Screen changing device for cast film

Abstract

The utility model discloses a screen changing device for a cast film, and relates to the technical field of cast film screen changing, an existing double-cylinder screen changer is improved, two mandrels which are transversely arranged side by side in a left-right mode are changed into two mandrels which are longitudinally arranged in a front-back mode, multi-layer filtering is achieved, and a single mandrel is added to two filtering hole positions from one filtering hole position. And one filtering hole site is exposed outside the main body block, so that the filter screen can be conveniently mounted outside, the screen replacing efficiency is improved, the position of the mandrel is gradually adjusted in the switching process, and multiple filtering effects can still be achieved in the screen replacing process.

Description

Technical Field

[0001] The utility model relates to the technical field of screen changing for cast films, in particular to a screen changing device for cast films. Background Art

[0002] Casting is a plastic film production process, which first uses an extruder to plasticize and melt the raw materials. It is then extruded through a T-shaped molding die and cast in sheet form onto the surface of a steadily rotating cooling roller. The film is cooled and shaped on the cooling roller, and then the product is rolled up after being pulled and trimmed.

[0003] During the production of cast film, the filter mesh is not effective and needs to be replaced frequently. Poor filtering effect will lead to the presence of black spots, holes and crystal points in the cast film. The double-cylindrical screen changer currently used is filtered by two core shafts arranged side by side horizontally. When replacing the filter, one of the core shafts needs to be pulled out to replace the mesh and then put back to complete the screen change. During the screen change, the mesh on the other core shaft is supported alone, and the filtering problem during this period is further amplified, and the loss of the mesh on the other core shaft will also increase. Utility Model Content

[0004] In order to solve the technical problems existing in the background technology, the utility model provides a screen changing device for cast film.

[0005] The utility model proposes a screen changing device for cast film, comprising a main body block, a material trough is provided on one side of the main body block, two lifting mechanisms are provided on the main body block, a filtering mechanism is installed on the lifting mechanism, the lifting mechanism is used to drive the filtering mechanism to rise and fall, the filtering mechanism is used to filter the feed in the material trough, two filter troughs are provided on the main body block, the filter trough is communicated with the material trough, and the filter mechanism is located in the filter trough.

[0006] Preferably, the filter troughs and the material troughs are distributed in a cross shape.

[0007] Preferably, the lifting mechanism comprises a fixed plate, and a pushing member is installed on the fixed plate, and the pushing member is used to drive the filtering mechanism to rise and fall, and a plurality of telescopic rods are installed between the fixed plate and the main body block.

[0008] Preferably, the pushing member is a hydraulic cylinder.

[0009] Preferably, the filtering mechanism comprises a core shaft, and one end of the core shaft is mounted on the output shaft of the pusher, the core shaft is provided with two filtering holes, and a filter net is detachably connected in the filtering holes, and the other end of the core shaft passes through the filter tank and extends to the outside of the main block.

[0010] Preferably, the filter screen is connected to the inner wall of the filter hole through a snap-fit ​​slot.

[0011] In the utility model, the screen changing device for cast film proposed has the following beneficial technical effects:

[0012] By improving the existing double-cylinder screen changer, the two core shafts arranged side by side horizontally are changed to be arranged front to back vertically to achieve multi-layer filtration, and the single core shaft is increased from one filter hole position to two filter holes, and one of the filter holes is exposed outside the main block, which is convenient for completing the filter installation on the outside and improving the screen changing efficiency. In addition, the position of the core shaft is gradually adjusted during the switching process, so that multiple filtering effects can be achieved during the screen changing process.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the front view of the structure of the utility model;

[0015] Figure 2 It is a cross-sectional view of the structure of the utility model;

[0016] Figure 3 It is a side view of the structure of the utility model.

[0017] In the figure, 1. main body block; 2. material trough; 3. lifting mechanism; 31. fixing plate; 32. pushing member; 33. telescopic rod; 4. filtering mechanism; 41. core shaft; 42. filtering hole; 43. filtering net; 5. filtering trough. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] like Figure 1-Figure 3 The screen changing device for cast film shown in the figure comprises a main body block, a material trough is provided on one side of the main body block, two lifting mechanisms are provided on the main body block, a filtering mechanism is installed on the lifting mechanism, the lifting mechanism is used to drive the filtering mechanism to rise and fall, the filtering mechanism is used to filter the feed in the material trough, two filtering troughs are provided on the main body block, the filtering troughs are connected with the material trough, and the filtering mechanism is located in the filtering troughs. Both lifting mechanisms are arranged on the top of the main body block and are distributed front and back.

