Plastic particle cutting machine

Abstract

The utility model relates to the technical field of grain cutting machines, and discloses a plastic grain cutting machine which comprises a shell, a feeding port is formed in one side of the shell, and a feeding unit and a cutting unit are sequentially arranged in the shell in the direction away from the feeding port. The feeding unit comprises a feeding roller and a feeding table which are sequentially arranged in the feeding direction, a guide assembly is arranged on the side, facing a feeding port, of the feeding roller, and a first limiting assembly and a second limiting assembly are sequentially arranged above the feeding table in the feeding direction; a first limiting roller in the first limiting assembly can move in the vertical direction, so that the height of the first material passing channel can be adaptively adjusted according to the inclination degree of the plastic strip, the plastic strip can be preliminarily limited, the plastic strip and the feeding table are relatively attached, and the conveying efficiency is improved; and the situation that the plastic strip is broken and damaged due to the fact that the first limiting assembly exerts too large external force on the plastic strip can be avoided.

Description

Technical Field

[0001] This utility model belongs to the field of pelletizing machine technology, and specifically relates to a plastic pelletizing machine. Background Technology

[0002] A plastic pelletizer is a mechanical device used to cut extruded plastic strips into uniform pellets (i.e., plastic granules), which facilitates subsequent transportation, storage, and utilization. Pelletizers are widely used in industries such as plastic granulation, recycled material processing, injection molding, and blow molding. A plastic pelletizer mainly consists of a feeding unit and a cutting unit. The feeding unit transports the plastic strip into the pelletizer, where it is then cut by the cutting unit. The feeding unit typically includes feeding rollers and a feeding table arranged sequentially towards the cutting unit. However, when the plastic strip reaches the feeding table, especially during cutting, the plastic is prone to swaying under external forces, resulting not only in poor granule size uniformity but also affecting the smoothness of the cut surface. Summary of the Invention

[0003] In view of this, the purpose of this utility model is to provide a plastic pelletizer to solve the technical problem that the feeding table in the prior art cannot limit the plastic strip.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A plastic pelletizer includes a housing with a feed inlet on one side. Inside the housing, a feeding unit and a cutting unit are sequentially arranged along the direction away from the feed inlet. The feeding unit includes a feeding roller and a feeding platform arranged sequentially along the feeding direction. A guide assembly is provided on the side of the feeding roller facing the feed inlet. A first limiting assembly and a second limiting assembly are sequentially arranged above the feeding platform along the feeding direction. The first limiting assembly includes a first limiting roller located above the feeding platform and near the feeding roller. The first limiting roller has a shaft hole, through which a rotating shaft... The moving connection has a connecting shaft, which includes a horizontal section and vertical sections located at both ends of the horizontal section. A connecting rod is provided directly above the vertical section, and a receiving groove is opened on the bottom surface of the connecting rod. The top part of the vertical section extends into the receiving groove, and a first limiting ring is fitted on the top of the vertical section. The sliding connection between the vertical section and the connecting rod is realized through the first limiting ring. A second limiting ring is fitted at the opening of the receiving groove to limit the vertical section. A spring is provided between the bottom of the receiving groove and the vertical section, and the spring is always in a compressed state.

[0006] Furthermore, a first material passage is formed between the first limiting roller and the top surface of the feeding table, and the height of the first material passage is greater than the diameter of the plastic strip;

[0007] Furthermore, the bottom surface of the connecting rod has a cylindrical receiving groove extending vertically upward, and the inner diameter of the receiving groove is larger than the diameter of the vertical section.

[0008] Furthermore, multiple annular guide grooves are evenly spaced along the length direction on the outer surface of the feed roller. The guide assembly includes a guide cylinder that is arranged opposite to the guide groove and corresponds to it one by one. The guide cylinder is in the shape of a truncated cone, with the top of the guide cylinder facing the feed roller. A through guide channel is formed inside the guide cylinder, and the cross-sectional area of ​​the guide channel gradually increases along the direction close to the feed roller.

[0009] Furthermore, a connecting plate is fitted at the bottom end of the guide tube, and the guide tube is fixed to the feed inlet by the connecting plate;

[0010] Furthermore, an extension ring is provided at the top of the guide tube, and the inner diameter of the extension ring is consistent with the inner diameter of the top opening of the guide channel;

[0011] Furthermore, the second limiting component includes a second limiting roller located above the feeding table and near the cutting unit. A second material passage is formed between the second limiting roller and the top surface of the feeding table, and the height of the second material passage is equal to the diameter of the plastic strip.

