Master batch cooling and cutting mechanism

Abstract

The utility model discloses a cooling and cutting mechanism for master batches. The cooling and cutting mechanism comprises a feeding hopper, a spiral extrusion barrel, a receiving bin, a cooler, an annular bin, an annular extrusion die, a compression roller assembly, a rotary screw cap and a rotary motor, the material receiving bin is arranged at the discharging end of the spiral extrusion cylinder, a plurality of first extrusion holes are formed in the discharging end of the spiral extrusion cylinder, the cooler is arranged at the top of the material receiving bin, a plurality of second extrusion holes are formed in the annular material extrusion die in the circumferential direction, and the compression roller assembly is arranged on the inner wall of the annular material extrusion die. The cooler disclosed by the utility model can be used for cooling strip-shaped molten raw materials in the material receiving bin, so that the strip-shaped molten raw materials are solidified into a semi-flowing state and flow onto the annular material extruding die under the action of gravity, and the compression roller assembly can be used for extruding the cooled raw materials from the second extruding hole, so that the extruding efficiency of the raw materials is greatly improved; and the material cutter can cut the filamentous materials extruded from the second extrusion hole to form master batches along with the rotation of the rotary screw cap, and the pelletizing uniformity is high.

Description

Technical Field

[0001] The utility model relates to the field of masterbatch cutting, in particular to a masterbatch cooling and cutting mechanism. Background Art

[0002] In the process of producing plastic masterbatch, the material strips extruded by the granulator need to be cut for later packaging and secondary processing; masterbatch cutting machine is a general term for equipment or machines that cut strip or sheet plastics into granular materials. It is widely used to cut various thermoplastics and can cut material strips of a certain width and thickness into solid particles with good uniformity.

[0003] In the prior art, after the pelletizer extrusion mechanism extrude the molten material, the material still has a certain temperature, or even a molten flow state, which makes it difficult to shape during the pelletizing process. In addition, the cutter is in contact with the high-temperature material for a long time, and the surface temperature of the cutter becomes very high, which can easily cause damage to the cutter. In addition, the existing masterbatch cutting mechanism also has technical problems such as low pelletizing efficiency and uneven pelletizing size.

[0004] Therefore, the prior art has defects and needs to be improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a cooling and cutting mechanism for masterbatch with high cutting efficiency and uniform cutting size.

[0006] To achieve this purpose, the utility model adopts the following technical solutions: a cooling and cutting mechanism for masterbatch, including a feeding hopper, a spiral extrusion cylinder, a receiving bin, a cooler, an annular bin, an annular extrusion die, a pressure roller assembly, a rotary cover and a rotating motor;

[0007] The feed hopper is connected to the spiral extruder to hold the raw materials to be granulated;

[0008] The material receiving bin is arranged at the discharge end of the spiral extruder, and the discharge end is accommodated in the material receiving bin. The discharge end of the spiral extruder has a plurality of first extrusion holes, and the first extrusion holes are used to extrude the strip-shaped molten raw material.

[0009] The cooler is arranged on the top of the receiving bin to cool the strip molten raw material in the receiving bin;

[0010] The annular material bin is arranged at the side end of the material receiving bin away from the spiral extruder, and the height of the material receiving bin gradually decreases along the direction toward the annular material bin;

[0011] The annular extrusion die is arranged in the annular silo, and the annular extrusion die is provided with a plurality of second extrusion holes along the circumferential direction. The pressing roller assembly is arranged on the inner wall of the annular extrusion die and is connected to the rotating motor. The rotating motor is used to drive the pressing roller assembly to rotate along the inner wall of the annular extrusion die to extrude the cooled molten raw material from the second extrusion holes.

[0012] The side end of the annular material bin away from the material receiving bin has an opening, and the rotary cover is connected to the output shaft of the rotating motor and blocks the opening;

[0013] The rotary cover is provided with a cutting knife, and the cutting knife is located on the outer side of the annular extrusion die, so as to cut the filamentary material extruded from the second extrusion hole into master particles as the rotary cover rotates. The annular silo is provided with a discharge hopper, and the discharge hopper is used to discharge the master particles.

[0014] According to the above technical solution, in the cooling and cutting mechanism of the masterbatch, the pressure roller assembly includes a connecting shaft, a mounting frame and a pressure roller wheel;

[0015] The connecting shaft is connected to the middle part of the mounting frame, and the connecting shaft is connected to the output shaft of the rotating motor to rotate with the rotation of the rotating motor. The three pressure rollers are respectively sleeved on the mounting frame, and the pressure rollers are in contact with the inner wall of the annular extrusion die.

[0016] By adopting the above-mentioned technical solutions, the cooling and cutting mechanism of the masterbatch further includes a strip-cutting scraper, which is arranged at the outer end of the connecting shaft to cut the strip-shaped molten raw materials in the receiving bin into segments.

