Traction mechanism for multi-layer bar extruder

Abstract

The utility model provides a traction mechanism for a multi-layer bar extruder, which relates to the field of bar extruders and comprises a traction frame, at least one roller frame is arranged in the traction frame, tractors are respectively arranged above and below each roller frame, each roller frame comprises a frame body, at least two connecting shafts are arranged in the frame body, and the connecting shafts are connected with the traction frame. Each connecting shaft is sleeved with at least one conveying roller, and positioning grooves used for positioning bars are formed in the conveying rollers. Compared with the prior art, according to the traction mechanism for the multi-layer bar extruder, double-layer bars subjected to cooling forming enter the corresponding roller frames, the bottoms of the upper-layer bars are located in the positioning grooves in the corresponding rollers, and the tops of the lower-layer bars are located in the positioning grooves in the corresponding rollers; the upper traction machine and the lower traction machine synchronously stretch and move the extruded double-layer bar so as to ensure that the extruded double-layer bar keeps stable speed and shape in the extrusion process, the product quality is improved, the adaptability is high, and the production continuity is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of rod extruders, in particular to a traction mechanism for a multi-layer rod extruder. Background Art

[0002] When forming polymer material rods, they generally go through the steps of melting and plasticizing, extrusion, cooling and forming, and cutting. The cooled and formed rods need to be transferred to the corresponding station of the cutting mechanism for cutting, which is convenient for subsequent processing and transportation. The existing rod traction mechanism is generally only suitable for traction of single-layer rods, but not for traction of multi-layer rods. Utility Model Content

[0003] In view of the above problems, the utility model provides a traction mechanism for a multi-layer rod extruder, which stretches and moves the extruded multi-layer rod to ensure that it maintains a stable speed and shape during the extrusion process, improves product quality, has strong adaptability, and enhances production continuity.

[0004] The technical solution adopted by the utility model is:

[0005] A traction mechanism for a multi-layer rod extruder includes a traction frame, characterized in that at least one roller frame for placing and positioning upper layer rods and lower layer rods is arranged in the traction frame, and a traction machine for driving the rods to move is respectively arranged above and below each roller frame. The roller frame includes a frame body, at least two connecting shafts are arranged in the frame body, each connecting shaft is sleeved with at least two transmission rollers, and the transmission rollers are provided with positioning grooves for positioning the rods.

[0006] Preferably, the positioning groove is arranged on the side wall of the transmission roller, and the positioning groove includes a groove bottom surface and two groove side surfaces arranged on both sides of the groove bottom surface, and the two groove side surfaces are arranged obliquely.

[0007] Preferably, the frame body comprises two side plates arranged opposite to each other, each side plate is provided with at least one through hole, and both ends of the connecting shaft are inserted into the through holes of the two side plates.

[0008] More preferably, pads are installed at both ends of each connecting shaft, and the transmission roller is located between the two pads.

[0009] Preferably, the traction machine comprises a traction crawler in contact with the surface of the rod, a driving shaft and a driven shaft for driving the traction crawler, the traction crawler is sleeved on the driving shaft and the driven shaft, and the driving shaft is connected to a driver.

[0010] Preferably, the traction machine is arranged between two clamping plates, each clamping plate is provided with a first mounting seat matched with a support rod on the traction frame, and the traction machine is positioned on the support rod by a hydraulic system.

[0011] More preferably, at least one cylinder for adjusting the distance between the upper traction machine and the lower traction machine is further provided between the upper clamping plate and the lower clamping plate on the same side.

[0012] More preferably, each clamp is also provided with a second mounting seat, and the frame is provided with a third mounting seat corresponding to the second mounting seat, and the frame is installed between the upper tractor and the lower tractor by means of a screw passing through the second mounting seat, the third mounting seat on the lower tractor and the second mounting seat on the upper tractor.

[0013] Compared with the prior art, the utility model has the beneficial effect that: the utility model provides a traction mechanism for a multi-layer rod extruder, the double-layer rod that has been cooled and formed enters the corresponding roller frame, the bottom of the rod in the upper layer is in the positioning groove on the corresponding roller, and the top of the rod in the lower layer is in the positioning groove on the corresponding roller, and the traction machine at the top and the traction machine at the bottom synchronously stretch and move the extruded double-layer rod to ensure that it maintains a stable speed and shape during the extrusion process, improves product quality, has strong adaptability, and enhances production continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 , which is a schematic diagram of a traction mechanism for a multi-layer rod extruder provided by the utility model Figure 1 ;

[0015] Figure 2 , which is a schematic diagram of a traction mechanism for a multi-layer rod extruder provided by the utility model Figure 2 ;

[0016] Figure 3 , which is an exploded view of a traction mechanism for a multi-layer rod extruder provided by the utility model;

[0017] Figure 4 , which is an exploded view of a traction machine in a traction mechanism for a multi-layer rod extruder provided by the utility model;

[0018] Figure 5 , which is a schematic diagram of a transmission roller sleeved on a connecting shaft in a traction mechanism for a multi-layer rod extruder provided by the utility model;

[0019] Figure 6 , which is a schematic diagram of a transmission roller in a traction mechanism for a multi-layer rod extruder provided by the utility model;

[0020] Figure 7 , which is a schematic diagram of placing upper layer rods and lower layer rods on a roller frame in a traction mechanism for a multi-layer rod extruder provided by the utility model. DETAILED DESCRIPTION

[0021] The preferred implementation modes provided by the utility model are described in detail according to the accompanying drawings.

