Plastic raw material drying hopper filter screen

Abstract

The utility model discloses a kind of plastic raw material drying hopper filter screen, belong to filter hopper technical field. Including first filter hopper and second filter hopper, first filter hopper is suspended in the inside of second filter hopper, and the distance between first filter hopper and second filter hopper is equal everywhere, the mesh size of first filter hopper is greater than the mesh size of second filter hopper, the inside of first filter hopper and second filter hopper is equipped with fixed part, fixed part suspends and fixes first filter hopper in the inside of second filter hopper, the inside of first filter hopper also has spacer piece sliding;The technical scheme passes through double-layer filtration and separation structure, solves the problem that traditional single-layer filter screen cannot consider different particle size raw material filtration, is easy to block and impurity interception is not thorough.

Description

Technical Field

[0001] This utility model relates to the field of filter bucket technology, specifically a filter screen for a plastic raw material drying hopper. Background Technology

[0002] In the plastics processing industry, plastic dryers are key equipment for ensuring the molding quality of plastic raw materials. They remove moisture from the raw materials through hot air circulation, preventing defects such as bubbles and cracks caused by moisture evaporation during injection molding and extrusion. The filter hopper, as the core pre-treatment component of the dryer, is usually installed at the front end of the channel where the raw materials enter the drying chamber. Its main function is to pre-filter the input plastic raw materials, intercepting foreign objects such as metal scraps, plastic lumps, and fiber impurities. This prevents these impurities from entering the drying system and causing equipment wear or affecting the purity of the raw materials, thereby ensuring the quality stability of the subsequently molded products.

[0003] Currently, most filter screens in plastic dryers on the market adopt a single-layer structure design, typically a metal mesh with a single mesh size. Due to the significant differences in particle size and diverse impurity forms among plastic raw materials, a single-layer filter with a larger mesh size, while able to pass through large-diameter raw materials, cannot effectively intercept fine impurities. Conversely, a smaller mesh size, while filtering fine impurities, is easily clogged by large-diameter raw materials or agglomerates, leading to poor material flow and reduced drying efficiency. Furthermore, the single-layer filter's ability to intercept impurities is limited; some irregularly shaped impurities may pass through the mesh gaps, still affecting subsequent processes. Therefore, the filtration effect of a single-layer filter structure is poor, making it difficult to simultaneously meet the filtration needs of raw materials with different particle sizes and ensure thorough impurity interception, becoming a significant factor restricting the quality of plastic raw material pretreatment. Utility Model Content

[0004] The purpose of this invention is to provide a filter screen for a plastic raw material drying hopper to solve the problems mentioned in the background art.

[0005] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0006] A filter screen for a plastic raw material drying hopper includes a first filter hopper and a second filter hopper. The first filter hopper is suspended inside the second filter hopper, and the distance between the first and second filter hoppers is equal at all points. The first filter hopper is suspended and the spacing is uniform, ensuring that the raw material can smoothly enter the second filter hopper and avoid accumulation and blockage. The mesh size of the first filter hopper is larger than that of the second filter hopper. The first and second filter hoppers form a double-layer filtration structure, and the larger mesh size of the first filter hopper can first intercept large-sized impurities, while the second filter hopper filters out fine impurities, taking into account the filtration needs of raw materials with different particle sizes and solving the problem of poor filtration effect of single-layer filter screens. Both the first and second filter hoppers are equipped with fixing components inside, which fix the suspended first filter hopper inside the second filter hopper. The first filter hopper also has a sliding separator inside. The fixing components ensure the stability of the double-layer filter hopper structure, and the separator can separate the materials to prevent the raw materials from accumulating and affecting the filtration efficiency.

[0007] Furthermore, the fixing component includes a threaded sleeve installed at the center of the bottom of the first filter bucket, and a through hole is provided at the center of the bottom of the first filter bucket. The fixing component also includes a threaded rod installed at the center of the bottom of the second filter bucket. The threaded rod passes through the through hole and is threadedly engaged with the threaded sleeve. The threaded connection between the threaded sleeve and the threaded rod can securely fix the first filter bucket and the second filter bucket, ensuring that the distance between them is uniform and avoiding shaking that affects filtration. The detachable structure makes it easy to disassemble, clean or replace the filter bucket, making operation convenient and maintenance costs low.

[0008] Furthermore, the separator includes a separator filter hopper, which is an inverted cone and slides vertically within the first filter hopper. Four sets of crossbars are evenly spaced along the side of the separator filter hopper, and the free ends of the four sets of crossbars are in contact with the side of the first filter hopper. The inverted cone separator filter hopper can disperse the raw material in all directions, avoiding concentrated accumulation in the center of the first filter hopper, so that the raw material is evenly distributed on the mesh, improving filtration efficiency. The crossbars ensure that the separator filter hopper slides stably within the first filter hopper and does not affect the passage of the raw material through the mesh.

