A plastic hook forming device based on horizontal setting

Abstract

This utility model discloses a horizontally positioned plastic hook forming device, comprising a frame and a forming roller assembly mounted on the frame. The forming roller assembly includes an extrusion roller, a mold roller, a shaping roller, and a discharge roller. The extrusion roller and the discharge roller are slidably connected to the frame. The frame is equipped with a spacing adjustment drive mechanism on both the front and rear sides of the extrusion roller. The spacing adjustment drive mechanism on the front side of the extrusion roller drives the extrusion roller to slide on the frame to adjust the spacing between the extrusion roller and the mold roller. The spacing adjustment drive mechanism on the rear side of the discharge roller drives the discharge roller to slide on the frame to adjust the spacing between the discharge roller and the shaping roller. Each of the extrusion roller, mold roller, shaping roller, and discharge roller is equipped with an independently driven servo motor. At least one mold roller in the forming roller assembly is equipped with a cooling structure that allows coolant circulation without leakage. This plastic hook forming device enables roller spacing adjustment, and each roller is equipped with a servo motor for independent control, while the cooling structure is leak-proof.

Description

Technical Field

[0001] This utility model relates to the field of plastic hook production technology, and in particular to a plastic hook forming device based on a horizontal setting. Background Technology

[0002] Plastic hooks, commonly known in the industry as Velcro, are currently manufactured using a mainstream method that involves a horizontally ejecting mold and a series of forming rollers arranged vertically. The mold's ejector port is flat and horizontally aligned with the space between the two uppermost adjacent rollers. During manufacturing, the plasticized plastic is horizontally extruded from the ejector port and enters the space between the two uppermost adjacent rollers for initial forming. The biggest drawback of this method is that the horizontal ejection and the vertically arranged forming rollers cause the plastic to accumulate on the upper surface of the second roller's feed side after being extruded from the ejector port, resulting in what is commonly known in the industry as material piling.

[0003] Based on this, the invention patent application with publication number CN118288515A discloses a hook and loop fastener production equipment. This hook and loop fastener production equipment adopts a vertically downward-oriented discharge port. The plasticized plastic is extruded from the vertically downward-oriented discharge port. The rollers are arranged horizontally side by side in sequence, thereby solving the above-mentioned problem of material accumulation.

[0004] However, in actual production, each roller is directly or indirectly driven by the same motor, and each roller cannot be independently controlled in terms of parameters such as speed and time.

[0005] In addition, each roller in the Velcro production equipment has a liquid cooling chamber, and the outer circumferential wall of the mold roller has several forming micro-holes. In this way, when liquid cooling is performed, the coolant in the liquid cooling chamber of the mold roller will flow out from the forming micro-holes.

[0006] Finally, in this hook and loop fastener production equipment, each roller is fixedly mounted on the frame at both ends, and the distance between them is not adjustable. However, in the production process of plastic hooks, the gap between the rollers is slightly different for different plastics. In order to improve the production quality, it is best to be able to adjust the distance between the rollers. Summary of the Invention

[0007] To at least partially solve the above-mentioned technical problems, this utility model proposes a new structure for a plastic hook forming device based on a horizontal arrangement.

[0008] This utility model proposes a plastic hook forming device based on horizontal arrangement, which includes a frame and a forming roller group mounted on the frame. The forming roller group includes an extrusion roller, a mold roller, a shaping roller and a discharge roller arranged in front and back order along the product forward direction.

[0009] The extrusion roller and the discharge roller are slidably connected to the frame through a sliding structure that is matched with the frame. The frame is provided with a spacing adjustment drive mechanism on the front side of the extrusion roller and the rear side of the discharge roller. The spacing adjustment drive mechanism on the front side of the extrusion roller drives the extrusion roller to slide on the frame to adjust the spacing between the extrusion roller and the mold roller. The spacing adjustment drive mechanism on the rear side of the discharge roller drives the discharge roller to slide on the frame to adjust the spacing between the discharge roller and the shaping roller.

[0010] The extrusion roller, die roller, shaping roller, and discharge roller are all equipped with independently driven servo motors;

[0011] At least one of the forming rollers is equipped with a cooling structure that allows coolant to circulate without leakage.

