CN219095853U - Novel screw mechanism and granulator - Google Patents

Abstract

The utility model discloses a novel screw mechanism and a granulator. The novel screw mechanism comprises a machine barrel and a screw, wherein the machine barrel is provided with a barrel cavity, and a thread gap is formed between two adjacent threads of the screw and the inner wall of the barrel cavity. The screw rod comprises a feeding section, a boosting section and a pressure stabilizing section which are sequentially connected, screw gaps formed in the feeding section, the boosting section and the pressure stabilizing section are respectively a first gap, a second gap and a third gap, the volume of the first gap is larger than that of the second gap, the volume of the second gap is larger than that of the third gap, and the volumes of a plurality of third gaps formed in the pressure stabilizing section are equal. Therefore, the materials are gradually further compressed and heated through the first gap, the second gap and the third gap, and the volumes of the third gaps formed in the pressure stabilizing section are equal, so that the materials can continuously keep the required smelting temperature when passing through the pressure stabilizing section, and the materials can be better converted from a solid state into a softened state or a molten state which can be extruded and molded.

Description

Novel screw mechanism and granulator

Technical Field

The utility model relates to the technical field of granulator, in particular to a novel screw mechanism and a granulator.

Background

The granulator is a device for re-crushing plastic products to form and outputting plastic granules. The plastic particle recycling device can recycle the plastic rim charge which is left and cannot be utilized in the industrial production process and the recycled plastic product, and output the plastic particle which can be reused, so that the pollution problem caused by discarding the plastic product can be relieved, and the recycling rate of the plastic can be improved.

However, in the pelleting machine in the prior art, the problem of uneven smelting after crushing the recycled plastic products exists in the production process, so that the extrusion and pelleting process of the pelleting machine is affected, and the produced plastic particles are uneven in quality. In view of this, the inventors have studied the prior art and have made the present application.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

It is a primary object of the present utility model to overcome at least one of the above-mentioned drawbacks of the prior art and to provide a novel screw mechanism and pelletizer.

In order to achieve the aim of the utility model, the utility model adopts the following technical scheme:

according to one aspect of the present utility model, a novel screw mechanism is provided. The novel screw mechanism comprises a machine barrel and a screw, wherein the machine barrel is provided with a barrel cavity, the screw is rotatably arranged in the barrel cavity, and a thread gap is formed between two adjacent threads of the screw and the inner wall of the barrel cavity;

the screw rod comprises a feeding section, a boosting section and a pressure stabilizing section which are sequentially connected, screw gaps formed in the feeding section, the boosting section and the pressure stabilizing section are respectively a first gap, a second gap and a third gap, the volume of the first gap is larger than that of the second gap, the volume of the second gap is larger than that of the third gap, and the volumes of a plurality of third gaps formed in the pressure stabilizing section are equal.

According to an embodiment of the utility model, the screw further comprises an extrusion section and a pressure relief section which are sequentially connected, the extrusion section is connected with the pressure stabilizing section, a screw thread gap formed in the extrusion section is a fourth gap, a screw thread gap formed in the pressure relief section is a fifth gap, the volume of the third gap is larger than that of the fourth gap, and the volume of the fourth gap is smaller than that of the fifth gap.

According to an embodiment of the present utility model, the screw further includes a pressure increasing section, the pressure increasing section is connected to the pressure releasing section, a screw gap formed in the pressure increasing section is a sixth gap, a depth of the fifth gap is greater than a depth of the sixth gap, and a width of the fifth gap is smaller than a width of the sixth gap.

According to an embodiment of the utility model, the helix angle of the pressure stabilizing section is smaller than the helix angle of the extrusion section.

According to an embodiment of the present utility model, among the first gap, the second gap, the third gap, the fourth gap, the fifth gap, and the sixth gap, a depth of the fifth gap is the largest.

According to an embodiment of the utility model, the barrel is provided with a vent hole communicating the fifth gap with the outside.

