CN113926285A - Vacuum devolatilization filtering device of high polymer material extrusion equipment - Google Patents

Abstract

The invention relates to a vacuum devolatilization filtering device of high polymer material extrusion equipment, which comprises a buffering filtering box, wherein a filtering cavity is arranged in the buffering filtering box, one end of the filtering cavity is provided with an inflow port, the other end of the filtering cavity is provided with an outflow port, two ends of the buffering filtering box are provided with a volatile gas discharging pipe and a negative pressure pipe, the volatile gas discharging pipe is connected with the inflow port and an exhaust port of an extruder, one end of the negative pressure pipe is connected with the outflow port, and the other end of the negative pressure pipe is externally connected with a vacuum gas source; a plurality of guide plates which are arranged in parallel and spaced in rows are arranged in the filter cavity, and the guide plates are positioned between the inflow port and the outflow port to filter the volatile gas; and a box cover capable of being opened to expose the filter cavity is arranged on one side of the buffer filter box, and the guide plate can be drawn out after the filter cavity is exposed. The invention leads the volatile gas generated by the extruder out of the external filter cavity, and the guide plate can be pumped out of the filter cavity by filtering through the guide plate, so that the adhered small molecular substances are cleaned, and the filter is clean and thorough and is easy to clean.

Description

Vacuum devolatilization filtering device of high polymer material extrusion equipment

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of extrusion, in particular to a vacuum devolatilization filtering device of high polymer material extrusion equipment.

[ background of the invention ]

In the extrusion molding process, since the materials used often entrain air, moisture, residual monomers, oligomers and other volatile components, if not excluded, bubbles, pores, scars and the like are formed, and the quality of the product is affected. Nowadays, the residual monomer content of the product is more and more strict, and some of the residual monomer content is required to be reduced to several ppm because of the requirements of environmental protection and food packaging. Polymer devolatilization, which is the process for removing low molecular weight components from a polymer system, is a link that is often underestimated but very important in polymer extrusion processing.

In order to reduce volatile matters, a vacuum vent is generally arranged on the extruder, and volatile matters in the melt are removed by means of vacuumizing, but the volatile matters can be adhered and deposited in a vacuum generator (such as a vacuum pump) after entering the vacuum generator, so that the use of the vacuum generator is influenced, and even the volatile matters can be damaged.

In view of the above problems, the applicant has proposed a solution.

[ summary of the invention ]

The invention aims to overcome the defects of the prior art and provides a vacuum devolatilization filtering device of high polymer material extrusion equipment.

In order to solve the technical problems, the invention adopts the following technical scheme:

a vacuum devolatilization filtering device of high polymer material extrusion equipment comprises a buffering filtering box, wherein a filtering cavity is arranged in the buffering filtering box, an inflow port is formed in one end of the filtering cavity, an outflow port is formed in the other end of the filtering cavity, a volatile gas discharging pipe and a negative pressure pipe are arranged at two ends of the buffering filtering box, the volatile gas discharging pipe is connected with the inflow port and an exhaust port of an extruder, one end of the negative pressure pipe is connected with the outflow port, and the other end of the negative pressure pipe is externally connected with a vacuum gas source; a plurality of guide plates which are arranged in parallel and spaced in rows are arranged in the filter cavity, and the guide plates are positioned between the inflow port and the outflow port to filter volatile gas; and a box cover capable of being opened to expose the filter cavity is arranged on one side of the buffer filter box, and the guide plate can be drawn out after the filter cavity is exposed.

In a further development, the filter chamber is provided with a waste liquid outlet opening at the bottom adjacent to the outlet port.

In a further development, the vacuum line is connected to a condensation vacuum generator.

In a further development, the box cover is hinged to the side of the buffer filter box.

In further improvement, still including the grudging post be equipped with a plurality of buffering filter tanks on the grudging post, be equipped with the waste liquid discharge pipe in the waste liquid outlet department of each buffering filter tank, be equipped with the waste liquid and be responsible for on grudging post one side, each waste liquid discharge pipe all is connected to the waste liquid and is responsible for.

In a further improvement scheme, a plurality of guide rail grooves are formed in the bottom of the filter cavity, and the guide plate can be inserted into the guide rail grooves to be fixed or drawn out of the guide rail grooves.

