Granulator for preparing EPDM (ethylene-propylene-diene monomer) granules

Abstract

The invention relates to the technical field of granulators, and discloses a granulator for preparing EPDM (Ethylene-Propylene-Diene Monomer) granules, the granulator for preparing EPDM granules comprises a screw extruder, a mold, a cooling pond and a granulator which are connected in sequence, and a plurality of conveying mechanisms and a control mechanism are arranged on the cooling pond; the conveying mechanism comprises two locking assemblies, two conveying wheels and two displacement monitoring assemblies which are symmetrically arranged on the cooling pool; after an EPDM wire material is generated through the screw extruder and the mold, the EPDM wire material enters the position between the pair of conveying wheels, and after the two conveying wheels are locked through the two locking assemblies, the two conveying wheels are driven by the control mechanism to carry the EPDM wire material to be conveyed to the granulator so as to prepare EPDM particles. According to the pelletizer for preparing the EPDM particles, EPDM wire materials can be laid, guided and continuously conveyed through automatic locking and unlocking of the conveying wheels, common strip breaking working conditions are intelligently coped, strip breaking areas are cleared away in time, and the product quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of granulators, in particular to a granulator for preparing EPDM particles. Background Art

[0002] EPDM is a copolymer of ethylene, propylene and a small amount of non-conjugated dienes, and is a type of ethylene-propylene rubber, represented by EPDM. EPDM has excellent aging resistance such as ozone resistance, heat resistance, and weather resistance, and can be widely used in automotive parts, waterproof materials for buildings, wire and cable sheaths, heat-resistant hoses, tapes, automotive seals and other fields.

[0003] The raw material for processing EPDM products is EPDM granules. The preparation process of EPDM granules is to mix the various component raw materials of EPDM, use a screw extruder to form EPDM strands, and then granulate the EPDM strands through a pelletizer after cooling.

[0004] In the prior art, EPDM strands need to go through a long cooling period before entering the pelletizer. In the cooling pool, conveying equipment such as conveyor rollers need to be installed to continuously feed the EPDM strands into the pelletizer. When the EPDM strands first come out of the screw extruder, they need to be manually guided through multiple sets of conveyor rollers and fed into the pelletizer. This processing method not only increases the consumption of manpower, but also makes it easy for the EPDM strands to break or break due to uneven force application.

[0005] Therefore, in order to solve the above technical problems existing in the prior art, a cold-resistant PVC cable material and a preparation method are proposed. Summary of the invention

[0006] The present invention provides a pelletizer for preparing EPDM particles, which can utilize the automatic locking and unlocking of the conveying wheel to guide the laying and continuous conveying of the EPDM strands, and can intelligently respond to common broken strand conditions, timely clear the broken strand area, and ensure the beneficial effect of product quality. The present invention solves the problem that in the prior art mentioned in the above background technology, when the EPDM strands first come out of the screw extruder, the EPDM strands need to be manually guided to pass through multiple groups of conveying rollers and be sent into a pelletizer, which not only increases the manpower consumption, but also the problem that manual pulling of the EPDM strands is prone to breakage and damage of the EPDM strands due to reasons such as uneven force application.

[0007] The present invention provides the following technical solution: a granulator for preparing EPDM particles, comprising a screw extruder, a die, a cooling pool and a pelletizer connected in sequence, wherein the cooling pool is provided with a plurality of conveying mechanisms and control mechanisms; The conveying mechanism comprises two locking components, two conveying wheels and two displacement monitoring components symmetrically arranged on the cooling pool; After the EPDM strands are generated by the screw extruder and the die, the EPDM strands enter between the pair of conveying wheels, and after the two conveying wheels are locked by the two locking assemblies, the two conveying wheels are driven by the control mechanism to convey the EPDM strands to the pelletizer to prepare EPDM pellets; Then, the control mechanism drives the pair of conveying wheels to reset, and releases the locking of the pair of conveying wheels by the two locking assemblies, so that the pair of conveying wheels rotate in opposite directions to continuously convey the EPDM strands.

[0008] As an optional solution of the granulator for preparing EPDM particles of the present invention, the conveying mechanism further includes a mounting seat slidably disposed in the cooling pool; The displacement monitoring component includes a displacement sensor arranged on the mounting seat. The mounting seat is provided with an arc groove. A slide seat is slidably arranged in the arc groove. The slide seat is elastically connected to the mounting seat through a first spring. The conveying wheel is slidably arranged in the mounting seat.

