Device for preventing rubber from sticking to the outlet and outlet chute of a rubber device extruder

Abstract

This utility model relates to the technical field of anti-adhesion devices for rubber, specifically a device for preventing adhesive buildup at the outlet of a rubber extruder and in the outlet chute. It includes an extruder and a dryer. A protective cover is fixedly connected to the housing at the extruder's discharge port. The dryer has a feed inlet, and a chute is fixedly installed at the feed inlet. The protective cover is located directly above the chute. A calcium stearate emulsion spray pipe is fixedly installed inside the protective cover, and the spray pipe has at least three spray holes facing the discharge end of the extruder shaft. This utility model has a reasonable and compact structure, is easy to use, and uniformly sprays calcium stearate emulsion around the discharge end of the extruder shaft, achieving the purpose of preventing adhesive buildup at the extruder outlet and on the inner wall of the chute. It is safe and reliable, facilitates operation, improves work efficiency, greatly reduces equipment blockage and operator workload, and ensures stable operation of the device.

Description

Technical Field

[0001] This utility model relates to the technical field of anti-adhesion devices for rubber, and is a device for preventing adhesive from sticking to the outlet of a rubber extruder and the outlet chute. Background Technology

[0002] Due to the inherent viscosity of rubber, and based on the operational experience of various rubber production plants in China, stable and continuous production in the post-processing section of rubber plants has consistently been unsuccessful. Due to material properties, some of the rubber extruder outlet material is granular with relatively low moisture content and contains a significant amount of rubber debris. This debris is highly viscous and easily adheres to the extruder shaft and the inner wall of the discharge chute when splashed out of the extruder outlet. If not cleaned promptly, this increased rubber buildup can cause blockages at the extruder outlet or dryer inlet, leading to dryer material shortages, rubber plasticization, and significant processing difficulties, time-consuming procedures, and high labor intensity for workers. Prolonged cleaning also disrupts the plant's production balance.

[0003] Patent document CN215969989U discloses an extruder for preventing material adhesion. The key technical points are: it includes an extruder body with a discharge pipe at one end, sidewall separation devices on both sides of the discharge pipe, and a high-pressure cleaning device at the top of the discharge pipe. The sidewall separation device includes a heat production module with a flow pipe at its top. The high-pressure cleaning device accelerates the material flow from the top of the discharge pipe downwards while simultaneously removing material from the inner wall of the pipe. The sidewall separation device reduces the adhesion between the material and the sidewall of the discharge pipe, preventing material adhesion and interference with normal flow, thus avoiding pipe blockage and slowing down the material's cooling and solidification rate, maintaining sufficient fluidity to prevent material adhesion to the discharge pipe. This patent document addresses equipment modification for rubber secondary processing companies to reduce rubber residue buildup; however, the device suffers from complex structure, high modification difficulty, and high modification costs.

[0004] Patent document CN220593988U discloses an anti-sticking plastic extruder, which relates to the field of plastic processing technology. A first motor is fixedly mounted on the top wall of the feed cylinder, and its output end passes through the feed cylinder and is fixedly mounted on a first rotating shaft. A first spiral blade is fixedly mounted on the first rotating shaft. An "L"-shaped scraper is fixedly mounted on the outer ring wall of the first rotating shaft, and the "L"-shaped scraper is in contact with the inner ring wall of the feed cylinder. An inclined scraper is fixedly mounted on the bottom wall of the "L"-shaped scraper, and the inclined scraper is in contact with the inclined inner ring wall of the feed cylinder. A third motor is fixedly mounted on the top wall of the feed cylinder, and a first gear is fixedly mounted on the output end of the third motor. This facilitates the scraping of plastic residue on the feed cylinder, preventing sticking and improving work efficiency. This patent document targets plastic processing enterprises, using scrapers for scraping through equipment modification. However, this device suffers from complex structure, high modification costs, and low scraping efficiency.

