A new type of feeding and pressing device for an internal mixer

Abstract

The application discloses a new type feeding and pressing device of an internal mixer, and relates to the technical field of the internal mixer.The feeding cylinder is provided with a transition plate on the top, and upper jackscrews are arranged on the two sides of the feeding cylinder;the horizontal beam is connected with the telescopic ends of the two upper jackscrew cylinders;the bottom of the piston rod is connected with the upper jackscrew, the upper jackscrew is connected with the hose, the outer side of the hose is sleeved with the sheath, the sheath and the upper end of the piston rod are slid through the transition plate, the first sealing assembly is arranged between the sheath and the transition plate, and the top end of the piston rod is connected with the horizontal beam;the top of the transition plate is fixed with the buffer assembly.The buffer assembly can be used for buffering when the position of the horizontal beam falls to the lowest point, so that the impact sound is avoided, the device is prevented from being damaged, the sealing assembly and the connecting assembly are arranged, the material leakage and the device abrasion are reduced, and the environmental pollution is reduced.

Description

Technical Field

[0001] This invention relates to the field of internal mixer technology, and specifically to a novel internal mixer feeding and pressing device. Background Technology

[0002] Internal mixers are commonly used mixing equipment in the production of rubber, plastics, and chemical products to uniformly mix various raw materials. The feeding and pressing device is a key component of the internal mixer, which, through the coordinated work of mechanical structures, realizes the conveying, pressurizing, and sealing of materials. Its performance directly affects the mixing efficiency and quality of the rubber compound.

[0003] Traditional internal mixer feeding and pressing devices typically employ simple mechanical structures, lacking effective buffering and sealing designs. This makes them prone to leakage and wear under high-pressure operating conditions, consequently affecting mixing quality and equipment lifespan. Furthermore, traditional devices often use rigid connections for connecting components, lacking flexibility and stability, making them susceptible to loosening and damage during long-term operation. Summary of the Invention

[0004] The purpose of this invention is to provide a novel feeding and pressing device for an internal mixer to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a novel internal mixer feeding and pressing device, comprising:

[0006] A feeding cylinder, the top of which is connected to a transition plate, and both sides of which are connected to upper top bolt cylinders, the cylinder body of which is fixedly inserted through the transition plate;

[0007] A crossbeam is located above the transition plate. The crossbeam is connected to the telescopic ends of the two upper top bolt cylinders. A first connecting assembly is provided between the telescopic ends of the upper top bolt cylinders and the crossbeam.

[0008] A piston rod is nested inside a feeding cylinder. A top bolt is connected to the bottom of the piston rod. A second connecting assembly is provided between the top bolt and the piston rod. A flexible hose is connected to the top bolt, and a protective sleeve is fitted over the outer side of the flexible hose. Both the protective sleeve and the upper end of the piston rod slide through a transition plate. A first sealing assembly is provided between the protective sleeve and the transition plate, and a second sealing assembly is provided between the piston rod and the transition plate. The top end of the piston rod is connected to a crossbeam, and a limit switch for the top bolt is installed on the protective sleeve.

[0009] A buffer assembly is fixed to the top of the transition plate, and the buffer assembly is sleeved on the outside of the piston rod.

[0010] Furthermore, the first connecting assembly includes a first flange, a first copper sleeve, and a second transition joint. The first flange and the second transition joint are sequentially installed at the end of the telescopic end of the upper top bolt cylinder. The first copper sleeve is installed between the first flange and the second transition joint. The first flange is connected to the crossbeam. The end of the second transition joint adopts an arc structure. The outer circle of the second transition joint adopts an approximately elliptical shape so that the swing of the crossbeam during movement will not damage the upper top bolt cylinder. It can also concentrate the force on the outside of the cylinder rod. The contact point between the second transition joint and the crossbeam is filled with grease.

[0011] The design of the first connecting component ensures the stability of the connection between the crossbeam and the upper jack cylinder, preventing loosening under high pressure. Lubricating grease is injected at the contact point between the second transition joint and the crossbeam to reduce friction and extend service life.