[0009] As an optional solution of the granulator for preparing EPDM particles described in the present invention, the control mechanism includes a first drive component and a second drive component, the first drive component includes a drive seat slidably arranged in the cooling pool, a first cylinder and a top column are arranged on the drive seat, and the output shaft of the first cylinder is connected to the top column.

[0010] As an optional solution of the granulator for preparing EPDM particles of the present invention, two first insertion rods are arranged on the top column, and two mounting seats in a set of conveying mechanisms are provided with first slots, and the two first slots are respectively adapted to the two first insertion rods; A first motor is arranged in the cooling pool, a screw rod is arranged on the output shaft of the first motor, and the driving seat is threadedly connected to the screw rod.

[0011] As an optional solution of the granulator for preparing EPDM particles of the present invention, a plurality of the second drive components are provided, and the plurality of the second drive components are respectively connected to a plurality of the mounting seats; The second driving component includes a first slide groove opened in the cooling pool, a first slider is slidably arranged in the first slide groove, the first slider is elastically connected to the inner wall of the first slide groove through a second spring, and the first slider is connected to the mounting seat through a connecting component.

[0012] As an optional solution of the granulator for preparing EPDM particles of the present invention, a second chute is further provided in the cooling pool, and a second slider is slidably provided in the second chute; The second driving assembly further includes a first connecting rod, and two ends of the first connecting rod are respectively movably hinged to the first slider and the second slider through hinge shafts; The mounting seat is provided with a second plugging rod, and the second sliding block is provided with a second slot adapted to the second plugging rod.

[0013] As an optional solution of the granulator for preparing EPDM particles described in the present invention, the connecting assembly includes a third slide groove opened on the mounting seat, a third plug rod is slidably arranged in the third slide groove, the third plug rod is elastically connected to the inner wall of the third slide groove through a fourth spring, and a third slot adapted to the third plug rod is opened on the first sliding block; Two first push plates are symmetrically arranged on the top column, and two third insertion rods on a group of the mounting seats are each provided with a second push plate, and the two second push plates are respectively adapted to the two first push plates.

[0014] As an optional solution of the granulator for preparing EPDM particles of the present invention, the locking assembly includes a connecting cylinder arranged on the sliding seat, and two latching teeth are symmetrically arranged in the connecting cylinder; A slide rod is slidably arranged on the connecting tube, the slide rod is elastically connected to the connecting tube via a fifth spring, and a connecting seat is arranged on both of the two latch teeth; The locking assembly also includes two second connecting rods, one end of each of which is movably hinged to the sliding rod through a hinge shaft, and the other end of each of which is movably hinged to the two connecting seats through a hinge shaft. A guide groove is provided on the cooling pool, and the sliding rod is slidably connected to the guide groove.

[0015] As an optional solution of the granulator for preparing EPDM particles described in the present invention, a cutting mechanism is arranged on the cooling pool, and the cutting mechanism includes a second cylinder arranged on the cooling pool, and a cutter is arranged on the output shaft of the second cylinder.

[0016] As an optional solution of the granulator for preparing EPDM particles described in the present invention, two conveying rollers and two second motors are also provided on the cooling pool, the output shafts of the two second motors are respectively connected to the two conveying rollers, and the EPDM strands are slidably arranged on the two conveying rollers.

[0017] The present invention has the following beneficial effects: 1. The granulator for preparing EPDM particles controls the multiple pairs of conveying wheels installed on the cooling pool to automatically lock and unlock along with the guide groove through the locking assembly. When the EPDM strands are discharged for the first time, the multiple pairs of conveying wheels automatically lock and relay the EPDM strands to complete the laying and guiding of the EPDM strands. This can avoid problems such as breakage and damage caused by manual guidance.

[0018] 2. This EPDM granule preparation granulator can timely handle the common broken strand problem in the granulation process of the EPDM granule preparation process without affecting the normal operation of the production line. First, displacement monitoring components are installed on several groups of conveying wheels used to convey EPDM strands. When stress changes are detected in one group of conveying wheels, the occurrence of broken strands can be determined. Then, the broken strand areas on the front and rear EPDM strands are accurately cut off. This ensures that the EPDM strands that finally enter the granulator have no poor quality areas caused by various causes of broken strands.

