A rubber plasticizing machine

Abstract

The present invention discloses a rubber plasticizing machine, comprising a water tank and a tube body, wherein a rotatable main shaft is provided in the tube body; a feed port is provided on the side wall of one end of the tube body, and a discharge port is provided at the other end of the tube body; a feed auger, a discharge disc and a disc cutter are nested on the main shaft; the feed auger and the cutter disc rotate synchronously with the main shaft; a heating plate and a fixed knife block are fixed on the outer wall of the tube body, the heating plate is attached to the outer wall of the tube body, and the fixed guide block extends into the tube body through the outer wall of the tube body. The present invention improves the structure of the existing cold water rubber kneading machine, on the one hand, reducing the slippage phenomenon caused by cold operation, and on the other hand, using circulating cold to balance the hot operation temperature, avoiding the problem of excessive viscosity or even carbonization of the rubber, thereby obtaining better kneading and shearing effects, so that the obtained rubber has better Mooney viscosity and better processing performance.

Description

Technical Field

[0001] The invention relates to the technical field of recycled rubber devices, in particular to a rubber plasticizing machine. Background Art

[0002] In the recycled rubber production process, the raw materials are typically scrap tires that have been diced, crushed, and screened to a size of 28 mesh or larger, along with oil slurry (aromatic hydrogen oil) from the refinery. The rubber powder and aromatic hydrogen oil are mixed in a high-speed blender in appropriate proportions. After thorough mixing, the mixture is conveyed to a metering feed hopper, which then feeds the material into a sealed desulfurizer. The material then enters an inclined preheating cage, a reheating three-layer cage, and a main unit for heated rotary cutting to complete the high-temperature reaction. The material then enters a cooling discharge cage for cooling and discharge. The desulfurized material is conveyed by the cage to a plasticizer for low-temperature shearing (to knead the rubber), followed by a refiner for three refining steps, where it is wound into sheets, packaged, and stored.

[0003] Existing plasticizers are generally cold-operated, that is, they knead the rubber without heating it. Since the rubber may be mixed with a certain amount of water, a certain amount of water droplets will be generated on the cutter during cold operation, and the water will cause the rubber to slip when kneading, thereby affecting the kneading effect of the rubber. The present application uses a hot operation method to knead and shear the rubber to reduce this slippage phenomenon. However, due to the hot operation, the viscosity of the rubber will increase or even carbonize, making it easy to stick together. If the temperature is not well controlled, the performance of the rubber will be affected. Therefore, the present application optimizes the structure of the rubber kneading machine to achieve a certain balance between reducing slippage and hot operation, thereby improving the kneading and shearing effects of the rubber. Summary of the Invention

[0004] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a rubber plasticizing machine, which structurally improves the existing cold water kneading machine. On the one hand, it reduces the slippage caused by cold operation, and on the other hand, it uses circulating cold to balance the hot operation temperature to avoid the problem of excessive viscosity or even carbonization of the rubber, thereby obtaining better kneading and shearing effects, so that the obtained rubber has better Mooney viscosity and better processing performance.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides a rubber plasticizing machine, comprising a water tank and a tube body built into the water tank, wherein a rotatable main shaft is provided in the tube body, the main shaft being a hollow structure and provided with cooling circulating water; a feed port is provided on a side wall at one end of the tube body, and a discharge port is provided at the other end of the tube body;

[0007] A feed auger is nested at the position of the main shaft located at the feed port, and a discharge tray is nested at the position of the main shaft located at the discharge port. The discharge tray is fixed to the tube body and rotates relative to the main shaft. A plurality of evenly distributed disc cutters are also nested on the main shaft, and these disc cutters are located between the feed auger and the discharge tray. The feed auger and the cutter tray rotate synchronously with the main shaft.

[0008] A number of evenly distributed heating plates and fixed knife blocks are fixed on the outer wall of the tube body. These heating plates and fixed knife blocks are distributed in a linear array in the axial direction of the tube body and in a circular array in the circumferential direction of the tube body, and are arranged alternately in the circumferential direction of the tube body; the heating plates are attached to the outer wall of the tube body, and the fixed guide block extends through the outer wall of the tube body into the tube body.

