Blanking device for extruder for PET (Polyethylene Terephthalate) film

Abstract

The utility model discloses a blanking device for an extruder for PET (Polyethylene Terephthalate) films. The blanking device comprises a saturated feeding pipe, a starvation feeding pipe, a plurality of blanking pipes, a lower flow divider, a middle flow divider and an upper flow divider, wherein the lower flow divider, the middle flow divider and the upper flow divider are sequentially stacked from bottom to top; a first discharging opening of the lower flow divider is communicated with a feeding opening of the extruder, and the saturated feeding pipe and the starvation feeding pipe are both communicated with the first discharging opening; the second feed opening of the middle flow divider is communicated with the first feed opening of the lower flow divider; a third feed opening of the upper flow divider is communicated with a second feed opening of the middle flow divider; the discharging ends of the multiple discharging pipes are all located above the third feeding port of the upper flow divider. According to the device, corresponding pipelines can be selected for blanking production according to actual production requirements, so that the applicability and convenience of production are greatly improved; and multiple material distribution is arranged, and various colored PET slices are fully mixed according to different proportions, so that the different PET slices are mixed more uniformly, and the color difference of the PET film caused by non-uniform mixing of the colored PET raw material slices is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of material conveying, and more specifically to a material discharge device for an extruder of a PET film. Background Art

[0002] PET film is a transparent, high-strength, high-heat-resistant, high-barrier plastic film, which is widely used in packaging, printing, electronics, construction and other fields. Its manufacturing process and production process mainly include the following steps: Raw material preparation: The main raw material of PET film is polyester resin, generally polyester chips or polyester pre-dried granules are used as raw materials. The raw materials need to be dried before use to ensure the quality of the product. Extrusion molding: The molding of PET film mainly adopts the extrusion method. The dried polyester granules are added to the extruder, and after heating, melting, fusion, plasticization and other processes, the molten polyester material is extruded into a strip film. During the extrusion process, the temperature, speed, extrusion amount and stretching of the extruder need to be strictly controlled to obtain high-quality PET film. Calendering and stretching: The PET film after extrusion molding needs to be calendered and stretched to improve its physical and mechanical properties. During the calendering and stretching process, parameters such as operating temperature and speed need to be controlled to obtain the required film properties. Coating and processing: PET film also needs to be coated and processed during the production process. Common coating processes include silicon coating, PU coating, matte coating, etc. Common processing processes include printing, laser cutting, lamination, etc. Finished product packaging and quality inspection: After the PET film is produced, it needs to be packaged and inspected. The finished product packaging is generally in the form of roll packaging or sheet packaging. The quality inspection mainly includes appearance inspection, physical property testing, chemical property testing, etc.

[0003] Among the above steps, extrusion molding is a relatively critical production step. In this step, whether multiple materials can be mixed evenly and enter the extruder is one of the most concerned issues in the production process, because uneven mixing of multiple materials may affect the color difference of the film and other problems, reducing the quality of the film. For example, when producing colored films (car films), if multiple colored materials are unevenly mixed and enter the extruder, it may cause color difference in the PET film, affecting the quality of the film.

[0004] The prior art, such as the publication number CN104960174A, is entitled a granular hungry saturated Y-shaped feeding device and a hungry feeding method thereof, which discloses that different materials are preliminarily mixed at the lower end of a main pipe, and then the different materials in the branch pipe silo and the main silo are mixed evenly during the extrusion process by an extruder. However, the branch pipe silo and the main silo are simply stacked at the lower end of the main pipe, and the mixing effect is not ideal.

[0005] Therefore, how to provide a feeding device for a PET film extruder with better material mixing effect is a problem that technicians in this field need to solve urgently. Utility Model Content

[0006] In view of this, the utility model provides a feeding device for a PET film extruder with better material mixing effect.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A feeding device for a PET film extruder, comprising a saturated feeding pipe, a hungry feeding pipe, a plurality of feeding pipes, a lower diverter, a middle diverter and an upper diverter stacked in sequence from bottom to top;

[0009] The lower flow divider is fixed on the extruder through a lower mounting frame, a first feed opening of the lower flow divider is connected to a feed opening of the extruder, the saturated feed pipe and the starved feed pipe are both connected to the first feed opening, and an upper mounting frame is fixed on the top of the lower mounting frame;

[0010] The middle flow splitter is fixed at the bottom of the upper mounting frame and is located above the lower flow splitter, and the second feed opening of the middle flow splitter is connected to the first feed opening of the lower flow splitter;

[0011] The upper flow divider is fixed on the top of the upper mounting frame and is located above the middle flow divider, and the third feed opening of the upper flow divider is connected to the second feed opening of the middle flow divider;

[0012] The plurality of feed pipes are all fixed on the bracket, and the feed ends of the plurality of feed pipes are all located above the third feed inlet of the upper diverter.

