Horizontal production line for plastic hooks

Abstract

The invention relates to a plastic hook horizontal type production line which comprises a plasticizing conveying section, an air cooling housing arranged on the plasticizing conveying section in a sleeving mode, an extrusion die, an extrusion roller, a die roller, a shaping roller and a discharging roller, the air cooling housing is provided with a plurality of air cooling cavities, and each air cooling cavity is provided with a draught fan. A discharging port of the extrusion die is arranged downwards and located above a gap between the extrusion roller and the die roller, the die roller is provided with an inner roller body and a sealing roller sleeve arranged on the inner roller body in a sleeved mode, a liquid inlet channel and a liquid outlet channel are formed in the inner roller body, and after the sealing roller sleeve is arranged on the inner roller body in a sleeved mode, a sealing cooling channel is formed between the sealing roller sleeve and the inner roller body. The sealed cooling channel is communicated with the liquid inlet channel and the liquid outlet channel, and cooling liquid circulates in the liquid inlet channel, the sealed cooling channel and the liquid outlet channel. According to the horizontal production line for the plastic hooks, material stacking is avoided, the liquid leakage phenomenon is avoided, and the multi-stage air cooling effect can be achieved.

Description

Technical Field

[0001] This disclosure relates to the field of plastic hook manufacturing technology, and more particularly to a horizontal production line for plastic hooks. Background Technology

[0002] Plastic hooks, also known as Velcro, involve two important stages in their molding process: plasticizing the plastic particles and forming the hooks. Currently, the mainstream method for plasticizing the particles is through a screw conveyor. During conveying, heating elements heat the plastic particles to achieve a plasticized state, and then they are extruded from the mold outlet by the screw conveyor and enter the plastic hook forming roller assembly. They then pass through each roller sequentially to form the desired hook texture. In this series of production processes, it is particularly important to effectively control the temperature during plasticizing and to cool the hook texture promptly during forming. Achieving effective control of both significantly impacts the quality of the plastic hooks.

[0003] For example, the invention patent application with publication number CN118288515A discloses a hook and loop fastener production equipment. In order to achieve timely cooling, liquid cooling chambers are opened inside each roller in the hook and loop fastener production equipment. However, for the mold roller, several forming micro-holes are also opened on the outer circumferential wall of the mold roller. 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, which cannot play a real cooling effect, resulting in poor quality of the produced plastic hooks. Summary of the Invention

[0004] This disclosure aims to address at least one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, this disclosure provides a plastic hook-type horizontal production line, including a frame one, a plasticizing conveyor line mounted on the frame one, an extrusion die for receiving the material output from the plasticizing conveyor line, a frame two, and a forming roller assembly mounted on the frame two.

[0006] The plasticizing conveyor line is equipped with an air-cooled cover in the plasticizing conveying section. The air-cooled cover is divided into multiple air-cooled chambers arranged sequentially along the length of the plasticizing conveying section by partitions. Each air-cooled chamber is equipped with a fan. The air-cooled chamber is provided with an air inlet end that is connected to the air outlet of the fan. The air-cooled chamber is also provided with a vent end.

[0007] The forming roller assembly includes an extrusion roller, a die roller, a shaping roller, and a discharge roller arranged sequentially along the product's forward direction. The discharge port of the extrusion die is positioned downwards and above the gap between the extrusion roller and the die roller.

[0008] The forming roller group includes at least one mold roller having an inner roller body and a sealing roller sleeve that is fitted onto the inner roller body. The inner roller body has a liquid inlet channel and a liquid outlet channel. After the sealing roller sleeve is fitted onto the inner roller body, a sealed cooling channel is formed between the sealing roller sleeve and the inner roller body along the length direction of the mold roller. The sealed cooling channel is connected to the liquid inlet channel and the liquid outlet channel, respectively. Coolant flows through the liquid inlet channel, the sealed cooling channel, and the liquid outlet channel.

[0009] In one feasible embodiment, the plasticizing conveying section has an elongated barrel, inside which is a spiral conveying shaft driven to rotate by a servo motor. The elongated barrel is fitted with several heating coils. The spiral conveying shaft is a conical shaft, and the outer diameter of the conical shaft gradually increases from the front end to the rear end. Consequently, the gap between the spiral conveying shaft and the barrel gradually decreases from the front end to the rear end.