[0012] Furthermore, cylinder supports are installed on both sides of the feeding cylinder at the bottom of the cylinder body of the upper jack cylinder. The cylinder supports are connected to the bottom of the cylinder body of the upper jack cylinder to provide stable support for the cylinder body of the upper jack cylinder and prevent deformation and damage under high pressure.

[0013] Furthermore, the top plug is a water-passing structure, with an inlet and an outlet on the left and right sides of the top plug, respectively, and a first transition joint connecting the inlet of the top plug to the hose.

[0014] The first sealing assembly includes a packing seat, a first O-ring between the lower end of the packing seat and the sheath, a second O-ring between the lower outer part of the packing seat and the transition plate, a pressure ring between the upper end of the packing seat and the sheath, a first packing gland on the outer side of the upper end of the packing seat, and a packing gland nested at the end of the packing seat.

[0015] The first transition joint connects to the hose, allowing cold water to enter and hot water to exit, thus cooling the hose and preventing deformation and damage at high temperatures. The hose also acts as a buffer to prevent water leakage during movement. The sheath is fitted over the outside of the hose to protect it and to assist in positioning the top bolt during movement. The first sealing assembly ensures the sealing performance between the sheath and the transition plate, preventing material leakage.

[0016] Furthermore, the second connecting assembly includes a second flange, the lower end of the piston rod is connected to the upper bolt through the second flange, a cover plate is provided above the second flange, an oil seal is provided between the cover plate and the piston rod, an upper baffle is provided above the cover plate, and the upper part of the upper baffle is designed with a slope to avoid dust accumulation;

[0017] The second connecting component ensures the stability of the connection between the piston rod and the upper bolt, preventing loosening under high pressure. The oil seal design ensures the sealing performance between the cover plate and the piston rod, preventing grease leakage and contamination of the adhesive.

[0018] Furthermore, the lower end of the piston rod adopts a conical structure, which is easy to process and distributes force evenly, increasing the contact area during swinging. The connection cavity between the piston rod and the upper plug is filled with grease, which reduces friction and extends service life.

[0019] Furthermore, the upper end of the piston rod is threaded with a nut through the crossbeam, and the piston rod body inside the crossbeam is fitted with a third copper sleeve, which reduces friction and extends service life.

[0020] Furthermore, the second sealing assembly includes a copper pressure sleeve and a second copper sleeve. The copper pressure sleeve is located below the second copper sleeve. A second packing is provided between the second copper sleeve and the copper pressure sleeve. Lubricating grease is injected at the contact point between the second copper sleeve and the piston rod to reduce friction and reduce wear on the piston rod. Through the design of the second sealing assembly, the sealing performance between the piston rod and the transition plate is ensured, preventing material leakage and avoiding grease from entering the adhesive.

[0021] Furthermore, the feeding cylinder includes a rear wall plate, a lower front wall, a left wall plate, an upper front wall, and a right wall plate. The rear wall plate, the lower front wall, the left wall plate, the upper front wall, and the right wall plate are fixed by welding. Each component of the feeding cylinder is made of steel plate, which ensures the structural strength of the device and prevents deformation and damage under high pressure.

[0022] A feeding door is installed at the top of the lower part of the front wall, and an exhaust port is opened on the upper part of the front wall. An exhaust hood is installed on the upper part of the front wall corresponding to the exhaust port. The exhaust hood is connected to a dust removal hood, and the dust removal hood is connected to an external ventilation system. The exhaust hood and the dust removal hood work together to remove smoke and dust from inside the internal mixer, resulting in good dust removal effect.

[0023] The feeding door and the upper part of the front wall adopt a beveled sealing structure to ensure the sealing performance between the feeding door and the upper part of the front wall and prevent material leakage.