[0013] It can be known from the above technical scheme that compared with the prior art, the utility model discloses a feeding device for an extruder of PET film, wherein a saturated feeding tube can be added with transparent PET slices, a hungry feeding tube can be added with colored PET slices of a single color, and multiple feeding tubes can be respectively added with colored PET slices of other different colors. In this way, when it is necessary to produce transparent PET film, it is only necessary to add transparent PET slices to the saturated feeding tube and pass through the extruder. When it is necessary to produce a PET film of a single color, such as red, it is only necessary to add red PET slices to the hungry feeding tube and pass through the extruder. When it is necessary to produce a PET film of a certain color prepared by mixing multiple colors, PET slices of corresponding colors are respectively added to multiple feeding tubes. Multiple colored PET slices are mixed evenly after passing through the multiple diversions of the upper diverter, the middle diverter, and the lower diverter in turn, and then enter the extruder. Of course, PET raw material slices can also be added to the saturated feeding tube, the hungry feeding tube, and multiple feeding tubes according to production needs.

[0014] Therefore, the feeding device can select the corresponding pipeline for feeding production according to actual production needs, which greatly improves the applicability and convenience of production; and multiple material diversions are set up to fully mix a variety of colored PET slices in different proportions, so that different PET slices are mixed more evenly, avoiding the color difference of PET film caused by uneven mixing of colored PET raw material slices.

[0015] Furthermore, the lower diverter comprises:

[0016] A lower diverter shell, wherein the lower diverter shell is fixed inside the lower mounting frame, the upper end of the lower diverter shell is open and is the first feed inlet, the lower diverter shell is provided with a first diverter chamber and a second diverter chamber, the adjacent chamber walls of the first diverter chamber and the second diverter chamber are respectively provided with a first diverter notch and a second diverter notch, an inverted V-shaped lower diverter plate is connected between the lower edge of the first diverter notch and the lower edge of the second diverter notch; the lower ends of the first diverter chamber and the second diverter chamber are both the first feed outlet; the lower end of the saturated feeding pipe passes through the lower mounting frame and the lower diverter shell to be connected with the first diverter chamber, and the lower end of the hungry feeding pipe passes through the lower mounting frame and the lower diverter shell to be connected with the second diverter chamber; the second feed outlet extends into the first feed inlet and is located directly above the lower diverter plate.

[0017] The beneficial effect of adopting the above technical scheme is that the material falling onto the lower diverter plate through the second discharge port is dispersed and diverted into the first diverter cavity and the second diverter cavity through the first diverter notch and the second diverter notch, and finally enters the extruder, so that the material can be diverted and mixed again to ensure the uniformity of the material mixing, and the diverted material can also be mixed with the material in the saturated feeding tube and the hungry feeding tube respectively before entering the extruder.

[0018] Further, the middle splitter comprises:

[0019] A middle flow splitting shell, wherein the middle flow splitting shell is fixed to the bottom of the upper mounting frame, the lower end of the middle flow splitting shell is open and serves as the second material discharge port, and the upper end of the middle flow splitting shell is open and serves as the second material inlet port;

[0020] A plurality of inverted V-shaped middle flow dividers are evenly spaced and installed on the second feed inlet.

[0021] The beneficial effect of adopting the above technical solution is that after the material is diverted by the upper diverter, it falls into the inverted V-shaped middle diverter plate for further diversion and falls into the lower diverter through the second discharge port, thereby realizing secondary diversion of different materials.

[0022] Furthermore, the middle split flow shell is a bucket-shaped structure.

[0023] The beneficial effect of adopting the above technical solution is that the material after being diverted by the inverted V-shaped middle diverter plate can slide quickly to the second discharge port by gravity to be gathered, mixed and discharged from the middle diverter shell.