According to an embodiment of the utility model, the screw further comprises a reverse thread section provided with a thread having a direction of rotation opposite to that of the feed section, and the reverse thread section and the pressure increasing section are connected to both ends of the feed section, respectively.

According to an embodiment of the utility model, the barrel is provided with a feed opening for feeding, which feed opening corresponds to the feed section.

According to one embodiment of the utility model, the screw further comprises an extension section, wherein the extension section is positioned at the tail section of the screw, and the extension section outwards penetrates out of the cylinder cavity and is inserted into the net changing mechanism of the granulator.

According to one embodiment of the utility model, the water passing channel is arranged in the screw, external water can flow into the water passing channel and can be discharged from the water passing channel, and the water flowing into the water passing channel can cool the screw.

According to another aspect of the present utility model, a pelletizer includes a drive mechanism for driving rotation of a screw of the screw mechanism, a screw mechanism for cutting extruded material into pellets, and a cutter mechanism, which is any of the screw mechanisms described above.

According to the technical scheme, the novel screw mechanism and the granulator have the advantages that:

the novel screw mechanism can fully smelt the crushed plastic products, so that the smelted plastic products can be more uniform before being extruded and molded, the situation that some plastic products are not fully smelted is greatly reduced, the extrusion process of the plastic products into strips is facilitated, and meanwhile, the quality of the plastic granules after being cut into granules is more uniform.

Drawings

Various objects, features and advantages of the present utility model will become more apparent from the following detailed description of the preferred embodiments of the utility model, when taken in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the utility model and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout. Wherein:

fig. 1 is a schematic view showing a structure of a pelletizer according to an exemplary embodiment.

Fig. 2 is a schematic diagram of a novel screw mechanism according to an exemplary embodiment.

Fig. 3 is an exploded schematic view of a novel screw mechanism, shown according to an exemplary embodiment.

Fig. 4 is a schematic view of a screw according to an exemplary embodiment.

Fig. 5 is a schematic cross-sectional structure of a novel screw mechanism according to an exemplary embodiment.

Fig. 6 is a schematic view of a screw according to another exemplary embodiment.

Wherein reference numerals are as follows:

a 100-screw mechanism; 110-screw; 111-a water pipe; 120-barrel; 121-a feed inlet; 122-exhaust hole

200-a driving mechanism;

300-a blanking mechanism;

400-a frame mechanism;

500-net changing mechanism;

g0—reverse thread segments; g1-a feeding section; a G2-boost stage; g3-a voltage stabilizing section; g4-extrusion section; g5-a pressure release section; g6-a pressure increasing section; g7-extending the segment; j1-a first gap; j2-a second gap; j3-third gap; j4-fourth gap; j5-fifth gap; j6-sixth gap.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.

The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the utility model. One skilled in the relevant art will recognize, however, that the inventive aspects may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the utility model.

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present utility model. It will be apparent, however, to one skilled in the art that the utility model may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the utility model.

As shown in fig. 1, 2 and 3, the present embodiment provides a novel screw mechanism for use in a pelletizer, where the screw mechanism 100 includes a barrel 120 and a screw 110, the barrel 120 is provided with a barrel cavity, the screw 110 is rotatably disposed in the barrel cavity, and a thread gap is formed between two adjacent threads of the screw 110 and an inner wall of the barrel cavity. As shown in fig. 4 and 5, the screw 110 includes a feeding section G1, a boosting section G2, and a voltage stabilizing section G3, which are sequentially connected. The screw gaps formed in the feeding section G1, the boosting section G2 and the pressure stabilizing section G3 are a first gap J1, a second gap J2 and a third gap J3 respectively, the volume of the first gap J1 is larger than that of the second gap J2, the volume of the second gap J2 is larger than that of the third gap J3, and the volumes of a plurality of third gaps J3 formed in the pressure stabilizing section G3 are equal. The barrel 120 is provided with a feed port 121 for feeding, and the feed port 121 corresponds to the feed section G1.

