Tool changing mechanism of granulator

Abstract

The cutter changing mechanism comprises a cutter shaft and a blade, a plurality of equidistant mounting grooves are formed in the circumferential side wall of the cutter shaft in a surrounding mode, a plurality of mounting holes communicated with the mounting grooves in a one-to-one mode are formed in the two plane side walls of the cutter shaft, and screws are mounted in the mounting holes; the blade comprises a tool bit and a tool apron, the shape structure of the tool apron is matched with the shape structure of the mounting groove, so that the tool apron can be inserted into the mounting groove, and screw holes corresponding to the screws are formed in the two side walls of the tool apron in the width direction. The single blade can be disassembled, assembled and replaced conveniently, and the blade has the advantages of being simple in structure and firm in installation.

Description

Technical Field

[0001] The utility model belongs to the technical field of pelletizer accessories, and particularly relates to a cutter changing mechanism of a pelletizer. Background Art

[0002] Pelletizers mostly refer to plastic pelletizers, which are mainly used to process waste plastic films. Specifically, they use multiple sets of blades to cut the strips or sheets of plastic extruded by the extruder into pellets.

[0003] Existing pelletizer blades are typically integrated with the blade shaft or roller, requiring replacement of the entire blade. This increases costs and requires time and effort for assembly and disassembly. Existing pelletizers designed to allow for single blade replacement often have complex structures or require additional peripherals for replacement, resulting in high design costs and cumbersome assembly and disassembly procedures. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the present invention provides a blade changing mechanism for a pelletizer, which can facilitate the disassembly, assembly and replacement of a single blade and has the advantages of simple structure and reliable installation.

[0005] The utility model discloses a blade changing mechanism for a pelletizer, comprising a blade shaft and a blade. The blade shaft is provided with a plurality of equally spaced mounting grooves on its circumferential side wall. The two planar side walls of the blade shaft are provided with a plurality of mounting holes that are in one-to-one communication with the mounting grooves. Screws are installed in the mounting holes.

[0006] The blade includes a blade head and a blade seat. The shape structure of the blade seat is matched with the shape structure of the installation groove so that the blade seat can be inserted into the installation groove. Both side walls of the blade seat along the width direction are provided with screw holes corresponding to the screw rod.

[0007] Furthermore, a first protrusion is provided at the bottom of the knife seat, and a first groove is correspondingly provided at the bottom of the mounting groove.

[0008] Furthermore, a plurality of the first protrusions and the first grooves are provided at equal intervals.

[0009] Furthermore, a second protrusion is provided on the upper end of the side wall of the knife seat along the length direction, and a second groove is correspondingly provided on the inner side wall of the installation groove.

[0010] Furthermore, the installation groove is a "convex"-shaped groove with a bending portion.

[0011] Furthermore, the screw is connected with a gasket.

[0012] The beneficial effects of the utility model are:

[0013] The utility model provides a mounting groove in the middle of the circumferential side wall of the blade shaft, and then provides mounting holes on both planar side walls of the blade shaft that can communicate with the mounting groove. At the same time, screw holes are provided on both side walls of the blade holder along the width direction, so that screws can be passed through the mounting holes from both sides and fixedly connected to the screw holes to achieve the installation of the blade. When disassembling and replacing, it is only necessary to loosen the screws on both sides, then remove the blade from the mounting groove, then place a new blade in the mounting groove, and finally tighten the screws on both sides to achieve the replacement of the blade. Therefore, the utility model can facilitate the disassembly and replacement of a single blade, and at the same time has the advantages of simple structure, reliable installation, no need for additional auxiliary devices, and is conducive to saving design and installation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the structural diagram of the pelletizer;

[0015] Figure 2 This is a structural diagram of a cutter changing mechanism of a pelletizer according to the present invention;

[0016] Figure 3 for Figure 2 Schematic diagram of the structure after one of the blades is removed;

[0017] Figure 4 for Figure 3 Schematic diagram of the structure of the removed blade;

[0018] Figure 5 It is a schematic diagram of the side plan structure of the cutter changing mechanism of the pelletizer;

[0019] Figure 6 for Figure 5 Schematic diagram of the enlarged structure within the dotted circle:

[0020] Figure 7 for Figure 6 Schematic diagram of the structure after removing the blade;

[0021] Figure 8 This is a structural diagram when the knife seat is provided with a first protrusion and the mounting groove is provided with a first groove;

[0022] Figure 9 This is a structural diagram when the knife seat is provided with a second protrusion and the mounting groove is provided with a second groove;

[0023] In the figure: cutter shaft 1, blade 2, mounting groove 3, mounting hole 4, screw 5, cutter head 6, cutter seat 7, screw hole 8, first protrusion 9, first groove 10, second protrusion 11, second groove 12, bending portion 13, through hole 14, pelletizer 15, pelletizing chamber 16. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] like Figures 1 to 9 As shown, the present invention is a blade changing mechanism of a pelletizer, comprising a blade shaft 1 and a blade 2. A plurality of equally spaced mounting grooves 3 are arranged around the circumferential side wall of the blade shaft 1. A plurality of mounting holes 4 are opened on both planar side walls of the blade shaft 1, each of which is in one-to-one communication with the mounting grooves 3. A screw 5 is provided in each mounting hole 4.

[0028] The blade 2 includes a blade head 6 and a blade seat 7. The shape and structure of the blade seat 7 are matched with the shape and structure of the mounting groove 3, so that the blade seat 7 can be inserted into the mounting groove 3. The two side walls of the blade seat 7 along the width direction are provided with screw holes 8 corresponding to the screw rod 5.

[0029] Specifically, such as Figure 1 and Figure 2 As shown, the cutter shaft 1 and blades 2 of the present invention are installed in the pelletizing chamber 16 of a pelletizer 15. This installation is achieved through a rotational connection between a rotating shaft provided in the pelletizing chamber 16 and a through-hole 14 drilled in the center of the cutter shaft 1. During operation, the motor in the pelletizer 15 drives the rotating shaft and cutter shaft, ultimately driving the multiple blades 2 to cut the plastic strips or sheets extruded by the extruder and fed into the pelletizing chamber into pellets. The principles of the rotating shaft, extruder, pelletizer 15, and pelletizing chamber 16, as well as their interconnections, are well known to those skilled in the art and will not be further elaborated here.

[0030] In this embodiment, the biggest difference compared with the prior art is that the mounting groove 3 of the blade 2 does not completely penetrate the circumferential side wall of the cutter shaft 1, and there is no need to add a mounting plate to fix the blade 2 from both sides. Instead, the mounting groove 3 is set in the middle of the circumferential side wall of the cutter shaft 1. Figure 2 and Figure 3 As shown, there are 24 corresponding mounting slots 3 and blades 2, and mounting holes 4 that can communicate with the mounting slots 3 are provided on both flat side walls of the blade shaft 1. At the same time, screw holes 8 are provided on both side walls of the blade seat 7 along the width direction, so that screws 5 can be passed through the mounting holes 4 and fixedly connected to the screw holes 8 from both sides to achieve the installation of the blade 2; when disassembling and replacing, it is only necessary to loosen the screws 5 on both sides, then remove the blade 2 from the mounting slot 3, then put a new blade 2 into the mounting slot 3, and finally tighten the screws 5 on both sides to achieve the replacement of the blade 2. Therefore, the utility model can facilitate the disassembly, assembly and replacement of a single blade 2. Furthermore, an electric device can be provided to automatically control the electric screwdriver to tighten or loosen the screws 5 on both sides of the blade 2 to be replaced, which can further save the effort and time of replacing the blade 2, and is conducive to further improving the convenience and efficiency of replacing the blade 2.

[0031] At the same time, the present invention secures the blade 2 by fixing the blade 2 with the screws 5 on both sides, ensuring that the blade 2 is securely mounted. Compared to the prior art, the present invention has a simple structure and does not require additional auxiliary devices, which is beneficial for saving design and installation costs. The screws 5 can be connected to washers, which can increase friction and provide a buffering and protective effect, thereby preventing significant damage to components such as the blade shaft 1 and the screws 5, thereby increasing the service life of the components such as the screws 5.

