Extrusion forming die for plastic film

Abstract

The utility model discloses an extrusion forming die for a plastic film, which comprises a plasticizing forming component, a forming component, a forming component and an extrusion forming component, wherein the plasticizing forming component comprises a material mixing cavity and an extrusion forming cavity arranged below the material mixing cavity; wherein the side wall of the mixing cavity is provided with at least two feed ports, and the extrusion molding cavity is provided with a strip-shaped outlet groove used for outputting thin film products; a pair of limiting plates is inserted into the side ends, in the two width directions of the outlet groove, of the extrusion molding cavity respectively; the at least two feeding assemblies are used for being connected with the at least two feeding ports in a one-to-one mode; each feeding assembly comprises a conveying pipe connected with the feeding port, a feeding flow adjusting structure connected with the conveying pipe and a feeding pipe connected with the feeding flow adjusting structure. According to the extrusion forming die for the plastic film, the efficiency of different raw materials entering the mixing cavity according to respective dosage can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic film production, in particular to an extrusion molding die for plastic films. Background Art

[0002] Plastic extruder is a commonly used production equipment for processing plastics. In the existing plastic film production process, materials need to be mixed and then extruded. Since other additives or auxiliary materials need to be added to the plastic extruder during production, a special raw material classification and guiding device is generally required for the feeding operation. The use of a special raw material classification and guiding device not only makes the overall plastic extrusion process cumbersome, but also reduces the overall efficiency of the plastic extrusion process.

[0003] Based on the above situation, announcement number CN216860539U discloses a high-efficiency raw material base device for plastic film production, including a combined extrusion component, and a first input component and a second input component connected to the combined extrusion component, the combined extrusion component including a combined extrusion tube, a combined extrusion screw arranged in the combined extrusion tube, and a combined extrusion motor connected to the combined extrusion screw, the first input component and the second input component are respectively connected to the two sides of the combined extrusion tube, and the raw materials are input into the combined extrusion tube and extruded by the combined extrusion screw; the utility model adopts two groups of input components to extrude the material into the combined extrusion tube, and then extrude the input material through the combined extrusion screw, and pre-extrusion treatment is performed before extrusion, which can accelerate the extrusion speed subsequently and has high extrusion efficiency.

[0004] With respect to the above-mentioned disclosed technology, the flow rate of the raw materials in each input component will directly affect the fluid pressure in the extrusion molding barrel. Therefore, it is also necessary to control the flow rate in the input component to facilitate the control of the plasticization time of the fluid and improve the quality stability of the plasticized product.

[0005] In addition, for film products, there are various requirements for the width dimensions required during their processing. Therefore, in order to improve the applicability of the extrusion device to film products of different specifications and sizes, it is necessary to design an adjustable structure for its extrusion molding end. Utility Model Content

[0006] The utility model aims to provide an extrusion molding die for a plastic film, so as to solve the technical problem of optimizing the overall use performance of the extrusion molding die.

[0007] The extrusion molding die for plastic film of the utility model is realized as follows:

[0008] An extrusion molding die for a plastic film, comprising:

[0009] A plasticizing and forming assembly, comprising a mixing chamber and an extrusion molding chamber arranged below the mixing chamber; wherein the side wall of the mixing chamber is provided with at least two feed ports, and the extrusion molding chamber is provided with a strip-shaped outlet slot for outputting the film product; and a pair of limit plates are respectively inserted into the side ends of the two width directions of the outlet slot of the extrusion molding chamber;

[0010] At least two feed components are used to be connected one-to-one with at least two feed ports; each of the feed components includes a feed pipe connected to the feed port, a feed flow regulating structure connected to the feed pipe, and a feed pipe connected to the feed flow regulating structure.

[0011] In an optional embodiment of the utility model, a pair of the limiting plates are movably matched with the extrusion molding cavity; and

[0012] The pair of limit plates are suitable for moving toward and away from each other along the length direction of the outlet slot, so that the width of the film product output from the outlet slot can be adjusted by adjusting the distance between the pair of limit plates.

[0013] In an optional embodiment of the present invention, slots for plugging and mating with limiting plates are respectively provided on the side walls of the extrusion molding cavity and at the side ends in the two width directions of the outlet slot.

