Head raising device for plastic blow molding extruder

Abstract

The utility model discloses a head lifting device for a plastic blow molding extruder, and belongs to the technical field of plastic blow molding equipment. Comprising a base, an eccentric shaft rotationally arranged on the base, a motor for driving the eccentric shaft to rotate, a connecting base rotationally arranged on the eccentric shaft in a sleeving mode, and a supporting platform hinged to the upper end of the connecting base, wherein the length of the connecting base is equal to that of the eccentric shaft; a pair of hinged lugs are formed downwards at the positions, corresponding to the two cantilevers, of the supporting platform respectively, and the cantilevers are arranged between the corresponding pair of hinged lugs respectively and hinged through hinged shafts respectively. The head raising device has the advantages that stress is uniform, larger weight can be borne, the working stability of the head raising device is greatly improved, the service life of the head raising device is prolonged, and the head raising action can be carried out on multiple large-weight machine heads at the same time.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic blow molding equipment, and in particular relates to a head raising device for a plastic blow molding extruder. Background Art

[0002] During the plastic blow molding process, the blank needs to be cut by a cutter after it is extruded from the blank die head into the mold. However, the blank is still in a flowing state at this time, so it is very easy for the blank to stick at the cutting position. Therefore, a lifting device is usually required at the head position of the blank die head. The lifting device can lift the head while cutting so that the blank can be separated.

[0003] The current head-lifting devices mainly include a screw lifting structure, a crankshaft-connecting rod matching structure, a cam rotating lifting structure, etc. Among them, the screw lifting structure has a slow lifting speed and low production efficiency, and cannot meet the actual production needs; and the crankshaft-connecting rod matching structure and the cam rotating lifting structure will gradually become unsuitable as the weight of the machine head in the existing device increases. In particular, with the acceleration of the modernization process and the rapid economic development, the degree of automation and multi-station is increasing year by year. It is difficult to support the exponentially increased weight of the machine head due to the limitations of the connecting rod and the cam, which greatly reduces the stability of the head-lifting device. In addition, the cam also has the problem of severe wear, which affects its service life.

[0004] In the existing technology, such as the "eccentric wheel type lifting device for blow molding machine" disclosed in China Utility Model Patent Authorization Announcement No. CN208645999U, and the "electrically driven lifting power device" involved in China Utility Model Patent Authorization Announcement No. CN212795848U, both have the above-mentioned many disadvantages and can no longer meet the production needs of manufacturers.

[0005] In view of the above problems, it is necessary to design a head-raising device for a plastic blow molding extruder with simple structure, good stability and long service life, which can support a heavy weight. For this reason, the applicant has cleverly designed this technical solution. Utility Model Content

[0006] The task of the utility model is to provide a lifting device for a plastic blow molding extruder, which helps to improve the supporting structure to improve the working stability of the lifting device and extend the service life, and is conducive to the lifting device being able to lift multiple heavy heads at the same time.

[0007] The task of the utility model is accomplished in this way. A head-raising device for a plastic blow molding extruder includes a base, an eccentric shaft rotatably arranged on the base, a motor for driving the eccentric shaft to rotate, a connecting seat rotatably sleeved on the eccentric shaft and having a length equivalent to the eccentric shaft, and a supporting platform hinged to the upper end of the connecting seat, a pair of cantilevers are respectively extended upward at intervals above the connecting seat, and a pair of hinged ears are respectively formed downward at positions corresponding to the two cantilevers, and the cantilevers are respectively arranged between the corresponding pair of hinged ears and are respectively hinged by a hinge shaft.

