CN215619283U - Die surface granulating device and nylon plastic granulator comprising same - Google Patents

Abstract

The utility model relates to a die surface granulating device, wherein a cutting part of the die surface granulating device comprises a cutter head and a cutter assembly. The cutter component comprises a bearing arm, a cutter, a locking screw and a locking nut. A clamping groove extends downwards from the upper end surface of the bearing arm. After the cutter is placed in position relative to the clamping groove, the locking screw transversely penetrates through the cutter to lock the cutter on the cutter disc. When the bearing arm is screwed in place relative to the cutter head, the relative position is locked by the locking nut. Therefore, when a certain cutter is seriously worn or is broken, only the cutter needs to be independently replaced by a new cutter. In addition, when the diameter of a material conveying cylinder for molding the long-strip-shaped nylon plastic is changed, the extending length of the bearing arm can be adjusted according to actual conditions, namely the working radius of the cutter assembly is changed, so that accurate alignment of the cutter assembly and the long-strip-shaped nylon plastic to be cut can be better realized. In addition, the utility model also relates to a nylon plastic granulator.

Description

Die surface granulating device and nylon plastic granulator comprising same

Technical Field

The utility model relates to the technical field of nylon plastic manufacturing, in particular to a die surface granulating device and a nylon plastic granulator comprising the same.

Background

The nylon plastic granulator is a forming machine which can make waste nylon plastic into granular materials so as to improve the raw material support for the later injection molding process. The nylon plastic granulator is widely applied to the fields of chemical industry, petrifaction, pharmacy, food, building materials, mining and metallurgy, environmental protection, printing and dyeing, ceramics, rubber, plastics and the like.

Nylon plastic is melted under the action of heat in the conveying cylinder, and is pushed into a grain cutting cavity of the die surface grain cutting device under the action of extrusion force of a material pushing screw rod sleeved in the conveying cylinder, and then the cutter performs high-speed rotary motion to cut the strip nylon plastic into particles. In the prior art, a die face pelletizing device mainly comprises a shell, a cutting tool, a power part and the like. A material cutting cavity which is opposite to the discharge hole of the material conveying cylinder is arranged in the shell. The cutting tool is arranged in the cutting cavity in a built-in mode, and high-speed rotating motion is executed under the driving force of the first power part so as to complete grain cutting operation on the strip nylon plastic. However, the existing cutting tool is of an integrated design structure, so that on one hand, when a local area of the cutting tool is damaged, the cutting tool needs to be replaced integrally, time and labor are wasted, and the use and maintenance cost of a nylon plastic granulator is inevitably increased; on the other hand, when the inner diameter of the material conveying cylinder is changed (that is, the radius value of the extending area of the nylon strip is changed), the cutting radius of the cutting tool is not easily adjusted, so that the deviation of the alignment of the cutting edge with respect to the nylon strip is inevitable, and the cutting efficiency and the cutting quality are finally reduced. Thus, a skilled person is urgently needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

Therefore, in view of the above-mentioned problems and drawbacks, the present inventors have collected relevant information, evaluated and considered in many ways, and made continuous experiments and modifications by technicians engaged in many years of research and development experience in this industry, which finally resulted in the appearance of the die face dicing apparatus.

In order to solve the technical problem, the utility model relates to a die face granulating device which comprises a shell, a cutting part and a first power part. A material cutting cavity is arranged in the shell. And a feeding hole and a discharging hole which are communicated with the material cutting cavity are respectively arranged on the left side wall and the lower side wall of the shell in a one-to-one correspondence manner. The cutting part is arranged in the cutting cavity and is driven by the first power part. The cutting part comprises a cutter head and N cutter assemblies. The cutter head performs circumferential rotation motion around the central axis thereof under the driving force of the first power part. The cutter components comprise bearing arms, cutters, locking screws and locking nuts. And N first threaded holes matched with the bearing arms are uniformly distributed on the outer side wall of the cutter head around the circumference of the cutter head. And a section of external thread matched with the first threaded hole is formed on the outer side wall of the bearing arm at a preset height from the lower end surface of the bearing arm. A clamping groove matched with the cutter extends downwards from the upper end surface of the bearing arm, and at least one second threaded hole matched with the locking screw and communicated with the clamping groove is formed in the side wall of the bearing arm. The cutter is provided with at least one mounting hole matched with the locking screw. After the cutter is placed in position relative to the clamping groove, the locking screw penetrates through the mounting hole through the second threaded hole. And when the bearing arm is screwed in place relative to the first threaded hole, the locking nut is screwed along the external thread until the locking nut is completely attached to the outer side wall of the cutter head.

