A kind of raw material precision mixing equipment and production process for silicone rubber preparation

Abstract

The present invention relates to the technical field related to silicone rubber preparation equipment, and specifically to a precise raw material mixing equipment for silicone rubber preparation and a production process. The precise raw material mixing equipment for silicone rubber preparation comprises a mixing tank, a lifting module, a mounting beam, a stirring shaft and a stirring rod, and the mixing tank is mounted on the equipment base through legs; the precise raw material mixing equipment for silicone rubber preparation composed of a mixing tank, a lifting module, a mounting beam, a stirring shaft and a stirring rod is arranged, a main air channel is opened on the stirring shaft, and a secondary air hole and a piston cavity are opened on the stirring rod, and a piston, a primary movable rod, a secondary movable rod and a supporting spring are arranged in the piston cavity, so that the piston is moved outward by inflating the main air channel, so that the device can push the scraper assembly on the primary scraper seat to move outward during self-cleaning, so that the scraper assembly can form an auxiliary cleaning effect on the inner wall of the mixing tank through the outside, thereby avoiding residual materials from contaminating subsequent raw materials.

Description

Technical Field

[0001] The present invention relates to the technical field related to silicone rubber preparation equipment, and specifically to a raw material precision mixing equipment and a production process for silicone rubber preparation. Background Art

[0002] Silicone rubber refers to a rubber whose main chain is composed of alternating silicon and oxygen atoms, and the silicon atom is usually connected to two organic groups. Ordinary silicone rubber is mainly composed of siloxane chains containing methyl and a small amount of vinyl. The introduction of phenyl can improve the high and low temperature resistance of silicone rubber, while the introduction of trifluoropropyl and cyano can improve the heat and oil resistance of silicone rubber. Silicone rubber has good low temperature resistance and can generally still work at -55°C. After the introduction of phenyl, it can reach -73°C. The heat resistance of silicone rubber is also outstanding. It can work for a long time at 180°C, and can withstand several weeks or more at slightly above 200°C and still be elastic. It can instantly withstand high temperatures above 300°C. Silicone rubber has good air permeability and the oxygen permeability is the highest among synthetic polymers. In addition, silicone rubber also has the outstanding characteristics of physiological inertness and will not cause coagulation, so it is widely used in the medical field;

[0003] In the actual production process of silicone rubber, a silicone rubber mixer is needed to mix the raw materials. However, the structure of the traditional silicone rubber mixer is relatively simple, and no special self-cleaning structure is set. It usually adds clean water and then performs self-cleaning through the stirring action of the mixer. The cleaning effect is poor. When processing and producing different batches of silicone rubber, a certain amount of the previous batch of materials will adhere to the side wall of the material chamber of the mixer after the previous batch of materials is processed, resulting in a small amount of different types of mixtures in the next batch of materials during the processing, thereby affecting the accuracy of the ingredients, and ultimately resulting in a reduction in product quality. For this reason, the present invention proposes a raw material precision mixing equipment and production process for silicone rubber preparation to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a raw material precision mixing equipment and production process for preparing silicone rubber, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a precise mixing device for raw materials for preparing silicone rubber, the precise mixing device for raw materials for preparing silicone rubber comprising:

[0006] A mixing tank, wherein the mixing tank is mounted on the equipment base via legs;

[0007] A lifting module, wherein the lifting module is installed on a base;

[0008] A mounting beam, wherein the mounting beam is fixedly connected to the telescopic mechanism of the lifting module;

[0009] A stirring shaft, wherein the stirring shaft is rotatably mounted on a mounting beam, and the lower end of the stirring shaft extends into the inner cavity of the mixing tank, a driving motor is fixedly mounted on the mounting beam, a transmission gear is fixedly mounted on the output shaft of the driving motor, and a driven gear is fixedly mounted on the stirring shaft, and the driven gear is meshed with the transmission gear;

[0010] A stirring rod is fixedly mounted on the stirring shaft.

[0011] Preferably, a main air channel is provided on the stirring shaft, a sealed bearing groove is provided at the upper port of the main air channel, a sealed bearing is fixedly installed in the sealed bearing groove, an air pipe is fixedly installed in the inner ring of the bearing of the sealed bearing, the air pipe is a hard steel pipe, and the air pipe is positioned on the mounting beam through a pipe bracket, the end of the air pipe is connected to the air supply port of the air supply equipment through a gas hose, and a pressure relief valve is provided on the air pipe, a primary air hole is provided on the side wall of the main air channel, a secondary air hole and a piston cavity are provided on the stirring rod, and a threaded groove is provided at the port position of the piston cavity.

