Four-station hollow blow molding equipment

Abstract

The utility model discloses four-station hollow blow molding equipment which comprises an extrusion system, a blow molding system and a blow molding system, the four forming mechanisms are arranged in front of the extruding machine head, and the four forming mechanisms are arranged in two rows in the longitudinal direction and arranged in two columns in the transverse direction; the online deflashing mechanism is positioned in front of each forming mechanism; the displacement mechanism comprises a pair of longitudinal sliding rails extending in the longitudinal direction, two pairs of longitudinal sliding tables capable of being matched with the pair of longitudinal sliding rails in a sliding mode respectively, a pair of transverse sliding rails with the two ends connected to the longitudinal sliding tables respectively, a first transverse sliding table and a second transverse sliding table, and the first transverse sliding table and the second transverse sliding table can be matched with the pair of transverse sliding rails in a sliding mode respectively. A material blank mechanical arm is arranged on the first transverse sliding table in a lifting mode, a product mechanical arm is arranged on the second transverse sliding table in a lifting mode, the material blank mechanical arm is provided with a first clamping jaw used for grabbing material blanks, and the product mechanical arm is provided with a second clamping jaw used for grabbing blow molding products.

Description

Technical Field

[0001] This application relates to the field of plastic molding technology, and in particular to a four-station hollow blow molding equipment. Background Technology

[0002] A blow molding machine extrudes molten raw materials through a screw extruder to form a preform. The preform is then fed into the split mold of the blow molding machine. After the mold is closed, compressed air is introduced into the bottom to expand the material and form it tightly against the inner wall of the mold. The material is then cooled by an air ring, and the product is produced.

[0003] Existing blow molding equipment requires moving the molding mechanism directly below the blow extruder head. The extruder then conveys the hot, soft plastic preform to the molding die. The die is then moved away from the extruder head for blow molding to form a partially formed plastic product with residual heat. This type of blow molding equipment suffers from heavy movement, slow speed, and low processing efficiency. The market demands a more efficient blow molding system. Summary of the Invention

[0004] The purpose of this application is to solve the problem of low processing efficiency of existing hollow blow molding equipment and to provide a four-station hollow blow molding equipment.

[0005] To achieve the above objectives, this application adopts the following technical solution: a four-station hollow blow molding machine, comprising:

[0006] An extrusion system, the extrusion system comprising an extruder and an extruder head;

[0007] Four forming mechanisms are arranged in front of the extruder head, and the four forming mechanisms are arranged in two rows along the longitudinal direction and in two columns along the transverse direction.

[0008] An online deflashing mechanism is located in front of each of the aforementioned forming mechanisms; and,

[0009] The displacement mechanism includes a pair of longitudinally extending slide rails, two pairs of longitudinal slide tables slidably fitted on the pair of longitudinal slide rails, a pair of transverse slide rails with their ends connected to the longitudinal slide tables, a first transverse slide table and a second transverse slide table slidably fitted on the pair of transverse slide rails, a blank manipulator is movably mounted on the first transverse slide table, and a product manipulator is movably mounted on the second transverse slide table. The blank manipulator has a first gripper for gripping the blank, and the product manipulator has a second gripper for gripping the blow-molded product.

[0010] In one embodiment, the displacement mechanism includes a pair of longitudinally extending beams, on which a longitudinal rack and a longitudinal slide rail are mounted. A first motor and a first gear coaxially rotatably connected to the first motor are mounted on each of the longitudinal slides, and the first gear meshes with the longitudinal rack for transmission.

[0011] In one embodiment, the displacement mechanism further includes a pair of crossbeams, with each crossbeam having two ends fixedly connected to the longitudinal slides on both sides.

[0012] In one embodiment, two longitudinal slides are connected to the same crossbeam. One slide is equipped with a second motor and a drive wheel that is driven by the second motor, and the other slide is equipped with a driven wheel. The crossbeam is hollow inside. A synchronous belt is tensioned between the drive wheel and the driven wheel. The first or second transverse slide is fixedly connected to the synchronous belt on one side.

[0013] In one embodiment, the first gripper has a pair of gripping arms, the pair of gripping arms extending rearward by a greater distance than extending forward.

[0014] In one embodiment, at least one of the clamping arms has a toothed structure on its inner edge.

[0015] In one embodiment, the pair of said clamping arms have a liner made of polytetrafluoroethylene material.