As a further improvement of the technical scheme of the utility model, the mounting hole is preferably a long waist-shaped hole and extends along the length direction of the cutting knife.

As a further improvement of the technical solution of the present invention, for a single cutter, the number of the mounting holes is set to 2, and the mounting holes are arranged along the width direction of the cutter.

As a further improvement of the technical scheme of the utility model, the first power part comprises a motor, a rotating shaft and a bearing supporting assembly. The motor is arranged on the right side of the shell and outputs rotating torque to the rotating shaft. The cutter head is inserted and matched on the rotating shaft, and correspondingly, an inserting and matching counter bore matched with the outer diameter of the rotating shaft extends towards the left from the right end surface of the cutter head. The bearing support component is used for supporting the rotating shaft and is embedded on the right side wall of the shell.

As a further improvement of the technical scheme of the utility model, the bearing support assembly comprises a left end cover, a left ball bearing, a right end cover, a spacer bush and a right ball bearing. An annular mounting seat extends inwards from the right side wall of the shell. An inserting and matching cavity is formed in the annular mounting seat. The left ball bearing and the right ball bearing are both arranged in the inserting and matching cavity and are penetrated by the rotating shaft. The spacer bush is used for separating the left ball bearing and the right ball bearing and is sleeved on the rotating shaft. The left end cover is detachably fixed on the left side wall of the annular mounting seat, and carries out axial limiting and pre-tightening on the left ball bearing. The right end cover is detachably fixed on the right side wall of the annular mounting seat and axially limits and pre-tightens the right ball bearing.

Compared with the die surface granulating device with the traditional design structure, in the technical scheme disclosed by the utility model, the cutting part is designed into a split structure. After a period of operation, when a certain cutter is seriously worn or has a broken edge, only the cutter needs to be independently renewed, and the rest cutters are still reserved, so that the maintenance cost of the die surface granulating device and the total investment time required by the renewal operation are effectively reduced. In addition, when the diameter of a conveying cylinder for forming the long-strip nylon plastic is changed, the extending length of the bearing arm can be adjusted according to actual conditions, namely, the change of the working radius of the cutter assembly is realized, so that the accurate alignment of the cutter assembly and the long-strip nylon plastic to be cut is better realized, and the grain cutting process is ensured to be executed efficiently and high-quality.

In addition, the utility model also relates to a nylon plastic granulator which comprises a machine table, a material conveying cylinder, a feeding bin, a material pushing screw, a second power part, a heating part, a granule cutting collecting unit and the die surface granule cutting device. The material conveying cylinder is horizontally arranged right above the machine table. The feeding bin is detachably fixed on the material conveying cylinder, and correspondingly, a feeding hole is formed in the material conveying cylinder. The material pushing screw is arranged in the inner cavity of the material conveying cylinder in a built-in mode, and performs circumferential rotation motion around the central axis of the material conveying cylinder under the action of the driving force of the second power part. The heating part is composed of a plurality of heaters which are sleeved on the material conveying cylinder and are uniformly distributed along the length direction of the material conveying cylinder. The die surface granulating device is arranged on one side of the machine table, and a feed inlet of the die surface granulating device is right corresponding to a discharge end of the feed delivery cylinder. The grain-cutting collecting unit is used for collecting nylon plastic particles produced by the die face grain-cutting device.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic perspective view of a nylon plastic pelletizer in accordance with the present invention.

FIG. 2 is a perspective view of the die face pelletizing apparatus of the present invention.

Fig. 3 is a perspective view of the housing of the die face pelletizing apparatus of the present invention.

Fig. 4 is a perspective view of a cutting part of the die face pelletizing apparatus of the present invention.

Fig. 5 is an exploded view of the cutting section of the die face pelletizer apparatus of the present invention.

Fig. 6 is a perspective view of a cutter head of the die face pelletizing apparatus of the present invention.

Fig. 7 is a perspective view of another perspective of a cutter disk in a die face pelletizing apparatus of this invention.

