Floor double-layer composite film inner composite die and production process thereof

Abstract

The invention relates to the technical field of composite floor manufacturing, in particular to a floor double-layer composite film inner composite die and a production process thereof.The floor double-layer composite film inner composite die comprises two side plates, an upper die body, a middle die body and a lower die body are sequentially arranged between the two side plates from top to bottom, the upper die body and the lower die body keep pressing and fixing the middle die body through die body connecting bolts, and the middle die body is connected with the lower die body through die body connecting bolts; a lower lip plate and a straight flow blocking rod are mounted at the edge of the lower die body; the flow divider is mounted on the other side of the middle die body; the die has the beneficial effects that the edges of the side faces, close to each other, of the upper die body and the middle die body are arranged to be step-shaped, the upper lip plate and the oblique flow blocking rod are installed on the edge of the upper die body, the lower lip plate is jacked by the jacking sleeve to move upwards for initial adjustment, and then the pull rod and the jacking rod on the outer side of the upper lip plate are matched to apply pressure to the lower end of the upper lip plate; it is guaranteed that the size of an extrusion die opening is adjusted accurately, the pressing force among the upper die body, the middle die body and the lower die body is not changed, and leakage of media in a runner in the die is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of composite floor manufacturing, specifically to an in-composite mold for a double-layer composite film of a floor and its production process. Background Art

[0002] A double-layer composite film for a floor is a floor structure that combines two film layers with different functions into an integral body through an in-mold composite process. Its mold realizes precise distribution of materials through a double-layer independent runner design, and at the same time takes into account high wear resistance and environmental adaptability, and is suitable for high-demand scenarios such as underfloor heating.

[0003] In the prior art, Chinese Utility Model with publication number CN222512005U discloses a double-layer composite floor extrusion mold. Its production line has a high degree of automation, good production continuity, simple operation, high production capacity, and the double-substrate LVT floor produced is more competitive.

[0004] Currently, in order to produce composite films with different thickness dimensions, it is necessary to adjust the size of the extrusion die orifice of the mold. However, during the adjustment process of traditional molds, the pressing force between the upper, middle, and lower molds changes accordingly, which easily causes the medium in the mold runner to leak, thus affecting the quality of the composite film. For this reason, the present invention proposes an in-composite mold for a double-layer composite film of a floor and its production process to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an in-composite mold for a double-layer composite film of a floor and its production process to solve the problem that the medium in the mold runner is likely to leak when the size of the extrusion die orifice of the traditional mold is adjusted as mentioned in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An in-composite mold for a double-layer composite film of a floor, comprising:

[0007] Side plates, there are two side plates, and an upper mold body, a middle mold body, and a lower mold body are sequentially arranged from top to bottom between the two side plates. Both the upper mold body and the lower mold body keep the middle mold body tightly fixed through mold body connection bolts. An inclined diversion part is formed by inclined setting at one side edge of the middle mold body. The edges of the side surfaces of the upper mold body and the lower mold body close to each other are both arranged in a stepped shape. An upper lip plate and an inclined flow blocking rod are installed at the edge of the upper mold body. The lower end of the upper lip plate is bent and a deformation groove is opened at the bending part. A pressing plate is fixedly installed on the front surface of the upper lip plate. A top rod is threadedly penetrated through the pressing plate from top to bottom, and the lower end of the top rod abuts against the lower part of the upper lip plate. A lower lip plate and a straight flow blocking rod are installed at the edge of the lower mold body. A top moving sleeve is penetrated through the edge of the lower lip plate, and the upper end of the top moving sleeve abuts against the lower lip plate;

[0008] A diverter, the diverter is installed on the other side of the middle die body. There are a first feed inlet and a second feed inlet inside the diverter. A junction box is arranged on the outside of the diverter. An oil circuit joint and a side socket are arranged on the side plate. Mold body aviation sockets are arranged on the outside of both the upper die body and the lower die body.

[0009] Preferably, the surface of the pushing sleeve is provided with external threads, and the pushing sleeve is connected to the lower die body through threaded penetration. An annular baffle is fixed at the lower end of the surface of the pushing sleeve. A pushing nut fixed to the pushing sleeve is arranged below the annular baffle. A locking screw rod is movably penetrated through the inner cavity of the pushing sleeve. A locking screw hole is opened on the lower surface of the lower lip plate, and the upper end of the locking screw rod is inserted into the inner cavity of the locking screw hole through threads. The thread at the upper end of the locking screw rod has a reverse helix direction to the external thread.