[0010] In one feasible implementation, the air-cooled housing is assembled from multiple sub-shells in a front-to-back sequence. Each sub-shell includes an upper shell and a lower shell that are symmetrically assembled vertically. The upper shell and the lower shell have inwardly extending splicing walls at least at the splicing points along their length to achieve splicing between the upper shell and the lower shell. Both the upper shell and the lower shell have a front end wall and a rear end wall. The front end walls of the upper shell and the lower shell are spliced ​​vertically to form the front sealing wall of the sub-shell, and the rear end walls of the upper shell and the lower shell are spliced ​​vertically to form the rear sealing wall of the sub-shell.

[0011] Preferably, the air-cooled cavity is formed between the shell and the barrel, the air inlet is a mounting hole at the bottom of the lower shell for mounting the air outlet of the blower, and the vent is located at the top of the upper shell and has a vent outlet.

[0012] In one feasible implementation, the vent outlet is an elongated vent hole opened on the top of the upper housing, and the elongated vent hole is provided with a vent cap along its length direction, and the vent cap forms openings at both ends in the length direction to allow gas to pass through.

[0013] In one feasible embodiment, the extrusion die includes a left die and a right die connected together. One of the left die and the right die has an elongated notch along the length of the discharge port on the outer side wall near the lower end of the discharge port. The outer side wall near the lower end of the discharge port also has an elongated slot along the length of the discharge port above the elongated notch. A plurality of adjusting tightening holes are arranged along the length of the slot on the lower wall. Part of the adjusting tightening holes is on the upper wall between the slot and the notch, and another part is on the lower wall of the notch. An adjusting rod is screwed into the adjusting tightening holes to adjust the width of the discharge port.

[0014] Preferably, the elongated notch has a concave arc bottom, and the distance between the upper and lower walls of the elongated notch gradually increases; the elongated groove is an elongated right-angled groove, and the lower wall of the elongated right-angled groove is basically parallel to the elongated notch.

[0015] In one feasible embodiment, 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 tip 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 inner roller body. The spiral opening extending along the length of the groove is sealed by a sealing roller sleeve, and the spiral groove forms the sealed 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.

[0016] Preferably, multiple spiral grooves are provided on the outer side wall of the inner roller body, and each groove has an inlet connection hole and an outlet connection hole.

[0017] In one feasible implementation, the liquid inlet channel, the sealed cooling channel, and the liquid outlet channel together constitute a cooling structure, and the extrusion roller, the shaping roller, and the discharge roller are also provided with the cooling structure.

[0018] In one feasible embodiment, the mold roller further includes a mold roller sleeve fitted onto a sealing roller sleeve, the mold roller sleeve including a mold sleeve for forming hooks and fitting on the sealing roller sleeve, and a fastening kit for tightly mounting the mold sleeve onto the sealing roller sleeve.

[0019] Preferably, the mold sleeve has a protruding limiting ring at one end. The fastening kit has two sets, located at both ends of the sealing roller sleeve. Each set includes a threaded fastening sleeve, a retaining sleeve, and a retaining sleeve. The outer peripheral sidewalls of both ends of the sealing roller sleeve are respectively provided with external threads. The threaded fastening sleeve is threadedly connected to the external threads to fasten to the end of the sealing roller sleeve. The retaining sleeve is sleeved on the sealing roller sleeve, and the retaining sleeve is sleeved on the mold sleeve. The retaining sleeve is tightly pressed between the threaded fastening sleeve and the retaining sleeve. The inner sidewalls of the opposite ends of the retaining sleeve and the retaining sleeve are provided with radially outward recesses to form an annular receiving groove. The limiting ring is located in the annular receiving groove, and the end of the retaining sleeve is tightly pressed against the limiting ring.

[0020] Compared with the prior art, this disclosure has at least the following beneficial effects: By continuously setting up multiple air-cooling chambers, this disclosure forms segmented cooling on the plasticizing conveying section, thereby forming graded and precise temperature control. Each air-cooling chamber can be individually air-cooled, and precise temperature control can be formed at that point to meet the temperature requirements of different raw materials at different locations on the plasticizing conveying section, which has versatility. At the same time, the graded and precise temperature control formed by segmented cooling significantly enhances the plasticizing effect.

[0021] The discharge port of the extrusion die disclosed herein faces downward and is located above the gap between the extrusion roller and the die roller. The plasticized plastic flows vertically downward from the discharge port directly into the gap between the extrusion roller and the die roller, without forming a material accumulation phenomenon.