[0016] In one embodiment, the product manipulator has a second vertical track extending in a vertical direction, a rotary cylinder disposed at the lower end of the second vertical track, the rotary cylinder having a rotary output shaft, and the second gripper being fixedly mounted on the rotary output shaft.

[0017] This application achieves rapid gripping and movement of blanks or products between the extruder head, the four molding stations, and the online deflashing mechanism through a reasonable arrangement of four molding stations and a displacement mechanism. This can reduce the energy consumption of blow molding equipment and improve processing efficiency. Attached Figure Description

[0018] Figure 1 A top view of a four-station hollow blow molding equipment provided in one embodiment of this application;

[0019] Figure 2 A perspective view of a displacement mechanism provided for one embodiment of this application;

[0020] Figure 3 for Figure 2 Enlarged view of section A in the image;

[0021] Figure 4 for Figure 2 Enlarged view of section B in the image;

[0022] Figure 5 A schematic diagram of the structure of a crossbeam provided in one embodiment of this application;

[0023] Figure 6 A side view of a blank-making robot provided for one embodiment of this application;

[0024] Figure 7 A front view of the clamping arm provided for one embodiment of this application;

[0025] Figure 8 A side view of an article robot provided for one embodiment of this application.

[0026] Among them, 10, longitudinal beam; 11, longitudinal rack; 12, longitudinal slide rail; 20, crossbeam; 21, longitudinal sliding table; 22, first motor; 23, first gear; 25, transverse slide rail; 26, second motor; 27, limiting component; 28, synchronous belt; 29, driven wheel; 30, blank manipulator; 31, first gripper; 32, first vertical track; 33, first transverse sliding table; 310, gripper arm; 40, product manipulator; 41, second gripper; 42, second vertical track; 43, second transverse sliding table; 44, rotary cylinder; 45, vertical rack; 46, third motor; 50, extruder; 51, hopper; 52, extruder head; 53, blow molded product. Detailed Implementation

[0027] To explain in detail the technical content, structural features, achieved objectives, and effects of this utility model, the technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. In the following description, for illustrative purposes, numerous specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of this utility model. However, various exemplary embodiments may also be implemented without these specific details or in one or more equivalent arrangements. Furthermore, the various exemplary embodiments may differ, but are not necessarily exclusive. For example, the specific shape, construction, and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0028] In the following description, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0029] In this application, unless otherwise expressly specified and limited, the term "connection" shall be interpreted broadly. For example, "connection" may be a fixed connection, a detachable connection, or an integral part; it may be a direct connection or an indirect connection through an intermediate medium.

[0030] See Figure 1 As shown in the embodiments of this application, a hollow blow molding machine with four stations is provided, comprising:

[0031] The extrusion system includes an extruder 50, a hopper 51, and an extruder head 52. A cutter and an air blowing system are installed below the extruder head 52. The extruder 50 extrudes molten material through the extruder head 52. After the preform robot 30 grasps the preform, the air blowing system blows air into the preform to prevent adhesion to the tube wall. Then, the cutter cuts the continuous preform, and the robot grasps the upper part of the cut preform and moves it forward.

[0032] Four forming mechanisms A, B, C, and D are located in front of the extruder head 52. After the preform is fed into the forming mechanism, it will be blow-molded and shaped to form a hollow blow-molded product. Since the blow molding process includes actions such as mold closing, mold locking, and blow molding, the operation time is relatively long. In order to maximize the efficiency matching between blow molding and extrusion, this application adopts four forming mechanisms. After the robot feeds the preform into one forming mechanism, it can return to the extruder head to grab the next preform during the mold closing waiting time.

[0033] The four forming mechanisms are arranged in two rows longitudinally and two columns transversely. This arrangement, combined with the displacement mechanism, allows for the loading and unloading of blanks and finished products using the shortest route and the most convenient displacement mechanism. Correspondingly, the displacement mechanism is equipped with a longitudinal beam 10 extending longitudinally and crossing the extruder head to the online deflashing mechanism, and a transverse beam 20 perpendicular to the longitudinal beam 10. The robot arm can move longitudinally and transversely to complete actions such as loading and unloading blanks and finished products in multiple forming mechanisms.

[0034] The online deflash removal mechanism P, located in front of the molding mechanism, can remove excess waste material from blow-molded products.