[0012] Preferably, the primary air hole and the secondary air hole are arranged in alignment, and the piston cavity is connected with the main air channel through the primary air hole and the secondary air hole, a piston is movably installed in the piston cavity, a primary movable rod is integrally formed at the outer end of the piston, and a secondary movable rod is integrally formed at the outer end of the primary movable rod, the cross-section of the piston cavity is a regular polygon, the cross-sectional size of the piston is consistent with the cross-sectional size of the piston cavity, the primary movable rod and the secondary movable rod are sleeved with supporting springs, a limiting piece is screwed and installed in the threaded groove of the piston cavity port, the cross-sectional size of the secondary movable rod is smaller than the cross-sectional size of the primary movable rod, and the primary movable rod movably passes through the center hole on the limiting piece.

[0013] Preferably, a docking seat is integrally formed on the outer end surface of the secondary movable rod, a threaded hole is provided on the docking seat, the cross-section of the docking seat is a regular polygon, and a primary scraper seat is fixedly installed on the docking seat by a positioning bolt, a scraper assembly is installed on the primary scraper seat, a docking groove is provided on the inner side surface of the primary scraper seat, and the docking seat is embedded in the docking groove.

[0014] Preferably, a primary movable groove is provided on the outer end surface of the docking seat, and the scraper assembly is composed of a primary scraper plate and a primary scraper mouth combination, the primary scraper plate is movably arranged in the primary movable groove, and the inner end surface of the primary scraper plate is connected to the bottom of the primary movable groove through an elastic support member, and after the piston cavity is inflated, the primary movable rod moves to abut against the limit member, and at this time, the primary scraper mouth abuts against the inner wall of the mixing tank, and at this time, the elastic support member is in a compressed state.

[0015] Preferably, a connecting rod is integrally formed on the inner side surface of the primary scraper seat, a collar is integrally formed on the connecting rod, the collar is movably mounted on the stirring rod, and the collars are arranged in pairs, and the upper and lower sides of the collars are connected to stirring blades via connecting columns.

[0016] Preferably, the stirring rods are arranged in multiple layers at equal intervals, and three stirring rods are arranged in each layer with equal circumference, and the primary scraper seats on adjacent layers of stirring rods are arranged close to each other, and a gap is left between the lowest primary scraper seat and the bottom surface of the inner cavity of the mixing tank.

[0017] Preferably, a secondary scraper seat is integrally formed at the bottom of the stirring shaft, a secondary movable groove is provided on the secondary scraper seat, the cross-section of the secondary movable groove is an inverted convex shape, and a T-shaped scraper is movably arranged in the secondary movable groove, a supporting airbag is arranged between the top surface of the T-shaped scraper and the secondary movable groove, a tertiary air hole is provided on the bottom side wall of the stirring shaft, the tertiary air hole is connected with the inner cavity of the supporting airbag through a connecting tube, the horizontal plate of the T-shaped scraper is connected to the bottom side wall of the secondary movable groove through a reset spring, and a secondary scraper opening is arranged on the bottom surface of the vertical plate of the T-shaped scraper, when the supporting airbag is not inflated, the reset spring is in a reset state, and at this time, the secondary scraper opening is not in contact with the bottom surface of the inner cavity of the mixing tank, and after the supporting airbag is inflated, the secondary scraper opening is in contact with the bottom surface of the inner cavity of the mixing tank.

[0018] Preferably, the primary scraper opening and the secondary scraper opening are both hard silicone strips, the ports of the secondary movable grooves are fixed to sealing seats by screws, and the side walls of the primary scraper plate and T-shaped scraper are coated with rubber sealing layers.

[0019] A production process for accurately mixing raw materials for preparing silicone rubber, wherein the production process for accurately mixing raw materials for preparing silicone rubber is operated by the above-mentioned accurate mixing equipment for preparing raw materials for preparing silicone rubber, and the production process for accurately mixing raw materials for preparing silicone rubber comprises:

[0020] The loading process, by adding raw materials to the mixing tank;

[0021] In the mixing process, the driving motor drives the stirring shaft to stir and mix the raw materials. In the mixing process, the air supply device is started to inflate and the pressure is released through the pressure relief valve. The alternating operation of the two drives the stirring blade to reciprocate in the horizontal direction. At the same time, the lifting and reciprocating motion of the lifting module allows the stirring blade to move in the up and down directions. In the mixing process, the stirring blade moves simultaneously in multiple dimensions, thereby improving the mixing effect of the raw materials.

