A preform orientation mechanism

Abstract

A preform orientation mechanism, wherein the rotation of a transmission shaft drives a turntable and a sprocket to rotate, the turntable drives multiple sliding assemblies to rotate, and the sprocket drives multiple chain frame assemblies to rotate through a tensioning action. Before the chain frame assembly rotates to a heating portion, a heating head of the chain frame assembly is first inserted into the preform to be heated, and then the chain frame assembly drives the preform to continue to rotate, so that the preform is heated symmetrically twice and then drives the preform to enter under the sliding assembly. When the chain frame assembly drives the preform to enter under the sliding assembly, a plug plate of a fork of the sliding assembly rotated to the chain frame assembly is inserted into a groove on a transmission sleeve on the chain frame assembly, and a part of the inclined surface on the plug plate contacts the side wall of the groove. With the rotation of the sprocket and the turntable, the side wall of the groove of the transmission sleeve is completely fitted with the inclined surface of the plug plate on the fork, and the chain frame assembly stops rotating. At this time, the preform on the heating head has rotated a certain angle with the heating head, and the preform at this angle can be accurately placed in a flat bottle blowing mold.

Description

Technical Field

[0001] The invention relates to the field of bottle blowing, and in particular to a bottle embryo orientation mechanism. Background Art

[0002] Common blow-molded products come in a variety of shapes, including round, square, and flat. Round containers are widely used because of their convenient blow mold manufacturing, uniform wall thickness, and high production efficiency. However, the disadvantage of round containers is that the utilization rate of the transportation tools that can be used during transportation or the utilization rate of the volume that can be used when packed in a box is only 75% at most, and the same volume of packaged objects requires more transportation volume; the advantages of square containers are high effective volume utilization, convenient transportation and packaging, large surface area, and stable storage, but the disadvantage is that the air bearing capacity is not as strong as that of round containers. When under pressure, square containers are prone to expand and deform outwards; flat containers are improved to address the shortcomings of round and square containers. They combine the advantages of round and square containers, have excellent mechanical properties in terms of strength and deformation, and are currently being increasingly developed and applied in the packaging of daily chemicals, edible oils, alcoholic beverages, and other products.

[0003] In the case of vertical flat containers, material distribution is very important. If the material distribution facing the long side is too thick, the quality of the blow-molded flat container will be affected. Therefore, to ensure the production of high-quality flat containers, the preform is heated symmetrically in the heating furnace so that the temperature of the rotating preform at least in its longitudinal portion 11 is heated to a temperature higher than that of the rest of the preform 12, such as Figure 1 As shown, the heated preform should be realized in the mold cavity as follows Figure 2 The precise direction shown is that the portion with high heating temperature faces the long side 13 of the mold cavity, and the portion with low heating temperature faces the short side of the mold cavity, as shown in FIG. Figure 3 However, if the preform is precisely oriented in the mold cavity to achieve high-efficiency and high-quality bottle blowing, the preform after heating must be precisely oriented on the heating head before it leaves the heating head and is just clamped by the mechanical gripper. To address this problem, current bottle blowing machines generally use a dedicated guide box to achieve this function, which has a complex structure, is difficult to process, and has low production efficiency. Summary of the invention

[0004] The present invention aims to provide a preform orienting mechanism which can orient accurately, has a simple structure and high production efficiency.

[0005] The bottle embryo orientation mechanism of the present invention comprises a transmission shaft, a sprocket wheel which rotates with the transmission shaft and is located below, and a rotating disk which is located above, a plurality of sliding assemblies which rotate with the transmission shaft and can be lifted and lowered are connected to the rotating disk, and a plurality of chain frame assemblies which can rotate with the sprocket wheel and can be lifted and lowered with the sliding assembly are arranged below the sliding assembly; the sliding assembly comprises a shift fork which is arranged at its bottom end, the shift fork comprises a connecting block which is used to be connected with the bottom end of the sliding assembly, a plug plate which protrudes outwards is arranged at the edge of the connecting block, and a free end of the plug plate presents an inclined surface with an inclined angle; the chain frame assembly comprises a transmission sleeve which is arranged at its top end, a groove is arranged on the side wall of the transmission sleeve, and the groove is opposite to the shift fork on the sliding assembly, when the chain frame assembly drives the bottle embryo to rotate to be opposite to any one of the sliding assemblies after heating, the plug plate of the shift fork is inserted into the groove and a part of the inclined surface on the plug plate contacts the side wall of the groove, and the inclined surface on the shift fork plug plate is completely fitted with the side wall of the groove as the chain frame assembly rotates.