[0019] 3. When dealing with the broken strand condition, the pelletizer for preparing EPDM pellets also takes into account that the previous section of EPDM strands at the break may be offset due to stress, so that the previous section of EPDM strands deviates from the horizontal conveying track and cannot enter the pelletizer normally. In response to this, after the previous set of conveying wheels at the broken strand is detected, it stops rotating and moves backward along the conveying track, and cooperates with the conveying of the front conveying wheels to straighten and align the previous section of the EPDM strands so that it can be normally connected to the subsequent conveying wheels. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a first overall structural schematic diagram of the present invention.

[0021] Figure 2 It is a second overall structural schematic diagram of the present invention.

[0022] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the cooling pool of the present invention.

[0023] Figure 4 It is a schematic diagram of the first partial cross-sectional structure of the cooling pool of the present invention.

[0024] Figure 5 For the present invention Figure 4 A partial enlarged view of point A in the middle.

[0025] Figure 6 It is a second partial cross-sectional structural schematic diagram of the cooling pool of the present invention.

[0026] Figure 7 It is a structural schematic diagram of a conveying mechanism of the present invention.

[0027] Figure 8It is a schematic diagram of the first explosion structure of the conveying mechanism of the present invention.

[0028] Fig. 9 It is a schematic diagram of the second explosion structure of the conveying mechanism of the present invention.

[0029] Fig.10 It is a structural schematic diagram of the locking assembly in the present invention.

[0030] Fig.11 It is a schematic diagram of the process of processing the broken bar condition of the present invention.

[0031] In the figure: 100, EPDM wire material; 200, screw extruder; 210, mold; 220, cooling pool; 230, pelletizer; 240, conveying roller; 250, second motor; 300, conveying mechanism; 310, locking assembly; 311, connecting cylinder; 312, latching teeth; 313, slide rod; 314, connecting seat; 315, second connecting rod; 316, guide groove; 317, fifth spring; 320, conveying wheel; 330, displacement monitoring assembly; 331, displacement sensor; 332, arc groove; 333, slide seat; 334, first spring; 340, mounting seat; 400, control mechanism; 410, first driving assembly; 411, driving Moving seat; 412, first cylinder; 413, push column; 414, first plug rod; 415, first slot; 416, first motor; 417, screw rod; 418, first push plate; 419, second push plate; 420, second driving assembly; 421, first slide groove; 422, first slider; 423, second spring; 424, second slide groove; 425, second slider; 426, first connecting rod; 427, second plug rod; 428, second slot; 430, connecting assembly; 431, third slide groove; 432, third plug rod; 433, fourth spring; 434, third slot; 500, cutting mechanism; 510, second cylinder; 520, cutting machine. DETAILED DESCRIPTION

[0032] 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. Example

[0033] For details, please refer to Figure 1-Figure 11 A granulator for preparing EPDM particles includes a screw extruder 200, a mold 210, a cooling pool 220 and a pelletizer 230 connected in sequence, and the cooling pool 220 is provided with a plurality of conveying mechanisms 300 and a control mechanism 400.

[0034] The conveying mechanism 300 includes two locking assemblies 310 symmetrically arranged on the cooling pool 220 , two conveying wheels 320 and two displacement monitoring assemblies 330 .

[0035] After the EPDM strands 100 are generated by the screw extruder 200 and the mold 210, the EPDM strands 100 enter between a pair of conveying wheels 320. After the two conveying wheels 320 are locked by two locking assemblies 310, the two conveying wheels 320 are driven by the control mechanism 400 to convey the EPDM strands 100 to the pelletizer 230 to prepare EPDM pellets.

[0036] Then, the control mechanism 400 drives the pair of conveying wheels 320 to reset, and releases the locking of the pair of conveying wheels 320 by the two locking assemblies 310, so that the pair of conveying wheels 320 rotate in opposite directions to continuously convey the EPDM strands 100.

[0037] A cutting mechanism 500 is disposed on the cooling pool 220 . The cutting mechanism 500 includes a second cylinder 510 disposed on the cooling pool 220 . A cutter 520 is disposed on an output shaft of the second cylinder 510 .

[0038] Two conveying rollers 240 and two second motors 250 are also provided on the cooling pool 220 . The output shafts of the two second motors 250 are respectively connected to the two conveying rollers 240 . The EPDM strands 100 are slidably provided on the two conveying rollers 240 .

