Polytetrafluoroethylene composition mixing device
By designing a mixing device for polytetrafluoroethylene (PTFE) compositions, and combining a fabric seam with a mixer, the problem of long mixing time for PTFE piston rings was solved, achieving uniform mixing of auxiliary materials and improving production efficiency and product quality.
Patent Information
- Application Number
- CN202423309581.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-31
AI Technical Summary
During the mixing process of polytetrafluoroethylene piston rings, the large proportion of polytetrafluoroethylene and the small proportion of auxiliary materials result in a long mixing time, which affects production efficiency and increases the defect rate.
A mixing device for polytetrafluoroethylene (PTFE) compositions was designed, which combines a fabric slit and a mixer. The auxiliary materials are slowly and evenly added into the mixing tank through a small hopper and a fabric block, and the mixing is achieved by using a rotary motor to drive the tank lid and a stirring motor, ensuring that the auxiliary materials are mixed evenly.
This improved the mixing efficiency of the polytetrafluoroethylene composition, ensuring product quality stability and production efficiency.
Smart Images
Figure CN223864053U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mixing technology, specifically relating to a mixing device for polytetrafluoroethylene compositions. Background Technology
[0002] Polytetrafluoroethylene (PTFE), commonly known as the "King of Plastics," is a high-molecular polymer synthesized from tetrafluoroethylene monomers. It is white, waxy, translucent, and exhibits excellent heat and cold resistance, allowing for long-term use at temperatures ranging from -180°C to 260°C. This material is resistant to acids, alkalis, and various organic solvents, and is virtually insoluble in all solvents. PTFE also possesses high-temperature resistance and an extremely low coefficient of friction, making it suitable for lubrication and as an ideal coating for easily cleaning the inner lining of water pipes. PTFE piston rings are ring-shaped and widely used in equipment such as compressors, utilizing the material's wear resistance and excellent sealing properties. The production process of PTFE piston rings generally includes batching, mixing, compaction, firing, and cutting. During the batching and mixing process, ordinary agitators are used. However, it has been found that because PTFE is the main ingredient and constitutes a large proportion of the batch, while some auxiliary materials are present in smaller quantities, the mixing process takes a long time to achieve uniform mixing, affecting production efficiency and leading to an increase in defective PTFE piston rings. Utility Model Content
[0003] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a mixing device for polytetrafluoroethylene composition, including a mixing tank, a stirrer installed inside the mixing tank, a tank cover on the mixing tank, a feeding port on the tank cover, a movable cover on the feeding port, a cloth feeding port on the tank cover, the cloth feeding port is elongated, one end of the cloth feeding port is close to the edge of the tank cover, and the other end points to the middle of the tank cover, a small hopper is installed on the tank cover, the lower end of the small hopper is connected to a cloth feeding block, the cloth feeding block has a cloth feeding cavity inside, the lower end of the cloth feeding block has a cloth feeding slit communicating with the cloth feeding cavity, the lower end of the cloth feeding block extends into the mixing tank from the cloth feeding port, the stirrer includes a stirring shaft, the lower end of the stirring shaft is located inside the mixing tank and connected to several stirring blades, the middle of the tank cover has a central hole for the stirring shaft to move through, the upper end of the stirring shaft passes through the central hole and is connected to a stirring motor, the stirring motor is mounted on a bracket, the mixing tank is mounted on the bracket, the tank cover is rotatably placed on the mixing tank, and the tank cover is driven by a rotary motor. The rotary motor drives the lid to rotate via gears.
[0004] As a preferred embodiment of the above technical solution, the small hopper is mounted on the bucket lid by a fixing frame. The fixing frame includes several support columns, and springs are sleeved on the support columns, with the springs fixedly connected to the bucket lid.
[0005] As a preferred embodiment of the above technical solution, the support is provided with a plastic baffle, the lower end of which is lower than the upper end of the small hopper.
[0006] As a preferred embodiment of the above technical solution, a drive gear is fixedly connected to the output shaft of the rotary motor, and a ring gear is fixedly connected to the circumferential surface of the bucket lid, with the drive gear and the ring gear meshing.
[0007] As a preferred embodiment of the above technical solution, the rotary motor is fixed on the bracket.
