Novel low-temperature internal mixer for mixing fluorosilicone rubber

Abstract

The utility model discloses a novel low-temperature internal mixer for mixing fluorosilicone rubber, and relates to the field of feeding and mixing of the fluorosilicone rubber. The novel low-temperature internal mixer comprises a rack, an internal mixing outer shell is mounted on the rack, an internal mixing rotor is arranged in the internal mixing outer shell, a driving device is mounted on the rack on the right side of the internal mixing outer shell, and the driving device is connected with the internal mixing rotor; a sizing material inlet and outlet is formed in the upper side of the internal mixing outer shell, a material pressing cylinder is arranged on the rack above the internal mixing outer shell, and a material pressing cover matched with the sizing material inlet and outlet is arranged at the lower end of a piston rod of the material pressing cylinder; a shell cooling sleeve is arranged on the outer side of the internal mixing outer shell, a material pressing cooling sleeve is arranged on the upper side of the material pressing cover, and a cooling water supply pipe and a cooling water return pipe are connected to the shell cooling sleeve and the material pressing cooling sleeve respectively. The mixer has the advantages of high feeding speed, high mixing efficiency, difficulty in loss and failure of auxiliaries and the like.

Description

Technical Field

[0001] The utility model relates to the field of feeding and mixing of fluorosilicone rubber, in particular to a novel low-temperature internal mixer for mixing fluorosilicone rubber with fast feeding speed and not easy to lose and inactivate the additives. Background Art

[0002] Mixing refers to the process of adding various additives such as fillers, internal mold release agents, accelerators, vulcanizing agents, and anti-aging agents into raw rubber or plastic rubber. In order to ensure the consistency of the properties of the rubber compound, it is necessary to disperse the various additives evenly.

[0003] At present, the feeding and mixing of fluorosilicone rubber generally includes two processes: pretreatment of the rubber compound and feeding and refining. The pretreatment process of the rubber compound is as follows: in a kneader, the material is fed by the extrusion and kneading of two rotors, and then the temperature is raised and the vacuum is pumped to remove some low-boiling substances and water in the fluorosilicone rubber to improve the performance of the fluorosilicone rubber. The feeding and refining process can be divided into mixing with an open mill and low-temperature mixing with a kneader; adding the pretreated fluorosilicone rubber and additives into an open mill for mixing has the defects of slow feeding speed and low efficiency; when adding the pretreated fluorosilicone rubber and additives into a low-temperature kneader for low-temperature mixing, when using oily and paste-like additives (such as internal mold release agents and vulcanizing agents), the fluorosilicone rubber will be dispersed into small pieces and slip and idle in the kneader, with extremely slow feeding and low mixing efficiency. During the long-term mixing process, due to the friction and shear effects, the temperature of the rubber compound rises relatively fast, which easily causes the loss or inactivation of the additives. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies of the above-mentioned prior art, and provide a novel low-temperature internal mixer for mixing fluorosilicone rubber with fast feeding speed, high mixing efficiency, not easy to quickly heat up the rubber compound, and not easy to lose and inactivate the additives.

[0005] The technical solution of the utility model is as follows:

[0006] A novel low-temperature internal mixer for mixing fluorosilicone rubber, including a frame, an internal mixing outer shell is installed on the frame, an internal mixing rotor is arranged in the internal mixing outer shell, a driving device is installed on the frame on the right side of the internal mixing outer shell, and the driving device is connected with the internal mixing rotor. It is characterized in that a rubber compound inlet and outlet is arranged on the upper side of the internal mixing outer shell, a pressing cylinder is arranged on the frame above the internal mixing outer shell, and a pressing cover matching with the rubber compound inlet and outlet is arranged at the lower end of the piston rod of the pressing cylinder; a shell cooling jacket is arranged on the outer side of the internal mixing outer shell, a pressing cooling jacket is arranged on the upper side of the pressing cover, and a cooling water supply pipe and a cooling water return pipe are respectively connected to the shell cooling jacket and the pressing cooling jacket.