[0012] In one feasible implementation, the mold roller and the shaping roller are fixedly installed on the frame.

[0013] Preferably, the mold roller and the shaping roller are assembled on the same side of the same mounting plate and then fixed to the frame.

[0014] In one possible implementation, the sliding structure includes a mating guide rail and a slider.

[0015] Preferably, the guide rail is mounted on the top of the frame, the slider is located at the bottom of the adjusting mounting plate, and the adjusting mounting plate is mounted on the end of the corresponding roller.

[0016] In one feasible embodiment, the spacing adjustment drive mechanism includes a drive motor, a worm gear reducer driven by the output end of the drive motor, an active worm gear screw jack mounted on one side of the top of the frame and driven by the output end of the worm gear reducer, a secondary worm gear screw jack mounted on the other side of the top of the frame and driven by the active worm gear screw jack via a drive shaft, an active pressing plate connected to the output end of the active worm gear screw jack that outputs linear motion, and a secondary pressing plate connected to the output end of the secondary worm gear screw jack that outputs linear motion. The active pressing plate and the secondary pressing plate, driven by the drive motor, push the adjustment mounting plate to achieve spacing adjustment.

[0017] In one feasible embodiment, the mold roller includes an inner roller body, a sealing roller sleeve fitted on the inner roller body, and a mold roller sleeve fitted on the sealing roller sleeve. The inner roller body is provided with an inlet channel and an outlet channel. A cooling channel is formed between the inner roller body and the sealing roller sleeve along the length direction of the mold roller. The cooling channel is connected to the inlet channel and the outlet channel respectively. Coolant flows in the inlet channel, the cooling channel, and the outlet channel.

[0018] Preferably, one end of the inner roller body has a stepped blind hole extending from the end face to near the other end. A composite liquid pipe is sealed and connected to the opening end of the stepped blind hole at one end of the inner roller body. The composite liquid pipe has an inlet end and an outlet end. An inlet pipe is inserted into the stepped blind hole, and the outlet of the inlet pipe is located in a small-diameter hole near the inner part of the stepped blind hole. The inlet end of the inlet pipe is sealed and inserted into the composite liquid pipe and communicates with the inlet end of the composite liquid pipe. A spiral groove extending along its length is provided on the outer wall of the roller body. The spiral opening extending in the degree direction is sealed by the sealing roller sleeve. The spiral groove forms the cooling channel. The inner roller body has a liquid inlet connection hole at the end of the small diameter hole to connect the small diameter hole and the spiral groove at that position. The inner roller body has a liquid outlet connection hole at the root of the large diameter hole near the stepped blind hole to connect the large diameter hole and the spiral groove at that position. The large diameter hole is connected to the liquid outlet end of the composite liquid pipe. The liquid inlet end, liquid inlet pipe, small diameter hole, and liquid inlet connection hole form a liquid inlet channel. The liquid outlet connection hole, large diameter hole, and liquid outlet end form a liquid outlet channel.

[0019] The plastic hook forming device proposed in this utility model is based on a horizontal setting. After the extrusion roller, mold roller, shaping roller and discharge roller are arranged in front and behind in the product forward direction, the mold is set vertically so that the discharge port of the mold is vertically downward and directly facing the gap between the extrusion roller and the mold roller. At this time, the plasticized plastic flows directly from the vertical discharge port into the space between the two rollers without the phenomenon of material accumulation.

[0020] The plastic hook forming device of this utility model has an independent servo motor to drive each roller, and the speed and time of each roller can be controlled individually. Moreover, the servo motor can achieve precise control, which helps to improve product quality.

[0021] The plastic hook forming device of this utility model is provided with a spacing adjustment drive mechanism on the front and rear sides, which can conveniently adjust the distance between the extrusion roller and the mold roller, as well as the distance between the shaping roller and the discharge roller, to meet the spacing adjustment requirements in the plastic hook production process.