[0010] Preferably, a threaded hole is opened on the surface at the bent part of the lower end of the upper lip plate. A pull rod is movably penetrated through the middle of the pressing plate. The lower end of the pull rod is inserted and fixed into the threaded hole on the surface of the upper lip plate. The inclined flow blocking rod is located between the back surface of the upper lip plate and the upper die body. The lower end surface of the inclined flow blocking rod is inclined and parallel to the back surface of the bent part at the lower end of the upper lip plate.

[0011] Preferably, a straight flow blocking rod is arranged between the lower lip plate and the lower die body. One side edge of the lower lip plate extends outwards. The inclined diversion part is located between the upper lip plate and the lower lip plate, and an extrusion die orifice is formed at the edge between the upper lip plate and the lower lip plate. Medium flow channels are opened on the lower surface of the upper die body, the upper surface of the lower die body, and the upper and lower surfaces of the middle die body. The media located on the upper and lower sides of the middle die body flow on the upper and lower sides of the inclined diversion part respectively and are jointly extruded from the extrusion die orifice. A waist-shaped hole is penetrated through the side surface of the lower lip plate. A pressing screw rod is movably penetrated through the inner cavity of the waist-shaped hole, and one end of the pressing screw rod is fixedly connected to the lower die body through threads.

[0012] Preferably, adjusting rods are movably penetrated through the edges of both the upper die body and the lower die body. Connecting holes for threaded insertion of the adjusting rods are opened on both the inclined flow blocking rod and the straight flow blocking rod. Two groups of stacked pressing blocks are fixed on the surfaces of both the upper die body and the lower die body. A T-shaped collar is sleeved on the outside of the adjusting rod through threads, and the flange of the T-shaped collar is rotatably installed between the two pressing blocks. An anti-rotation sliding block fixed to the adjusting rod is arranged on one side of the T-shaped collar, and the anti-rotation sliding block is slidably connected to one pressing block. An adjusting nut is fixed at one end of the T-shaped collar.

[0013] The production process of the floor double-layer composite film uses the above-mentioned inner composite die for the floor double-layer composite film, and specifically includes the following steps:

[0014] Step 1: Feed the two raw materials into the inner cavities of the first feed port and the second feed port respectively. The two raw materials flow in the medium flow channels on the upper and lower sides of the middle die body respectively, and converge and are co-extruded at the extrusion die orifice.

[0015] Step 2: Initially change the size of the extrusion die orifice by controlling the up-and-down sliding of the lower lip plate, and then control the slight deformation of the lower end of the upper lip plate through the pull rod and the ejector rod on the pressing plate to realize the secondary adjustment of the size of the extrusion die orifice, ensuring that the thickness dimension of the composite film extruded from the extrusion die orifice is more accurate.

[0016] Preferably, in Step 1, by respectively turning the adjusting nuts on the upper die body and the lower die body, the inclined flow blocking rod and the straight flow blocking rod are respectively driven to slide in the up-and-down direction. When the inclined surface at the lower end of the inclined flow blocking rod presses against the upper surface of the inclined diversion part, the material on the upper side of the middle die body stops extruding outward. When the upper end surface of the straight flow blocking rod presses against the lower surface of the inclined diversion part, the material on the lower side of the middle die body stops extruding outward.

[0017] Preferably, when turning the adjusting nut, the adjusting nut drives the adjusting rod to move up and down along its own length direction through the thread. The adjusting rod itself is restricted by the anti-rotation slider and cannot rotate. Therefore, when the adjusting rod moves up and down, it drives the inclined flow blocking rod or the straight flow blocking rod to move up and down accordingly.

[0018] Preferably, in Step 2, when adjusting the position of the lower lip plate, first loosen the pressing screw, then turn the locking screw to separate the locking screw from the lower lip plate and extract the locking screw from the ejecting sleeve. Then tighten the ejecting sleeve so that the upper end of the ejecting sleeve pushes the lower lip plate upward to a suitable position, and then tighten the locking screw and the pressing screw in sequence.