[0014] In an optional embodiment of the present invention, scale markings are arranged on the limit plate.

[0015] In an optional embodiment of the present invention, each of the feed inlets is provided with a mounting flange for connecting to a feed conveying pipe.

[0016] In an optional embodiment of the present invention, the assembly flange at each feed port is also equipped with a detachable cover.

[0017] In an optional embodiment of the utility model, the feed flow rate adjustment structure includes: a screen changer flange, a screen changer plate, a flow channel elbow and an adjustment rod; wherein

[0018] The feed port of the screen changing plate is connected to the screen changing device flange, and the discharge port of the screen changing plate is connected to the flow channel elbow, and the flow channel elbow is provided with a horizontal flow channel and a vertical flow channel;

[0019] One end of the horizontal flow channel is connected to the discharge port of the screen changing plate, and the other end of the horizontal flow channel is connected to the vertical flow channel through a curved flow channel, and an adjustment channel for adjusting the movement of the adjustment rod is provided in the flow channel elbow;

[0020] The regulating channel is communicated with the curved flow channel, and the regulating rod is used to adjust the flow rate in the curved flow channel.

[0021] In an optional embodiment of the utility model, a mounting seat is provided on the flow channel elbow, a sealing ring is provided at the connection between the mounting seat and the flow channel elbow, and a sleeve is provided on the mounting seat;

[0022] The adjusting rod is threadedly connected with the sleeve.

[0023] In an optional embodiment of the present invention, a handle cover is provided on the outer periphery of the adjusting rod, and a limiting block is provided at the inner cavity end of the handle cover.

[0024] By adopting the above technical scheme, the utility model has the following beneficial effects: the extrusion molding die for plastic film of the utility model adopts at least two feeding components to enable different raw materials to enter the mixing chamber independently without interfering with each other, thereby improving the efficiency of different raw materials entering the mixing chamber according to their respective amounts, which not only simplifies the overall structure but also improves the flexibility of use. For the extrusion molding die, adjusting the number of feeding components connected to the feeding port of the mixing chamber can meet the different types of raw materials required for different film products in actual production. The use requirements, thereby improving the applicability of the overall extrusion molding die and reducing the equipment cost of the production mold.

[0025] Furthermore, by providing a pair of limit plates on both sides of the discharge trough in the extrusion molding cavity, the width of the film product output from the outlet trough can be adjusted by adjusting the distance between the limit plates. This makes the extrusion molding die of the utility model applicable to a wider range of film products of different sizes, and further improves the applicability of the die to film products of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a first-viewing angle of view of an extrusion molding die for a plastic film of the utility model;

[0027] Figure 2 This is a second perspective structural schematic diagram of the extrusion molding die for plastic film of the utility model;

[0028] Figure 3 It is a third perspective structural schematic diagram of the extrusion molding die for plastic film of the utility model;

[0029] Figure 4 It is a structural schematic diagram of a feed flow regulating structure of an extrusion molding die for a plastic film according to the utility model;

[0030] Figure 5 The utility model is a partial structural schematic diagram of a feed flow regulating structure of an extrusion molding die for plastic film. DETAILED DESCRIPTION

[0031] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0032] Embodiment 1:

[0033] See also Figures 1 to 5 As shown, this embodiment provides an extrusion molding die for a plastic film, comprising: a plasticizing molding component and at least two feeding components connected thereto.

[0034] Specifically, first is the plasticizing and forming component, which includes a mixing chamber 101 and an extrusion molding chamber 102 arranged below the mixing chamber 101; wherein at least two feed ports are provided on the side wall of the mixing chamber 101, and the extrusion molding chamber 102 is provided with a strip-shaped outlet groove 104 for outputting the film product 200; a pair of limit plates 103 are respectively inserted into the side ends of the two width directions of the outlet groove 104 on the extrusion molding chamber 102.

[0035] On the basis of the above structure, further, the side walls of the extrusion molding cavity 102 and the side ends in the two width directions of the outlet slot 104 are respectively provided with slots 105 for plugging and matching the limit plates 103. Here, the limit plates 103 and the slots 105 are movable matching structures, so that a pair of limit plates 103 can be movably matched with the extrusion molding cavity 102. Based on this situation, a pair of limit plates 103 can move toward and away from each other along the length direction of the outlet slot 104, so as to adjust the width of the film product 200 output from the outlet slot 104 by adjusting the distance between the pair of limit plates 103. That is to say, for the film product 200 to be output from the outlet slot 104, it is necessary to first pass through the interval formed by a pair of limit plates 103 in the extrusion molding cavity 102, so that the width of the output film product 200 can be adjusted by adjusting the distance between the pair of limit plates 103.