[0012] The beneficial effects of this utility model are as follows:

[0013] (1) Compared with the prior art, the first limiting roller in the first limiting component can be displaced in the vertical direction, so that the height of the first feeding channel can be adjusted according to the inclination of the plastic strip. It can not only initially limit the plastic strip so that the plastic strip is more closely attached to the feeding table, but also avoid the first limiting component from applying too much external force to the plastic strip, causing the plastic strip to break or be damaged. By setting the second limiting component, the plastic strip is further pressed and limited under the action of the second limiting roller, preventing the plastic strip from swinging due to external force during the cutting process, thereby ensuring the regularity of the cutting surface and the overall uniformity of the plastic particles.

[0014] (2) By setting a guide component, the plastic strip enters the guide channel through the bottom of the guide cylinder. The guide channel guides the conveying of the plastic strip so that when the plastic strip is exposed at the top of the guide cylinder, it is exactly aligned with the guide groove on the feeding roller. This effectively ensures the precise matching of the plastic strip and the guide groove, thus eliminating the need for manual assistance. This improves the conveying efficiency of the plastic strip while reducing labor costs. Attached Figure Description

[0015] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0016] Figure 1 This is a schematic diagram of the plastic pelletizer in Embodiment 1 of this utility model;

[0017] Figure 2 This is a cross-sectional view of the plastic pelletizer in Embodiment 1 of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the plastic pelletizer in Embodiment 1 of this utility model (hidden shell);

[0019] Figure 4 This is a schematic diagram of the guide tube in Embodiment 1 of this utility model;

[0020] Figure 5 This is a cross-sectional view of the first limiting component in Embodiment 1 of this utility model;

[0021] Figure 6 for Figure 5 Enlarged view at point A1;

[0022] Figure 7 for Figure 5 Enlarged view at point A2;

[0023] The following labels are shown in the attached diagram:

[0024] Housing 1, top cover 101, side plate 102, inlet 103, outlet 104, feeding unit 2, feeding roller 201, feeding table 202, guide tube 203, extension ring 204, connecting plate 205, first limiting assembly 206, first limiting roller 207, shaft hole 208, horizontal section 209, vertical section 210, bearing 211, first limiting ring 212, connecting rod 213, receiving groove 214, second limiting ring 215, spring 216, second limiting assembly 217, second limiting roller 218, rotating shaft 219, connecting shaft 220, cutting unit 3, cutting roller 301, cutter 302. Detailed Implementation

[0025] Example 1, specifically as follows Figures 1-7 As shown.

[0026] A plastic pelletizer includes a housing 1 with a feed inlet 103 on one side. Inside the housing 1, a feeding unit 2 and a cutting unit 3 are sequentially arranged along the direction away from the feed inlet 103. The feeding unit 2 includes a feeding roller 201 and a feeding table 202 arranged sequentially along the feeding direction. A guide component is provided on the side of the feeding roller 201 facing the feed inlet 103. A first limiting component 206 and a second limiting component 217 are sequentially arranged above the feeding table 202 along the feeding direction.

[0027] like Figures 1-4As shown, the shell 1 is generally rectangular in shape, with an internal cavity. A top cover plate 101 is provided at the opening on the top surface of the cavity, and the top cover plate 101 is connected to the shell 1 by screws. A side plate 102 is provided at the opening on the side connected to the top surface, and similarly, the side plate 102 is connected to the shell 1 by screws. The opening of the cavity is sealed by the top cover plate 101 and the side plate 102. A feed inlet 103 is provided on the side plate 102, through which the plastic strip to be cut enters the interior of the shell 1. A discharge outlet 104 is provided on the bottom plate of the cavity, through which the cut plastic granules are discharged.

[0028] The feeding roller 201 is cylindrical, and its extension direction is perpendicular to the opening direction of the feed inlet 103. There is a gap between the two ends of the feeding roller 201 and the inner wall of the housing 1, and the two are connected by a shaft hole type rotating connection. A first motor (not shown in the figure) is provided on one side of the connecting shaft. The output shaft of the first motor is connected and driven by the connecting shaft through a coupling. Under the drive of the first motor, the feeding roller 201 rotates to realize the conveying of plastic strips.

[0029] Multiple annular guide grooves are evenly spaced along the length of the outer surface of the feeding roller 201. During transportation, the plastic strip needs to enter the guide grooves for diversion and transport. However, in the prior art, the plastic strip often cannot accurately enter the guide grooves, requiring manual assistance, which affects the transportation efficiency of the plastic strip and increases labor costs.

