Casting co-extrusion die head for colored vertical stripe decorative film

Abstract

The utility model discloses a casting co-extrusion die head for a colored vertical stripe decorative film, which comprises a die head body and a die lip, the die head body is connected with the die lip, the die head body is composed of an upper die plate and a lower die plate, the opposite surfaces of the upper die plate and the lower die plate are provided with accommodating grooves, the accommodating grooves are internally provided with circulating cavities, and the circulating cavities are communicated with the die lip. The circulation cavity of the upper die plate and the circulation cavity of the lower die plate form a circulation channel, one end of the circulation channel is communicated with the die lip, the other end of the circulation channel is communicated with the feeding port, a plurality of positioning protrusions are arranged on the circulation cavity, a plurality of positioning grooves are formed in the containing groove, and the positioning grooves are matched with the positioning protrusions to form a structure that the circulation cavities are detachably connected with the corresponding containing grooves. By means of the detachable connection mode of the circulation cavity and the containing groove, the circulation cavity can be taken out to be independently treated to be replaced with a clean circulation cavity during maintenance or cleaning, the situation that shutdown time is too long is avoided, production efficiency is improved, and cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of decorative film casting production technology, specifically a casting co-extrusion die for colored vertical stripe decorative film. Background Technology

[0002] In the production of colored vertical striped decorative film, the die head, as a key component, plays a decisive role in the quality and production efficiency of the decorative film. During the co-extrusion process, materials of various colors enter the flow channels inside the co-extrusion die head and finally flow out through the die lip. The flow channels of existing co-extrusion dies are slots carved into the upper and lower templates of the die head, which require cleaning and maintenance over long-term use. However, cleaning and maintaining the internal flow channels of existing co-extrusion dies is inconvenient, requiring machine downtime until cleaning or maintenance is completed, increasing downtime and costs. Furthermore, with the increasing market demand for colored vertical striped decorative film, higher demands are being placed on the efficiency of the production die head.

[0003] Therefore, this patent application is filed. Utility Model Content

[0004] In view of the above, and to solve the problems existing in the prior art, this utility model provides a casting co-extrusion die for colored vertical striped decorative film.

[0005] The technical solution is a casting co-extrusion die head for a colored vertical stripe decorative film, including a die head body and a die lip. The die head body is connected to the die lip. The die head body is composed of an upper template and a lower template. The surfaces of the upper template and the lower template facing each other are provided with receiving grooves. The receiving grooves are provided with flow cavities. The flow cavities of the upper template and the flow cavities of the lower template form a flow channel. One end of the flow channel is connected to the die lip and the other end is connected to the feed port. The flow cavity is provided with multiple positioning protrusions. The receiving grooves are provided with multiple positioning grooves. Each positioning groove cooperates with the positioning protrusion to form a structure in which each flow cavity and the corresponding receiving groove are detachably connected.

[0006] In an optional embodiment, magnetic clasps are provided at the ends of each positioning protrusion and inside the positioning groove.

[0007] In an optional embodiment, the flow cavity has a coat hanger-shaped structure.

[0008] In an optional embodiment, the mold lip includes an upper mold lip and a lower mold lip, wherein the upper mold lip is detachably fixedly connected to the upper template, and the lower mold lip is detachably fixedly connected to the lower template.

[0009] In an optional embodiment, a detachable connecting assembly is provided between the upper mold lip and the upper mold plate. The detachable connecting assembly includes a connecting post, a limiting post, a locking strip, a through hole, and a limiting groove. The connecting post is fixedly connected to the upper mold lip. The limiting post is located outside the connecting post. The locking strip is located at the end of the connecting post and has a locking hook at one end. The locking strip is made of elastic material. The through hole penetrates the upper mold plate. The limiting groove is formed on the inner wall of the through hole and cooperates with the limiting post. The connecting post and the through hole are in a sliding fit. The connecting post drives the locking strip to slide in the through hole by compression until the locking strip is released from compression and the locking hook is locked on the end face of the through hole.