[0009] Preferably, the main shaft is kept coaxial with the tube body through the left bracket at a position close to the feed port, and the main shaft is kept coaxial with the tube body through the right bracket at a position close to the discharge port. The left bracket and the right bracket are respectively fixed to the two ends of the tube body and are fixed to the water tank at the same time; the discharge tray is fixed to the right bracket.

[0010] Preferably, the disc cutter has a plurality of first blades uniformly distributed along the circumference, the first blades are provided with a wear-resistant layer, the fixed blade block has a second blade, the second blade extends into the tube body and the end of the second blade located in the tube body is wedge-shaped, the rotation direction of the first blade is toward the tip of the wedge; there is a gap between the disc cutter and the fixed blade block, and the gap is between 6mm and 7mm.

[0011] Preferably, the discharge disc is provided with a plurality of discharge holes evenly distributed along the circumference, and a cutting disc nested on the main shaft is provided on the side of the discharge disc away from the left bracket. The cutting disc rotates synchronously with the main shaft, and the cutting disc has a plurality of third blades evenly distributed along the circumference. The cutting disc is threadedly assembled on the main shaft through the second nut that is pressed against the shoulder of the main shaft. There is a gap between the cutting disc and the discharge disc, and the gap is 8 mm.

[0012] Preferably, a rotary joint is provided at one end of the main shaft away from the feed port, an inner water pipe is provided in the inner cavity of the main shaft, the inner water pipe is connected to the rotary joint, a water inlet pipe is provided at the bottom of the water tank, and a water outlet pipe is provided at the upper part of the water tank.

[0013] Preferably, a left support is fixed on the left bracket, and a right support is fixed on the right bracket. The left support and the right support are both rotatably connected to the main shaft. A sprocket is provided at one end of the main shaft close to the left support. A cover plate is nested on the right support. The cover plate is fixed on the right bracket, and a through groove is provided on the cover plate.

[0014] Preferably, a long plate is provided between the fixed knife block and the tube body, the long plate is fixed on the tube body, and both the long plate and the tube body are provided with fixed knife holes for the fixed knife block to pass through; the fixed knife block is fixed to the long plate by bolts, a sealing gasket is provided between the fixed knife block and the long plate, and a sealing groove for placing the sealing gasket is provided at the contact position between the fixed knife block and the long plate.

[0015] Preferably, a spacer sleeve is provided between the feed auger and the left bracket, between the feed auger and the disc cutter, and between two adjacent disc cutters. The spacer sleeve is nested on the main shaft. The spacer sleeve between the feed auger and the left bracket is pressed against the shoulder of the main shaft. The main shaft is threadedly assembled with a third nut at the discharge tray. The third nut is pressed against the disc cutter away from the feed auger.

[0016] The outer ring of the third nut is also provided with an external thread, the discharge tray is assembled with the external thread of the third nut, and the third nut is also provided with a plurality of evenly distributed threaded holes for adjusting the gap.

[0017] Preferably, bearings are provided in both the left support and the right support, the inner rings of the bearings are nested on the main shaft, and the outer rings of the bearings are embedded in the corresponding left support and the right support.

[0018] Preferably, the feed auger and the disc cutter are connected by keys and rotate synchronously with the main shaft. A key slot is provided on the main shaft, and a guide key is provided in the key slot. A middle support frame is also provided between the tube body and the water tank.

[0019] The beneficial effects of the present invention are:

[0020] (1) The present invention utilizes a heating plate to heat the tube body, so that the rubber is subjected to a hot operation during the kneading process. Compared with the existing cold operation, the generation of water droplets in the rubber is reduced, thereby reducing the slippage phenomenon generated during the kneading of the rubber. At the same time, the propulsion effect of the feed auger is utilized and the structure of the fixed blade block and the disc blade is optimized. Even if there are certain water droplets in the rubber, there will be no significant slippage phenomenon compared with the cold operation, thereby ultimately improving the kneading and shearing effect on the rubber.