[0005] Patent document CN222004088U discloses a spray anti-sticking pelletizing mechanism for an extruder. It includes a die installed at the barrel outlet and a pelletizing knife installed outside the die. It also includes a pelletizing shroud located outside the die. One side of the shroud has an atomizing nozzle for generating spray to cool the plastic pellets, and the other side has a plastic pellet outlet. The bottom of the shroud has a receiving plate for receiving the plastic pellets and guiding them to the outlet. A discharge trough for plastic pellets is connected to the outside of the outlet. The bottom plate of the discharge trough has several rows of drainage holes, the diameter of which is smaller than the diameter of the plastic pellets. The bottom of the bottom plate has a water collection hopper covering these drainage holes, and the bottom of the water collection hopper has a return pipe. This patent document is aimed at plastic processing enterprises, using a cooling atomizing nozzle, but it cannot solve the problem of rubber sticking more easily, and modification is difficult. Summary of the Invention

[0006] This utility model provides a device to prevent rubber from sticking to the outlet of a rubber extruder and the outlet chute, overcoming the shortcomings of the prior art. It can effectively solve the problem that in the rubber production process, some rubber material at the extruder outlet easily adheres to the extruder shaft and the inner wall of the discharge chute. If not cleaned in time, it can easily cause equipment blockage and shutdown, which is difficult to handle, time-consuming, labor-intensive, and affects the operation of the equipment.

[0007] The technical solution of this utility model is achieved through the following measures: a device for preventing adhesive from sticking to the outlet of a rubber extruder and the outlet chute, comprising an extruder and a dryer, a protective cover is fixedly connected to the housing at the outlet of the extruder, an inlet is provided on the dryer, a chute is fixedly installed on the inlet of the dryer, the protective cover is located directly above the chute, a calcium stearate emulsion spray pipe is fixedly installed inside the protective cover, and at least three spray holes are provided on the calcium stearate emulsion spray pipe, the spray holes being directly opposite the outlet end of the extruder shaft.

[0008] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution: The aforementioned calcium stearate emulsion spray pipe is an arc-shaped pipe with its opening facing downwards and both ends blocked. The calcium stearate emulsion spray pipe is wrapped around the outside of the extruder shaft; and / or, the spray holes include axial spray holes and radial spray holes. At least two vertical axial spray holes are provided at circumferential intervals on the inner side of the calcium stearate emulsion spray pipe, and at least one horizontal radial spray hole is provided on the right side of the calcium stearate emulsion spray pipe adjacent to two axial spray holes.

[0009] The above-mentioned calcium stearate emulsion spray pipe and the protective cover are fixedly connected by at least two support plates; or / and, the upper part of the chute is a funnel shape with a larger top and a smaller bottom; or / and, at least one cutter is fixedly installed at the discharge end of the extruder shaft; or / and, the protective cover is a U-shaped cover with the opening facing downward.

[0010] The above also includes a calcium stearate emulsion storage tank and an injector. The calcium stearate emulsion storage tank has a liquid outlet at the bottom, an air inlet at the left end of the injector, a liquid inlet at the top end of the injector, and a discharge end at the right end of the injector. An air inlet pipe is fixedly connected to the air inlet of the injector. A liquid inlet pipe is fixedly connected between the liquid outlet of the calcium stearate emulsion storage tank and the liquid inlet of the injector. A liquid outlet pipe is fixedly connected between the discharge end of the injector and the calcium stearate emulsion spray pipe.

[0011] The above-mentioned valves and flow meters are fixedly installed on the liquid inlet pipe; or / and, valves are fixedly installed on the air inlet pipe.

[0012] The above-mentioned first motor is located on the outside of the extruder, and the power output shaft of the first motor is fixedly installed together with the shaft of the extruder; or / and a second motor is located on the outside of the dryer, and the power output end of the second motor is fixedly installed together with the power input end of the dryer; or / and a first support is fixedly installed at the bottom of the extruder, and a second support is fixedly installed at the bottom of the dryer.

[0013] This utility model has a reasonable and compact structure and is easy to use. By using an extruder, a dryer, a calcium stearate emulsion spray pipe, and a chute in combination, calcium stearate emulsion is evenly sprayed around the discharge end of the extruder shaft, which achieves the purpose of preventing glue from sticking to the outlet of the extruder and the inner wall of the chute. It has the characteristics of safety and reliability, facilitates operation, improves work efficiency, greatly reduces equipment blockage and downtime, reduces the labor intensity of operators, and ensures the stable operation of the device. Attached Figure Description

[0014] Appendix Figure 1 This is a schematic diagram of the front view of the partial cross-sectional structure of the present invention during operation.

[0015] Appendix Figure 2 For the appendix Figure 1 Enlarged right-side view of the structure at the discharge end of the extrusion press shaft.