[0010] In an optional embodiment, the upper template is fixedly provided with a sealing piece at the position of the through hole, and the sealing piece is provided with retaining holes on both sides, and the locking hook can be retained in the retaining holes.

[0011] In an optional embodiment, the detachable connecting assembly is provided between the lower die lip and the lower die plate.

[0012] In an optional embodiment, the end of the feed port away from the die lip is connected to a static mixer, which is connected to a plurality of material melt conveying channels.

[0013] In an optional embodiment, the static mixer is located between the upper and lower templates.

[0014] In an optional embodiment, a throttling valve is provided between the feed inlet and the static mixer.

[0015] This utility model provides a casting co-extrusion die for colored vertical stripe decorative film, which has the following advantages compared with the prior art:

[0016] This invention features a detachable connection between the flow cavity and the receiving groove, and utilizes a positioning protrusion and positioning groove for rapid positioning. When cleaning or maintenance is required, the flow channel can be removed and replaced with a clean flow cavity, thereby shortening downtime, improving production efficiency, reducing production costs, and solving the problems of inconvenient cleaning and maintenance of the flow channel and low production efficiency in current cast co-extrusion dies. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the lower half of the casting co-extrusion die head of this utility model;

[0018] Figure 2 This is a schematic diagram of the lower half of the present invention after the flow cavity has been removed;

[0019] Figure 3This is a schematic diagram of the flow cavity structure of this utility model;

[0020] Figure 4 This is a side view of the casting co-extrusion die of this utility model;

[0021] Figure 5 This is a structural diagram of the connecting post, limiting post, and locking strip in the detachable connection assembly of this utility model;

[0022] Figure 6 This is a partial cross-sectional view of the upper template of this utility model;

[0023] Figure 7 for Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0024] In the picture:

[0025] 1-Upper mold plate, 2-Lower mold plate, 3-Accommodation groove, 4-Flow cavity, 5-Upper mold lip, 6-Lower mold lip, 7-Feed port, 8-Positioning protrusion, 9-Positioning groove, 10-Magnetic suction piece, 11-Connecting post, 12-Limiting post, 13-Locking strip, 14-Through hole, 15-Limiting groove, 16-Locking hook, 17-Sealing piece, 18-Holding hole, 19-Static mixer, 20-Throttle valve, 21-Material melt conveying channel. Detailed Implementation

[0026] The technical solutions of various embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0029] Example 1:

[0030] like Figures 1-3 As shown, a co-extrusion die head for a colored vertical striped decorative film includes a die head body and a die lip. The die lip is located on the side of the die head body, and the die head body and the die lip are fixedly connected. The die head body consists of an upper template 1 and a lower template 2. A receiving groove 3 is provided on the opposing surfaces of the upper template 1 and the lower template 2. A flow cavity 4 is placed in the receiving groove 3. The flow cavities 4 of the upper template 1 and the lower template 2 are arranged vertically opposite each other with a certain distance, thus forming a flow channel for different materials to enter and mix. One end of the flow channel is connected to the die lip, and the other end is connected to the feed port 7. Multiple protruding positioning protrusions 8 are provided on the side of each of the two flow cavities 4 near the receiving groove 3. Each positioning protrusion 8 is integrally formed with the flow cavity 4. Multiple positioning grooves 9 are provided in the receiving groove 3. Each positioning groove 9 cooperates with the positioning protrusion 8, and each positioning protrusion 8 can be inserted into the corresponding positioning groove 9, thus forming a structure in which each flow cavity 4 and the corresponding receiving groove 3 are detachably connected.

[0031] In this embodiment, the flow cavity 4 is not integrally formed with the upper template 1 and the lower template 2; they are independent of each other. The positioning protrusion 8 and the positioning groove 9 work together to secure the flow cavity 4 within the receiving groove 3, effectively limiting its movement. When maintenance or cleaning is required, the flow cavity 4 can be removed and replaced with a clean one, minimizing downtime, thus improving production efficiency and reducing costs.