[0035] The displacement mechanism is mounted above the four forming mechanisms A, B, C, D and the online deflashing mechanism P. It is used to grab the extruded blanks from the extruder head 52 and feed them into each forming mechanism, and to remove the blow-molded products from each forming mechanism and feed them into the online deflashing mechanism.

[0036] See Figure 2 , 34. The displacement mechanism includes a pair of longitudinal beams 10 extending longitudinally and a pair of transverse beams 20 extending laterally. A longitudinal rack 11 and a longitudinal slide rail 12 are mounted on the longitudinal beams 10. A longitudinal slide table 21 is slidably connected to the longitudinal slide rail 12. Both ends of each crossbeam 20 are fixedly connected to a pair of longitudinal slide tables 21. A first motor 22 and a first gear 23 coaxially rotatably connected to the first motor 22 are mounted on each longitudinal slide table 21. The first gear 23 meshes with the longitudinal rack 11, thereby causing the first motor 22 to drive the longitudinal slide table to slide longitudinally.

[0037] See Figure 3 , 4 5. The crossbeam 20 has a transverse slide rail 25 extending laterally, and a first transverse sliding platform 33 and a second transverse sliding platform 43 slidably connected to the transverse slide rail 25. The two ends of each crossbeam 20 are fixedly connected to the longitudinal sliding platforms 21 on both sides, and the two longitudinal sliding platforms 21 connected to the same crossbeam 20 are also connected. One longitudinal sliding platform 21 has a second motor 26 and a drive wheel (not shown in the figure) connected to the second motor 26 for transmission, while the other longitudinal sliding platform 21 has a driven wheel 29. The interior of the crossbeam 20 is hollow, and a synchronous belt 28 is tensioned between the drive wheel and the driven wheel 29. The first transverse sliding platform 33 or the second transverse sliding platform 43 is fixedly connected to the synchronous belt 28 on one side. Therefore, when the second motor 26 starts, it can drive the first transverse sliding platform 33 or the second transverse sliding platform 43 to move along the transverse slide rail 25.

[0038] Please continue reading. Figure 2 The crossbeam 20 has two beams. The crossbeam 20 near the extruder 50 is used to install the blank robot 30, and the crossbeam 20 near the online deflashing mechanism is used to install the product robot 40. Therefore, the first transverse sliding table 33 is slidably connected to the transverse slide rail of the rear crossbeam, and the second transverse sliding table 43 is slidably connected to the transverse slide rail of the front crossbeam. The blank robot 30 is raised and lowered on the first transverse sliding table 33, and the product robot 40 is raised and lowered on the second transverse sliding table 43.

[0039] See Figure 6 , 7As shown, the preform robot 30 has a first gripper 31 for grasping the preform. The first gripper 31 has a pair of gripping arms 310, which extend rearward by a greater distance than forward, so that when the preform robot 30 approaches the extruder head 52, the pair of gripping arms 310 can reach below the extruder head 52 to grasp the preform. To prevent the side walls of the preform tube from sticking together when the gripping arms 310 grasp the preform, the preform tube is also blown and cut during the process. This application also designs a toothed structure with concave and convex edges on the inner edge of one of the gripping arms. This prevents the side walls of the tube at the corresponding gripping point from completely sticking together after the pair of gripping arms 310 hold the preform, which is beneficial for blowing and shaping the preform in the molding mechanism. In addition, to reduce the adhesion between the preform and the gripping arms, this application also provides a liner on the inner surface of the pair of gripping arms. The liner is made of polytetrafluoroethylene material.

[0040] See Figure 8 As shown, the product manipulator 40 has a second vertical track 42 extending vertically, a vertical rack 45 parallel to the second vertical track 42, a rotary cylinder 44 located at the lower end of the second vertical track 42, and a second gripper 41 for gripping blow-molded products. A third motor 46 and a gear meshing with the vertical rack 45 are also provided on the second transverse sliding table 43. The third motor 46 drives the gear to rotate, thereby causing the product manipulator 40 to rise and fall vertically, thus adjusting the height of the second gripper 41. The blank manipulator 30 also uses the same rack and pinion transmission method to achieve the raising and lowering of the first gripper.

