Roll forming mechanism of composite reinforcing belt, equipment for vertical roll forming of reinforcing belt and reinforcing belt production line

Abstract

The utility model relates to the field of production equipment of pipeline reinforcing belts, and discloses a rolling forming mechanism of a composite reinforcing belt, equipment for vertical rolling forming of the reinforcing belt and a reinforcing belt production line, the rolling forming mechanism comprises a rolling composite roller set, the rolling composite roller set comprises a rolling gap limited between rollers (671) arranged in pairs, and the rolling gap is arranged between the rollers (671). The utility model relates to a device for forming a reinforcing strip (300) by rolling a molten plastic sheet (200) extruded on both sides of a plurality of rows of reinforcing wires (100) running side by side, downstream of which a blank pressing module (90) for pressing both side edges of the reinforcing strip (300) is arranged. And the two side edges of the reinforcing belt are extruded by the edge pressing module at the downstream of the rolling gap, so that the risk that the reinforcing wire cannot be completely wrapped by molten plastic at the two side edge parts due to insufficient pressure applied by the roller or cooling shrinkage can be reduced, and the product quality and the yield of the manufactured reinforcing belt are effectively ensured.

Description

Technical Field

[0001] This utility model relates to production equipment for pipe reinforcement strips, specifically to a roll forming mechanism for composite reinforcement strips. Furthermore, this utility model also relates to equipment for vertical roll forming of reinforcement strips, including the roll forming mechanism, and a reinforcement strip production line. Background Technology

[0002] To improve the mechanical properties of pipelines, it is typically necessary to use a winding machine to wind reinforcing materials such as steel cord, steel fiber tape, and fiber tape onto a plastic core tube to form a composite pipe. To ensure good reinforcement and composite effect with the plastic core tube, the reinforcing strip used in the production of such composite pipes usually consists of multiple strands of reinforcing filaments (such as steel cord, steel fiber, and steel wire) and a plastic coating, formed into a flat strip, which is then thermally bonded to the outer circumference of the plastic core tube through a spiral winding process.

[0003] The quality of the reinforcing tape has a significant impact on the performance of composite pipes using it. In traditional technology, the reinforcing tape can be manufactured on a production line equipped with a tape-making die. This die may have a vacuum chamber and a composite chamber. After being combed and heat-treated, the reinforcing filaments pass through these chambers sequentially, eventually bonding with molten plastic in the composite chamber to form the reinforcing tape. By having the reinforcing filaments pass through the vacuum chamber, air bubbles in the resulting tape can be effectively avoided, and the bonding density between the reinforcing filaments and the plastic can be strengthened. However, because the reinforcing filaments need to pass through the mandrel holes in the die to enter the vacuum and composite chambers, this die-making process and manufacturing method suffer from problems such as easy wear of the anti-corrosion layer on the surface of the reinforcing filaments and the mandrel holes, making it difficult to guarantee product quality and production efficiency.

[0004] In response, Chinese invention patent application CN118744515A discloses a vertical roll forming equipment and a reinforced belt production line. For example... Figures 1 to 3 As shown, the reinforced tape production line includes a wire feeding and combing system, a vertical roll forming machine 106, a cooling and shaping device for the reinforced tape 300, traction, cutting, and winding equipment, etc. Specifically, the wire feeding system can be configured as a wire feeding frame 101, which can feed multiple strands of reinforcing filament 100, such as steel cord, steel fiber, steel wire, etc. For this purpose, the wire feeding frame 101 can have multiple wire spindles 101a, each wound with reinforcing filament 100, to release multiple strands of reinforcing filament 100 (monofilaments). When the reinforcing filament 100 on the wire spindle 101a is exhausted, a new wire spindle 101a can be replaced, or, according to production needs, wire spindles 101a with different reinforcing filament 100 can be replaced as a whole.

[0005] The unwound reinforcing filaments 100 need to be combed into a predetermined arrangement, allowing them to pass through a filament collector 102, a guide roller 103, a leveling roller 104, and a filament comb 105. The filament collector 102 gathers the multiple strands of reinforcing filaments 100 (monofilaments) unwound from the pay-off frame 101 into a bundle. The filament comb 105 then separates these reinforcing filaments 100 into multiple parallel rows, so that they can be combined with the extruded molten plastic sheet 200 to form a reinforcing belt 300 when subsequently passed through the vertical roll forming equipment 106. To ensure that the reinforcing filaments 100 are arranged at predetermined intervals on the same plane, leveling rollers 104 are provided before and after the filament comb 105 to support the reinforcing filaments 100, and the height position of the reinforcing filaments 100 as they pass through the filament comb 105 is constrained by the guide roller 103 and the first deflecting roller 61a.

[0006] The reinforcing filament 100 is then heat-treated and bonded to the extruded molten plastic sheet 200 in a vertical roll forming apparatus 106 to form a reinforcing strip 300. The reinforcing strip 300 formed by the vertical roll forming apparatus 106 has a high temperature and therefore needs to be further cooled and shaped.