[0008] In a specific embodiment of the present utility model, the two sides of the base are respectively formed with a left wall panel and a right wall panel, the eccentric shaft is formed with a left eccentric shaft head rotatably supported on the left wall panel on the side facing the left wall panel, and a bearing I is arranged between the left eccentric shaft head and the left wall panel; the eccentric shaft is formed with a right eccentric shaft head rotatably supported on the right wall panel on the side facing the right wall panel, and a bearing II is arranged between the right eccentric shaft head and the right wall panel; the motor is fixedly connected to the right wall panel through a reduction gear box, and an output shaft is formed in the reduction gear box, which passes through the right wall panel and is transmission-connected to the right eccentric shaft head, the reduction gear box is fixedly installed with the right wall panel by fasteners around it, and the motor is installed on the reduction gear box and transmission-connected to the reduction gear box and drives the output shaft to rotate.

[0009] In another specific embodiment of the present invention, the shaft head of the left eccentric shaft and the shaft head of the right eccentric shaft are on the same axis, and the middle eccentric shaft is eccentrically arranged between the shaft heads of the left eccentric shaft and the shaft heads of the right eccentric shaft.

[0010] In another specific embodiment of the present invention, a cover plate is provided on the outer side of the left wall plate and at a position corresponding to the bearing I, and the cover plate is fixedly mounted to the left wall plate.

[0011] In another specific embodiment of the utility model, a lubricating bearing I is respectively provided between the outer periphery of the eccentric shaft and the connecting seat and at the two end portions, and a washer is provided between the outer periphery of the eccentric shaft and the connecting seat and between the two lubricating bearings I, and the outer diameter of the washer is smaller than the outer diameter of the lubricating bearing I.

[0012] In another specific embodiment of the present utility model, the lubricating bearing I is a solid inlaid bearing.

[0013] In a further specific embodiment of the present invention, a lubricating bearing II is respectively arranged between the outer periphery of the articulated shaft and the cantilever, the articulated shaft and the corresponding articulated ear are tightly fitted, one end of the articulated shaft extends out of the support platform and forms an articulated shaft flange edge at the end, and the articulated shaft flange edge is fixed to the support platform by a group of articulated shaft screws.

[0014] In a further specific embodiment of the present utility model, the lubricating bearing II is a solid inlaid bearing.

[0015] After the utility model adopts the above structure, it has the beneficial effect: since the eccentric shaft is used to drive the connecting seat of equivalent length to perform lifting movement, and then drives the supporting platform to realize the lifting action, the force between the eccentric shaft and the connecting seat in the device is uniform, and it can bear a larger weight, which greatly improves the working stability of the lifting device and extends its service life, which is conducive to the lifting device to realize the lifting operation of multiple heavy heads at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front structural schematic diagram of an embodiment of the utility model;

[0017] Figure 2 It is a side structural schematic diagram of an embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the top structure of an embodiment of the utility model.

[0019] In the figure: 1. base, 11. left wall panel, 12. right wall panel, 13. cover plate, 131. cover plate screw; 2. eccentric shaft, 21. left eccentric shaft shaft head, 211. bearing Ⅰ, 22. right eccentric shaft shaft head, 221. bearing Ⅱ, 23. lubricated bearing Ⅰ, 24. washer; 3. motor, 31. reduction box, 311. output shaft, 312. reduction box screw; 4. connecting seat, 41. cantilever; 5. support platform, 51. articulated ear; 6. articulated shaft, 61. articulated shaft flange, 611. articulated shaft screw, 62. lubricated bearing Ⅱ. DETAILED DESCRIPTION

[0020] The specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings, but the description of the embodiments is not a limitation of the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as the protection scope of the present invention.

[0021] In the following description, all concepts related to up, down, left, right, front and back directions or orientations are based on Figure 1 The positions shown are for reference only and thus cannot be understood as a special limitation on the technical solution provided by the present utility model.

[0022] See also Figure 1 , Figure 2 and Figure 3 , illustrates a head-raising device for a plastic blow molding extruder, comprising a base 1, an eccentric shaft 2 rotatably arranged on the base 1, a motor 3 for driving the eccentric shaft 2 to rotate, a connecting seat 4 rotatably sleeved on the eccentric shaft 2 and having a length equivalent to that of the eccentric shaft 2, and a supporting platform 5 hinged to the upper end of the connecting seat 4, a pair of cantilevers 41 extending upwardly at intervals above the connecting seat 4, a pair of hinged ears 51 are respectively formed downwardly on the supporting platform 5 at positions corresponding to the two cantilevers 41, and the cantilevers 41 are respectively arranged between the corresponding pair of hinged ears 51 and are respectively hinged by a hinge shaft 6.

