Plastic melt filtering device

Abstract

The plastic melt filtering device comprises a filtering main body, a filtering channel is arranged in the filtering main body, and a filtering component is arranged on the filtering channel; a moving mechanism is arranged on the filtering main body, the moving mechanism comprises a moving plate, a plurality of through holes which are distributed up and down are formed in the moving plate, the filtering parts are arranged on the through holes, and when the moving plate moves up and down to the corresponding position, one through hole in the moving plate is formed in the filtering channel. According to the filtering device disclosed by the utility model, the filtering channel is arranged in the filtering main body, the filtering component is arranged on the filtering channel, and the filtering component can be used for filtering impurities in a plastic melt, so that a formed plastic film does not contain impurities, and the product quality and the environmental protection property are improved; besides, by arranging the moving plate capable of moving up and down, the filtering parts are distributed on the moving plate up and down, if the filtering parts become dirty after being used for a period of time, the moving plate can be moved up and down to switch other filtering parts for filtering, so that the filtering parts do not need to be frequently replaced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of film manufacturing, in particular to a plastic melt filtering device. Background Art

[0002] During the manufacturing process of plastic film, since the raw materials contain impurities, the formed plastic film also contains impurities, which affects the product quality and is not environmentally friendly. If the plastic film is used to make food packaging bags, it may contaminate the food and endanger people's health. Some plastic film manufacturing equipment on the market is equipped with a filtering device to filter impurities, but the filtering device will become dirty after a period of use, and the filtering effect will decrease. At this time, the filter component needs to be replaced, and the filter component needs to be replaced frequently, affecting production efficiency.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The utility model aims to provide a plastic melt filtering device with simple and reasonable structure, good filtering effect, reliable environmental protection, high production efficiency and strong practicality, so as to overcome the shortcomings of the prior art.

[0005] A plastic melt filtering device designed for this purpose comprises a filtering body, characterized in that a filtering channel for the plastic melt to pass through is arranged in the filtering body, and a filtering component for filtering the plastic melt is arranged on the filtering channel.

[0006] A moving mechanism is arranged on the filter body, and the moving mechanism includes a moving plate movably arranged up and down, and a plurality of through holes distributed up and down are arranged on the moving plate, and the filter component is arranged on the through holes. When the moving plate moves up and down to the corresponding position, one of the through holes on the moving plate is arranged on the filter channel.

[0007] The moving mechanism also includes a driver, which drives the connected moving plate, and the driver drives the moving plate to move up and down.

[0008] The filter body includes a first filter body and a second filter body respectively arranged on both sides of the movable plate, the filter channel is arranged on the first filter body and the second filter body, and an expansion member is arranged in the first filter body and / or the second filter body. When the expansion member expands, it acts on the first filter body and / or the second filter body so that the first filter body and the second filter body press the movable plate tightly.

[0009] A heating component for heating the expansion element to expand the expansion element is disposed on the outer sides of the first filter body and the second filter body.

[0010] The first filter body includes a first filter plate and a first pressing member, the second filter body includes a second filter plate and a second pressing member, the first pressing member is installed on the first filter plate, the second pressing member is installed on the second filter plate, the movable plate is arranged between the first pressing member and the second pressing member, and the expansion member is arranged between the first filter plate and the first pressing member, and / or the second filter plate and the second pressing member; when the expansion member expands, it acts on the first pressing member and / or the second pressing member, so that the first pressing member and the second pressing member press the movable plate.

[0011] The first filter plate and / or the second filter plate is provided with a pressure detector for detecting the internal pressure of the filter channel.

[0012] The first filter plate is provided with a feed port, the second filter plate is provided with a discharge port, and the feed port, the filter channel and the discharge port are connected in sequence.

[0013] The filter component is a filter net, and a plurality of filter holes are arranged on the filter net.

[0014] The expansion piece is made of polytetrafluoroethylene.