[0022] The mold roller disclosed herein, in addition to having an inner roller body, also has a sealing roller sleeve on the inner roller body. The sealing roller sleeve and the inner roller body together form a cooling structure with a liquid inlet channel, a sealed cooling channel, and a liquid outlet channel. This cooling structure not only solves the cooling problem but also effectively solves the problem of liquid leakage. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of exemplary embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0026] Figure 1 This is a partial three-dimensional structural schematic diagram of the present disclosure;

[0027] Figure 2 This is one of the partial three-dimensional structural schematic diagrams of the plasticizing conveyor line disclosed herein;

[0028] Figure 3 This is the second partial three-dimensional structural schematic diagram of the plasticizing conveyor line disclosed herein.

[0029] Figure 4 This is a partial three-dimensional structural schematic diagram of the air-cooled housing disclosed herein;

[0030] Figure 5 This is a partial three-dimensional structural diagram of the screen structure disclosed herein;

[0031] Figure 6 This is a partial three-dimensional structural schematic diagram of the extrusion die disclosed herein;

[0032] Figure 7 This is a partial cross-sectional schematic diagram of the mold roller disclosed herein;

[0033] Figure 8 for Figure 7 Enlarged diagram of point A in the diagram. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0035] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0036] Currently, for plastic hook production lines: during the plasticizing and conveying process, it is difficult to achieve the required precise temperature control on the plasticizing and conveying section, and the precise temperature control requirements are not the same for different plastics; during the molding process, while meeting the molding requirements, timely cooling also needs to be considered, and during cooling, while ensuring the flow of coolant, leakage must also be avoided.

[0037] Based on this, the following detailed description of the horizontal plastic hook production line will be provided through specific embodiments:

[0038] Reference Figures 1 to 8 As shown, this disclosure provides a horizontal plastic production line, including a frame 100, a plasticizing conveyor line 200 mounted on the frame 100, an extrusion die 300 for receiving the material output from the plasticizing conveyor line 200, a second frame 400, and a forming roller assembly 500 mounted on the second frame 400. The material output from the plasticizing conveyor line 200 can be understood as material output from the plasticizing conveyor line 200.

[0039] The plasticizing conveyor line 200 is fitted with an air-cooled cover 1 in the plasticizing conveying section 201. The air-cooled cover 1 is divided by a partition 2 into multiple air-cooled chambers 3 arranged sequentially along the length of the plasticizing conveying section 201. Each air-cooled chamber 3 is equipped with a fan (not shown). The air-cooled chamber 3 has an air inlet end that connects to the air outlet of the fan, and the air-cooled chamber 3 also has a vent end. The plasticizing conveyor line 200 is mainly used to plasticize plastic particles. During plasticizing, the plasticizing conveyor line 200 also has a funnel dryer 600 for drying the plastic particles and feeding the dried plastic particles into the plasticizing conveying section 201. The plasticizing conveying section 201 mainly includes a long cylinder 4 and a spiral conveying shaft (not shown) located inside the cylinder 4. The spiral conveying shaft is driven to rotate by a servo motor 202 of the plasticizing conveying line 200. A reducer 203 is installed between the servo motor 202 and the spiral conveying shaft. After being reduced in speed by the reducer 203, the spiral conveying shaft is then driven. In this disclosure, the plasticizing conveying line 200 has multiple air-cooling chambers 3 arranged sequentially along the length of the plasticizing conveying section 201. It can be understood that the air-cooling chambers 3 are arranged along the entire length of the plasticizing conveying section 201, and each air-cooling chamber 3 is independent of each other and does not interfere with each other. Thus, multiple control sections with individually controllable air-cooling effects are formed in the plasticizing conveying section 201. Each section can be air-cooled independently, thereby allowing for precise control of the required temperature of that section. This enables multi-level precise temperature control and adjustment. Compared with existing single temperature control, this disclosure provides multi-segment air-cooling control according to plasticizing needs to form multi-level precise temperature control, ultimately optimizing the plasticizing effect. Furthermore, different plastic particles require different temperatures in the plasticizing conveying section 201. This disclosure, through the setting of multiple air-cooled chambers 3, can meet the precise adjustment of different temperature requirements, so as to achieve high-quality plasticizing of various plastic particles.