[0039] In this embodiment: First of all, it should be noted that in the actual production process, when the raw material is extruded through the mold 210 by the screw extruder 200, the mold cavity of the mold 210 can form a plurality of EPDM wires 100 arranged in various ways, and only one EPDM wire 100 is used as an example in the figure. The cooling pool 220 can be cooled by water or air, and the EPDM wire 100 enters through the feed port on the front side of the pelletizer 230 for pelletizing, and then is discharged from the discharge port on the rear side of the pelletizer 230. After being collected and dried, cold-resistant PVC cable material can be obtained. The screw extruder 200, the mold 210, the cooling pool 220 and the pelletizer 230 are conventional equipment, and their technical principles and specific structures are not described in detail.

[0040] The EPDM strands 100 are transported in the cooling pool 220 by means of a plurality of bilaterally symmetrical transport mechanisms 300, with two bilaterally symmetrical transport mechanisms 300 forming a group. In a group of transport mechanisms 300, two transport wheels 320 slightly press on the left and right sides of the EPDM strands 100, without causing deformation of the cylindrical EPDM strands 100.

[0041] In addition, two conveying rollers 240 are installed near the pelletizer 230. After the two conveying rollers 240 are driven by two second motors 250 to rotate in opposite directions, the EPDM strands 100 can be actively dragged into the pelletizer 230. The friction of the strands causes the two conveying wheels 320 to rotate in opposite directions and maintain a synchronous speed. The EPDM strands 100 can be conveyed by several groups of conveying wheels 320 to undergo a long cooling process from front to back.

[0042] Since the cooling process is long, the number of conveying wheels 320 is limited, and there is a certain distance between two pairs of conveying wheels 320. When the EPDM strands first come out of the mold 210, from front to back, the EPDM strands first pass between the first pair of conveying wheels 320. At this time, by locking the two conveying wheels 320 so that they cannot rotate, the EPDM strands can be clamped, and then the two conveying wheels 320 are moved back a certain distance from front to back at a speed synchronized with the discharge of the EPDM strands to be fed between the next pair of conveying wheels 320. By analogy, the EPDM strands can be gradually fed between the two conveying rollers 240 through multiple pairs of conveying wheels 320, and then fed into the pelletizer 230.

[0043] In addition, the multiple pairs of conveying wheels 320 have another use mode. In the process of EPDM granulation, there are some common problems that will cause the granulation quality to decline. Broken strands are one of the problem conditions. The causes of broken strands include external impurities, internal impurities, poor plasticization of materials, differences or changes in raw material properties, poor exhaust, too rigid materials, too cold water or too much water, traction mismatch, etc.

[0044] Fig.11 From top to bottom are four processes for dealing with broken strip conditions. Three pairs of conveying wheels 320 are set from front to back as a / b / c, three points. After the strip is broken due to various reasons, the EPDM strand 100 is broken into two parts, front and back. At this time, the two conveying wheels 320 at the third point c detect the occurrence of the broken strip. According to the time detected at the third point c and the relatively constant conveying speed of the EPDM strand 100 as a whole, the second cylinder 510 can drive the cutter 520 downward, and the cutter 520 runs to cut a section near the broken strip of the latter section, and the cut part will not enter the pelletizer 230.

[0045] When the EPDM strand 100 is broken, the previous section of the EPDM strand 100 may no longer be located on the horizontal backward conveying track during subsequent conveying due to stress. At this time, the conveying wheel 320 at the third point c may not be able to capture the previous section.

[0046] The two conveying wheels 320 at the second point b are controlled to stop rotating, and the front section of the EPDM wire material 100 is no longer conveyed backward. Instead, the two conveying wheels 320 are controlled to move backward at a faster speed while clamping the EPDM wire material 100. At the same time, the two conveying mechanisms 300 at the third point c move away from the EPDM wire material 100 in the left and right directions, and finally pass through the two conveying wheels 320 of the second point b at the third point c, arrive at the back side of the third point c, find the head of the front section of the EPDM wire material 100, and complete the straightening. Example

[0047] This embodiment is an improvement on the first embodiment. For details, please refer to Figure 1-Figure 10 The conveying mechanism 300 also includes a mounting seat 340 slidably disposed in the cooling pool 220 .

[0048] The displacement monitoring assembly 330 includes a displacement sensor 331 disposed on a mounting seat 340 . The mounting seat 340 is provided with an arc groove 332 . A slide seat 333 is slidably disposed in the arc groove 332 . The slide seat 333 is elastically connected to the mounting seat 340 via a first spring 334 . The conveying wheel 320 is slidably disposed in the mounting seat 340 .