[0022] The plastic hook forming device of this utility model has at least a cooling structure on the mold roller that allows coolant to circulate and prevent leakage. During cooling, the coolant can cool the product to the required temperature without leakage. Attached Figure Description

[0023] Figure 1 This is a top view of the structure disclosed herein;

[0024] Figure 2 This is a partial three-dimensional enlarged structural schematic diagram of the present disclosure;

[0025] Figure 3 This is a cross-sectional schematic diagram of the mold roller disclosed herein;

[0026] Figure 4 for Figure 3 Enlarged diagram of point A in the diagram. Detailed Implementation

[0027] The technical solutions in specific embodiments of the present invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the teachings of the following embodiments are within the scope of protection of the present invention.

[0028] Example 1

[0029] like Figure 1-4 As shown, this embodiment provides a horizontally arranged plastic hook forming device, including a frame 1 and a forming roller assembly mounted on the frame 1. The forming roller assembly includes an extrusion roller 2, a mold roller 3, a shaping roller 4, and a discharge roller 5 arranged sequentially along the product's forward direction. In this embodiment, the extrusion roller 2, mold roller 3, shaping roller 4, and discharge roller 5 are arranged side-by-side in a basically horizontal state. The extrusion roller 2 is in front, and the discharge roller 5 is behind. Thus, during production, the mold (not shown) is vertically positioned so that the mold's discharge port is vertically facing the gap between the extrusion roller 2 and the mold roller 3. At this time, the plasticized plastic can flow directly from the vertically downward discharge port into the space between the two rollers, preventing material accumulation.

[0030] Both the extrusion roller 2 and the discharge roller 5 are slidably connected to the frame 1 via a sliding structure that matches the frame 1. The frame 1 has a spacing adjustment drive mechanism on the front side of the extrusion roller 2 and the rear side of the discharge roller 5. The spacing adjustment drive mechanism on the front side of the extrusion roller 2 drives the extrusion roller 2 to slide on the frame 1 to adjust the spacing between the extrusion roller 2 and the mold roller 3. The spacing adjustment drive mechanism on the rear side of the discharge roller 5 drives the discharge roller 5 to slide on the frame 1 to adjust the spacing between the discharge roller 5 and the shaping roller 4. In the plastic extrusion molding process, the extrusion roller 2 needs to extrude the mold roller 3 to initially shape the plasticized plastic on the mold roller 3. In this embodiment, the spacing adjustment drive mechanism can effectively adjust the spacing between the two rollers, thereby achieving the initial extrusion molding of the plastic.

[0031] It should be noted that in the plastic hook production process, the mold roller 3 and the shaping roller 4 mainly shape the hook hairs of the initially formed plastic hook. At this time, the distance between the mold roller 3 and the shaping roller 4 needs to remain constant. Therefore, in this embodiment, the mold roller 3 and the shaping roller 4 are fixedly installed on the frame 1. To form a collection and avoid distributing the two rollers on the frame 1, in this embodiment, the ends of the mold roller 3 and the shaping roller 4 on the same side are collected on the same mounting plate 7 and then fixed to the frame 1. Furthermore, in this embodiment, the frame 1 has two opposing wall plates 101, and a mounting plate 7 is installed on the top of each wall plate 101, thus forming two mounting plates 7. The two ends of the rollers are fitted onto the corresponding mounting plates 7.

[0032] The extrusion roller 2, mold roller 3, shaping roller 4, and discharge roller 5 are all equipped with independently driven servo motors 6. Compared with the prior art, each roller can achieve individual start-up and speed control through its own servo motor 6. The rollers are not interdependent and can be adjusted independently. For the plastic hook production process, the servo motor 6 has the characteristic of precise control, which can achieve the required high-precision settings and meet the requirements for producing high-quality products.

[0033] At least one mold roller 3 in the forming roller group is equipped with a cooling structure that allows coolant to circulate without leakage. The mold roller 3 is used to initially form the required hooks and fur, and the temperature requirements are very strict, requiring a stable temperature state. Therefore, when the temperature is too high, it must be cooled down. Hence, the forming roller group must have a cooling structure on the mold roller 3. Compared with the prior art, the cooling structure in this disclosure satisfies the requirement for coolant circulation while preventing leakage, thus ensuring the reliable implementation of the cooling process.

