Pelletizing device

Abstract

A kind of colloidal particle cutting device, it includes a cutter head and a die head, the cutter head includes several blades, each blade has a pair of surfaces, a pair of first bevel and a pair of second bevel, and the first bevel is formed with the adjacent surface a first angle, and the second bevel is formed with the opposite surface a second angle, the side of the die head is provided with several die pieces, the first bevel of several blades can be respectively abutted on several die pieces, each die piece includes a body, a front end contact part and a rear end contact part, the front end contact part is arranged on the upper side of one end of the body, the rear end contact part is arranged on the lower side of the other end of the body, and the front end contact part of each die piece is adjacent to the rear end contact part of its adjacent die piece.The first bevel of several blades is abutted on several die pieces, so there is a larger contact area between several die pieces, and the stress can be dispersed to avoid blade angle defect, so as to increase the service life.

Description

Technical Field

[0001] This utility model relates to a pelletizing device, and in particular to a rubber pelletizing device. Background Technology

[0002] A known granulator has several storage tanks connected to a metering mixer. The metering mixer is connected to a die head, which is connected to a cooling device and several blades. This allows several raw materials to be stored separately in the storage tanks and simultaneously fed into the metering mixer to be mixed into a liquid thermoplastic material. The thermoplastic material is then extruded in strip form through the die head to the cooling device. The blades closely adhere to the die head and cut the thermoplastic material into granules by rotation. After cooling, the finished granules are obtained. These granules can then be packaged and sent downstream to be manufactured into various products.

[0003] However, the known blades are attached to the die head with their sharp tips, resulting in a small contact area and concentrated force at the tips. After long-term use, the blades or die head will wear down, making the finished granules contain metal impurities and become waste. Therefore, it is necessary to replace or dispose of worn blades or die heads regularly. After observing the above-mentioned shortcomings, the inventor of this invention believed that there was a need to improve the existing granule cutting device, which led to the creation of this utility model. Utility Model Content

[0004] The purpose of this invention is to provide a pellet cutting device that can distribute the force on the blade to avoid blade chipping.

[0005] To achieve the above objectives, the present invention provides a pelletizing device for rubber granulation, which is installed in a rubber granulator. The pelletizing device includes: a cutting head connected to a rotating shaft and comprising several blades, each blade having a pair of surfaces and a pair of side surfaces respectively connected to the surfaces; each side surface including a first inclined surface and a second inclined surface connected to each other; each first inclined surface connecting to one end of each surface, and the other end of each surface connecting to each second inclined surface; the first inclined surface forming a first angle with the adjacent surface, and the second inclined surface forming a second angle with the opposite surface; and a die head, one side of which is provided with several... The mold pieces have their first inclined surfaces abutting against each other. The mold pieces are spaced apart along the circumferential direction. Each mold piece includes a body, a front contact portion, a rear contact portion, and several discharge holes. The front contact portion is located on the upper side of one end of the body, and the rear contact portion is located on the lower side of the other end of the body. The front contact portion of each mold piece is adjacent to the rear contact portion of its neighboring mold piece. The discharge holes are located on the mold piece, and an intermediate layer is provided between each mold piece and its neighboring mold pieces.

[0006] As a preferred option, the first angle is between 35 degrees and 70 degrees.

[0007] As a preferred embodiment, the second angle is between 15 degrees and 42 degrees.

[0008] As a preferred embodiment, the width of the plurality of blades is slightly greater than the length of the front contact portion.

[0009] As a preferred embodiment, the width of the plurality of blades is less than the length of the body.

[0010] As a preferred embodiment, the plurality of blades are roughly parallelepipeds, and the pairs of surfaces are parallel to each other.

[0011] The pellet cutting device provided by this utility model has several first inclined surfaces that abut against several mold pieces, thus having a large contact area with the mold pieces, which can distribute the force on the blade to avoid blade chipping and thereby increase the durability of use. Attached Figure Description

[0012] Figure 1 This is a partial cross-sectional view of a preferred embodiment of the present invention.

[0013] Figure 2 This is a cross-sectional view of the blade of a preferred embodiment of the present invention.