When the recovered plastic product enters from the feed port 121, it reaches the first gap J1, and as the screw 110 rotates, it reaches the second gap J2 and the third gap J3 sequentially from the first gap J1. Since the volume of the first gap J1 is larger than the volume of the second gap J2, the volume of the second gap J2 is larger than the volume of the third gap J3. Therefore, the materials such as plastic products are compressed and heated from the first gap J1 to the second gap J2, the materials are further compressed and heated from the second gap J2 to the third gap J3, and the materials are heated to the required smelting temperature in the third gap J3. The term "melting temperature" as used herein means a temperature at which a material is softened or melted and satisfies the requirement of secondary extrusion. Because the volumes of the third gaps J3 formed in the pressure stabilizing section G3 are equal, the material continuously maintains the required smelting temperature when passing through the pressure stabilizing section G3, so that the material can be better converted from a solid state into a softened state or a molten state which can be extruded and formed.

As shown in fig. 3, 4 and 5, in this embodiment, the screw 110 further includes a compression section G4 and a pressure release section G5 connected in sequence, where the compression section G4 is connected to the pressure stabilizing section G3. And the cylinder 120 is provided with an exhaust hole 122 at a position corresponding to the pressure relief section G5, and the exhaust hole 122 is communicated with the fifth gap J5 and the outside. The screw gap formed in the extrusion section G4 is a fourth gap J4, the screw gap formed in the pressure relief section G5 is a fifth gap J5, and the volume of the third gap J3 is larger than the volume of the fourth gap J4, and the volume of the fourth gap J4 is smaller than the volume of the fifth gap J5. Because the volume of the third gap J3 is larger than that of the fourth gap J4, when the material enters the fourth gap J4 from the third gap J3, the temperature can be further high, and therefore the material can be further ensured to be sufficiently smelted and reach a softened state or a molten state. Since the volume of the fourth gap J4 is smaller than the volume of the fifth gap J5, the temperature will be slightly reduced when the material enters the fifth gap J5 from the fourth gap J4, and the pressure applied to the material from the fourth gap J4 to the fifth gap J5 will be reduced, so that the material will release the excessive gas in the fifth gap J5 and be discharged from the exhaust hole 122.

As shown in fig. 4 and 5, in the present embodiment, the screw 110 further includes a pressure increasing section G6, the pressure increasing section G6 is connected to the pressure releasing section G5, and a screw gap formed in the pressure increasing section G6 is a sixth gap J6. The volume of the fifth gap J5 is larger than the volume of the sixth gap J6, and the depth of the fifth gap J5 is larger than the depth of the sixth gap J6, and the width of the fifth gap J5 is smaller than the width of the sixth gap J6. When the material reaches the sixth gap J6 from the fifth gap J5, the material is compressed again and heated, so that the material is prepared finally before being extruded and molded. Because the depth of the fifth gap J5 is larger than that of the sixth gap J6, the width of the fifth gap J5 is smaller than that of the sixth gap J6, so that the sixth gap J6 can form a narrow flat space, and the material can be ejected out of the cylinder cavity under larger pressure.

As shown in fig. 4 and 5, the depth of the fifth gap J5 is the largest among the first gap J1, the second gap J2, the third gap J3, the fourth gap J4, the fifth gap J5, and the sixth gap J6. The pressure of the material in the fifth gap J5 can be further reduced, and the excess gas can be released in the pressure release section G5.

Further, as shown in fig. 3, 4 and 5, in the present embodiment, the helix angle of the extrusion section G4 is smaller than the helix angle of the steady-state section G3. Under this kind of structure, along with the rotation of screw rod 110, the material can be less than at the feed efficiency of steady voltage section G3 in extrusion section G4's passing efficiency, can lead to the material to be extruded by the material from steady voltage section G3 like this in extrusion section G4, can assist the material to rise at extrusion section G4 more efficient.

