A multilayer polymer film co-extrusion molding equipment and molding method

Abstract

This invention discloses a multilayer polymer film co-extrusion molding equipment and method, relating to the technical field of co-extrusion molding equipment. It includes a discharge frame and an extrusion tube and an inner tube mounted thereon. A first feeding cylinder is fixedly mounted on the extrusion tube, and a base is fixedly mounted on the side wall of the discharge frame. A second feeding cylinder is fixedly mounted on the base. In this invention, a first auger is located on the outer wall of the inner tube, forming a first extrusion channel between the outer wall of the inner tube and the extrusion tube. A second auger is fixedly mounted on an inner rod, forming a second extrusion channel between the inner rod and the inner tube. A heating rod is disposed on the inner tube, allowing simultaneous heating of both the first and second extrusion channels, resulting in more efficient heat utilization. Furthermore, the first and second augers extrude materials from the first and second extrusion channels respectively, thus saving space.

Description

Technical Field

[0001] This invention relates to the field of co-extrusion molding equipment technology, specifically to a multilayer polymer film co-extrusion molding equipment and molding method. Background Technology

[0002] Multilayer polymer films are formed by extruding different plastics or different formulations through multiple extruders, and after reasonable layering, they are extruded and cast through a die head to form a multilayer film with multiple functions.

[0003] During extrusion, some existing extrusion equipment typically melts and heats a single plastic through a single extrusion tube. This means that when extruding multi-layer plastic films, multiple extrusion tubes are required to extrude simultaneously. In this case, multiple extrusion tubes take up a lot of space, and each extrusion tube requires a different heat source to melt, resulting in significant heat waste. Summary of the Invention

[0004] The purpose of this invention is to provide a multilayer polymer film co-extrusion molding equipment and molding method to overcome the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multilayer polymer film co-extrusion molding equipment, comprising a discharge frame and an extrusion tube and an inner tube mounted thereon, wherein a first feeding cylinder is fixedly mounted on the extrusion tube, a base is fixedly mounted on the side wall of the discharge frame, a second feeding cylinder is fixedly mounted on the base, a servo motor is fixedly mounted on the base, a friction disc is fixedly mounted on the output end of the servo motor, a rotating ring is rotatably mounted on the inner wall of the extrusion tube, an inner disc is fixedly mounted on the inner wall of the rotating ring, and an inner rod is fixedly mounted on the inner disc; a first auger is fixedly mounted on the rotating ring, a second auger is fixedly mounted on the inner disc, and a heating rod is fixedly mounted inside the inner tube.

[0006] Preferably, a feeding pipe is fixedly installed at the bottom end of the second feeding cylinder, and the other end of the feeding pipe is connected to the inner rod.

[0007] The inner rod has a feed inlet.

[0008] Preferably, the extrusion tube has a first discharge port and the inner tube has a second discharge port, and both the first discharge port and the second discharge port are connected to the discharge frame.

[0009] The discharge frame is provided with two discharge slots, and the first discharge port and the second discharge port are respectively connected to the two discharge slots.

[0010] Preferably, an elastic pressure plate is installed on the inner top wall of the discharge trough, and a slider is vertically slidably installed on the inner wall of the discharge frame, with a vertical rod fixedly installed at the bottom end of the slider.

[0011] A variable rod is horizontally slidably installed on the side wall of the discharge frame, and a sliding rod is installed on the variable rod;

[0012] An arc-shaped rod is fixedly installed on the inner wall of the discharge frame, a side plate is fixedly installed on the side wall of the arc-shaped rod, a rotating block is rotatably installed on the side plate, and a rotating rod is rotatably installed on the rotating block;

[0013] A screw is threaded onto the arc-shaped rod, and a plug rod that is slidably installed on the rotating rod is inserted into the screw.

[0014] Preferably, a connecting block is fixedly installed on the slide bar, and the connecting block is T-shaped, and the connecting block slides through the middle of the variable rod.

[0015] Preferably, the screw has a square slot, and the size of the screw and the size of the slot are compatible.

[0016] Preferably, a square plate is fixedly installed at one end of the insertion rod inside the rotating rod, a return spring is fixedly installed between the square plate and the rotating rod, and a pull rod is fixedly installed at the end of the square plate away from the insertion rod, and a pull plate is fixedly installed on the pull rod.