[0040] The forming roller assembly 500 includes an extrusion roller 6, a die roller 7, a shaping roller 8, and a discharge roller 9 arranged sequentially along the product's forward direction. The discharge port 301 of the extrusion die 300 is downward-facing and located above the gap between the extrusion roller 6 and the die roller 7. The extrusion roller 6, die roller 7, shaping roller 8, and discharge roller 9 are arranged at approximately the same height and horizontally. During forming, the plasticized plastic flows vertically downward from the discharge port 301 and directly enters the gap between the extrusion roller 6 and the die roller 7. The material is immediately squeezed and enters the next process after flowing down, preventing accumulation and waste, and facilitating rapid material movement to the next process.

[0041] The forming roller group 500 includes at least one mold roller 7 having an inner roller body 701 and a sealing roller sleeve 702 that is fitted onto the inner roller body 701. The inner roller body 701 is provided with an inlet channel and an outlet channel. After the sealing roller sleeve 702 is fitted onto the inner roller body 701, a sealed cooling channel is formed between the sealing roller sleeve 702 and the inner roller body 701 along the length direction of the mold roller 7. The sealed cooling channel is connected to the inlet channel and the outlet channel, respectively. Coolant flows through the inlet channel, the sealed cooling channel, and the outlet channel. The mold roller 7 is mainly used to form hooks and fuzz. It has very strict requirements for temperature. The plastic after plasticization has a high temperature. It needs to be cooled and effectively controlled during molding. Therefore, in this disclosure, the mold roller 7 is preferably provided with the above-mentioned channels. The coolant flows in each channel in sequence. The sealed cooling channel is set along the length of the mold roller 7, which can cool the mold roller 7 as a whole in the length direction as required. More importantly, the sealed cooling channel is in a sealed state and will not leak. In implementation, a sealing roller sleeve 702 is set and sealed on the inner roller body 701, thereby achieving the design effect of sealing and preventing leakage.

[0042] In this disclosure, in order to achieve plasticization of plastic particles, it is necessary to heat the plastic particles. Specifically, the barrel 4 of this disclosure is equipped with several heating coils (not shown). The heating coils are arranged one after another closely on the barrel 4 and are set along the entire plasticization section of the barrel 4 to ensure that there are heating coils in the entire plasticization section of the barrel 4.

[0043] The specific structure of the screw conveyor shaft has also been optimized and improved in this disclosure. The screw conveyor shaft is constructed as a tapered shaft with a slight taper. The outer diameter of the tapered shaft gradually increases from the front end to the rear end, thereby gradually reducing the gap between the screw conveyor shaft and the material cylinder 4 from the front end to the rear end. This gradual reduction in gap ensures the conveying speed at the rear end. It should be noted that the gradual reduction in gap in this disclosure is a slight decrease; the overall gap still meets the material conveying requirements. It is simply an appropriate reduction in gap, especially at the rear end where a smaller gap is obtained, which is beneficial for ensuring the conveying speed.

[0044] In this embodiment, the air-cooled housing 1 is assembled from multiple sub-shells 101 in a front-to-back sequence. Each sub-shell 101 includes an upper shell 1011 and a lower shell 1012 that are symmetrically assembled vertically. The upper shell 1011 and the lower shell 1012 are provided with inwardly extending splicing walls 1013 at least at the splicing points in the length direction to achieve splicing of the upper shell 1011 and the lower shell 1012. Both the upper shell 1011 and the lower shell 1012 have a front end wall and a rear end wall. The front end walls of the upper shell 1011 and the lower shell 1012 are spliced ​​vertically to form the front sealing wall 1014 of the sub-shell 101, and the rear end walls of the upper shell 1011 and the lower shell 1012 are spliced ​​vertically to form the rear sealing wall 1015 of the sub-shell 101. The front sealing wall 1014 and the rear sealing wall 1015 can be understood as the partition 2. It is evident that a single shell 101 is a relatively closed space, and it does not affect the internal spaces of other adjacent shells 101.

[0045] In this disclosure, by setting the splicing wall 1013, on the one hand, the splicing wall 1013 increases the splicing area, making it easier to align and splice during splicing; on the other hand, after splicing, the splicing area increases, and the overall connection stability is stronger. The split shell 101, formed by the splicing of the upper shell 1011 and the lower shell 1012, is easily fitted onto the material cylinder 4. After assembling one split shell 101, the second split shell 101 is installed next to the material cylinder 4, and so on until all are installed. The split shells 101 are set close together, which helps to securely mount them onto the material cylinder 4 without interruption. Thus, during use, the material cylinder 4 can continuously form multi-stage segmented temperature control, and each air-cooling chamber 3 does not interfere with each other. Each air-cooling chamber 3 is equipped with a fan, which means that the air-cooling state in each air-cooling chamber 3 can be controlled independently. This allows for individual and precise temperature control of that segment, which is particularly suitable for plasticizing. Because the required temperature varies from the front end to the back end during the entire plasticizing process, the corresponding fan can be turned on to control the temperature in the air-cooling chamber at different locations, thereby obtaining the required precise temperature. It can be seen that precise control can be truly implemented.