[0019] Preferably, in Step 2, first loosen the pull rod to create a gap between the upper bolt head of the pull rod and the upper surface of the pressing plate, then tighten the ejector rod, and generate a downward pressure on the surface of the bent part at the lower end of the upper lip plate by the lower end of the ejector rod, so that the lower end of the upper lip plate undergoes a slight deformation at the deformation groove, and finally tighten the pull rod for locking.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] In the present invention, the edges of the mutually approaching sides of the upper die body and the middle die body are both arranged in a stepped shape. An upper lip plate and an inclined flow blocker are installed at the edge of the upper die body. The lower end of the upper lip plate is bent and a deformation groove is provided at the bending position. A lower lip plate is installed at the edge of the lower die body, and the lower lip plate is driven by a jacking sleeve to slide up and down. An extrusion die orifice is formed between the lower end of the upper lip plate and the lower lip plate. When adjusting the size of the extrusion die orifice, first, the lower lip plate is jacked up by the jacking sleeve for preliminary adjustment. Then, the pull rod and the ejector rod outside the upper lip plate cooperate to apply pressure to the lower end of the upper lip plate, causing the lower end of the upper lip plate to deform slightly for fine adjustment. While ensuring the precise adjustment of the size of the extrusion die orifice, the pressing force between the upper die body, the middle die body, and the lower die body is not changed, thereby avoiding the leakage of the medium in the internal flow channel of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a three-dimensional schematic diagram of the overall structure of the present invention from another perspective;

[0024] Figure 3 is a side view schematic diagram of the structures of the upper die body, the middle die body, and the lower die body of the present invention;

[0025] Figure 4 is an exploded schematic diagram of the structures of the upper die body, the middle die body, and the lower die body of the present invention;

[0026] Figure 5 is a three-dimensional schematic diagram of the structure of the lower die body of the present invention;

[0027] Figure 6 is a three-dimensional schematic diagram of the structure of the lower lip plate of the present invention;

[0028] Figure 7 is a connection schematic diagram of the structures of the upper die body and the inclined flow blocker of the present invention;

[0029] Figure 8 is a three-dimensional schematic diagram of the structure of the inclined flow blocker of the present invention;

[0030] Figure 9 is a three-dimensional schematic diagram of the structure of the straight flow blocker of the present invention;

[0031] Figure 10 is an exploded schematic diagram of the structures of the pressing plate and the upper lip plate of the present invention;

[0032] Figure 11 is a three-dimensional schematic diagram of the structures of the jacking sleeve and the locking screw of the present invention.

[0033] In the figure: 1, side plate; 2, upper die body; 21, upper lip plate; 211, deformation groove; 22, inclined baffle bar; 221, connection hole; 23, pressing plate; 231, pull rod; 232, ejector rod; 3, middle die body; 31, inclined diversion part; 4, lower die body; 41, lower lip plate; 411, waist hole; 412, pressing screw; 413, locking screw hole; 42, straight baffle bar; 5, extrusion die orifice; 6, medium flow channel; 7, ejecting sleeve; 71, locking screw; 72, external thread; 73, annular baffle; 74, ejecting nut; 8, diverter; 81, feed port one; 82, feed port two; 83, junction box; 9, adjusting rod; 91, adjusting nut; 911, T-shaped collar; 92, anti-rotation slide block; 93, pressing block; 10, die body connecting bolt; 11, oil circuit joint; 12, side socket; 13, die body aviation socket. Detailed implementation mode

[0034] In order to clearly and completely describe the purpose, technical solution of the present invention, and make the advantages more clear, the following further details the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some embodiments of the present invention, rather than all embodiments, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0035] Please refer to Figures 1 to 11 , the present invention provides a technical solution:

[0036] Embodiment 1, an internal composite die for double-layer composite film of floor, comprising: a side plate 1 and a diverter 8.