[0034] It should be noted that, in this embodiment, in order to optimize the molding and shaping effect, each roller is equipped with a cooling structure. Through the independently set cooling structure, each roller can be effectively cooled, which can greatly improve the quality of the plastic hook.

[0035] In this embodiment, the sliding structure includes a mating guide rail 8 and a slider 9, wherein the guide rail 8 and the slider 9 are T-shaped and fitted together. Specifically, the guide rail 8 is mounted on the wall plate 101 at the top of the frame 1, and the slider 9 is located at the bottom of the adjusting mounting plate 10, which is mounted on the end of the corresponding roller. Thus, when an external thrust is applied to the side of the adjusting mounting plate 10, the roller can be easily pushed to slide along the guide rail 8.

[0036] Specifically, the specific structural style of the spacing adjustment drive mechanism in this embodiment is as follows: The spacing adjustment drive mechanism includes a drive motor 11, a worm gear reducer 12 connected to the output end of the drive motor 11, an active worm gear screw jack 13 mounted on one side wall plate 101 of the top of the frame 1 and connected to the output end of the worm gear reducer 12, a secondary worm gear screw jack 15 mounted on the other side wall plate 101 of the top of the frame 1 and connected to the active worm gear screw jack 13 via a drive shaft 14, an active pressing plate 16 connected to the output end of the active worm gear screw jack 13 that outputs linear motion, and a secondary pressing plate 17 connected to the output end of the secondary worm gear screw jack 15 that outputs linear motion. The active pressing plate 16 and the secondary pressing plate 17 push the adjustment mounting plate 10 tightly under the drive of the drive motor 11 to achieve spacing adjustment. It should be noted that the drive motor 11, worm gear reducer 12, active worm gear screw jack 13, and auxiliary worm gear screw jack 15 are all existing purchased products. After assembly, they can output linear motion, so their internal structure will not be described in detail here.

[0037] During adjustment, the drive motor 11 is started, driving the worm gear reducer 12, which in turn drives the output end of the active worm gear screw jack 13, which outputs linear motion, to move back and forth. When moving forward, the active pressure plate 16 on one side of the roller body pushes the adjustment mounting plate 10 tightly. At the same time, the output end of the auxiliary worm gear screw jack 15, driven by the transmission shaft 14, also drives the auxiliary pressure plate 17 to push the adjustment mounting plate 10 on the other side of the roller body. Thus, the roller body changes position under the push of the active pressure plate 16 and the auxiliary pressure plate 17 to adjust the distance between the two roller bodies. During this adjustment process, the active pressure plate 16 and the auxiliary pressure plate 17 are symmetrically arranged and push the two ends of the roller body evenly at the same time, so that the pushed roller body will not be tilted.

[0038] In this application, the mold roller 3 includes an inner roller body 18, a sealing roller sleeve 19 fitted onto the inner roller body 18, and a mold roller sleeve 20 fitted onto the sealing roller sleeve 19. The inner roller body 18 has an inlet channel and an outlet channel. A cooling channel is formed between the inner roller body 18 and the sealing roller sleeve 19 along its length. The cooling channel is connected to the inlet channel and the outlet channel, respectively, and coolant flows through the inlet channel, cooling channel, and outlet channel. Therefore, because of the sealing roller sleeve 19, the coolant does not flow out from the cooling channel.

[0039] Specifically, regarding the arrangement of each channel, in this embodiment, one end of the inner roller body 18 has a stepped blind hole extending from its end face to near the other end. A composite liquid pipe 21 is sealed and connected to the opening end of the stepped blind hole at one end of the inner roller body 18. The composite liquid pipe 21 has an inlet end 22 and an outlet end 23. An inlet pipe 24 is inserted into the stepped blind hole. The outlet of the inlet pipe 24 is located in a small-diameter hole 25 near the inner edge of the stepped blind hole. The inlet end of the inlet pipe 24 is sealed and inserted into the composite liquid pipe 21 and communicates with the inlet end 22 of the composite liquid pipe 21. It should be noted that after the inlet pipe 24 is sealed and receptacleed, there is a gap between the outer circumferential sidewall of the inlet pipe 24 and the composite liquid pipe 21, allowing the coolant to flow out through this gap to the outlet end 23.