[0023] A left wall panel 11 and a right wall panel 12 are respectively formed on both sides of the aforementioned base 1. The aforementioned eccentric shaft 2 is formed with a left eccentric shaft head 21 rotatably supported on the left wall panel 11 on the side facing the left wall panel 11, and a bearing I211 is arranged between the aforementioned left eccentric shaft head 21 and the left wall panel 11; the aforementioned eccentric shaft 2 is formed with a right eccentric shaft head 22 rotatably supported on the right wall panel 12 on the side facing the right wall panel 12, and a bearing II221 is arranged between the aforementioned right eccentric shaft head 22 and the right wall panel 12; the aforementioned motor 3 is fixedly connected to the right wall panel 12 through a reduction box 31, and an output shaft 311 is formed in the aforementioned reduction box 31 that passes through the right wall panel 12 and is transmission-connected to the right eccentric shaft head 22. The aforementioned reduction box 31 is fixedly installed with the aforementioned right wall panel 12 through a group of reduction box screws 312 around it, and the aforementioned motor 3 is installed on the reduction box 31 and transmission-connected to the reduction box 31 and drives the aforementioned output shaft 311 to rotate.

[0024] The left eccentric shaft head 21 and the right eccentric shaft head 22 are on the same axis, and the middle eccentric shaft 2 is eccentrically arranged between the left eccentric shaft head 21 and the right eccentric shaft head 22. A cover plate 13 is arranged on the outer side of the left wall plate 11 and at the position corresponding to the bearing I 211. The cover plate 13 is fixedly mounted to the left wall plate 11 by a set of cover plate screws 131.

[0025] A lubricating bearing Ⅰ23 is respectively provided between the outer periphery of the eccentric shaft 2 and the connecting seat 4 and at the positions of both ends, and a washer 24 is provided between the outer periphery of the eccentric shaft 2 and the connecting seat 4 and between the two lubricating bearings Ⅰ23. The outer diameter of the washer 24 is smaller than the outer diameter of the lubricating bearing Ⅰ23. In this embodiment, the lubricating bearing Ⅰ23 is a solid inlaid bearing.

[0026] A lubricating bearing II 62 is respectively arranged between the outer periphery of the aforementioned articulated shaft 6 and the cantilever 41, and the aforementioned articulated shaft 6 is tightly matched with the corresponding articulated ear 51. One end of the aforementioned articulated shaft 6 extends out of the support platform 5 and forms an articulated shaft flange 61 at the end. The aforementioned articulated shaft flange 61 is respectively fixedly installed with the support platform 5 through a set of articulated shaft screws 611. In this embodiment, the aforementioned lubricating bearing II 62 is a solid inlaid bearing.

[0027] See also Figure 1 , Figure 2 and Figure 3 First, the aforementioned base 1 is fixedly installed under the heavy-weight multi-head of the extruder through fasteners, and then the aforementioned support platform 5 is fixedly connected to the bracket of the heavy-weight multi-head above. When the embryo needs to be cut, the aforementioned motor 3 is driven to work, and the aforementioned motor 3 drives the reduction box 31 and the output shaft 311 to rotate, and the aforementioned output shaft 311 drives the eccentric shaft 2 to rotate around the left eccentric shaft head 21 and the right eccentric shaft head 22. The aforementioned eccentric shaft 2 relies on the eccentric setting to push the connecting seat 4 to lift during the process of rotating 180°. The aforementioned connecting seat 4 pushes the hinge ear 51 and the support platform 5 through the hinge shaft 6 to complete the lifting action. When the aforementioned eccentric shaft 2 rotates more than 180°, the eccentric shaft 2 drives the connecting seat 4 to move downward until the eccentric shaft 2 rotates 360° to complete the reset action of the support platform 5 and the extruder head. When the next group of embryos needs to be cut, the above work is repeated, and it is circulated back and forth in sequence.

