Plastic particle processing equipment for plastic production

Abstract

The invention relates to the technical field of plastic granulation, and discloses plastic particle processing equipment for plastic production, which comprises a driving box body, the granulation part is located in a cavity defined by the driving box body, the granulation part comprises an upper cutting cylinder and a lower cutting cylinder, the upper cutting cylinder is located over the lower cutting cylinder, and the outer end of the upper cutting cylinder and the outer end of the lower cutting cylinder are rotationally connected with the interior of the driving box body; the upper cutting cylinder is detachably provided with a transverse cutter through a locking piece fixedly connected to the outer surface of the circumference of the upper cutting cylinder. The plastic particle processing equipment for plastic production can effectively solve the problems that in the prior art, a plastic granulator generally only uses one or two groups of blades, which is a relatively common configuration, as time goes on and is continuously used, a single group of blades or two groups of blades are in continuous contact and friction with a plastic material, abrasion is naturally caused, and the production efficiency is high. Therefore, the problems of non-uniform particle size and irregular shape are solved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic granulation, and in particular to plastic granule processing equipment used in plastic production. Background Art

[0002] Plastic granules are an important raw material in plastic production, mainly used in injection molding, extrusion, blow molding and other molding processes. Large pieces of waste plastic or unqualified plastic products are crushed by crushers to reduce the particle size. The crushed plastic granules contain a certain amount of moisture and need to be dried by drying equipment to meet the moisture content requirements in the production process. The dried plastic granules are mixed evenly with other additives to improve the performance of plastic products. The mixed raw materials are sent to the granulator and made into plastic granules of a certain shape and size through high-temperature melting, extrusion, cooling, cutting and other processes.

[0003] In the plastic granulation process, the granulator generally uses only one set of blades or two sets of blades, which is a more common configuration. Over time and continuous use, the single set of blades or two sets of blades are constantly in contact and friction with the plastic material, which will naturally cause wear and tear, resulting in uneven particle size and irregular shape. Summary of the invention

[0004] Technical issues solved In view of the above-mentioned shortcomings of the prior art, the present invention provides a plastic particle processing equipment for plastic production, which can effectively solve the problem that in the prior art, plastic granulators generally only use one set of blades or two sets of blades, which is a relatively common configuration. With the passage of time and continuous use, the single set of blades or the two sets of blades are in constant contact and friction with the plastic material, which will naturally cause wear and lead to uneven particle size and irregular shape. Technical Solution

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a plastic particle processing equipment for plastic production, comprising: Drive box body; A granulation part, the granulation part is located in the cavity surrounded by the driving box body, the granulation part comprises an upper cutting cylinder and a lower cutting cylinder, and the upper cutting cylinder is located directly above the lower cutting cylinder, and the outer ends of the upper cutting cylinder and the lower cutting cylinder are both rotatably connected to the inside of the driving box body; Wherein, the upper cutting cylinder is detachably mounted with a cross-cutting knife through a locking piece fixedly connected to the outer surface of its circumference; The interior of the cross-cutting knife is provided with a plurality of component cuts, and the outer circumferential surface of the lower cutting cylinder is sleeved with a longitudinal cutting knife close to the inner wall of the component cuts.

[0006] Furthermore, a blanking plate close to the outer surface of the circumference of the lower cutting cylinder is installed at the outlet end of the driving box body, and a groove close to the outer surface of the longitudinal cutting knife is opened on the side of the blanking plate close to the lower cutting cylinder.

[0007] Furthermore, the locking member comprises a mounting plate, a side of the mounting plate is fixedly connected to the circumferential outer surface of the upper cutting cylinder, a clamping groove is provided on a side of the mounting plate away from the upper cutting cylinder, and a cavity is formed between adjacent mounting plates.

[0008] Furthermore, the cross-cutter is fixedly connected to a locking plate that fits with the inner wall of the locking groove near one side of the upper cutting cylinder, an elliptical groove is provided on the end face of the cross-cutter, a positioning rod is rotatably connected inside the cross-cutter, the outer end of the positioning rod passes through the elliptical groove and is fixedly connected to a U-shaped wheel, and the thickness of the U-shaped wheel is less than the depth of the elliptical groove.