[0036] Based on the above situation, in an optional implementation, a scale mark is arranged on the limit plate 103. In this way, the length of the limit plate 103 inserted into the extrusion molding cavity 102 can be clearly understood through the scale mark, and thus the spacing dimension between the pair of limit plates 103 can be calculated by subtracting the length of the pair of limit plates 103 inserted into the extrusion molding cavity 102 from the total length of the outlet slot 104, and the spacing dimension is also the width dimension of the film product 200 finally output.

[0037] Next, let's talk about the feeding components. In this embodiment, the feeding components correspond one-to-one to the feeding ports on the mixing chamber 101, and from a structural point of view, each feeding component includes a feeding pipe 108 connected to the feeding port, a feed flow regulating structure 107 connected to the feeding pipe 108, and a feeding pipe connected to the feed flow regulating structure 107.

[0038] Based on the above situation, in order to facilitate the disassembly and assembly of the mixing chamber 101 and the feeding assembly, each feeding port is provided with a mounting flange 106 for connecting the feeding pipe 108. When some feeding ports do not need to be connected to the feeding assembly, a detachable cover is provided at the mounting flange 106 at each feeding port, and the cover is used to block the feeding port.

[0039] In summary, for the extrusion molding die for plastic film of the present embodiment, the use of at least two feeding components can improve the efficiency of different raw materials entering the mixing chamber 101 according to their respective amounts, which not only simplifies the overall structure but also improves the flexibility of use. For the extrusion molding die, adjusting the number of feeding components connected to the feed port of the mixing chamber 101 can meet the different types of raw materials required for different film products 200 in actual production. The usage requirements, thereby improving the applicability of the overall extrusion molding die and reducing the equipment cost of the production mold.

[0040] Embodiment 2:

[0041] See also Figure 4 and Figure 5 As shown, based on the extrusion molding die for plastic film of Example 1, the feed flow rate regulating structure adopted by the extrusion molding die for plastic film provided in this embodiment includes: a screen changer flange 71, a screen changer plate 72, a flow channel elbow 73 and an adjusting rod 74. The feed port of the screen changer plate 72 is connected to the screen changer flange 71, and the discharge port of the screen changer plate 72 is connected to the flow channel elbow 73. The screen changer plate 72 is a finished component and is used to filter impurities in the fluid. A horizontal flow channel 731 and a vertical flow channel 732 are provided in the flow channel elbow 73. One end of the horizontal flow channel 731 is connected to the discharge port of the screen changing plate 72, and the other end of the horizontal flow channel 731 is connected to the vertical flow channel 732 through the curved flow channel 733. A mounting seat 76 is provided on the flow channel elbow 73, and a sealing ring 77 is provided at the connection between the mounting seat 76 and the flow channel elbow 73. A sleeve 78 is provided on the mounting seat 76, and the adjusting rod 74 is threadedly connected to the sleeve 78. An adjusting channel for moving the adjusting rod 74 is provided in the flow channel elbow 73, and the adjusting channel is connected to the curved flow channel 733. The adjusting rod 74 is used to adjust the flow rate in the curved flow channel 733.

[0042] When the fluid in the feed pipe 6 passes through the screen plate 72 and enters the channel elbow 73, the adjustment rod 74 can be rotated to control the size of the outlet of the channel elbow 73 to control the fluid pressure in the entire feed pipe 6. The more the adjustment rod 74 enters the horizontal channel 731, the smaller the flow rate in the curved channel 733, the greater the fluid pressure in the feed pipe 6, and the longer the plasticization time of the raw material in the feed pipe 6. The longer the plasticization time, the better the plasticization effect. However, if the plasticization time is too long, the raw material will be carbonized, affecting the product quality. Therefore, the plasticization time must just meet the requirements. The preferred pressure size of this embodiment is 5-8MPa to ensure that the raw material can be better plasticized in the feed pipe 6 and enter the mixing chamber in the best state.