Claims

1. A head-raising device for a plastic blow molding extruder, characterized in that: The invention comprises a base (1), an eccentric shaft (2) rotatably arranged on the base (1), a motor (3) driving the eccentric shaft (2) to rotate, a connecting seat (4) rotatably sleeved on the eccentric shaft (2) and having a length equivalent to that of the eccentric shaft (2), and a supporting platform (5) hinged to the upper end of the connecting seat (4), wherein a pair of cantilevers (41) are respectively extended upwardly at intervals above the connecting seat (4), and the supporting platform (5) is respectively formed with a pair of hinged ears (51) at positions corresponding to the two cantilevers (41), and the cantilevers (41) are respectively arranged between the corresponding pair of hinged ears (51) and are respectively hinged by a hinge shaft (6).

2. The head raising device for a plastic blow molding extruder according to claim 1, characterized in that: The base (1) is provided with a left wall panel (11) and a right wall panel (12) on both sides respectively; the eccentric shaft (2) is provided with a left eccentric shaft head (21) rotatably supported on the left wall panel (11) on the side facing the left wall panel (11); a bearing I (211) is provided between the left eccentric shaft head (21) and the left wall panel (11); the eccentric shaft (2) is provided with a right eccentric shaft head (22) rotatably supported on the right wall panel (12) on the side facing the right wall panel (12); the right eccentric shaft head (22) is provided with a bearing I (211) A bearing II (221) is arranged between the right wall panel (12); the motor (3) is fixedly connected to the right wall panel (12) through a reduction box (31); an output shaft (311) is formed in the reduction box (31) and passes through the right wall panel (12) and is transmission-connected to the shaft head (22) of the right eccentric shaft; the reduction box (31) is fixedly mounted to the right wall panel (12) through fasteners; the motor (3) is mounted on the reduction box (31) and is transmission-connected to the reduction box (31) and drives the output shaft (311) to rotate.

3. The head raising device for a plastic blow molding extruder according to claim 2, characterized in that: The left eccentric shaft head (21) and the right eccentric shaft head (22) are on the same axis, and the middle eccentric shaft (2) is eccentrically arranged with respect to the left eccentric shaft head (21) and the right eccentric shaft head (22).

4. The head raising device for a plastic blow molding extruder according to claim 2, characterized in that: A cover plate (13) is arranged on the outer side of the left wall plate (11) and at a position corresponding to the bearing I (211), and the cover plate (13) is fixedly mounted on the left wall plate (11).

5. The head raising device for a plastic blow molding extruder according to claim 1, characterized in that: A lubricating bearing I (23) is provided between the outer periphery of the eccentric shaft (2) and the connecting seat (4) and at the positions of both ends, and a washer (24) is provided between the outer periphery of the eccentric shaft (2) and the connecting seat (4) and between the two lubricating bearings I (23), wherein the outer diameter of the washer (24) is smaller than the outer diameter of the lubricating bearing I (23).

6. The head raising device for a plastic blow molding extruder according to claim 5, characterized in that: The lubricating bearing I (23) is a solid inlaid bearing.

7. The head raising device for a plastic blow molding extruder according to claim 1, characterized in that: A lubricating bearing II (62) is respectively arranged between the outer periphery of the articulated shaft (6) and the cantilever (41); the articulated shaft (6) and the corresponding articulated ear (51) are tightly matched; one end of the articulated shaft (6) extends out of the support platform (5) and forms an articulated shaft flange edge (61) at the end; the articulated shaft flange edge (61) is fixedly mounted on the support platform (5) by a group of articulated shaft screws (611).

8. The head raising device for a plastic blow molding extruder according to claim 7, characterized in that: The lubricating bearing II (62) is a solid inlaid bearing.

Images