EVA granulator with circulating water cooling function

Abstract

The invention relates to an EVA granulator with a circulating water cooling function, and relates to a plastic molding process, comprising an extrusion system, a cutting system, a circulating water cooling system, an auxiliary heat dissipation system and a storage bucket connected in sequence, wherein the circulating water cooling system comprises a water cooling support box, a water cooling roller device and an extrusion plate device, wherein a plurality of water cooling grooves are arranged on the surface of the water cooling roller device, and a plurality of auxiliary molding grooves are arranged on a side of the extrusion plate device close to the water cooling roller device, wherein the water cooling grooves and the auxiliary molding grooves are adapted one by one, wherein the upper side of the auxiliary molding groove is wide and the lower side is narrow, and the movement direction of the upper surface of the water cooling groove is from the upper side of the auxiliary molding groove to the lower side of the auxiliary molding groove, and adhesion does not occur while ensuring the heat dissipation efficiency, so that the material is pure.

Description

Technical Field

[0001] The invention relates to the technical field of plastic molding technology, in particular to an EVA granulator with a circulating water cooling function. Background Art

[0002] At present, the common plastic pelletizers on the market are mainly divided into two categories: water-cooled and air-cooled. Water-cooled pelletizers are machines that use water as a coolant to process plastic materials into particles. Air-cooled pelletizers are machines that use wind as a coolant to process plastic materials into particles. These two types of pelletizers have their own advantages and disadvantages, and you can choose to use them according to your actual situation.

[0003] The advantage of water cooling is that it has good heat dissipation performance and can cool equipment and materials at a low temperature in a short time, which is suitable for production environments with high temperature requirements; the advantage of air cooling is that it is easy to maintain and has low cost, which is suitable for different production environments, especially in low temperature environments. However, there is a difficult problem with water cooling, that is, the pellets after production contain water, which is easy to contaminate the pellets. Therefore, when the water content requirement is high, granulation can only be done by air cooling. However, the pellets of existing air-cooled granulators are prone to adhesion due to the limited heat dissipation speed, resulting in granulation failure. Summary of the invention

[0004] In order to overcome the technical defects of the prior art, the present invention provides an EVA granulator with a circulating water cooling function, which does not cause adhesion while ensuring the heat dissipation efficiency, thereby making the material pure.

[0005] The technical solution adopted by the present invention is:

[0006] The EVA granulator with circulating water cooling function comprises an extrusion system, a cutting system, a circulating water cooling system, an auxiliary heat dissipation system and a storage barrel which are connected in sequence. The circulating water cooling system comprises a water-cooling support box, a water-cooling roller device and an extrusion plate device. The water-cooling support box is installed at the bottom of the cutting system. The water-cooling roller device is rotatably installed in the water-cooling support box. The bottom of the water-cooling support box is connected to the auxiliary heat dissipation system. The extrusion plate device is installed in the water-cooling support box. A plurality of water-cooling grooves are provided on the surface of the water-cooling roller device. A plurality of auxiliary forming grooves are provided on the side of the extrusion plate device close to the water-cooling roller device. The water-cooling grooves and the auxiliary forming grooves are matched one by one. The upper side of the auxiliary forming groove is wide and the lower side is narrow. The movement direction of the upper surface of the water-cooling groove is from the upper side of the auxiliary forming groove to the lower side of the auxiliary forming groove.

[0007] Preferably, the extrusion system includes an extrusion main unit, a hopper and a reduction device, the extrusion main unit is transmission-connected to the reduction device, the extrusion main unit has an extrusion port, the cutting system is installed outside the extrusion port, and the cutting path of the cutting system passes through the extrusion port.

[0008] Preferably, the cutting system comprises a cutting motor and a cutting blade, wherein the cutting blade is mounted at an output end of the cutting motor, and a cutting path of the cutting blade passes through an end of the extrusion system.

[0009] Preferably, the auxiliary heat dissipation system includes a centrifugal barrel and a heat dissipation pipe, the two ends of the heat dissipation pipe are respectively connected to the bottom of the circulating water cooling system and the interior of the centrifugal barrel, the heat dissipation pipe is connected to the centrifugal barrel from the tangential direction of the centrifugal barrel, the storage barrel is located at the bottom of the centrifugal barrel, and a main negative pressure fan is installed on the top of the centrifugal barrel.