[0007] A rubber compound placing groove opening matching with the pressing cover is arranged on the rubber compound inlet and outlet of the utility model, and the pressing cover can slide up and down in the rubber compound placing groove opening.

[0008] In the present utility model, a left support seat and a right support seat are provided on the frame. The left and right ends of the internal mixer outer shell are respectively connected to the left support seat and the right support seat through a left bearing and a right bearing. The driving device is arranged on the right side of the right support seat, and the output shaft of the driving device passes through the right bearing and is connected to the internal mixer rotor. A flipping driving device is arranged on the left side of the left bearing, and the flipping driving device is connected to the internal mixer outer shell.

[0009] In the present utility model, a cooling water supply pipe and a cooling water return pipe are provided on the frame. First sliding sleeves and second sliding sleeves are respectively provided on the frame on the front and rear sides of the pressure cylinder. Water inlet sliding pipes and water return sliding pipes that can slide freely up and down are respectively arranged in the first sliding sleeves and the second sliding sleeves. The lower ends of the water inlet sliding pipes and the water return sliding pipes are respectively connected to the pressure material cooling sleeve. First connecting pipelines and second connecting pipelines connected to the cooling water supply pipe and the cooling water return pipe are provided on the frame on one side of the first sliding sleeves and the second sliding sleeves. The first connecting pipelines and the second connecting pipelines are respectively connected to the upper ends of the water inlet sliding pipes and the water return sliding pipes through a first buffer hose and a second buffer hose.

[0010] In the present utility model, a cooling water inlet joint is provided on the housing cooling sleeve at the front part under the internal mixer outer shell, and a cooling water outlet joint is provided on the housing cooling sleeve at the upper part on the front side of the internal mixer outer shell. Third connecting pipelines and fourth connecting pipelines connected to the cooling water supply pipe and the cooling water return pipe are provided on the frame at the rear part under the internal mixer outer shell. The third connecting pipeline is connected to the cooling water inlet joint through a third buffer hose arranged in the front-back direction, and the fourth connecting pipeline is connected to the cooling water outlet joint through a fourth buffer hose extending forward and then upward.

[0011] In the present utility model, a cooling diversion pipe arranged in a ring shape is provided on the inner side wall at the upper part of the housing cooling sleeve. The cooling water outlet joint is communicated with the cooling diversion pipe at the front part of the housing cooling sleeve, and cooling water return holes are provided on the cooling diversion pipe at the rear part of the housing cooling sleeve.

[0012] When the present utility model is in use, the pretreated fluorosilicone rubber and additives are added into the internal mixer outer shell through the rubber material inlet and outlet.

[0013] The pressure cylinder drives the pressure cover to move downward, applying a downward pressure to the rubber material, and the rubber material can be quickly pressed into the internal mixer outer shell for mixing. Due to the extrusion and limiting effects of the lower side surface of the pressure cover on the rubber material, even if oily and paste-like additives are used, the fluorosilicone rubber is dispersed into small pieces and is not likely to slip and idle in the internal mixer outer shell, improving the mixing efficiency. By connecting cooling water (tap water, circulating radiator) through the cooling water supply pipe and the cooling water return pipe, the rubber material being mixed inside the internal mixer outer shell can be comprehensively cooled, preventing the temperature of the rubber material from rising rapidly and avoiding the loss or invalidation of additives due to temperature increase. Description of the Drawings

[0014] Figure 1 It is a front view structural schematic diagram of the present utility model.

[0015] Figure 2 It is a top view structural schematic diagram of the present utility model.