Fig. 8 is a top view of fig. 2.

Fig. 9 is a sectional view a-a of fig. 8.

1-a machine platform; 2-a material conveying cylinder; 3-feeding bin; 4-a second power section; 5-heating part; 51-a heater; 6-cutting grain collection unit; 7-die surface grain cutting device; 71-a housing; 711-a material cutting cavity; 712-a feed port; 713-discharge port; 714-annular mount; 7141-plug cavity; 72-a cutting portion; 721-a cutter head; 7211-a first threaded hole; 7212-inserting and matching counter bores; 722-a cutter assembly; 7221-bearing arm; 72211-external threads; 72212-card slot; 72213-second threaded hole; 7222-a cutter; 72221-mounting holes; 7223-locking screws; 7224-a locking nut; 73-a first power section; 731-motor; 732-a shaft; 733 — a bearing support assembly; 7331-left end cap; 7332-left mounted ball bearings; 7333 placing the end cap right; 7334-spacer bush; 7335 right-hand ball bearing.

Detailed Description

In the description of the present invention, it is to be understood that the terms "left", "right", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

The following description will be made in detail with reference to specific embodiments, and fig. 1 shows a schematic perspective view of a nylon plastic granulator according to the present invention, which mainly comprises a machine table 1, a material conveying cylinder 2, a feeding bin 3, a material pushing screw (not shown), a second power section 4, a heating section 5, a granule collection unit 6, and a die surface granule cutting device 7. Wherein, the material conveying cylinder 2 is horizontally arranged right above the machine table 1. The feeding bin 3 is detachably fixed on the material conveying cylinder 2, and correspondingly, a feeding hole for receiving the incoming material from the feeding bin 3 is formed in the material conveying cylinder 2. The pushing screw is arranged in the inner cavity of the material conveying cylinder 2 and rotates around the central axis thereof under the action of the driving force of the second power part 4. The heating unit 5 is composed of a plurality of heaters 51 which are sleeved on the feed cylinder 2 and are uniformly distributed along the length direction of the feed cylinder 2. The die surface granulating device 7 is arranged on one side of the machine table 1, and a feed inlet of the die surface granulating device corresponds to the discharge end of the feed delivery cylinder 2. The pellet collection unit 6 is used for collecting nylon plastic pellets produced by the die face pellet cutting device 7. The nylon plastic is melted in the conveying cylinder 2 under the action of heat of the heater 51, and is pushed into the grain cutting cavity of the die surface grain cutting device 7 under the action of extrusion force of the pushing screw to be cut into grains along with the die surface grain cutting device 7 so as to cut the nylon plastic strips into grains.

Here, it should be noted that: 1) the die surface granulating device 7 is also provided with a power part, so that the power part for driving the material pushing screw is named as a second power part 4, and the power part arranged in the die surface granulating device 7 is named as a first power part for the convenience of distinguishing from the name; 2) the length of the feed delivery cylinder 2 and the specific number of heaters 51 can be changed adaptively according to the design requirements and the types of the pretreated nylon plastics. And when the designed length of the material conveying cylinder 2 is too long, the material conveying cylinder can be designed into a split structure, namely, the material conveying cylinder is formed by splicing a plurality of sections of cylinders in a split mode.

Fig. 2, 8 and 9 show a perspective view, a plan view and a sectional view a-a of the die face pelletizer of the present invention, respectively, and it is understood that the die face pelletizer mainly includes a housing 71, a cutting section 72, a first power section 73 and the like. As shown in fig. 3, a cutting chamber 711 is provided in the housing 71. The left side wall and the lower side wall of the casing 71 are respectively provided with a feed inlet 712 and a discharge outlet 713 which are communicated with the material cutting cavity 711 in a one-to-one correspondence manner. The cutting portion 72 is built in the above-mentioned blank chamber 711, and is directly driven by the first power portion 73. It is important to note that as shown in fig. 4 and 5, the cutting portion 72 includes a cutter head 721, and 3 cutter assemblies 722. The cutter head 721 performs a circumferential rotational motion about its central axis by the driving force of the first power portion 73. The cutter assemblies 722 each include a force-bearing arm 7221, a cutter 7222, a retaining screw 7223, and a retaining nut 7224. 3 first threaded holes 7211 matched with the bearing arms 7221 are uniformly distributed on the outer side wall of the cutter head 721 around the circumference of the cutter head (as shown in fig. 6). An external thread 72211 matched with the first threaded hole 7211 is formed on the outer side wall of the bearing arm 7221 at a predetermined height from the lower end surface. A clamping groove 72212 matched with the thickness of the cutter 7222 extends downwards from the upper end surface of the bearing arm 7221, and at least one second threaded hole 72213 matched with the locking screw 7223 and communicated with the clamping groove is formed in the side wall of the bearing arm 7221. At least one mounting hole 72221 matched with the locking screw 7223 is arranged on the cutting knife 7222. After the cutter 7222 is in place relative to the catch 72212, the locking screw 7223 passes through the mounting hole 72221 via the second threaded hole 72213. When the force-bearing arm 7221 is screwed into place relative to the first threaded hole 7211, the retaining nut 7224 is screwed in the direction of the extension of the external thread 72211 until it comes into full abutment with the outer side wall of the cutter head 721.

