pressing cylinder, a cutting die being provided at the lower end of the telescopic rod of the cutting cylinder, a cutting knife being provided at the bottom of the cutting die, the cutting knife being matched with the cutting base, the cutting cylinder being installed at the end of the telescopic rod of the pressing cylinder, a through hole being provided in the middle of the cutting base, and a suction assembly being provided below the cutting base for suctioning the cut sound insulation cotton product. The suction assembly includes a hood, a collection box, and a negative pressure fan. The hood is connected to the collection box, which is located below the hood. The negative pressure fan is installed on the side of the collection box. The assembly also includes a feeding assembly, which includes material rollers and guide rollers. There are two material rollers, which are rotatably installed at the feed end and the discharge end of the machine. There are two guide rollers, which are rotatably installed on both sides of the punching base. The top of the guide rollers is tangent to the extension line of the upper surface of the punching base. The material roller at the feed end of the machine is used to install the sound insulation cotton roll, and the material roller at the discharge end of the machine is used to roll up the remaining sound insulation cotton after cutting. The two material rollers are driven by a servo motor and rotate simultaneously.
[0007] Furthermore, there are four clamping cylinders, and a bracket is provided above the machine to install the clamping cylinders. The ends of the telescopic rods of the four clamping cylinders are connected to a mounting plate. The punching cylinder is installed in the middle of the mounting plate. The four clamping cylinders extend and retract simultaneously to control the lifting and lowering of the mounting plate, thereby driving the lifting and lowering of the punching cylinder. The pressure sleeve consists of two pressure plates arranged symmetrically on the left and right sides. They are installed around the lower end of the mounting plate by screws. The two pressure plates form a ring to press the sound insulation cotton to be cut. The inner space of the pressure sleeve is larger than the punching die.
[0008] Furthermore, the hood is a square tube, with the upper end face of the hood abutting against the lower end face of the punching base. A mesh plate is provided at the connection between the negative pressure fan and the collection box, and through-beam infrared sensors are provided on both sides inside the collection box.
[0009] Furthermore, the blanking cutter is a ring-shaped cutter, and the shape of the blanking cutter is customized according to the required sound insulation cotton shape. The blanking cutter is mounted on the blanking die by screws.
[0010] Furthermore, the through hole of the blanking base is the same shape as the blanking blade, and the area of the through hole is smaller than the area enclosed by the blade of the blanking blade.
[0011] Furthermore, the punching base is mounted on the upper end of the support column by screws.
[0012] Compared to existing technologies, the advantages of this solution are: 1. Cutting is carried out by punching. The corresponding punching base and punching knife can be customized according to various shapes and sizes of sound insulation cotton. This device can cut sound insulation cotton with irregular shapes and produce sound insulation cotton with good consistency. 2. By setting material rollers at the inlet and outlet of the machine for feeding and collecting residual material, and setting a suction component at the bottom of the punching base to automatically collect the cut sound insulation cotton, the feeding, cutting and collection processes can be completed automatically without manual intervention, resulting in high production efficiency and suitability for mass production of sound insulation cotton. 3. The punching cylinder is installed at the telescopic end of the clamping cylinder, which facilitates the sequence of clamping before cutting while saving cylinder stroke and effectively improving cutting efficiency. Attached Figure Description
[0013] Figure 1 This is an overall schematic diagram of the present invention; Figure 2 This is a front view schematic diagram of the present invention; Figure 3 This is a schematic diagram of the punching base of the present invention; Figure 4 This is a schematic diagram of the compression sleeve and punching die of the present invention; Figure 5 This is a schematic diagram of the feeding assembly of the present invention; In the diagram: 1. Machine base; 2. Blanking base; 3. Support column; 4. Clamping cylinder; 5. Blanking cylinder; 6. Pressing sleeve; 7. Blanking die; 8. Blanking knife; 9. Mounting plate; 10. Air cover; 11. Collection box; 12. Negative pressure fan; 13. Material roller; 14. Guide roller; 15. Servo motor; 16. Sound insulation cotton roll; 201. Through hole. Detailed Implementation
[0014] 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.