[0040] The inner roller body 18 has a spiral groove 26 extending along its length on its outer side wall. The spiral opening extending along the length of the spiral groove 26 is covered by the sealing roller sleeve 19. The spiral groove 26 forms the cooling channel. The inner roller body 18 has a liquid inlet connection hole 27 at the end of the small diameter hole 25 to connect the small diameter hole 25 with the spiral groove 26 at that position. The inner roller body 18 has a liquid outlet connection hole 29 at the root of the large diameter hole 28 near the stepped blind hole to connect the large diameter hole 28 with the spiral groove 26 at that position. The large diameter hole 28 is connected to the liquid outlet end 23 of the composite liquid pipe 21. The liquid inlet end 22, the liquid inlet pipe 24, the small diameter hole 25, and the liquid inlet connection hole 27 form a liquid inlet channel. The liquid outlet connection hole 29, the large diameter hole 28, and the liquid outlet end 23 form a liquid outlet channel.

[0041] In this disclosure, the spiral grooves 26 are further optimized and improved by providing multiple spiral grooves 26. Specifically, this embodiment provides three spiral grooves, each with an inlet connection hole 27 at the inlet and an outlet connection hole 29 at the outlet. Thus, three spiral grooves 26 are respectively provided on the outer circumferential wall of the inner roller body 18, forming three inlet connection holes 27 at the inlet and three outlet connection holes 29 at the outlet. This multi-spiral groove structure allows for the formation of three cooling channels during actual cooling, while ensuring that the coolant in each channel does not cross-contaminate, thus guaranteeing that the coolant flows within its respective channel for cooling. Compared to cooling through a single channel, experimental verification shows that the cooling effect is significantly better, the cooling speed is faster, and the quality of the produced plastic hooks is superior.

[0042] It should be noted that in this embodiment, the other three rollers are also provided with cooling structures, but the mold roller sleeve 20 can be omitted. In this embodiment, the mold roller sleeve 20 on the mold roller 3 includes a mold sleeve 201 for forming hooks and fitting on the sealing roller sleeve 19, and a fastening kit for tightly mounting the mold sleeve 201 on the sealing roller sleeve 19. In particular, the mold sleeve 201 has a protruding limiting ring 2011 at one end. The fastening kit is provided in two sets, located at both ends of the sealing roller sleeve 19, and each set includes a threaded fastening sleeve 202, a retaining sleeve 203, and a clamping sleeve 204. The sealing roller sleeve 19 has external threads on its outer peripheral sidewalls at both ends. The threaded fastening sleeve 202 is threadedly connected to the external threads to secure it to the end of the sealing roller sleeve 19. At this time, the retaining sleeve 203 is fitted onto the sealing roller sleeve 19, and the abutting sleeve 204 is fitted onto the mold sleeve 201. The retaining sleeve 203 is tightly abutted between the threaded fastening sleeve 202 and the abutting sleeve 204. The inner sidewalls of the opposite ends of the retaining sleeve 203 and the abutting sleeve 204 are provided with radially outwardly recessed annular receiving groove 2031. The limiting ring 2011 is located in this annular receiving groove 2031, and the end of the abutting sleeve 204 abuts against the limiting ring 2011. With this arrangement, the mold sleeve 201 can be secured to the sealing roller sleeve 19.

[0043] Example 2

[0044] Unlike Embodiment 1, the sliding structure includes a guide rail 8 and a slider 9 that are mutually fitted together. The slider 9 is located at the top of the frame 1, and the guide rail 8 is located at the bottom of the adjusting mounting plate 10. The adjusting mounting plate 10 is mounted on the end of the corresponding roller. It should be noted that this embodiment is not shown in the accompanying drawings, and it can be understood that the mounting carriers of the guide rail 8 and the slider 9 are interchangeable with those in Embodiment 1.