[0046] In this disclosure, the air-cooled chamber 3 is formed between the shell 101 and the barrel 4. The air inlet is a mounting hole 1016 located at the bottom of the lower shell 1012 for mounting the air outlet of the fan. The vent is located at the top of the upper shell 1011 and has a vent outlet 1017. The air-cooled chamber 3 exists independently and is matched with a separate fan, ultimately achieving precise and individual temperature control at that location. The vent outlet 1017 also prevents excessive pressure from protecting the shell 101, thereby extending its service life.

[0047] Furthermore, the vent can be constructed in various ways. In this disclosure, the main construction is as follows: the vent outlet 1017 is an elongated vent hole on the top of the upper housing 1011. A vent cap 1018 is provided along the length of this elongated vent hole, and the vent cap 1018 forms openings 1019 at both ends along its length to allow gas to escape. The vent cap 1018 ensures that high-pressure gas escapes from both ends, rather than spraying directly from above. This provides safety protection because when inspecting the area, workers typically bend slightly upwards and lie over the plasticizing conveying section 201. If high-pressure gas were to spray directly from above, it would hit the workers. However, by escaping from both ends of the vent cap 1018, the high-pressure gas will not hit the workers.

[0048] In this disclosure, the extrusion die 300 includes a left die 302 and a right die 303 connected together. One of the left die 302 and the right die 303 has an elongated notch 304 arranged along the length of the discharge port 301 on the outer side wall near the lower end of the discharge port 301. An elongated slot 305 arranged along the length of the discharge port 301 is also provided above the elongated notch 304 on the outer side wall near the lower end of the discharge port 301. A plurality of adjusting tightening holes 306 arranged along the length direction are provided on the lower wall of the elongated slot 305. A part of the adjusting tightening hole 306 is on the upper wall between the elongated slot 305 and the elongated notch 304, and another part is on the lower wall of the elongated notch 304. An adjusting rod (not shown) is screwed into the adjusting tightening hole 306 to adjust the width of the discharge port 301.

[0049] In actual adjustment, the adjusting rod, usually the adjusting screw, is screwed into the adjusting tightening hole 306. As the screwing depth increases, the width of the discharge port 301 can be effectively changed. This is particularly suitable for extrusion dies 300 with adjustable discharge port 301 width, as different plastic particles require different discharge port 301 widths. In addition, sometimes it is necessary to adjust the sheet thickness of different plastic hooks, and adjustment can also help to obtain the sheet thickness required.

[0050] In this disclosure, the main reason for the ability to adjust is the inclusion of an elongated notch 304. This notch also features a concave, rounded bottom, and the distance between the upper and lower walls of the notch 304 gradually increases. This further optimization of the structure, combined with the basic design of the notch 304, allows for slight localized elastic deformation of the walls at both the upper and lower parts of the notch. As the adjusting screw is screwed in and out, a slight change in the width of the discharge port 301 can be achieved, thus realizing the adjustment. Furthermore, the design of the elongated slot 305, along with its optimized angle (e.g., the elongated right-angle slot 305, with its lower wall essentially parallel to the notch 304), provides operating space and a platform for the screwing in and out, facilitating the overall adjustment operation.

