Extruded plastic strip cooling device

Abstract

The utility model relates to an extruded plastic strip cooling device which comprises symmetrically arranged air injection devices, a cooling air duct is arranged between the air injection devices, each air injection device comprises an air storage chamber and an air injection chamber, the air storage chamber is provided with a compressed air inlet and is further communicated with the air injection chamber, and the air injection chamber is provided with an injection gap corresponding to the cooling air duct. The spraying gap is arranged in the direction of the cooling air channel. When the plastic master batch matrix resin is easy to hydrolyze or water-soluble, or the plastic master batch contains water-soluble components, the plastic master batch production device can ensure smooth production and product quality. Due to the adoption of high-speed airflow, the cooling distance is short, the cooling effect is good, the production line is more compact, and the space is saved.

Description

Technical Field

[0001] This utility model relates to a cooling device for extruded plastic strips, belonging to the field of plastic masterbatch production. Background Technology

[0002] Currently, the main processes for preparing plastic masterbatch include: mixing, screw melt extrusion into strips, water cooling, air drying, pelletizing, and baking. After water cooling, the extruded plastic strips generally undergo one or two more air drying processes, primarily using centrifugal fans.

[0003] The disadvantages are:

[0004] Existing water-cooling devices immerse plastic strips in water, transferring heat to the water to cool and solidify them. After air drying, the strips are then fed into the pelletizing device. While existing water-cooling technology is suitable for most plastics, it can negatively impact the production process or product quality when the plastic is easily hydrolyzed or water-soluble, or when the plastic masterbatch contains water-soluble components.

[0005] Causes:

[0006] This is because some masterbatch matrix resins use water-soluble materials such as PVA and PEG, which will dissolve directly in water when cooled with water, thus affecting the smooth progress of production; and when the masterbatch contains water-soluble additives, the additives will be lost in the water when cooled with water, thus affecting the actual use effect of the masterbatch. Utility Model Content

[0007] This invention addresses the issue that existing water-cooling methods are not suitable for the production of some plastic masterbatches by proposing an extruded plastic strip cooling device that enables the plastic strip to be cooled rapidly without affecting the actual performance of the masterbatch.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A cooling device for extruded plastic strips includes symmetrically arranged jet devices, with a cooling air duct between the jet devices. Each jet device includes an air storage chamber and a jet chamber. The air storage chamber is provided with a compressed air inlet and is also connected to the jet chamber. The jet chamber is provided with a jet gap corresponding to the cooling air duct, and the jet gap is arranged along the direction of the cooling air duct.

[0010] Furthermore, the cooling duct includes a funnel-shaped inlet and a funnel-shaped outlet.

[0011] Furthermore, an upper guide plate extends from the lower end of the horn-shaped feed inlet, and a lower guide plate extends from the upper end of the horn-shaped discharge outlet. The lower guide plate is located outside the upper guide plate, and the spray gap is formed between the upper guide plate and the lower guide plate.

[0012] Furthermore, it also includes steering guide wheels that guide the plastic strips into the next pelletizing process.

[0013] In summary, this utility model has the following advantages:

[0014] Compared with the existing device, the extruded plastic strip cooling device of this invention can ensure smooth production and product quality when the plastic masterbatch matrix resin is easily hydrolyzed or water-soluble, or when the plastic masterbatch contains water-soluble components.

[0015] This is because the present invention uses high-speed airflow cooling, which does not require the use of water for cooling and will not affect the water-soluble plastic matrix or additives.

[0016] Because of the use of high-speed airflow, the cooling distance is shorter, the cooling effect is better, and the production line is more compact and saves space. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a cooling device for extruded plastic strips according to the present invention.

[0018] in Figure 1 Including:

[0019] 1—Jet jet device; 2—Cooling air duct; 3—Air storage chamber; 4—Jet chamber; 5—Compressed air inlet; 6—Jet gap; 7—Feed inlet; 8—Discharge outlet; 9—Upper guide plate; 10—Lower guide plate; 11—Steering guide wheel; 12—Plastic strip. Detailed Implementation

[0020] The present invention will now be described in further detail.

[0021] like Figure 1 As shown, the extruded plastic strip cooling device of this utility model includes symmetrically arranged jet devices 1, with a cooling air duct 2 between the jet devices 1. The jet device 1 includes an air storage chamber 3 and a jet chamber 4. The air storage chamber 3 is provided with a compressed air inlet 5 and is connected to the jet chamber 4. The jet chamber 4 is provided with a jet gap 6 corresponding to the cooling air duct 2. The jet gap 6 is arranged along the direction of the cooling air duct 2.

[0022] The cooling air duct 2 includes a trumpet-shaped inlet 7 and a trumpet-shaped outlet 8. The lower end of the trumpet-shaped inlet 7 extends to an upper guide plate 9, and the upper end of the trumpet-shaped outlet 8 extends to a lower guide plate 10. The lower guide plate 10 is located outside the upper guide plate 9, and a spray gap 6 is formed between the upper guide plate 9 and the lower guide plate 10.

[0023] The working process of this utility model is as follows:

[0024] After extrusion, the plastic strip falls automatically under gravity and enters the device. The cooling device has a funnel-shaped slit inlet, and compressed air at 0.1-0.4 MPa enters the air storage chamber 3 from both sides. Then, it forms a jet airflow that moves rapidly downward through the jet gap 6 and is confined within the cooling duct 2. Due to the negative pressure effect of the jet airflow, the plastic strip is drawn into the cooling duct 2 and cooled and fixed after heat exchange with the high-speed airflow within the cooling duct 2. The cooled plastic strip is then turned by the guide wheel 11 and enters the next pelletizing process.

[0025] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A cooling device for extruded plastic strips, characterized in that: The device includes symmetrically arranged jet devices, with a cooling air duct between the jet devices. Each jet device includes an air storage chamber and a jet chamber. The air storage chamber is provided with a compressed air inlet and is also connected to the jet chamber. The jet chamber is provided with a jet gap corresponding to the cooling air duct, and the jet gap is arranged along the direction of the cooling air duct.

2. A cooling device for extruded plastic strips according to claim 1, characterized in that: The cooling duct includes a funnel-shaped inlet and a funnel-shaped outlet.

3. A cooling device for extruded plastic strips according to claim 2, characterized in that: The lower end of the horn-shaped feed inlet is extended with an upper guide plate, and the upper end of the horn-shaped discharge outlet is extended with a lower guide plate. The lower guide plate is located outside the upper guide plate, and the spray gap is formed between the upper guide plate and the lower guide plate.

4. A cooling device for extruded plastic strips according to claim 1, characterized in that: It also includes guide rollers that guide the plastic strips into the next pelletizing process.

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