[0007] For this purpose, the reinforcing strip 300 output from the vertical roll forming machine 106 can be switched to run horizontally by the pressure roller device 107, and then thoroughly cooled and shaped by a cooling device such as a water cooling tank 108. Then, the reinforcing strip 300 is pulled backward by the traction machine 110, and multiple air knives or other drying devices 109 can be provided downstream of the water cooling tank 108 to dry the surface moisture of the reinforcing strip 300. Finally, the reinforcing strip 300 can be wound into a roll by the winding machine 112, and the reinforcing strip 300 can be cut in time by the reinforcing strip cutting device 111 according to the winding specifications.

[0008] This reinforced belt production line uses a vertical roll forming machine 106 (i.e., a machine for vertically roll forming reinforced belts) to achieve a roll forming process different from the aforementioned traditional technologies, such as... Figure 3As shown, the vertical roll forming equipment 106 includes a sheet extrusion system 70 and at least one set of roll forming composite rollers (a first set of roll forming composite rollers 67a, a second set of roll forming composite rollers 67b, and a third set of roll forming composite rollers 67c). The sheet extrusion system 70 has an extrusion die 703 and is capable of extruding molten plastic sheets 200 on both sides of multiple rows of reinforcing filaments 100 running side by side. The roll forming composite rollers include rollers 671 arranged in pairs below the extrusion die 703 and spaced apart from each other. Thus, the sheet extrusion system 70 extrudes molten plastic sheets 200 above the roll forming composite rollers. The molten plastic sheet 200 and the reinforcing filaments 100 therebetween are simultaneously fed into the space between the paired rollers 671, so that the rollers 671 can roll the opposite sides of the molten plastic sheet 200, so that the molten plastic sheets 200 extruded from both sides are bonded together, and the multiple rows of reinforcing filaments 100 running side by side are fixed therebetween to form a reinforcing belt 300.

[0009] However, in the aforementioned roll forming process, due to the presence of the reinforcing filament 100, the molten plastic sheet 200 after roll forming by the composite roll set can be well fused together in the part where the reinforcing filament 100 is located. However, the roll forming fusion effect in the two side edges where the reinforcing filament 100 is not satisfactory. Under the action of cooling and shrinkage, the molten plastic cannot even completely wrap the reinforcing filament 100 in the two side edges (e.g., Figure 18 As shown in the figure, the quality of the resulting reinforced belt 300 cannot meet the requirements, resulting in a low yield. Utility Model Content

[0010] The purpose of this invention is to overcome the problem of low yield of reinforcing strips produced by roll forming in the prior art, and to provide a roll forming mechanism for composite reinforcing strips. This roll forming mechanism can effectively improve the roll forming effect of the two sides of the reinforcing strip during the roll forming process, reduce the risk that the molten plastic at the two sides of the reinforcing strip cannot completely wrap the reinforcing filaments, and effectively ensure the product quality and yield of the resulting reinforcing strip.

[0011] To achieve the above objectives, this utility model provides a roll forming mechanism for a composite reinforcing strip, including a roll forming composite roller group. The roll forming composite roller group includes rollers arranged in pairs at intervals, with a roll forming gap defined between the pairs of rollers. This gap allows the molten plastic sheet extruded from multiple rows of reinforcing filaments running side by side to be rolled and bonded to the reinforcing filaments to form a reinforcing strip. Downstream of the roll forming gap, a pressing module is provided for pressing the two side edges of the reinforcing strip.

[0012] Preferably, the pressing module includes a first pressing wheel and a second pressing wheel installed downstream of the roll forming composite roller group and respectively arranged in pairs on both sides of the reinforcing belt in the thickness direction of the reinforcing belt, so as to press the two sides of the reinforcing belt when the reinforcing belt passes through the gap between the first pressing wheel and the second pressing wheel.

[0013] Preferably, the outer peripheries of the first and second pressing wheels taper in the direction toward the centerline of the reinforcing strip to define a tapered cross-sectional gap between the first and second pressing wheels that allows the two side edges of the reinforcing strip to pass through.

[0014] Preferably, the first and second pressing wheels are made of all-steel material, or the outer periphery of the first and second pressing wheels is covered with a silicone coating layer.

[0015] Preferably, the edge pressing module is configured such that the gap between the first edge pressing wheel and the second edge pressing wheel is adjustable and / or the spacing between the two pairs of the first edge pressing wheel and the second edge pressing wheel corresponding to the two sides of the reinforcing belt along the width direction of the reinforcing belt is adjustable.

[0016] Preferably, the pressing module includes pressing rings installed at both axial ends of the roller, the pressing rings being sleeved on the roller and having a maximum radial dimension greater than the radial dimension of the roller.

[0017] Preferably, the pressing module includes scrapers installed downstream of the roll forming composite roller group and arranged in pairs on both sides of the reinforcing belt in the thickness direction, corresponding to the two side edges of the reinforcing belt, to press the two side edges of the reinforcing belt when the reinforcing belt passes through the gap between the scrapers.