[0015] Implementation, for example, attached Figures 1 to 5The following describes a car sound insulation cotton cutting device: A machine base 1 is provided with a punching base 2 on the machine base 1. The punching base 2 is mounted on the machine base 1 via a support column 3. A pressing cylinder 4 and a punching cylinder 5 are located above the punching base 2. A pressure sleeve 6 is provided at the bottom of the pressing cylinder 4 for pressing the sound insulation cotton. A punching die 7 is provided at the lower end of the telescopic rod of the punching cylinder 5, and a punching knife 8 is provided at the bottom of the punching die 7 for cutting the sound insulation cotton. The punching knife 8 is matched with the punching base 2. The punching cylinders 5 are installed at the ends of the telescopic rods of the pressing cylinders 4. There are four pressing cylinders 4. A bracket is provided above the machine base 1 to mount the pressing cylinders 4. The ends of the telescopic rods of the four pressing cylinders 4 are connected to a mounting plate 9. The punching cylinders 5 are installed in the middle of the mounting plate 9. The simultaneous extension and retraction of the four pressing cylinders 4 controls the lifting and lowering of the mounting plate 9, thereby driving the lifting and lowering of the punching cylinders 5. The pressure sleeve 6 consists of two symmetrically arranged pressure plates, which are installed around the lower end of the mounting plate 9 by screws, forming a ring. The pressure sleeve 6 is larger than the cutting die 7. The cutting base 2 has a through hole 201 in the middle. The cutting base 2 is installed on the upper end of the support column 3 by screws, which makes it easy to replace the cutting base 2 with different sizes of through holes 201. It is suitable for cutting various specifications of sound insulation cotton. The cutting base 2 is provided with a suction component below it to suck up the cut sound insulation cotton. The suction component includes a fan hood 10, a collection box 11 and a negative pressure fan 12. The fan hood 10 and the collection box 11 are connected. The collection box 11 is connected and located below the hood 10. The negative pressure fan 12 is installed on the side of the collection box 11. The hood 10 is a square tube. The upper end face of the hood 10 abuts against the lower end face of the punching base 2. A mesh plate is provided at the connection between the negative pressure fan 12 and the collection box 11 to prevent the sound insulation cotton from being sucked into the negative pressure fan 12. There are through-beam infrared sensors on both sides inside the collection box 11. When the sound insulation cotton blocks the beam of light emitted by the sensor, the negative pressure fan 12 is controlled to cut off the power and stop rotating.The cutting blade 8 is a ring-shaped blade, and its shape is customized according to the required shape of the sound insulation cotton. The cutting blade 8 is mounted on the cutting die 7 with screws, facilitating the replacement of cutting blades of different shapes. The through hole 201 of the cutting base 2 has the same shape as the cutting blade 8, and the area of the through hole 201 is smaller than the area enclosed by the cutting edge of the cutting blade 8, effectively ensuring that the cutting blade 8 contacts the cutting base 2 to achieve cutting. Specifically, the edge of the through hole 201 is 5-10mm away from the cutting edge of the cutting blade 8, so that the distance between the edge of the cut sound insulation cotton and the edge of the through hole 201 is small, ensuring that the sound insulation cotton can pass smoothly. The through hole 201 of the punching base 2 enters the air hood 10 and also includes a feeding assembly. The feeding assembly includes material rollers 13 and guide rollers 14. There are two material rollers 13, which are rotatably mounted at the infeed end and the discharge end of the machine base 1. There are two guide rollers 14, which are rotatably mounted on both sides of the punching base 2. The top of the guide rollers 14 is tangent to the extension line of the upper surface of the punching base 2. The material rollers 13 at the infeed end of the machine base 1 are used to install the sound insulation cotton roll 16, and the material rollers 13 at the discharge end of the machine base 1 are used to wind up the remaining sound insulation cotton after cutting. The two material rollers 13 are driven by a servo motor 15 and rotate simultaneously.