[0009] Furthermore, a square hole and an elliptical hole are respectively opened inside the mounting plate, the square hole and the elliptical hole are connected, the square hole is located directly above the elliptical hole, the inner diameter of the elliptical hole is consistent with the inner diameter of the elliptical groove, and the U-shaped wheel is located outside the mounting plate.

[0010] Furthermore, a protrusion is fixedly connected to the end surface of the mounting plate, and the protrusion is connected to a frame plate that fits and slides with the end surface of the mounting plate through a strong spring arranged on the outer surface of the protrusion.

[0011] Furthermore, in the initial state, the U-shaped wheel is located in the space surrounded by the frame plate, and the inner wall of the frame plate is fixedly connected with a U-shaped ring that fits in the groove of the U-shaped wheel.

[0012] Furthermore, a semicircular block sliding against the inner wall of the square hole is fitted on the circumferential outer surface of the positioning rod, and a spring plate fitting against the top of the inner wall of the square hole is arranged on the upper surface of the semicircular block. Beneficial Effects

[0013] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention is provided with an upper cutting cylinder, a lower cutting cylinder, a cross-cutting knife and a longitudinal cutting knife. When the material passes between the upper cutting cylinder and the lower cutting cylinder, the upper cutting cylinder is detachably provided with a cross-cutting knife through a locking piece fixedly connected to the outer surface of the circumference of the upper cutting cylinder. Several groups of cross-cutting knives are equally spaced and do not interfere with each other. A cavity is formed between adjacent mounting plates for receiving "cross-cutting materials" cut by the cross-cutting knives. At the same time, a notch close to the outer surface of the longitudinal cutting knife is provided on the side of the unloading plate close to the lower cutting cylinder. Therefore, the material passing between the upper cutting cylinder and the lower cutting cylinder can be bidirectionally cut by the cross-cutting knife and the longitudinal cutting knife synchronously. The cross-cutting knife and the longitudinal cutting knife are provided with several groups. Compared with the traditional method of using only one group of blades or two groups of blades (a single group of blades or two groups of blades are in constant contact and friction with the plastic material, which naturally causes wear), the blade replacement cycle of the equipment is greatly reduced. The "circular rotation" cutting method of the two greatly improves the plastic granulation rate. The processing method of the two is not only suitable for granulation of long strip materials, but also suitable for granulation of wide strip materials. It has wide versatility and stable and consistent particle size. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of a blanking plate, an upper cutting cylinder and a lower cutting cylinder according to an embodiment of the present invention; Figure 3 For the embodiment of the present invention Figure 2 A schematic diagram of the structure with a partial enlargement at the center; Figure 4 It is a structural schematic diagram of a granulation part in a front view according to an embodiment of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the upper cutting cylinder, the locking member and the cross-cutting knife in an embodiment of the present invention; Figure 6 It is a structural schematic diagram of a three-dimensional partial cross-section of a locking member according to an embodiment of the present invention; Figure 7 It is a schematic structural diagram of the three-dimensional separation of the locking member and the cross-cutting knife in an embodiment of the present invention.

[0016] The numbers in the figure represent: 1. driving box body; 11. unloading plate; 2. granulating part; 21. upper cutting cylinder; 22. lower cutting cylinder; 23. locking piece; 231. mounting plate; 232. engaging groove; 233. square hole; 234. elliptical hole; 235. protrusion; 236. strong spring; 237. frame plate; 238. U-shaped ring; 24. cross-cutting knife; 241. dividing incision; 242. engaging plate; 243. elliptical groove; 244. positioning rod; 245. U-shaped wheel; 246. semicircular block; 247. spring plate; 25. longitudinal cutting knife. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0018] The present invention will be further described below in conjunction with the embodiments. Example

[0019] See also Figure 1-Figure 7 The present invention provides a technical solution: a plastic particle processing equipment for plastic production, comprising: Drive box body 1; Granulating part 2, granulating part 2 is located in the cavity surrounded by driving box body 1, granulating part 2 comprises upper cutting cylinder 21 and lower cutting cylinder 22, and the upper cutting cylinder 21 is located directly above the lower cutting cylinder 22, and the outer ends of the upper cutting cylinder 21 and the lower cutting cylinder 22 are both rotatably connected to the inside of driving box body 1; The upper cutting cylinder 21 is detachably mounted with a cross-cutting knife 24 via a locking piece 23 fixedly connected to the outer surface of the circumference thereof; The cross-cutting knife 24 has a plurality of component cuts 241 formed inside, and the outer circumferential surface of the lower cutting cylinder 22 is sleeved with a longitudinal cutting knife 25 close to the inner wall of the component cuts 241 .

