Vibrating sifter

Abstract

The utility model provides a kind of vibrating screening machine, including base, screening box, screen;Screening box is elastically connected to the top of the base, its one side is equipped with small diameter master batch discharge port, its right end is equipped with large diameter master batch discharge port and impurity discharge port with up and down link, its side is equipped with vibrating motor mounting seat, its inside is provided with the baffle corresponding with the small diameter master batch discharge port;Screen is set in the inside of the screening box, the screen is sequentially configured as first screening zone and second screening zone along master batch conveying direction, the first screening zone includes several small screen holes, the second screening zone includes several large screen holes, the baffle is corresponding with the abutting line of the first screening zone and the second screening zone;The application can separate small diameter master batch, large diameter master batch and impurity at one time through the different screening zone design of screen, without multiple screening, screening efficiency is improved by more than 50%, meet the master batch grading processing demand.

Description

Technical Field

[0001] This utility model relates to a plastic masterbatch screening device, and more particularly to a vibrating screen. Background Technology

[0002] In industrial production processes such as plastics processing and chemical synthesis, masterbatch serves as a basic raw material, and the uniformity of its particle size directly affects the quality of subsequent products. Currently, the industry commonly uses vibrating screens to classify and screen masterbatch to separate masterbatch of different diameters and impurities.

[0003] Existing vibrating screens mostly adopt single-layer or multi-layer linear vibrating screen structures, which have the following main problems: First, the screening function is limited, and it can usually only achieve binary separation of "qualified masterbatch - impurities". It cannot simultaneously separate two or more masterbatches of different diameters, and multiple screenings are required to meet the grading requirements, resulting in low efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a vibrating screen that can separate masterbatch into three parts on a single machine, improving screening efficiency while also meeting the needs of heat dissipation and masterbatch flow. The technical solution adopted by this utility model is as follows: A vibrating screen includes: Base; The screening box is flexibly connected to the top of the base. A small-diameter masterbatch outlet is provided on one side, and a large-diameter masterbatch outlet and an impurity outlet are connected at the top and bottom of its right end. A vibration motor mounting base is provided on its side, and a baffle corresponding to the small-diameter masterbatch outlet is provided inside. A screen is installed inside the screening box. The screen is configured with a first screening section and a second screening section in sequence along the masterbatch conveying direction. The first screening section includes a number of small screen holes, and the second screening section includes a number of large screen holes. The baffle corresponds to the adjacent line of the first screening section and the second screening section. A cover plate is provided at the left end of the screening box and covers the top of the screening box. The surface of the cover plate is provided with a feed pipe.

[0005] Furthermore, the screening box also includes: An air inlet channel is formed between the cover plate and the left end face of the screening box, corresponding to the space below the screen where the screening box is located.

[0006] Furthermore, the screening box also includes: Several V-shaped support members are correspondingly arranged in the first screening section and spaced apart. The top of any V-shaped support member is connected to the screen and the bottom is connected to the inner bottom surface of the screening box. The pointed corner of the V-shaped support faces the left end of the screening box.

[0007] Furthermore, it also includes vibration damping components respectively arranged on the front and rear sides of the screening box, characterized in that it includes: spring; A lower fixing seat is provided on the base, and the lower end of the spring is sleeved on the lower fixing seat; The upper fixed seat and the connecting bracket are provided. The connecting bracket is disposed on the base and connected to the upper fixed seat. The upper fixed seat is disposed at the bottom of the connecting bracket. The upper end of the spring is sleeved on the upper fixed seat.

[0008] Furthermore, it also includes: Two height extension rods are respectively connected to the front and rear sides of the base, and the top of the height extension rods extends to the top of the cover plate and is provided with a material cylinder support seat.