[0049] In this embodiment: the displacement monitoring assembly 330 can detect the precursor of the broken strip and the occurrence of the broken strip. First, the overall structural mounting seat 340 supporting the conveying mechanism 300 can slide in the cooling pool 220 along the left and right and front and back directions. The two conveying wheels 320 are movably installed, and their positions can be changed according to the stress.

[0050] The arc groove 332 opened on the mounting seat 340 is a shorter arc, and the rear side is closer to the cooling pool 220. Under the normal elastic support of the first spring 334, the slide 333 drives the conveying wheel 320 to be in the rear position of the arc groove 332 in the figure. At this time, the distance between the two conveying wheels 320 is small. When the EPDM wire material 100 passes through, it is pushed to both sides by the EPDM wire material 100, and the slide 333 enters the middle position of the arc groove 332.

[0051] When the diameter becomes thinner due to the precursor of the broken strip or other reasons, the slide 333 will slide to the rear side of the arc groove 332, and will slide to the front side when the diameter becomes thicker. At this time, the movement of the slide 333 can be sensed and monitored by the displacement sensor 331 installed on the mounting seat 340. Example

[0052] This embodiment is an improvement on the second embodiment. For details, please refer to Figure 1-Figure 10The control mechanism 400 includes a first driving assembly 410 and a second driving assembly 420. The first driving assembly 410 includes a driving seat 411 slidably disposed in the cooling pool 220. The driving seat 411 is provided with a first cylinder 412 and a top column 413. The output shaft of the first cylinder 412 is connected to the top column 413.

[0053] Two first insertion rods 414 are disposed on the top column 413 , and two mounting seats 340 in a set of conveying mechanisms 300 are each provided with a first slot 415 , and the two first slots 415 are respectively adapted to the two first insertion rods 414 .

[0054] A first motor 416 is disposed in the cooling pool 220 . A screw rod 417 is disposed on the output shaft of the first motor 416 . The driving seat 411 is threadedly connected to the screw rod 417 .

[0055] A plurality of second driving assemblies 420 are provided, and the plurality of second driving assemblies 420 are respectively connected to a plurality of mounting seats 340 .

[0056] The second driving component 420 includes a first slide groove 421 opened in the cooling pool 220, and a first slider 422 is slidably arranged in the first slide groove 421. The first slider 422 is elastically connected to the inner wall of the first slide groove 421 through a second spring 423, and the first slider 422 is connected to the mounting seat 340 through a connecting component 430.

[0057] A second slide groove 424 is further provided in the cooling pool 220 , and a second sliding block 425 is slidably provided in the second slide groove 424 .

[0058] The second driving assembly 420 further includes a connecting rod 426 , both ends of which are movably hinged to the first slider 422 and the second slider 425 via hinge shafts.

[0059] A second plug rod 427 is disposed on the mounting seat 340 , and a second slot 428 adapted to the second plug rod 427 is formed on the second sliding block 425 .

[0060] The connecting component 430 includes a third slide groove 431 opened on the mounting seat 340, and a third plug rod 432 is slidably arranged in the third slide groove 431. The third plug rod 432 is elastically connected to the inner wall of the third slide groove 431 through a fourth spring 433, and a third slot 434 adapted to the third plug rod 432 is opened on the first slider 422.

[0061] Two first push plates 418 are symmetrically arranged on the top column 413 , and two third insertion rods 432 on a set of mounting seats 340 are each provided with a second push plate 419 , and the two second push plates 419 are respectively adapted to the two first push plates 418 .

[0062] In this embodiment: in the normal state, the position of the mounting seat 340 is inserted into the third slot 434 through the third insertion rod 432 under the elastic support of the fourth spring 433. At this time, the first slider 422 is also in the first slide groove 421 close to the EPDM wire material 100 under the elastic support of the second spring 423, so that the positions of the several conveying wheels 320 are relatively fixed and will not move forward, backward, left or right.

[0063] When the control mechanism 400 controls the movement, first, the first motor 416 controls the screw rod 417 to rotate, driving the driving seat 411 to move forward and backward to the second point b and then stop, and the first cylinder 412 extends to drive the top column 413 to rise, at which time the two first plug rods 414 on the top column 413 will be respectively inserted into the two first slots 415, completing the connection between the driving seat 411 and the mounting seat 340, and at the same time, the two first push plates 418 will rise and push the two second push plates 419, thereby driving the two third plug rods 432 to rise and be pulled out from the two third slots 434, releasing the position fixation of the two mounting seats 340. Then the first motor 416 continues to run, and can drive the two conveying mechanisms 300 to move forward and backward.