Compared with the prior art, the invention has the beneficial effects that: under the action of vacuum negative pressure, volatile gas discharged from an exhaust port of the extruder is discharged into a pipe through the volatile gas, enters a filtering cavity through an inflow port, flows from a connected inflow port to an outflow port, passes through a guide plate in the flowing process of the volatile gas, is adhered to the guide plate by small molecular substances on the volatile gas, is adhered and filtered by multiple guide plates, and finally flows out of the outflow port; the guide plate can be taken out from the filter cavity after being filtered for a period of time, small molecular substances adhered to the guide plate are scraped completely, and then the guide plate is inserted. The invention leads the volatile gas generated by the extruder out of the external filter cavity, and the volatile gas is filtered by the guide plate, so that the volatile gas is completely filtered and is easy to clean.

The invention is described in further detail below with reference to the following detailed description and accompanying drawings:

[ description of the drawings ]

FIG. 1 is a first perspective view of an embodiment of the present invention;

FIG. 2 is a second perspective view of the embodiment of the present invention;

FIG. 3 is a schematic perspective view of a buffer filter box according to an embodiment of the present invention;

FIG. 4 is a first cross-sectional view of a buffer filter box according to an embodiment of the present invention;

fig. 5 is a second cross-sectional view of the buffer filter box according to the embodiment of the invention.

[ detailed description ] embodiments

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout.

The orientation shown in the drawings is not to be construed as limiting the specific scope of the invention, but is for the best understanding of the preferred embodiments only, and changes in location or addition of numbers or structural simplifications may be made to the product parts shown in the drawings.

The relation of "connected" between the components shown in the drawings and described in the specification can be understood as fixedly connected or detachably connected or integrally connected; the connecting elements can be directly connected or connected through an intermediate medium, and persons skilled in the art can understand the connecting relation according to specific conditions, and can use the connecting elements in a screwed connection or riveting connection or welding connection or clamping connection or embedding connection mode to replace different embodiments in a proper mode.

The terms of orientation such as up, down, left, right, top, bottom, and the like in the description and the orientation shown in the drawings, may be used for direct contact or contact with each other through another feature therebetween; above may be directly above and obliquely above, or it simply means above the other; other orientations may be understood by analogy.

The material for manufacturing the solid-shaped component shown in the specification and the drawings can be a metal material or a non-metal material or other composite materials; the machining processes used for components having solid shapes can be stamping, forging, casting, wire cutting, laser cutting, casting, injection molding, digital milling, three-dimensional printing, machining, and the like; one skilled in the art can select the materials and the manufacturing process adaptively or in combination according to different processing conditions, cost and precision.

The invention relates to a vacuum devolatilization filtering device of high polymer material extrusion equipment, which comprises a buffering filtering box 10, wherein a filtering cavity 20 is arranged in the buffering filtering box 10, one end of the filtering cavity 20 is provided with an inflow port, the other end of the filtering cavity 20 is provided with an outflow port 21, two ends of the buffering filtering box 10 are provided with a volatile gas discharging pipe 30 and a negative pressure pipe 40, the volatile gas discharging pipe 30 is connected with the inflow port and an exhaust port of an extruder, one end of the negative pressure pipe 40 is connected with the outflow port 21, and the other end of the negative pressure pipe is externally connected with a vacuum gas source; a plurality of parallel and spaced flow deflectors 50 arranged in a row are arranged in the filter cavity 20, and the flow deflectors 50 are positioned between the inflow port and the outflow port 21 to filter the volatile gas; a box cover 60 which can be opened to expose the filter cavity is arranged on one side of the buffer filter box 10, the box cover 60 is hinged on the side part of the buffer filter box 10, and the guide plate 50 can be drawn out after the filter cavity 20 is exposed.

