Melt extruder for producing low-smoke halogen-free particles

Abstract

The utility model discloses a melt extruder for producing low-smoke halogen-free particles, which comprises an extruder body, an extruder die head and a particle cutting mechanism, and the extruder body is provided with a dispersion cooling component below the extruder die head. Compared with the prior art, the low-smoke halogen-free particle production extruder disclosed by the utility model has the beneficial effects that the material receiving box and the cooling channel are arranged below the die head of the extruder, and the particle dispersing mechanism is driven by the motor in the working process, so that cut particles are dispersed and cooled in time. The contact and temperature among the particles are effectively reduced, and adhesion caused by contact is avoided, so that the quality and yield of the particles are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of extruders, in particular to a melt extruder for producing low-smoke halogen-free particles. Background Art

[0002] The principle of the extruder is to heat the material into a molten state through high temperature, and then extrude it into shape under the action of the screw. In order to process the material into different shapes, different die heads are usually installed at the discharge port of the extruder. For example, when producing low-smoke halogen-free particles, in order to process the material into particles, many round holes are opened on the die head, and a cutting device is set on the outside of the die head. In this way, the material will be cut into particles by the cutting device when it is extruded through the round holes of the die head.

[0003] However, the material is heated to a molten state in the extruder. Although it is close to a solid state when it is just extruded, it still has a certain viscosity because it has not been completely cooled. In order to prevent the particles from sticking to each other during extrusion, the particle melt extruder in the prior art usually uses a fan to cool the particles directly. For example, the utility model patent with application number 202320092270.4 discloses a polypropylene wax granulation mechanism, in which fan blades are arranged at the extrusion port, and the particles are cooled by the rotation of the fan blades to prevent adhesion.

[0004] The inventor believes that the particles will fall down soon after being cut, and the direct blowing of a fan has a short effect time, and the particles will still pile up after falling. Even if a fan is used to blow from above, it can only act on the surface of the particles accumulated on the upper layer, and the anti-adhesion effect is not very ideal. Utility Model Content

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a melt extruder for producing low-smoke halogen-free particles to solve the above problems.

[0006] To achieve the above-mentioned purpose, the utility model discloses a melt extruder for producing low-smoke halogen-free particles, comprising an extruder body, an extruder die head and a particle cutting mechanism, wherein the extruder body is provided with a dispersion cooling assembly below the extruder die head, and the dispersion cooling assembly comprises a receiving box fixedly arranged below the extruder die head for collecting particles, a plurality of cooling channels arranged on the inner wall of the receiving box, a feed port and a discharge port arranged at the upper and lower ends of the cooling channel, and a dispersion mechanism arranged at the upper end of the receiving box for dispersing particles into the feed ports of the plurality of cooling channels.

[0007] Preferably, the upper ends of the plurality of cooling channels are connected via an annular circular groove, and the connection between the annular circular groove and the feed opening at the upper end of the cooling channel is a funnel-shaped structure.

[0008] Preferably, a spiral slide structure is fixedly provided in the cooling channel.

[0009] Preferably, a vibration exciter is fixed to the annular groove.

[0010] Preferably, a fan is fixedly mounted on the extruder body, and an air outlet of the fan is connected to the inside of the lower end of the cooling channel.

[0011] Preferably, the dispersing mechanism includes a motor fixed at the upper end of the material receiving box, a tray fixedly connected to the output shaft of the motor, and a partition fixed on the surface of the tray, and the partition is arranged in an array around the center of the tray.

[0012] Preferably, the dispersing mechanism includes a motor fixed at the upper end of the material receiving box, a receiving hopper fixedly connected to the motor output shaft for receiving particles below the extruder die head, and a spreading pipe connected to the side of the lower end of the material receiving port, and the spreading pipe points to the upper end of the mouth of the annular groove.

[0013] Preferably, a material receiving hopper is fixed at the lower end of the material receiving box.

[0014] Compared with the prior art, the utility model has the following benefits: the utility model low-smoke halogen-free pellet production extruder realizes timely dispersion and cooling of the cut pellets by arranging a material receiving box and a cooling channel under the die head of the extruder, and a pellet dispersion mechanism driven by a motor during operation, which effectively reduces the contact and temperature between pellets, avoids adhesion caused by contact, and thus ensures the quality and yield of pellets. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0017] Figure 2 This is another three-dimensional structural schematic diagram of the utility model.

[0018] Figure 3 It is a schematic diagram of the structure of the utility model from top view.

[0019] Figure 4 It is a side structural schematic diagram of the utility model.

[0020] Figure 5 It is a schematic diagram of the connection structure between the cooling channel and the annular circular groove of the utility model.

[0021] In the figure: 1. Extruder body; 2. Extruder die head; 3. Particle cutting mechanism; 4. Material receiving box; 5. Cooling channel; 51. Feed inlet; 52. Discharge outlet; 53. Slide structure; 6. Dispersion mechanism; 61. Motor; 62. Tray; 63. Partition; 7. Annular groove; 8. Vibrator; 9. Fan; 10. Receiving hopper. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-5 The specific implementation modes of the present utility model are further described in detail.

[0023] The utility model discloses a melt extruder for producing low-smoke halogen-free particles, comprising an extruder body 1, an extruder die head 2 and a particle cutting mechanism 3. When in use, low-smoke halogen-free raw materials such as epoxy resin, alkyl silicone oil, etc. are added into the extruder body 1 through a hopper for melting, and the melted materials are extruded through the extruder die head 2 at the front end of the extruder body 1. The melted materials are cooled when passing through the extruder die head 2 to form a solid state, and are cut into particles by the particle cutting mechanism 3. The above structure is a common extruder structure, so in this embodiment, it is not described in detail. The key improvement of this embodiment is that the extruder body 1 is provided with a dispersion cooling component below the extruder die head 2, and the function of the dispersion cooling component is to disperse and then cool the cut particles, thereby effectively preventing the particles that have not been completely cooled from sticking to each other.