[0024] Furthermore, the upper diverter comprises:

[0025] An upper flow-dividing shell, wherein the upper flow-dividing shell is fixed to the top of the upper mounting frame, the lower end of the upper flow-dividing shell is open and serves as the third material discharge port, and the upper end of the upper flow-dividing shell is open and serves as the third material inlet;

[0026] A plurality of inverted V-shaped first upper splitter plates are evenly spaced and installed on the third feed inlet.

[0027] The beneficial effect of adopting the above technical solution is that different colored PET slices from multiple feeding tubes are diverted by the first upper diverter plate in an inverted V shape and then fall into the middle diverter through the third feeding port, thereby realizing the first diversion of different materials.

[0028] Furthermore, side panels are fixed on both side ends of the third feed port, and an inverted V-shaped second upper diverter plate is fixed between the two side plates. The gaps on both sides of the third feed port and the second upper diverter plate are diversion feed ports, and the diversion feed ports are located above the middle diverter plate.

[0029] The beneficial effect of the above technical solution is that the material after being diverted by the first upper diverter plate in an inverted V shape can enter the middle diverter after being diverted again by the second upper diverter plate in an inverted V shape. Therefore, the upper diverter can perform double diversion on the material, thereby improving the subsequent mixing effect of the material.

[0030] Furthermore, the upper flow-dividing shell is a bucket-shaped structure.

[0031] The beneficial effect of adopting the above technical solution is that the material after being diverted by the inverted V-shaped first upper diverter plate can slide quickly to the third discharge port by gravity to be gathered, mixed and discharged from the upper diverter shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 The utility model provides a structural schematic diagram of a feeding device for a PET film extruder.

[0034] Figure 2 It is a schematic diagram of the overall assembly structure of the saturated feeding tube, the starved feeding tube and the lower diverter.

[0035] Figure 3 It is a side view schematic diagram of the perspective structure of the lower diverter, middle diverter and upper diverter assembly.

[0036] Figure 4 It is a front view schematic diagram of the perspective structure of the lower diverter, middle diverter and upper diverter assembly.

[0037] Figure 5 It is a perspective schematic diagram of the main structure of the upper diverter.

[0038] Figure 6 It is a perspective schematic diagram of the side view structure of the upper diverter.

[0039] Figure 7 It is a schematic diagram of the top view of the structure in which the feed pipe is arranged on the top of the upper diverter.

[0040] Figure 8 It is a perspective schematic diagram of the main structure of the middle diverter.

[0041] Fig. 9 It is a perspective schematic diagram of the side view structure of the middle diverter.

[0042] Fig.10 It is a perspective schematic diagram of the main structure of the lower diverter.

[0043] Fig.11 It is a perspective schematic diagram of the side view structure of the lower diverter.

[0044] Fig.12 It is a perspective schematic diagram of the top view structure of the lower diverter. DETAILED DESCRIPTION

[0045] 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.

[0046] like Figure 1-Figure 12 As shown, the embodiment of the utility model discloses a feeding device for a PET film extruder, comprising a saturated feeding tube 1, a hungry feeding tube 2, a plurality of feeding tubes 3, a lower diverter 4, a middle diverter 5 and an upper diverter 6 stacked in sequence from bottom to top;

[0047] The lower flow divider 4 is fixed on the extruder 7 through the lower mounting frame 8, the first feed port 4101 of the lower flow divider 4 is connected with the feed port 71 of the extruder 7, the saturated feed pipe 1 and the starved feed pipe 2 are both connected with the first feed port 4101, and the upper mounting frame 9 is fixed on the top of the lower mounting frame 8;

[0048] The middle flow divider 5 is fixed at the bottom of the upper mounting frame 9 and is located above the lower flow divider 4. The second feed opening 511 of the middle flow divider 5 is connected to the first feed opening 411 of the lower flow divider 4.

[0049] The upper flow divider 6 is fixed on the top of the upper mounting frame 9 and is located above the middle flow divider 5. The third feed opening 611 of the upper flow divider 6 is connected to the second feed opening 512 of the middle flow divider 5.

[0050] The plurality of feed pipes 3 are all fixed on the bracket 10 , and the feed ends of the plurality of feed pipes 3 are all located above the third feed inlet 612 of the upper diverter 6 .

[0051] The lower mounting frame 8 can be mounted at the feed port 71 of the extruder 7 via a flange, and the lower mounting frame 8 and the upper mounting frame 9 can also be quickly disassembled and assembled via the flange.