[0037] Specifically, there are two side plates 1, and between the two side plates 1, an upper die body 2, a middle die body 3, and a lower die body 4 are sequentially arranged from top to bottom. The upper die body 2, the middle die body 3, and the lower die body 4 are all fixedly connected to the side plate 1 by bolts to ensure that their positions will not shift. Both the upper die body 2 and the lower die body 4 press and fix the middle die body 3 through die body connection bolts 10. The upper die body 2, the middle die body 3, and the lower die body 4 are closely attached to each other pairwise. With the fixation of the side plate 1, it can prevent the internal medium from leaking. An inclined diversion part 31 is formed by inclined setting at one side edge of the middle die body 3. The lower surface of the inclined diversion part 31 is horizontal, and the upper surface is inclined at 45 degrees, allowing two different media to flow on the upper and lower sides of the middle die body 3 respectively and converge and mix at the edge of the inclined diversion part 31. The edges of the side surfaces of the upper die body 2 and the lower die body 4 close to each other are both set in a stepped shape. An upper lip plate 21 and an inclined flow blocking rod 22 are installed at the edge of the upper die body 2. The upper lip plate 21 is fixedly connected to the upper die body 2 by bolts. The lower end of the upper lip plate 21 is bent, and a deformation groove 211 is opened at the bent part. The bending angle of the lower end of the upper lip plate 21 is 45 degrees, which is the same as the inclination angle of the upper surface of the inclined diversion part 31. The two are parallel to each other and have a gap for the medium to flow. A pressing plate 23 is fixedly installed on the front surface of the upper lip plate 21. The pressing plate 23 is fixed to the upper lip plate 21 by bolts. A top rod 232 is threadedly penetrated through the pressing plate 23 from top to bottom, and the lower end of the top rod 232 abuts against the lower part of the upper lip plate 21. By screwing the top rod 232, the lower end of the top rod 232 squeezes the surface of the bent part at the lower end of the upper lip plate 21, causing a micro-deformation at the bent part at the lower end of the upper lip plate 21, thereby changing the distance between the bent part at the lower end of the upper lip plate 21 and the upper surface of the inclined diversion part 31. A lower lip plate 41 and a straight flow blocking rod 42 are installed at the edge of the lower die body 4. A top sleeve 7 is penetrated through the edge of the lower lip plate 41, and the upper end of the top sleeve 7 abuts against the lower lip plate 41. By screwing the top sleeve 7, the upper end of the top sleeve 7 pushes the lower lip plate 41, and the distance between the lower lip plate 41 and the lower surface of the inclined diversion part 31 can be adjusted;

[0038] Secondly, the diverter 8 is installed on the other side of the middle die body 3. The diverter 8 is divided into upper, middle, and lower three-layer structures. The middle layer structure of the diverter 8 is further subdivided into upper and lower two-layer structures. A feed inlet 81 and a feed inlet 82 are opened inside the diverter 8. The feed inlet 81 and the feed inlet 82 are both pre-opened before the assembly of the diverter 8. The feed inlet 81 and the feed inlet 82 are respectively communicated with the gap between the upper die body 2 and the middle die body 3 and the gap between the middle die body 3 and the lower die body 4, so as to respectively send the two media into the upper and lower sides of the middle die body 3 for flow. A junction box 83 is arranged on the outer side of the diverter 8 for power supply. An oil circuit joint 11 and a side socket 12 are arranged on the side plate 1. Die body aviation sockets 13 are arranged on the outer sides of both the upper die body 2 and the lower die body 4 for heating the upper die body 2 and the lower die body 4 to ensure that the media on both the upper and lower sides of the middle die body 3 are in a molten state.

[0039] In order to prevent the driving sleeve 7 from loosening easily, the present application also has an external thread 72 provided on the surface of the driving sleeve 7, and the driving sleeve 7 is connected to the lower die body 4 through threaded penetration. By screwing the driving sleeve 7, the driving sleeve 7 can be driven to move up and down along its own direction. An annular baffle 73 is fixed at the lower end of the surface of the driving sleeve 7 to limit the maximum upward travel of the driving sleeve 7, and the maximum downward travel of the driving sleeve 7 can be completely separated from the lower die body 4. A driving nut 74 fixed to the driving sleeve 7 is provided on the lower side of the annular baffle 73. The driving nut 74 is mainly provided to facilitate the staff to use a specific wrench to screw it. A locking screw rod 71 is movably penetrated through the inner cavity of the driving sleeve 7. The inner wall of the driving sleeve 7 is not provided with threads, and when the locking screw rod 71 is screwed, it will not affect the driving sleeve 7 and cause the driving sleeve 7 to loosen. A locking screw hole 413 is provided on the lower surface of the lower lip plate 41, and the upper end of the locking screw rod 71 is inserted into the inner cavity of the locking screw hole 413 through threads. After the upper end of the locking screw rod 71 is connected to the locking screw hole 413, the bolt head at the lower end of the locking screw rod 71 abuts against the driving nut 74 from bottom to top, which can prevent the driving sleeve 7 from moving downward due to loosening. In addition, the thread at the upper end of the locking screw rod 71 has a reverse helix direction to that of the external thread 72, and the loosening direction of the driving sleeve 7 is exactly opposite to that of the locking screw rod 71. Therefore, even if the driving sleeve 7 and the locking screw rod 71 may loosen due to external factors such as vibration, the locking screw rod 71 and the driving sleeve 7 will restrict each other, avoiding the position deviation of the lower lip plate 41 caused by the loosening of the driving sleeve 7.