[0016] Figure 3 is Figure 1 A-A sectional view structural schematic diagram of Specific embodiments

[0017] Such as Figures 1 - 3 shown in the novel low-temperature internal mixer for fluorosilicone rubber mixing, which includes a frame 10, an internal mixer housing 29 is installed on the frame 10, two mutually cooperating internal mixer rotors 26 are arranged inside the internal mixer housing 29, a driving device 9 is installed on the frame 10 on the right side of the internal mixer housing 29, and the driving device 9 is connected to the internal mixer rotor 26 for driving it to rotate; the above structure is the same as the prior art and will not be elaborated. The characteristics of the present utility model are that a rubber material inlet and outlet is provided on the upper side of the internal mixer housing 29, and a vertically arranged sleeve-shaped rubber material placing groove is provided on the rubber material inlet and outlet; a pressing cylinder 6 is provided on the frame 10 above the internal mixer housing 29, the pressing cylinder 6 is a pneumatic cylinder, and the pressing cylinder 6 can also be a hydraulic cylinder or an electric cylinder. The lower end of the piston rod 23 of the pressing cylinder 6 is provided with a pressing cover 25 that can slide up and down in the rubber material placing groove and cooperate with the rubber material inlet and outlet. The lower side surface of the pressing cover 25 is an arc surface that cooperates with the internal mixer rotor 26; a sealing ring that cooperates with the side wall of the pressing cover is provided on the inner side wall of the rubber material placing groove. A housing cooling sleeve 12 is provided on the outer side of the internal mixer housing 29, and a pressing cooling sleeve 24 is provided on the upper side of the pressing cover 25. Cooling water supply pipes 17 and cooling water return pipes 18 are respectively connected to the housing cooling sleeve 12 and the pressing cooling sleeve 24.

[0018] In this embodiment, a left support seat and a right support seat 11 are provided on the lower part of the frame 10, and the left and right ends of the internal mixer housing 29 are respectively connected to the left support seat and the right support seat 11 through a left bearing 2 and a right bearing 7; from Figure 1 , Figure 2It can be seen that the left and right ends of the internal mixer housing 29 are respectively connected to the left bearing 2 and the right bearing 7 via connectors. The left bearing 2 and the right bearing 7 are slewing bearings. The driving device 9 is arranged on the right side of the right support seat 11. The output shaft of the driving device 9 is connected to a speed reducer 8. The output shaft of the speed reducer 8 sequentially passes through the right bearing 7 and the connector and then is connected to the internal mixer rotor 26. A flipping driving device 1 is provided on the lower part of the frame 10 on the left side of the left bearing 2. The flipping driving device 1 is connected to the internal mixer housing and is used to drive its flipping. The driving device 9 can be an electric motor, a hydraulic motor or a pneumatic motor. The flipping driving device 1 can be an electric motor, a cylinder or an oil cylinder. When the flipping driving device 1 is an electric motor, the motor shaft passes through the left bearing and is connected to the internal mixer housing or directly connected to the rotating ring of the left bearing. When the flipping driving device 1 is a cylinder or an oil cylinder, the flipping driving device 1 is horizontally arranged in the front-rear direction on the lower part of the frame 10. A flipping swing rod is hinged to its piston rod. The flipping swing rod is connected to the internal mixer housing via a horizontally arranged connecting shaft or directly connected to the rotating ring of the left bearing. The fixed ring of the left bearing is fixedly connected to the left support seat. The work of the flipping driving device can drive the internal mixer housing to flip forward by 100-150°, which is convenient for the discharge of the fluorosilicone rubber after mixing and improves work efficiency.