[0020] The outlet end of the driving box body 1 is provided with a blanking plate 11 close to the outer surface of the circumference of the lower cutting cylinder 22 for guiding the plastic particles to fall. A notch close to the outer surface of the longitudinal cutting knife 25 is provided on the side of the blanking plate 11 close to the lower cutting cylinder 22 .

[0021] The locking member 23 includes a mounting plate 231, the side of which is fixedly connected to the circumferential outer surface of the upper cutting cylinder 21, and a snap-fit ​​groove 232 is provided on the side of the mounting plate 231 away from the upper cutting cylinder 21. A cavity is formed between adjacent mounting plates 231 for receiving the "transverse material" cut by the transverse cutting knife 24. The inner diameter of the cavity is much larger than the diameter of the "transverse material". During the subsequent rotation, under the action of centrifugal force, the "plastic particles" cut longitudinally again can be thrown out freely.

[0022] The cross-cutter 24 is fixedly connected to a locking plate 242 that fits with the inner wall of the locking groove 232 on one side close to the upper cutting cylinder 21. An elliptical groove 243 is provided on the end face of the cross-cutter 24. A positioning rod 244 is rotatably connected to the inside of the cross-cutter 24. The outer end of the positioning rod 244 passes through the elliptical groove 243 and is fixedly connected to a U-shaped wheel 245, and the thickness of the U-shaped wheel 245 is less than the depth of the elliptical groove 243.

[0023] A square hole 233 and an elliptical hole 234 are respectively opened inside the mounting plate 231. The square hole 233 and the elliptical hole 234 are connected to each other. The square hole 233 is located directly above the elliptical hole 234. The inner diameter of the elliptical hole 234 is consistent with the inner diameter of the elliptical groove 243. The U-shaped wheel 245 is located outside the mounting plate 231.

[0024] A protrusion 235 is fixedly connected to the end surface of the mounting plate 231 , and the protrusion 235 is connected to a frame plate 237 that fits and slides with the end surface of the mounting plate 231 via a strong spring 236 arranged on the outer surface of the protrusion 235 .

[0025] In the initial state, the U-shaped wheel 245 is located in the space surrounded by the frame plate 237 , and a U-shaped ring 238 that fits in the groove of the U-shaped wheel 245 is fixedly connected to the inner wall of the frame plate 237 .

[0026] A semicircular block 246 that slides against the inner wall of the square hole 233 is mounted on the circumferential outer surface of the positioning rod 244 , and a spring plate 247 that fits against the top of the inner wall of the square hole 233 is provided on the upper surface of the semicircular block 246 .

[0027] refer to Figure 1-Figure 7 In the process of plastic granulation, the granulator generally uses only one set of blades or two sets of blades. This is a more common configuration. Over time and continuous use, the single set of blades or two sets of blades are constantly in contact and friction with the plastic material, which will naturally cause wear, resulting in uneven particle size and irregular shape; In order to overcome the above-mentioned defects, the present invention designs a plastic particle processing equipment for plastic production.

[0028] Granulation process: The large pieces of waste plastic or unqualified plastic products are crushed by a crusher to reduce the particle size. Then, the material is melted at high temperature and then extruded. The cooled material enters through the feed port of the driving box body 1. At the same time, the driving unit outside the driving box body 1 drives the upper cutting cylinder 21 and the lower cutting cylinder 22 to rotate synchronously. When the material passes between the upper cutting cylinder 21 and the lower cutting cylinder 22, since the upper cutting cylinder 21 is detachably installed with a cross-cutting knife 24 through a locking piece 23 fixedly connected to the outer surface of its circumference, several groups of cross-cutting knives 24 are equidistantly distributed and do not interfere with each other. A cavity is formed between adjacent mounting plates 231 to receive the "transverse material" cut by the cross-cutting knife 24. At the same time, a notch close to the outer surface of the longitudinal cutting knife 25 is opened on the side of the unloading plate 11 close to the lower cutting cylinder 22, so the material passing between the upper cutting cylinder 21 and the lower cutting cylinder 22 can be synchronously bidirectionally cut by the cross-cutting knife 24 and the longitudinal cutting knife 25 to obtain plastic particles.