[0017] Preferably, a follower block is rotatably mounted on the rotating rod, and the follower block is slidably mounted on the arc-shaped rod, and a stop block is fixedly mounted on the arc-shaped rod.

[0018] The molding method of the multilayer polymer film co-extrusion molding equipment according to any one of the above-mentioned methods includes the following steps:

[0019] S1. Place each material into the first feeding cylinder and the second feeding cylinder respectively;

[0020] S2. Start the servo motor so that it drives the rotating ring to rotate through the friction disc. At this time, the first and second augers will simultaneously convey the materials.

[0021] S3. Convey the molten material into the discharge frame;

[0022] S4. After the molten material enters the discharge frame, it passes through different discharge troughs and the thickness is controlled under each elastic pressure plate before it comes out of the discharge frame.

[0023] In the above technical solution, the present invention provides a multilayer polymer film co-extrusion molding equipment and molding method, which has the following beneficial effects: wherein the first auger is located on the outer wall of the inner tube, and a first extrusion channel is formed between the outer wall of the inner tube and the extrusion tube, and the second auger is fixedly installed on the inner rod, and a second extrusion channel is formed between the inner rod and the inner tube, and the heating rod is set on the inner tube, and the heating rod can heat the first extrusion channel and the second extrusion channel at the same time, so that the heat utilization is more efficient, and the first auger and the second auger extrude the material in the first extrusion channel and the second extrusion channel respectively, so as to save more space. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0025] Figure 1-2 All of these are three-dimensional structural schematic diagrams provided in the embodiments of the present invention;

[0026] Figure 3 This is a partial structural schematic diagram of the elastic pressure plate provided in an embodiment of the present invention;

[0027] Figure 4-5 These are partial structural schematic diagrams of the arc-shaped rod provided in the embodiments of the present invention;

[0028] Figure 6 This is a schematic diagram of the internal structure of the rotating rod provided in an embodiment of the present invention;

[0029] Figure 7 This is a partial structural schematic diagram of the wave plate provided in an embodiment of the present invention;

[0030] Figure 8 This is a partial structural diagram of the inner tube provided in an embodiment of the present invention;

[0031] Figure 9 This is a partial structural diagram of the first auger provided in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Discharge frame; 2. Extrusion tube; 3. First feeding cylinder; 4. Second feeding cylinder; 51. Inner tube; 52. Heating rod; 53. First auger; 54. Second auger; 55. Inner rod; 551. Feed inlet; 56. First discharge outlet; 57. Second discharge outlet; 61. Servo motor; 62. Friction disc; 63. Rotary ring; 64. Inner disc; 71. Elastic pressure plate; 72. Vertical rod; 73. Slider; 74. 75. Slide rod; 76. Variable rod; 77. Arc rod; 78. Side plate; 79. Rotating block; 70. Stop block; 710. Follower block; 81. Elastic pad; 82. Wave plate; 83. Limiting rod; 84. Arc block; 85. Screw; 86. Slot; 87. Connecting block; 91. Rotating rod; 92. Insert rod; 93. Square plate; 94. Return spring; 95. Pull rod; 96. Pull plate; 97. Protrusion; 10. Cutting knife. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0035] Please see Figure 1-9 A multilayer polymer film co-extrusion molding equipment and molding method includes a discharge frame 1 and an extrusion tube 2 and an inner tube 51 installed thereon. A first feeding cylinder 3 is fixedly installed on the extrusion tube 2. A base is fixedly installed on the side wall of the discharge frame 1. A second feeding cylinder 4 is fixedly installed on the base. A servo motor 61 is fixedly installed on the base. A friction disk 62 is fixedly installed at the output end of the servo motor 61. A rotating ring 63 is rotatably installed on the inner wall of the extrusion tube 2. An inner disk 64 is fixedly installed on the inner wall of the rotating ring 63. An inner rod 55 is fixedly installed on the inner disk 64.

[0036] A first auger 53 is fixedly installed on the rotating ring 63, a second auger 54 is fixedly installed on the inner plate 64, and a heating rod 52 is fixedly installed inside the inner tube 51.

[0037] The friction disc 62 and the rotating ring 63 are in contact with each other, and the first auger 53 is located on the outer wall of the inner tube 51. At this time, the outer wall of the inner tube 51 and the extrusion tube 2 form a first extrusion channel, while the second auger 54 is fixedly installed on the inner rod 55. At this time, the inner rod 55 and the inner tube 51 form a second extrusion channel.