[0040] In order to keep the lower end of the upper lip plate 21 stable after deformation, the present application also has a threaded hole provided on the surface at the bent part at the lower end of the upper lip plate 21. A pull rod 231 is movably penetrated through the middle of the pressing plate 23. The lower end of the pull rod 231 is inserted and fixed into the threaded hole on the surface of the upper lip plate 21. Before the ejector rod 232 ejects the upper lip plate 21, first loosen the pull rod 231 to release the tension positioning of the lower end of the upper lip plate 21 by the pull rod 231. Then, after tightening the ejector rod 232 to tightly press the lower end of the upper lip plate 21, tighten the pull rod 231 to tighten the lower end of the upper lip plate 21. The cooperation between the pull rod 231 and the ejector rod 232 can play a stable positioning effect on the deformation of the lower end of the upper lip plate 21, ensuring that the gap between the lower end of the upper lip plate 21 and the upper surface of the inclined diversion part 31 can be kept stable and accurate after being adjusted to be smaller. Similarly, when it is necessary to increase the gap between the lower end of the upper lip plate 21 and the upper surface of the inclined diversion part 31, first loosen the ejector rod 232 and then tighten the pull rod 231. The pull rod 231 pulls the lower end of the upper lip plate 21 to perform a micro-deformation, and then tighten the ejector rod 232 to tightly press the lower end of the upper lip plate 21. In addition, the inclined baffle rod 22 is located between the back surface of the upper lip plate 21 and the upper die body 2. The lower end surface of the inclined baffle rod 22 is inclined and parallel to the back surface of the bent part at the lower end of the upper lip plate 21, as Figure 3As can be seen, the medium above the inclined diversion part 31 can flow along the upper surface of the inclined diversion part 31. By moving the inclined baffle rod 22 up and down, the distance between the inclined baffle rod 22 and the inclined diversion part 31 can be changed. When the inclined baffle rod 22 is pressed against and fits the inclined diversion part 31, the inclined baffle rod 22 can prevent the medium above the middle die body 3 from flowing out.

[0041] In order to accurately adjust the thickness dimension of the composite film extrusion molding, the present application also has a straight baffle rod 42 arranged between the lower lip plate 41 and the lower die body 4. One side edge of the lower lip plate 41 extends outwards. The inclined diversion part 31 is located between the upper lip plate 21 and the lower lip plate 41, and an extrusion die orifice 5 is formed at the edge between the upper lip plate 21 and the lower lip plate 41. As Figure 3 shown, the media on the upper and lower sides of the inclined diversion part 31 flow along the upper and lower sides of the inclined diversion part 31 respectively, converge and are extruded at the extrusion die orifice 5. By controlling the up and down movement of the lower lip plate 41, the size of the extrusion die orifice 5 can be initially adjusted. By controlling the micro-deformation of the lower end of the upper lip plate 21, the size of the extrusion die orifice 5 can be accurately adjusted, so as to ensure that the thickness dimension of the composite film extruded from the extrusion die orifice 5 is more accurate. Medium flow channels 6 are opened on the lower surface of the upper die body 2, the upper surface of the lower die body 4, and the upper and lower surfaces of the middle die body 3. The media located on the upper and lower sides of the middle die body 3 flow on the upper and lower sides of the inclined diversion part 31 respectively and are jointly extruded from the extrusion die orifice 5. The medium flow channel 6 on the upper die body 2 corresponds to the medium flow channel 6 on the upper surface of the middle die body 3, and the medium flow channel 6 on the lower die body 4 corresponds to the medium flow channel 6 on the lower surface of the middle die body 3. Two different media flow on the upper and lower sides of the inclined diversion part 31 respectively. A waist-shaped hole 411 is formed through the side surface of the lower lip plate 41. The length direction of the waist-shaped hole 411 is vertical. A pressing screw 412 is movably arranged through the inner cavity of the waist-shaped hole 411, and one end of the pressing screw 412 is fixedly connected to the lower die body 4 by threads. When it is necessary to adjust the up and down position of the lower lip plate 41, first, the pressing screw 412 needs to be loosened, and the lower lip plate 41 is pushed by the top moving sleeve 7, and then the pressing screw 412 is tightened to prevent the lower lip plate 41 from easily shifting in position.