[0014] Figure 3 This is a perspective view of the mold head according to a preferred embodiment of the present invention.

[0015] Figure 4 This is a bottom view of the mold head according to a preferred embodiment of the present invention.

[0016] Figure 5 This utility model Figure 1 A sectional view along section line 5-5.

[0017] Figure 6 This is a schematic diagram illustrating the use of a preferred embodiment of the present invention.

[0018] Explanation of symbols in the attached diagram: 100 pellet cutting device; 10 blades; 11. Rotary machine shaft; 12. Blade; 13. Surface; 14. Side; 15 first bevel; 16 second bevel; 20 mold heads; 21. Feed inlet; 22. Bottom surface; 23. Discharge port; 24. Die plate; 25 Body; 26 Front contact section; 27 Rear end contact section; 28 Discharge port; 29. Intermediate layer; 200 granulator; 201 cooling device; 202 Cooling channel; 203 Chamber; θ1 is the first angle; θ2 is the second angle; L1 width; L2 length; L3 length. Detailed Implementation

[0019] Please see Figure 1 The figure shown is a partial cross-sectional view of a preferred embodiment of the present invention, which reveals a pelletizing device 100 disposed in a pelletizing machine 200. The pelletizing machine 200 includes a cooling device 201, which may be an air-cooled cooling device or a water-cooled cooling device, etc., and includes a cooling channel 202.

[0020] The pellet cutting device 100 includes a cutting head 10 and a die head 20 and is disposed in the chamber 203 of the cooling channel 202.

[0021] The cutter head 10 is connected to a rotating shaft 11 and contains several blades 12. Please refer to the accompanying documentation. Figure 2 As shown, the plurality of blades 12 are roughly parallelepipeds. Each blade 12 has a pair of surfaces 13 and a pair of side surfaces 14. The pairs of surfaces 13 are parallel to each other, and the pairs of side surfaces 14 are respectively connected to the pairs of surfaces 13. Each side surface 14 includes a first inclined surface 15 and a second inclined surface 16 connected to each other. Each first inclined surface 15 is connected to one end of each surface 13, and the other end of each surface 13 is connected to each second inclined surface 16. The first inclined surface 15 forms a first angle θ1 with the adjacent surface 13. The first angle θ1 is preferably between 35 degrees and 70 degrees, and more preferably between 35 degrees and 45 degrees. The second inclined surface 16 forms a second angle θ2 with the opposite surface 13. The second angle θ2 is between 15 degrees and 42 degrees.

[0022] This mold head is 20; please refer to the accompanying documentation. Figure 3 and Figure 4The die head 20 has several inlet ports 21 on one side and a bottom surface 22, several outlet ports 23, and several die plates 24 on the other side. The die plates 24 are disposed on the bottom surface 22 of the die head 20 and spaced apart along the circumference. Each die plate 24 is made of a first material. Each die plate 24 includes a body 25, a front contact portion 26, a rear contact portion 27, and several outlet holes 28. The front contact portion 26 is located on the upper side of one end of the body 25, and the rear contact portion 27 is located on the lower side of the other end of the body 25. In this embodiment, the bottom surface 22 is circular and has a center point. The distance between the front contact portion 26 and the center point is greater than the distance between the rear contact portion 27 and the center point. The front contact portion 26 contacts the rear contact portion 27. The parts 27 are arranged opposite to each other. The front contact part 26 of each mold piece 24 is adjacent to the rear contact part 27 of its adjacent mold piece 24. The front contact part 26 and the rear contact part 27 of each mold piece 24 form an arc curve. The body 25 of each mold piece 24 and the front contact part 26 form an S-shaped curve. The body 25 of each mold piece 24 and the rear contact part 27 also form an S-shaped curve. The plurality of discharge holes 28 are provided on the mold piece 24. The discharge holes 28 are arranged at equal intervals and are connected to the discharge port 23. The number of discharge holes 28 is preferably 1-5. In this embodiment, there are 3. In addition, an intermediate layer 29 is provided between each mold piece 24 and its adjacent mold piece 24. It is made of a second material. The hardness of the first material is greater than that of the second material. In this embodiment of the utility model, the first material is a hard and wear-resistant tungsten steel sheet or ceramic, and the second material is a softer copper. The first material is fixed to the bottom surface 22 by welding using the second material.