[0018] A second aspect of this utility model provides a vertical roll forming apparatus for reinforcing belts, comprising:

[0019] A sheet extrusion system configured to extrude molten plastic sheets from both sides of multiple rows of reinforcing filaments running side-by-side; and,

[0020] In the roll forming mechanism of the composite reinforced belt, the rollers arranged in pairs are horizontally spaced apart from each other, and their respective roller shafts extend in the horizontal direction, while the reinforcing filaments enter the roll forming gap vertically downward.

[0021] Preferably, the equipment for vertical roll forming of reinforcing belt includes multiple sets of the roll forming composite rollers arranged from top to bottom, and the pressing module is located downstream of the roll forming gap of the first set of the roll forming composite rollers and upstream of the second set of the roll forming composite rollers.

[0022] A third aspect of this utility model provides a reinforced belt production line that includes the above-described vertical roll forming equipment for reinforced belts.

[0023] Through the above technical solution, the reinforcing belt after being rolled by the roller pressing composite roller group is squeezed on both sides by the pressing module downstream of the roller pressing gap. This enhances the fusion effect by applying additional force to the two sides, reducing the risk that the molten plastic on both sides of the edges cannot completely wrap the reinforcing filaments due to insufficient pressure applied by the rollers or cooling shrinkage, and effectively ensuring the product quality and yield of the resulting reinforcing belt. Attached Figure Description

[0024] Figure 1 This is a front view of the upstream equipment in a conventional reinforced belt production line, including the yarn feeding, combing system, and vertical roll forming equipment.

[0025] Figure 2 This is a front view of the downstream equipment in a conventional reinforced belt production line, including the cooling and shaping device for the reinforced belt, traction, cutting, and winding equipment, etc. The upstream end on the right side of the figure is connected to... Figure 1 The downstream end on the left side of the middle is connected;

[0026] Figure 3 yes Figure 1 A magnified view of a portion of S1 in the middle;

[0027] Figure 4 This is a front view of a vertical roll forming device for reinforcing belts according to a preferred embodiment of the present invention;

[0028] Figure 5 It is used for Figure 4 A top view of a roll forming mechanism according to a preferred embodiment of the present invention in a vertical roll forming equipment for reinforcing belts.

[0029] Figure 6 yes Figure 5 The AA cross-sectional view of the roll forming mechanism shown in the figure (rotated 90°);

[0030] Figure 7 It can be used Figure 5 A perspective view of a type of edge block in the roll forming mechanism shown;

[0031] Figure 8 It can be used Figure 5 A perspective view of another type of flange block in the roll forming mechanism shown;

[0032] Figure 9 It can be used Figure 5 A perspective view of another type of flange block in the roll forming mechanism shown;

[0033] Figure 10 yes Figure 9 A top view of the edge block shown;

[0034] Figure 11 It is used for Figure 4 A cross-sectional view of a roll forming mechanism according to another preferred embodiment of the present invention in an apparatus for forming a vertical roll forming reinforcing belt.

[0035] Figure 12 yes Figure 11 A top view of the edge pressing module in the roll forming mechanism shown;

[0036] Figure 13 This is a schematic diagram of the first and second pressing wheels of the pressing module during rolling.

[0037] Figure 14 This is a schematic diagram of a first and second pressure roller with another structural form during roll forming;

[0038] Figure 15 This is a perspective view of the scraper of the edge-pressing module in a preferred embodiment;

[0039] Figure 16 This is a diagram showing the mounting structure of the edge-pressing ring of the edge-pressing module on the roller in another preferred embodiment;

[0040] Figure 17 It is a cross-sectional view of an ideal reinforcing strip;

[0041] Figure 18 It is a cross-sectional view showing that the two edges of the reinforcing strip are not well fused together.

[0042] Figure 19 This is a cross-sectional view of the reinforcing belt after it has been processed by the roll forming mechanism of this utility model;

[0043] Figure 20 This is a cross-sectional view after the excess edge material on both sides of the reinforcing strip has been removed after being processed by the roll forming mechanism of this utility model.

[0044] Explanation of reference numerals in the attached figures

[0045] 101-Payout frame; 101a-Wire spindle; 102-Wire collector; 103-Inlet pressure roller; 104-Smoothing roller; 105-Wire separating comb; 106-Vertical roll forming equipment; 107-Pressure roller device; 108-Water cooling tank; 109-Drying device; 110-Traction machine; 111-Reinforcing belt cutting device; 112-Winding machine;

[0046] 60-Frame; 61a, 61b, 61c-Guiding rollers; 62-Oven; 63-Filament splitting roller; 64-Heating roller; 67a, 67b, 67c-Roller-composite roller assembly; 671-Roller; 68-Gap adjustment mechanism; 69-Air cooling device; 70-Sheet extrusion system; 80-Material stacking guide module; 81-Material stacking area; 82-Side guard block; 82a-Guide groove; 82b-Inclined surface; 82c-Arc-shaped surface; 82d-Vertical surface; 90-Edge pressing module; 91-First edge pressing roller; 92-Second edge pressing roller; 93-Silicone coating layer; 94-Conical section gap; 95-Edge pressing ring; 96-Scraper blade;