[0051] In this disclosure, the internal structure of the inner roller body 701 is configured as follows: Specifically, one end of the inner roller body 701 has a stepped blind hole extending from the end face to near the other end. A composite liquid pipe 10 is sealed and connected to the opening end of the stepped blind hole at one end of the inner roller body 701. The composite liquid pipe 10 has an inlet end 11 and an outlet end 12. An inlet pipe 13 is inserted into the stepped blind hole. The outlet of the inlet pipe 13 is located in a small-diameter hole 14 near the inner part of the stepped blind hole. The inlet front end of the inlet pipe 13 is sealed and inserted into the composite liquid pipe 10 and communicates with the inlet end 11 of the composite liquid pipe 10. A spiral groove 15 extending along its length is provided on the outer side wall of the inner roller body 701. The spiral opening (unmarked) extending in the degree direction is sealed by the sealing roller sleeve 702. The spiral groove 15 forms the sealed cooling channel. The inner roller body 701 has a liquid inlet connection hole 16 at the end of the small diameter hole 14 to connect the small diameter hole 14 and the spiral groove 15 at that position. The inner roller body 701 has a liquid outlet connection hole 18 at the root of the large diameter hole 17 near the stepped blind hole to connect the large diameter hole 17 and the spiral groove 15 at that position. The large diameter hole 17 is connected to the liquid outlet end 12 of the composite liquid pipe 10. The liquid inlet end 13, the liquid inlet pipe 13, the small diameter hole 14, and the liquid inlet connection hole 16 together form the liquid inlet channel. The liquid outlet connection hole 18, the large diameter hole 17, and the liquid outlet end 12 together form the liquid outlet channel.

[0052] In this disclosure, the unique structural arrangement described above, particularly the stepped blind hole arrangement, allows coolant to flow out sequentially from the gap between the inlet pipe 13 and the large-diameter hole 17, the gap between the inlet pipe 13 and the composite liquid pipe 10, and the outlet end 12. Specifically, in this disclosure, the composite liquid pipe 10 also features stepped holes, where the larger diameter channel in the stepped hole connects to the outlet end 12 and the large-diameter hole 17. This allows coolant to flow out sequentially from the gap between the inlet pipe 13 and the large-diameter hole 17, the gap between the inlet pipe 13 and the composite liquid pipe 10, and the outlet end 12. Meanwhile, the smaller diameter channel in the stepped hole serves as a sealing insertion point for the inlet front end of the inlet pipe 13 at one end, and connects to the inlet end 11 at the other end. This achieves both a sealed insertion of the inlet pipe 13 and allows coolant to enter the smaller diameter channel from the inlet end 11, thus entering the inlet pipe 13.

[0053] It should be noted that, in this disclosure, the outer diameter of the inlet pipe 13 is smaller than the larger diameter channel and the large diameter hole 17 on the composite liquid pipe 10, so as to ensure that the coolant can flow out sequentially from the gap between the inlet pipe 13 and the large diameter hole 17, the gap between the inlet pipe 13 and the composite liquid pipe 10, and the outlet end 12.

[0054] In this disclosure, after the coolant passes through the inlet channel located inside the inner roller body 701, it flows through the spiral groove 15 and moves forward in a 360-degree spiral along the outer circumferential wall of the inner roller body 701 for cooling. Compared with the prior art, cooling is performed directly on the outer circumferential wall, which is closer to the plasticized plastic, resulting in better cooling effect and less energy loss. More importantly, the coolant forms a 360-degree spiral, resulting in a large contact area and an extended cooling path, which prolongs the flow time of the coolant and further improves the cooling effect.

[0055] Specifically, in this disclosure, both the inlet and outlet channels are located inside the inner roller body 701. Only one inlet pipe 13 is needed inside the inner roller body 701 to allow the coolant to enter, while the coolant can still flow out through the gap between the inlet pipe 13 and the large-diameter hole 17. It can be seen that the function of the inlet pipe 13 is fully utilized, and it is fully utilized in both inlet and outlet processes. This greatly simplifies the internal structure of the inner roller body 701 and avoids the need for multiple pipes inside, such as in the prior art where both inlet and outlet pipes are provided inside the roller body.

[0056] In this disclosure, the spiral groove 15 is also provided with multiple grooves on the outer side wall of the inner roller body 701. Each groove has an inlet connection hole 16 and an outlet connection hole 18. By providing multiple spiral grooves 15, multiple sealed cooling channels can be formed on the outer circumferential side wall of the inner roller body 701. Compared with a single sealed cooling channel, the natural cooling effect of multiple sealed cooling channels is greatly increased, the cooling time is greatly reduced, and the final production efficiency is significantly improved.

[0057] Considering that other rollers should also be cooled as much as possible, in this disclosure, the liquid inlet channel, the sealed cooling channel, and the liquid outlet channel are collectively constructed into a cooling structure. The extrusion roller 6, the shaping roller 8, and the discharge roller 9 are also provided with the aforementioned cooling structure. The specific settings are basically similar and will not be described in detail here.