[0016] The specific implementation process is as follows: The sound insulation cotton roll 16 is installed on the feed roller 13 at the feed end of the machine base 1. A section of sound insulation cotton is pulled out of the roll, passes through the guide roller 14 and the upper end of the punching base 2, and the end is wound around the feed roller 13 at the discharge end of the machine base 1. Since the punching base 2 is equipped with guide rollers 14 at both ends, the sound insulation cotton can be laid flat on the upper surface of the punching base 2. The starting device is activated, and the pressing cylinder 4 works to drive the pressing sleeve 6 to move down and press the sound insulation cotton around the punching base 2. The punching cylinder 5 works to drive the punching die 7 to move down, and the punching knife 8 at the bottom of the punching die 7 cuts the sound insulation cotton. After cutting, the punching die 7 rises, and the pressing cylinder 4 continues to press. The negative pressure fan 12 starts to reduce the air pressure in the air hood 10 and the collection box 11. Since the sound insulation cotton is soft and the punching base 2 is provided with a through hole 201 for the sound insulation cotton to pass through, the cut sound insulation cotton will be sucked into the air hood 10 and then into the collection box 11 under the pressure difference. The collection box 11 is equipped with The box has a door for easy access to remove the sound insulation cotton. After the through-beam infrared sensor inside the collection box 11 detects the sound insulation cotton, the negative pressure fan 12 stops rotating. After the negative pressure fan 12 stops rotating, the pressing cylinder 4 works to drive the pressure sleeve 6 to rise to the initial position. The servo motor 15 works to drive the feeding component to rotate, pulling the material roll a certain distance so that the position to be cut enters the punching base 2. Then the servo motor 15 stops rotating. The pressing, punching, collection, pressing and releasing and feeding steps are repeated. It can process irregularly shaped sound insulation cotton in batches. The whole process does not require much manual intervention. Manual operation is only required when changing the material roll. The production efficiency is high and the sound insulation cotton has good consistency. The action control of the cylinder, the rotation control of the servo motor and the rotation control of the negative pressure fan can be achieved by control technology with common knowledge. The cylinder can also be replaced by a hydraulic cylinder or an electric telescopic rod to achieve the same action. It will not be elaborated here.
[0017] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A cutting device for automotive sound insulation cotton, comprising a machine base, a punching base mounted on the machine base via a support column, a clamping cylinder and a punching cylinder mounted above the punching base, a pressure sleeve at the bottom of the clamping cylinder, a punching die at the lower end of the telescopic rod of the punching cylinder, a punching knife at the bottom of the punching die, the punching knife being matched with the punching base, characterized in that: The punching cylinder is installed at the end of the telescopic rod of the clamping cylinder. The punching base has a through hole in the middle. A suction assembly is provided below the punching base to suck up the cut sound insulation cotton finished product. The suction assembly includes a hood, a collection box and a negative pressure fan. The hood is connected to the collection box, which is located below the hood. The negative pressure fan is installed on the side of the collection box. It also includes a feeding assembly, which includes a material roller and a guide roller. There are two material rollers and they are rotatably installed at the feed end and the discharge end of the machine. There are two guide rollers and they are rotatably installed on both sides of the punching base. The top of the guide roller is tangent to the extension line of the upper surface of the punching base. The material roller at the feed end of the machine is used to install the sound insulation cotton roll, and the material roller at the discharge end of the machine is used to roll up the leftover sound insulation cotton after cutting. The two material rollers are driven by a servo motor and rotate simultaneously.
2. The automotive sound insulation cotton cutting device according to claim 1, characterized in that: There are four clamping cylinders. The clamping cylinders are mounted on a bracket above the machine. The ends of the telescopic rods of the four clamping cylinders are connected to a mounting plate. The punching cylinder is installed in the middle of the mounting plate. The four clamping cylinders extend and retract simultaneously to control the lifting and lowering of the mounting plate, which in turn drives the punching cylinder to lift and lower. The pressure sleeve consists of two pressure plates arranged symmetrically on the left and right sides. They are installed around the lower end of the mounting plate with screws. The two pressure plates form a ring to press the sound insulation cotton to be cut. The inner space of the pressure sleeve is larger than the punching die.
3. The automotive sound insulation cotton cutting device according to claim 1, characterized in that: The hood is a square tube, with the upper end face of the hood abutting against the lower end face of the punching base. A mesh plate is provided at the connection between the negative pressure fan and the collection box, and through-beam infrared sensors are provided on both sides inside the collection box.
4. The automotive sound insulation cotton cutting device according to claim 1, characterized in that: The blanking cutter is a ring-shaped cutter, and its shape is customized according to the required sound insulation cotton shape. The blanking cutter is mounted on the blanking die by screws.
5. The automotive sound insulation cotton cutting device according to claim 1, characterized in that: The through hole of the blanking base is the same shape as the blanking knife, and the area of the through hole is smaller than the area enclosed by the blade of the blanking knife.
6. The automotive sound insulation cotton cutting device according to claim 1, characterized in that: The punching base is mounted on the upper end of the support column by screws.