[0047] 100 - Reinforcing filament; 200 - Molten plastic sheet; 300 - Reinforcing tape. Detailed Implementation

[0048] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0049] In this utility model, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to the up, down, left, and right positions shown with reference to the accompanying drawings; "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself. To facilitate a clear understanding of this utility model, the following will be combined with... Figures 4 to 20 The parts of this utility model that distinguish it from the prior art will be described in detail. However, it should be understood that, for example, the features described in Chinese invention patent application CN118744515A are different. Figure 1 and Figure 2 The other parts of the reinforcing belt production line shown, except for the vertical roll forming equipment 106, are also applicable to the reinforcing belt production line of this utility model. The following description of its composition, arrangement and working process will be omitted.

[0050] like Figure 4As shown, one aspect of this utility model provides a vertical roll forming apparatus for reinforcing belts (i.e., vertical roll forming apparatus 106), including a sheet extrusion system 70 and at least one set of roll forming composite rollers. The sheet extrusion system 70 has a sheet extrusion die and is configured to extrude molten plastic sheets 200 from both sides of multiple rows of reinforcing filaments 100 running side-by-side. The roll forming composite rollers include rollers 671 arranged in pairs below the sheet extrusion die and spaced apart from each other. The sheet extrusion system 70 extrudes the molten plastic sheets 200 above the roll forming composite rollers. The molten plastic sheets 200 and the reinforcing filaments 100 simultaneously enter between the paired rollers 671, allowing the rollers 671 to roll the opposite sides of the molten plastic sheets 200, bonding the extruded molten plastic sheets 200 together and fixing the multiple rows of reinforcing filaments 100 running side-by-side therebetween, forming a reinforcing belt 300. For this purpose, a roll gap is defined between the paired rollers 671 to form a roll gap for receiving the reinforcing filament 100 and the molten plastic sheets 200 extruded on both sides thereon, the roll gap being no less than the design thickness of the reinforcing strip 300 to be produced.

[0051] The roller gap is configured to receive the reinforcing filament 100 traveling from top to bottom. Correspondingly, the extruded molten plastic sheet 200 also travels from top to bottom as it passes through this roller gap. As a result, the molten plastic sheet 200 extruded from both sides of the reinforcing filament 100 can have relatively good consistency under the action of gravity, which helps to ensure the product quality of the produced reinforcing belt 300.

[0052] The vertical roll forming equipment 106 used in this invention employs a hot-pressing composite process when manufacturing the reinforcing belt. This eliminates the need for a belt-making mold and in-mold composite process used in traditional technologies to define the composite cavity. Molten plastic sheets 200 are extruded from both sides of multiple rows of reinforcing filaments 100 running side-by-side via a sheet extrusion system 70. At least one set of roll forming rollers then rolls the molten plastic sheets 200 to bond them integrally with the reinforcing filaments 100, resulting in the roll forming of the reinforcing belt 300. This process is completely different from traditional technologies. Because the reinforcing filaments do not need to pass through the mandrel holes and the traditional in-mold composite process is eliminated, the problems of difficulty in guaranteeing product quality and production efficiency inherent in existing technologies are avoided.

[0053] In particular, traditional manufacturing processes typically involve running the reinforcing filament horizontally to avoid bending, which would hinder production efficiency and product quality control. This invention provides a vertical roll forming machine 106 employing a novel process, configured so that the reinforcing filament 100 runs from top to bottom at the point of bonding with the molten plastic sheet 200. A roll forming composite roller assembly is used on both sides to roll the molten plastic sheet 200, achieving continuous roll forming of the reinforcing strip. This design better adapts to the material properties during bonding, facilitates control of the tension of the reinforcing filament 100, and extrudes a suitable molten plastic sheet 200 for bonding. This significantly reduces the requirements for bonding process conditions and ensures the quality of the resulting reinforcing strip.

[0054] In this configuration, the paired rollers 671 can be horizontally spaced apart, with their respective roller shafts extending horizontally, while the reinforcing filament 100 enters the roller gap vertically downwards. This ensures that the molten plastic sheets 200 on both sides maintain good consistency under gravity and are uniformly rolled as they pass through the roller gap, guaranteeing the quality of the produced reinforcing strip 300. In other embodiments, the downward running direction of the reinforcing filament 100 can also have a certain angle relative to the vertical direction, as long as it does not cause severe deformation of the extruded molten plastic sheet 200 before it is substantially shaped.