[0021] (2) During the thermal operation of the rubber, in order to avoid excessive viscosity or even carbonization of the rubber due to excessive temperature, thereby forming adhesion, the present invention adopts circulating cooling water for cooling. In order to achieve the effect of rapid cooling, the present invention performs two-way cooling inside and outside the main shaft, thereby achieving cooling and increasing the cooling speed, thereby ensuring the kneading and shearing of the rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic structural diagram of a rubber plasticizing machine provided by an embodiment of the present invention (partial cross-section);

[0024] Figure 2 for Figure 1 Sectional view along the AA axis (partial section);

[0025] Figure 3 A schematic diagram of the water cycle;

[0026] Figure 4 Schematic diagram of the structure of the tube body;

[0027] Figure 5 is a cross-sectional view of the tube body;

[0028] Figure 6 Schematic diagram of the structure of the disc cutter;

[0029] Figure 7 for Figure 6 Cross-sectional view along the GG axis;

[0030] Figure 8 for Figure 6 Cross-sectional view in the mid-HH direction;

[0031] Figure 9 for Figure 1 Enlarged view of middle part B;

[0032] Figure 10 It is the structural diagram of the left support;

[0033] Figure 11 for Figure 1 Enlarged view of the middle C section;

[0034] Figure 12 for Figure 1 Enlarged view of the middle D part;

[0035] Figure 13 It is the structural diagram of the right support;

[0036] Figure 14 for Figure 1 Enlarged view of the middle E part;

[0037] Figure 15 Schematic diagram of the fixed blade block structure Figure 1 ;

[0038] Figure 16 Schematic diagram of the fixed blade block structure Figure 2 ;

[0039] Figure 17 for Figure 1 Enlarged view of the middle F part;

[0040] Figure 18 Schematic diagram of the discharge tray structure Figure 1 ;

[0041] Figure 19 Schematic diagram of the discharge tray structure Figure 2 ;

[0042] Figure 20 It is a structural diagram of the cutting knife disc.

[0043] Explanation of reference numerals: 1-water tank, 11-water inlet pipe, 12-water outlet pipe, 2-tube body, 21-feeding port, 22-long plate, 23-fixed knife hole, 3-left bracket, 4-right bracket, 41-cover plate, 42-discharge tray, 421-discharge hole, 5-spindle, 51-rotating joint, 52-inner water pipe, 53-feeding auger, 54-spacer sleeve, 55-disc knife, 551-first blade, 552-wear-resistant layer, 56-fixed knife block, 561-sealing groove, 562-sealing gasket, 563- Second blade, 57-guide key, 58-sleeve, 581-sealing inner ring, 6-left support, 61-first bearing chamber, 62-oil filling hole dust plug, 63-first bearing end cover, 64-first nut, 7-right support, 71-second bearing chamber, 72-second bearing end cover, 73-cover plate, 8-heating plate, 9-middle support frame, 100-cutting disc, 1001-third blade, 101-second nut, 102-third nut, 1021-gap adjustment threaded hole, 103-sprocket. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0045] Example:

[0046] like Figure 1 and Figure 2 As shown, the present invention provides a rubber plasticizing machine, comprising a water tank 1 and a tube body 2 built into the water tank 1, wherein a rotatable main shaft 5 is provided in the tube body 2, and the main shaft 5 is a hollow structure in which cooling circulating water is provided; a feed port 21 is provided on the side wall of one end of the tube body 2, and a discharge port is provided at the other end of the tube body 2;

[0047] The main shaft 5 is located at the position of the feed port 21 and is nested with a feed auger 53. The main shaft 5 is located at the position of the discharge port and is nested with a discharge tray 42. The discharge tray 42 is fixed to the tube body 2 and rotates relative to the main shaft 5. The main shaft 5 is also nested with a number of evenly distributed disc cutters 55. These disc cutters 55 are located between the feed auger 53 and the discharge tray 42. The feed auger 53 and the cutter disc 55 rotate synchronously with the main shaft 5.

