Raw material screening machine for polyethylene cast film production

Abstract

The utility model belongs to the technical field of screening machines, and particularly relates to a raw material screening machine for polyethylene cast film production, which comprises a screening box, a feeding port is connected to the top end of the screening box, a discharging port is connected to the side wall of the screening box, a base is arranged at the bottom end of the screening box, a first spring is connected to the bottom end of the screening box, and a second spring is arranged at the bottom end of the screening box. The bottom end of the screening box is connected with a vibration motor, a screen is arranged in the screening box, a fixing block is installed in the screening box, the bottom end of the fixing block is connected with a second spring, a limiting block is further installed in the screening box, and the side wall of the screening box is connected with a supporting plate. According to the screening machine, a second spring is matched with a limiting block, then a knocking rod is used, the screen and the limiting block are collided, and therefore raw materials blocking a screen opening are shaken off, the situation that the screen is blocked is avoided, and the screening efficiency of the screening machine is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of screening machines, and in particular relates to a raw material screening machine for producing polyethylene cast film. Background Art

[0002] The process of separating bulk materials into different particle sizes through one or more layers of screens is called screening. Screening machines use the relative movement between bulk materials and the screen surface to allow some particles to pass through the screen holes, and separate materials such as sand, gravel, and crushed stone into different grades according to particle size. The screening process of a screening machine is generally continuous. After the screened raw materials are fed to the screening machine (referred to as the sieve), materials smaller than the size of the screen holes pass through the screen holes, which are called undersize products; materials larger than the size of the screen holes are continuously discharged from the screen surface, which are called oversize products.

[0003] In the production process of polyethylene cast film, the raw materials need to be screened to reduce impurities in the raw materials, and screening machines are used. However, there are still certain shortcomings in the use of screening machines. For example, the raw materials are of different sizes during the screening process, causing some raw materials to be stuck in the mesh of the screen. If not handled in time, the screen will be blocked after a long time, thereby delaying the screening efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a raw material screening machine for the production of polyethylene cast film, aiming to solve the problem in the prior art that when the above-mentioned equipment is in use, the raw materials are of different sizes during the screening process, resulting in some raw materials being stuck in the mesh opening of the screen. If not handled in time, the screen will be blocked after a long time, thereby delaying the screening efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a raw material screening machine for the production of polyethylene cast film, comprising a screening box, the top of the screening box is connected with a feed port, the side wall of the screening box is connected with a discharge port, the bottom end of the screening box is provided with a base, the bottom end of the screening box is connected with a first spring, the bottom end of the screening box is connected with a vibration motor, a screen is provided inside the screening box, a fixed block is installed inside the screening box, the bottom end of the fixed block is connected with a second spring, a limiting block is also installed inside the screening box, the side wall of the screening box is connected with a support plate, the top of the support plate is installed with a servo motor, and the output shaft of the servo motor is connected with a knocking rod.

[0006] As a preferred embodiment of the raw material screening machine for producing polyethylene cast film of the utility model, the bottom end of the first spring is connected to the top end of the base, and six first springs are distributed in a circular row.

[0007] As a preferred raw material screening machine for producing polyethylene cast film of the utility model, the bottom end of the second spring is connected to the top end of the screen, and the top surface of the limit block is attached to the bottom end of the screen.

[0008] As a preferred raw material screening machine for polyethylene cast film production of the utility model, the screen, the fixed block, the second spring and the limit block are each provided with two, and the fixed block, the second spring and the limit block are symmetrical about the transverse center line of the two screens.

[0009] As a preferred raw material screening machine for polyethylene cast film production of the utility model, the side wall of the base is integrally connected with two corresponding protrusions, and the surface of the protrusion is threadedly connected with a threaded rod, and the bottom end of the threaded rod is connected to a support block.

[0010] As a preferred embodiment of the utility model for a raw material screening machine for production, the threaded rod is connected to the base through a protrusion to form a lifting connection.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model cooperates with the second spring and the limit block, and then uses the knocking rod to make the screen collide with the limit block, thereby shaking off the raw materials blocking the mesh opening of the screen, avoiding the blockage of the screen and further improving the screening efficiency of the screening machine;

[0013] 2. The utility model cooperates between the threaded rod and the support block, so that the support block descends and contacts the ground to form support for the base. The stability of the base prevents the screening box connected to the top from tipping over due to the swing of the screening box when working, thereby improving the stability of the screening machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the main structure of the utility model when viewed from above;

[0017] Figure 3 It is a schematic diagram of the main cross-sectional structure of the utility model;

[0018] Figure 4 For the utility model Figure 1 Enlarged structural diagram at A in the middle.

[0019] In the figure: 1. screening box; 2. feed port; 3. discharge port; 4. base; 5. first spring; 6. vibration motor; 7. screen; 8. fixing block; 9. second spring; 10. limit block; 11. support plate; 12. servo motor; 13. knocking rod; 14. bump; 15. threaded rod; 16. support block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1

[0022] See also Figure 1-4 The utility model provides the following technical solutions: a raw material screening machine for the production of polyethylene cast film, comprising a screening box 1, the top of the screening box 1 is connected with a feed port 2, the side wall of the screening box 1 is connected with a discharge port 3, the bottom end of the screening box 1 is provided with a base 4, the bottom end of the screening box 1 is connected with a first spring 5, the bottom end of the screening box 1 is connected with a vibration motor 6, a screen 7 is provided inside the screening box 1, a fixed block 8 is installed inside the screening box 1, the bottom end of the fixed block 8 is connected with a second spring 9, a limiting block 10 is also installed inside the screening box 1, the side wall of the screening box 1 is connected with a support plate 11, the top of the support plate 11 is installed with a servo motor 12, and the output shaft of the servo motor 12 is connected with a knocking rod 13.