[0032] Even better, magnetic locating pieces 10 are provided at the ends of each locating protrusion 8 and inside the locating groove 9. During installation, the magnetic locating pieces 10 further improve the installation firmness between the locating protrusion 8 and the locating groove 9, thereby enhancing the performance of the co-extrusion die.

[0033] Even better, the flow chamber 4 is designed as a coat hanger-shaped structure. The advantage of this design is that the flow channel gradually widens from the inlet 7, forming a fan shape, which allows the material to be evenly dispersed during the flow process.

[0034] Example 2:

[0035] This embodiment is a further improvement based on Embodiment 1, specifically as follows:

[0036] like Figures 4-7 As shown, the mold lip includes an upper mold lip 5 and a lower mold lip 6. The upper mold lip 5 is detachably fixedly connected to the upper template 1, and the lower mold lip 6 is detachably fixedly connected to the lower template 2. A detachable connecting assembly is provided between the upper mold lip 5 and the upper template 1. The detachable connecting assembly includes a connecting post 11, a limiting post 12, a locking strip 13, a through hole 14, and a limiting groove 15. The connecting post 11 is fixedly connected to the upper surface of the upper mold lip 5 and can be integrally formed with the upper mold lip 5. The limiting post 12 protrudes to the outside of the connecting post 11 and is integrally formed with the connecting post 11, extending along the length direction of the connecting post 11. The locking strip 13 is located at the end of the connecting post 11. Two locking strips 13 are provided, symmetrically arranged along the central axis of the connecting post 11, and each locking strip 13 is also provided with a locking hook 16. The locking hook 16 and the locking strip 13 are made of the same material and are preferably integrally formed. The locking strip 13 is made of an elastic material, such as a plastic or metal with a certain degree of elasticity. The through hole 14 is formed on the upper template 1 and passes through it. The limiting groove 15 is formed on the inner wall of the through hole 14. The limiting groove 15 and the limiting post 12 are engaged in a sliding fit. The connecting post 11 is also engaged with the through hole 14 and can slide within the through hole 14.

[0037] When fixing the upper mold lip 5 and the upper template 1, align the limiting post 12 with the limiting groove 15, manually move the two locking hooks 16 into the through hole 14, and then press the upper template 1 to make the limiting post 12 slide into the limiting groove 15. The locking hooks 16 slide in a squeezing manner within the through hole 14 until the two locking hooks 16 slide out of the through hole 14, the squeezing of the through hole 14 disappears, and the locking strip 13 springs outward by its own elasticity, causing the locking hooks 16 to hook onto the end face of the upper template 1, thereby fixing the upper template 1 and the upper mold lip 5. This fixing connection method is quick and convenient. When disassembling, simply move the locking hooks 16 inward into the through hole 14 and then pull up the upper template 1. There is no need to loosen the fixing screws one by one as in existing disassembly methods, saving time and effort and ensuring a stable connection. This quick connection and disassembly method also facilitates the removal of the flow cavity 4, further improving the convenience of cleaning and maintenance of the internal flow channel, increasing production efficiency, and reducing costs.

[0038] Multiple such detachable connecting components can be installed as needed. During installation, each locking hook 16 is moved, and then the upper template 1 is pressed to fix multiple connecting components together, greatly improving installation efficiency, while also improving disassembly efficiency.

[0039] Better still, a sealing piece 17 is fixedly provided on the upper template 1 at the position of the through hole 14. The sealing piece 17 can be integrally formed with the upper template 1, and through retaining holes 18 are provided on both sides of the sealing piece 17. The retaining holes 18 cooperate with the locking hooks 16, and the locking hooks 16 can be locked in the retaining holes 18. During disassembly, the locking hooks 16 are squeezed from both sides to make them come out of the retaining holes 18 and enter the through hole 14, and then the upper template 1 is lifted to complete the disassembly. In this embodiment, a detachable connecting component is also provided between the lower mold lip 6 and the lower template 2.