[0024] The upper top bolt is slidably nested inside the feeding cylinder. The contact surface between the upper top bolt and the feeding cylinder is spray-welded with a 1mm thick wear-resistant alloy. The four corners of the upper top bolt are overlaid with stainless steel layers, making the whole structure more wear-resistant and extending its service life.

[0025] Furthermore, the buffer assembly includes a spring seat, a butterfly spring, a retaining ring, a shaft retaining ring, a sleeve, and a nylon buffer pad. The number of butterfly springs is set to multiple, and multiple butterfly springs are mounted on the spring seat. The upper end of the spring seat is equipped with a retaining ring and a shaft retaining ring. The nylon buffer pad is located on the upper side of the retaining ring, and the nylon buffer pad is fixed to the transition plate by the sleeve.

[0026] The buffer assembly is designed to cushion the impact when the crossbeam reaches its lowest point, preventing loud impact noise and damage to the equipment. The buffer assembly absorbs pressure and impact through a disc spring and a nylon cushioning pad, resulting in a longer service life and better performance.

[0027] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0028] 1. The top plug is a water-passing structure. The top plug has an inlet and an outlet on its left and right sides, respectively. The inlet of the top plug is connected to the hose through the first transition joint to allow cold water to enter and hot water to exit, thus cooling the plug and preventing deformation and damage at high temperatures. The hose also acts as a buffer to prevent water leakage during movement. The sheath is fitted on the outside of the hose to protect it and to assist in positioning the top plug during movement. The first sealing component ensures the sealing performance between the sheath and the transition plate to prevent material leakage.

[0029] 2. The telescopic end of the upper jack cylinder is connected to the crossbeam through the first connecting assembly. The first copper sleeve in the first connecting assembly is used to absorb the impact during movement. The end of the second transition joint in the first connecting assembly adopts an arc structure. The outer circle of the second transition joint adopts an approximately elliptical shape so that the swing of the crossbeam during movement will not damage the upper jack cylinder. It can also concentrate the force on the outside of the cylinder rod to avoid the second transition joint and the upper jack cylinder from breaking and being damaged.

[0030] 3. The piston rod and the upper plug are connected by a second connecting assembly, which is simple and convenient and avoids the risk of piston rod breakage. The piston rod head adopts a conical structure, which is easy to process and distributes the force evenly, increasing the contact area during swinging. The cavity where it connects with the upper plug is filled with grease to reduce damage to the piston rod. The top is sealed with an oil seal to prevent leakage and contamination of the rubber material.

[0031] 4. All components of the feeding cylinder are made of steel plates, and the wall panels are fixed by welding to ensure the structural strength of the device and prevent deformation and damage under high pressure. The contact surface between the feeding cylinder and the top bolt is sprayed with a 1mm thick wear-resistant alloy, and the four corners of the top bolt are overlaid with stainless steel, making the whole device more wear-resistant and extending its service life.

[0032] 5. The feeding cylinder is equipped with an exhaust hood, which is connected to a dust collector hood. The dust collector hood is connected to an external ventilation system. The exhaust hood and the dust collector hood work together to remove smoke and dust from inside the internal mixer, resulting in good dust removal effect.

[0033] 6. At the sliding joint between the piston rod and the transition plate, the second copper sleeve is used for lubrication to reduce piston rod wear. In addition, the lower copper pressure sleeve and the second packing provide further sealing to prevent grease from entering the rubber material and to prevent internal dust from leaking out at this point.

[0034] 7. The piston rod and the crossbeam are connected and fixed by nuts. A third copper sleeve is added in the middle to buffer the impact and facilitate subsequent disassembly, preventing the piston rod from jamming directly with the crossbeam.