[0048] The main shaft 5 is coaxial with the tube body 2, and the main shaft 5 is kept coaxial with the tube body 2 through the left bracket 3 at the position close to the feed port 21, and the main shaft 5 is kept coaxial with the tube body 2 through the right bracket 4 at the position close to the discharge port. The left bracket 3 and the right bracket 4 are respectively fixed to the two ends of the tube body 1 and fixed to the water tank 1 at the same time; the discharge tray 42 is fixed to the right bracket 4; further, in order to ensure the stability of the operation of the entire equipment, combined with Figure 1 A left support 6 is fixed on the left bracket 3, and a right support 7 is fixed on the right bracket 4. The left support 6 and the right support 7 are both rotatably connected to the main shaft 5. A sprocket 103 is provided at one end of the main shaft 5 close to the left support 6, and a cover plate 73 is nested on the right support 7. The cover plate 73 is fixed on the right bracket 7, and a through groove is provided on the cover plate 73 for discharging. At the same time, a support frame 9 is further provided in the middle of the tube body 2, and the support frame 9 is fixed on the water tank 1 and the tube body 2 for supporting the tube body 2; wherein the rotation connection between the left support 6 and the right support 7 and the main shaft 5 is realized through bearings, such as Figures 9 to 13 As shown, the left support 6 is provided with two first bearing chambers 61, in which three bearings are placed (their placement is as shown in FIG. Figure 9 As shown), the right support 7 is provided with a second bearing chamber 71, in which a bearing is placed (the placement method is as shown in FIG. Figure 12As shown), the inner ring of the bearing is nested on the main shaft 5, and the outer ring of the bearing is embedded in the corresponding left support 6 and the right support 7. Correspondingly, a first bearing end cover 66 and a second bearing end cover 72 are respectively provided on the left support 6 and the right support 7. A filling hole dust plug 62 is provided on the left support 6 and the second bearing end cover 72 for filling lubricating oil into the bearing.

[0049] A plurality of evenly distributed heating plates 8 and fixed knife blocks 56 are fixed on the outer wall of the tube body 2. These heating plates 8 and fixed knife blocks 56 are distributed in a linear array in the axial direction of the tube body 2 and in a circular array in the circumferential direction of the tube body 2. In addition, the heating plates 8 and the fixed knife blocks 56 are arranged alternately in the circumferential direction of the tube body 2, that is, Figure 1 As shown, the fixed blade blocks 56 are distributed in an axial array along the tube body 2, as shown in FIG. Figure 2 As shown, the fixed blade blocks 56 are arranged in a circumferential array along the direction of the arrow in the figure; the heating plate 8 is attached to the outer wall of the tube body 2, and the fixed guide block 56 passes through the outer wall of the tube body 2 and extends into the tube body 2. The cutter disc 55 and the fixed blade blocks 56 are also arranged alternately. When the cutter disc 55 rotates under the drive of the main shaft 5, a shearing effect is formed between the cutter disc 55 and its adjacent fixed blade blocks 56, thereby kneading and shearing the rubber. The heating plate 8 is a prior art, which adopts an arc-shaped structure, combined with Figure 2 , which is distributed in a triangle, so the central angle corresponding to the arc structure needs to be less than 60 degrees. For example, the heating ring sold by the existing e-commerce company Dengfeng Electric Heating Appliances (which can be customized in size), the heating plate 8 is attached to the outer wall of the tube body 2. Considering that a support frame 9 is provided in the middle of the tube body 2, this place will interfere with the placement of a certain heating plate 8, so the heating plate 8 is not provided there.

[0050] Further, combined Figures 6 to 8 The disc cutter 55 has three first blades 551 evenly distributed along the circumference, and the first blades 551 are provided with a wear-resistant layer (for example, TiN); Figure 15 and Figure 16 The fixed blade block 56 has a second blade 563, which extends into the tube body 2 and has a wedge-shaped end portion located in the tube body 2. The cross section of the second blade 563 is an isosceles trapezoid. The rotation direction of the first blade 551 is toward the tip of the wedge (the tip is as shown in FIG. Figure 16 (shown in j), that is Figure 2 The middle arrow indicates the direction of rotation of the main shaft 5; there is a gap between the disc cutter 55 and the fixed cutter block 56, and the gap is between 6mm and 7mm, preferably 6.5mm. The setting of this gap ensures the kneading effect of the rubber and reduces the slippage phenomenon. For this purpose, we conducted a comparative experiment, as shown in the following table:

[0051]

[0052] Among them, "tank" represents the parameters of the recycled rubber obtained during the cold operation in the traditional desulfurization process, "machine" represents the parameters of the recycled rubber obtained in this application, TA1, TA2, and A1 are grade codes, among which TA1 and TA2 represent special grade, and A1 represents excellent grade. It can be seen from the table that through the hot operation of this application and the reasonable gap setting between the disc knife 55 and the fixed knife block 56, the performance parameters of the recycled rubber obtained in this application have been greatly improved compared with the traditional process.