[0052] For details, see Figure 10-12 , the lower diverter 4 comprises:

[0053] The lower flow dividing shell 41 can be fixed to the lower mounting frame 8 by bolts or welding. The upper end of the lower flow dividing shell 41 is open and is the first material inlet 411. The lower flow dividing shell 41 has a first flow dividing chamber 412 and a second flow dividing chamber 413. The first flow dividing chamber 412 and the second flow dividing chamber 413 are provided with a first flow dividing notch 4121 and a second flow dividing notch 4131 on the adjacent chamber walls. The lower edge of the first flow dividing notch 4121 and the second flow dividing notch 4131 are provided. 1 is connected with an inverted V-shaped lower diverter plate 42; the lower ends of the first diverter cavity 412 and the second diverter cavity 413 are both the first discharge port 4101; the lower end of the saturated feeding pipe 1 passes through the lower mounting frame 8 and the lower diverter shell 41 to communicate with the first diverter cavity 412, and the lower end of the hungry feeding pipe 2 passes through the lower mounting frame 8 and the lower diverter shell 41 to communicate with the second diverter cavity 413; the second discharge port 511 extends into the first feed port 411 and is located directly above the lower diverter plate 42.

[0054] See also Figure 8 and Fig. 9 , the middle splitter 5 comprises:

[0055] The middle split flow housing 51 can be fixed to the bottom of the upper mounting frame 9 by bolts or welding. The lower end of the middle split flow housing 51 is open and serves as a second discharge port 511. The upper end of the middle split flow housing 51 is open and serves as a second feed port 512.

[0056] A plurality of inverted V-shaped middle flow dividers 52 are evenly spaced and installed on the second feed inlet 512 .

[0057] The middle flow-dividing housing 51 is a bucket-shaped structure.

[0058] See also Figure 5 and Figure 6 , the upper shunt 6 comprises:

[0059] The upper flow splitter housing 61 can be fixed to the top of the upper mounting frame 9 by bolts or welding. The lower end of the upper flow splitter housing 61 is open and is the third feed opening 611. The upper end of the upper flow splitter housing 61 is open and is the third feed opening 612.

[0060] A plurality of inverted V-shaped first upper splitter plates 62 are evenly spaced and installed on the third feed inlet 612 .

[0061] Side plates 63 are fixed to both side ends of the third feed opening 611, and an inverted V-shaped second upper diverter plate 64 is fixed between the two side plates 63. The gaps on both sides of the third feed opening 611 and the second upper diverter plate 64 are diverter feed openings 601, and the diverter feed openings 601 are located above the middle diverter plate 52.

[0062] The upper flow-dividing shell 61 is a bucket-shaped structure.

[0063] The utility model takes the production of a certain color of PET film as an example, and its raw materials need transparent PET slices and 5 different colored PET slices. The transparent PET slices are added through the saturated feeding tube 1, and the 4 different colored PET slices are added through the 4 feeding tubes 3, and the 5th colored PET slice is added through the hungry feeding tube 2. First, the 4 different colored PET slices are collected to the upper diverter 6 through the 4 feeding tubes 3, and after preliminary diversion through the 3 inverted V-shaped first upper diverter plates 62 of the upper diverter, they are collected to the bottom of the upper diverter 6, and then diverted to the top of the middle diverter 5 through the 1 inverted V-shaped second upper diverter plate 64, and then diverted for the second time through the 3 inverted V-shaped middle diverter plates 52 at the top of the middle diverter, and then collected to the bottom of the middle diverter 5, and then enter the lower diverter 4, and then through the lower diverter 4. The inverted V-shaped lower diverter plate 42 enters the first diverter chamber 412 and the second diverter chamber 413 in two ways. At the same time, the transparent PET slices enter the first diverter chamber 412 through the saturated feeding tube 1 and are mixed with the material in the chamber. The fifth colored slices enter the second diverter chamber 413 through the hungry feeding tube 2 and are mixed with the material in the chamber. After that, the mixed materials enter the extruder through the first diverter chamber 412 and the second diverter chamber 413 respectively to realize the extrusion molding of the film.

[0064] Therefore, the feeding device can fully mix a variety of colored PET slices in different proportions, so that the different PET slices are mixed more evenly, avoiding the color difference of the PET film caused by uneven mixing of the colored PET raw material slices.