[0035] 8. A buffer assembly is fixed to the top of the transition plate, which can buffer when the crossbeam is at its lowest position, avoiding loud impact noise and damage to the equipment. The buffer assembly absorbs pressure and impact through a disc spring and a nylon buffer pad, resulting in a longer service life and better performance. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0037] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 This is a side sectional view of the present invention;

[0039] Figure 3 For the present invention Figure 1 Enlarged view of part A;

[0040] Figure 4 For the present invention Figure 1 Enlarged view of part B;

[0041] Figure 5 For the present invention Figure 2 Enlarged view of part C;

[0042] Figure 6 For the present invention Figure 2 Enlarged view of part D;

[0043] Figure 7 This is a cross-sectional view of the feeding cylinder of the present invention;

[0044] Figure 8 This is a top view of the feeding cylinder of the present invention.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. Top bolt; 2. First transition joint; 3. Hoses; 4. Sheath; 5. Packing seat; 6. First O-ring; 7. Second O-ring; 8. Pressure ring; 9. First packing; 10. Packing gland; 11. Top bolt cylinder; 12. First flange; 13. First copper sleeve; 14. Second transition joint; 15. Second flange; 16. Cover plate; 17. Oil seal; 18. Upper baffle; 19. Piston rod; 20. Feed cylinder; 21. Transition plate; 22. Copper pressure sleeve; 23. 24. Second copper sleeve; 25. Buffer assembly; 26. Crossbeam; 27. Third copper sleeve; 28. Nut; 29. ​​Feeding door; 30. Exhaust hood; 31. Dust hood; 32. Top bolt limit switch; 33. Cylinder support; 34. Rear wall panel; 35. Lower part of front wall; 36. Left wall panel; 37. Upper part of front wall; 38. Right wall panel; 39. Spring seat; 40. Butterfly spring; 41. Snap ring; 42. Shaft retaining ring; 43. Sleeve; 44. Nylon buffer pad. Detailed Implementation

[0047] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0048] This invention provides a novel feeding and pressing device for an internal mixer, such as... Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, it includes:

[0049] The feeding cylinder 20 has a transition plate 21 connected to its top, and upper top bolt cylinders 11 are connected to both sides of the feeding cylinder 20. The cylinder body of the upper top bolt cylinder 11 is fixed through the transition plate 21.

[0050] The crossbeam 26 is located above the transition plate 21 and is connected to the telescopic ends of the two upper top bolt cylinders 11.

[0051] Piston rod 19 is nested inside feed cylinder 20. The bottom of piston rod 19 is connected to upper top bolt 1. A second connecting assembly is provided between upper top bolt 1 and piston rod 19. A hose 3 is connected to upper top bolt 1. A sheath 4 is sleeved on the outside of hose 3. The sheath 4 and the upper end of piston rod 19 both slide through transition plate 21. A first sealing assembly is provided between sheath 4 and transition plate 21. A second sealing assembly is provided between piston rod 19 and transition plate 21. The top of piston rod 19 is connected to crossbeam 26. Upper top bolt limit switch 32 is installed on sheath 4.

[0052] The top plug 1 is a water-passing structure. The left and right sides of the top plug 1 are respectively provided with water inlet and water outlet. The water inlet of the top plug 1 is connected to the hose 3 by a first transition joint 2.

[0053] The first sealing assembly includes a packing seat 5, a first O-ring 6 between the lower end of the packing seat 5 and the sheath 4, a second O-ring 7 between the lower outer part of the packing seat 5 and the transition plate 21, a pressure ring 8 between the upper end of the packing seat 5 and the sheath 4, a first packing 9 on the outer side of the upper end of the packing seat 5, and a packing gland 10 nested at the end of the packing seat 5.

[0054] The first transition joint 2 is connected to the hose 3 to allow cold water to enter and hot water to exit, thus cooling the hose and preventing deformation and damage at high temperatures. The hose 3 also acts as a buffer to prevent water leakage during movement. The sheath 4 is fitted onto the outside of the hose 3 to protect it and to assist in positioning the top bolt 1 during movement. The first sealing assembly ensures the sealing performance between the sheath 4 and the transition plate 21 to prevent material leakage.