[0017] By adopting the above-mentioned technical solutions, in the cooling and cutting mechanism of the masterbatch, the wall thickness of the annular extrusion die is 6-30 mm.

[0018] By adopting the above-mentioned technical solutions, in the cooling and cutting mechanism of the masterbatch, the aperture of the second extrusion hole is smaller than the aperture of the first extrusion hole.

[0019] By adopting the above-mentioned technical solutions, in the cooling and cutting mechanism of the masterbatch, the pressing roller is made of rubber material.

[0020] By adopting the above-mentioned technical solutions, in the cooling and cutting mechanism of the masterbatch, the distance between the cutting knife and the annular extrusion die is 4-10 mm.

[0021] By adopting the above-mentioned technical solutions, the cooling and cutting mechanism of the masterbatch further includes a material collection system, and the material collection system includes a blower, a funnel, a feeding pipe and a material collection barrel;

[0022] The funnel is located below the discharge hopper, and the funnel is connected to the feeding pipe to discharge the master particles dropped from the discharge hopper into the feeding pipe. The blower is connected to one end of the feeding pipe, and the collecting barrel is connected to the other end of the feeding pipe. The blower is used to generate wind to blow the master particles in the feeding pipe into the collecting barrel for collection.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The utility model can be used to hold the raw materials to be granulated, the spiral extruder can heat the raw materials to a molten state, and convey the molten raw materials to the first extrusion hole through the spiral conveying action, the first extrusion hole can extrude the molten raw materials into a strip shape into a receiving bin, the cooler can cool the strip molten raw materials in the receiving bin to reduce the temperature, solidify them into a semi-fluid state and flow them into the annular extrusion die under the action of gravity, the pressure roller assembly can be driven by the rotating motor and rotated along the inner wall of the annular extrusion die to extrude the cooled raw materials from the second extrusion hole, greatly improving the extrusion efficiency of the raw materials, the cutting knife can cut the filamentary material extruded from the second extrusion hole into master pellets as the rotary cover rotates, and discharge them from the discharge hopper of the annular bin, and because the distance between the cutting knife and the annular extrusion die is a fixed value, the size of the cut master pellets is more uniform; it has the beneficial effects of high pelletizing efficiency and uniform pelletizing size. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0027] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the discharge end of the spiral extruder of the utility model;

[0029] Figure 3 This is a schematic diagram of the installation structure of the annular extrusion die of the utility model;

[0030] Figure 4 This is a schematic diagram of the material receiving bin structure of the utility model;

[0031] Figure 5 This is a schematic diagram of the annular silo structure of the utility model;

[0032] Figure 6 This is a schematic diagram of the rotary cover structure of the utility model;

[0033] Figure 7 This is a schematic diagram of the installation structure of the pressure roller assembly of the utility model. DETAILED DESCRIPTION

[0034] In order to make the utility model's purpose, features, and advantages more obvious and easy to understand, the following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the embodiments described below are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0036] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0037] like Figures 1 to 7 As shown, the embodiment of the utility model provides a cooling and cutting mechanism for masterbatch, including a feed hopper 1, a spiral extruder 2, a receiving bin 3, a cooler 4, an annular bin 5, an annular extrusion die 6, a pressure roller assembly 7, a rotary cover 8 and a rotating motor 9;

[0038] The feed hopper 1 is connected to the spiral extrusion barrel 2 to hold the raw materials to be granulated; the receiving bin 3 is arranged at the discharge end of the spiral extrusion barrel 2, and the discharge end is accommodated in the receiving bin 3, and the discharge end of the spiral extrusion barrel 2 has a plurality of first extrusion holes 21, and the first extrusion holes 21 are used to extrude strip-shaped molten raw materials; the feed hopper 1 can hold the raw materials to be granulated, and the spiral extrusion barrel 2 has a heating device, which can heat the raw materials to a molten state, and transport the molten raw materials to the first extrusion holes 21 through the spiral conveying action, and the first extrusion holes 21 can extrude the molten raw materials into the receiving bin 3 in the shape of strips.