[0053] Furthermore, in order to form the kneaded rubber into strips (or floccules) and to cut it at the same time, a plurality of discharge holes 521 (such as Figure 18 As shown), a cutting disc 100 nested on the main shaft 5 is provided on the side of the discharge disc 42 away from the left bracket 3, and the cutting disc 100 rotates synchronously with the main shaft 5. The cutting disc 100 has a plurality of third blades evenly distributed along the circumference, and the cutting disc 100 is threadedly assembled on the main shaft 5 and is pressed against the shoulder of the main shaft 5. There is a gap between the cutting disc 100 and the discharge disc 42, and the gap is 8 mm; wherein the gap between the cutting disc 100 and the discharge disc 42 is combined with the rotation speed of the main shaft 5 to obtain rubber strips of different lengths, and the combination Figure 17 The inner ring of the discharge tray 42 is threadedly assembled with the third nut 102 (refer to the following description, the inner ring of the third nut 102 is threadedly connected with the main shaft 5, thereby pressing against the disc cutter 55). The discharge tray 42 is fixed to the right bracket 4 through the stepped hole opened thereon (such as Figure 18 The third nut 102 is provided with a plurality of evenly distributed gap adjustment threaded holes 1021, and the gap adjustment threaded holes 1021 are evenly distributed circumferentially, wherein a bolt for adjusting the gap is arranged, and the cutting knife disc 100 is tightened on the bolt through the second nut 101, and the gap can be changed according to the depth of the bolt screwed into the gap adjustment threaded hole 1021. At the same time, a locking bolt is also provided on the second nut 101, and the locking bolt passes through the second nut 101 and is tightened on the main shaft 5 to prevent loosening. Since the equipment of the present application is in the middle link of the recycled rubber process, there is no strict requirement for the specific length of the recycled rubber cut strips. Therefore, the adjustable range of the gap between the cutting knife disc 100 and the discharge disc 42 is not very large. The cutting knife disc 100 needs to be installed on the main shaft 5 by relying on a key connection. If the adjustment range of the gap is too large, it will affect the keyway, which may increase the length of the keyway, thereby increasing the cost and processing strength.

[0054] The present application forms a dual cooling effect inside and outside by passing water through the main shaft 5, and then combining it with the water tank 1. Since the main shaft 5 needs to rotate, a rotary joint 51 is provided at one end of the main shaft 5 away from the feed port 21, and an inner water pipe 52 is provided in the inner cavity of the main shaft 5, and the inner water pipe 52 is connected to the rotary joint 51. A water inlet pipe 11 is provided at the bottom of the water tank 1, and a water outlet pipe 12 is provided at the upper part of the water tank 1. The rotary joint 51 is a prior art. According to the requirements of this application, a HS duplex inner tube fixed rotary joint of a constant ring rotary joint is adopted, which can enter water from a single side and discharge water from the side, thereby not affecting the rotation of the main shaft 5; combined with Figure 3 , the arrows in the figure represent the direction of water flow.

[0055] like Figure 1 and Figure 2 As shown, since the rubber shearing process is achieved by using a disc knife 55 and a fixed knife block 56, and the fixed knife block 56 is inserted into the tube body 2, considering that the force on the fixed knife block 56 is large, the strength of the outer wall of the tube body 2 will be reduced after the hole is opened, so a long plate 22 is welded on the outer wall of the tube body 2, and a fixed knife hole 23 for the fixed knife block 56 to pass through is opened on the long plate 22 and the tube body 2 (as shown in FIG. Figure 4 As shown), the fixed knife block 56 is fixed to the long plate 22 by bolts, a sealing gasket 262 is provided between the fixed knife block 26 and the long plate 22, and a sealing groove for placing the sealing gasket 262 is provided at the contact position between the fixed knife block 56 and the long plate 22 (as shown). Figure 16 shown)

[0056] Combine Figure 1 and Figure 2 As shown, the feed auger 53 and the disc cutter 55 are connected by a key and rotate synchronously with the main shaft 5. Therefore, a keyway is provided on the main shaft 5, and a guide key 57 is provided. A spacer sleeve 54 is provided between the feed auger 55 and the left bracket 3, between the feed auger 53 and the disc cutter 55, and between two adjacent disc cutters 55. The spacer sleeve 54 is nested on the main shaft 5, and the spacer sleeve 54 between the feed auger 53 and the left bracket 3 is pressed against the shoulder of the main shaft 5 (as shown in FIG. Figure 11 As shown in FIG5 , the main shaft 5 is threadedly assembled with a third nut 102 at the discharge tray 42. The third nut 102 is tightly pressed against the disc cutter 55 away from the feed auger 53. The outer ring of the third nut 102 is further provided with an external thread. The discharge tray cooperates with the external thread of the third nut 102, thereby limiting the axial displacement of the feed auger 53, the disc cutter 55 and the spacer sleeve 54 through the third nut 102.