[0042] In order to adjust the vertical positions of the inclined flow restrictor rod 22 and the straight flow restrictor rod 42, the present application further has adjusting rods 9 movably penetrating through the edges of the upper die body 2 and the lower die body 4. Connecting holes 221 for threaded insertion of the adjusting rods 9 are provided on both the inclined flow restrictor rod 22 and the straight flow restrictor rod 42. Two sets of stacked pressing blocks 93 are fixed on the surfaces of the upper die body 2 and the lower die body 4. Bolts are provided at the four corners of the two pressing blocks 93 for fixing and installing themselves. A T-shaped collar 911 is sleeved on the outer side of the adjusting rod 9 through a thread, and the flange of the T-shaped collar 911 is rotatably installed between the two pressing blocks 93. The T-shaped collar 911 can only rotate around its own axis without position offset. An anti-rotation slider 92 fixed to the adjusting rod 9 is provided on one side of the T-shaped collar 911, and the anti-rotation slider 92 is slidably connected to one pressing block 93. A slideway adapted to the anti-rotation slider 92 is provided in the middle of one pressing block 93. The anti-rotation slider 92 can only slide up and down within the pressing block 93 and cannot rotate. Therefore, the adjusting rod 9 itself does not rotate. An adjusting nut 91 is fixed to one end of the T-shaped collar 911. The staff drives the adjusting nut 91 to rotate through a wrench, and then drives the adjusting rod 9 to move up and down through the thread, so as to adjust the vertical positions of the inclined flow restrictor rod 22 and the straight flow restrictor rod 42.

[0043] The present invention also discloses a production process for a double-layer composite film for floors, using the inner composite die for the double-layer composite film for floors as described above, which specifically includes the following steps:

[0044] Step 1: Feed the two raw materials into the inner cavities of the first feed port 81 and the second feed port 82 respectively. The two raw materials flow in the medium flow channels 6 on the upper and lower sides of the middle die body 3 respectively, and converge and are co-extruded at the extrusion die orifice 5.

[0045] Step 2: Initially change the size of the extrusion die orifice 5 by controlling the up and down sliding of the lower lip plate 41, and then control the slight deformation of the lower end of the upper lip plate 21 through the pull rod 231 and the push rod 232 on the pressing plate 23 to realize the secondary adjustment of the size of the extrusion die orifice 5, ensuring that the thickness dimension of the composite film extruded from the extrusion die orifice 5 is more accurate.

[0046] In order to control the stop of the material flow according to actual requirements, in Step 1, by respectively turning the adjusting nuts 91 on the upper die body 2 and the lower die body 4 to respectively drive the inclined flow restrictor rod 22 and the straight flow restrictor rod 42 to slide in the up and down directions. When the inclined surface at the lower end of the inclined flow restrictor rod 22 presses against the upper surface of the inclined diversion part 31, the material on the upper side of the middle die body 3 stops extruding outwards. When the upper end surface of the straight flow restrictor rod 42 presses against the lower surface of the inclined diversion part 31, the material on the lower side of the middle die body 3 stops extruding outwards.

[0047] For the convenience of the staff to control the up-and-down movement of the inclined flow blocking rod 22 and the straight flow blocking rod 42, when turning the adjusting nut 91, the adjusting nut 91 drives the adjusting rod 9 to move up and down along its own length direction through the thread. The adjusting rod 9 itself is restricted by the anti-rotation slider 92 and cannot rotate. Therefore, when the adjusting rod 9 moves up and down, it drives the inclined flow blocking rod 22 or the straight flow blocking rod 42 to move up and down accordingly.

[0048] In order to lock and position the lower lip plate 41, in step two, when adjusting the position of the lower lip plate 41, first loosen the pressing screw 412, then turn the locking screw 71 to separate the locking screw 71 from the lower lip plate 41 and extract the locking screw 71 from the top moving sleeve 7. Then tighten the top moving sleeve 7 so that the upper end of the top moving sleeve 7 pushes the lower lip plate 41 to move up to a suitable position, and then tighten the locking screw 71 and the pressing screw 412 in sequence again.