[0045] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A plastic hook forming device based on horizontal arrangement, comprising a frame and a forming roller assembly mounted on the frame, wherein the forming roller assembly includes an extrusion roller, a die roller, a shaping roller, and a discharge roller arranged sequentially along the product forward direction; characterized in that: The extrusion roller and the discharge roller are slidably connected to the frame through a sliding structure that is matched with the frame. The frame is provided with a spacing adjustment drive mechanism on the front side of the extrusion roller and the rear side of the discharge roller. The spacing adjustment drive mechanism on the front side of the extrusion roller drives the extrusion roller to slide on the frame to adjust the spacing between the extrusion roller and the mold roller. The spacing adjustment drive mechanism on the rear side of the discharge roller drives the discharge roller to slide on the frame to adjust the spacing between the discharge roller and the shaping roller. The extrusion roller, die roller, shaping roller, and discharge roller are all equipped with independently driven servo motors; At least one of the forming rollers is equipped with a cooling structure that allows coolant to circulate without leakage.

2. The horizontally based plastic hook forming apparatus of claim 1, wherein, The sliding structure includes a guide rail and a slider that are mutually matched. The slider is located at the bottom of the adjustment mounting plate, the adjustment mounting plate is mounted at the end of the corresponding roller, and the guide rail is mounted at the top of the frame.

3. The horizontal setting based plastic hook forming apparatus according to claim 1, wherein The sliding structure includes a guide rail and a slider that are matched together. The slider is located at the top of the frame, the guide rail is located at the bottom of the adjustment mounting plate, and the adjustment mounting plate is mounted on the end of the corresponding roller.

4. The horizontal setting-based plastic hook forming apparatus according to claim 2 or 3, characterized by The spacing adjustment drive mechanism includes a drive motor, a worm gear reducer connected to the output end of the drive motor, an active worm gear screw jack mounted on one side of the top of the frame and connected to the output end of the worm gear reducer, a secondary worm gear screw jack mounted on the other side of the top of the frame and connected to the active worm gear screw jack via a drive shaft, an active pressing plate connected to the output end of the active worm gear screw jack that outputs linear motion, and a secondary pressing plate connected to the output end of the secondary worm gear screw jack that outputs linear motion. The active pressing plate and the secondary pressing plate push the adjustment mounting plate tightly under the drive of the drive motor to achieve spacing adjustment.

5. The horizontally based plastic hook forming apparatus of claim 1, wherein, The mold roller includes an inner roller body, a sealing roller sleeve fitted on the inner roller body, and a mold roller sleeve fitted on the sealing roller sleeve. The inner roller body is provided with an inlet channel and an outlet channel. A cooling channel is formed between the inner roller body and the sealing roller sleeve along the length direction of the mold roller. The cooling channel is connected to the inlet channel and the outlet channel respectively. Coolant flows in the inlet channel, the cooling channel, and the outlet channel.

6. The horizontally based plastic hook forming apparatus of claim 5, wherein, One end of the inner roller body has a stepped blind hole extending from that end face to near the other end. A composite liquid pipe is sealed and connected to the opening end of the stepped blind hole at one end of the inner roller body. The composite liquid pipe has an inlet end and an outlet end. An inlet pipe is inserted into the stepped blind hole, and the outlet of the inlet pipe is located in a small-diameter hole near the inner part of the stepped blind hole. The inlet end of the inlet pipe is sealed and inserted into the composite liquid pipe and communicates with the inlet end of the composite liquid pipe. The outer side wall of the inner roller body has a spiral groove extending along its length. The extending spiral opening is sealed by a sealing roller sleeve, and the spiral groove forms the cooling channel. The inner roller body has a liquid inlet connection hole at the end of the small diameter hole to connect the small diameter hole with the spiral groove at that position. The inner roller body has a liquid outlet connection hole at the root of the large diameter hole near the stepped blind hole to connect the large diameter hole with the spiral groove at that position. The large diameter hole is connected to the liquid outlet end of the composite liquid pipe. The liquid inlet end, liquid inlet pipe, small diameter hole, and liquid inlet connection hole form a liquid inlet channel. The liquid outlet connection hole, large diameter hole, and liquid outlet end form a liquid outlet channel.

7. The horizontally based plastic hook forming apparatus of claim 1, wherein, The mold roller and the shaping roller are fixedly installed on the machine frame.

8. The horizontally based plastic hook forming apparatus of claim 7, wherein, The mold roller and the shaping roller are assembled on the same side at the same mounting plate and then fixed to the frame.

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