Expander die hole plug equipment for reducing volatility of ethylene propylene rubber

Abstract

The utility model discloses expansion machine die hole plug equipment for reducing volatility of ethylene propylene rubber, which comprises a rubber expansion machine, one end of the rubber expansion machine is connected with a template through a detachable unit, the outer wall of the rubber expansion machine is connected with a plurality of heating blocking mechanisms, one end of each heating blocking mechanism extends into the rubber expansion machine, and the other end of each heating blocking mechanism extends into the rubber expansion machine. One end, far away from the template, of the rubber expansion machine is connected with a primary water filtering unit, one side, far away from the rubber expansion machine, of the primary water filtering unit is connected with a speed reducer, the speed reducer is connected with a screw rod, a rod body of the screw rod penetrates through the primary water filtering unit, and the rod body of the screw rod is arranged in the rubber expansion machine. According to the utility model, through propelling and pressurizing of the screw rod of the expansion machine, the rubber material and the shearing screw are continuously sheared under pressure to generate heat, enough energy is gathered, the conditions required by water gasification are met, when the rubber material passes through the porous die hole plug on the template, the contact area of the rubber material and air is larger and more uniform, volatile components are easy to dissipate, the volatility of rubber is reduced, and the production efficiency is improved. The ethylene propylene rubber drying expansion effect is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of synthetic rubber extrusion processing equipment, in particular to expander die hole plugging equipment for reducing the volatility of ethylene propylene rubber. Background Art

[0002] The EPDM rubber is extruded by the extruder dehydrator to remove the water on the surface of the rubber. The moisture content of the rubber at the outlet of the extruder dehydrator is 8%-12%, of which about 2% is the residual moisture on the surface of the rubber, and the rest is the moisture contained in the rubber. This part of moisture is generated by the condensation section and cannot be removed by extrusion dehydration. In order to solve this part of the water contained in the rubber, the EPDM rubber after extrusion dehydration is pushed and pressurized by the expander screw. The rubber and the shear screw are continuously sheared and heated under pressure, and sufficient energy is gathered to meet the conditions required for water vaporization. When passing through the single-hole mold plug on the template, the rubber reaches the normal pressure zone from the high-pressure zone, the rubber expands, the water contained in the rubber is vaporized, and the water-containing rubber film is exploded, so that the rubber is in a multi-capillary state, which is conducive to the subsequent fluidized bed supplementary drying, and the remaining moisture is removed, thereby obtaining a finished rubber with a water content of less than 0.5%.

[0003] When a single-hole die plug is used, the front-end process of EPDM rubber is unstable, resulting in incomplete extrusion and dehydration, which affects the material intake of the expansion dryer and causes poor rubber expansion effect. Utility Model Content

[0004] The utility model aims to provide an expander die hole plug device for reducing the volatility of EPDM rubber, thereby solving the problem of poor expansion effect of EPDM rubber in an expansion dryer in the prior art.

[0005] The technical scheme adopted by the utility model is an expander die hole plug device for reducing the volatility of EPDM rubber, comprising a rubber expander, one end of the rubber expander is connected to a template through a detachable unit, the outer wall of the rubber expander is connected to a plurality of heat blocking mechanisms, one end of the heat blocking mechanisms extends into the interior of the rubber expander, the end of the rubber expander away from the template is connected to a primary water filtration unit, the side of the primary water filtration unit away from the rubber expander is connected to a reducer, the reducer is connected to a screw, the shaft of the screw passes through the primary water filtration unit, and the shaft of the screw is arranged in the rubber expander.

[0006] The utility model is also characterized in that:

[0007] The detachable unit comprises a connecting rod, one end of which is connected to the outer wall of the template through bolts, and the other end of which is connected to the outer wall of the rubber expander through bolts, and the template and the rubber expander are coaxially arranged.

[0008] A number of mold holes are evenly arranged on the plate surface of the template.

[0009] The heat blocking mechanism includes a connecting plate, which is arranged along the length of the rubber expander. The connecting plate is evenly connected with a plurality of shear screws along its length direction. The shear screws pass through the side wall of the rubber expander, and the ends of the shear screws extending into the rubber expander are arranged close to the screw rods.

[0010] A plate surface of one of the connecting plates is respectively connected with a plurality of instrument detection ports along its length direction.

[0011] The end of the rubber expander close to the template is connected with a steam heating pipe.

[0012] The primary water filtration unit comprises a filter box, opposite sides of which are respectively connected to a rubber expander and a reducer, a screw rod passes through the filter box, a hopper is connected to the top of the filter box, and a filter plate is connected to the inner wall of the filter box.