[0009] Furthermore, a support ring is installed on the top surface of the second filter hopper, and the inner side of the support ring fits into the side of the first filter hopper. The support ring serves as a support structure for the filter screen as a whole placed inside the plastic dryer, so that the filter screen is stably connected to the dryer hopper and avoids shaking. The fitting design can prevent raw materials from leaking out from the top gap between the first and second filter hoppers, ensuring that all raw materials undergo double-layer filtration.

[0010] Furthermore, a sealing ring is installed on the side of the first filter bucket, and the sealing ring is in contact with the inner side of the second filter bucket. The sealing ring fills the gap between the first filter bucket and the second filter bucket to prevent unfiltered raw materials from directly entering the bottom of the second filter bucket from the side gap, ensuring that the raw materials must be filtered through a double-layer filter screen, thereby improving filtration reliability.

[0011] Furthermore, the mesh size of the separating filter bucket is the same as that of the first filter bucket, and the height of the separating filter bucket is half the height of the first filter bucket. The same mesh size ensures that the separating filter bucket does not obstruct the passage of raw materials through the first filter bucket, but only serves a separating function. The height of the separating filter bucket is half that of the first filter bucket, which ensures the separating effect of the separating filter bucket without taking up too much space.

[0012] Furthermore, the first filter hopper, the second filter hopper, and the separating filter hopper are all made of metal. Metal materials have high strength and high temperature resistance, and can withstand the working environment of the drying hopper and the impact of raw materials, thus extending their service life.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This plastic raw material drying hopper filter screen, through its double-layer filtration and separation structure, solves the problems of traditional single-layer filter screens being unable to simultaneously filter raw materials of different particle sizes, being prone to clogging, and not completely intercepting impurities: the first filter hopper intercepts large impurities, while the second filter hopper filters fine impurities, achieving graded filtration; the separating filter hopper disperses the raw materials, preventing accumulation and clogging; the fixing parts and support rings ensure structural stability, and the sealing ring prevents bypass, ensuring that all raw materials undergo double-layer filtration, significantly improving the filtration effect and drying efficiency, and guaranteeing the purity of the plastic raw materials. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the filter screen of the plastic raw material drying hopper disclosed in an embodiment of the present utility model;

[0015] Figure 2 This is a first exploded structural diagram of the filter screen of the plastic raw material drying hopper disclosed in this embodiment of the utility model;

[0016] Figure 3 This is a second exploded view of the filter screen of the plastic raw material drying hopper disclosed in an embodiment of the present utility model;

[0017] Figure 4 This is a cross-sectional structural diagram of the filter screen of the plastic raw material drying hopper disclosed in an embodiment of this utility model;

[0018] Figure 5 for Figure 4 A magnified schematic diagram of structure A in the middle.

[0019] In the diagram: 1. First filter bucket; 2. Second filter bucket; 3. Separating filter bucket; 4. Crossbar; 5. Support ring; 6. Threaded sleeve; 7. Threaded rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 - Figure 5 This utility model provides a technical solution: a filter screen for a plastic raw material drying hopper, comprising a first filter hopper and a second filter hopper. The first filter hopper is suspended inside the second filter hopper, and the distance between the first and second filter hoppers is equal at all points. The mesh size of the first filter hopper is larger than that of the second filter hopper. Both the first and second filter hoppers are equipped with fixing members inside, which secure the suspended first filter hopper to the inside of the second filter hopper. A sliding separator is also provided inside the first filter hopper. In the working process of the plastic dryer, the plastic raw material to be dried is fed in from above the hopper. The raw material first enters the first filter hopper: the separator disperses the concentrated raw material into multiple streams, making them evenly cover the mesh surface of the first filter hopper. Large impurities are intercepted by the first filter hopper, while raw materials that meet the mesh size and small impurities fall through the mesh into the gap between the first and second filter hoppers. Subsequently, the raw material continues to flow downwards and is filtered through the small mesh of the second filter hopper, where small impurities are intercepted. The pure plastic raw material enters the drying chamber of the dryer through the second filter hopper, where moisture is removed under the action of hot air circulation. The intercepted impurities are retained in the double-layer filter hopper and cleaned after the machine is stopped to prevent impurities from entering the drying system and affecting the operation of the equipment and the quality of the raw materials.