[0032] Among them, in the present application, the mounting groove 3 can be obtained by cutting the circumferential side wall of the cutter shaft 1 by a milling cutter of a machine tool, and the mounting hole 4 and the screw hole 8 can be obtained by drilling the two planar side walls of the cutter shaft 1 on both sides and the two side walls of the cutter seat 7 along the width direction by a drill bit. The cutter shaft 1 and its through hole 14 can be made by injection molding or die casting in combination with a special mold, and the cutter head 6 and the cutter seat 7 can be fixedly connected by welding or the like, or can be die-cast or injection molded as a whole by a special mold.

[0033] In an optional embodiment, as Figure 7 As shown, the mounting groove 3 is a convex groove having a bent portion 13 .

[0034] Specifically, by setting the mounting slot 3 as follows Figure 7 The "convex"-shaped groove shown has a bending portion 13, which can play a certain fixing and limiting role on the knife holder 7 when the knife holder 7 is fully inserted and installed, facilitating the subsequent installation and fixation of the screw rod 5 to ensure that the blade 2 can be installed smoothly.

[0035] In an optional embodiment, as Figure 8 As shown, a first protrusion 9 is provided at the bottom of the knife seat 7, and a first groove 10 is correspondingly provided at the bottom of the mounting groove 3.

[0036] Specifically, by setting the first protrusion 9 and the first groove 10 that match each other, when the blade 2 is installed, the first protrusion 9 and the first groove 10 can be aligned and assembled to play a certain limiting and fixing role on the knife seat 7, thereby facilitating the alignment of the screw 5 with the screw hole 8 for tightening, thereby facilitating the installation of the blade 2.

[0037] Furthermore, a plurality of first protrusions 9 and first grooves 10 are provided at equal intervals. By providing a plurality of first protrusions 9 and first grooves 10, the limiting and fixing function of the blade holder 7 during installation can be further enhanced, which is conducive to further facilitating the installation of the blade 2.

[0038] In an optional embodiment, as Figure 9 As shown, a second protrusion 11 is provided at the upper end of the side wall of the knife seat 7 along the length direction, and a second groove 12 is correspondingly provided on the inner side wall of the installation groove 3.

[0039] Specifically, the second protrusion 11 and the second groove 12 have the same function as the above-mentioned first protrusion 9 and the first groove 10. They can also play a certain role in limiting and fixing the knife seat 7, and also help to ensure that the screw hole 8 is stable and does not get misaligned with the screw rod 5 during installation, thereby ensuring that the blade 2 can be installed smoothly and quickly.

[0040] The above shows and describes the basic principles, main features and 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 merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A blade changing mechanism for a pelletizer, characterized in that: The present invention comprises a knife shaft (1) and a blade (2), wherein a plurality of equally spaced mounting grooves (3) are arranged around the circumferential side wall of the knife shaft (1), and a plurality of mounting holes (4) are opened on both planar side walls of the knife shaft (1) and are connected one-to-one with the mounting grooves (3), wherein screws (5) are installed in the mounting holes (4); The blade (2) comprises a blade head (6) and a blade seat (7); the shape and structure of the blade seat (7) are matched with the shape and structure of the mounting groove (3), so that the blade seat (7) can be inserted into the mounting groove (3); screw holes (8) corresponding to the screw rod (5) are provided on both side walls of the blade seat (7) along the width direction; A first protrusion (9) is provided at the bottom of the knife seat (7), and a first groove (10) is correspondingly provided in the bottom of the mounting groove (3).

2. The blade changing mechanism of a pelletizer according to claim 1, characterized in that: A plurality of the first protrusions (9) and the first grooves (10) are provided at equal intervals.

3. The blade changing mechanism of a pelletizer according to claim 1, characterized in that: The upper end of the side wall of the knife seat (7) along the length direction is provided with a second protrusion (11), and the inner side wall of the installation groove (3) is correspondingly provided with a second groove (12).

4. The blade changing mechanism of a pelletizer according to claim 1, characterized in that: The installation groove (3) is a "convex"-shaped groove having a bent portion (13).

5. The blade changing mechanism of a pelletizer according to claim 1, characterized in that: The screw (5) is connected with a gasket.

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