[0010] Preferably, the water-cooled roller device includes a water-cooled rotating body and a swivel joint, the water-cooled rotating body is rotatably installed in a water-cooled support box, the swivel joint is connected to the water-cooled rotating body, and the water-cooling groove is opened on the outer surface of the water-cooled rotating body.

[0011] Preferably, the extrusion plate device includes an adsorption air pipe and an auxiliary extrusion plate, the auxiliary extrusion plate is fitted with a water-cooled roller device, the auxiliary forming groove is opened on the side of the auxiliary extrusion plate close to the water-cooled roller device, the auxiliary extrusion plate is provided with a plurality of through air guide holes, each of the air guide holes is connected to the auxiliary forming groove, the adsorption air pipe is connected to the side of each air guide hole away from the water-cooled roller device, and an auxiliary negative pressure fan is provided at the end of the adsorption air pipe.

[0012] Preferably, the diameter of the air guide hole is 0.4 to 0.7 times the width of the water cooling groove.

[0013] Preferably, the upper ends of the auxiliary forming grooves are each provided with an auxiliary rolling protrusion, and each of the auxiliary rolling protrusions is in the shape of an arc plate.

[0014] The beneficial effects of the present invention are:

[0015] The hot particles cut by the cutting system and still in a molten state fall directly into the water-cooled roller device. At this time, these particles will indeed stick to the water-cooled roller device, so it is necessary to set an extrusion plate device and a water-cooled roller device to cooperate with each other. Since the extrusion plate device and the water-cooled roller device are offset from each other, the molten particles are quickly carried away to avoid accumulation and adhesion. The circulating water cooling system includes a water-cooled support box, a water-cooled roller device and an extrusion plate device. The water-cooled support box is installed at the bottom of the cutting system, and the water-cooled roller device is rotatably installed in the water-cooled support box. The bottom of the water-cooled support box is connected to the auxiliary heat dissipation system, and the extrusion plate device is installed in the water-cooled support box. The surface of the water-cooled roller device is provided with a plurality of water-cooling grooves. A plurality of auxiliary forming grooves are provided on one side of the extrusion plate device close to the water-cooling roller device. The water-cooling grooves and the auxiliary forming grooves are matched one by one. When the molten particles fall onto the water-cooling roller device, the heat will be quickly carried away by the water-cooling roller device, so that the molten particles are quickly cooled down. Then the water-cooling roller device carries the particles being cooled down to roll on the auxiliary forming grooves. The upper side of the auxiliary forming groove is wide and the lower side is narrow. The movement direction of the upper surface of the water-cooling groove is from the upper side of the auxiliary forming groove to the lower side of the auxiliary forming groove. The upper side of the auxiliary forming groove is wide, which is convenient for the particles to enter. The lower side of the auxiliary forming groove is narrow, which is convenient for forming. No adhesion occurs while ensuring the heat dissipation efficiency, so that the material is pure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the installation relationship between the water-cooled roller device and the auxiliary extrusion plate.

[0018] Figure 3 Schematic diagram of the installation relationship between the water-cooled roller device and the extrusion plate device.

[0019] Figure 4 This is a schematic diagram of the posture and structure of the circulating water cooling system during installation.

[0020] Figure 5 Schematic diagram of the auxiliary extrusion plate structure.

[0021] Figure 6 Schematic diagram of particles flowing out of the circulating water cooling system.

[0022] Figure 7 Schematic diagram of particles flowing into the circulating water cooling system.

[0023] Figure 8 for Figure 6 Enlarged schematic diagram at point A in the middle.

[0024] Fig. 9 for Figure 7 Enlarged schematic diagram of point B in the middle.