[0038] The electric heating rod 52 can heat and melt the material in the first extrusion channel and the second extrusion channel. At the same time, the servo motor 61 is started. The servo motor 61 will drive the friction disk 62 to rotate, and the friction disk 62 will drive the rotating ring 63 to rotate. As the rotating ring 63 rotates, it will drive the first auger 53 and the second auger 54 to rotate, thereby pushing and sending out the material in the first extrusion channel and the second extrusion channel.

[0039] The power supply for the electric heating rod 52 can be supplied through a circuit channel located near the end of the discharge frame 1.

[0040] The rotating ring 63 is partially disposed on the inner wall of the extrusion tube 2, and the size of the rotating ring 63 is adapted to the size of the inner wall of the extrusion tube 2, so that the rotating ring 63 supports one end of the inner rod 55 through the inner plate 64, while the other end of the inner rod 55 is rotatably mounted on the inner tube 51.

[0041] In another embodiment of the present invention: a feeding pipe is fixedly installed at the bottom end of the second feeding cylinder 4, and the other end of the feeding pipe is connected to the inner rod 55;

[0042] The inner rod 55 has a feed inlet 551;

[0043] The feeding pipe and the inner rod 55 are rotatably connected, so that the inner rod 55 can continuously feed when it rotates. Several feeding ports 551 are provided, and several feeding ports 551 are arranged in a circumferential array on the inner rod 55.

[0044] The bottom end of the feeding pipe can be tilted so that the material in the second feeding cylinder 4 flows into the inner rod 55.

[0045] In another embodiment of the present invention: a first discharge port 56 is provided on the extrusion tube 2, and a second discharge port 57 is provided on the inner tube 51, and both the first discharge port 56 and the second discharge port 57 are connected to the discharge frame 1.

[0046] The discharge frame 1 is provided with two discharge slots, and the first discharge port 56 and the second discharge port 57 are respectively connected to the two discharge slots.

[0047] In another embodiment of the present invention: an elastic pressure plate 71 is installed on the inner top wall of the discharge trough, and a slider 73 is vertically slidably installed on the inner wall of the discharge frame 1, with a vertical rod 72 fixedly installed at the bottom end of the slider 73;

[0048] A variable rod 75 is horizontally slidably installed on the side wall of the discharge frame 1, and a sliding rod 74 is installed on the variable rod 75;

[0049] An arc-shaped rod 76 is fixedly installed on the inner wall of the discharge frame 1, a side plate 77 is fixedly installed on the side wall of the arc-shaped rod 76, a rotating block 78 is rotatably installed on the side plate 77, and a rotating rod 91 is rotatably installed on the rotating block 78.

[0050] A screw 85 is threaded onto the arc-shaped rod 76, and a plug rod 92 that is inserted into the screw 85 is slidably mounted on the rotating rod 91.

[0051] There are three screws 85. When the rotating block 78 is rotated, the angle of the rotating rod 91 in the vertical direction can be adjusted. When the rotating rod 91 is kept horizontal, rotating the rotating rod 91 will drive the insert rod 92 to be inserted into the middle screw 85. At this time, the rotation of the rotating rod 91 will drive the screw 85 to move. As the screw 85 moves towards the variable rod 75, it will push the variable rod 75 to slide. At this time, the variable rod 75 will simultaneously drive the two sliding rods 74 to move. At this time, the two sliding rods 74 will simultaneously push the slider 73 to move downward, thereby causing the two elastic pressure plates 71 to bend downward at the same time, thereby controlling the size of the outlet trough and thus controlling the thickness of the polymer film when it comes out.

[0052] The top of the upright 72 is in contact with the elastic pressure plate 71;

[0053] The rotating rod 91 has a protrusion 97 fixedly installed on its surface, which facilitates the rotation of the rotating rod 91.

[0054] Furthermore, both slider 73 and slider 74 have beveled edges at their closest points.