[0016] The codes in the attached diagram are as follows: 1 is the extruder, 2 is the dryer, 3 is the protective cover, 4 is the chute, 5 is the calcium stearate emulsion spray pipe, 6 is the axial spray hole, 7 is the radial spray hole, 8 is the shaft, 9 is the support plate, 10 is the cutter, 11 is the calcium stearate emulsion storage tank, 12 is the ejector, 13 is the air inlet pipe, 14 is the liquid inlet pipe, 15 is the liquid outlet pipe, 16 is the valve, 17 is the flow meter, 18 is the first motor, 19 is the second motor, 20 is the first support, and 21 is the second support. Detailed Implementation

[0017] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0018] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0019] The present invention will be further described below with reference to the embodiments and accompanying drawings: As attached Figure 1 , 2 As shown, the device for preventing rubber from sticking to the extruder outlet and outlet chute of the rubber device includes an extruder 1 and a dryer 2. A protective cover 3 is fixedly connected to the housing at the discharge port of the extruder 1. The dryer 2 is provided with a feed inlet. A chute 4 is fixedly installed on the feed inlet of the dryer 2. The protective cover 3 is located directly above the chute 4. A calcium stearate emulsion spray pipe 5 is fixedly installed inside the protective cover 3. The calcium stearate emulsion spray pipe 5 is provided with at least three spray holes, which are directly opposite the discharge end of the shaft 8 of the extruder 1. The extruder 1 and the dryer 2 are existing and publicly known components. In this way, by using the extruder 1, the dryer 2, the calcium stearate emulsion spray pipe 5 and the chute 4 in combination, calcium stearate emulsion is evenly sprayed around the discharge end of the shaft 8 of the extruder 1, which achieves the purpose of preventing glue from sticking to the outlet of the extruder 1 and the inner wall of the chute 4. It has the characteristics of safety and reliability, facilitates operation, improves work efficiency, greatly reduces equipment blockage and shutdown and the labor intensity of operators, and ensures the stable operation of the equipment.

[0020] The above-mentioned device for preventing rubber from sticking to the extruder outlet and outlet chute of the rubber processing unit can be further optimized and / or improved according to actual needs: As attached Figure 1 , 2As shown, the calcium stearate emulsion spray pipe 5 is an arc-shaped pipe with its opening facing downward and both ends blocked. The calcium stearate emulsion spray pipe 5 surrounds the shaft 8 of the extruder 1; or / and, the spray holes include axial spray holes 6 and radial spray holes 7. At least two vertical axial spray holes 6 are provided at circumferential intervals on the inner side of the calcium stearate emulsion spray pipe 5, and at least one horizontal radial spray hole 7 is provided on the right side of the calcium stearate emulsion spray pipe 5 between two adjacent axial spray holes 6. The calcium stearate emulsion spray pipe 5 facilitates the spraying of calcium stearate emulsion with a concentration of 1% to 10%; there can be four axial spray holes 6 with an inner diameter of 2mm, and three radial spray holes 7 with an inner diameter of 2mm; during operation, the calcium stearate emulsion with a concentration of 1% to 10% is sprayed through the axial spray holes 6 and the radial spray holes 7 onto the shaft 8 at the rubber extrusion position and the inner wall of the chute 4, using the dispersibility of the calcium stearate emulsion to prevent the rubber from sticking to the equipment; the diameter of the calcium stearate emulsion spray pipe 5 can be 8mm, and the length can be 2 / 3 of the circumference of the protective cover 3.

[0021] As attached Figure 1 , 2 As shown, at least two support plates 9 are fixedly connected between the calcium stearate emulsion spray pipe 5 and the protective cover 3; or / and, the upper part of the chute 4 is a funnel shape with a larger top and a smaller bottom; or / and, at least one cutter 10 is fixedly installed at the discharge end of the shaft 8 of the extruder 1; or / and, the protective cover 3 is a U-shaped cover with the opening facing downwards. The support plate 9 can also be a support pipe; the cutter 10 facilitates better cutting of the rubber material.

[0022] As attached Figure 1 As shown, the system also includes a calcium stearate emulsion storage tank 11 and an injector 12. The calcium stearate emulsion storage tank 11 has a liquid outlet at its bottom, the injector 12 has an air inlet at its left end, a liquid inlet at its upper end, and a discharge end at its right end. An air inlet pipe 13 is fixedly connected to the air inlet of the injector 12. A liquid inlet pipe 14 is fixedly connected between the liquid outlet of the calcium stearate emulsion storage tank 11 and the liquid inlet of the injector 12. A liquid outlet pipe 15 is fixedly connected between the discharge end of the injector 12 and the calcium stearate emulsion spray pipe 5. The injector 12 is a known and commonly used component. The calcium stearate emulsion in the liquid inlet pipe 14 can flow using the liquid level of the calcium stearate emulsion storage tank 11.