[0006] In the bottle preform orientation mechanism described in the present invention, the transmission shaft rotates, driving the turntable and the sprocket to rotate, the turntable drives the multiple sliding components to rotate, and the sprocket drives the multiple chain frame components to rotate through the tensioning action. Before the chain frame component rotates to the heating part, the heating head of the chain frame component is first inserted into the bottle preform to be heated, and then the chain frame component drives the bottle preform to continue to rotate, so that the bottle preform is heated twice symmetrically and then drives the bottle preform to enter under the sliding component. When the chain frame component drives the bottle preform to enter under the sliding component, because the chain frame component enters under the sliding component and the groove of the transmission sleeve on the chain frame component contacts the inclined surface part on the plug plate of the shift fork, as the chain frame component rotates to the heating part, the heating head of the chain frame component is inserted into the bottle preform to be heated. Then, the chain frame component drives the bottle preform to continue to rotate, so that the bottle preform is heated twice symmetrically and then drives the bottle preform to enter under the sliding component. When the chain frame component drives the bottle preform to enter under the sliding component, The frame assembly and the sliding assembly continue to rotate, and the friction force causes relative movement between the two, so that the transmission sleeve drives the core shaft to rotate, and the core shaft stops rotating after the side wall of the groove of the transmission sleeve is completely fitted with the inclined surface of the plug plate of the fork, so that the bottle preform on the core shaft heating head rotates to a predetermined angle, which is the angle of the inclined surface of the plug plate on the fork, to ensure accurate orientation of the bottle preform. The bottle preform at this angle can be accurately placed in the flat bottle blowing mold after being clamped by the subsequent mechanical clamp. It can be seen that the precise orientation of the bottle preform can be achieved through the cooperation of the transmission sleeve and the fork, and the structure is simple and the cost is low. Accurate orientation can be achieved during the heating transmission process, and the production efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 Schematic diagram of the bottle embryo structure.

[0008] Figure 2 and Figure 3 Schematic diagram of the placement structure of the bottle embryo in the flat blow molding mold.

[0009] Figure 4 and Figure 5 It is a schematic diagram of the structure of the present invention.

[0010] Figure 6 for Figure 5 A partial enlarged view of part A.

[0011] Figure 7 It is a schematic diagram of the connection structure of the sliding assembly, chain frame assembly, transmission shaft, sprocket and turntable.

[0012] Figure 8 Schematic diagram of the sliding component.

[0013] Fig. 9 Schematic diagram of the chain link frame assembly.

[0014] Fig.10 Schematic diagram of the change of the contact surface between the transmission sleeve and the fork (i.e. Figure 4 (partially enlarged view in EE direction).

[0015] Fig.11 Schematic diagram of the mechanical gripper grabbing the preform (i.e. Figure 4 (Partial enlarged view in the KK direction). DETAILED DESCRIPTION

[0016] A preform orientation mechanism, such as Figures 4 to 11 As shown, it includes a transmission shaft 1, on which a sprocket 2 rotating with the transmission shaft 1 and located below and a turntable 3 located above are arranged, and a plurality of sliding components rotating with the transmission shaft 1 and capable of being raised and lowered are connected to the turntable 3, and a plurality of chain link frame components rotating with the sprocket 2 and capable of being raised and lowered with the sliding components are arranged below the sliding components; the sliding components include a shift fork arranged at the bottom end thereof, and the shift fork includes a connecting block 4 for connecting with the bottom end of the sliding components, and an outwardly protruding plug plate 5 is arranged at the edge of the connecting block 4, and the plug plate 5 The free end of the chain link frame assembly is formed into an inclined surface 6 with an inclined angle; the chain link frame assembly includes a transmission sleeve 7 arranged at the top thereof, and a groove 8 is arranged on the side wall of the transmission sleeve 7, and the groove 8 is opposite to the fork on the sliding assembly. When the chain link frame assembly drives the bottle preform 9 to rotate to be opposite to any sliding assembly after heating, the plug plate 5 of the fork is inserted into the groove 8 and a part of the inclined surface 6 on the plug plate 5 contacts the side wall of the groove 8, and the inclined surface 6 on the fork plug plate 5 is completely fitted with the side wall of the groove 8 as the chain link frame assembly rotates.