[0058] In this disclosure, because the mold roller 7 needs to form hooks and fur, the mold roller 7 also includes a mold roller sleeve fitted onto the sealing roller sleeve 702. The mold roller sleeve includes a mold sleeve 703 for forming hooks and fur and fitted onto the sealing roller sleeve 702, and a fastening kit for tightly mounting the mold sleeve 703 onto the sealing roller sleeve 702. At this time, the inner circumferential sidewall of the mold sleeve 703 is in close contact with the outer circumferential sidewall of the sealing roller sleeve 702 for cooling. The mold sleeve 703 is mainly used to form the hooks and fur. As for the specific structure and how it is implemented, it is basically conventional technology and will not be described in detail here.

[0059] In this disclosure, the mold sleeve 703 has a radially protruding limiting ring 704 at one end. Two sets of fastening components are provided, located at both ends of the sealing roller sleeve 702. Each set includes a threaded fastening sleeve 705, a retaining sleeve 706, and a clamping sleeve 707. External threads are provided on the outer peripheral sidewalls of both ends of the sealing roller sleeve 702. The threaded fastening sleeve 705 is threadedly connected to the external threads to fasten to the end of the sealing roller sleeve 702. The retaining sleeve 706 is sleeved on the sealing roller sleeve 702. The clamping sleeve 707 is fitted onto the mold sleeve 703, and the retaining sleeve 706 is clamped between the threaded fastening sleeve 705 and the clamping sleeve 707. The inner sidewall of the opposite end of the retaining sleeve 706 and the clamping sleeve 707 is provided with a radially outward recess to form an annular receiving groove 708. The limiting ring 704 is located in the annular receiving groove 708, and the end of the clamping sleeve 707 clamps against the limiting ring 704. Through the cooperation of the above components, the mold sleeve 703 can be tightly fitted onto the sealing roller sleeve 702.

[0060] In this disclosure, a screen structure 700 is further provided at the rear end of the plasticizing conveying section 201. The screen structure 700 includes a screen plate, a front plate 701 located at the front end of the screen plate, and a rear plate 702 located at the rear end of the screen plate. The screen plate includes an upper connecting beam 703, a lower connecting beam 704, a screen plate 705 located between the upper connecting beam 703 and the lower connecting beam 704, and a cylinder 706 mounted at the ends of the upper connecting beam 703 and the lower connecting beam 704. The output end of the cylinder 706 is connected to the screen. A screen plate 705 is provided with a first screen 707 and a second screen 708 along its moving direction. A cylinder 706 drives the screen plate 705 to move, allowing either the first screen 707 or the second screen 708 to enter between the front plate 701 and the rear plate 702 for filtration. The exposed screen can then remove impurities. This allows for continuous production without stopping the machine, even when screen removal is required. It should be noted that the material passages (not shown) on the front plate 701 and the rear plate 702 are coaxially aligned with the screens located between them. In this disclosure, the first screen 707 and the second screen 708 are integrated and installed on the screen plate 705. By using the drive of the cylinder 706, the position of the screen can be changed, so that the clogged screen can be exposed for cleaning. At this time, the other cleaned screen enters the filtration position for filtration. In the entire filtration and cleaning process, the screen does not need to be removed from the screen structure 700 for cleaning, thus enabling continuous production without stopping the machine.

[0061] In this disclosure, the term "multiple" refers to two or more unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0062] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0063] In the description of this specification, the terms "this embodiment," "other embodiments," "specific embodiments," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] The above are merely preferred embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A horizontal plastic hook production line, characterized in that, Includes frame one, a plasticizing conveyor line mounted on frame one, and an extrusion die for receiving the material output from the plasticizing conveyor line; frame two, and a forming roller assembly mounted on frame two. The plasticizing conveyor line is equipped with an air-cooled cover in the plasticizing conveying section. The air-cooled cover is divided into multiple air-cooled chambers arranged sequentially along the length of the plasticizing conveying section by partitions. Each air-cooled chamber is equipped with a fan. The air-cooled chamber is provided with an air inlet end that is connected to the air outlet of the fan. The air-cooled chamber is also provided with a vent end. The forming roller assembly includes an extrusion roller, a die roller, a shaping roller, and a discharge roller arranged sequentially along the product's forward direction. The discharge port of the extrusion die is positioned downwards and above the gap between the extrusion roller and the die roller. The forming roller group includes at least one mold roller having an inner roller body and a sealing roller sleeve that is fitted onto the inner roller body. The inner roller body has a liquid inlet channel and a liquid outlet channel. After the sealing roller sleeve is fitted onto the inner roller body, a sealed cooling channel is formed between the sealing roller sleeve and the inner roller body along the length direction of the mold roller. The sealed cooling channel is connected to the liquid inlet channel and the liquid outlet channel, respectively. Coolant flows through the liquid inlet channel, the sealed cooling channel, and the liquid outlet channel.