[0022] The self-cleaning process is carried out by injecting clean water into the mixing tank and starting the air supply equipment and the drive motor, so that the first-level scraper mouth and the second-level scraper mouth are respectively against the inner cavity side wall and the inner cavity bottom surface of the mixing tank, thereby avoiding the presence of residual material on the side wall of the mixing tank. The multi-dimensional movement of the stirring blade can also effectively improve the self-cleaning effect of the stirring blade.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. A precise raw material mixing device for preparing silicone rubber is provided, which is composed of a mixing tank, a lifting module, a mounting beam, a stirring shaft and a stirring rod. A main airway is provided on the stirring shaft, and a secondary air hole and a piston cavity are provided on the stirring rod. A piston, a primary movable rod, a secondary movable rod and a supporting spring are provided in the piston cavity. By inflating air into the main airway, the piston is moved outward, so that the device can push the scraper assembly on the primary scraper seat to move outward during self-cleaning, thereby forming an auxiliary cleaning effect on the inner wall of the mixing tank through the outside of the scraper assembly, thereby preventing the residual material from contaminating the subsequent raw materials;

[0025] 2. During the mixing process, the air supply device is started to inflate, and the pressure is released through the pressure relief valve, so that the air supply device and the pressure relief valve are operated alternately, thereby driving the stirring blade to reciprocate in the horizontal direction, and at the same time, the lifting and reciprocating motion of the lifting module is used to make the stirring blade reciprocate in the up and down directions, so that the stirring blade can move simultaneously in multiple dimensions during the mixing process, thereby improving the mixing effect of the raw materials, thereby achieving the purpose of improving product quality, and can improve the mixing efficiency of the raw materials and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 for Figure 1 A schematic diagram of the structure enlargement in the middle;

[0028] Figure 3 This is a schematic diagram of the distribution of stirring rods of the present invention;

[0029] Figure 4 for Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0030] Figure 5 A half-section view of the stirring shaft of the present invention;

[0031] Figure 6 for Figure 5 A magnified schematic diagram of the structure at C in the middle;

[0032] Figure 7 for Figure 5A magnified schematic diagram of the structure at D in the middle;

[0033] Figure 8 for Figure 7 The enlarged schematic diagram of the structure at E in the middle;

[0034] Fig. 9 A half-section view of the primary scraper holder of the present invention;

[0035] Fig.10 for Fig. 9 The enlarged schematic diagram of the structure at F in the middle;

[0036] Fig.11 It is a schematic diagram of the structure of the limiter of the present invention;

[0037] Fig.12 This is a schematic diagram of the piston structure of the present invention;

[0038] Fig.13 It is a schematic diagram of the structure of the T-shaped scraper of the present invention;

[0039] Fig.14 for Fig.13 Enlarged schematic diagram of the structure at G in the middle.

[0040] In the figure: mixing tank 1, lifting module 2, mounting beam 3, stirring shaft 4, stirring rod 5, supporting leg 6, driven gear 7, driving motor 8, transmission gear 9, main airway 10, primary air hole 11, piston cavity 12, secondary air hole 13, piston 14, primary movable rod 15, secondary movable rod 16, supporting spring 17, limiting member 18, positioning bolt 19, primary scraper seat 20, scraper assembly 21, primary movable groove 22, elastic support member 23, primary Scraper plate 24, primary scraper mouth 25, connecting rod 28, collar 29, connecting column 30, stirring blade 31, docking seat 32, secondary scraper seat 33, secondary movable groove 34, supporting airbag 35, T-shaped scraper 36, secondary scraper mouth 37, return spring 38, sealing seat 39, rubber sealing layer 40, sealing bearing 41, air supply pipe 42, pipeline bracket 43, sealing bearing groove 44, center hole 45, tertiary air hole 46, connecting pipe 47, etc. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-14 The present invention provides the following three preferred embodiments:

[0043] Embodiment 1

[0044] See also Figure 1-8 , a precise mixing equipment for raw materials for preparing silicone rubber, the precise mixing equipment for raw materials for preparing silicone rubber comprises a mixing tank 1, a lifting module 2, a mounting beam 3, a stirring shaft 4 and a stirring rod 5, the mixing tank 1 is mounted on the equipment base through a support leg 6, the lifting module 2 is mounted on the base, the mounting beam 3 is fixedly connected to the telescopic mechanism of the lifting module 2, the stirring shaft 4 is rotatably mounted on the mounting beam 3, and the lower end of the stirring shaft 4 extends into the inner cavity of the mixing tank 1, a driving motor 8 is fixedly mounted on the mounting beam 3, a transmission gear 9 is fixedly mounted on the output shaft of the driving motor 8, a driven gear 7 is fixedly mounted on the stirring shaft 4, the driven gear 7 is meshed with the transmission gear 9, and the stirring rod 5 is fixedly mounted on the stirring shaft 4. It is fixedly installed on the stirring shaft 4, and a main air duct 10 is opened on the stirring shaft 4. A sealed bearing groove 44 is opened at the upper side port of the main air duct 10. A sealed bearing 41 is fixedly installed in the sealed bearing groove 44. An air pipe 42 is fixedly installed in the inner ring of the bearing of the sealed bearing 41. The air pipe 42 is a hard steel pipe, and the air pipe 42 is positioned on the mounting beam 3 through a pipe bracket 43. The end of the air pipe 42 is connected to the air supply port of the air supply equipment through an air hose, and a pressure relief valve is arranged on the air pipe 42. A primary air hole 11 is opened on the side wall of the main air duct 10, and a secondary air hole 13 and a piston cavity 12 are opened on the stirring rod 5. A threaded groove is opened at the port position of the piston cavity 12.

[0045] The primary air hole 11 and the secondary air hole 13 are arranged in alignment, and the piston cavity 12 is connected to the main air channel 10 through the primary air hole 11 and the secondary air hole 13. A piston 14 is movably installed in the piston cavity 12, and a primary movable rod 15 is integrally formed at the outer end of the piston 14, and a secondary movable rod 16 is integrally formed at the outer end of the primary movable rod 15. The cross-section of the piston cavity 12 is a regular polygon, and the cross-sectional size of the piston 14 coincides with the cross-sectional size of the piston cavity 12. A supporting spring 17 is sleeved on the primary movable rod 15 and the secondary movable rod 16. A limiting member 18 is screwed and installed in the threaded groove at the end of the piston cavity 12. The cross-sectional size of the secondary movable rod 16 is smaller than the cross-sectional size of the primary movable rod 15, and the primary movable rod 15 movably passes through the center hole 45 on the limiting member 18. The arrangement of the primary movable rod 15 and the secondary movable rod 16 can prevent the support spring 17 from being damaged due to excessive displacement of the piston 14.

[0046] The outer end surface of the secondary movable rod 16 is integrally formed with a docking seat 32, a threaded hole is provided on the docking seat 32, the cross section of the docking seat 32 is a regular polygon, and a primary scraper seat 20 is fixedly installed on the docking seat 32 by a positioning bolt 19, a scraper assembly 21 is installed on the primary scraper seat 20, a docking groove is provided on the inner side surface of the primary scraper seat 20, and the docking seat 32 is embedded and installed in the docking groove, and a raw material precision mixing device for silicone rubber preparation composed of a mixing tank 1, a lifting module 2, a mounting beam 3, a stirring shaft 4 and a stirring rod 5 is provided, and A main air channel 10 is provided on the stirring shaft 4, and a secondary air hole 13 and a piston cavity 12 are provided on the stirring rod 5, and a piston 14, a primary movable rod 15, a secondary movable rod 16, and a supporting spring 17 are arranged in the piston cavity 12, so that the piston 14 is moved outward by inflating air into the main air channel 10, so that the device can push the scraper assembly 21 on the primary scraper seat 20 to move outward during self-cleaning, thereby forming an auxiliary cleaning effect on the inner wall of the mixing tank 1 through the scraper assembly 21, thereby preventing residual materials from contaminating subsequent raw materials.