[0009] Advantages of this utility model: By designing different screening zones on the screen, small-diameter masterbatch, large-diameter masterbatch, and impurities can be separated in one go without multiple screenings, improving screening efficiency by more than 50% and meeting the needs of masterbatch grading processing. The V-shaped support not only provides stable support for the screen, but also disperses the masterbatch to both sides through the V-shaped structure, avoiding screen blockage caused by local accumulation of masterbatch, thus improving screening throughput and ensuring screening continuity. By utilizing the airflow design of the air inlet channel and the screen, the cold air delivered by the blower can directly act on the masterbatch during the screening process, keeping the masterbatch temperature within the normal temperature range. This effectively avoids softening and sticking problems caused by heat accumulation in the masterbatch, ensuring the physical properties of the masterbatch and the screening accuracy. The vibration damping components achieve an elastic connection between the screening box and the base through springs, which greatly absorbs vibration energy and significantly reduces the noise transmitted from vibration to the base and the surrounding environment, while avoiding the impact of vibration on adjacent equipment. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structural composition of this utility model.

[0011] Figure 2 This is a structural diagram for removing the screen.

[0012] In the diagram: 100-base, 200-screening box, 210-small diameter masterbatch outlet, 220-large diameter masterbatch outlet, 230-impurity outlet, 240-vibration motor mounting base, 250-air inlet channel, 260-baffle, 270-V-shaped support, 300-screen, 400-vibration damping assembly, 410-spring, 420-lower fixed base, 430-upper fixed base, 440-connecting bracket, 500-cover plate, 510-feed connecting pipe, 600-height extension rod, 610-material cylinder support base. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0014] Please see the appendix Figure 1 and attached Figure 2 This application proposes a vibrating screen, including a base 100, a screening box 200, a screen 300, and a cover plate 500. The screening box 200 is elastically connected to the top of the base 100. A small-diameter masterbatch outlet 210 is arranged on one side of the screening box 200, and a large-diameter masterbatch outlet 220 and an impurity outlet 230 are connected vertically on the right end of the screening box 200. A vibrating motor mounting seat 240 is arranged on the side of the screening box 200, and a baffle 260 corresponding to the small-diameter masterbatch outlet 210 is arranged inside the vibrating box 200. The screen 300 is arranged in sequence as a first screening section and a second screening section along the masterbatch conveying direction. The first screening section includes a plurality of small screen holes, and the second screening section includes a plurality of large screen holes. The baffle 260 corresponds to the adjacent line of the first screening section and the second screening section. The cover plate 500 is arranged at the left end of the screening box 200 and covers the top of the screening box 200. A feed pipe 510 is arranged on the surface of the cover plate 500.

[0015] The base 100 serves as the supporting foundation for the entire structure. It and the screening box 200 are both arranged in a long strip shape. The screening box 200 is made of steel structure in one piece, with high strength and good resistance to deformation.

[0016] The screening box 200 is designed with an open top. The screen 300 is welded and fixed in the middle of the interior of the screening box 200. A vibrating motor is installed on the vibrating motor mounting base 240. The vibrating motor generates an oblique amplitude from the lower left to the upper right, which conveys the masterbatch that is blocked by the screen 300 when it falls into the screening box 200 from left to right. Small-diameter masterbatch passes through the small screen holes of the first screening section and falls into the bottom of the screening box 200. Finally, it is blocked by the baffle 260 and enters the small-diameter masterbatch outlet 210 for discharge. The remaining masterbatch cannot pass through the small sieve holes. With the vibration of the vibrating motor, it is conveyed into the second screening section. The large-diameter masterbatch passes through the large sieve holes of the second screening section and falls into the bottom of the screening box 200. Finally, it is discharged from the large-diameter masterbatch outlet 220 at the right end of the screening box 200. Because the diameter of the impurities is larger than that of the large sieve holes, they always remain on the screen 300. With the conveying, they are finally discharged from the impurity outlet 230 at the right end of the screening box 200. In this way, the effect of multi-specification screening of a single machine is achieved.

[0017] Optionally, the diameter of the small sieve hole is 2mm, and the sight glass of the large sieve hole is 5mm. The specific diameter of the small and large sieve holes does not need to be displayed; they can be selected according to the diameter of the masterbatch being screened.

[0018] In one specific embodiment, the vibratory motor mounting base 240 is a disc-shaped structure, which is fixedly connected to the bottom of the screening box 200 through a crossbeam and extends to one side of the screening box 200. The vibratory motor mounting base 240 is provided with an oblong mounting groove, and the vibratory motor is detachably connected to the oblong mounting groove by bolts. Therefore, when the vibratory motor is working, it generates an inclined amplitude, driving the masterbatch to vibrate and convey it from the left end to the right end of the screening box 200.