[0065] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0066] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A feeding device for a PET film extruder, characterized in that: It comprises a saturated feeding pipe (1), a hungry feeding pipe (2), a plurality of feeding pipes (3), a lower flow divider (4), a middle flow divider (5) and an upper flow divider (6) which are stacked in sequence from bottom to top; The lower flow divider (4) is fixed on the extruder (7) through a lower mounting frame (8); the first feed opening (4101) of the lower flow divider (4) is connected to the feed opening (71) of the extruder (7); the saturated feed pipe (1) and the starved feed pipe (2) are both connected to the first feed opening (4101); and an upper mounting frame (9) is fixed on the top of the lower mounting frame (8); The middle flow splitter (5) is fixed at the bottom of the upper mounting frame (9) and is located above the lower flow splitter (4); the second feed opening (511) of the middle flow splitter (5) is in communication with the first feed opening (411) of the lower flow splitter (4); The upper flow divider (6) is fixed to the top of the upper mounting frame (9) and is located above the middle flow divider (5); the third feed opening (611) of the upper flow divider (6) is in communication with the second feed opening (512) of the middle flow divider (5); The plurality of feed pipes (3) are all fixed on the bracket (10), and the feed ends of the plurality of feed pipes (3) are all located above the third feed inlet (612) of the upper diverter (6).

2. A feeding device for a PET film extruder according to claim 1, characterized in that: The lower diverter (4) comprises: A lower flow diversion shell (41), wherein the lower flow diversion shell (41) is fixed inside the lower mounting frame (8), the upper end of the lower flow diversion shell (41) is open and serves as the first material inlet (411), the lower flow diversion shell (41) has a first flow diversion chamber (412) and a second flow diversion chamber (413) inside, the first flow diversion chamber (412) and the second flow diversion chamber (413) are respectively provided with a first flow diversion notch (4121) and a second flow diversion notch (4131) on adjacent chamber walls, and a lower edge of the first flow diversion notch (4121) and a lower edge of the second flow diversion notch (4131) are connected to each other. An inverted V-shaped lower diverter plate (42); the lower ends of the first diverter chamber (412) and the second diverter chamber (413) are both the first discharge port (4101); the lower end of the saturated feeding tube (1) passes through the lower mounting frame (8), the lower diverter shell (41) and is connected to the first diverter chamber (412), and the lower end of the hungry feeding tube (2) passes through the lower mounting frame (8), the lower diverter shell (41) and is connected to the second diverter chamber (413); the second discharge port (511) extends into the first feed port (411) and is located directly above the lower diverter plate (42).

3. A feeding device for a PET film extruder according to claim 2, characterized in that: The middle flow divider (5) comprises: A middle flow splitting shell (51), the middle flow splitting shell (51) being fixed to the bottom of the upper mounting frame (9), the lower end of the middle flow splitting shell (51) being open and serving as the second material discharge opening (511), and the upper end of the middle flow splitting shell (51) being open and serving as the second material inlet opening (512); A plurality of inverted V-shaped middle flow dividers (52) are evenly spaced and installed on the second material inlet (512).

4. A feeding device for a PET film extruder according to claim 3, characterized in that: The middle flow-dividing shell (51) is a bucket-shaped structure.

5. A feeding device for a PET film extruder according to claim 3, characterized in that: The upper flow divider (6) comprises: An upper flow-dividing shell (61), the upper flow-dividing shell (61) being fixed to the top of the upper mounting frame (9), the lower end of the upper flow-dividing shell (61) being open and serving as the third material discharge port (611), and the upper end of the upper flow-dividing shell (61) being open and serving as the third material inlet port (612); A plurality of inverted V-shaped first upper splitter plates (62) are evenly spaced and installed on the third feed inlet (612).

6. A feeding device for a PET film extruder according to claim 5, characterized in that: Side plates (63) are fixed to both side ends of the third feed opening (611), and an inverted V-shaped second upper diverter plate (64) is fixed between the two side plates (63). The gaps on both sides of the third feed opening (611) and the second upper diverter plate (64) are diverter feed openings (601), and the diverter feed openings (601) are located above the middle diverter plate (52).

7. A feeding device for a PET film extruder according to claim 5, characterized in that: The upper flow-dividing shell (61) is a bucket-shaped structure.

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