[0017] The sliding assembly includes a sliding block 10, on which a guide rod 11 and a slide rod 12 are vertically penetrated, and the guide rod 11 and the slide rod 12 also penetrate the turntable 3 and can slide up and down relative to the turntable 3. A positioning plate 13 is integrally connected to the lower ends of the guide rod 11 and the slide rod 12. The connecting block 4 of the shift fork is simultaneously connected to the bottom ends of the slide rod 12 and the positioning plate 13 through a fastener. A pin 14 is provided on the side wall of the sliding block 10, and a roller 15 that can rotate relative to the pin 14 is also provided on the pin 14; the preform orientation mechanism also includes a cam guide rail that matches the roller 15 of the sliding assembly, and the roller 15 rolls along the cam guide rail, and the undulating shape of the cam guide rail drives the sliding block 10 to upgrade, thereby driving the guide rod 11, the slide rod 12 and the shift fork to rise and fall. The roller 15 can be a rolling bearing, and the cam guide rail is a prior art. The roller 15 runs on the cam rail to drive the slide bar 12, the guide bar 11 and the fork to move up and down, and the fork drives the chain frame assembly to move up and down, so that the heating head 17 can be separated from the preform 9 clamped by the mechanical gripper 18. After the slide assembly rises, it can return to its original position by its own gravity.

[0018] The turntable 3 is provided with a turntable annular groove 19 on the side wall, the sliding assembly is provided in the turntable annular groove 19, and a first return spring 20 is provided on the guide rod 11 and between the upper end wall of the turntable annular groove 19 and the upper surface of the sliding block 10. When the sliding block 10 rises, the first return spring 20 is squeezed, and when the sliding block 10 descends, the sliding block 10 can be pushed down by the elastic recovery of the first return spring 20, thereby driving the guide rod 11, the slide rod 12 and the shift fork to descend, so that the shift fork drives the chain link frame assembly to descend, so as to prepare for the next bottle embryo insertion.

[0019] The chain link frame assembly includes a chain link frame 21, a sleeve shaft 22 vertically penetrates the chain link frame 21, a chain link 23 is arranged inside the chain link frame 21 and on the outer wall of the sleeve shaft 22, the chain link frames 21 of adjacent chain link frame assemblies are hinged as a whole, and a core shaft 24 is vertically arranged inside the sleeve shaft 22, which can rotate relative to it and slide up and down, the bottom end of the core shaft 24 is connected to the heating head 17, and the top end of the core shaft 24 is connected to the transmission sleeve 7. By lifting and lowering the sliding assembly, the transmission sleeve 7 is driven to lift and lower, and then the core shaft 24 and the heating head 17 thereon are driven to lift and lower; and because the chain frame assembly enters under the sliding assembly and the groove 8 of the transmission sleeve on the chain frame assembly is in partial contact with the inclined surface 6 on the plug plate 5 of the shift fork, as the chain frame assembly and the sliding assembly continue to rotate, the two will produce relative movement due to friction, so that the transmission sleeve 7 drives the core shaft 24 to rotate, so that the side wall of the groove 8 of the transmission sleeve 7 is completely fitted with the inclined surface 6 of the plug plate of the shift fork, and the core shaft 24 stops rotating, so that the bottle preform 9 on the heating head 17 of the core shaft 24 is rotated to a predetermined angle, ensuring the precise orientation of the bottle preform. The chain link frames of adjacent chain link frame assemblies are hinged as a whole to form a closed loop, forming a heating chain, and the sprocket 2 includes a left sprocket group and a right sprocket, the left sprocket group includes an upper sprocket and a lower sprocket, the chain link frames of some chain link frame assemblies are meshed with the upper sprocket and the lower sprocket of the left sprocket group at the same time, and the chain link frames of some chain link frame assemblies are meshed with the right sprocket, and the heating chain is tensioned when passing through the sprocket 2.