[0023] It is worth mentioning that you should refer to Figure 5 and Figure 6 As shown, the first inclined surface 15 of the blade 12 of the pellet cutting device 100 can respectively abut against the positions of the plurality of mold pieces 24 near the plurality of discharge holes 28, and the width L1 of the plurality of blades 12 is slightly larger than the length L2 of the front contact portion 26 and smaller than the length L3 of the body 25.

[0024] Please continue reading. Figure 1 , Figure 5 as well as Figure 6As shown, when using the granulator 200, a thermoplastic material is first fed into the feed port 21 of the die head 20 through a pipeline, and then conveyed through the discharge port 23 to the discharge holes 28 of the several die plates 24 to be extruded into the cooling channel 202. At this time, the cooling device 201 will cool and shape the thermoplastic material. When the rotating shaft 11 drives the several blades 12 to rotate, the thermoplastic material can be cut into granules. After collecting the granules, the granulation process is completed.

[0025] It is worth mentioning that, compared with the previous technology where the blade 12 is attached to the mold head 20 with a sharp end, in this invention, the blades 12 are obliquely arranged at a first angle θ1, so that the first oblique surfaces 15 abut against the mold pieces 24. The first oblique surfaces 15 are flat, so there is a larger contact area between them and the mold pieces 24, which can distribute the force to avoid the blades 12 from chipping or wearing the mold pieces 24, thereby increasing the durability.

[0026] It is worth mentioning that each side 14 of the blades 12 can abut against the mold pieces 24, achieving a double-sided use effect, thereby increasing the usage time and reducing the replacement frequency.

[0027] It is worth mentioning that the front contact portion 26 of each mold piece 24 is arranged adjacent to the rear contact portion 27 of its adjacent mold piece 24, and the width L1 of the plurality of blades 12 is slightly larger than the length L2 of the front contact portion 26, so that the plurality of blades 12 can simultaneously press against a large part of the front contact portion 26 of one of the mold pieces 24 and a small part of the rear contact portion 27 of its adjacent mold piece 24, so that each blade 12 can continuously press against at least one mold piece 24 without producing a break during the cutting process. In this way, in addition to reducing the wear of the plurality of blades 12, the plurality of mold pieces 24 and the intermediate layer 29, the particles after cutting are also more complete, thereby reducing the generation of excess waste.

Claims

1. A pelletizing device for rubber granulators, which is installed in a rubber granulator, characterized in that, The pelletizing device includes: A cutting head is connected to a rotating shaft and includes several blades. Each blade has a pair of surfaces and a pair of side surfaces, which are respectively connected to the pair of surfaces. Each side surface includes a first inclined surface and a second inclined surface that are connected to each other. Each first inclined surface is connected to one end of each surface, and the other end of each surface is connected to each second inclined surface. The first inclined surface forms a first angle with the adjacent surface, and the second inclined surface forms a second angle with the opposite surface. A die head has several die pieces on one side. The first inclined surfaces of several blades abut against the die pieces. The die pieces are spaced apart along the circumferential direction. Each die piece includes a body, a front contact portion, a rear contact portion, and several discharge holes. The front contact portion is located on the upper side of one end of the body, and the rear contact portion is located on the lower side of the other end of the body. The front contact portion of each die piece is adjacent to the rear contact portion of the adjacent die piece. The discharge holes are located on the die piece, and an intermediate layer is provided between each die piece and its adjacent die pieces.

2. The pelletizing device according to claim 1, characterized in that, The first angle is between 35 and 70 degrees.

3. The pelletizing device according to claim 1, characterized in that, The second angle is between 15 and 42 degrees.

4. The pelletizing device according to claim 1, characterized in that, The width of each blade is slightly greater than the length of the front contact portion.

5. The pelletizing device according to claim 1, characterized in that, The width of each blade is less than the length of the body.

6. The pelletizing device according to claim 1, characterized in that, The blades are parallelepipeds, and the surfaces are parallel to each other.

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