CN202208103U - Continuous filter with distribution screw for melt purification in plastic extrusion systems - Google Patents

Abstract

The utility model discloses a continuous filter with a distribution screw for purifying melts of a plastic extrusion system, which comprises a machine body, wherein a feed inlet and a discharge outlet are arranged on the machine body, a through melt channel is arranged between the feed inlet and the discharge outlet, a filter sleeve is arranged in the melt channel in the machine body, a plurality of filter holes are arranged on the filter sleeve, the filter holes are conical, and the diameter of an inlet end hole of each filter hole is smaller than that of an outlet end hole; the middle of the filter sleeve is provided with a screw, the surface of the screw is based on the center of the feed inlet, the upper part and the lower part of the screw are arranged as two sections of threads with opposite directions, and the novel structure with the distribution screw and the dirty material automatic cleaning and discharging system can ensure that the equipment can run for a long time without manually cleaning impurities.

Description

Continuous filter with distribution screw for melt purification in plastic extrusion systems

technical field

The utility model relates to a melt purification filter used in plastic extrusion production, in particular to a filter with a distributing screw used for purification of melt in a plastic extrusion system.

Background technique

In the field of production and extrusion of plastic plates, sheets, and films, the filter is an accessory device connected between the extruder and the die, and the molten medium at the feed end is filtered through the filter mesh inside the filter and promoted again. Plasticizing to meet the requirements of the manufactured product.

Existing filters usually have filter screens to filter impurities. If this type of filter is used to produce dirty raw materials, that is, raw materials with a lot of impurities, the impurities will quickly accumulate in the filter area due to the limited filtering area. The filter screen needs to be replaced after a short period of production, which brings a lot of inconvenience to the production.

Utility model content

The purpose of this utility model is to provide a special filter for the purification of the melt in the plastic extrusion system, which is suitable for the production of those types of raw materials with more impurities. Ensure that the equipment runs for a long time without manual cleaning of impurities.

Above-mentioned object realizes through following technical scheme:

The continuous filter with distributing screw used for melt purification of plastic extrusion system, including organic body, wherein the body is provided with a material inlet and a material outlet, and a through melt channel is arranged between the inlet and outlet. It is characterized in that: the filter sleeve is built in the melt channel in the body, and several filter holes are arranged on the filter sleeve, and the diameter of the inflow end of the filter hole is smaller than the diameter of the outflow end; a screw is arranged in the middle of the filter sleeve, and the surface of the screw is in order to The center of the feed port is used as the reference, and the upper and lower parts are set as two sections of threads with opposite directions.

The filter holes on the filter sleeve are densely arranged on the side part of the filter sleeve wall facing the discharge port.

The melt inlet port of the filter hole has a small diameter, ranging from 0.3 mm to 1 mm, and the melt outlet port has a large diameter, ranging from 1 mm to 3 mm; the distance between each filter hole is 4 mm to 10 mm.

There are two sets of filter sleeves and screw rods on the body.

The inner hole of the sealing sleeve is provided with threads that are opposite to the rotation of the shaft, and the number of threads is 2-4.

The body has a discharge channel, and the discharge channel runs through the melt channel at the two ports of the filter sleeve and the discharge port on the body.

The discharge channel is connected with a discharge control device. When the impurities in the discharge channel accumulate under a certain pressure, the control device is activated to open the discharge port to remove the impurities from the body, so as to realize automatic discharge without stopping the machine.

When the melt flows in through the feed port of the machine body, it flows into the filter sleeve. The large impurities in the melt are blocked by the filter hole on the inside of the filter sleeve, and the clean melt passes through the filter hole smoothly, and then flows into the filter sleeve after being filtered. From the discharge channel to the discharge port, the filtration of impurities in the melt is completed. The screw is driven by the gear box to rotate, and the melt is driven to flow in the filter sleeve through the rotation of the screw, and the screw flight will scrape the filtered impurities to the vicinity of the discharge ports at both ends, and after a certain period of time, the discharge port will be opened to discharge the impurities from the body , to achieve non-stop automatic cleaning.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is wherein the utility model wherein parts such as screw rod and filter sleeve disassembled structural representation;

Fig. 3 is a sectional view of the structure of the internal melt channel of the utility model;

Fig. 4 is a partial enlarged view of the part indicated by A in Fig. 3;

Fig. 5 is a structural schematic diagram of another angle of the utility model.