[0047] Embodiment 2

[0048] See also Figure 9-12 On the basis of the first embodiment, a primary movable groove 22 is provided on the outer end surface of the docking seat 32, and the scraper assembly 21 is composed of a primary scraper plate 24 and a primary scraper mouth 25. The primary scraper plate 24 is movably arranged in the primary movable groove 22, and the inner end surface of the primary scraper plate 24 is connected to the bottom of the primary movable groove 22 through an elastic support member 23. After the piston chamber 12 is inflated, the primary movable rod 15 moves to abut against the limit member 18, and at this time, the primary scraper mouth 25 abuts against the inner wall of the mixing tank 1, and at this time, the elastic support member 23 is in a compressed state. Through the elastic support effect of the elastic support member 23, the primary scraper mouth 25 can be ensured to be in stable contact with the inner wall of the mixing tank 1, and excessive force between the primary scraper mouth 25 and the inner wall of the mixing tank 1 can also be avoided.

[0049] The inner side of the primary scraper seat 20 is integrally formed with a connecting rod 28, and a collar 29 is integrally formed on the connecting rod 28. The collar 29 is movably sleeved on the stirring rod 5, and the collar 29 is arranged in pairs. The upper and lower sides of the collar 29 are connected to stirring blades 31 through connecting columns 30. The stirring rod 5 is arranged in multiple layers at equal intervals, and each layer is arranged with three equal circumferences. The primary scraper seats 20 on the stirring rods 5 of adjacent layers are arranged close to each other, and a gap is left between the lowest primary scraper seat 20 and the bottom surface of the inner cavity of the mixing tank 1, through During the mixing process, the air supply device is started to inflate, and the pressure is released through the pressure relief valve, so that the air supply device and the pressure relief valve are operated alternately, thereby driving the stirring blade 31 to reciprocate in the horizontal direction, and at the same time, through the lifting and reciprocating motion of the lifting module 2, the stirring blade 31 can realize reciprocating motion in the up and down directions, so that the stirring blade 31 can move simultaneously in multiple dimensions during the mixing process, thereby improving the mixing effect of the raw materials, thereby achieving the purpose of improving product quality, and can improve the mixing efficiency of the raw materials and improve production efficiency.

[0050] Embodiment 3

[0051] See also Figure 13-14 On the basis of the second embodiment, the bottom of the stirring shaft 4 is integrally formed with a secondary scraper seat 33, and a secondary movable groove 34 is provided on the secondary scraper seat 33. The cross section of the secondary movable groove 34 is an inverted convex shape, and a T-shaped scraper 36 is movably provided in the secondary movable groove 34. A supporting airbag 35 is provided between the top surface of the T-shaped scraper 36 and the secondary movable groove 34. A tertiary air hole 46 is provided on the side wall of the bottom of the stirring shaft 4. The tertiary air hole 46 is connected to the inner cavity of the supporting airbag 35 through a connecting pipe 47. The T-shaped scraper The horizontal plate of 36 is connected to the bottom side wall of the secondary movable groove 34 through a reset spring 38. The bottom surface of the vertical plate of the T-shaped scraper 36 is provided with a secondary scraper opening 37. When the support airbag 35 is not inflated, the reset spring 38 is in a reset state, and at this time, the secondary scraper opening 37 is not in contact with the bottom surface of the inner cavity of the mixing tank 1. After the support airbag 35 is inflated, the secondary scraper opening 37 is in contact with the bottom surface of the inner cavity of the mixing tank 1, forming a self-cleaning effect on the bottom surface of the inner cavity of the mixing tank 1, thereby further improving the self-cleaning effect of the device.

[0052] The primary scraper opening 25 and the secondary scraper opening 37 are both hard silicone strips. The ends of the secondary movable grooves 34 are fixed by screws to the sealing seats 39. The side walls of the primary scraper plate 24 and the T-shaped scraper 36 are covered with rubber sealing layers 40 to improve the sealing performance of the contact positions between the primary scraper plate 24 and the T-shaped scraper 36 and other components.

[0053] A precise mixing production process for raw materials for preparing silicone rubber, the precise mixing production process for raw materials for preparing silicone rubber is operated by the precise mixing equipment for raw materials for preparing silicone rubber, and the precise mixing production process for raw materials for preparing silicone rubber includes:

[0054] The feeding process is performed by adding raw materials into the mixing tank 1;

[0055] In the mixing process, the stirring shaft 4 is driven by the driving motor 8 to stir and mix the raw materials. In the mixing process, the air supply device is started to inflate and the pressure is released by the pressure relief valve. The stirring blade 31 is driven to reciprocate in the horizontal direction through the alternating operation of the two. At the same time, the lifting and reciprocating movement of the lifting module 2 allows the stirring blade 31 to move in the up and down directions. In the mixing process, the stirring blade 31 moves simultaneously in multiple dimensions, thereby improving the mixing effect of the raw materials.