[0023] As attached Figure 1 As shown, a valve 16 and a flow meter 17 are fixedly installed on the liquid inlet pipe 14; or / and, a valve 16 is fixedly installed on the air inlet pipe 13. The valve 16 on the liquid inlet pipe 14 can be a pneumatic valve or a solenoid valve, and the valve 16 can be interlocked and adjusted according to the flow meter 17.

[0024] As attached Figure 1As shown, a first motor 18 is located on the outside of the extruder 1, and the power output shaft 8 of the first motor 18 is fixedly installed together with the shaft 8 of the extruder 1; or / and, a second motor 19 is located on the outside of the dryer 2, and the power output end of the second motor 19 is fixedly installed together with the power input end of the dryer 2; or / and, a first support 20 is fixedly installed at the bottom of the extruder 1, and a second support 21 is fixedly installed at the bottom of the dryer 2. The first support 20 facilitates the stable installation of the extruder 1; the second support 21 facilitates the stable installation of the dryer 2.

[0025] Advantages of this utility model: (1) Using the injector 12, the industrial air in the air inlet pipe 13 is used as the power source to draw the calcium stearate emulsion with a concentration of 1% to 10% (calcium stearate has good dispersibility and can effectively prevent agglomeration in the rubber production process) from the calcium stearate emulsion storage tank 11 and spray it evenly to the discharge end of the shaft 8 of the extruder 1 and the inner wall of the chute 4. The dispersibility of the calcium stearate emulsion is used to prevent the rubber material from sticking to the equipment.

[0026] (2) This utility model utilizes the dispersibility and anti-sticking properties of calcium stearate emulsion. By installing a calcium stearate emulsion spray pipe 5 and axial spray holes 6 and radial spray holes 7 on it, the frequency of material blockage at the outlet of the extruder 1 is significantly reduced, and the intensity of manual inspection and cleaning time are reduced. It can be widely used in various rubber production equipment, which can significantly improve production stability, ensure production balance, reduce enterprise operating costs, and improve production efficiency and economic benefits. It is expected to become a key technology for solving the problem of adhesive sticking in the rubber production industry and help the industry achieve efficient and stable production. Compared with the existing technology, the structure of this device is simpler, the operation is more stable, and the frequency of material blockage, the number of on-site inspections, and the labor intensity of maintenance due to material blockage are greatly reduced, ensuring the long-term stable operation of the equipment.

[0027] The technical effects achieved by this utility model are: (1) Taking 2021 as an example, the existing equipment experienced 11 blockages in 21 days of production; after this utility model is put into production, there was only one blockage in 45 days of production in 2023. Assuming that the planned production days are 300 days per year, the blockage frequency in 2021 is approximately 300 ÷ 21 × 11 = 157 times per year, and the blockage frequency in 2023 is approximately 300 ÷ 45 × 1 = 7 times per year. The comprehensive loss caused by each blockage, including defective glue, waste glue, and maintenance costs, is approximately RMB 10,000. Therefore, this utility model can save approximately (157 - 7) × 1 × 3 = RMB 4.5 million in downtime losses over 3 years by reducing blockages, which greatly reduces production costs.

[0028] (2) After this utility model was put into production, it reduced the labor intensity of personnel. The original requirement of personnel to be on-site 24 hours a day to manually clean the adhesive was reduced to the point where personnel no longer needed to be on-site to clean it. Inspections were conducted every two hours, which greatly reduced the labor intensity of operators and ensured the stable operation of the device.

[0029] The above technical features constitute the preferred embodiment of this utility model, which has strong adaptability and the best implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A device for preventing adhesive from sticking to the outlet of a rubber extruder and the outlet chute, characterized in that... The device includes an extruder and a dryer. A protective cover is fixedly connected to the housing at the outlet of the extruder. The dryer has a feed inlet and a chute is fixedly installed at the feed inlet of the dryer. The protective cover is located directly above the chute. A calcium stearate emulsion spray pipe is fixedly installed inside the protective cover. The calcium stearate emulsion spray pipe has at least three spray holes, which are directly opposite the discharge end of the extruder shaft.