[0020] A self-rotating sprocket 25 is arranged on the mandrel 24 and between the sleeve shaft 22 and the transmission sleeve 7. The preform orientation mechanism also includes a chain 36. When the self-rotating sprocket 25 rotates to the chain 36, the self-rotating sprocket 25 and the chain 36 are meshed with each other. When the chain link frame assembly rotates with the sprocket 2, the self-rotating sprocket 25 meshed with the chain 36 drives the mandrel 24 to rotate, so that the mandrel 24 drives the transmission sleeve 7 to rotate to a suitable angle, preparing for the chain link frame assembly to enter the bottom of the sliding assembly and contact the inclined surface of the fork plug plate of the sliding assembly. In this embodiment, the chain 36 is arranged in two rows, and the self-rotating sprockets 25 of adjacent chain link frame assemblies are in an up-and-down misaligned state, such as Figure 5 As shown, the self-rotating sprockets 25 of adjacent chain link cage assemblies are prevented from interfering with each other.

[0021] A positioning groove 26 is provided on the top surface of the self-rotating sprocket 25, and a bottom boss 27 is provided on the bottom surface of the transmission sleeve 7. The bottom boss 27 of the transmission sleeve 7 is inserted into the positioning groove 26 on the top surface of the self-rotating sprocket 25, so that when the sliding assembly drives the transmission sleeve 7 to rise and fall, the transmission sleeve 7 can drive the self-rotating sprocket 25 and the mandrel 24 to rise and fall. An oil-containing bearing 28 is provided at the upper and lower ends of the sleeve shaft 22 and on the outer wall of the mandrel 24, and an end face bearing 29 is also provided at the lower end of the sleeve shaft 22 and on the outer wall of the mandrel 24.

[0022] A spring upper bushing 30 is provided at the lower end of the sleeve shaft 22 and on the outer wall of the mandrel 24, a spring lower bushing 31 is provided on the outer wall of the lower end of the mandrel 24, and a second return spring 32 is provided between the spring upper bushing 30 and the spring lower bushing 31 and on the outer wall of the mandrel 24. The mandrel 24 compresses the second return spring 32 when it rises, and when it descends, it not only has the thrust given to it by the sliding component, but also has the thrust given to the mandrel 24 when the second return spring 32 elastically recovers, so that the mandrel 24 can quickly return to its original position for the next round of embryo insertion.

[0023] A bolt 33 is provided on the top surface of the transmission sleeve 7, and a guide roller 34 that can rotate relative to the bolt 33 is provided on the outer side wall thereof. Two opposing wedge-shaped guide blocks 35 are provided on the same side of the turntable 3, respectively. The inclined surfaces of the two wedge-shaped guide blocks 35 are in opposite directions. When the chain link frame assembly rotates out of the turntable 3 position or rotates into the turntable 3 position, the guide roller 34 thereon contacts with the inclined surfaces of the wedge-shaped guide blocks 35 and is guided. Figure 4 As shown, the cooperation between the wedge-shaped guide block 35 and the guide roller 34 can make the preform 9 more evenly heated during the two symmetrical heatings. The guide roller 34 can be a rolling bearing.