[0015] The utility model provides a plastic melt filtering device, which provides a filtering channel in a filtering body, and a filtering component on the filtering channel, and the filtering component can filter out impurities in the plastic melt, so that the plastic film after molding does not contain impurities, thereby improving product quality and environmental protection; in addition, by providing a movable plate that moves up and down, the filtering components are distributed up and down on the movable plate, and if the filtering components become dirty after being used for a period of time, the movable plate can be moved up and down to switch to other filtering components for filtering, so that there is no need to frequently replace the filtering components, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the filtering device in one embodiment of the utility model.

[0017] Figure 2 It is a schematic diagram of the overall structure of the filtering device in another aspect in one embodiment of the utility model.

[0018] Figure 3 It is a cross-sectional view of a filtering device in one embodiment of the utility model.

[0019] Figure 4 It is a schematic diagram of the exploded structure of the filtering device in one embodiment of the utility model. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] See also Figure 1-Figure 4The plastic melt filtering device comprises a filtering body 1, in which a filtering channel 2 for passing the plastic melt is arranged, and a filtering component 3 for filtering the plastic melt is arranged on the filtering channel 2; when the plastic melt passes through the filtering channel 2, the filtering component 3 filters the plastic melt to remove impurities in the plastic melt, and after the plastic melt passes through the filtering device, it enters the film forming equipment to be used for forming the plastic film.

[0022] A moving mechanism is provided on the filter body 1, and the moving mechanism includes a moving plate 4 movably arranged up and down, and a plurality of through holes 5 distributed up and down are provided on the moving plate 4, and the filter component 3 is arranged on the through hole 5. When the moving plate 4 moves up and down to the corresponding position, one of the through holes 5 on the moving plate 4 is arranged on the filter channel 2, so that the filter component 3 on the through hole 5 is arranged on the filter channel 2, and the other through holes 5 on the moving plate 4 are located outside the filter channel 2. In this embodiment, two through holes 5 are arranged, that is, two filter components 3 are arranged.

[0023] The moving mechanism also includes a driver 6 , which drives the connected moving plate 4 , and the driver 6 drives the moving plate 4 to move up and down to switch the filter component 3 to the filter channel 2 ; the driver 6 is a hydraulic cylinder (oil cylinder).

[0024] The filter body 1 includes a first filter body and a second filter body respectively arranged on both sides of the movable plate 4, the filter channel 2 is arranged on the first filter body and the second filter body, and an expansion member 7 is arranged in the first filter body and / or the second filter body. When the expansion member 7 expands, it acts on the first filter body and / or the second filter body, so that the first filter body and the second filter body press the movable plate 4 tightly to play a sealing role, thereby preventing the plastic melt from leaking from the gap between the first filter body and the movable plate 4, and the gap between the second filter body and the movable plate 4.

[0025] A heating component 8 for heating the expansion member 7 to expand the expansion member 7 is disposed on the outer side of the first filter body and the second filter body. The heating component 8 is a heating ring and can also heat the plastic melt in the filter channel 2 .

[0026] The first filter body includes a first filter plate 9 and a first pressing member 10, and the second filter body includes a second filter plate 11 and a second pressing member 12. The first pressing member 10 is installed on the first filter plate 9, and the second pressing member 12 is installed on the second filter plate 11. The movable plate 4 is arranged between the first pressing member 10 and the second pressing member 12. The expansion member 7 is arranged between the first filter plate 9 and the first pressing member 10, and / or between the second filter plate 11 and the second pressing member 12. The expansion member 7 of this embodiment is arranged between the first filter plate 9 and the first pressing member 10; when the expansion member 7 expands, it acts on the first pressing member 10, so that the first pressing member 10 and the second pressing member 12 press the movable plate 4.

[0027] The heating component 8 is respectively sleeved on the outer peripheral sides of the first filter plate 9 and the second filter plate 11, and the heat generated by the heating component 8 is transferred to the expansion member 7 through the first filter plate 9, and the heat generated by the heating component 8 is respectively transferred to the filter channel 2 through the first filter plate 9 and the second filter plate 11.