[0049] In order to ensure that the lower end of the upper lip plate 21 can maintain its own position stability after deformation, in step two, first loosen the pull rod 231 to create a gap between the upper bolt head of the pull rod 231 and the upper surface of the pressing plate 23. Then tighten the ejector rod 232, and the lower end of the ejector rod 232 generates a downward pressure on the surface of the bent part at the lower end of the upper lip plate 21, so that the lower end of the upper lip plate 21 undergoes a slight deformation at the deformation groove 211. Finally, tighten the pull rod 231 for locking.

[0050] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Double-layer composite die for inner composite of floor double-layer composite film, characterized in that: Including: Side plates (1), two side plates (1) are provided, and an upper die body (2), a middle die body (3) and a lower die body (4) are sequentially arranged from top to bottom between the two side plates (1). Both the upper die body (2) and the lower die body (4) keep the middle die body (3) pressed and fixed through die body connection bolts (10). An inclined diversion part (31) is formed by inclined setting at one side edge of the middle die body (3). The edges of the side surfaces of the upper die body (2) and the lower die body (4) close to each other are both arranged in a stepped shape. An upper lip plate (21) and an inclined flow blocking rod (22) are installed at the edge of the upper die body (2). The lower end of the upper lip plate (21) is bent, and a deformation groove (211) is opened at the bent part. A pressing plate (23) is fixedly installed on the front surface of the upper lip plate (21). A ejector rod (232) is threadedly penetrated through the pressing plate (23) from top to bottom, and the lower end of the ejector rod (232) abuts against the lower part of the upper lip plate (21). A lower lip plate (41) and a straight flow blocking rod (42) are installed at the edge of the lower die body (4). A jacking sleeve (7) is penetrated through the edge of the lower lip plate (41), and the upper end of the jacking sleeve (7) abuts against the lower lip plate (41). A diverter (8), the diverter (8) is installed on the other side of the middle die body (3). A first feed port (81) and a second feed port (82) are opened inside the diverter (8). A junction box (83) is arranged on the outside of the diverter (8). An oil circuit joint (11) and a side socket (12) are arranged on the side plate (1). Die body aviation sockets (13) are arranged on the outside of both the upper die body (2) and the lower die body (4).

2. The inner composite mold of the double-layer composite film for the floor according to claim 1, characterized in that: External threads (72) are formed on the surface of the jacking sleeve (7), and the jacking sleeve (7) is threadedly penetrated and connected with the lower die body (4). An annular baffle (73) is fixed at the lower end of the surface of the jacking sleeve (7). A jacking nut (74) fixed to the jacking sleeve (7) is arranged on the lower side of the annular baffle (73). A locking screw rod (71) is movably penetrated through the inner cavity of the jacking sleeve (7). A locking screw hole (413) is opened on the lower surface of the lower lip plate (41), and the upper end of the locking screw rod (71) is inserted into the inner cavity of the locking screw hole (413) through threads. The thread of the upper end of the locking screw rod (71) has a reverse helix direction to the external threads (72).

3. The inner composite die of the double-layer composite film for the floor according to claim 2, characterized in that: Threaded holes are opened on the surface of the bent part at the lower end of the upper lip plate (21). A pull rod (231) is movably penetrated through the middle of the pressing plate (23). The lower end of the pull rod (231) is inserted and fixed with the threaded hole on the surface of the upper lip plate (21). The inclined flow blocking rod (22) is located between the back surface of the upper lip plate (21) and the upper die body (2). The lower end surface of the inclined flow blocking rod (22) is inclined and parallel to the back surface of the bent part at the lower end of the upper lip plate (21).

4. The inner composite die of the double-layer composite film for the floor according to claim 3, wherein: A straight choke bar (42) is arranged between the lower lip plate (41) and the lower die body (4). One side edge of the lower lip plate (41) extends outwards. The inclined diversion part (31) is located between the upper lip plate (21) and the lower lip plate (41), and an extrusion die orifice (5) is formed at the edge between the upper lip plate (21) and the lower lip plate (41). Medium flow channels (6) are formed on the lower surface of the upper die body (2), the upper surface of the lower die body (4), and the upper and lower surfaces of the middle die body (3). The media located on the upper and lower sides of the middle die body (3) flow on the upper and lower sides of the inclined diversion part (31) respectively and are jointly extruded from the extrusion die orifice (5). A waist-shaped hole (411) is formed through the side surface of the lower lip plate (41), and a pressing screw (412) is movably arranged through the inner cavity of the waist-shaped hole (411), and one end of the pressing screw (412) is fixedly connected to the lower die body (4) by threads.