[0064] And during the backward movement of the two conveying mechanisms 300 at the second point position b, before reaching the third point position c, the two second insertion rods 427 located on the rear sides of the two mounting seats 340 have already been connected to the two second slots 428 of the two second sliders 425 at the third point position c. At this time, the two mounting seats 340 at the second point position b continue to move backward, which will push the two second sliders 425 at the third point position c to move backward. At this time, the backward movement of the two second sliders 425 at the third point position c will cause the two first sliders 422 at the third point position c to move away to the left and right directions through the transmission of the two connecting rods 426.

[0065] Until the two conveying mechanisms 300 at the second point b pass through the third point c and enter between the third point c and the fourth point d and find the head of the front section of the EPDM wire material 100 and stop moving backward, they will also press against the two conveying mechanisms 300 at the third point c and keep them away.

[0066] When the two conveying mechanisms 300 at the second point position b move forward during the return journey, driven by the two second insertion rods 427 at the second point position b and reset by the two second springs 423 at the third point position c, the two conveying mechanisms 300 at the third point position c are reset after the two conveying mechanisms 300 at the second point position b move forward and pass through the third point position c. Example

[0067] This embodiment is an improvement on the second embodiment. For details, please refer to Figure 1-Figure 10The locking assembly 310 includes a connecting tube 311 disposed on a sliding seat 333 , and two latch teeth 312 are symmetrically disposed in the connecting tube 311 .

[0068] A sliding rod 313 is slidably disposed on the connecting tube 311 . The sliding rod 313 is elastically connected to the connecting tube 311 via a fifth spring 317 . A connecting seat 314 is disposed on each of the two latch teeth 312 .

[0069] The locking assembly 310 also includes two second connecting rods 315, one end of the two second connecting rods 315 is hinged to the sliding rod 313 through a hinge, and the other ends of the two second connecting rods 315 are respectively hinged to two connecting seats 314 through a hinge. A guide groove 316 is opened on the cooling pool 220, and the sliding rod 313 is slidably connected in the guide groove 316.

[0070] In this embodiment, the guide groove 316 presents multiple alternating undulations. When the pair of conveying wheels 320 rotate automatically under the drag of the wire material in situ, the slide bar 313 is at the lower position of the guide groove 316, and the two latching teeth 312 do not contact the conveying wheels 320. When the conveying mechanism 300 moves backward as a whole, the slide bar 313 slides from the lower position to the higher position along the guide groove 316. At this time, the slide bar 313 slides upward under the elastic force of the fifth spring 317 until it hits the top wall of the guide groove 316. At this time, the transmission of the two connecting rods 315 and the two connecting seats 314 will cause the two latching teeth 312 to move in a direction close to each other to clamp the conveying wheel 320 so that it cannot rotate.

[0071] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0072] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A pelletizer for preparing EPDM pellets, comprising a screw extruder (200), a die (210), a cooling tank (220) and a pelletizer (230) connected in sequence, characterized in that: The cooling pool (220) is provided with a plurality of conveying mechanisms (300) and a control mechanism (400); The conveying mechanism (300) comprises two locking components (310) symmetrically arranged on the cooling pool (220), two conveying wheels (320) and two displacement monitoring components (330); After the EPDM strands (100) are generated by the screw extruder (200) and the die (210), the EPDM strands (100) enter between a pair of conveying wheels (320), and after the two conveying wheels (320) are locked by the two locking assemblies (310), the two conveying wheels (320) are driven by the control mechanism (400) to carry the EPDM strands (100) to the pelletizer (230) to prepare EPDM pellets; Then, the control mechanism (400) drives the pair of conveying wheels (320) to reset, and releases the locking of the pair of conveying wheels (320) by the two locking assemblies (310), so that the pair of conveying wheels (320) rotate in opposite directions to continuously convey the EPDM strands (100).