[0022] As an embodiment of this utility model, the fixing member further includes a threaded sleeve installed at the center of the bottom of the first filter bucket, and a through hole is provided at the center of the bottom of the first filter bucket. The fixing member also includes a threaded rod installed at the center of the bottom of the second filter bucket. The threaded rod passes through the through hole and is threadedly engaged with the threaded sleeve. By screwing the threaded rod through the through hole and the threaded sleeve, the first filter bucket is suspended and fixed in the second filter bucket, ensuring the stability of the double-layer filtration structure.

[0023] As an embodiment of this utility model, the separator further includes a separator filter bucket, which is an inverted cone and slides vertically inside the first filter bucket. Four sets of crossbars are evenly spaced on the side of the separator filter bucket, and the free ends of the four sets of crossbars are in contact with the side of the first filter bucket. After the raw material falls on the separator filter bucket, it slides along the cone surface to the surrounding area. The area separated by the crossbars is evenly distributed on the first filter bucket, thereby accelerating the filtration speed.

[0024] As an embodiment of this utility model, a support ring is further installed on the top surface of the second filter bucket, and the inner side of the support ring is in contact with the side of the first filter bucket. The outer side of the support ring is mounted on the edge of the feed chamber of the dryer to fix the filter screen as a whole; the inner side is in contact with the side of the first filter bucket to restrict its lateral movement, and together with the bottom fixing part, a stable double-layer filter structure is formed.

[0025] As an embodiment of this utility model, a sealing ring is further installed on the side of the first filter bucket, and the sealing ring is in contact with the inner side of the second filter bucket. The sealing ring fills the gap and blocks the bypass path, so that the raw material can only be filtered through the mesh of the first filter bucket and the second filter bucket.

[0026] As an embodiment of this utility model, the mesh size of the separating filter bucket is the same as that of the first filter bucket, and the height of the separating filter bucket is half the height of the first filter bucket. The mesh of the separating filter bucket allows the raw material to pass through, and its height is adapted to the first filter bucket, so that the raw material can smoothly enter the filtration area after being dispersed.

[0027] As an embodiment of this utility model, the first filter bucket, the second filter bucket, and the dividing filter bucket are all made of metal. The rigidity of the metal ensures the stability of the mesh shape, and the high temperature resistance adapts to the drying hot air environment, ensuring long-term stable filtration.

[0028] It should be noted that all standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a control cabinet. The control circuit can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Furthermore, since this application is mainly used to protect mechanical devices, this application will not explain the control method and circuit connection in detail.

Claims

1. A filter screen for a plastic raw material drying hopper, characterized in that, It includes a first filter bucket (1) and a second filter bucket (2). The first filter bucket (1) is suspended inside the second filter bucket (2), and the distance between the first filter bucket (1) and the second filter bucket (2) is equal everywhere. The mesh size of the first filter bucket (1) is larger than that of the second filter bucket (2). Both the first filter bucket (1) and the second filter bucket (2) are provided with fixing members inside. The fixing members fix the suspended first filter bucket (1) inside the second filter bucket (2). The first filter bucket (1) is also provided with sliding partitions inside.

2. The filter screen for a plastic raw material drying hopper according to claim 1, characterized in that, The fixing component includes a threaded sleeve (6) installed at the center of the bottom of the first filter bucket (1), and a through hole is provided at the center of the bottom of the first filter bucket (1). The fixing component also includes a threaded rod (7) installed at the center of the bottom of the second filter bucket (2), and the threaded rod (7) passes through the through hole and is threadedly engaged with the threaded sleeve (6).

3. The filter screen for a plastic raw material drying hopper according to claim 1, characterized in that, The separator includes a separator filter hopper (3), which is an inverted cone and slides vertically inside the first filter hopper (1). Four sets of crossbars (4) are installed at equal intervals around the side of the separator filter hopper (3), and the free ends of the four sets of crossbars (4) are in contact with the side of the first filter hopper (1).

4. The filter screen for a plastic raw material drying hopper according to claim 1, characterized in that, A support ring (5) is installed on the top surface of the second filter bucket (2), and the inner side of the support ring (5) is in contact with the side of the first filter bucket (1).

5. The filter screen for a plastic raw material drying hopper according to claim 1, characterized in that, A sealing ring is installed on the side of the first filter bucket (1), and the sealing ring is in contact with the inner side of the second filter bucket (2).

6. The filter screen for a plastic raw material drying hopper according to claim 3, characterized in that, The mesh size of the dividing filter (3) is the same as that of the first filter (1), and the height of the dividing filter (3) is half the height of the first filter (1).

7. A filter screen for a plastic raw material drying hopper according to claim 3, characterized in that, The first filter bucket (1), the second filter bucket (2), and the separating filter bucket (3) are all made of metal.

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