[0025] Description of reference numerals:

[0026] 1. Extrusion system; 11. Extrusion machine; 12. Hopper; 13. Speed ​​reducer;

[0027] 2. Cutting system;

[0028] 3. Circulating water cooling system; 31. Water cooling support box; 32. Water cooling roller device; 321. Water cooling rotating body; 3211. Water cooling tank; 322. Rotary joint; 33. Extrusion plate device; 331. Auxiliary forming tank; 332. Auxiliary extrusion plate; 333. Adsorption air pipe; 334. Auxiliary negative pressure fan; 335. Auxiliary rolling protrusion; 336. Air guide hole;

[0029] 4. Auxiliary heat dissipation system; 41. Centrifugal barrel; 42. Heat dissipation pipe;

[0030] 5. Storage bin. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings:

[0032] like Figure 1 —— Fig. 9As shown, this embodiment provides an EVA granulator with a circulating water cooling function, including an extrusion system 1, a cutting system 2, a circulating water cooling system 3, an auxiliary heat dissipation system 4 and a storage barrel 5 connected in sequence, the circulating water cooling system 3 includes a water cooling support box 31, a water cooling roller device 32 and an extrusion plate device 33, the water cooling support box 31 is installed at the bottom of the cutting system 2, the water cooling roller device 32 is rotatably installed in the water cooling support box 31, the bottom of the water cooling support box 31 is connected to the auxiliary heat dissipation system 4, the extrusion plate device 33 is installed in the water cooling support box 31, and the hot water cut by the cutting system 2 is returned to the storage barrel 5. The particles in the molten state directly fall into the water-cooled roller device 32. At this time, these particles will indeed temporarily stick to the water-cooled roller device 32. As the particles on the water-cooled roller device 32 are gradually cooled, the contact position between the particles and the water-cooled roller device 32 hardens and becomes easy to separate. Therefore, it is necessary to set an extrusion plate device 33 and the water-cooled roller device 32 to cooperate with each other. Under the action of the extrusion plate device 33, the particles on the water-cooled roller device 32 are peeled off and carried away. Since the water-cooled roller device 32 carries the molten particles away in time, the possibility of the particles contacting and sticking together is completely avoided, ensuring The extrusion plate device 33 and the water-cooled roller device 32 are mutually offset to quickly carry away the molten particles to avoid accumulation and adhesion. Please note that when the particles fall on the water-cooled roller device 32 and move toward the extrusion plate device 33, they are not only quickly cooled by the water-cooled roller device 32, but also cooled by the air flow blowing through, forming a double channel for heat dissipation. The surface of the water-cooled roller device 32 is provided with a plurality of water-cooled grooves 3211, and the side of the extrusion plate device 33 close to the water-cooled roller device 32 is provided with a plurality of auxiliary molding grooves 331. The water-cooled grooves 3211 and the auxiliary molding grooves 331 are provided with a plurality of auxiliary molding grooves 332. 31 are adapted one-to-one. When the molten particles fall onto the water-cooled roller device 32, the heat will be quickly carried away by the water-cooled roller device 32, so that the surface of the molten particles is quickly cooled down. Then the water-cooled roller device 32 carries the particles being cooled down to roll on the auxiliary molding groove 331. The upper side of the auxiliary molding groove 331 is wide and the lower side is narrow. The movement direction of the upper surface of the water-cooled groove 3211 is from the upper side of the auxiliary molding groove 331 to the lower side of the auxiliary molding groove 331. The upper side of the auxiliary molding groove 331 is wide, which is convenient for particles to enter, and the lower side of the auxiliary molding groove 331 is narrow and convenient for molding.

[0033] The heat dissipation paths of the particles are:

[0034] 1. The hot and molten particles cut by the cutting system 2 are only cooled by air before falling onto the water-cooled roller device 32;

[0035] 2. After the particles fall onto the surface of the water-cooling roller device 32, they are placed on the water-cooling groove 3211 and are cooled by both the water-cooling groove 3211 and the air flow;

[0036] 3. The upper sides of the auxiliary molding grooves 331 are closely arranged without any gaps. Since the upper sides of the auxiliary molding grooves 331 are wide, the particles will enter between the water cooling grooves 3211 and the auxiliary molding grooves 331 in a relatively loose state and will be gradually plasticized. At this time, the particles are triple cooled by the water cooling grooves 3211, the auxiliary molding grooves 331 and the air flow.

[0037] 4. The particles fall from the water-cooled roller device 32 and are sucked into the auxiliary cooling system 4 to continue being cooled by air.

[0038] Since the material does not come into contact with water during the entire process, the purity of the material is guaranteed.