[0022] Figures 1 to 6 , which is a preferred embodiment of a traction mechanism for a multi-layer rod extruder provided by the utility model. Figures 1 to 6 As shown, the traction mechanism for the multi-layer rod extruder includes a traction frame 10, in which at least one roller frame 20 for placing and positioning the upper layer rod 100 and the lower layer rod 100 is arranged, and a traction machine 30 for driving the rod to move is respectively arranged above and below each roller frame 20, and the roller frame 20 includes a frame body 21, in which at least two connecting shafts 22 are arranged, and each connecting shaft 22 is sleeved with at least two transmission rollers 23, and the transmission rollers 23 are provided with positioning grooves 231 for positioning the rods; after cooling After the multi-layer rod of the type is transmitted, the multi-layer rod can be divided into a plurality of double-layer rods, and each double-layer rod enters the corresponding roller frame 20. The bottom of the rod in the upper layer is in the positioning groove 231 on the corresponding transmission roller 23, and the top of the rod in the lower layer is in the positioning groove 231 on the corresponding transmission roller 23. The upper tractor 30 and the lower tractor 30 synchronously stretch and move the double-layer rod after extrusion to ensure that it maintains a stable speed and shape during the extrusion process, improve product quality, have strong adaptability, and enhance production continuity. It is worth noting that the traction mechanism can be applied to the transmission of even-numbered layers of rods, and can also be applied to the transmission of odd-numbered layers of rods. The rod in a single layer enters the roller frame 21, and the upper tractor 30 or the lower tractor 30 is used to synchronously stretch and move the rod.

[0023] like Figure 3 As shown, the frame 21 includes two side plates 211 arranged opposite to each other, and at least one through hole 2111 is provided on the side plates 211. The two ends of the connecting shaft 22 are inserted into the through holes 2111 of the two side plates 211; the connecting shaft 22 rotates relative to the through holes 2111. Pads 24 are also installed at both ends of each connecting shaft 22, and the transmission roller 23 is located between the two pads 24 to prevent the transmission roller 23 from moving to the end of the connecting shaft 22 and falling off, and to prevent the transmission roller 23 from sticking to the side plates 211.

[0024] The positioning groove 231 is arranged on the side wall of the transmission roller 23, including a groove bottom surface 2311 and two groove side surfaces 2312 arranged on both sides of the groove bottom surface. The two groove side surfaces 2312 are arranged at an angle, so that the cross-section of the entire positioning groove 231 is an inverted trapezoid, similar to a V-shape, which can be suitable for rods of different diameters to position the rods.

[0025] The number of transmission rollers 23 on the connecting shaft 22 is set as needed, and the upper layer of rods 100 is staggered with the lower layer of rods 100. The upper layer of rods and the lower layer of rods correspond to different transmission rollers 23, so that the upper tractor 30 and the lower tractor 30 can stretch and move the extruded double-layer rods synchronously. Figure 5 and Figure 7 In the figure, 9 transmission rollers 23 are arranged on the connecting shaft 22, 4 of which correspond to the 4 rods 100 of the upper layer, and 5 of which correspond to the 5 rods 100 of the lower layer. The rods 100 of the upper layer are staggered with the rods 100 of the lower layer.

[0026] The traction machine 30 includes a traction crawler 31 that fits the surface of the rod, a driving shaft 32 and a driven shaft 33 for driving the traction crawler. The traction crawler 31 is sleeved on the driving shaft 32 and the driven shaft 33, and the driving shaft is connected to a driver 34. The traction crawler 31 is usually made of wear-resistant rubber or other elastic materials to ensure that it provides sufficient friction and traction when it contacts the surface of the rod, while reducing damage to the surface of the rod. The surface of the traction crawler 31 can be provided with textures to increase the contact area with the extruded rod and improve the traction effect. The driver 34 is an electric motor or other appropriate power device. The driver 34 transmits power to the traction crawler 31 through the driving shaft 32 and the driven shaft 33, so as to drive the traction crawler 31 to rotate; when the driver 34 drives the traction crawler 31 to start rotating, the surface of the traction crawler 31 generates sufficient friction to drive the rod to move along the extrusion direction while contacting the rod. The design and friction of the traction crawler 31 ensure that the rod will not slip or lose control during the traction process, and maintain a stable extrusion speed and shape.