2. A granulator for preparing EPDM particles according to claim 1, characterized in that: The conveying mechanism (300) further comprises a mounting seat (340) slidably disposed in the cooling pool (220); The displacement monitoring assembly (330) comprises a displacement sensor (331) arranged on the mounting seat (340); an arc-shaped groove (332) is formed on the mounting seat (340); a sliding seat (333) is slidably arranged in the arc-shaped groove (332); the sliding seat (333) is elastically connected to the mounting seat (340) via a first spring (334); and the conveying wheel (320) is slidably arranged in the mounting seat (340).

3. A granulator for preparing EPDM particles according to claim 2, characterized in that: The control mechanism (400) comprises a first drive assembly (410) and a second drive assembly (420); the first drive assembly (410) comprises a drive seat (411) slidably disposed in the cooling pool (220); a first cylinder (412) and a top column (413) are disposed on the drive seat (411); an output shaft of the first cylinder (412) is connected to the top column (413).

4. A granulator for preparing EPDM particles according to claim 3, characterized in that: Two first insertion rods (414) are arranged on the top column (413), and two mounting seats (340) in a set of conveying mechanisms (300) are each provided with a first slot (415), and the two first slots (415) are respectively adapted to the two first insertion rods (414); A first motor (416) is arranged in the cooling pool (220), a screw rod (417) is arranged on the output shaft of the first motor (416), and the drive seat (411) is threadedly connected to the screw rod (417).

5. A granulator for preparing EPDM particles according to claim 4, characterized in that: A plurality of the second drive components (420) are provided, and the plurality of the second drive components (420) are respectively connected to a plurality of the mounting seats (340); The second driving component (420) includes a first slide groove (421) opened in the cooling pool (220), a first slider (422) is slidably arranged in the first slide groove (421), the first slider (422) is elastically connected to the inner wall of the first slide groove (421) via a second spring (423), and the first slider (422) is connected to the mounting seat (340) via a connecting component (430).

6. A granulator for preparing EPDM particles according to claim 5, characterized in that: A second slide groove (424) is further provided in the cooling pool (220), and a second sliding block (425) is slidably provided in the second slide groove (424); The second driving assembly (420) further comprises a first connecting rod (426), and two ends of the first connecting rod (426) are respectively movably hinged to the first sliding block (422) and the second sliding block (425) through hinge shafts; The mounting seat (340) is provided with a second insertion rod (427), and the second sliding block (425) is provided with a second slot (428) adapted to the second insertion rod (427).

7. A granulator for preparing EPDM particles according to claim 6, characterized in that: The connecting assembly (430) comprises a third slide groove (431) provided on the mounting seat (340), a third insertion rod (432) being slidably arranged in the third slide groove (431), the third insertion rod (432) being elastically connected to the inner wall of the third slide groove (431) via a fourth spring (433), and a third slot (434) adapted to the third insertion rod (432) being provided on the first sliding block (422); Two first push plates (418) are symmetrically arranged on the top column (413), and two third insertion rods (432) on a set of the mounting seats (340) are each provided with a second push plate (419), and the two second push plates (419) are respectively adapted to the two first push plates (418).

8. A granulator for preparing EPDM particles according to claim 7, characterized in that: The locking assembly (310) comprises a connecting cylinder (311) arranged on the sliding seat (333), and two latching teeth (312) are symmetrically arranged in the connecting cylinder (311); A sliding rod (313) is slidably disposed on the connecting tube (311), the sliding rod (313) is elastically connected to the connecting tube (311) via a fifth spring (317), and a connecting seat (314) is disposed on each of the two latch teeth (312); The locking assembly (310) further comprises two second connecting rods (315), one end of each of the two second connecting rods (315) being movably hinged to the slide rod (313) via a hinge shaft, and the other end of each of the two second connecting rods (315) being movably hinged to the two connecting seats (314) via a hinge shaft, respectively; a guide groove (316) is provided on the cooling pool (220), and the slide rod (313) is slidably connected in the guide groove (316).

9. A granulator for preparing EPDM particles according to claim 8, characterized in that: A cutting mechanism (500) is arranged on the cooling pool (220), and the cutting mechanism (500) comprises a second cylinder (510) arranged on the cooling pool (220), and a cutter (520) is arranged on an output shaft of the second cylinder (510).

10. A granulator for preparing EPDM particles according to claim 9, characterized in that: Two conveying rollers (240) and two second motors (250) are also arranged on the cooling pool (220); the output shafts of the two second motors (250) are respectively connected to the two conveying rollers (240); and the EPDM strands (100) are slidably arranged on the two conveying rollers (240).

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