The device is used for a high polymer material extrusion process, is usually matched with a co-rotating parallel double-screw extruder for use, and under the action of vacuum negative pressure, volatile gas discharged from an exhaust port of the extruder enters a filtering cavity 20 through a volatile gas discharge pipe 30 and an inflow port, flows to an outflow port 21 from a connected inflow port, passes through a guide plate 50 in the flowing process of the volatile gas, small molecular substances on the volatile gas adhere to the guide plate 50, and finally flows out of the outflow port 21 after being adhered and filtered by a multiple guide plate 50. A certain distance exists between the top of the guide plate 50 and the top of the filter cavity 20, gas enters from the lower part of one side of the filter cavity 20 and flows through the top of the filter cavity 20, or the top of part of the guide plate 50 can be connected with the top of the filter cavity 20, a gap is reserved at the bottom of the guide plate, and the gas flows along the upper, lower, upper and lower curves of the filter cavity 20, so that the adhesion filtering effect is enhanced; after the guide plate 50 is filtered for a period of time, the guide plate 50 can be drawn out from the filter cavity 20, small substances adhered to the guide plate 50 are scraped completely, and then the guide plate 50 is inserted. The invention leads the volatile gas generated by the extruder out to the external filter cavity, and the volatile gas is filtered by the guide plate 50, so that the volatile gas is completely filtered and is easy to clean.

In the embodiment shown in fig. 1 and 2, the filter chamber 20 is provided with a waste liquid discharge port 22 at the bottom near the outlet port, so that the filtered waste liquid in the filtering process can be discharged.

In the embodiment, the negative pressure pipe 40 is connected with the condensation negative pressure vacuum generating device, and can reduce the temperature in the filter cavity 20 and the temperature of the guide plate 50 while vacuumizing, so that the volatile gas can be more easily adhered to the guide plate 50 when filtering in circulation, thereby enhancing the filtering effect, and in addition, the moisture carried in the volatile gas can be more easily condensed.

In the embodiment, as shown in fig. 1 and 2, a vertical frame 70 is further included, a plurality of buffer filter tanks 10 are provided on the vertical frame 70, a waste liquid discharge pipe 80 is provided at the waste liquid discharge port 22 of each buffer filter tank 10, a waste liquid main pipe 90 is provided on one side of the vertical frame 70, and each waste liquid discharge pipe 80 is connected to the waste liquid main pipe 90.

In an embodiment, as shown in fig. 2, a plurality of rail grooves 23 are provided at the bottom of the filter chamber 20, and the guide plate 50 may be inserted into the rail grooves 23 to be fixed or withdrawn from the rail grooves 23.

Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications can be made herein without departing from the principles and spirit of the invention as defined by the appended claims. Therefore, the detailed description of the embodiments of the present disclosure is to be construed as merely illustrative, and not limitative of the remainder of the disclosure, but rather to limit the scope of the disclosure to the full extent set forth in the appended claims.

Claims (6)

1. A vacuum devolatilization filtering device of high polymer material extrusion equipment is characterized by comprising a buffering filtering box, wherein a filtering cavity is arranged in the buffering filtering box, one end of the filtering cavity is provided with an inflow port, the other end of the filtering cavity is provided with an outflow port, two ends of the buffering filtering box are provided with a volatile gas discharging pipe and a negative pressure pipe, the volatile gas discharging pipe is connected with the inflow port and an exhaust port of an extruder, one end of the negative pressure pipe is connected with the outflow port, and the other end of the negative pressure pipe is externally connected with a vacuum gas source; a plurality of guide plates which are arranged in parallel and spaced in rows are arranged in the filter cavity, and the guide plates are positioned between the inflow port and the outflow port to filter volatile gas; and a box cover capable of being opened to expose the filter cavity is arranged on one side of the buffer filter box, and the guide plate can be drawn out after the filter cavity is exposed.

2. The vacuum devolatilization filter apparatus as claimed in claim 1, wherein said filter chamber is provided with a waste liquid discharge port at a bottom portion thereof facing the outflow port.

3. The vacuum devolatilization and filtration device of a high polymer material extrusion device as recited in claim 2, wherein said negative pressure pipe is connected to a condensation negative pressure vacuum generating device.

4. The vacuum devolatilization filter device as claimed in claim 3, wherein the cover is hinged to a side portion of the buffer filter box.

5. The vacuum devolatilization and filtration device for polymer material extrusion equipment as claimed in claim 4, further comprising a vertical frame, wherein a plurality of buffer filtration tanks are disposed on said vertical frame, a waste liquid discharge pipe is disposed at a waste liquid discharge port of each buffer filtration tank, a waste liquid main pipe is disposed at one side of the vertical frame, and each waste liquid discharge pipe is connected to the waste liquid main pipe.

6. The vacuum devolatilization filter device as claimed in claim 4, wherein a plurality of guide grooves are formed in a bottom of the filter chamber, and the guide plate may be inserted into the guide grooves to be fixed or withdrawn from the guide grooves.

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