[0024] In this embodiment, the dispersion cooling assembly includes a material receiving box 4 fixedly arranged below the extruder die head 2 for collecting particles, a plurality of cooling channels 5 arranged on the inner wall of the material receiving box 4 for cooling the particles, a feed port 51 and a discharge port 52 arranged at the upper and lower ends of the cooling channel 5 for feeding and discharging particles, and a dispersion mechanism 6 arranged at the upper end of the material receiving box 4 for dispersing particles into the feed ports 51 of the plurality of cooling channels 5. When working, the particles cut by the particle cutting mechanism 3 fall on the dispersion mechanism 6, and the particles are dispersed by the dispersion mechanism 6. Dispersed into several cooling channels 5, the particles that have not been completely cooled are dispersed through the dispersion mechanism 6 to prevent the particles from sticking to each other. The extruder body 1 is fixedly equipped with a fan 9, and the air outlet of the fan 9 is connected to the lower end of the cooling channel 5 through a connecting pipe 91. The fan 9 blows air into the cooling channel 5 from bottom to top through the connecting pipe 91, so that the dispersed particles are cooled in different cooling channels 5. It can be understood that the wind force of the fan 9 should be less than the weight of the particles so that the particles can be discharged smoothly from the discharge port 52.

[0025] Furthermore, the upper ends of the plurality of cooling channels 5 are connected via an annular circular groove 7 , and the connection between the annular circular groove 7 and the feed port 51 at the upper end of the cooling channel 5 is a funnel-shaped structure.

[0026] In order to prolong the residence time of the particles in the cooling channel 5, a spiral slide structure 53 is fixedly provided in the cooling channel 5. In this way, after the particles enter the cooling channel 5, they will slowly roll downward through the slide structure 53 under the action of their own gravity and the wind resistance of the fan 9, and will be fully cooled during the rolling process.

[0027] The annular groove 7 is fixed with a vibrator 8, and the function of the vibrator 8 is to drive the annular groove 7 to vibrate, so that the particles in the annular groove 7 can automatically enter the cooling channel 5 through the funnel-shaped structure connected to the feed port 51. In addition, the high-frequency vibration of the vibrator 8 can also effectively vibrate and disperse the particles that are stuck together.

[0028] The following is a specific embodiment of the dispersion mechanism 6:

[0029] It includes a motor 61 fixed on the upper end of the material receiving box 4, a tray 62 fixedly connected to the output shaft of the motor 61, and a partition 63 fixed on the surface of the tray 62. The partition 63 is arranged in an array around the center of the tray 62. The motor 61 can drive the tray 62 to rotate. During operation, the cut material particles fall on the surface of the rapidly rotating tray 62. After being pushed by the partition 63, the particles make centrifugal motion around the center of the tray 62. Under the action of centrifugal force, the particles are thrown out from the side of the tray 62 and fall into the annular groove 7.

[0030] A receiving hopper 10 is fixed at the lower end of the receiving box 4 . The particles are dispersed into a plurality of cooling channels 5 , and then fully cooled. The particles are discharged into the receiving hopper 10 through the discharge port 52 , and then discharged downwards through the receiving hopper 10 .

[0031] The utility model discloses a low-smoke zero-halogen pellet production extruder, which disperses and cools the cut low-smoke zero-halogen pellets by arranging a dispersion cooling component, a cooling channel, etc., so as to effectively control the adhesion between pellets and improve the pellet quality.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A melt extruder for producing low-smoke halogen-free pellets, comprising an extruder body (1), an extruder die head (2) and a pellet cutting mechanism (3), characterized in that: The extruder body (1) is provided with a dispersion cooling assembly located below the extruder die head (2), and the dispersion cooling assembly comprises a material receiving box (4) fixedly arranged below the extruder die head (2) for collecting particles, a plurality of cooling channels (5) arranged on the inner wall of the material receiving box (4), a feed port (51) and a discharge port (52) arranged at the upper and lower ends of the cooling channels (5), and a dispersion mechanism (6) arranged at the upper end of the material receiving box (4) for dispersing particles into the feed ports (51) of the plurality of cooling channels (5).

2. A melt extruder for producing low-smoke zero-halogen particles according to claim 1, characterized in that: The upper ends of the plurality of cooling channels (5) are connected via an annular circular groove (7), and the connection between the annular circular groove (7) and the feed opening (51) at the upper end of the cooling channel (5) is a funnel-shaped structure.

3. A melt extruder for producing low-smoke zero-halogen particles according to claim 1, characterized in that: A spiral slide structure (53) is fixedly provided in the cooling channel (5).

4. A melt extruder for producing low-smoke zero-halogen particles according to claim 2, characterized in that: The annular groove (7) is fixed with a vibration exciter (8).

5. The melt extruder for producing low-smoke zero-halogen particles according to claim 1, characterized in that: The extruder body (1) is fixedly mounted with a fan (9), and an air outlet of the fan (9) is connected to the interior of the lower end of the cooling channel (5).

6. A melt extruder for producing low-smoke zero-halogen particles according to claim 2, characterized in that: The dispersion mechanism (6) comprises a motor (61) fixed to the upper end of the material receiving box (4), a tray (62) fixedly connected to the output shaft of the motor (61), and a partition (63) fixed to the surface of the tray (62), wherein the partition (63) is arranged in an array around the center of the tray (62).

7. A melt extruder for producing low-smoke zero-halogen particles according to claim 2, characterized in that: A material receiving hopper (10) is fixed at the lower end of the material receiving box (4).

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