[0039] Specifically, the extrusion system 1 includes an extrusion host 11, a hopper 12 and a reduction device 13. The extrusion host 11 is transmission-connected to the reduction device 13. The reduction device 13 is externally connected to an extrusion motor. The extrusion host 11 has an extrusion port. The cutting system 2 is installed outside the extrusion port. The cutting path of the cutting system 2 passes through the extrusion port. The extrusion host 11 melts and extrude the raw materials falling from the hopper 12 from the extrusion port, and then the cutting system 2 cuts them into particles.

[0040] Specifically, the cutting system 2 includes a cutting motor and a cutting blade. The cutting blade is installed at the output end of the cutting motor, and the cutting path of the cutting blade passes through the end of the extrusion system 1. The cutting blade cuts the molten material into particles when it intermittently sweeps across the extrusion port. In order to prevent the particles from splashing, the cutting system 2 also includes a cutting shell. The output end of the cutting motor extends into the cutting shell. The upper end of the cutting shell is connected to the extrusion port, and the lower end of the cutting shell is connected to the top of the water-cooled support box 31. The cutting blade directly cuts the material extruded from the extrusion port of the extrusion system 1 into particles. The extrusion port is round-headed to prevent the cutting blade from hitting the knife. This is a prior art and will not be described in detail here.

[0041] Specifically, the auxiliary heat dissipation system 4 includes a centrifugal barrel 41 and a heat dissipation pipe 42. The two ends of the heat dissipation pipe 42 are respectively connected to the bottom of the circulating water cooling system 3 and the interior of the centrifugal barrel 41. The heat dissipation pipe 42 is connected to the centrifugal barrel 41 from the tangential direction of the centrifugal barrel 41. The storage barrel 5 is located at the bottom of the centrifugal barrel 41. A main negative pressure fan is installed on the top of the centrifugal barrel 41. The main negative pressure fan generates negative pressure to suck particles falling from the bottom of the circulating water cooling system 3 into the centrifugal barrel 41 along the heat dissipation pipe 42. The particles continue to dissipate heat and cool down through air in the heat dissipation pipe 42 until they fall into the storage barrel 5 after the heat dissipation is completed.

[0042] Specifically, the water-cooled roller device 32 includes a water-cooled rotating body 321 and a rotating joint 322. The water-cooled rotating body 321 is rotatably installed in the water-cooled support box 31. The rotating joint 322 is connected to a chiller. The rotating joint 322 is connected to the water-cooled rotating body 321. The water-cooling groove 3211 is opened on the outer surface of the water-cooled rotating body 321. The rotating joint 322 is used to continuously provide cold water to the water-cooled rotating body 321 to transport the heat of the water-cooled rotating body 321 away.

[0043] Specifically, the extrusion plate device 33 includes an adsorption air pipe 333 and an auxiliary extrusion plate 332. The auxiliary extrusion plate 332 is installed in the water-cooled support box 31. The auxiliary extrusion plate 332 is fitted with the water-cooled roller device 32. Please note that the fitting here refers to the fitting of the contour. In fact, there is no actual contact between the auxiliary extrusion plate 332 and the water-cooled rotating body 321, but a spacing of 1 mm to 3 mm is left. This spacing is to prevent the particles from being squeezed, broken and disintegrated during the transportation process. When the particles are just cut by the cutting blade, they are not regular. After entering between the water-cooled groove 3211 and the auxiliary molding groove 331 in a relatively loose state, due to the gradual narrowing of the auxiliary molding groove 331, the auxiliary molding groove 331 gradually drives the particles to roll on the water-cooled groove 3211, and then The particles are closer to a spherical shape, and in the process of the particles being closer to a spherical shape, the particles transfer heat to the water-cooling groove 3211 and the auxiliary forming groove 331 at the same time, which greatly improves the cooling speed. The auxiliary forming groove 331 is opened on the side of the auxiliary extrusion plate 332 close to the water-cooling roller device 32. The auxiliary extrusion plate 332 is provided with a plurality of through air guide holes 336, each air guide hole 336 is connected to the auxiliary forming groove 331, and the adsorption air pipe 333 is connected to the side of each air guide hole 336 away from the water-cooling roller device 32. An auxiliary negative pressure fan 334 is provided at the end of the adsorption air pipe 333. The function of the auxiliary negative pressure fan 334 is to pass the airflow through the air guide holes 336 and then dissipate the heat of the auxiliary extrusion plate 332. The auxiliary forming groove 331 and the water-cooling groove 3211 cooperate with each other to enable the particles to be formed.