[0039] like Figures 1 to 4 As shown, the cooler 4 is arranged on the top of the receiving bin 3 to cool the strip molten raw material in the receiving bin 3; the annular bin 5 is arranged at the side end of the receiving bin 3 away from the spiral extrusion cylinder 2, and the height of the receiving bin 3 gradually decreases along the direction toward the annular bin 5; the annular extrusion die 6 is arranged in the annular bin 5, and the annular extrusion die 6 is provided with a plurality of second extrusion holes 61 along the circumferential direction, the pressure roller assembly 7 is arranged on the inner wall of the annular extrusion die 6, and is connected to the rotating motor 9, the rotating The motor 9 is used to drive the pressure roller assembly 7 to rotate along the inner wall of the annular extrusion die 6 to extrude the cooled molten raw material from the second extrusion hole 61; the cooler 4 can cool the strip molten raw material in the docking silo 3 to reduce the temperature, solidify it into a semi-fluid state and flow to the annular extrusion die 6 under the action of gravity. The pressure roller assembly 7 can be driven by the rotating motor 9 to rotate along the inner wall of the annular extrusion die 6 to extrude the cooled raw material from the second extrusion hole 61, greatly improving the extrusion efficiency of the raw material. It should be noted that in this embodiment, the cooler 4 is a heat dissipation fan.

[0040] like Figures 3 to 6 As shown, the side end of the annular silo 5 away from the receiving silo 3 has an opening 51, the rotary cover 8 is connected to the output shaft of the rotary motor 9 and is blocked at the opening 51; the rotary cover 8 is provided with a cutting knife 81, and the cutting knife 81 is located on the outside of the annular extrusion die 6, so as to cut the filamentary material extruded from the second extrusion hole 61 into master particles as the rotary cover 8 rotates, and the annular silo 5 is provided with a discharge hopper 52, which is used to discharge the master particles. The cutting knife 81 can cut the filamentary material extruded from the second extrusion hole 61 into master particles as the rotary cover 8 rotates, and discharge them from the discharge hopper 52 of the annular silo 5. It should be noted that since the distance between the cutting knife 81 and the annular extrusion die 6 is a fixed value, the size of the cut master particles is more uniform.

[0041] like Figure 3 and Figure 7As shown, further, the pressure roller assembly 7 includes a connecting shaft 71, a mounting frame 72 and a pressure roller wheel 73; the connecting shaft 71 is connected to the middle of the mounting frame 72, and the connecting shaft 71 is connected to the output shaft of the rotary motor 9 to rotate with the rotation of the rotary motor 9, and the three pressure roller wheels 73 are respectively sleeved on the mounting frame 72, and the pressure roller wheels 73 abut against the inner wall of the annular extrusion die 6. When the pressure roller wheel 73 rolls on the inner wall of the annular extrusion die 6, a certain pressure can be applied to the raw material, so that the raw material is extruded through the second extrusion hole 61 to the desired shape and size, thereby improving the density and uniformity of the pelletized particles.

[0042] like Figure 6 As shown, further, a strip cutting scraper 74 is included, and the strip cutting scraper 74 is arranged at the outer end of the connecting shaft 71, so as to cut the strip molten raw material in the receiving bin 3. The strip cutting scraper 74 is located at the outer end of the connecting shaft 71, and can rotate with the rotation of the rotating motor 9, so as to cut the strip molten raw material in the receiving bin 3, so that it can smoothly enter the annular extrusion die 6 for secondary extrusion.

[0043] Furthermore, the wall thickness of the annular extrusion die 6 is 6-30 mm. In this embodiment, the wall thickness of the annular extrusion die 6 is 16 mm, that is, the depth of the second extrusion hole 61 is 16 mm.

[0044] Furthermore, the aperture of the second extrusion hole 61 is smaller than the aperture of the first extrusion hole 21. The smaller aperture can improve the extrusion uniformity of the masterbatch, and after being extruded from the first extrusion hole 21, the second extrusion through the second extrusion hole 61 can be performed to more evenly distribute the raw materials and improve the uniformity of the masterbatch product.

[0045] Furthermore, the pressure roller 73 is made of rubber material. The pressure roller 73 made of rubber material is relatively soft, which can effectively protect the surface of the annular extrusion die 6 from damage or scratches, maintain the smoothness of the surface of the annular extrusion die 6, and allow the raw materials to flow better on the annular extrusion die 6. It should be noted that the surface of the pressure roller 73 has an anti-skid groove 731 to increase the rolling friction between it and the annular extrusion die 6.

[0046] Furthermore, the distance between the cutting knife 81 and the annular extrusion die 6 is 4-10 mm. In this embodiment, the distance between the cutting knife 81 and the annular extrusion die 6 is 6 mm, that is, the cutting length of the masterbatch is 6 mm.

[0047] like Figure 1As shown, further, a collection system 10 is included, and the collection system 10 includes a blower 101, a hopper 102, a feeding pipe 103 and a collection barrel 104; the funnel 102 is located below the discharge hopper 52, and the funnel 102 is connected to the feeding pipe 103 to discharge the masterbatch falling from the discharge hopper 52 into the feeding pipe 103, the blower 101 is connected to one end of the feeding pipe 103, and the collection barrel 104 is connected to the other end of the feeding pipe 103, and the blower 101 is used to generate wind to blow the masterbatch in the feeding pipe 103 into the collection barrel 104 for collection. The collection system 10 can automatically collect and transport the masterbatch, reduce the tediousness of manual operation, and greatly improve the collection efficiency of the masterbatch after cutting.