[0055] The second connecting assembly includes a second flange 15. The lower end of the piston rod 19 is connected to the upper bolt 1 through the second flange 15. A cover plate 16 is provided above the second flange 15. An oil seal 17 is provided between the cover plate 16 and the piston rod 19. An upper baffle 18 is provided above the cover plate 16. The upper part of the upper baffle 18 is designed with a slope to avoid dust accumulation.

[0056] The second connecting component ensures the stability of the connection between the piston rod 19 and the upper bolt 1, preventing loosening under high pressure. The design of the oil seal 17 ensures the sealing performance between the cover plate 16 and the piston rod 19, preventing grease leakage and contamination of the adhesive.

[0057] The lower end of the piston rod 19 has a conical head, which is easy to process and distributes force evenly, increasing the contact area during swinging. The connection cavity between the piston rod 19 and the upper plug 1 is filled with grease, which reduces friction and extends service life.

[0058] The upper end of the piston rod 19 is threaded through the crossbeam 26 and fitted with a nut 28. The piston rod 19, which is inside the crossbeam 26, is fitted with a third copper sleeve 27, which reduces friction and extends service life.

[0059] The second sealing assembly includes a copper pressure sleeve 22 and a second copper sleeve 24. The copper pressure sleeve 22 is located below the second copper sleeve 24. A second packing 23 is provided between the second copper sleeve 24 and the copper pressure sleeve 22. The contact area between the second copper sleeve 24 and the piston rod 19 is filled with grease to reduce friction and reduce wear on the piston rod 19. Through the design of the second sealing assembly, the sealing performance between the piston rod 19 and the transition plate 21 is ensured, preventing material leakage and avoiding grease from entering the adhesive.

[0060] like Figure 1 and Figure 3As shown, a first connecting assembly is provided between the telescopic end of the upper jack cylinder 11 and the crossbeam 26. The first connecting assembly includes a first flange 12, a first copper sleeve 13, and a second transition joint 14. The first flange 12 and the second transition joint 14 are sequentially installed at the ends of the telescopic end of the upper jack cylinder 11. The first copper sleeve 13 is installed between the first flange 12 and the second transition joint 14. The first flange 12 is connected to the crossbeam 26. The end of the second transition joint 14 adopts an arc structure. The outer circle of the second transition joint 14 adopts an approximately elliptical shape. Lubricating grease is injected at the contact point between the second transition joint 14 and the crossbeam 26.

[0061] On both sides of the feeding cylinder 20, corresponding to the bottom of the cylinder body of the upper top bolt cylinder 11, cylinder supports 33 are installed, and the cylinder supports 33 are connected to the bottom of the cylinder body of the upper top bolt cylinder 11.

[0062] The cylinder support 33 provides stable support for the upper jack cylinder 11, preventing deformation and damage under high pressure. The design of the first connecting component ensures the connection stability between the crossbeam 26 and the upper jack cylinder 11, preventing loosening under high pressure. Lubricating grease is injected at the contact point between the second transition joint 14 and the crossbeam 26 to reduce friction and extend service life. The end of the second transition joint 14 adopts an arc structure, and the outer circle of the second transition joint 14 adopts an approximately elliptical shape to ensure that the swing of the crossbeam 26 during movement will not damage the upper jack cylinder 11, and the force concentration point is also on the outside of the cylinder rod.

[0063] like Figure 2 , Figure 7 and Figure 8 As shown, the feeding cylinder 20 includes a rear wall plate 34, a lower front wall 35, a left wall plate 36, an upper front wall 37, and a right wall plate 38. The rear wall plate 34, the lower front wall 35, the left wall plate 36, the upper front wall 37, and the right wall plate 38 are fixed by welding. All components of the feeding cylinder 20 are made of steel plates, which ensures the structural strength of the device and prevents deformation and damage under high pressure.

[0064] A feeding door 29 is installed at the top of the lower part 35 of the front wall. The feeding door 29 and the upper part 37 of the front wall adopt a beveled sealing structure to ensure the sealing performance between the feeding door 29 and the upper part 37 of the front wall and prevent material leakage.