2. The horizontal plastic hook production line according to claim 1, characterized in that, The plasticizing conveying section has an elongated barrel, inside which is a spiral conveying shaft driven to rotate by a servo motor. The elongated barrel is fitted with several heating coils. The spiral conveying shaft is a conical shaft, and the outer diameter of the conical shaft gradually increases from the front end to the rear end. Consequently, the gap between the spiral conveying shaft and the barrel gradually decreases from the front end to the rear end.

3. The horizontal plastic hook production line according to claim 1, characterized in that, The air-cooled housing is assembled from multiple shells in a front-to-back sequence. Each shell includes an upper shell and a lower shell that are symmetrically assembled vertically. The upper shell and the lower shell have inwardly extending splicing walls at least at the splicing points along their length to allow for the splicing of the upper shell and the lower shell. Both the upper shell and the lower shell have a front end wall and a rear end wall. The front end walls of the upper shell and the lower shell are spliced ​​vertically to form the front sealing wall of the shell, and the rear end walls of the upper shell and the lower shell are spliced ​​vertically to form the rear sealing wall of the shell.

4. The horizontal plastic hook production line according to claim 1, characterized in that, The air-cooled cavity is formed between the shell and the barrel. The air inlet is a mounting hole at the bottom of the lower shell for mounting the air outlet of the fan. The vent is located at the top of the upper shell and has a vent outlet. Preferably, the vent is an elongated vent hole on the top of the upper housing, and the elongated vent hole is provided with a vent cap along its length direction, and the vent cap forms openings at both ends in the length direction to allow gas to pass through.

5. The horizontal plastic hook production line according to claim 1, characterized in that, The extrusion die includes a left die and a right die connected together. One of the left die and the right die has an elongated notch along the length of the discharge port on the outer side wall near the lower end of the discharge port. The outer side wall near the lower end of the discharge port also has an elongated slot along the length of the discharge port above the elongated notch. Several adjusting screw holes are arranged along the length of the long slot on the lower wall. Part of the adjusting screw holes is on the upper wall between the elongated slot and the elongated notch, and another part is on the lower wall of the elongated notch. An adjusting rod is screwed into the adjusting screw holes to adjust the width of the discharge port.

6. The horizontal plastic hook production line according to claim 5, characterized in that, The elongated notch has a concave arc bottom, and the distance between the upper and lower walls of the elongated notch gradually increases; the elongated groove is an elongated right-angled groove, and the lower wall of the elongated right-angled groove is basically parallel to the elongated notch.

7. The horizontal plastic hook production line according to claim 1, characterized in that, One end of the inner roller body has a stepped blind hole extending from its 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 tip 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 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 sealed 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.

8. The horizontal plastic hook production line according to claim 7, characterized in that, The spiral grooves are provided on the outer side wall of the inner roller body in multiple ways, each of which has a liquid inlet connection hole and a liquid outlet connection hole.

9. The horizontal plastic hook production line according to claim 7 or 8, characterized in that, The mold roller also includes a mold roller sleeve fitted onto a sealing roller sleeve, the mold roller sleeve including a mold sleeve for forming hooks and fur and fitted onto the sealing roller sleeve, and a fastening kit for tightly mounting the mold sleeve onto the sealing roller sleeve.

10. The horizontal plastic hook production line according to claim 9, characterized in that, The mold sleeve has a protruding limiting ring at one end. The fastening kit has two sets, located at both ends of the sealing roller sleeve. Each set includes a threaded fastening sleeve, a retaining sleeve, and a clamping sleeve. The outer peripheral sidewalls of both ends of the sealing roller sleeve are respectively provided with external threads. The threaded fastening sleeve is threadedly connected to the external threads to fasten to the end of the sealing roller sleeve. The retaining sleeve is sleeved on the sealing roller sleeve, and the clamping sleeve is sleeved on the mold sleeve. The retaining sleeve is clamped between the threaded fastening sleeve and the clamping sleeve. The inner sidewalls of the opposite ends of the retaining sleeve and the clamping sleeve are provided with radially outward recesses to form an annular receiving groove. The limiting ring is located in the annular receiving groove, and the end of the clamping sleeve clamps against the limiting ring.

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