[0043] Furthermore, a mounting seat 76 is provided on the flow channel elbow 73, and a sealing ring 77 is provided at the connection between the mounting seat 76 and the flow channel elbow 73 to prevent the fluid from overflowing from the adjusting rod 74. A sleeve 78 is provided on the mounting seat 76, and the adjusting rod 74 is threadedly connected with the sleeve 78, so that the adjusting rod 74 can rotate and move inside the sleeve 78.

[0044] A handle cover 741 is provided on the outer periphery of the adjusting rod 74 , and the handle cover 741 is convenient for rotating the adjusting rod 74 . A limiting block 742 is provided at the inner end of the handle cover 741 for limiting the movement of the adjusting rod 74 .

[0045] In addition, in an optional implementation, a first pressure sensor 75 is provided at the feed port of the screen changing plate 72 , and the first pressure sensor 75 monitors the fluid pressure in the barrel 6 in real time.

[0046] This embodiment adjusts the flow rate in the curved flow channel in the flow channel elbow by rotating the adjusting rod, thereby controlling the fluid pressure in the feed pipe, thereby controlling the plasticizing time of the fluid, improving the plasticizing effect of the fluid, and making the final extruded film product 200 better in quality.

[0047] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0048] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0051] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0052] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. An extrusion molding die for a plastic film, characterized in that: include: A plasticizing and forming assembly, comprising a mixing cavity and an extrusion forming cavity arranged below the mixing cavity; The side wall of the mixing cavity is provided with at least two feed ports, and the extrusion molding cavity is provided with a strip-shaped outlet slot for outputting the film product; a pair of limit plates are respectively inserted into the side ends of the two width directions of the outlet slot of the extrusion molding cavity; At least two feed components are used to be connected one-to-one with at least two feed ports; each of the feed components includes a feed pipe connected to the feed port, a feed flow regulating structure connected to the feed pipe, and a feed pipe connected to the feed flow regulating structure.

2. The extrusion molding die for plastic film according to claim 1, characterized in that: A pair of the limiting plates are movably matched with the extrusion molding cavity; and The pair of limit plates are suitable for moving toward and away from each other along the length direction of the outlet slot, so that the width of the film product output from the outlet slot can be adjusted by adjusting the distance between the pair of limit plates.

3. The extrusion molding die for plastic film according to claim 1 or 2, characterized in that: The side walls of the extrusion molding cavity and the side ends in the two width directions of the outlet slot are respectively provided with slots for inserting and matching the limiting plates.

4. The extrusion molding die for plastic film according to claim 3, characterized in that: The limit plate is provided with scale marks.

5. The extrusion molding die for plastic film according to claim 1, characterized in that: Each of the feed inlets is provided with a mounting flange for connecting a feed conveying pipe.

6. The extrusion molding die for plastic film according to claim 5, characterized in that: The assembly flange at each feed inlet is also equipped with a detachable cover.

7. The extrusion molding die for plastic film according to claim 1, characterized in that: The feed flow rate adjustment structure includes: a screen changer flange, a screen changer plate, a flow channel elbow and an adjustment rod; wherein The feed port of the screen changing plate is connected to the screen changing device flange, and the discharge port of the screen changing plate is connected to the flow channel elbow, and the flow channel elbow is provided with a horizontal flow channel and a vertical flow channel; One end of the horizontal flow channel is connected to the discharge port of the screen changing plate, and the other end of the horizontal flow channel is connected to the vertical flow channel through a curved flow channel, and an adjustment channel for adjusting the movement of the adjustment rod is provided in the flow channel elbow; The regulating channel is communicated with the curved flow channel, and the regulating rod is used to adjust the flow rate in the curved flow channel.

8. The extrusion molding die for plastic film according to claim 7, characterized in that: A mounting seat is provided on the flow channel elbow, a sealing ring is provided at the connection between the mounting seat and the flow channel elbow, and a sleeve is provided on the mounting seat; The adjusting rod is threadedly connected with the sleeve.

9. The extrusion molding die for plastic film according to claim 8, characterized in that: A handle cover is arranged on the outer periphery of the adjusting rod, and a limiting block is arranged on the inner cavity end of the handle cover.

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