[0019] In one embodiment, the screening box 200 further includes an air inlet channel 250, which is formed between the cover plate 500 and the left end face of the screening box 200, corresponding to the space below the screen 300. Specifically, the inlet of the air inlet channel 250 is used to connect to the outlet pipe of the blower. The airflow enters the screening box 200 from the air inlet channel 250 and flows to the lower side of the double-layer screen 300, and then is discharged upward through the screening holes of the double-layer screen 300 to dissipate heat from the masterbatch on the double-layer screen 300. Utilizing the airflow design of the air inlet channel 250 and the screen 300, the cold air delivered by the blower can directly act on the masterbatch during the screening process, controlling the masterbatch temperature within the normal temperature range, effectively avoiding softening and sticking problems caused by heat accumulation in the masterbatch, and ensuring the physical properties of the masterbatch and the screening accuracy.

[0020] In one embodiment, the screening box 200 further includes a plurality of V-shaped support members 270 correspondingly disposed in the first screening section and arranged at intervals. The top of any V-shaped support member 270 is connected to the screen 300, and the bottom is connected to the inner bottom surface of the screening box 200; wherein the pointed corner of the V-shaped support member 270 faces the left end of the screening box 200. Specifically, at least two rows of the plurality of V-shaped support members 270 are arranged along the masterbatch conveying direction, and the V-shaped support members 270 between the rows are staggered. When the masterbatch passes through the V-shaped support members 270, it is guided and dispersed to the front and rear sides by the V-shaped support members 270 respectively, and finally collects at the baffle 260. The V-shaped support members 270 not only provide stable support for the screen 300, but also disperse the masterbatch to both sides through the V-shaped structure, avoiding the screen hole blockage caused by the local accumulation of masterbatch on the screen, improving the screening throughput and ensuring screening continuity.

[0021] In one specific embodiment, the baffle 260 is arranged at an angle to the masterbatch conveying direction, that is, the baffle 260 is inclinedly arranged inside the screening box 200. The inclined arrangement of the baffle 260 facilitates the masterbatch to gradually enter the small-diameter masterbatch outlet 210 along the inclined surface, and avoids the masterbatch from accumulating at the baffle 260.

[0022] In one embodiment, to achieve the vibration reduction function of the base 100, this application further includes vibration damping components 400 respectively arranged on the front and rear sides of the screening box 200, including a spring 410, a lower fixed seat 420, an upper fixed seat 430, and a connecting bracket 440; the lower fixed seat 420 is disposed on the base 100, and the lower end of the spring 410 is sleeved on the lower fixed seat 420; the connecting bracket 440 is disposed on the base 100 and connected to the upper fixed seat 430, the upper fixed seat 430 is disposed at the bottom of the connecting bracket 440, and the upper end of the spring 410 is sleeved on the upper fixed seat 430.

[0023] In one specific embodiment, four vibration damping components 400 are arranged at the four corners of the base 100. The lower fixed seat 420 and the upper fixed seat 430 provide positioning points for the spring 410. The connecting bracket 440 moves the connection point between the spring 410 and the screening box 200 from the bottom of the screening box 200 to the side of the screening box 200, thereby limiting the installation position of the screening box 200 to a certain extent using the spring 410. When the screening box 200 vibrates under the action of the vibration damping motor, the spring 410 extends and retracts between the lower fixed seat 420 and the upper fixed seat 430, greatly absorbing vibration energy and significantly reducing the noise transmitted to the base 100 and the surrounding environment, while avoiding the impact of vibration on adjacent equipment.

[0024] In one embodiment, to facilitate quick assembly and disassembly of the material cylinder, this application further includes two height extension rods 600, respectively connected to the front and rear sides of the base 100. The top of each height extension rod 600 extends above the cover plate and is provided with a material cylinder support seat 610. The material cylinder is mounted between the two material cylinder support seats 610, so that the outlet at the bottom of the material cylinder is opposite to the feed connector 510, allowing the masterbatch to accurately enter the feed connector 510. After all the masterbatch has fallen into the feed connector 510, the empty material cylinder can be quickly removed from the material cylinder support seat 610, thus enabling rapid material cylinder replacement. The height extension rods 600 meet the height requirements for suspending the material cylinder, and the length of the height extension rods 600 can be selected according to the height of the material cylinder to adapt to different specifications of material cylinders.