[0065] The upper top bolt 1 is slidably nested inside the feeding cylinder 20. The contact surface between the upper top bolt 1 and the feeding cylinder 20 is sprayed with a 1mm thick wear-resistant alloy. The four corners of the upper top bolt 1 are overlaid with stainless steel layers, making the whole more wear-resistant and extending its service life.

[0066] like Figure 2As shown, an exhaust port is provided on the upper part 37 of the front wall, and an exhaust hood 30 is installed on the upper part 37 of the front wall corresponding to the exhaust port. The exhaust hood 30 is connected to a dust removal hood 31, and the dust removal hood 31 is connected to an external ventilation system. The exhaust hood 30 and the dust removal hood 31 work together to remove smoke and dust from inside the internal mixer, resulting in a good dust removal effect.

[0067] like Figure 2 and Figure 5 As shown, a buffer assembly 25 is fixed to the top of the transition plate 21. The buffer assembly 25 is sleeved on the outside of the piston rod 19. The buffer assembly 25 includes a spring seat 39, a butterfly spring 40, a retaining ring 41, a shaft retaining ring 42, a sleeve 43, and a nylon buffer pad 44. Multiple butterfly springs 40 are provided and are installed on the spring seat 39. The upper end of the spring seat 39 is equipped with a retaining ring 41 and a shaft retaining ring 42. The nylon buffer pad 44 is located on the upper side of the retaining ring 41 and is fixed to the transition plate 21 by the sleeve 43.

[0068] The buffer assembly 25 is designed to cushion the impact when the crossbeam 26 is at its lowest position, preventing loud impact noise and damage to the equipment. The buffer assembly 25 absorbs pressure and impact through the disc spring 40 and the nylon buffer pad 44, resulting in a longer service life and better performance.

[0069] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A novel feeding and pressing device for an internal mixer, characterized in that, include: Feeding cylinder (20), the top of the feeding cylinder (20) is connected to a transition plate (21), and both sides of the feeding cylinder (20) are connected to an upper top bolt cylinder (11), the cylinder body of the upper top bolt cylinder (11) is fixed through the transition plate (21). A crossbeam (26) is located above the transition plate (21). The crossbeam (26) is connected to the telescopic ends of the two upper top bolt cylinders (11). A first connecting assembly is provided between the telescopic ends of the upper top bolt cylinders (11) and the crossbeam (26). A piston rod (19) is nested inside a feeding cylinder (20). The bottom of the piston rod (19) is connected to an upper plug (1). A second connecting assembly is provided between the upper plug (1) and the piston rod (19). A hose (3) is connected to the upper plug (1). A sheath (4) is sleeved on the outside of the hose (3). The upper ends of the sheath (4) and the piston rod (19) slide through a transition plate (21). A first sealing assembly is provided between the sheath (4) and the transition plate (21). A second sealing assembly is provided between the piston rod (19) and the transition plate (21). The top of the piston rod (19) is connected to a crossbeam (26). An upper plug limit switch (32) is installed on the sheath (4). A buffer assembly (25) is fixed to the top of the transition plate (21), and the buffer assembly (25) is sleeved on the outside of the piston rod (19); The first connecting assembly includes a first flange (12), a first copper sleeve (13), and a second transition joint (14). The first flange (12) and the second transition joint (14) are sequentially installed at the ends of the telescopic end of the upper top bolt cylinder (11). The first copper sleeve (13) is installed between the first flange (12) and the second transition joint (14). The first flange (12) is connected to the crossbeam (26). The end of the second transition joint (14) adopts an arc structure. The outer circle of the second transition joint (14) adopts an approximately elliptical shape. The contact point between the second transition joint (14) and the crossbeam (26) is filled with grease. The second connecting assembly includes a second flange (15), the lower end of the piston rod (19) is connected to the upper bolt (1) through the second flange (15), a cover plate (16) is provided above the second flange (15), an oil seal (17) is provided between the cover plate (16) and the piston rod (19), an upper baffle (18) is provided above the cover plate (16), and the upper part of the upper baffle (18) adopts a sloping design.