2. The device for preventing adhesive from sticking to the outlet of the rubber extruder and the outlet chute according to claim 1, characterized in that... The calcium stearate emulsion spray pipe is an arc-shaped pipe with its opening facing downward and both ends blocked. The calcium stearate emulsion spray pipe is wrapped around the shaft of the extruder; and / or the spray holes include axial spray holes and radial spray holes. At least two vertical axial spray holes are provided at circumferential intervals on the inner side of the calcium stearate emulsion spray pipe, and at least one horizontal radial spray hole is provided on the right side of the calcium stearate emulsion spray pipe between two adjacent axial spray holes.

3. The device for preventing adhesive from sticking to the outlet of the rubber extruder and the outlet chute according to claim 1 or 2, characterized in that... At least two support plates are fixedly connected between the calcium stearate emulsion spray pipe and the protective cover; or / and, the upper part of the chute is a funnel shape with a larger top and a smaller bottom; or / and, at least one cutter is fixedly installed at the discharge end of the extruder shaft; or / and, the protective cover is a U-shaped cover with the opening facing downwards.

4. The device for preventing adhesive from sticking to the outlet of the rubber extruder and the outlet chute according to claim 1 or 2, characterized in that... It also includes a calcium stearate emulsion storage tank and an injector. The calcium stearate emulsion storage tank has a liquid outlet at the bottom, an air inlet at the left end of the injector, a liquid inlet at the top end of the injector, and a discharge end at the right end of the injector. An air inlet pipe is fixedly connected to the air inlet of the injector. An inlet pipe is fixedly connected between the liquid outlet of the calcium stearate emulsion storage tank and the liquid inlet of the injector. An outlet pipe is fixedly connected between the discharge end of the injector and the calcium stearate emulsion spray pipe.

5. The device for preventing adhesive from sticking to the outlet of the rubber extruder and the outlet chute according to claim 3, characterized in that... It also includes a calcium stearate emulsion storage tank and an injector. The calcium stearate emulsion storage tank has a liquid outlet at the bottom, an air inlet at the left end of the injector, a liquid inlet at the top end of the injector, and a discharge end at the right end of the injector. An air inlet pipe is fixedly connected to the air inlet of the injector. An inlet pipe is fixedly connected between the liquid outlet of the calcium stearate emulsion storage tank and the liquid inlet of the injector. An outlet pipe is fixedly connected between the discharge end of the injector and the calcium stearate emulsion spray pipe.

6. The device for preventing adhesive from sticking to the outlet of the rubber extruder and the outlet chute according to claim 4, characterized in that... A valve and a flow meter are fixedly installed on the liquid inlet pipe; or / and a valve is fixedly installed on the air inlet pipe.

7. The device for preventing adhesive from sticking to the outlet of the rubber extruder and the outlet chute according to claim 5, characterized in that... A valve and a flow meter are fixedly installed on the liquid inlet pipe; or / and a valve is fixedly installed on the air inlet pipe.

8. The device for preventing adhesive from sticking to the outlet of the rubber extruder and the outlet chute according to claim 1 or 2, characterized in that... A first motor is located on the outside of the extruder, and the power output shaft of the first motor is fixedly installed together with the shaft of the extruder; or / and a second motor is located on the outside of the dryer, and the power output end of the second motor is fixedly installed together with the power input end of the dryer; or / and a first support is fixedly installed at the bottom of the extruder, and a second support is fixedly installed at the bottom of the dryer.

9. The device for preventing adhesive from sticking to the outlet of the rubber extruder and the outlet chute according to claim 3, characterized in that... A first motor is located on the outside of the extruder, and the power output shaft of the first motor is fixedly installed together with the shaft of the extruder; or / and a second motor is located on the outside of the dryer, and the power output end of the second motor is fixedly installed together with the power input end of the dryer; or / and a first support is fixedly installed at the bottom of the extruder, and a second support is fixedly installed at the bottom of the dryer.

10. The device for preventing adhesive from sticking to the outlet of the rubber extruder and the outlet chute according to claim 7, characterized in that... A first motor is located on the outside of the extruder, and the power output shaft of the first motor is fixedly installed together with the shaft of the extruder; or / and a second motor is located on the outside of the dryer, and the power output end of the second motor is fixedly installed together with the power input end of the dryer; or / and a first support is fixedly installed at the bottom of the extruder, and a second support is fixedly installed at the bottom of the dryer.

Images