[0029] As can be seen from the above, the upper cutting barrel 21 and the lower cutting barrel 22 of the present application have the following advantages: Advantage 1: both the upper cutting cylinder 21 and the lower cutting cylinder 22 perform circular motion, driving the cross-cutting knife 24 and the longitudinal cutting knife 25 to rotate synchronously. The "circular rotation" cutting method of the two greatly improves the plastic granulation rate; the combined processing method of the two is not only suitable for the granulation of long strip materials, but also for the granulation of wide strip materials, with wide versatility and stable and consistent particle size.

[0030] Advantage 2: In the present application, the cross-cutting knives 24 and the longitudinal cutting knives 25 are provided with several groups, which greatly reduces the blade replacement cycle of the equipment compared with the traditional method of using only one or two groups of blades (a single group of blades or two groups of blades are in constant contact and friction with the plastic material, which naturally causes wear).

[0031] Advantage three, the cross-cutting knife 24 in the present application is installed by fitting with the inner wall of the locking groove 232 through the locking plate 242, which can prevent the cross-cutting knife 24 from tilting or loosening during the horizontal cutting process; at the same time, in combination with the semicircular block 246 and the spring plate 247, not only can the material be completely cut (avoiding insufficient cutting distance), but also a certain buffering effect is played on the cross-cutting knife 24 during the cutting process.

[0032] Advantage four: there is a cavity between adjacent mounting plates 231 for receiving the "transverse material" cut by the cross-cutting knife 24. The inner diameter of this cavity is much larger than the diameter of the "transverse material". During the subsequent rotation process, under the action of centrifugal force, the "plastic particles" cut longitudinally again can be thrown out freely (rotary cutting) to avoid the material sticking to the knife.

[0033] Conventional blades are generally disassembled and installed by bolts. During long-term operation, the bolts may become loose or rusty, which may easily damage the blade or make it difficult to disassemble and replace. In contrast, the cross-cutting knife 24 of the present application is detachably installed by a locking member 23, which can not only prevent the cross-cutting knife 24 from loosening and detaching, but also facilitate quick replacement of the cross-cutting knife 24.

[0034] Specifically, in the initial state, the cross-cutting knife 24 is rotatably connected to a positioning rod 244, and the outer end of the positioning rod 244 passes through the elliptical groove 243 and the square hole 233 in sequence, and extends to the space surrounded by the frame plate 237; because the outer end of the positioning rod 244 is fixedly connected to a U-shaped wheel 245, and the U-shaped wheel 245 is engaged with the U-shaped ring 238 in the frame plate 237, the frame plate 237 and the U-shaped ring 238 play a load-bearing role for the U-shaped wheel 245, the positioning rod 244 and the cross-cutting knife 24 as a whole. Under the strong pulling action of the strong spring 236, the clamping plate 242 on the cross-cutting knife 24 is stably fitted in the clamping groove 232, and when not subject to external forces, the clamping plate 242 is always in the clamping groove 232. At the same time, under the elastic force of the semicircular block 246 and the spring plate 247, the spring plate 247 and the strong spring 236 are maintained in a balanced state. At this time, the U-shaped wheel 245 is not only stably engaged on the outer surface of the U-shaped ring 238, but also located near the square hole 233. Therefore, without the action of external strong force, the U-shaped wheel 245 will not be able to separate from the frame plate 237 and the U-shaped ring 238, thereby ensuring the stability of the cross-cutting knife 24.