[0025] Work process: According to the specifications of the masterbatch to be screened (e.g., small diameter 1-2mm, large diameter 2-5mm) and the height of the barrel (e.g. 500mm), place the barrel on the barrel support 610 so that the discharge port of the barrel is inserted into the feed connecting pipe 510. Start the vibration motor, connect the blower power supply, open the switch valve on the material cylinder, and the masterbatch enters the feed pipe 510 from the material cylinder and falls onto the screen 300; Under the oblique amplitude of the vibrating motor, the masterbatch is conveyed to the right along the screen 300; small-diameter masterbatch with a diameter ≤2mm falls below through the small screen holes of the first screening section, and the V-shaped support 270 disperses the gathered small-diameter masterbatch, which is finally guided by the baffle plate 260 to the small-diameter masterbatch outlet 210 for discharge; large-diameter masterbatch with a diameter of 2-5mm cannot pass through the first screening section and continues to be conveyed to the second screening section, falls below through the 5mm large screen holes, and is discharged from the large-diameter masterbatch outlet 220; impurities with a diameter >5mm cannot pass through the second screening section and continue to be conveyed to the impurity outlet 230 for discharge; The cold air generated by the blower enters the screening box 200 through the air inlet channel 250, flows through the lower side of the screen 300, and then penetrates the masterbatch layer through different screen holes, carrying away the heat generated by friction during the screening of the masterbatch. The hot air is discharged from the top of the screening box 200, so that the temperature of the masterbatch is always kept within the required range to avoid softening and sticking. After screening, turn off the vibrating motor and blower, and clean the masterbatch remaining on the surface of the double-layer screen 300.

[0026] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vibrating screen, characterized in that, include: Base (100); The screening box (200) is elastically connected to the top of the base (100). A small-diameter masterbatch outlet (210) is provided on one side of the box, and a large-diameter masterbatch outlet (220) and an impurity outlet (230) are connected at the top and bottom of the right end of the box. A vibration motor mounting seat (240) is provided on the side of the box, and a baffle (260) corresponding to the small-diameter masterbatch outlet (210) is provided inside the box. A screen (300) is disposed inside the screening box (200). The screen (300) is configured with a first screening section and a second screening section in sequence along the masterbatch conveying direction. The first screening section includes a number of small screen holes, and the second screening section includes a number of large screen holes. The baffle (260) corresponds to the adjacent line of the first screening section and the second screening section. A cover plate (500) is provided at the left end of the screening box (200) and covers the top of the screening box (200). A feed pipe (510) is provided on the surface of the cover plate (500). A number of V-shaped support members (270) are correspondingly arranged in the first screening section and spaced apart. The top of any V-shaped support member (270) is connected to the screen (300), and the bottom is connected to the inner bottom surface of the screening box (200). The V-shaped support (270) has its pointed corner facing the left end of the screening box (200).

2. The vibrating screen as described in claim 1, characterized in that, The screening box (200) also includes: An air inlet channel (250) is formed between the cover plate (500) and the left end face of the screening box (200), corresponding to the space below the screen (300) where the screening box (200) is located.

3. The vibrating screen as described in claim 1 or 2 further includes vibration damping components (400) respectively arranged on the front and rear sides of the screening box (200), characterized in that, include: Spring (410); A lower fixing seat (420) is disposed on the base (100), and the lower end of the spring (410) is sleeved on the lower fixing seat (420); The upper fixed seat (430) and the connecting bracket (440) are provided on the base (100) and connected to the upper fixed seat (430). The upper fixed seat (430) is provided at the bottom of the connecting bracket (440), and the upper end of the spring (410) is sleeved on the upper fixed seat (430).

4. The vibrating screen as described in claim 1, characterized in that, Also includes: Two height extension rods (600) are respectively connected to the front and rear sides of the base (100), and the top of the height extension rod (600) extends to the top of the cover plate and is provided with a material cylinder support seat (610).

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