5. The inner composite die of the double-layer composite film for the floor according to claim 4, characterized in that: Adjusting rods (9) are movably arranged through the edges of the upper die body (2) and the lower die body (4). Connecting holes (221) for threaded insertion of the adjusting rods (9) are formed on both the inclined choke bar (22) and the straight choke bar (42). Two sets of stacked pressing blocks (93) are fixed on the surfaces of the upper die body (2) and the lower die body (4). A T-shaped collar (911) is sleeved on the outer side of the adjusting rod (9) by threads, and the flange of the T-shaped collar (911) is rotatably installed between the two pressing blocks (93). An anti-rotation sliding block (92) fixed to the adjusting rod (9) is arranged on one side of the T-shaped collar (911), and the anti-rotation sliding block (92) is slidably connected to one pressing block (93). An adjusting nut (91) is fixed to one end of the T-shaped collar (911).

6. The production process of the double-layer composite floor film is characterized in that: Using the in-line composite die for the double-layer composite film of the floor described in claim 5, specifically includes the following steps: Step 1: Feed the two raw materials into the inner cavities of the first feed port (81) and the second feed port (82) respectively. The two raw materials flow in the medium flow channels (6) on the upper and lower sides of the middle die body (3) respectively, and converge and are jointly extruded at the extrusion die orifice (5). Step 2: Initially change the size of the extrusion die orifice (5) by controlling the up and down sliding of the lower lip plate (41), and then control the slight deformation of the lower end of the upper lip plate (21) through the pull rod (231) and the ejector rod (232) on the pressing plate (23) to realize the secondary adjustment of the size of the extrusion die orifice (5), ensuring that the thickness size of the composite film extruded from the extrusion die orifice (5) is more accurate.

7. The production process of the double-layer composite film for the floor according to claim 6, characterized in that: In the said Step 1, by respectively screwing the adjusting nuts (91) on the upper die body (2) and the lower die body (4) to respectively drive the inclined choke bar (22) and the straight choke bar (42) to slide in the up and down directions. When the inclined surface at the lower end of the inclined choke bar (22) presses against the upper surface of the inclined diversion part (31), the material on the upper side of the middle die body (3) stops extruding outwards. When the upper end surface of the straight choke bar (42) presses against the lower surface of the inclined diversion part (31), the material on the lower side of the middle die body (3) stops extruding outwards.

8. The production process of the double-layer composite film for floor according to claim 7, characterized in that: When turning the adjusting nut (91), the adjusting nut (91) drives the adjusting rod (9) to move up and down along its own length direction through the thread. The adjusting rod (9) itself is restricted by the anti-rotation slider (92) and cannot rotate. Therefore, when the adjusting rod (9) moves up and down, it drives the inclined flow blocking rod (22) or the straight flow blocking rod (42) to move up and down accordingly.

9. The production process of the double-layer composite film for floor according to claim 6, characterized in that: In the second step, when adjusting the position of the lower lip plate (41), first loosen the pressing screw rod (412), then turn the locking screw rod (71) to separate the locking screw rod (71) from the lower lip plate (41) and pull the locking screw rod (71) out of the jacking sleeve (7). Then tighten the jacking sleeve (7) so that the upper end of the jacking sleeve (7) jacks up the lower lip plate (41) to a proper position, and then tighten the locking screw rod (71) and the pressing screw rod (412) in sequence again.

10. The production process of the double-layer composite film for floor according to claim 6, characterized in that: In the second step, first loosen the pull rod (231) to create a gap between the upper bolt head of the pull rod (231) and the upper surface of the pressing plate (23). Then tighten the ejector rod (232), and the lower end of the ejector rod (232) generates a downward pressure on the surface of the bent part at the lower end of the upper lip plate (21), causing a slight deformation of the lower end of the upper lip plate (21) at the deformation groove (211). Finally, tighten the pull rod (231) for locking.

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