[0035] Take one set of cross-cutting knives 24 as an example: when it needs to be disassembled, select the frame plate 237 at one end of the cross-cutting knife 24, pull the frame plate 237 downward, and drive the frame plate 237 to slide downward along the outer surface of the mounting plate 231 until the U-shaped ring 238 moves below the elliptical hole 234. At this time, the U-shaped wheel 245 is separated from the U-shaped ring 238 and moves to the remaining space of the frame plate 237; then, push the U-shaped wheel 245 to separate from the frame plate 237 and transfer to the elliptical hole 234. Finally, the U-shaped wheel 245 slides out of the elliptical hole 234 and disappears in the elliptical groove 243; then, the cross-cutting knife 24 can be tilted, and the tilting direction is pulled downward toward one side of the frame plate 237, and the U-shaped wheel 245 disappears in the elliptical groove 243 and completely separates from the mounting plate 231. Similarly, by pulling down the frame plate 237 on the other side and sliding the positioning rod 244 and the U-shaped wheel 245 in the opposite direction, the cross-cutting knife 24 can be completely disassembled, and the reverse operation can be performed to quickly install the cross-cutting knife 24.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plastic particle processing equipment for plastic production, characterized in that: include: Drive box body (1); A granulation section (2), the granulation section (2) being located in a cavity surrounded by the drive box body (1), the granulation section (2) comprising an upper cutting cylinder (21) and a lower cutting cylinder (22), the upper cutting cylinder (21) being located directly above the lower cutting cylinder (22), the outer ends of the upper cutting cylinder (21) and the lower cutting cylinder (22) being rotatably connected to the interior of the drive box body (1); The upper cutting cylinder (21) is detachably mounted with a cross-cutting knife (24) via a locking piece (23) fixedly connected to the outer circumferential surface thereof; The cross-cutting knife (24) is provided with a plurality of component cuts (241) inside, and the outer circumferential surface of the lower cutting cylinder (22) is provided with a longitudinal cutting knife (25) close to the inner wall of the component cuts (241).

2. The plastic particle processing equipment for plastic production according to claim 1, characterized in that: A blanking plate (11) close to the outer surface of the circumference of the lower cutting cylinder (22) is installed at the outlet end of the driving box body (1), and a notch close to the outer surface of the longitudinal cutting knife (25) is formed on the side of the blanking plate (11) close to the lower cutting cylinder (22).

3. The plastic particle processing equipment for plastic production according to claim 1, characterized in that: The locking member (23) comprises a mounting plate (231), the side surface of the mounting plate (231) being fixedly connected to the circumferential outer surface of the upper cutting cylinder (21), a locking groove (232) being formed on a side of the mounting plate (231) away from the upper cutting cylinder (21), and a cavity being formed between adjacent mounting plates (231).

4. The plastic particle processing equipment for plastic production according to claim 3, characterized in that: A clamping plate (242) is fixedly connected to a side of the cross-cutting knife (24) close to the upper cutting cylinder (21) and is fitted with an inner wall of the clamping groove (232). An elliptical groove (243) is provided on the end surface of the cross-cutting knife (24). A positioning rod (244) is rotatably connected to the interior of the cross-cutting knife (24). The outer end of the positioning rod (244) passes through the elliptical groove (243) and is fixedly connected to a U-shaped wheel (245). The thickness of the U-shaped wheel (245) is smaller than the depth of the elliptical groove (243).

5. The plastic particle processing equipment for plastic production according to claim 4, characterized in that: A square hole (233) and an elliptical hole (234) are respectively provided inside the mounting plate (231); the square hole (233) and the elliptical hole (234) are connected to each other; the square hole (233) is located directly above the elliptical hole (234); the inner diameter of the elliptical hole (234) is consistent with the inner diameter of the elliptical groove (243); and the U-shaped wheel (245) is located outside the mounting plate (231).

6. The plastic particle processing equipment for plastic production according to claim 4, characterized in that: The end surface of the mounting plate (231) is fixedly connected to a protrusion (235), and the protrusion (235) is connected to a frame plate (237) that fits and slides with the end surface of the mounting plate (231) via a strong spring (236) arranged on the outer surface of the protrusion (235).

7. The plastic particle processing equipment for plastic production according to claim 6, characterized in that: In the initial state, the U-shaped wheel (245) is located in the space enclosed by the frame plate (237), and a U-shaped ring (238) that fits in the groove of the U-shaped wheel (245) is fixedly connected to the inner wall of the frame plate (237).

8. The plastic particle processing equipment for plastic production according to claim 5, characterized in that: A semicircular block (246) is mounted on the circumferential outer surface of the positioning rod (244) and slides with the inner wall of the square hole (233), and a spring plate (247) is arranged on the upper surface of the semicircular block (246) and fits with the top of the inner wall of the square hole (233).

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