[0044] Specifically, the diameter of the air guide hole 336 is 0.4 to 0.7 times the width of the water cooling groove 3211 to prevent particles from clogging the air guide hole 336 .

[0045] Specifically, the upper end of the auxiliary forming groove 331 is provided with an auxiliary rolling protrusion 335, and each auxiliary rolling protrusion 335 is in the shape of an arc plate, which is used to move the particles adhered to the water cooling groove 3211, advance the time when the particles roll in the water cooling groove 3211, and improve the heat dissipation efficiency.

[0046] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. EVA granulator with circulating water cooling function, characterized in that: It includes an extrusion system, a cutting system, a circulating water cooling system, an auxiliary heat dissipation system and a storage bucket connected in sequence, the circulating water cooling system includes a water-cooling support box, a water-cooling roller device and an extrusion plate device, the water-cooling support box is installed at the bottom of the cutting system, the water-cooling roller device is rotatably installed in the water-cooling support box, the bottom of the water-cooling support box is connected to the auxiliary heat dissipation system, the extrusion plate device is installed in the water-cooling support box, a plurality of water-cooling grooves are provided on the surface of the water-cooling roller device, a plurality of auxiliary forming grooves are provided on the side of the extrusion plate device close to the water-cooling roller device, the water-cooling grooves and the auxiliary forming grooves are adapted one by one, the upper side of the auxiliary forming grooves is wide and the lower side is narrow, and the upper surface of the water-cooling grooves is The movement direction of the surface is from the upper side of the auxiliary forming groove to the lower side of the auxiliary forming groove. The extrusion plate device includes an adsorption air pipe and an auxiliary extrusion plate. The auxiliary extrusion plate is fitted with a water-cooled roller device. The auxiliary forming groove is opened on the side of the auxiliary extrusion plate close to the water-cooled roller device. The auxiliary extrusion plate is provided with a plurality of through air guide holes, each of which is connected to the auxiliary forming groove. The adsorption air pipe is connected to the side of each air guide hole away from the water-cooled roller device. An auxiliary negative pressure fan is provided at the end of the adsorption air pipe. The diameter of the air guide hole is 0.4 to 0.7 times the width of the water-cooled groove. Auxiliary rolling protrusions are provided at the upper ends of the auxiliary forming grooves, and each of the auxiliary rolling protrusions is in the shape of an arc plate.

2. The EVA granulator with circulating water cooling function according to claim 1, characterized in that: The extrusion system comprises an extrusion mainframe, a hopper and a reduction device, wherein the extrusion mainframe is transmission-connected to the reduction device, the extrusion mainframe has an extrusion port, the cutting system is installed outside the extrusion port, and the cutting path of the cutting system passes through the extrusion port.

3. The EVA granulator with circulating water cooling function according to claim 1, characterized in that: The cutting system comprises a cutting motor and a cutting blade, wherein the cutting blade is mounted at the output end of the cutting motor, and a cutting path of the cutting blade passes through the end of the extrusion system.

4. The EVA granulator with circulating water cooling function according to claim 1, characterized in that: The auxiliary heat dissipation system includes a centrifugal barrel and a heat dissipation pipe, the two ends of the heat dissipation pipe are respectively connected to the bottom of the circulating water cooling system and the interior of the centrifugal barrel, the heat dissipation pipe is connected to the centrifugal barrel from the tangent direction of the centrifugal barrel, the storage barrel is located at the bottom of the centrifugal barrel, and a main negative pressure fan is installed on the top of the centrifugal barrel.

5. The EVA granulator with circulating water cooling function according to claim 1, characterized in that: The water-cooled roller device includes a water-cooled rotating body and a rotating joint. The water-cooled rotating body is rotatably installed in a water-cooled support box. The rotating joint is connected to the water-cooled rotating body. The water-cooling groove is arranged on the outer surface of the water-cooled rotating body.

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