[0055] In another embodiment of the present invention: a connecting block 87 is fixedly installed on the slide bar 74, and the connecting block 87 is T-shaped, and the connecting block 87 slides through the middle of the variable bar 75;

[0056] Among them, reference Figure 5 When the variable lever 75 moves to the left, it will directly push the two sliding levers 74 to move. When the rotating block 78 is rotated, causing the rotating lever 91 to tilt upward, the insert rod 92 is inserted into the upper screw 85. As the rotating lever 91 is rotated, it will drive the upper screw 85 to rotate through the insert rod 92. At this time, the upper screw 85 will push the upper connecting block 87 to move. As the upper connecting block 87 moves, it will push the upper sliding lever 74 to move. At this time, the upper sliding lever 74 will push the upper slider 73 to move downward, thereby controlling the upper elastic pressure plate 71 independently. Similarly, when the rotating lever 91 is rotated downward, it will control the lower elastic pressure plate 71 independently.

[0057] The upper and lower screws 85 are respectively attached to the two connecting blocks 87, for reference. Figure 5 When the screw 85 moves to the left, it will push the connecting block 87 to move. When the screw 85 moves to the right, the elastic pressure plate 71 will rise, thereby pushing the slider 73 and the slide rod 74 to slide and reset.

[0058] In another embodiment of the present invention: a square slot 86 is provided on the screw 85, and the size of the insert 92 is adapted to the size of the slot 86;

[0059] The insertion rod 92 is inserted into the screw 85 through the slot 86. When the rotating rod 91 rotates, it will drive the screw 85 to rotate through the cooperation of the insertion rod 92 and the slot 86. When the screw 85 moves, the insertion rod 92 will move within the slot 86.

[0060] In another embodiment of the present invention: a square plate 93 is fixedly installed at one end of the insertion rod 92 inside the rotating rod 91, a return spring 94 is fixedly installed between the square plate 93 and the rotating rod 91, a pull rod 95 is fixedly installed at the end of the square plate 93 away from the insertion rod 92, and a pull plate 96 is fixedly installed on the pull rod 95;

[0061] When it is necessary to rotate the angle of the rotating rod 91 by the rotating block 78, the insert rod 92 is first pulled outward by the pull plate 96, so that the insert rod 92 is moved out of the slot 86 of the screw 85.

[0062] In another embodiment of the present invention: a follower block 710 is rotatably mounted on the rotating rod 91, and the follower block 710 is slidably mounted on the arc-shaped rod 76, and a stop block 79 is fixedly mounted on the arc-shaped rod 76;

[0063] When the rotating rod 91 is rotated by the rotating block 78, the rotating rod 91 will drive the follower block 710 to move synchronously until the follower block 710 abuts against the upper stop block 79. At this time, the insertion rod 92 on the rotating rod 91 will be aligned with the slot 86 of the upper screw 85. Since both the insertion rod 92 and the slot 86 are square, the insertion rod 92 may not be inserted into the slot 86 at this time. However, as the rotating rod 91 rotates, until the insertion rod 92 and the slot 86 are aligned, the return spring 94 will push the insertion rod 92 into the slot 86.

[0064] The side wall of the arc-shaped rod 76 is provided with a wave plate 82, and a limit rod 83 is fixedly installed on the wave plate 82. The limit rod 83 is inserted into the arc-shaped rod 76, and a connecting spring is fixedly installed between the limit rod 83 and the arc-shaped rod 76. An elastic pad 81 is fixedly installed on the wave plate 82, and an arc-shaped block 84 is fixedly installed at the end of the two wave plates 82 that are close to each other.

[0065] When the follower block 710 approaches the arc-shaped block 84, its sidewall will press the arc-shaped block 84, causing it to move the wave plate 82 outward. At this time, the wave plate 82 will move the elastic pad 81 outward, thus moving away from the screw 85. When the follower block 710 moves away, the connecting spring will pull the limit rod 83 and the wave plate 82 towards the screw 85. At this time, the elastic pad 81 will fit against the screw 85, and because the elastic pad 81 is elastic, part of it will be stuck into the screw groove of the screw 85, thereby limiting the movement of the screw groove as much as possible.

[0066] The side wall of the discharge frame 1 is equipped with a cutting blade 10. When the plastic film comes out of the discharge trough, the excess part on both sides of the plastic film can be cut off by the cutting blade 10. At the same time, the removed plastic film will fall into the collection frame on the side wall of the discharge frame 1 for recycling.

[0067] The molding method of the multilayer polymer film co-extrusion molding equipment according to any one of the above includes the following steps:

[0068] S1. Place each material into the first feeding cylinder 3 and the second feeding cylinder 4 respectively;

[0069] S2. Start the servo motor 61, so that it drives the rotating ring 63 to rotate through the friction disk 62. At this time, the first auger 53 and the second auger 54 will simultaneously convey each material.