[0008] The beneficial effects of this invention are: the mixing device for the polytetrafluoroethylene composition of this invention facilitates the uniform mixing of various small amounts of additives during the production of polytetrafluoroethylene rings, improves the mixing efficiency of the polytetrafluoroethylene composition, and ensures the stable product quality of polytetrafluoroethylene rings. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0010] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0011] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0012] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0013] like Figure 1As shown, the mixing device for polytetrafluoroethylene (PTFE) composition includes a mixing tank 1, a stirrer installed inside the mixing tank 1, a tank lid 2 on the mixing tank 1, a feeding port 3 on the tank lid 2, a movable cover 4 covering the feeding port 3, and a cloth feeding port 5 on the tank lid 2. The cloth feeding port 5 is elongated, with one end near the edge of the tank lid 2 and the other end pointing towards the middle of the tank lid 2. A small hopper 6 is installed on the tank lid 2, and the lower end of the small hopper 6 is connected to a cloth block 7. The cloth block 7 has a cloth feeding cavity 8 inside, and the lower end of the cloth block 7 has a cloth feeding seam 9 communicating with the cloth feeding cavity 8. The lower end of the cloth block 7 extends into the mixing tank 1 from the cloth feeding port 5. The main material of PTFE is added into the mixing tank 1 through the feeding port 3. The auxiliary materials to be added are placed into the small hopper 6. During the continuous stirring process of the stirrer inside the mixing tank 1, the auxiliary materials are slowly and evenly added into the mixing tank 1 through the cloth feeding seam 9 and thoroughly and evenly mixed with the main material. The agitator includes a stirring shaft 10, the lower end of which is located inside the mixing tank 1 and connected to several stirring blades 11. A central hole 12 is provided in the middle of the tank cover 2 for the stirring shaft 10 to pass through. The upper end of the stirring shaft 10 passes through the central hole 12 and is connected to a stirring motor 13. The stirring motor 13 is mounted on a bracket 14, and the mixing tank 1 is mounted on the bracket 14. The rotating tank cover 2 covers the mixing tank 1 and is driven by a rotary motor 15. A drive gear 30 is fixedly connected to the output shaft of the rotary motor 15, and a ring gear 31 is fixedly connected to the circumferential surface of the tank cover 2. The drive gear 30 and the ring gear 31 mesh. The rotary motor 15 is fixed to the bracket 1. The rotation of the tank cover 2 causes the fabric seam 9 to rotate around the stirring shaft 10, allowing the material falling through the fabric seam 9 to be evenly distributed into the mixing tank 1. The small hopper 6 is mounted on the lid 2 via a fixing frame 16. The fixing frame 16 includes several support columns 17, each with a spring 18, which is fixedly connected to the lid 2. The small hopper 6 can be shaken, allowing the material in it to enter the cloth chamber 8 and then be evenly and slowly sprinkled into the mixing tank 1 through the cloth seam 9. A plastic baffle 19 is provided on the support 14, with its lower end lower than the upper end of the small hopper 6. During the rotation of the lid 2, the plastic baffle 19 acts as a slapping force on the small hopper 6, shaking the material into the cloth chamber 8 and then evenly discharging it into the mixing tank 1. The plastic baffle 19 is elastic and will bend and deform upon contact with the small hopper 6 without affecting the rotation of the lid 2.
[0014] It is worth mentioning that the technical features of the stirring motor 13 and the rotary motor 15 involved in this utility model patent application should be regarded as prior art. The specific structure, working principle and possible control method and spatial arrangement of these technical features can be adopted by conventional choices in the field, and should not be regarded as the utility model point of this utility model patent. This utility model patent will not be further elaborated in detail.
[0015] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experimentation on the basis of the prior art should be within the scope of protection defined by the claims.
Claims
1. A mixing device for a polytetrafluoroethylene composition, comprising a mixing tank, wherein a stirrer is installed inside the mixing tank, characterized in that, The mixing tank is equipped with a lid, which has a feeding port covered by a movable cover. The lid also has a long, narrow feeding port, one end of which is near the edge of the lid, and the other end pointing towards the center. A small hopper is mounted on the lid, and its lower end is connected to a feeding block with a feeding cavity inside. A feeding slit is located at the lower end of the feeding block, connecting to the feeding cavity. The lower end of the feeding block extends into the mixing tank through the feeding port. The agitator includes a stirring shaft, the lower end of which is located inside the mixing tank and connected to several stirring blades. The lid has a central hole in the center for the stirring shaft to pass through. The upper end of the stirring shaft passes through the central hole and is connected to a stirring motor, which is mounted on a bracket. The mixing tank is also mounted on the bracket. The lid rotates and covers the mixing tank, driven by a rotary motor.
2. The mixing apparatus for the polytetrafluoroethylene composition as described in claim 1, characterized in that, The small hopper is mounted on the bucket lid by a fixing frame, which includes several support columns. Springs are fitted on the support columns, and the springs are fixedly connected to the bucket lid.
3. The mixing apparatus for the polytetrafluoroethylene composition as described in claim 2, characterized in that, The support is equipped with a plastic baffle, the lower end of which is lower than the upper end of the small hopper.
4. The mixing apparatus for the polytetrafluoroethylene composition as described in claim 1, characterized in that, A drive gear is fixedly connected to the output shaft of the rotary motor, and a ring gear is fixedly connected to the circumferential surface of the bucket lid. The drive gear and the ring gear mesh.
5. The mixing apparatus for the polytetrafluoroethylene composition as described in claim 4, characterized in that, The rotary motor is fixed on the bracket.