[0055] The vertical roll forming equipment 106 of this invention achieves continuous roll forming of reinforcing strips by roll forming molten plastic sheet 200 using a roll forming composite roller group. It can be equipped with one or more roll forming composite roller groups. In the preferred embodiment shown in the figure, the vertical roll forming equipment 106 has three roll forming composite roller groups arranged along the running direction of the reinforcing filament 100: the uppermost first roll forming composite roller group 67a, the second roll forming composite roller group 67b at the middle height position, and the lowermost third roll forming composite roller group 67c. Since the reinforcing filament 100 runs vertically downwards at this position, the above three roll forming composite roller groups are arranged along the same vertical straight line.

[0056] When the reinforcing filament 100 and the molten plastic sheets 200 extruded on both sides pass through the roll gap of the first set of roll forming compound rollers 67a, the molten plastic sheets 200 are rolled together to bond them. At this time, the resulting reinforcing strip has a relatively high temperature and has not yet been formed into the predetermined shape (especially the thickness). This initially formed reinforcing strip continues to pass through the second set of roll forming compound rollers 67b and the third set of roll forming compound rollers 67c, where it can be further refined and shaped. Thus, through multiple roll forming passes (and subsequent cooling), the reinforcing strip can be gradually formed into the predetermined design thickness, resulting in a high-quality final reinforcing strip 300. For this purpose, the roll gap formed by the upper roll forming compound rollers can be set to be equal to or greater than the roll gap formed by the lower roll forming compound rollers. For example, the roll gaps of the first set of roll forming compound rollers 67a, the second set of roll forming compound rollers 67b, and the third set of roll forming compound rollers 67c shown in the figure can be set to decrease sequentially.

[0057] To achieve a good rolling effect, the rollers 671 in the roll forming compound are preferably driven to rotate during the rolling process, so as to roll relative to the surface of the molten plastic sheet 200. In particular, the rollers 671 of the first roll forming compound 67a should be actively rotating. For this purpose, a servo drive mechanism (such as a servo motor) can be provided, which is driven to the rollers 671 to rotate so as to roll the surface of the molten plastic sheet 200. Through this roll forming compound, air bubbles can be effectively prevented from being trapped in the formed reinforcing strip 300 (effectively extruding the gas at the interface between the reinforcing filament 100 and the molten plastic sheet 200), so that the reinforcing filament 100 and the molten plastic sheet 200 are pressed and compacted, ensuring good bonding quality.

[0058] Furthermore, an air-cooling device 69 can be provided between adjacent roll forming composite roll groups. The air-cooling device 69 is arranged on both sides of the reinforcing belt 300 opposite to the belt surface. By blowing cooling air onto the initially roll-formed reinforcing belt 300, its surface is initially cooled and shaped. Then, the next set of roll forming composite roll groups further rolls it, realizing the gradual shaping and cooling of the reinforcing belt 300, and finally achieving the required process thickness.

[0059] Depending on process requirements and product specifications, it may be necessary to adjust the roller gap between the rollers 671 in the roll forming compound roller group. Therefore, the vertical roll forming equipment 106 of this invention can be equipped with a gap adjustment mechanism 68 for adjusting this roller gap. This gap adjustment mechanism 68 can be configured in various forms, as long as it can adjust the spacing between the paired rollers 671. Preferably, the gap adjustment mechanism 68 adopts a screw drive and is driven by a servo motor to ensure adjustment accuracy. Alternatively, it can be configured as a cylinder directly driving the rollers 671, or manually adjusted using a handwheel.

[0060] The gap adjustment mechanism 68 is driven to one or both rollers 671 of the roll forming compound roller group. In one embodiment, the axis of one roller in the roll forming compound roller group is fixed, while the axis of the other roller can be adjusted, thus requiring a drive connection to the gap adjustment mechanism 68 and the ability to be driven closer to or further away from the fixed roller. In this way, the fixed roller can determine the reference plane of the compounding position, and only one side of the roller needs to be adjusted when the roll forming gap needs to be adjusted, making the operation simple and easy to control. In another embodiment, the axes of both rollers in the roll forming compound roller group can be adjusted to synchronously move closer to or further away from the running path of the reinforcing filament 100. This can be achieved using methods such as forward and reverse threaded screw drives, so that when the roll forming gap is adjusted, there is no need to adjust the running path of the reinforcing filament 100 at that position accordingly.

[0061] Typically, a sheet extrusion system 70 for extruding molten plastic sheet 200 may include an extruder and associated extrusion channels and sheet extrusion dies. The extrusion channels are used to convey molten plastic to the sheet extrusion die to extrude the desired molten plastic sheet 200 at a predetermined location. For ease of commissioning, the sheet extrusion system 70 may be configured to allow for three-dimensional adjustment of the position of the sheet extrusion die.

[0062] In addition, the die of the extrusion die can be formed with multiple forming grooves (not shown) corresponding to the reinforcing filaments 100 running side by side, such as using a grooved die or groove bar, which is beneficial for the extruded molten plastic sheet 200 to match the reinforcing filaments 100, thereby further reducing the risk of gas inclusions.