[0056] The self-cleaning process is carried out by injecting clean water into the mixing tank 1 and starting the air supply device and the drive motor 8, so that the first-level scraper mouth 25 and the second-level scraper mouth 37 are respectively against the inner cavity side wall and the inner cavity bottom surface of the mixing tank 1, thereby avoiding the presence of residual materials on the side wall of the mixing tank 1, and the multi-dimensional movement of the stirring blade 31 can also effectively improve the self-cleaning effect of the stirring blade 31.

[0057] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A precise mixing equipment for raw materials used in the preparation of silicone rubber, characterized in that: The raw material precision mixing equipment for preparing silicone rubber includes: A mixing tank (1), wherein the mixing tank (1) is mounted on a device base via legs (6); A lifting module (2), wherein the lifting module (2) is mounted on a base; A mounting beam (3), wherein the mounting beam (3) is fixedly connected to the telescopic mechanism of the lifting module (2); A stirring shaft (4), wherein the stirring shaft (4) is rotatably mounted on the mounting beam (3), and the lower end of the stirring shaft (4) extends into the inner cavity of the mixing tank (1); a driving motor (8) is fixedly mounted on the mounting beam (3), a transmission gear (9) is fixedly mounted on the output shaft of the driving motor (8), and a driven gear (7) is fixedly mounted on the stirring shaft (4), and the driven gear (7) is meshed with the transmission gear (9); A stirring rod (5), wherein the stirring rod (5) is fixedly mounted on the stirring shaft (4); The stirring shaft (4) is provided with a main air passage (10), and a sealing bearing groove (44) is provided at an upper port of the main air passage (10). A sealing bearing (41) is fixedly installed in the sealing bearing groove (44), and an air delivery pipe (42) is fixedly installed in the inner ring of the bearing of the sealing bearing (41). The air delivery pipe (42) is a hard steel pipe, and the air delivery pipe (42) is positioned on the mounting beam (3) through a pipe bracket (43). The end of the air delivery pipe (42) is connected to the air supply port of the air supply device through an air delivery hose, and a pressure relief valve is provided on the air delivery pipe (42). A primary air hole (11) is provided on the side wall of the main air passage (10), and a secondary air hole (13) and a piston cavity (12) are provided on the stirring rod (5). A threaded groove is provided at the port position of the piston cavity (12); The primary air hole (11) and the secondary air hole (13) are arranged in alignment, and the piston chamber (12) is connected to the main air channel (10) through the primary air hole (11) and the secondary air hole (13). A piston (14) is movably installed in the piston chamber (12). A primary movable rod (15) is integrally formed at the outer end of the piston (14), and a secondary movable rod (16) is integrally formed at the outer end of the primary movable rod (15). The cross section of the piston chamber (12) is a regular polygon. The cross-sectional dimensions of the piston (14) match the cross-sectional dimensions of the piston chamber (12). Support springs (17) are sleeved on the primary movable rod (15) and the secondary movable rod (16). A limiting member (18) is screwed and installed in the threaded groove at the end of the piston chamber (12). The cross-sectional dimensions of the secondary movable rod (16) are smaller than those of the primary movable rod (15), and the primary movable rod (15) movably passes through the center hole (45) on the limiting member (18).

2. The precise raw material mixing equipment for preparing silicone rubber according to claim 1, characterized in that: The outer end surface of the secondary movable rod (16) is integrally formed with a docking seat (32), a threaded hole is provided on the docking seat (32), the cross section of the docking seat (32) is a regular polygon, and a primary scraper seat (20) is fixedly mounted on the docking seat (32) via a positioning bolt (19), a scraper assembly (21) is mounted on the primary scraper seat (20), and a docking groove is provided on the inner side surface of the primary scraper seat (20), and the docking seat (32) is embedded and installed in the docking groove.