[0048] The feed hopper 1 of the utility model can hold the raw material to be granulated, the spiral extruder 2 can heat the raw material to a molten state, and convey the molten raw material to the first extrusion hole 21 through a spiral conveying action, the first extrusion hole 21 can extrude the molten raw material into a strip shape into the receiving bin 3, the cooler 4 can cool the strip molten raw material in the receiving bin 3 to reduce the temperature, solidify it into a semi-fluid state and flow into the annular extrusion die 6 under the action of gravity, the pressure roller assembly 7 can be driven by the rotating motor 9 and rotated along the inner wall of the annular extrusion die 6 to extrude the cooled raw material from the second extrusion hole 61, greatly improving the extrusion efficiency of the raw material, the cutting knife 81 can cut the filamentary material extruded from the second extrusion hole 61 with the rotation of the rotary cover 8 to form master pellets, and discharge them from the discharge hopper 52 of the annular bin 5, because the distance between the cutting knife 81 and the annular extrusion die 6 is a fixed value, so that the size of the cut master pellets is more uniform; it has the beneficial effects of high pelletizing efficiency and uniform pelletizing size.

[0049] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A cooling and cutting mechanism for masterbatch, characterized in that: It includes a feeding hopper, a spiral extruder, a receiving bin, a cooler, an annular bin, an annular extrusion die, a pressure roller assembly, a rotary cover and a rotating motor; The feed hopper is connected to the spiral extruder to hold the raw materials to be granulated; The material receiving bin is arranged at the discharge end of the spiral extruder, and the discharge end is accommodated in the material receiving bin. The discharge end of the spiral extruder has a plurality of first extrusion holes, and the first extrusion holes are used to extrude the strip-shaped molten raw material. The cooler is arranged on the top of the receiving bin to cool the strip molten raw material in the receiving bin; The annular material bin is arranged at the side end of the material receiving bin away from the spiral extruder, and the height of the material receiving bin gradually decreases along the direction toward the annular material bin; The annular extrusion die is arranged in the annular silo, and the annular extrusion die is provided with a plurality of second extrusion holes along the circumferential direction. The pressing roller assembly is arranged on the inner wall of the annular extrusion die and is connected to the rotating motor. The rotating motor is used to drive the pressing roller assembly to rotate along the inner wall of the annular extrusion die to extrude the cooled molten raw material from the second extrusion holes. The side end of the annular material bin away from the material receiving bin has an opening, and the rotary cover is connected to the output shaft of the rotating motor and blocks the opening; The rotary cover is provided with a cutting knife, and the cutting knife is located on the outer side of the annular extrusion die, so as to cut the filamentary material extruded from the second extrusion hole into master particles as the rotary cover rotates. The annular silo is provided with a discharge hopper, and the discharge hopper is used to discharge the master particles.

2. The cooling and cutting mechanism for masterbatch according to claim 1, characterized in that: The pressure roller assembly comprises a connecting shaft, a mounting frame and a pressure roller wheel; The connecting shaft is connected to the middle part of the mounting frame, and the connecting shaft is connected to the output shaft of the rotating motor to rotate with the rotation of the rotating motor. The three pressure rollers are respectively sleeved on the mounting frame, and the pressure rollers are in contact with the inner wall of the annular extrusion die.

3. The cooling and cutting mechanism for masterbatch according to claim 2, characterized in that: It also includes a strip cutting scraper, which is arranged at the outer end of the connecting shaft and is used to cut the strip-shaped molten raw materials in the receiving bin into sections.

4. The cooling and cutting mechanism for masterbatch according to claim 1, characterized in that: The wall thickness of the annular extrusion die is 6-30 mm.

5. The cooling and cutting mechanism for masterbatch according to claim 1, characterized in that: The diameter of the second extrusion hole is smaller than the diameter of the first extrusion hole.

6. The cooling and cutting mechanism for masterbatch according to claim 2, characterized in that: The pressing roller is made of rubber material.

7. The cooling and cutting mechanism for masterbatch according to claim 1, characterized in that: The distance between the cutting knife and the annular extrusion die is 4-10 mm.

8. The cooling and cutting mechanism for masterbatch according to claim 1, characterized in that: Also included is a material collection system, which includes a blower, a hopper, a feeding pipe and a material collection barrel; The funnel is located below the discharge hopper, and the funnel is connected to the feeding pipe to discharge the master particles dropped from the discharge hopper into the feeding pipe. The blower is connected to one end of the feeding pipe, and the collecting barrel is connected to the other end of the feeding pipe. The blower is used to generate wind to blow the master particles in the feeding pipe into the collecting barrel for collection.

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