[0063] Reference Figure 5 and Figure 6 As shown, this utility model provides a roll forming mechanism for composite reinforcing belts that can be used in the above-mentioned vertical roll forming equipment 106. The roll forming mechanism includes a roll forming composite roller group, such as the first roll forming composite roller group 67a mentioned above. A material stacking guide module 80 is provided upstream of the roll forming gap of the first roll forming composite roller group 67a. The material stacking guide module 80 is configured to act on both sides of the molten plastic sheet 200, so that the two sides of the molten plastic sheet 200 form a material stacking area 81 at the position where they are about to enter the roll forming gap.

[0064] Therefore, by setting a material stacking guide module 80 upstream of the roll forming gap, a material stacking area 81 can be formed on both sides of the molten plastic sheet 200 when it is about to enter the roll forming gap. This allows more plastic material to enter the roll forming gap than other parts, so that when the roll forming composite roll group rolls, the roller 671 can apply sufficient extrusion to the edge part. This effectively improves the roll forming fusion effect of the two sides of the reinforcing belt, reduces the risk that the molten plastic on both sides of the edge part cannot completely wrap the reinforcing filament due to insufficient pressure or cooling shrinkage, and effectively ensures the product quality and yield of the resulting reinforcing belt.

[0065] In the roll forming mechanism of this invention, the material stacking guide module 80 can be configured in various suitable forms, as long as it can form a material stacking area 81 at the position where the molten plastic sheet 20 is about to enter the roll forming gap on both sides. In a preferred embodiment, the material stacking guide module 80 includes side guard blocks 82 disposed at opposite ends of the upstream of the roll forming gap along an axial direction parallel to the roller 671, with the spacing between the side guard blocks 82 being smaller than the initial width of the extruded molten plastic sheet 200. Thus, the side guard blocks 82 can act on both sides of the molten plastic sheet 200 in the width direction to form a material stacking area 81 at the position where it is about to enter the roll forming gap.

[0066] like Figure 6 As shown, the stacking guide module 80 should be configured such that the stacking area 81 is as close as possible to the roller gap so that the material in the stacking area 81 enters the roller gap and is squeezed. For this purpose, the side guard block 82 can be configured to extend at least partially into the gap between the paired rollers 671 to be close to the roller gap.

[0067] Figures 7 to 10 Three different structural forms of the side guard blocks 82 are illustrated exemplarily. In order to guide material to accumulate in the stacking area 81 and enter the roller gap, the side guard blocks 82 can be configured with decreasing spacing between them along the direction toward the roller gap. Figure 7 The shown edge-stopping block 82 has sequentially connected inclined surfaces 82b, arc-shaped surfaces 82c, and vertical surfaces 82d. By providing the inclined surface 82b, the molten plastic sheet 200 can smoothly enter the gaps between the edge-stopping blocks 82. Furthermore, through the guidance and compression by the arc-shaped surface 82c and the vertical surface 82d, excess plastic material can be accumulated to form a stockpile. Figure 8 The edge-block 82 shown has an arc-shaped surface 82c to gradually enhance the extrusion effect as the molten plastic sheet 200 enters, thus avoiding excessive damage to the edges of the molten plastic sheet 200. Figure 9 and Figure 10In the shown side guard block 82, a guide groove 82a extending through the running direction is formed on the side opposite to the other side guard block, and the width dimension of the guide groove 82a decreases in the direction toward the roller gap, thereby defining the general position of the stacking area 81 by the guide groove 82a and being able to act on the stacked plastic material in the thickness direction.

[0068] Reference Figure 11 and Figure 12 As shown, in a preferred embodiment of the roll forming mechanism of this utility model, a pressing module 90 for pressing the two side edges of the reinforcing strip 300 can be provided downstream of the roll gap. Thus, after being rolled by the roll forming compound roller group, the reinforcing strip 300 has its two side edges pressed by the pressing module 90 downstream of the roll gap. This enhances the fusion effect by applying additional force to these two side edges, reducing the risk that the molten plastic at the two side edges may not completely encapsulate the reinforcing filaments due to insufficient pressure applied by the roller 671 or cooling shrinkage, effectively ensuring the product quality and yield of the resulting reinforcing strip. In particular, when the vertical roll forming equipment 106 has multiple roll forming compound roller groups, the pressing module 90 can be positioned downstream of the roll gap of the first roll forming compound roller group 67a and upstream of the second roll forming compound roller group 67b, thereby pressing the plastic material while it is still in a molten state, ensuring a good composite effect. Even if the molten plastic sheet 200 after being rolled by the first set of composite rollers 67a fails to fuse well at both edges of the reinforcing belt, or even fails to completely enclose the reinforcing filament 100 (such as... Figure 18 As shown), this defect can also be eliminated by the additional extrusion of the edge pressing module 90, so that the molten plastic at both edges is well fused together (as shown). Figure 19 (As shown). Furthermore, by using a cutter to remove the excess material from both sides of the reinforcing strip, the following can be obtained: Figure 20 The reinforcing strip shown has a structure similar to Figure 17 The ideal reinforcing band 300 shown is the same as or similar to the one shown.