[0041] The front of the product robot 40 is an online deflashing mechanism. Therefore, after the product robot 40 removes the blow-molded product from the molding mechanism, it needs to be horizontally flipped before being fed into the online deflashing mechanism. Therefore, a rotary cylinder 44 is located at the lower end of the second vertical track 42, and the rotary cylinder 44 has a rotary output shaft, on which the second gripper 41 is fixedly mounted.

[0042] Please continue to refer to this. Figure 1 The extrusion system, forming mechanism, displacement mechanism, and online deflashing mechanism of the blow molding equipment of this application are arranged symmetrically along the central axis from back to front, while the four forming mechanisms are arranged in a rectangular shape. The extruder is responsible for extruding plastic preforms O of appropriate length and weight. The four forming mechanisms are respectively equipped with forming molds (A, B, C, and D). The forming mechanisms open and close in fixed positions to perform actions that meet the process requirements. The displacement mechanism can operate in a three-axis space. The online deflashing mechanism P is responsible for de-flaking the blow-molded product containing flash to form the final finished product. The online deflashing mechanism is equipped with an output device to output the final finished product to the subsequent station.

[0043] During operation, the extrusion system extrudes a plastic preform of suitable length and weight. The preform robot in the displacement mechanism moves the preform 0 along the X, Y, and Z axes and places it into any of the forming molds (A, B, C, or D) in the molding mechanism. It then blow-molds the preform into a predetermined shape, forming a plastic product with residual heat and flash. The product removal fixture in the displacement mechanism then removes the flash-containing product from the A, B, C, or D mold cavities and places it into the online flash removal mechanism P. At this station, flash removal is performed to form the final finished product.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. The scope of protection of this utility model is defined by the appended claims, specification, and their equivalents.

Claims

1. A four-station hollow blow molding machine, characterized in that, include: An extrusion system, the extrusion system comprising an extruder and an extruder head; Four forming mechanisms are arranged in front of the extruder head, and the four forming mechanisms are arranged in two rows along the longitudinal direction and in two columns along the transverse direction. An online deflashing mechanism is located in front of each of the aforementioned forming mechanisms; and, The displacement mechanism includes a pair of longitudinally extending slide rails, two pairs of longitudinal slide tables slidably fitted on the pair of longitudinal slide rails, a pair of transverse slide rails with their ends connected to the longitudinal slide tables, a first transverse slide table and a second transverse slide table slidably fitted on the pair of transverse slide rails, a blank manipulator is movably mounted on the first transverse slide table, and a product manipulator is movably mounted on the second transverse slide table. The blank manipulator has a first gripper for gripping the blank, and the product manipulator has a second gripper for gripping the blow-molded product.

2. The four-station hollow blow molding equipment according to claim 1, characterized in that, The displacement mechanism includes a pair of longitudinal beams extending longitudinally, on which a longitudinal rack and a longitudinal slide rail are mounted. A first motor and a first gear coaxially rotatably connected to the first motor are mounted on each of the longitudinal slides, and the first gear meshes with the longitudinal rack for transmission.

3. The four-station hollow blow molding equipment according to claim 2, characterized in that, The displacement mechanism further includes a pair of crossbeams, with each crossbeam having two ends fixedly connected to the longitudinal slides on both sides.

4. The four-station hollow blow molding equipment according to claim 3, characterized in that, Two longitudinal slides are connected to the same crossbeam. One slide is equipped with a second motor and a drive wheel that is connected to the second motor. The other slide is equipped with a driven wheel. The crossbeam is hollow inside. A synchronous belt is tensioned between the drive wheel and the driven wheel. The first or second transverse slide is fixedly connected to the synchronous belt on one side.

5. The four-station hollow blow molding equipment according to claim 1, characterized in that, The first gripper has a pair of gripping arms, the pair of gripping arms extending rearward by a greater distance than extending forward.

6. The four-station hollow blow molding equipment according to claim 5, characterized in that, At least one of the clamping arms has a toothed structure on its inner edge.

7. The four-station hollow blow molding equipment according to claim 5, characterized in that, Each pair of clamping arms has a liner made of polytetrafluoroethylene material.

8. The four-station hollow blow molding equipment according to claim 1, characterized in that, The product manipulator has a second vertical track extending in a vertical direction, a rotary cylinder disposed at the lower end of the second vertical track, the rotary cylinder having a rotation output shaft, and the second gripper being fixedly mounted on the rotation output shaft.

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