[0030] To address this, a guide assembly is provided on the side of the feeding roller 201 facing the feed inlet 103. The guide assembly includes a guide cylinder 203 that is positioned opposite to and corresponds one-to-one with the guide groove. The guide cylinder 203 is generally truncated cone-shaped, meaning that both the top and bottom ends are flat and the top area is smaller than the bottom area. Notably, in this embodiment, its top surface is circular and its bottom surface is a rounded rectangle. The top end of the guide cylinder 203 faces the feeding roller 201, and a through-flow channel is formed inside the guide cylinder 203. The shape of the guide channel is consistent with that of the guide cylinder 203, and the cross-sectional area of ​​the guide channel gradually increases along the direction closer to the feeding roller 201.

[0031] Multiple guide tubes 203 are welded and fixed together to form a whole, which facilitates the installation and fixation of the guide tubes 203. The bottom surface of the guide tube 203 is flush with the outer surface of the side plate 102. A connecting plate 205 is fitted at the bottom end of the guide tube 203. The size of the connecting plate 205 is the same as that of the feed inlet 103, and the connecting plate 205 is welded and fixed to the feed inlet 103. The guide tube 203 is fixed to the feed inlet 103 by the connecting plate 205.

[0032] By setting a guide component, the plastic strip enters the guide channel through the bottom of the guide cylinder 203. The guide channel guides the conveying of the plastic strip so that when the plastic strip is exposed at the top of the guide cylinder 203, it is exactly aligned with the guide groove on the feeding roller 201. This effectively ensures the precise matching of the plastic strip and the guide groove, eliminating the need for manual assistance, improving the transportation efficiency of the plastic strip and reducing labor costs.

[0033] An extension ring 204 is welded to the top of the guide tube 203. The inner diameter of the extension ring 204 is the same as the inner diameter of the top opening of the guide channel, and the outer diameter of the extension ring 204 is the same as the outer diameter of the top opening of the guide channel. The extension ring 204 can further enhance the guiding effect on the plastic strip.

[0034] like Figure 3 As shown, the feeding platform 202 is flat, with a ramp on the side facing the feeding roller 201. This ramp facilitates a smooth transition during the conveying of the plastic strip. Baffles are welded to the two side walls of the feeding platform 202 parallel to the feeding direction. These baffles limit the movement of the plastic strip, preventing it from detaching from the feeding platform 202 during transport. Furthermore, plate-shaped fasteners are welded between the side baffles of the feeding platform 202 and the housing 1, thus enabling the installation and fixation of the feeding platform 202.

[0035] like Figures 5-7 As shown, the first limiting component 206 includes a first limiting roller 207 located above the feeding table 202 and near the feeding roller 201. The extension direction of the first limiting roller 207 is perpendicular to the feeding direction. A first material passage is formed between the first limiting roller 207 and the top surface of the feeding table 202. The height of the first material passage is greater than the diameter of the plastic strip. A through shaft hole 208 is axially formed inside the first limiting roller 207, and the axis of the shaft hole 208 coincides with the axis of the first limiting roller 207. A connecting shaft 220 is rotatably connected inside the shaft hole 208. Specifically, the connecting shaft 220 includes a horizontal section 209 and vertical sections 210 located at both ends of the horizontal section 209. The axis of the horizontal section 209 coincides with the axis of the shaft hole 208, and the diameter of the horizontal section 209 is smaller than the inner diameter of the shaft hole 208. The two are rotatably connected by a bearing 211.

[0036] A connecting rod 213 is provided directly above the vertical section 210. The top of the connecting rod 213 is welded and fixed to the bottom surface of the upper cover plate 101. A cylindrical receiving groove 214 extending upward in the vertical direction is opened on the bottom surface of the connecting rod 213. The inner diameter of the receiving groove 214 is larger than the diameter of the vertical section 210. The top part of the vertical section 210 extends into the receiving groove 214. It is worth further explaining that a first limiting ring 212 is fitted at the top of the vertical section 210. The outer diameter of the first limiting ring 212 is the same as the inner diameter of the receiving groove 214. The sliding connection between the vertical section 210 and the connecting rod 213 is achieved through the first limiting ring 212. A second limiting ring 215 is fitted at the opening of the receiving groove 214. The inner diameter of the second limiting ring 215 is the same as the diameter of the vertical section 210. The second limiting ring 215 limits the vertical section 210 and prevents the entire connecting shaft 220 and the first limiting roller 207 from separating from the connecting rod 213.

[0037] In addition, a spring 216 is provided between the bottom of the receiving groove 214 and the vertical section 210. The spring 216 is always in a compressed state. The top end of the spring 216 is welded and fixed to the bottom of the receiving groove 214, and the bottom end of the spring 216 is welded and fixed to the top surface of the vertical section 210.