Detailed ways

    Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figures 1, 2, 3, 4, and 5, the continuous filter with distribution screw used for plastic extrusion system melt purification, the filter consists of a discharge transition plate 1, a body 2, a filter sleeve 3, and a bearing 4 , sealing cover plate 5, sealing thread sleeve 6, screw rod 7, gear 8, connecting flange 9 and reduction box 10, wherein the body 2 is provided with a material inlet 21 and a material outlet 22, between the inlet and outlet A continuous melt channel 23 is provided. In this embodiment, the melt channel 23 in the body is divided into two branches, the filter sleeve 3 and the screw 7 on the body are provided with two groups, the filter sleeve 3 is built in the melt channel 23 in the body, and the filter sleeve 3 Several filter holes 31 are provided, and the filter holes 31 are arranged on the side part of the wall of the filter sleeve facing the discharge port, and the diameter of the inflow port of the filter holes 31 is smaller than that of the outflow port. Among them, the diameter of the orifice d1 at the melt inflow port of the filter hole 31 is small, with a diameter range of 0.3 mm ~ 1 mm, and the diameter of the orifice d2 at the melt outflow port is large, with a diameter range of 1 mm ~ 3 mm; each filter hole 31 is spaced at a distance of 4 mm ~ 10 mm.

A screw rod 7 is arranged in the middle of the filter sleeve 3, and the surface of the screw rod 7 is based on the center of the feed port 21. The upper and lower parts of the screw rod 7 are arranged as two sections of threads opposite to each other, and the thread direction of the motor input end is opposite to the direction of rotation of the motor. If there are multiple screw rods, the principle of setting the thread direction on the screw rod 7 is that after the screw rod 7 rotates, the melt in the screw groove flows from the center to both ends. Wherein its inner hole of the sealing threaded sleeve 6 is provided with a screw thread that is opposite to the shaft rotation, and the number of thread heads is 2-4.

As shown in Figures 3 and 4, there is a discharge channel 24 on the body 2, and the discharge channel 24 runs through the melt channel 23 at the two ports of the filter sleeve and the discharge port 25 on the body. A discharge control device 26 is connected to the discharge channel 24. When the impurities inside the discharge channel 24 accumulate under a certain pressure, the control device 26 is activated, and the discharge port 25 is opened to remove the impurities from the body, realizing automatic discharge without stopping the machine.

When the melt flows in through the feed port 21 of the machine body, it flows into the filter sleeve 3, and the large impurities in the melt are blocked on the inside of the filter sleeve 3 by the filter hole 31, and the clean melt passes through the filter hole 31 smoothly, and then passes through the filter sleeve 3. After filtering, the filter sleeve 3 flows into the discharge channel to the discharge port 22 to complete the filtration of impurities in the melt. The screw 7 is driven by the reduction box to rotate, and the rotation of the screw 7 drives the melt to flow in the filter sleeve 3, and the flight of the screw 7 will scrape the filtered impurities to the vicinity of the discharge ports 25 at both ends, and open the discharge after accumulating for a certain period of time Port 25 discharges the impurities out of the body to realize automatic cleaning without stopping the machine.

Claims (7)

1. Continuous filter with distributing screw used for melt purification of plastic extrusion system, including organic body, wherein the body is provided with a material inlet and a material outlet, and a through-melt channel is provided between the inlet and outlet , which is characterized in that: the filter sleeve is built in the melt channel in the body, and several filter holes are arranged on the filter sleeve, and the diameter of the inflow port of the filter hole is smaller than the diameter of the outflow port; a screw is arranged in the middle of the filter sleeve, and the surface of the screw is Taking the center of the feed inlet as the benchmark, the upper and lower parts are set as two sections of threads with opposite directions. 2. The continuous filter with distributing screw used for plastic extrusion system melt purification as claimed in claim 1, characterized in that: the filter holes on the filter sleeve are densely arranged on the side of the filter sleeve wall facing the discharge port. side part. 3. The continuous filter with distributing screw used for purifying the melt of plastic extrusion system as claimed in claim 1 or 2, characterized in that: the diameter of the orifice of the melt inflow port of the filter hole is small, and the diameter range is 0.3 mm ~1mm, the diameter of the orifice at the melt outflow port is large, and the diameter range is 1 mm ~3mm; the distance between each filter hole is 4 mm ~10mm. 4. The continuous filter with distributing screw used for purifying the melt of plastic extrusion system according to claim 1, characterized in that: the filter sleeve and the screw on the body are provided with two groups. 5. The continuous filter with distributing screw used for purifying the melt of plastic extrusion system as claimed in claim 1, characterized in that: the inner hole of the sealing sleeve is provided with a thread that is opposite to the rotation of the shaft, and the thread The number of heads is 2-4. 6. The continuous filter with distributing screw used for purifying the melt of plastic extrusion system as claimed in claim 1, characterized in that: the body has a discharge channel, and the discharge channel runs through the two ports of the filter sleeve The melt channel and the discharge port on the machine body. 7. The continuous filter with distributing screw used for purifying the melt of plastic extrusion system according to claim 6, characterized in that: the discharge channel is connected with a discharge control device.

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