After a period of operation, when a certain cutter 7222 is seriously worn or has a broken edge, only the replacement operation needs to be independently performed, and the rest cutters 7222 are still reserved, so that the maintenance cost of the die face granulating device 7 and the total investment time required by the replacement operation are effectively reduced. In addition, when the diameter of the material conveying cylinder 2 for molding the long-strip nylon plastic is changed, the extension length of the bearing arm 7221 can be adjusted according to actual conditions, namely, the change of the working radius of the cutter 7222 is realized, so that the precise alignment with the long-strip nylon plastic to be cut is better realized, and the grain cutting process is ensured to be executed efficiently and high-quality.

As can also be seen in fig. 4 and 5, the mounting hole 72221 is preferably an elongated kidney-shaped hole extending along the length of the cutter 7222. In this way, after a period of operation, when the amount of wear of the cutting end surface of a certain cutter 7222 is out of tolerance, only the locking screw 7223 needs to be loosened, a small distance is dragged along the length direction of the cutter 7222, it is ensured that the cutter 7222 and the adjacent cutter 7222 are all kept on the same cutting plane, and the locking screw 7223 is tightened again, so that the whole operation process is convenient and fast.

It is known that whether the cutting blade 7222 is fixed firmly by itself has a crucial influence on the smoothness of the cutting process and the service life of the cutting blade 7222, and in view of this, as a further optimization of the above technical solution, the number of the mounting holes 72221 provided on the cutting blade 7222 for tightening is set to 2 and arranged along the length direction of the cutting blade 7222.

As is known, the first power portion 73 may take various designs to achieve the driving of the cutter head 721, however, an embodiment with a simple design structure, which is easy to implement and facilitates the maintenance operation later is recommended here, as follows: as shown in fig. 8 and 9, the first power unit 73 is mainly composed of a motor 731, a rotating shaft 732, and a bearing support assembly 733. The motor 731 is disposed at the right side of the housing 71, and directly outputs a rotational torque to the rotating shaft 732. The cutter head 721 is inserted into the rotary shaft 732, and correspondingly, an insertion counter bore 7212 (as shown in fig. 7) is extended from the right end surface to the left to match the outer diameter of the rotary shaft 732. The bearing support assembly 733 is used for directly supporting the rotating shaft 732 and is embedded in the right sidewall of the housing 71. The bearing support assembly 733 includes a left end cap 7331, a left ball bearing 7332, a right end cap 7333, a spacer 7334, and a right ball bearing 7335. Correspondingly, as shown in FIG. 3, an annular mounting seat 714 extends inwardly from the right side wall of the housing 71. A mating cavity 7141 is formed within the annular mounting base 714. The left ball bearing 7332 and the right ball bearing 7335 are both disposed in the insertion cavity 7141 and are penetrated by the rotation shaft 732. The spacer 7334 is used to separate the left ball bearing 7332 from the right ball bearing 7335, and is sleeved on the rotating shaft 732. The left end cap 7331 is detachably fixed to the left sidewall of the annular mounting seat 714, and axially limits and pre-tensions the left ball bearing 7332. The right end cap 7333 is detachably fixed to the right side wall of the annular mounting seat 714, and axially limits and pre-tensions the right ball bearing 7335. The addition of the left ball bearing 7332 and the right ball bearing 7335 can not only effectively reduce the friction force applied to the rotating shaft 732 during the rotating process, and reduce the power consumption of the motor 731, but also improve the rotating stability of the rotating shaft 732, thereby ensuring that the rotating head 721 is always around the same axis during the rotating process, and the radial circular runout is maintained within a reasonable range.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. A die surface grain cutting device comprises a shell, a cutting part and a first power part; a material cutting cavity is arranged in the shell; a feed inlet and a discharge outlet which are communicated with the material cutting cavity are respectively arranged on the left side wall and the lower side wall of the shell in a one-to-one correspondence manner; the cutting part is arranged in the cutting cavity and driven by the first power part, and is characterized by comprising a cutter head and N cutter assemblies; the cutter head performs circumferential rotary motion around the central axis of the cutter head under the action of the driving force of the first power part; the cutter components comprise bearing arms, cutters, locking screws and locking nuts; n first threaded holes matched with the bearing arms are uniformly distributed on the outer side wall of the cutter head around the circumference of the cutter head; the outer side wall of the bearing arm is provided with a section of external thread matched with the first threaded hole at a preset height from the lower end surface of the bearing arm; a clamping groove matched with the cutter extends downwards from the upper end surface of the bearing arm, and the side wall of the clamping groove is provided with at least one second threaded hole matched with the locking screw and communicated with the clamping groove; the cutter is provided with at least one mounting hole matched with the locking screw; after the cutter is placed in position relative to the clamping groove, the locking screw penetrates through the mounting hole through the second threaded hole; and when the bearing arm is screwed in place relative to the first threaded hole, the locking nut is screwed along the external thread until the locking nut is completely attached to the outer side wall of the cutter head.