[0020] In an optional embodiment, the filter troughs and the material troughs are distributed in a cross shape.

[0021] A further improvement of the technical solution is that the lifting mechanism includes a fixed plate, and a pushing member is installed on the fixed plate, the pushing member is used to drive the filtering mechanism to lift and lower, and a plurality of telescopic rods are installed between the fixed plate and the main block, and the telescopic rods are existing technology.

[0022] In an optional embodiment, the pushing member is a hydraulic cylinder.

[0023] A further improvement of the technical solution is that the filtering mechanism includes a core shaft, and one end of the core shaft is installed on the output shaft of the pusher, two filter holes are opened on the core shaft, and a filter net is detachably connected in the filter hole, and the other end of the core shaft passes through the filter tank and extends to the outside of the main block.

[0024] In an optional embodiment, the filter screen is connected to the inner wall of the filter hole through a snap-fit ​​slot.

[0025] In an optional embodiment, a sealing ring is installed at the through connection between the core shaft and the filter tank, and the sealing ring is installed on the inner wall of the filter tank.

[0026] In an optional embodiment, the two filter holes are vertically distributed up and down.

[0027] A further improvement of the technical solution is that the lifting mechanism can be replaced by other existing lifting structures that can achieve lifting.

[0028] By improving the existing double-cylinder screen changer, the two core shafts that are arranged side by side horizontally are changed to be arranged front to back vertically, so as to realize multi-layer filtration, and the single core shaft is increased from one filter hole position to two filter holes, and one of the filter holes is exposed outside the main body block, so as to facilitate the installation of the filter screen on the outside and improve the screen changing efficiency. In the switching process, the pushing member drives the core shaft to gradually rise or fall to adjust the position of the core shaft. In this process, one of the filters gradually leaves the main body block, and the other filter gradually enters, so as to realize multiple filtering effects during the screen changing process.

[0029] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0030] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A screen changing device for cast film, comprising a main body block (1), a material trough (2) is provided on one side of the main body block (1), characterized in that: The main body block (1) is provided with two lifting mechanisms (3), and a filtering mechanism (4) is installed on the lifting mechanism (3). The lifting mechanism (3) is used to drive the filtering mechanism (4) to rise and fall, and the filtering mechanism (4) is used to filter the feed in the material trough (2). The main body block (1) is provided with two filtering troughs (5), and the filtering troughs (5) are connected to the material trough (2), and the filtering mechanism (4) is located in the filtering troughs (5).

2. The screen changing device for cast film according to claim 1, characterized in that: The filter tank (5) and the material tank (2) are distributed in a cross shape.

3. The screen changing device for cast film according to claim 1, characterized in that: The lifting mechanism (3) comprises a fixed plate (31), and a pushing member (32) is installed on the fixed plate (31). The pushing member (32) is used to drive the filtering mechanism (4) to rise and fall. A plurality of telescopic rods (33) are installed between the fixed plate (31) and the main body block (1).

4. The screen changing device for cast film according to claim 3, characterized in that: The pushing member (32) is a hydraulic cylinder.

5. The screen changing device for cast film according to claim 3, characterized in that: The filtering mechanism (4) comprises a core shaft (41), and one end of the core shaft (41) is mounted on the output shaft of the pusher (32); two filtering holes (42) are provided on the core shaft (41), and filtering nets (43) are detachably connected in the filtering holes (42); one of the filtering nets (43) is located outside the main body block (1), and the other of the filtering nets (43) is located in the filtering tank (5); the other end of the core shaft (41) passes through the filtering tank (5) and extends to the outside of the main body block (1).

6. The screen changing device for cast film according to claim 5, characterized in that: The filter screen (43) is connected to the inner wall of the filter hole (42) via a buckle slot.

Images