[0057] Furthermore, since the main shaft 5 will pass through part of the bearing end cover, the main shaft 5 is embedded with a sleeve 58 at the bearing end cover, and the sleeve 58 is tightly pressed against the corresponding bearing, such as Figure 9 As shown, at the position of the left support 6, the main shaft 5 passes through the two first bearing end covers 63 thereon, so a shaft sleeve 58 is provided at each of the two first bearing end covers 63. The matching relationship between the shaft sleeve 58 and the main shaft 1 is as shown in FIG. Figure 9 As shown, the first bearing end cover 63 is sealed with the shaft sleeve 58, as shown in FIG. Figure 9 As shown, a sealing ring is provided at the junction of the first bearing end cover 63 and the shaft sleeve 58, and two first nuts 64 are provided between the first bearing end cover 63 near the sprocket 103 and the sprocket 103 for tightening the shaft sleeve 58 on the bearing; similarly, as shown Figure 12 As shown, since the main shaft 5 only passes through one second bearing end cover 72 of the right support 7, the main shaft 5 is provided with a shaft sleeve 58 at the second bearing end cover 72 passed through. The matching relationship between the shaft sleeve 58 and the main shaft 5 is as shown in FIG. Figure 12 As shown, the second bearing end cap 72 that is also passed through is also sealed with the shaft sleeve 58 and is also provided with a sealing ring. The bearing end cap 72 that is not passed through by the main shaft 5 in the right support 7 is sealed with the rotary joint 51; further combination Figure 11 A sealing inner ring 581 is also provided on the shaft sleeve 58 near the feed auger 55 in the left support 6, thereby playing a sealing role to prevent external dirt from entering the tube body 2.

[0058] In this embodiment, in conjunction with the accompanying drawings, we provide the size parameters and matching parameters of some components. During actual manufacturing, they can be set according to the parameters in the above drawings, where the unit of the length dimension is millimeter.

[0059] During use, the rubber in the previous process enters the tube body 2 through the feed port 21. Under the rotation of the main shaft 5, the feed auger 53 pushes the rubber into the tube body 2 and is fully kneaded and sheared through the relative movement of the disc knife 55 and the fixed knife block 56. At the same time, the heating plate 8 heats the entire tube body 2 and introduces circulating cold water to maintain the temperature of the tube body 2 at about 350 degrees Celsius, thereby performing a thermal operation on the rubber, reducing the amount of water droplets generated in the rubber and thus reducing the slipping phenomenon. At the same time, the setting of the gap between the disc knife 55 and the fixed knife block 56 further reduces the slipping phenomenon. Since the viscosity of the rubber will increase during the thermal operation, There will be adhesion. On the one hand, the continuous pushing of the feed auger 53 can help the rubber move toward the discharge port. On the other hand, the circulating cold water can quickly reduce the temperature by performing internal and external dual cooling of the main shaft 5 to avoid excessive temperature, excessive viscosity of the rubber, or even carbonization, which increases the load of the main shaft 5. After the rubber passes through the feed port 21 and is rubbed and sheared by the disc knife 55 and the fixed knife block 56, its structure is destroyed, so that its plasticity is restored. At the same time, the setting of the cutting knife disc 100 and the discharge disc 42 allows the rubber to form strips or flocs after coming out, which further facilitates the subsequent processing of the rubber.