As shown in fig. 3, 4 and 5, in the present embodiment, the screw 110 further includes a reverse thread section G0, the reverse thread section G0 is provided with threads having a reverse direction to that of the feeding section G1, and the reverse thread section G0 and the pressure increasing section G2 are connected to both ends of the feeding section G1, respectively. Since the reverse thread G0 is provided with threads having a direction opposite to that of the discharge threads, the reverse thread G0 can effectively prevent the feed from being actively overflowed from the feed section G1 toward the reverse thread G0 when the screw 110 rotates the feed in the forward direction.

As shown in fig. 4 and 5, in this embodiment, the screw 110 further includes an extension section G7, where the extension section G7 is connected to the pressure increasing section G6, and the extension section G7 passes through the barrel cavity outwards and is inserted into the net replacing mechanism 500 of the pelletizer. The front end of the passing net of the net changing mechanism 500 is provided with a passing cavity, and the material from the passing cavity passes through the passing net and is extruded and divided into strips so as to be cut into grains later. After the granulator stops working, the material in the passing cavity can be cooled and hardened, and when the granulator works again, the material in the passing cavity is very likely to be pressed back to break the passing net. The screw 110 in this embodiment has an extension G7 extending into the passing cavity, and the extension G7 can greatly reduce the volume of the material in the passing cavity, thereby protecting the passing net.

In addition, as shown in fig. 6, in another embodiment, a water passage is built in the screw 110, and the screw 110 is provided with a water passage pipe 111, and the water passage pipe 111 is inserted at an end of the screw 110 and protrudes into the water passage. The water pipe 111 is further provided with a water inlet and a water outlet, and external water can flow into the water passage from the water inlet and be discharged from the water passage through the water outlet. Through the water channel, can cool down screw rod 110, can let screw rod mechanism be used for producing the lower material of fusing point like this, greatly increased screw rod mechanism's practical range has fine practicality.

As shown in fig. 1, the present embodiment also provides a pelletizer including a driving mechanism 200, a screw mechanism 100, a blanking mechanism 300, a frame mechanism 400 and a net changing mechanism 500. The driving mechanism 200, the screw mechanism 100 and the blanking mechanism 300 are supported on the frame mechanism 400, the driving mechanism 200 is used for driving the screw 110 of the screw mechanism 100 to rotate, the blanking mechanism 300 is used for cutting extruded materials into granules, and the screen changing mechanism 500 is provided with a screen through which the materials pass to form strips. Wherein the screw mechanism 100 is the screw mechanism 100 provided in the above embodiment.

In operation, the driving mechanism 200 drives the screw mechanism 100 to operate, the recovered plastic product is heated to a state capable of being extruded and formed, extruded materials can form a strip-shaped state after passing through the screen changing mechanism 500, and the strip-shaped materials are cut into particles by the cutting mechanism 300. It should be noted that, the driving mechanism 200, the blanking mechanism 300, the frame mechanism 400, and the screen changing mechanism 500 all belong to the prior art, and are not described herein.

The granulator provided by the embodiment can more fully smelt the crushed plastic products, so that the smelted plastic products can be more uniform before being extruded and molded, the situation that some plastic products are not fully smelted is greatly reduced, the process that the plastic products are extruded into strips is facilitated, and meanwhile, the quality of plastic granules after granulating is more uniform.

It should be appreciated that the various examples described above may be utilized in a variety of directions (e.g., tilted, inverted, horizontal, vertical, etc.) and in a variety of configurations without departing from the principles of the present utility model. The embodiments shown in the drawings are shown and described merely as examples of useful applications of the principles of the utility model, which are not limited to any specific details of these embodiments.

