Drying device for bio-based plastic processing

Abstract

The utility model relates to the technical field of plastic processing, and particularly discloses a drying device for bio-based plastic processing, which comprises a material storage barrel, a fan and a heater, the top of the material storage barrel is connected with a cover plate, the cover plate is provided with a feed port, the bottom of the material storage barrel is connected with a conical bottom barrel, the bottom of the bottom barrel is connected with a valve, and the valve is connected with the heater. An air outlet of the draught fan is connected with an air inlet of the heater, an air outlet of the heater is connected with the side portion of the bottom cylinder through a pipeline, a filter cone is installed in the material storage cylinder, a discharging opening is formed in the bottom of the filter cone, an auxiliary ventilation pipe is longitudinally arranged in the material storage cylinder, the top of the auxiliary ventilation pipe is closed, and the top of the auxiliary ventilation pipe is provided with an air outlet. A plurality of ventilation holes are evenly distributed in the side wall of the auxiliary ventilation pipe, a lifting device is installed on the cover plate, the auxiliary ventilation pipe is connected with the lifting end of the lifting device, an existing hot air type drying machine is improved, and the drying speed can be effectively increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastics processing, especially to a drying device for bio -based plastics processing. BACKGROUND

[0002] Bio -based plastics such as PLA and PHA etc. show great potential in the injection molding field due to its excellent processing performance and biodegradability. This kind of material is easy to process, and can adjust the injection molding parameters according to the product design requirements, realize the accurate forming of complex shape.

[0003] Before the bio -based plastics are sent into the injection molding machine, the plastic particles need to be dried to avoid the influence of moisture in the plastic particles on injection molding. In the injection molding factory, the hot air type drying machine is the most common drying equipment, and its specific structure can refer to CN217210130U. The drying equipment disclosed in the above patent, hot air can only be blown from bottom to top, and the drying speed is not fast enough. And, a valve mechanism needs to be set below the isolation plate, and the structure is relatively complex, which needs to be improved. UTILITY MODEL CONTENT

[0004] To solve the problems mentioned in the background art, the purpose of the utility model is to provide a drying device for bio -based plastics processing.

[0005] In order to achieve the above target, the technical scheme of the utility model is as follows:

[0006] A drying device for bio -based plastics processing, including storage cylinder, fan and heater, the top of the storage cylinder is connected with the cover plate, the cover plate is provided with the feed inlet, the bottom of the storage cylinder is connected with the bottom cylinder of taper, the bottom of the bottom cylinder is connected with the valve, the air outlet of the fan is connected with the air inlet of the heater, the air outlet of the heater is connected with the side of the bottom cylinder through the pipeline, the filter is installed in the storage cylinder, the bottom of the filter is provided with the discharge port, the inside of the storage cylinder is vertically provided with the auxiliary ventilation pipe, the top of the auxiliary ventilation pipe is closed, the side wall of the auxiliary ventilation pipe is evenly distributed with a plurality of air holes, the cover plate is installed with the lifting device, the auxiliary ventilation pipe is connected with the lifting end of the lifting device, the lifting device can drive the auxiliary ventilation pipe to move up and down, and make the auxiliary ventilation pipe plug into the discharge port of the filter or make the bottom end of the auxiliary ventilation pipe above the discharge port of the filter.

[0007] Further, the lifting device is a pneumatic cylinder, the pneumatic cylinder is vertically installed on the cover plate, and the piston rod of the pneumatic cylinder is connected with the top end of the auxiliary ventilation pipe.

[0008] The beneficial effect of the utility model is: compared with traditional hot air type dehumidification device, the device sets up auxiliary ventilation pipe in longitudinal direction in storage cylinder, the hot air generated by fan and heater can not only flow upward directly through filter, but also diffuse outward from the center of storage cylinder through auxiliary ventilation pipe, which effectively increases the contact area of plastic particles and hot air, can spend less time and complete the drying of plastic particles more quickly, the auxiliary ventilation pipe can also play the effect of opening or closing the discharge port of filter, need not set valve mechanism under filter, simplifies the structure of whole device, reduces processing cost. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is structural schematic view of the utility model embodiment.

[0010] The number of attached drawings is explained: 1, storage cylinder, 2, fan, 3, heater, 31, elbow, 4, cover plate, 41, feed inlet, 5, bottom cylinder, 51, valve, 6, filter, 7, auxiliary ventilation pipe, 8, air cylinder. DETAILED DESCRIPTION

[0011] The technical scheme in the utility model embodiment will be described clearly and completely in combination with the drawings in the utility model embodiment, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment.Based on the embodiment of the utility model, all other embodiments obtained by the ordinary skill in the art belong to the protection scope of the utility model.