2. The die face pelletizing device of claim 1, wherein the mounting hole is an elongated kidney-shaped hole and extends along the length of the cutter.

3. The die face pelletizing apparatus according to claim 1, wherein the number of mounting holes is set to 2 for a single cutter and arranged along the width direction of the cutter.

4. The die face pelletizing device of any one of claims 1-3, wherein the first power section comprises a motor, a rotating shaft, and a bearing support assembly; the motor is arranged on the right side of the shell and outputs rotating torque to the rotating shaft; the cutter head is inserted and matched on the rotating shaft, and correspondingly, an insertion and matching counter bore matched with the outer diameter of the rotating shaft extends leftwards from the right end surface of the cutter head; the bearing supporting component is used for supporting the rotating shaft and is embedded on the right side wall of the shell.

5. The die face pelletizing device of claim 4, wherein the bearing support assembly comprises a left end cap, a left ball bearing, a right end cap, a spacer sleeve and a right ball bearing; an annular mounting seat extends inwards from the right side wall of the shell; an inserting and matching cavity is formed in the annular mounting seat; the left ball bearing and the right ball bearing are both arranged in the inserting and matching cavity and are penetrated by the rotating shaft; the spacer bush is used for separating the left ball bearing from the right ball bearing and sleeved on the rotating shaft; the left end cover is detachably fixed on the left side wall of the annular mounting seat and is used for axially limiting and pre-tightening the left ball bearing; the right end cover is detachably fixed on the right side wall of the annular mounting seat and is used for axially limiting and pre-tightening the right ball bearing.

6. A nylon plastic granulator is characterized by comprising a machine table, a material conveying cylinder, a feeding bin, a material pushing screw, a second power part, a heating part, a granulating and collecting unit and a die surface granulating device as claimed in any one of claims 1 to 5; the material conveying cylinder is horizontally arranged right above the machine table; the feeding bin is detachably fixed on the material conveying cylinder, and correspondingly, a feeding hole is formed in the material conveying cylinder; the material pushing screw is arranged in the inner cavity of the material conveying cylinder, and performs circumferential rotary motion around the central axis of the material conveying cylinder under the action of the driving force of the second power part; the heating part is composed of a plurality of heaters which are sleeved on the material conveying cylinder and are uniformly distributed along the length direction of the material conveying cylinder; the die surface grain cutting device is arranged on one side of the machine table, and a feed inlet of the die surface grain cutting device corresponds to a discharge end of the feed delivery cylinder; the grain-cutting collecting unit is used for collecting nylon plastic particles produced by the die face grain-cutting device.

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