[0013] The beneficial effects of the utility model are:

[0014] The utility model discloses an expander die hole plug device for reducing volatility of EPDM rubber. By pushing and pressurizing the expander screw, the rubber material and the shear screw are continuously sheared and heated under pressure, and sufficient energy is gathered to meet the conditions required for water vaporization. When the rubber material passes through the porous die hole plug on the template, the contact area with the air is larger and more uniform, and the volatile components are easily lost, so that the volatility of the rubber is reduced and the drying expansion effect of the EPDM rubber is further increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the expander die hole plug device for reducing the volatility of EPDM rubber according to the utility model;

[0016] Figure 2 The utility model is a structural schematic diagram of a template in an expander die hole plug device for reducing volatility of EPDM rubber.

[0017] In the figure: 1. rubber expander, 2. template, 21. mold hole, 3. reducer, 4. screw, 5. connecting rod, 6. connecting plate, 7. shear screw, 8. filter box, 9. hopper, 10. filter plate, 11. instrument detection port, 12. steam heating pipe. DETAILED DESCRIPTION

[0018] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0019] The utility model is an expander die hole plug device for reducing the volatility of EPDM rubber, such as Figure 1As shown, it includes a rubber expander 1, one end of the rubber expander 1 is connected to a template 2 through a detachable unit, the outer wall of the rubber expander 1 is connected to a plurality of heat blocking mechanisms, one end of the heat blocking mechanism extends into the interior of the rubber expander 1, the end of the rubber expander 1 away from the template 2 is connected to a primary water filtration unit, the side of the primary water filtration unit away from the rubber expander 1 is connected to a reducer 3, the reducer 3 is connected to a screw 4, the rod body of the screw 4 passes through the primary water filtration unit, and the rod body of the screw 4 is arranged in the rubber expander 1. The power source of the reducer 3 is the motor. The rubber material containing water in the rubber package enters the primary water filtration unit to filter out a large amount of clear water in the slurry. The reducer 3 is driven by the motor to move, and then drives the screw 4 to rotate. The screw 4 drives the material to move axially in the rubber expander 1. During the movement, the material and the blocking heating mechanism generate heat by shearing under pressure. The temperature and pressure of the material rise from 90°C and normal pressure to 170°C and 3.0MPa respectively. The high-temperature and high-pressure material is squeezed out at the template 2 and then expands and explodes rapidly, volatilizing the water and harmful gases wrapped in the rubber, so that the moisture and harmful component content of the rubber product will reach the standard value.

[0020] Example 1

[0021] The detachable unit includes a connecting rod 5, one end of which is connected to the outer wall of the template 2 by bolts, and the other end of the connecting rod 5 is connected to the outer wall of the rubber expander 1 by bolts, and the template 2 is coaxially arranged with the rubber expander 1. The number of connecting rods 5 is set to multiple, and the multiple connecting rods 5 are arranged along the circumference of the template 2 to fix the template 2 and the rubber expander 1. The connecting rods 5 are detachably connected, which is convenient for disassembly and assembly during equipment maintenance.

[0022] The plate surface of the template 2 is evenly provided with a plurality of mold holes 21. When a plurality of mold holes 21 are provided on the surface of the template 2, the contact area between the rubber and the air is larger and more even, and the volatile components are more easily dissipated. Under the same operating temperature and pressure in the expander body, the rubber expansion effect will be better, thereby ensuring that the volatility of the EPDM rubber is significantly reduced to improve the product performance quality.

[0023] Example 2

[0024] The heat blocking mechanism includes a connecting plate 6, which is arranged along the length of the rubber expander 1. The connecting plate 6 is evenly connected with a plurality of shear screws 7 along its length direction. The shear screws 7 pass through the side wall of the rubber expander 1, and the ends of the shear screws 7 extending into the rubber expander 1 are arranged close to the screw 4. A plurality of connecting plates 6 are arranged along the circumference of the outer wall of the rubber expander 1, and their length direction is consistent with the direction of the rubber expander 1. The distance between the ends of the shear screws 7 extending into the rubber expander 1 and the screw 4 is about 5 mm, so as to ensure that the rubber material and the shear screws 7 are continuously sheared and heated under pressure, and sufficient energy is gathered to meet the conditions required for water vaporization.

[0025] The plate surface of one of the connecting plates 6 is respectively connected with a plurality of instrument detection ports 11 along its length direction. Instruments such as pressure gauges and temperature gauges are installed at the instrument detection ports 11 to monitor various data in the rubber expander 1.