[0027] The tractor 30 is arranged between two clamping plates 40, and each clamping plate 40 is provided with a first mounting seat 41 that cooperates with the support rod 11 on the traction frame 10. The tractor 30 between the two clamping plates can be positioned on the support rod 11 by a hydraulic system. At least one cylinder for adjusting the distance between the upper tractor and the lower tractor is also provided between the upper clamping plate 40 and the lower clamping plate 40 on the same side. The cylinder can be used to adjust the distance between the upper tractor 30 and the lower tractor 30 to adapt to rods of different sizes, ensuring that the traction crawlers 31 on the upper tractor 30 and the lower tractor 30 can contact the surface of the rod on the frame 21.

[0028] Each clamp 40 is also provided with a second mounting seat 42, and the frame 21 is provided with a third mounting seat 212 corresponding to the second mounting seat 42. The frame 21 is installed between the upper tractor 30 and the lower tractor 30 by means of a screw passing through the second mounting seat 42 on the lower tractor, the third mounting seat 212 and the second mounting seat 42 on the upper tractor.

[0029] As a preferred embodiment, Figure 1 and Figure 2 As shown, the traction frame 10 includes four support rods 11, each clamp plate 40 is provided with two first mounting seats 41 and two second mounting seats 42, and each side plate 211 of the frame body 21 is provided with two third mounting seats 212, so that the four first mounting seats 41 on the clamp plates 40 on both sides of each tractor 30 are respectively matched with the four support rods 11, and the tractor 30 is supported by a hydraulic system; the frame body 21 is installed between the upper tractor 20 and the lower tractor 30 through four screws and the second mounting seats 42 and the third mounting seats 212, ensuring that the traction crawlers on the upper tractor 30 and the lower tractor 30 can contact the surface of the rod on the frame body 21.

[0030] In summary, the technical solution of the utility model can fully and effectively achieve the above-mentioned utility model purpose, and the structure and functional principle of the utility model have been fully verified in the embodiments, and can achieve the expected effect and purpose. Without departing from the principle and essence of the utility model, various changes or modifications can be made to the embodiments of the utility model. Therefore, the utility model includes all replacement contents within the scope mentioned in the scope of the patent application, and any equivalent changes made within the scope of the patent application of the utility model are within the scope of the patent application of this case.

Claims

1. A traction mechanism for a multi-layer rod extruder, comprising a traction frame, characterized in that: At least one roller frame for placing and positioning upper and lower rods is arranged in the traction frame, and a traction machine for driving the rods to move is respectively arranged above and below each roller frame. The roller frame includes a frame body, and at least two connecting shafts are arranged in the frame body. At least two transmission rollers are sleeved on each connecting shaft, and the transmission rollers are provided with positioning grooves for positioning the rods.

2. The traction mechanism for a multi-layer rod extruder according to claim 1, characterized in that: The positioning groove is arranged on the side wall of the transmission roller, and the positioning groove comprises a groove bottom surface and two groove side surfaces arranged on both sides of the groove bottom surface, and the two groove side surfaces are arranged in an inclined manner.

3. The traction mechanism for a multi-layer rod extruder according to claim 1, characterized in that: The frame body comprises two side plates arranged opposite to each other, each side plate is provided with at least one through hole, and two ends of the connecting shaft are inserted into the through holes of the two side plates.

4. The traction mechanism for a multi-layer rod extruder according to claim 1, characterized in that: Pads are also installed at both ends of each connecting shaft, and the transmission roller is located between the two pads.

5. The traction mechanism for a multi-layer rod extruder according to claim 1, characterized in that: The traction machine comprises a traction crawler which is in contact with the surface of the rod, a driving shaft and a driven shaft for driving the traction crawler, the traction crawler is sleeved on the driving shaft and the driven shaft, and the driving shaft is connected with a driver.

6. The traction mechanism for a multi-layer rod extruder according to claim 1, characterized in that: The traction machine is arranged between two clamping plates, each clamping plate is provided with a first mounting seat matched with a support rod on the traction frame, and the traction machine is positioned on the support rod by using a hydraulic system.

7. The traction mechanism for a multi-layer rod extruder according to claim 6, characterized in that: At least one cylinder for adjusting the distance between the upper traction machine and the lower traction machine is also provided between the upper clamping plate and the lower clamping plate on the same side.

8. The traction mechanism for a multi-layer rod extruder according to claim 6, characterized in that: Each clamping plate is also provided with a second mounting seat, and the frame is provided with a third mounting seat corresponding to the second mounting seat. The frame is installed between the upper tractor and the lower tractor by means of a screw passing through the second mounting seat, the third mounting seat on the lower tractor and the second mounting seat on the upper tractor.

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