[0069] The edge-pressing module 90 can be configured in various suitable forms. For example... Figures 12 to 14As shown, in a preferred embodiment, the edge pressing module 90 may include a first edge pressing wheel 91 and a second edge pressing wheel 92 installed downstream of the roll forming composite roller group and respectively arranged in pairs on both sides of the reinforcing belt 300 in the thickness direction of the reinforcing belt 300, corresponding to the two side edges of the reinforcing belt 300. When the reinforcing belt 300 passes through the gap between the first edge pressing wheel 91 and the second edge pressing wheel 92, the first edge pressing wheel 91 and the second edge pressing wheel 92 roll on the surfaces of the two side edges of the reinforcing belt 300, thereby pressing the two side edges of the reinforcing belt 300. By using the first edge pressing wheel 91 and the second edge pressing wheel 92 downstream of the roll forming composite roller group to apply additional pressing action to the two side edges of the reinforcing belt 300, the fusion effect of the molten plastic sheet 200 at this location can be effectively guaranteed, ensuring that the reinforcing filament 100 is not exposed.

[0070] Furthermore, such as Figure 13 and Figure 14 As shown, along the direction towards the centerline of the reinforcing strip 300, the outer peripheries of the first pressure roller 91 and the second pressure roller 92 taper to define a tapered cross-sectional gap 94 between the first pressure roller 91 and the second pressure roller 92, allowing the two side edges of the reinforcing strip 300 to pass through. Thus, the two side edges of the reinforcing strip 300 can be subjected to a gradually increasing extrusion force, which facilitates the complete fusion of the molten plastic sheet 200 at the edge location, and allows for the subsequent removal of excess width from the edge portion. Wherein, as... Figure 13 As shown, the first pressure roller 91 and the second pressure roller 92 can be made of all-steel material, or, as... Figure 14 As shown, the outer periphery of the first pressure roller 91 and the second pressure roller 92 can be covered with a silicone coating layer 93, so that when the two sides of the reinforcing belt 300 are squeezed, the elasticity of the silicone will cause natural deformation, so that the two molten plastic sheets 200 can be completely fused together. After cooling, the excess edge material is removed to make the edges neat.

[0071] In addition, the edge pressing module 90 can be further configured such that the gap between the first edge pressing wheel 91 and the second edge pressing wheel 92 is adjustable and / or the spacing between the two pairs of first edge pressing wheels 91 and second edge pressing wheels 92 corresponding to the two sides of the reinforcing belt 300 along the width direction of the reinforcing belt 300 is adjustable, so as to adapt to the production needs of reinforcing belts of different specifications (width, thickness).

[0072] In another preferred embodiment, the edge pressing module 90 may include scrapers 96 installed downstream of the roll forming composite roller group and arranged in pairs on both sides of the reinforcing belt 300 in the thickness direction, corresponding to the two side edges of the reinforcing belt 300, such as... Figure 15 As shown, the reinforcing belt 300 is pressed along both sides of its edges as it passes through the gap between the scrapers 96. Thus, the pressing module 90 has a simple structure, avoiding a significant increase in equipment cost.

[0073] In another preferred embodiment, the pressing module 90 may include pressing rings 95 mounted on both axial ends of the rollers 671 of the roll forming compound roller assembly, such as... Figure 16 As shown, the pressure ring 95 is sleeved on the roller 671 (e.g., fixed to the roller 671 by screws) and its maximum radial dimension is greater than that of the roller 671. Similar to the aforementioned first pressure roller 91 and second pressure roller 92, the outer circumferential surface of the pressure ring 95 can also be formed into a conical shape. By integrating the pressure module 90 onto the roller 671 of the roll forming compound roller group, the structure of the roll forming mechanism can be kept compact, eliminating the need to add additional space for arranging the pressure module 90 in the vertical roll forming equipment.

[0074] As mentioned above, before the reinforcing filament 100 reaches the roll forming compound roller group, it needs to be split and heated to facilitate bonding with the molten plastic sheet 200 and ensure product quality. Therefore, at least some components for splitting and heating can be integrated into the vertical roll forming equipment 106. Thus, upstream of the first roll forming compound roller group 67a, along the running direction of the reinforcing filament, a filament heating device for heating the reinforcing filament 100 and / or a splitting unit for splitting multiple strands of reinforcing filament 100 into multiple rows running side-by-side at predetermined intervals can be provided. In the illustrated preferred embodiment, the main filament heating device for heating the reinforcing filament 100 is an oven 62 located at the top of the frame 60. Furthermore, a hot roller 64 can be provided downstream to heat / keep the reinforcing filament 100 using hot water circulation or electric heating rods, etc. This hot roller 64 also serves to turn the reinforcing filament 100 downwards. The filament separating unit includes a filament separating roller 63 (a roller with a limiting groove formed on its outer circumferential surface) or other filament separating components (such as a filament separating comb) disposed between the oven 62 and the hot roller 64.