[0040] Example 3:

[0041] Based on Example 1 or Example 2, in order to further improve the mixing uniformity of materials of multiple colors, such as Figure 1 , 2 As shown, a static mixer 19 is connected to the end of the feed inlet 7 away from the die lip. The static mixer 19 is located between the upper die 1 and the lower die 2. The static mixer 19 is connected to multiple material melt conveying channels 21. The static mixer 19 is used to promote the full mixing of materials of different colors in the co-extrusion process, while maintaining their respective color boundaries to form clear vertical stripes.

[0042] Even better, a throttle valve 20 is provided between the feed inlet 7 and the static mixer 19, which can precisely adjust the feed speed and flow rate of each material according to production needs.

[0043] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the present invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A casting co-extrusion die for a colored vertical striped decorative film, comprising a die body and a die lip, wherein the die body and the die lip are connected, characterized in that, The die head body is composed of an upper template (1) and a lower template (2). The upper template (1) and the lower template (2) have accommodating grooves (3) on their opposite surfaces. The accommodating grooves (3) are provided with flow cavities (4). The flow cavities (4) of the upper template (1) and the flow cavities (4) of the lower template (2) form a flow channel. One end of the flow channel is connected to the die lip and the other end is connected to the feed port (7). The flow cavity (4) is provided with multiple positioning protrusions (8). The accommodating grooves (3) are provided with multiple positioning grooves (9). Each positioning groove (9) cooperates with the positioning protrusion (8) to form a structure in which each flow cavity (4) and the corresponding accommodating groove (3) are detachably connected.

2. The casting co-extrusion die for a colored vertical striped decorative film according to claim 1, characterized in that, Each of the positioning protrusions (8) and the positioning groove (9) is provided with a magnetic absorbing piece (10).

3. The casting co-extrusion die for a colored vertical striped decorative film according to claim 1, characterized in that, The flow cavity (4) has a coat hanger-type structure.

4. A casting co-extrusion die for a colored vertical striped decorative film according to any one of claims 1 to 3, characterized in that, The mold lip includes an upper mold lip (5) and a lower mold lip (6). The upper mold lip (5) is detachably fixed to the upper template (1), and the lower mold lip (6) is detachably fixed to the lower template (2).

5. The casting co-extrusion die for a colored vertical striped decorative film according to claim 4, characterized in that, A detachable connecting assembly is provided between the upper mold lip (5) and the upper mold plate (1). The detachable connecting assembly includes a connecting post (11), a limiting post (12), a locking strip (13), a through hole (14), and a limiting groove (15). The connecting post (11) is fixedly connected to the upper mold lip (5). The limiting post (12) is located outside the connecting post (11). The locking strip (13) is located at the end of the connecting post (11). A locking hook (16) is provided at one end of the locking strip (13). The strip (13) is made of elastic material. The through hole (14) penetrates the upper template (1). The limiting groove (15) is opened on the inner wall of the through hole (14). The limiting groove (15) cooperates with the limiting post (12). The connecting post (11) is in sliding fit with the through hole (14). The connecting post (11) drives the locking strip (13) to slide in the through hole (14) until the locking strip (13) is released from the pressure and the locking hook (16) is stuck on the end face of the through hole (14).

6. The casting co-extrusion die for a colored vertical striped decorative film according to claim 5, characterized in that, The upper template (1) is fixedly provided with a sealing piece (17) at the position of the through hole (14). The sealing piece (17) has a retaining hole (18) on both sides, and the locking hook (16) can be retained in the retaining hole (18).

7. A casting co-extrusion die for a colored vertical striped decorative film according to claim 5 or 6, characterized in that, The detachable connecting component is provided between the lower mold lip (6) and the lower mold plate (2).

8. The casting co-extrusion die for a colored vertical striped decorative film according to claim 1, characterized in that, The feed inlet (7) is connected to a static mixer (19) at the end away from the die lip. The static mixer (19) is connected to multiple material melt conveying channels (21).

9. A casting co-extrusion die for a colored vertical striped decorative film according to claim 8, characterized in that, The static mixer (19) is located between the upper template (1) and the lower template (2).

10. A casting co-extrusion die for a colored vertical striped decorative film according to claim 8, characterized in that, A throttle valve (20) is provided between the feed inlet (7) and the static mixer (19).

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