3. The precise raw material mixing equipment for preparing silicone rubber according to claim 2, characterized in that: The outer end surface of the docking seat (32) is provided with a primary movable groove (22), and the scraper assembly (21) is composed of a primary scraper plate (24) and a primary scraper mouth (25). The primary scraper plate (24) is movably arranged in the primary movable groove (22), and the inner end surface of the primary scraper plate (24) is connected to the bottom of the primary movable groove (22) through an elastic support member (23). After the piston chamber (12) is inflated, the primary movable rod (15) moves to abut against the limit member (18), and at this time, the primary scraper mouth (25) abuts against the inner wall of the mixing tank (1), and at this time, the elastic support member (23) is in a compressed state.

4. The precise raw material mixing equipment for preparing silicone rubber according to claim 3, characterized in that: A connecting rod (28) is integrally formed on the inner side surface of the primary scraper seat (20), and a sleeve (29) is integrally formed on the connecting rod (28). The sleeve (29) is movably sleeved on the stirring rod (5), and the sleeves (29) are arranged in pairs. The upper and lower sides of the sleeve (29) are connected to stirring blades (31) via connecting columns (30).

5. The precise raw material mixing equipment for preparing silicone rubber according to claim 4, characterized in that: The stirring rods (5) are arranged in multiple layers at equal intervals, and three stirring rods are arranged in each layer at equal circumferences. The first-level scraper seats (20) on adjacent layers of stirring rods (5) are arranged close to each other, and a gap is left between the lowest first-level scraper seat (20) and the bottom surface of the inner cavity of the mixing tank (1).

6. The precise raw material mixing equipment for preparing silicone rubber according to claim 5, characterized in that: The bottom of the stirring shaft (4) is integrally formed with a secondary scraper seat (33), the secondary scraper seat (33) is provided with a secondary movable groove (34), the cross section of the secondary movable groove (34) is in the shape of an inverted convex character, and a T-shaped scraper (36) is movably arranged in the secondary movable groove (34), a supporting airbag (35) is arranged between the top surface of the T-shaped scraper (36) and the secondary movable groove (34), and a tertiary air hole (46) is provided on the side wall of the bottom of the stirring shaft (4), and the tertiary air hole (46) is connected to the supporting airbag (35) through a connecting pipe (47). 5), the transverse plate of the T-shaped scraper (36) is connected to the bottom side wall of the secondary movable groove (34) through a reset spring (38), the bottom surface of the vertical plate of the T-shaped scraper (36) is provided with a secondary scraper opening (37), when the support airbag (35) is not inflated, the reset spring (38) is in a reset state, and at this time, the secondary scraper opening (37) is not in contact with the bottom surface of the inner cavity of the mixing tank (1), and after the support airbag (35) is inflated, the secondary scraper opening (37) is in contact with the bottom surface of the inner cavity of the mixing tank (1).

7. The precise raw material mixing equipment for preparing silicone rubber according to claim 6, characterized in that: The primary scraper opening (25) and the secondary scraper opening (37) are both hard silicone strips, the ends of the secondary movable groove (34) are fixed to a sealing seat (39) by screws, and the side walls of the primary scraper plate (24) and the T-shaped scraper (36) are both covered with a rubber sealing layer (40).

8. A precise mixing production process for raw materials for preparing silicone rubber, characterized by: The precise mixing production process for raw materials for preparing silicone rubber is operated by any one of the precise mixing equipment for raw materials for preparing silicone rubber according to claims 1 to 7, and the precise mixing production process for raw materials for preparing silicone rubber comprises: The loading process is carried out by adding raw materials into the mixing tank (1); During the mixing process, the driving motor (8) drives the stirring shaft (4) to stir and mix the raw materials. During the mixing process, the air supply device is started to inflate the gas, and the pressure is released through the pressure relief valve. The two are operated alternately to drive the stirring blade (31) to reciprocate in the horizontal direction. At the same time, the lifting and reciprocating movement of the lifting module (2) causes the stirring blade (31) to move in the up and down directions. During the mixing process, the stirring blade (31) moves simultaneously in multiple dimensions, thereby improving the mixing effect of the raw materials. In the self-cleaning process, clean water is injected into the mixing tank (1), and the air supply device and the drive motor (8) are started, so that the first-level scraper mouth (25) and the second-level scraper mouth (37) are respectively pressed against the inner cavity side wall and the inner cavity bottom surface of the mixing tank (1), thereby avoiding the presence of residual materials on the side wall of the mixing tank (1), and the multi-dimensional movement of the stirring blade (31) can also effectively improve the self-cleaning effect of the stirring blade (31).

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