[0075] The various functional components of the vertical roll forming equipment 106 can be mounted on a frame 60, which may also be equipped with guide rollers to change the running height of the reinforcing filament 100 and the resulting reinforcing belt 300. In the preferred embodiment shown in the figure, a first guide roller 61a, a second guide roller 61b, and a third guide roller 61c are mounted on the frame 60. The reinforcing filament 100 is unwound, bundled, and combed into multiple rows at a first height position, then turns upward around the first guide roller 61a, and is raised to a higher second height after passing the second guide roller 61b at the top of the frame 60, thereby facilitating top-down movement and lamination with the molten plastic sheet 200. The laminated reinforcing belt 300 can run around the third guide roller 61c, changing its running direction after exiting the roll forming assembly, returning to a relatively low horizontal running height, facilitating subsequent cooling, shaping, and traction finishing processes.

[0076] This utility model also provides a reinforced belt production line that includes the above-mentioned vertical roll forming equipment for reinforced belts.

[0077] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A roll forming mechanism for a composite reinforcing strip, comprising a roll forming composite roller group (67a, 67b, 67c), the roll forming composite roller group (67a, 67b, 67c) comprising rollers (671) arranged in pairs spaced apart from each other, the pairs of rollers (671) defining a roll forming gap, so as to enable the molten plastic sheet (200) extruded on both sides of a plurality of parallel-running reinforcing filaments (100) to be integrally bonded to the reinforcing filaments (100) to form a reinforcing strip (300), characterized in that, Downstream of the roller gap is a pressing module (90) for pressing the two side edges of the reinforcing belt (300).

2. The roll forming mechanism for the composite reinforced belt according to claim 1, characterized in that, The pressing module (90) includes a first pressing wheel (91) and a second pressing wheel (92) installed downstream of the roller pressing composite roller group (67a, 67b, 67c) and respectively arranged in pairs on both sides of the reinforcing belt (300) in the thickness direction of the reinforcing belt (300) to press the two sides of the reinforcing belt (300) when the reinforcing belt (300) passes through the gap between the first pressing wheel (91) and the second pressing wheel (92).

3. The roll forming mechanism for the composite reinforced belt according to claim 2, characterized in that, Along the direction toward the centerline of the reinforcing strip (300), the outer peripheries of the first pressing wheel (91) and the second pressing wheel (92) taper to define a tapered cross-sectional gap (94) between the first pressing wheel (91) and the second pressing wheel (92) that allows the two side edges of the reinforcing strip (300) to pass through.

4. The roll forming mechanism for the composite reinforced belt according to claim 2, characterized in that, The first pressing wheel (91) and the second pressing wheel (92) are respectively made of all steel, or the outer periphery of the first pressing wheel (91) and the second pressing wheel (92) is covered with a silicone coating layer (93).

5. The roll forming mechanism for the composite reinforced belt according to claim 2, characterized in that, The pressing module (90) is configured such that the gap between the first pressing wheel (91) and the second pressing wheel (92) is adjustable and / or the spacing between the two pairs of the first pressing wheel (91) and the second pressing wheel (92) corresponding to the two sides of the reinforcing belt (300) along the width direction of the reinforcing belt (300) is adjustable.

6. The roll forming mechanism for the composite reinforced belt according to claim 1, characterized in that, The pressing module (90) includes pressing rings (95) installed at both axial ends of the roller (671). The pressing rings (95) are sleeved on the roller (671) and the maximum radial dimension is greater than the radial dimension of the roller (671).

7. The roll forming mechanism for the composite reinforced belt according to claim 1, characterized in that, The pressing module (90) includes scrapers (96) installed downstream of the roller pressing composite roller group (67a, 67b, 67c) and respectively arranged in pairs on both sides of the reinforcing belt (300) in the thickness direction corresponding to the two side edges of the reinforcing belt (300), so as to press the two side edges of the reinforcing belt (300) when the reinforcing belt (300) passes through the gap between the scrapers (96).

8. A device for vertical roll forming of reinforcing belts, characterized in that, include: A sheet extrusion system (70) configured to extrude molten plastic sheets (200) from both sides of multiple rows of reinforcing filaments (100) running side-by-side; and, In the roll forming mechanism of the composite reinforcing belt according to any one of claims 1 to 7, the rollers (671) arranged in pairs are horizontally spaced apart from each other, and their respective roller shafts extend in the horizontal direction, and the reinforcing filament (100) enters the roll forming gap vertically downward.

9. The equipment for vertical roll forming of reinforcing belts according to claim 8, characterized in that, The vertical roll forming equipment for reinforcing belts includes multiple sets of the roll forming composite roll groups (67a, 67b, 67c) arranged from top to bottom. The edge pressing module (90) is located downstream of the roll forming gap of the first set of the roll forming composite roll groups (67a, 67b, 67c) and upstream of the second set of the roll forming composite roll groups (67a, 67b, 67c).

10. A reinforced belt production line, characterized in that, The equipment includes the vertical roll forming reinforcing belt as described in claim 8 or 9.

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