2. The novel internal mixer feeding and pressing device according to claim 1, characterized in that: On both sides of the feeding cylinder (20), corresponding to the bottom of the cylinder body of the upper top bolt cylinder (11), cylinder supports (33) are installed, and the cylinder supports (33) are connected to the bottom of the cylinder body of the upper top bolt cylinder (11).

3. The novel internal mixer feeding and pressing device according to claim 1, characterized in that: The top plug (1) is a water-passing structure. The top plug (1) has an inlet and an outlet on its left and right sides, respectively. The inlet of the top plug (1) is connected to the hose (3) by a first transition joint (2). The first sealing assembly includes a packing seat (5), a first O-ring (6) is provided between the lower end of the packing seat (5) and the sheath (4), a second O-ring (7) is provided between the lower outer part of the packing seat (5) and the transition plate (21), a pressure ring (8) is provided between the upper end of the packing seat (5) and the sheath (4), a first packing (9) is provided on the outer side of the upper end of the packing seat (5), and a packing gland (10) is nested at the end of the packing seat (5).

4. The novel internal mixer feeding and pressing device according to claim 1, characterized in that: The lower end of the piston rod (19) has a conical structure, and the cavity connecting the piston rod (19) and the upper plug (1) is filled with grease.

5. A novel internal mixer feeding and pressing device according to claim 1, characterized in that: The upper end of the piston rod (19) is threaded through the crossbeam (26) and a nut (28) is connected to it. The piston rod (19) inside the crossbeam (26) is fitted with a third copper sleeve (27).

6. The novel internal mixer feeding and pressing device according to claim 1, characterized in that: The second sealing assembly includes a copper pressure sleeve (22) and a second copper sleeve (24). The copper pressure sleeve (22) is located below the second copper sleeve (24). A second packing (23) is provided between the second copper sleeve (24) and the copper pressure sleeve (22). Lubricating grease is injected at the contact point between the second copper sleeve (24) and the piston rod (19).

7. A novel internal mixer feeding and pressing device according to claim 1, characterized in that: The feeding cylinder (20) includes a rear wall panel (34), a lower front wall (35), a left wall panel (36), an upper front wall (37), and a right wall panel (38). The rear wall panel (34), the lower front wall (35), the left wall panel (36), the upper front wall (37), and the right wall panel (38) are fixed by welding. Each component of the feeding cylinder (20) is made of steel plate. A feeding door (29) is installed at the top of the lower front wall (35). An exhaust port is opened on the upper front wall (37). An exhaust hood (30) is installed on the upper front wall (37) at the position corresponding to the exhaust port. The exhaust hood (30) is connected to a dust removal hood (31). The dust removal hood (31) is connected to an external ventilation system. The feeding gate (29) and the upper part of the front wall (37) adopt a beveled sealing structure; The upper top bolt (1) is slidably nested inside the feeding cylinder (20). The contact surface between the feeding cylinder (20) and the upper top bolt (1) is sprayed with a 1mm thick wear-resistant alloy. The four corners of the upper top bolt (1) are overlaid with stainless steel layers.

8. A novel internal mixer feeding and pressing device according to claim 1, characterized in that: The buffer assembly (25) includes a spring seat (39), a butterfly spring (40), a retaining ring (41), a shaft retaining ring (42), a sleeve (43), and a nylon buffer pad (44). The number of butterfly springs (40) is multiple, and multiple butterfly springs (40) are mounted on the spring seat (39). The upper end of the spring seat (39) is equipped with a retaining ring (41) and a shaft retaining ring (42). The nylon buffer pad (44) is located on the upper side of the retaining ring (41), and the nylon buffer pad (44) is fixed to the transition plate (21) by the sleeve (43).

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