[0070] S3. Convey the molten material into the discharge frame 1;

[0071] S4. After the molten material enters the discharge frame 1, it passes through different discharge troughs and its thickness is controlled by each elastic pressure plate 71 before it comes out of the discharge frame 1.

[0072] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multilayer polymer film co-extrusion molding equipment, comprising a discharge frame (1) and an extrusion tube (2) and an inner tube (51) mounted thereon, wherein a first feeding cylinder (3) is fixedly mounted on the extrusion tube (2), a base is fixedly mounted on the side wall of the discharge frame (1), and a second feeding cylinder (4) is fixedly mounted on the base, characterized in that, A servo motor (61) is fixedly installed on the base. A friction disc (62) is fixedly installed at the output end of the servo motor (61). A rotating ring (63) is rotatably installed on the inner wall of the extrusion tube (2). An inner disc (64) is fixedly installed on the inner wall of the rotating ring (63). An inner rod (55) is fixedly installed on the inner disc (64). The first auger (53) is fixedly installed on the rotating ring (63), the second auger (54) is fixedly installed on the inner plate (64), and a heating rod (52) is fixedly installed inside the inner tube (51). The extrusion tube (2) is provided with a first discharge port (56), and the inner tube (51) is provided with a second discharge port (57), and both the first discharge port (56) and the second discharge port (57) are connected to the discharge frame (1); The discharge frame (1) is provided with two discharge slots, and the first discharge port (56) and the second discharge port (57) are respectively connected to the two discharge slots; An elastic pressure plate (71) is installed on the inner top wall of the discharge trough, and a slider (73) is vertically slidably installed on the inner wall of the discharge frame (1). A vertical rod (72) is fixedly installed at the bottom end of the slider (73). A variable rod (75) is horizontally slidably installed on the side wall of the discharge frame (1), and a slide rod (74) is installed on the variable rod (75). An arc-shaped rod (76) is fixedly installed on the inner wall of the discharge frame (1), a side plate (77) is fixedly installed on the side wall of the arc-shaped rod (76), a rotating block (78) is rotatably installed on the side plate (77), and a rotating rod (91) is rotatably installed on the rotating block (78). The arc-shaped rod (76) is threaded with a screw (85), and the rotating rod (91) is slidably mounted with a plug (92) that is inserted into the screw (85). A connecting block (87) is fixedly installed on the slide bar (74), and the connecting block (87) is T-shaped. The connecting block (87) slides through the middle of the variable rod (75). The screw (85) has a square slot (86) and the size of the insert (92) is compatible with the size of the slot (86).

2. The multilayer polymer film co-extrusion molding equipment according to claim 1, characterized in that, The bottom end of the second feeding cylinder (4) is fixedly installed with a feeding pipe, and the other end of the feeding pipe is connected to the inner rod (55); The inner rod (55) has a feed inlet (551).

3. The multilayer polymer film co-extrusion molding equipment according to claim 1, characterized in that, The insert rod (92) is located inside the rotating rod (91) and a square plate (93) is fixedly installed at one end. A return spring (94) is fixedly installed between the square plate (93) and the rotating rod (91). A pull rod (95) is fixedly installed at the end of the square plate (93) away from the insert rod (92), and a pull plate (96) is fixedly installed on the pull rod (95).

4. The multilayer polymer film co-extrusion molding equipment according to claim 1, characterized in that, A follower block (710) is rotatably mounted on the rotating rod (91), and the follower block (710) is slidably mounted on the arc rod (76), and a stop block (79) is fixedly mounted on the arc rod (76).

5. A molding method for a multilayer polymer film co-extrusion molding equipment according to any one of claims 1-4, characterized in that, Includes the following steps: S1. Place each material into the first feeding cylinder (3) and the second feeding cylinder (4) respectively; S2. Start the servo motor (61) so that it drives the rotating ring (63) to rotate through the friction disk (62). At this time, the first auger (53) and the second auger (54) will simultaneously convey each material. S3. Convey the molten material into the discharge frame (1); S4. After the molten material enters the discharge frame (1), it passes through different discharge troughs and the thickness is controlled by each elastic pressure plate (71) before it comes out of the discharge frame (1).

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