[0038] The second limiting component 217 includes a second limiting roller 218 located above the feeding table 202 and near the cutting unit 3. The extension direction of the second limiting roller 218 is perpendicular to the feeding direction. A second material passage is formed between the second limiting roller 218 and the top surface of the feeding table 202. The height of the second material passage is equal to the diameter of the plastic strip. Both ends of the second limiting roller 218 are rotatably connected to the housing 1 via rotating shafts 219. A second motor (not shown in the figure) is connected to one of the rotating shafts. The output shaft of the second motor is connected to the second limiting roller 218 via a coupling. The second motor drives the second limiting roller 218 to rotate.

[0039] The cutting unit 3 includes a cutting roller 301, on which multiple cutters 302 are evenly distributed along the circumferential direction. Both ends of the cutting roller 301 are rotatably connected to the housing, and one end is connected to a third motor. The cutting roller 301 is driven to rotate by the third motor. This is prior art and will not be described in detail here.

[0040] During use, the plastic strip moves onto the feeding table 202 under the action of the feeding roller 201 and continues to move towards the cutting unit 3. Especially since the different heights of the feeding roller 201 and the feeding table 202 cause an angle between the plastic strip and the feeding table 202, the first limiting roller 207 in the first limiting component 206 can be displaced vertically. This allows for adaptive adjustment of the height of the first feeding channel according to the inclination of the plastic strip. This not only provides initial positioning of the plastic strip, ensuring a closer fit between it and the feeding table 202, but also prevents the first limiting component 206 from applying excessive external force, which could cause breakage or damage to the plastic strip. By setting a second limiting component 217, the plastic strip is further pressed and positioned under the action of the second limiting roller 218, preventing the plastic strip from swaying due to external forces during cutting, thus ensuring the regularity of the cut surface and the overall uniformity of the plastic particles.

[0041] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A plastic pelletizer, characterized in that, The device includes a housing with a feed inlet on one side. Inside the housing, a feeding unit and a cutting unit are sequentially arranged along the direction away from the feed inlet. The feeding unit includes a feeding roller and a feeding platform arranged sequentially along the feeding direction. A guide assembly is provided on the side of the feeding roller facing the feed inlet. A first limiting assembly and a second limiting assembly are sequentially arranged above the feeding platform along the feeding direction. The first limiting assembly includes a first limiting roller located above the feeding platform and close to the feeding roller. The first limiting roller has a shaft hole, and a connecting shaft is rotatably connected in the shaft hole. The connecting shaft includes a horizontal section and vertical sections located at both ends of the horizontal section. A connecting rod is provided directly above the vertical section. A receiving groove is provided on the bottom surface of the connecting rod. The top part of the vertical section extends into the receiving groove. A first limiting ring is fitted on the top of the vertical section, enabling a sliding connection between the vertical section and the connecting rod. A second limiting ring is fitted at the opening of the receiving groove, limiting the vertical section. A spring is provided between the bottom of the receiving groove and the vertical section, and the spring is always in a compressed state.

2. The plastic pelletizer according to claim 1, characterized in that, A first material passage is formed between the first limiting roller and the top surface of the feeding table, and the height of the first material passage is greater than the diameter of the plastic strip.

3. The plastic pelletizer according to claim 2, characterized in that, The bottom surface of the connecting rod has a cylindrical receiving groove that extends vertically upwards, and the inner diameter of the receiving groove is larger than the diameter of the vertical section.

4. The plastic pelletizer according to claim 1, characterized in that, Multiple annular guide grooves are evenly spaced along the length of the outer surface of the feed roller. The guide assembly includes a guide cylinder that is arranged opposite to the guide groove and corresponds to it one by one. The guide cylinder is truncated cone in shape, with the top of the guide cylinder facing the feed roller. A through guide channel is formed inside the guide cylinder, and the cross-sectional area of ​​the guide channel gradually increases along the direction close to the feed roller.

5. The plastic pelletizer according to claim 4, characterized in that, A connecting plate is fitted at the bottom end of the guide tube, and the guide tube is fixed at the feed inlet by the connecting plate.

6. The plastic pelletizer according to claim 5, characterized in that, An extension ring is provided at the top of the guide tube, and the inner diameter of the extension ring is the same as the inner diameter of the opening at the top of the guide channel.

7. The plastic pelletizer according to claim 1, characterized in that, The second limiting component includes a second limiting roller located above the feeding table and near the cutting unit. A second material passage is formed between the second limiting roller and the top surface of the feeding table. The height of the second material passage is equal to the diameter of the plastic strip.

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