Claims

1. A preform orientation mechanism, comprising a transmission shaft (1), a sprocket (2) rotating with the transmission shaft (1) and located below the transmission shaft (1) and a turntable (3) located above the transmission shaft (1), a plurality of sliding assemblies rotating with the transmission shaft (1) and capable of being raised and lowered are connected to the turntable (3), and a plurality of chain link frame assemblies rotating with the sprocket (2) and capable of being raised and lowered are arranged below the sliding assemblies; the characteristics are as follows: The sliding assembly comprises a shift fork arranged at its bottom end, the shift fork comprises a connecting block (4) for connecting with the bottom end of the sliding assembly, an outwardly protruding plug plate (5) is arranged at the edge of the connecting block (4), and the free end of the plug plate (5) is an inclined surface (6) with an inclined angle; the chain frame assembly comprises a transmission sleeve (7) arranged at its top end, a groove (8) is arranged on the side wall of the transmission sleeve (7), and the groove (8) is opposite to the shift fork on the sliding assembly. When the chain frame assembly drives the preform (9) to rotate to be opposite to any sliding assembly after being heated, the plug plate (5) of the shift fork is inserted into the groove (8) and a part of the inclined surface (6) on the plug plate (5) contacts the side wall of the groove (8), and along with the chain frame assembly The self-rotation of the shift fork plug plate (5) makes the inclined surface (6) on the shift fork plug plate (5) completely fit with the side wall of the groove (8), the sliding assembly comprises a sliding block (10), a guide rod (11) and a slide rod (12) vertically penetrate the sliding block (10), the guide rod (11) and the slide rod (12) also penetrate the turntable (3) and can slide up and down relative to the turntable (3), a positioning plate (13) is integrally connected to the lower ends of the guide rod (11) and the slide rod (12), the connecting block (4) of the shift fork is simultaneously connected to the bottom ends of the slide rod (12) and the positioning plate (13) through a fastener, a pin shaft (14) is arranged on the side wall of the sliding block (10), and a roller (15) that can rotate relative to the pin shaft (14) is also arranged on the pin shaft (14);The preform orientation mechanism also includes a cam guide rail (16) matched with the roller (15) of the sliding assembly. The roller (15) rolls along the cam guide rail (16), and the undulating shape of the cam guide rail (16) drives the sliding block (10) to rise and fall, thereby driving the guide rod (11), the sliding rod (12) and the shift fork to rise and fall. A turntable annular groove (19) is provided on the side wall of the turntable (3). The sliding assembly is arranged in the turntable annular groove (19). A first return spring (20) is provided on the guide rod (11) and between the upper end wall of the turntable annular groove (19) and the upper surface of the sliding block (10). The chain frame assembly The component comprises a chain link frame (21), a sleeve shaft (22) vertically passes through the chain link frame (21), a chain link (23) is arranged in the chain link frame (21) and on the outer wall of the sleeve shaft (22), the chain link frames (21) of adjacent chain link frame assemblies are hinged as a whole, a core shaft (24) is vertically arranged in the sleeve shaft (22) and can rotate relative to the core shaft and slide up and down, the bottom end of the core shaft (24) is connected to a heating head (17), the top end of the core shaft (24) is connected to a transmission sleeve (7), a self-rotating sprocket (25) is arranged on the core shaft 24 and between the sleeve shaft (22) and the transmission sleeve (7), and the preform orientation mechanism also includes a chain ( 36), when the self-rotating sprocket (25) rotates to the chain (36), the self-rotating sprocket (25) and the chain (36) are meshed with each other, a positioning groove (26) is arranged on the top surface of the self-rotating sprocket (25), a bottom boss (27) is arranged on the bottom surface of the transmission sleeve (7), the bottom boss (27) of the transmission sleeve (7) is inserted into the positioning groove (26) on the top surface of the self-rotating sprocket (25), a spring upper cushion sleeve (30) is arranged at the lower end of the sleeve shaft 22 and on the outer wall of the core shaft (24), a spring lower cushion sleeve (31) is arranged on the outer wall of the lower end of the core shaft (24), and the spring upper cushion sleeve (30) and the spring lower cushion sleeve (31) are arranged on the outer wall of the lower end of the core shaft (24). A second return spring (32) is also arranged between the gasket (31) and on the outer wall of the core shaft (24). A bolt (33) is arranged on the top surface of the transmission sleeve 7. A guide roller (34) that can rotate relative to the bolt (33) is arranged on the outer wall of the bolt (33). Two opposite wedge-shaped guide blocks (35) are arranged on the same side of the turntable (3). The inclined surfaces of the two wedge-shaped guide blocks (35) are in opposite directions. When the chain link frame assembly rotates out of the turntable (3) or into the turntable (3), the guide rollers (34) thereon are in contact with the inclined surfaces of the wedge-shaped guide blocks (35) and are guided. The guide rollers (34) are rolling bearings. ;

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