[0028] A fixing frame 17 is provided between the first filter plate 9 and the second filter plate 11. The fixing frame 17 is fixed to the first filter plate 9 and the second filter plate 11 by screws. The driver 6 is fixed to the fixing frame 17. The first filter plate 9 and the second filter plate 11 are connected by screws.

[0029] A pressure detector 13 for detecting the internal pressure of the filter channel 2 is provided on the first filter plate 9 and / or the second filter plate 11. In this embodiment, a mounting hole 18 is provided on the first filter plate 9. The mounting hole 18 is connected to the filter channel 2. The pressure detector 13 is installed on the mounting hole 18. The pressure detector 13 is a detection probe or a detection probe rod.

[0030] A feed port 14 is disposed on one side of the first filter plate 9, and a discharge port 15 is disposed on one side of the second filter plate 11. The feed port 14, the filter channel 2 and the discharge port 15 are connected in sequence.

[0031] The filter component 3 is a filter screen, and a plurality of filter holes 16 are arranged on the filter screen.

[0032] The expansion member 7 is made of polytetrafluoroethylene (ie Teflon or plastic king).

[0033] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A plastic melt filtering device, comprising a filtering body (1), characterized in that: A filter channel (2) for plastic melt to pass through is arranged in the filter body (1), and a filter component (3) for filtering the plastic melt is arranged on the filter channel (2); A moving mechanism is provided on the filter body (1), the moving mechanism comprising a moving plate (4) movably arranged up and down, a plurality of through holes (5) distributed up and down are provided on the moving plate (4), the filter component (3) is arranged on the through hole (5), and when the moving plate (4) moves up and down to a corresponding position, one of the through holes (5) on the moving plate (4) is arranged on the filter channel (2); The filter body (1) comprises a first filter body and a second filter body respectively arranged on both sides of a movable plate (4); the filter channel (2) is arranged on the first filter body and the second filter body; an expansion member (7) is arranged in the first filter body and / or the second filter body; when the expansion member (7) expands, it acts on the first filter body and / or the second filter body, so that the first filter body and the second filter body press the movable plate (4) tightly.

2. The plastic melt filtering device according to claim 1, characterized in that: The moving mechanism further comprises a driver (6), wherein the driver (6) drives the connected moving plate (4), and the driver (6) drives the moving plate (4) to move up and down.

3. The plastic melt filtering device according to claim 2, characterized in that: A heating component (8) for heating the expansion piece (7) to expand the expansion piece (7) is provided on the outside of the first filter body and the second filter body.

4. The plastic melt filtering device according to claim 3, characterized in that: The first filter body comprises a first filter plate (9) and a first pressing member (10), and the second filter body comprises a second filter plate (11) and a second pressing member (12). The first pressing member (10) is mounted on the first filter plate (9), and the second pressing member (12) is mounted on the second filter plate (11). The movable plate (4) is arranged between the first pressing member (10) and the second pressing member (12). The expansion member (7) is arranged between the first filter plate (9) and the first pressing member (10), and / or the second filter plate (11) and the second pressing member (12). When the expansion member (7) expands, it acts on the first pressing member (10) and / or the second pressing member (12), so that the first pressing member (10) and the second pressing member (12) press the movable plate (4).

5. The plastic melt filtering device according to claim 4, characterized in that: A pressure detector (13) for detecting the internal pressure of the filter channel (2) is provided on the first filter plate (9) and / or the second filter plate (11).

6. The plastic melt filtering device according to claim 4, characterized in that: The first filter plate (9) is provided with a feed port (14), the second filter plate (11) is provided with a discharge port (15), and the feed port (14), the filter channel (2) and the discharge port (15) are sequentially connected.

7. The plastic melt filtering device according to claim 1, characterized in that: The filter component (3) is a filter screen, and a plurality of filter holes (16) are arranged on the filter screen.

8. The plastic melt filtering device according to claim 4, characterized in that: The expansion member (7) is made of polytetrafluoroethylene.

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