[0060] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A rubber plasticizing machine, characterized in that: It includes a water tank and a tube body built into the water tank, wherein a rotatable main shaft is provided in the tube body, and the main shaft is a hollow structure in which cooling circulating water is provided; a feed port is provided on the side wall of one end of the tube body, and a discharge port is provided at the other end of the tube body; A feed auger is nested at the position of the main shaft located at the feed port, and a discharge tray is nested at the position of the main shaft located at the discharge port. The discharge tray is fixed to the tube body and rotates relative to the main shaft. A plurality of evenly distributed disc cutters are also nested on the main shaft, and these disc cutters are located between the feed auger and the discharge tray. The feed auger and the disc cutters rotate synchronously with the main shaft. A plurality of evenly distributed heating plates and fixed blade blocks are fixed on the outer wall of the tube body. These heating plates and fixed blade blocks are arranged in a linear array in the axial direction of the tube body and in a circular array in the circumferential direction of the tube body. In addition, the heating plates and fixed blade blocks are arranged alternately in the circumferential direction of the tube body. The heating plates are attached to the outer wall of the tube body, and the fixed blade blocks extend through the outer wall of the tube body into the tube body. The disc cutter has a plurality of first blades uniformly distributed along the circumference, each of the first blades being provided with a wear-resistant layer. The fixed blade block has a second blade, the second blade extending into the tube body and the end of the second blade located within the tube body being wedge-shaped, with the first blade rotating toward the tip of the wedge. A gap is defined between the disc cutter and the fixed blade block, the gap being between 6 mm and 7 mm. The main shaft is kept coaxial with the tube body through the left bracket at a position close to the feed port, and is kept coaxial with the tube body through the right bracket at a position close to the discharge port. The left bracket and the right bracket are respectively fixed to both ends of the tube body and are fixed to the water tank at the same time; the discharge tray is fixed to the right bracket; The discharge disc is provided with a plurality of discharge holes evenly distributed along the circumference. A cutting disc nested on the main shaft is provided on the side of the discharge disc away from the left bracket. The cutting disc rotates synchronously with the main shaft. The cutting disc has a plurality of third blades evenly distributed along the circumference. The cutting disc is threadedly assembled on the main shaft through a second nut that is pressed against the shoulder of the main shaft. There is a gap between the cutting disc and the discharge disc, and the gap is 8 mm.

2. A rubber plasticizing machine according to claim 1, characterized in that: A rotary joint is provided at one end of the main shaft away from the feed port, an inner water pipe is provided in the inner cavity of the main shaft, the inner water pipe is connected to the rotary joint, a water inlet pipe is provided at the bottom of the water tank, and a water outlet pipe is provided at the upper part of the water tank.

3. A rubber plasticizing machine as claimed in claim 2, characterized in that: A left support is fixed on the left bracket, and a right support is fixed on the right bracket. Both the left support and the right support are rotatably connected to the main shaft. A sprocket is provided at one end of the main shaft close to the left support. A cover plate is nested on the right support, and the cover plate is fixed on the right bracket. A through groove is provided on the cover plate.

4. A rubber plasticizing machine as claimed in claim 2, characterized in that: A long plate is provided between the fixed knife block and the tube body, the long plate is fixed on the tube body, and fixed knife holes for the fixed knife block to pass through are provided on the long plate and the tube body; the fixed knife block is fixed to the long plate by bolts, a sealing gasket is provided between the fixed knife block and the long plate, and a sealing groove for the sealing gasket to be placed is provided at the contact position between the fixed knife block and the long plate.

5. A rubber plasticizing machine as claimed in claim 2, characterized in that: A spacer sleeve is provided between the feed auger and the left bracket, between the feed auger and the disc cutter, and between two adjacent disc cutters. The spacer sleeve is nested on the main shaft. The spacer sleeve between the feed auger and the left bracket is pressed against the shoulder of the main shaft. The main shaft is threadedly assembled with a third nut at the discharge tray. The third nut is pressed against the disc cutter away from the feed auger. The outer ring of the third nut is provided with an external thread, the discharge tray is assembled with the external thread of the third nut, and the third nut is provided with a plurality of evenly distributed gap adjustment threaded holes.

6. A rubber plasticizing machine as claimed in claim 3, characterized in that: Bearings are provided in both the left support and the right support, the inner rings of the bearings are nested on the main shaft, and the outer rings of the bearings are embedded in the corresponding left support and the right support.

7. A rubber plasticizing machine according to claim 1, characterized in that: The feed auger and the disc cutter are connected by keys and rotate synchronously with the main shaft. A key slot is provided on the main shaft, and a guide key is provided in the key slot. A middle support frame is also provided between the pipe body and the water tank.

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