[0023] Preferably, the bottom end of the first spring 5 is connected to the top end of the base 4 , and six first springs 5 ​​are distributed in a circular row.

[0024] Preferably, the bottom end of the second spring 9 is connected to the top end of the screen 7 , and the top surface of the limiting block 10 is attached to the bottom end of the screen 7 .

[0025] Preferably, two sieves 7 , two fixing blocks 8 , two second springs 9 and two limiting blocks 10 are provided, and the fixing blocks 8 , the second springs 9 and the limiting blocks 10 are symmetrical about the transverse midline of the two sieves 7 .

[0026] In the embodiment, when the polyethylene cast film raw material is screened, first, the raw material is fed into the screening box 1 through the feed port 2, and at the same time, the vibration motor 6 needs to be started, and then the vibration motor 6 drives the screening box 1 to swing on the top of the base 4 through the elasticity of the first spring 5, and then the raw material fed into the screening box 1 is screened on the screen 7, and then flows out from the discharge port 3 to the outside, and when it is necessary to avoid the screen 7 from being blocked, the servo motor 12 is started at this time, and then the servo motor 12 outputs The output shaft drives the knocking rod 13 to rotate, and then the rotating knocking rod 13 will contact the screen 7 when it is vertical, forming an extrusion on the screen 7, and then the screen 7 will shrink through the second spring 9, and then, when the knocking rod 13 is horizontal, the extrusion on the screen 7 will be released, and then the screen 7 will rebound through the elasticity of the second spring 9, so that the rebounded screen 7 will hit the limit block 10 again, and the raw material blocking the mesh opening of the screen 7 will be shaken off, thereby avoiding the blockage of the screen 7 and further improving the screening efficiency of the screening machine.

[0027] Embodiment 2

[0028] See also Figure 1-4 The side wall of the base 4 is integrally connected with two corresponding protrusions 14 , and the surface of the protrusion 14 is threadedly connected with a threaded rod 15 , and the bottom end of the threaded rod 15 is connected with a supporting block 16 .

[0029] Preferably, the threaded rod 15 is connected to the base 4 via the protrusion 14 to form a lifting connection.

[0030] In the embodiment, according to the description of the above-mentioned embodiment one, when the polyethylene cast film raw material is screened, the threaded rod 15 can be descended along the surface of the protrusion 14, and then the descent of the threaded rod 15 will drive the support block 16 to contact the ground, so that the support block 16 and the threaded rod 15 form a support for the base 4, and then the stability of the base 4 allows the screening box 1 connected to the top to work without being affected by the swing of the screening box 1 and tipping over, thereby improving the stability of the screening machine.

[0031] It should be noted that the electrical equipment described in the article all belong to current mature technologies, so the working principles will not be elaborated in detail. At the same time, the electrical equipment needs to be connected to the corresponding power supply equipment when working, so the working principles will not be elaborated in detail.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A raw material screening machine for polyethylene cast film production, comprising a screening box (1), characterized in that: The top of the screening box (1) is connected to a feed port (2), the side wall of the screening box (1) is connected to a discharge port (3), the bottom of the screening box (1) is provided with a base (4), the bottom of the screening box (1) is connected to a first spring (5), the bottom of the screening box (1) is connected to a vibration motor (6), and a screen (7) is provided inside the screening box (1); A fixing block (8) is installed inside the screening box (1), the bottom end of the fixing block (8) is connected to a second spring (9), a limiting block (10) is also installed inside the screening box (1), a side wall of the screening box (1) is connected to a support plate (11), a servo motor (12) is installed at the top end of the support plate (11), and the output shaft of the servo motor (12) is connected to a knocking rod (13).

2. A raw material screening machine for polyethylene cast film production according to claim 1, characterized in that: The bottom end of the first spring (5) is connected to the top end of the base (4), and six first springs (5) are distributed in a circular row.

3. A raw material screening machine for polyethylene cast film production according to claim 1, characterized in that: The bottom end of the second spring (9) is connected to the top end of the screen (7), and the top surface of the limit block (10) is in contact with the bottom end of the screen (7).

4. A raw material screening machine for polyethylene cast film production according to claim 1, characterized in that: The screen (7), the fixed block (8), the second spring (9) and the limit block (10) are each provided with two, and the fixed block (8), the second spring (9) and the limit block (10) are symmetrical about the transverse center line of the two screens (7).

5. A raw material screening machine for polyethylene cast film production according to claim 1, characterized in that: The side wall of the base (4) is integrally connected with two corresponding protrusions (14), and the surface of the protrusion (14) is threadedly connected with a threaded rod (15), and the bottom end of the threaded rod (15) is connected with a supporting block (16).

6. A raw material screening machine for polyethylene cast film production according to claim 5, characterized in that: The threaded rod (15) is connected to the base (4) in a lifting manner via the protrusion (14).

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