[0012] As Figure 1As shown, the drying device comprises a storage cylinder 1, a fan 2 and a heater 3, the top of the storage cylinder 1 is connected with a cover plate 4 through flanges, the cover plate 4 is provided with an inlet 41, the bottom of the storage cylinder 1 is connected with a conical bottom cylinder 5 through flanges, the bottom of the bottom cylinder 5 is connected with a valve 51, the fan 2 and the heater 3 are both arranged outside the storage cylinder 1, the air outlet of the fan 2 is connected with the air inlet of the heater 3, the air outlet of the heater 3 is connected with the side of the bottom cylinder 5 through a pipeline, preferably, the pipeline is a bend pipe 31, the first end of the bend pipe 31 is connected with the air outlet of the heater 3, the second end of the bend pipe 31 penetrates through the side wall of the bottom cylinder 5 and extends into the inside of the bottom cylinder 5, a filter 6 is fixedly installed below the inside of the storage cylinder 1, the filter 6 separates the inner cavity of the storage cylinder 1 and the inner cavity of the bottom cylinder 5, and has the effect of blocking the plastic particles, a circular discharge port is formed in the bottom of the filter 6, an auxiliary ventilation pipe 7 is longitudinally arranged in the inside of the storage cylinder 1, the top of the auxiliary ventilation pipe 7 is closed, a plurality of air holes are uniformly distributed on the side wall of the auxiliary ventilation pipe 7, the size of the air holes is smaller than the size of the plastic particles to be dried, a gas cylinder 8 is longitudinally installed on the cover plate 4, the top end of the auxiliary ventilation pipe 7 is connected with the piston rod of the gas cylinder 8, the gas cylinder 8 can drive the auxiliary ventilation pipe 7 to move up and down, and make the auxiliary ventilation pipe 7 plug into the discharge port of the filter 6 or make the bottom end of the auxiliary ventilation pipe 7 be above the discharge port of the filter 6.

[0013] In actual application, when the auxiliary ventilation pipe 7 plugs into the discharge port of the filter 6, the plastic particles cannot fall, at this time, the fan 2 and the heater 3 are turned on, the hot air heated by the heater 3 can not only flow upwards directly through the filter 6, but also diffuse outward from the center of the storage cylinder 1 through the auxiliary ventilation pipe 7, which effectively increases the contact area of the plastic particles and the hot air, and can complete the drying of the plastic particles in less time and more quickly; after the drying is completed, the auxiliary ventilation pipe 7 is lifted by the gas cylinder 8, so that the bottom end of the auxiliary ventilation pipe 7 is above the discharge port of the filter 6, so that the discharge port of the filter 6 is opened, then the valve 51 is opened, and the plastic particles can be smoothly discharged.

[0014] The above merely describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A drying device for bio-based plastic processing, comprising a storage cylinder (1), a fan (2) and a heater (3), a cover plate (4) is connected to the top of the storage cylinder (1), an inlet (41) is arranged on the cover plate (4), a conical bottom cylinder (5) is connected to the bottom of the storage cylinder (1), a valve (51) is connected to the bottom of the bottom cylinder (5), the outlet of the fan (2) is connected to the inlet of the heater (3), and the outlet of the heater (3) is connected to the side of the bottom cylinder (5) through a pipeline, characterized in that, The filter (6) is installed in the storage cylinder (1), the bottom of the filter (6) is provided with a discharge port, the inside of the storage cylinder (1) is longitudinally provided with an auxiliary ventilation pipe (7), the top of the auxiliary ventilation pipe (7) is closed, the sidewall of the auxiliary ventilation pipe (7) is uniformly provided with a plurality of air holes, the cover plate (4) is installed with a lifting device, the auxiliary ventilation pipe (7) is connected with the lifting end of the lifting device, the lifting device can drive the auxiliary ventilation pipe (7) to move up and down, and the auxiliary ventilation pipe (7) is inserted into the discharge port of the filter (6) or the bottom end of the auxiliary ventilation pipe (7) is located above the discharge port of the filter (6).

2. The drying apparatus for bio-based plastic processing according to claim 1, characterized in that, The lifting device is a pneumatic cylinder (8), the pneumatic cylinder (8) is longitudinally installed on the cover plate (4), and the piston rod of the pneumatic cylinder (8) is connected with the top end of the auxiliary ventilation pipe (7).

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