[0026] Example 3

[0027] The end of the rubber expander 1 close to the template 2 is connected with a steam heating pipe 12. Steam is introduced into the rubber expander 1 through the steam heating pipe 12 to preheat the rubber expander 1 before starting.

[0028] The primary water filtration unit includes a filter box 8, the two opposite sides of which are respectively connected to the rubber expander 1 and the reducer 3, the screw 4 passes through the filter box 8, the top of the filter box 8 is connected to a hopper 9, and the inner wall of the filter box 8 is connected to a filter plate 10. The rubber material containing water in rubber enters the filter box 8 from the hopper 9, passes through the filter plate 10 to filter out a large amount of clear water, and then the screw 4 drives the rubber material to advance and pressurize.

[0029] The working principle of the expander die hole plugging device for reducing the volatility of EPDM rubber is as follows:

[0030] The rubber material containing water in rubber enters the filter box 8 from the hopper 9, and a large amount of clear water is filtered out through the filter plate 10. The screw 4 rotates, and the screw 4 drives the rubber to move axially in the rubber expander 1 to advance and pressurize. During the movement, the rubber and the shear screw 7 are continuously sheared under pressure to generate heat, gather enough energy to meet the conditions required for water vaporization, and reach the porous template 2. The contact area between the rubber and the air is larger and more uniform, and it is easier to dissipate the volatile components. Then, the high-temperature and high-pressure rubber is squeezed out at the template 2 at the outlet end of the expander and then expands and explodes rapidly, volatilizing the water and harmful gases wrapped in the rubber, so that the water and harmful component content of the rubber product will reach the standard value, thereby ensuring that the volatility of EPDM rubber is significantly reduced to improve the product performance quality.

[0031] The utility model discloses an expander die hole plug device for reducing volatility of EPDM rubber. By pushing and pressurizing the expander screw, the rubber material and the shear screw are continuously sheared and heated under pressure, and sufficient energy is gathered to meet the conditions required for water vaporization. When the rubber material passes through the porous die hole plug on the template, the contact area with the air is larger and more uniform, and the volatile components are easily lost, so that the volatility of the rubber is reduced and the drying expansion effect of the EPDM rubber is further increased.

Claims

1. An expander die plug device for reducing the volatility of EPDM rubber, characterized in that: The invention comprises a rubber expansion machine (1), one end of which is connected to a template (2) via a detachable unit, the outer wall of the rubber expansion machine (1) is connected to a plurality of heat-blocking mechanisms, one end of which extends into the interior of the rubber expansion machine (1), the end of the rubber expansion machine (1) away from the template (2) is connected to a primary water filtration unit, the side of the primary water filtration unit away from the rubber expansion machine (1) is connected to a reducer (3), the reducer (3) is connected to a screw (4), the shaft of the screw (4) passes through the primary water filtration unit, and the shaft of the screw (4) is arranged in the rubber expansion machine (1).

2. The expander die hole plugging device for reducing the volatility of EPDM rubber according to claim 1, characterized in that: The detachable unit comprises a connecting rod (5), one end of which is connected to the outer wall of the template (2) by means of bolts, and the other end of which is connected to the outer wall of the rubber expander (1) by means of bolts, and the template (2) and the rubber expander (1) are coaxially arranged.

3. The expander die hole plugging device for reducing the volatility of EPDM according to claim 2, characterized in that: The plate surface of the template (2) is evenly provided with a plurality of mold holes (21).

4. The expander die hole plugging device for reducing the volatility of EPDM according to claim 1, characterized in that: The heat blocking mechanism comprises a connecting plate (6), the connecting plate (6) being arranged along the length of the rubber expander (1), the connecting plate (6) being evenly connected with a plurality of shear screws (7) along its length direction, the shear screws (7) passing through the side wall of the rubber expander (1), and the end of the shear screw (7) extending into the rubber expander (1) being arranged close to the screw rod (4).

5. The expander die hole plugging device for reducing the volatility of EPDM rubber according to claim 4, characterized in that: A plate surface of one of the connecting plates (6) is respectively connected to a plurality of instrument detection ports (11) along its length direction.

6. The expander die hole plugging device for reducing the volatility of EPDM according to claim 4, characterized in that: The end of the rubber expander (1) close to the template (2) is connected to a steam heating pipe (12).

7. The expander die hole plugging device for reducing the volatility of EPDM rubber according to claim 1, characterized in that: The primary water filtration unit comprises a filter box (8), the two opposite sides of the filter box (8) are respectively connected to the rubber expander (1) and the reducer (3), the screw (4) passes through the filter box (8), the top of the filter box (8) is connected to a hopper (9), and the inner wall of the filter box (8) is connected to a filter plate (10).

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