Of course, once the above description of the representative embodiments has been carefully considered, those skilled in the art will readily appreciate that numerous modifications, additions, substitutions, deletions, and other changes may be made to these specific embodiments, and such changes are within the scope of the principles of the present utility model. Accordingly, the foregoing detailed description is to be clearly understood as being given by way of illustration and example only, the spirit and scope of the present utility model being limited solely by the appended claims and equivalents thereto.

Claims (10)

1. The novel screw mechanism is used for a granulator and is characterized by comprising a machine barrel (120) and a screw (110), wherein the machine barrel (120) is provided with a barrel cavity, the screw (110) is rotatably arranged in the barrel cavity, and a thread gap is formed between two adjacent threads of the screw (110) and the inner wall of the barrel cavity;

the screw rod (110) is including feeding section (G1), boost section (G2) and steady voltage section (G3) that are connected in proper order, form in the screw thread clearance of feeding section (G1), boost section (G2) and steady voltage section (G3) is first clearance (J1), second clearance (J2) and third clearance (J3) respectively, just the volume of first clearance (J1) is greater than the volume of second clearance (J2), the volume of second clearance (J2) is greater than the volume of third clearance (J3), and form in a plurality of third clearance (J3) of steady voltage section (G3) are equal.

2. The novel screw mechanism according to claim 1, wherein the screw (110) further comprises a compression section (G4) and a pressure release section (G5) which are sequentially connected, the compression section (G4) is connected to the pressure stabilizing section (G3), a screw gap formed in the compression section (G4) is a fourth gap (J4), a screw gap formed in the pressure release section (G5) is a fifth gap (J5), and the volume of the third gap (J3) is larger than the volume of the fourth gap (J4), and the volume of the fourth gap (J4) is smaller than the volume of the fifth gap (J5).

3. The novel screw mechanism according to claim 2, wherein the screw (110) further comprises a pressure increasing section (G6), the pressure increasing section (G6) is connected to the pressure decreasing section (G5), a screw gap formed in the pressure increasing section (G6) is a sixth gap (J6), and a depth of the fifth gap (J5) is greater than a depth of the sixth gap (J6), and a width of the fifth gap (J5) is smaller than a width of the sixth gap (J6).

4. The novel screw mechanism as claimed in claim 2, characterized in that the helix angle of the extrusion section (G4) is smaller than the helix angle of the pressure stabilizing section (G3).

5. The novel screw mechanism as claimed in claim 2, wherein the barrel (120) is provided with a feed port (121) and an exhaust port (122), the feed port (121) corresponding to the feed section (G1), the exhaust port (122) communicating the fifth gap (J5) with the outside.

6. A novel screw mechanism according to claim 3, characterized in that the depth of the fifth gap (J5) is greatest among the first gap (J1), the second gap (J2), the third gap (J3), the fourth gap (J4), the fifth gap (J5) and the sixth gap (J6).

7. The novel screw mechanism according to claim 1, wherein the screw (110) further comprises a reverse thread section (G0), the reverse thread section (G0) being provided with threads having a direction of rotation opposite to that of the feed section (G1), the reverse thread section (G0) and the pressure increasing section (G2) being connected to both ends of the feed section (G1), respectively.

8. The novel screw mechanism of claim 1, wherein the screw (110) further comprises an extension (G7), the extension (G7) being located at a distal end of the screw (110), the extension (G7) extending outwardly out of the barrel cavity and being inserted into a screen changer (500) of the pelletizer.

9. The novel screw mechanism as claimed in claim 1, wherein a water passage is provided in the screw (110), external water can flow into the water passage and can be discharged from the water passage, and water flowing into the water passage can cool the screw (110).

10. A granulator comprising a drive mechanism (200), a screw mechanism (100) and a cutting mechanism (300), the drive mechanism (200) being configured to drive the screw (110) of the screw mechanism (100) to rotate, the cutting mechanism (300) being configured to cut extruded material into granules, characterized in that the screw mechanism (100) is a screw mechanism (100) according to any one of claims 1 to 8.

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