[0019] The structure in which a cooling water supply pipe and a cooling water return pipe are connected to the housing cooling sleeve is as follows: A cooling water inlet joint 30 is provided on the housing cooling sleeve 12 at the front part of the lower side of the internal mixer housing 29. A cooling water outlet joint 27 is provided on the housing cooling sleeve 12 at the upper part of the front side of the internal mixer housing 29. On the frame below the rear part of the internal mixer housing 29, there are a third connecting pipeline 16 and a fourth connecting pipeline 15 connected to the cooling water supply pipe 17 and the cooling water return pipe 18. The third connecting pipeline 16 is connected to the cooling water inlet joint 30 via a third buffer hose 31 arranged in the front-rear direction. The fourth connecting pipeline 15 is connected to the cooling water outlet joint 27 via a fourth buffer hose 13 that extends forward and then upward under the housing cooling sleeve. Further improvement: An annular cooling diversion pipe 28 is provided on the inner side wall of the upper part of the housing cooling sleeve 12. The cooling water outlet joint 27 is communicated with the cooling diversion pipe 28 at the front part of the housing cooling sleeve. A cooling water return hole is provided on the cooling diversion pipe 28 at the rear part of the housing cooling sleeve. Cooling water enters the housing cooling sleeve 12 from the cooling water inlet joint 30 at the front part of the lower side of the internal mixer housing, is diverted by the cooling water return hole and the cooling diversion pipe 28 at the upper part of the rear side and then flows out from the cooling water outlet joint 27. The cooling efficiency is high and the effect is good. Buffer notches 14 are provided on the lower part of the frame 10 below the third buffer hose 31 and the fourth buffer hose 13. The third buffer hose 31 and the fourth buffer hose 13 can freely slide into and out of the buffer notches 14 to avoid extrusion of the third buffer hose 31 and the fourth buffer hose 13 during the flipping process of the internal mixer housing.

[0020] The structure in which a cooling water supply pipe and a cooling water return pipe are connected to the pressure-feeding cooling sleeve is as follows: A cooling water supply pipe 17 and a cooling water return pipe 18 are provided on the frame. First sliding sleeves and second sliding sleeves are respectively provided on the frame on the front and rear sides of the pressure-feeding cylinder 6. An inlet water sliding pipe 3 and a return water sliding pipe 22 that can freely slide up and down are respectively arranged in the first sliding sleeve and the second sliding sleeve. The lower ends of the inlet water sliding pipe 3 and the return water sliding pipe 22 are respectively connected to the pressure-feeding cooling sleeve 24. On the frame on the left side of the first sliding sleeve and the second sliding sleeve, a first connecting pipe 20 and a second connecting pipe 19 connected to the cooling water supply pipe 17 and the cooling water return pipe 18 are provided. The first connecting pipe 20 and the second connecting pipe 19 are respectively connected to the upper ends of the inlet water sliding pipe 3 and the return water sliding pipe 22 through a first buffer hose 4 and a second buffer hose 21. As can be seen from Figure 1 , Figure 2 , on the frame on the left side of the first sliding sleeve and the second sliding sleeve, first vertical pipes 5 and second vertical pipes connected to the first connecting pipe 20 and the second connecting pipe 19 are respectively provided vertically. One ends of the first buffer hose 4 and the second buffer hose 21 are respectively connected to the upper ends of the first vertical pipe 5 and the second vertical pipe, preventing the first buffer hose 4 and the second buffer hose 21 from interfering with other parts when swinging up and down, and making the operation more stable.

[0021] When the present utility model is used, the pretreated fluorosilicone rubber and additives are added into the internal mixer housing from the rubber material placing notch on the upper side of the rubber material inlet and outlet. The rubber material placing notch can play a role in caching the fluorosilicone rubber and additives. The pressure-feeding cylinder drives the pressure-feeding cover to move downward, applying a downward pressure to the rubber material, and quickly pressing the rubber material into the internal mixer housing for mixing. Due to the extrusion and limiting effects of the lower side of the pressure-feeding cover on the rubber material, even if oily and paste-like additives are used and the fluorosilicone rubber is dispersed into small pieces, it is not easy to slip and idle in the internal mixer housing, improving the mixing efficiency. Connect the cooling water supply pipe and the cooling water return pipe to the tap water pipeline and the cooling water recovery tank respectively, and introduce flowing cooling water into the housing cooling sleeve and the pressure-feeding cooling sleeve, which can comprehensively cool the rubber material being mixed inside the internal mixer housing, prevent the temperature of the rubber material from rising rapidly, and avoid the loss or invalidation of additives due to temperature rise.

Claims

1. A new low-temperature internal mixer for mixing fluorosilicone rubber, comprising a frame, a mixing outer shell is mounted on the frame, a mixing rotor is arranged in the mixing outer shell, a driving device is mounted on the frame on the right side of the mixing outer shell, and the driving device is connected to the mixing rotor, characterized in that: A rubber inlet and outlet are arranged on the upper side of the internal mixing outer shell, a pressing cylinder is arranged on the frame above the internal mixing outer shell, and a pressing cover which cooperates with the rubber inlet and outlet is arranged at the lower end of the piston rod of the pressing cylinder; a shell cooling jacket is arranged on the outer side of the internal mixing outer shell, and a pressing cooling jacket is arranged on the upper side of the pressing cover, and the shell cooling jacket and the pressing cooling jacket are respectively connected with a cooling water supply pipe and a cooling water return pipe.

2. The novel low-temperature internal mixer for mixing fluorosilicone rubber according to claim 1, characterized in that: The rubber inlet and outlet are provided with a rubber placing notch matched with the material pressing cover, and the material pressing cover can slide up and down in the rubber placing notch.

3. The novel low-temperature internal mixer for mixing fluorosilicone rubber according to claim 1, characterized in that: The frame is provided with a left support seat and a right support seat, and the left and right ends of the internal kneading outer shell are connected to the left support seat and the right support seat via a left bearing and a right bearing respectively. The driving device is arranged on the right side of the right support seat, and the output shaft of the driving device passes through the right bearing and is connected to the internal kneading rotor; a flip driving device is provided on the left side of the left bearing, and the flip driving device is connected to the internal kneading outer shell.

4. The novel low-temperature internal mixer for mixing fluorosilicone rubber according to claim 3, characterized in that: The frame is provided with a cooling water supply pipe and a cooling water return pipe, and the frames on the front and rear sides of the press cylinder are respectively provided with a first sliding sleeve and a second sliding sleeve, and the first sliding sleeve and the second sliding sleeve are respectively provided with a water inlet slide pipe and a return water slide pipe that can slide freely up and down, and the lower ends of the water inlet slide pipe and the return water slide pipe are respectively connected to the press cooling sleeve; the frame on one side of the first sliding sleeve and the second sliding sleeve is provided with a first connecting pipeline and a second connecting pipeline connected to the cooling water supply pipe and the cooling water return pipe, and the first connecting pipeline and the second connecting pipeline are respectively connected to the upper ends of the water inlet slide pipe and the return water slide pipe through a first buffer hose and a second buffer hose.

5. The novel low-temperature internal mixer for mixing fluorosilicone rubber according to claim 3, characterized in that: A cooling water inlet joint is provided on the shell cooling jacket at the front lower side of the internal kneading shell, a cooling water outlet joint is provided on the shell cooling jacket at the upper front side of the internal kneading shell, a third connecting pipe and a fourth connecting pipe connected to the cooling water supply pipe and the cooling water return pipe are provided on the frame at the rear lower side of the internal kneading shell, the third connecting pipe is connected to the cooling water inlet joint via a third buffer hose arranged in the front-to-back direction, and the fourth connecting pipe is connected to the cooling water outlet joint via a fourth buffer hose extending forward and then upward.

6. The novel low-temperature internal mixer for mixing fluorosilicone rubber according to claim 5, characterized in that: A cooling guide pipe arranged in an annular shape is arranged on the inner side wall of the upper part of the shell cooling jacket, a cooling water outlet joint is connected with the cooling guide pipe at the front part of the shell cooling jacket, and a cooling water return hole is arranged on the cooling guide pipe at the rear part of the shell cooling jacket.

Images