Quick die nozzle changing mechanism for bottle body blow molding machine and bottle body blow molding machine

Abstract

The utility model relates to the technical field of bottle body blow molding machines, in particular to a quick die nozzle changing mechanism for a bottle body blow molding machine and the bottle body blow molding machine. The rapid die nozzle replacing mechanism comprises a mounting plate and at least three die nozzle assemblies used for fixing bottle blanks. A driving motor is arranged on the mounting plate, a rotating disc is arranged on an output shaft of the driving motor, a plurality of quick-release locking assemblies which are in one-to-one correspondence with the die nozzle assemblies and movably lock the die nozzle assemblies on the rotating disc are arranged on the rotating disc at equal intervals in a circumferential array mode, and the quick-release locking assemblies are connected with the die nozzle assemblies in a clamped mode. According to the utility model, the die nozzle assembly is clamped and fixed on the turntable through the quick-release locking assembly, so that the time for replacing the die nozzle assembly is greatly shortened, and the effective efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bottle blow molding machines, and more particularly to a quick die-changing nozzle mechanism for a bottle blow molding machine and the bottle blow molding machine. Background Art

[0002] Most beverage bottles on the market are produced by blow molding machines. Blow molding machines are machines that extrude or injection mold thermoplastic resin or plastic to obtain tubular preforms. After heating to a softened state, they are placed in a split mold. After the mold clamping mechanism drives the mold to close, compressed air is immediately introduced into the preform to inflate the plastic preform and make it stick to the inner wall of the mold. After cooling and demolding, various hollow products are made.

[0003] To improve production efficiency, existing blow molding machines often utilize a turntable-style, multi-station production system. Specifically, the turntable houses an injection station for producing preforms, a blow molding station for inflating the preforms into bottles, and a removal station for removing the formed bottles from the blow molding machine. Specifically, the preforms are secured to the turntable via a nozzle assembly and sequentially pass through the injection, blow molding, and removal stations.

[0004] However, the existing die nozzle assembly is one-to-one with the size of the preform and is fixed to the turntable by bolts. This means that when switching between different sizes of preforms, the die nozzle assembly must be replaced at the same time. In other words, the existing blow molding machine has the disadvantages of long die nozzle replacement time and low production efficiency. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a quick die-changing nozzle mechanism for a bottle blow molding machine, so as to solve the problems of long die-changing nozzle time and low production efficiency in the prior blow molding machine.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A quick die-changing nozzle mechanism for a bottle blow molding machine comprises a mounting plate and at least three die-changing nozzle assemblies for fixing a bottle blank; a drive motor is provided on the mounting plate, a turntable is provided on the output shaft of the drive motor, a number of quick-release locking assemblies corresponding to the die-changing nozzle assemblies and movably locking the die-changing nozzle assemblies on the turntable are provided in a circular array at equal intervals on the turntable, and the quick-release locking assemblies are clamped to the die-changing nozzle assembly.

[0008] Optionally, the quick-release locking assembly includes two fixed blocks located at one end and the other end of the die nozzle assembly, with connecting bolts provided at both ends of the fixed blocks, and a slider for movably engaging the die nozzle assembly is slidably provided in the middle of the fixed block, and connecting through holes for accommodating the connecting bolts are provided at both ends of the slider; the connecting bolt is fixed on the fixed block after passing through the connecting through hole; a spring for driving the slider to engage the die nozzle assembly is accommodated in the connecting through hole, and the spring is sleeved with the connecting bolt; one end of the spring presses against the connecting bolt, and the other end presses against the slider; the fixed block is fixedly connected to the turntable and is slidably connected to the die nozzle assembly.

[0009] Optionally, the die nozzle assembly includes a detachable connecting plate, on which are provided a number of mouth molds for fixing the bottle blanks, and on which are provided air guide tubes for extending out of the internal space of the bottle blanks; both ends of the detachable connecting plate are provided with slots corresponding to the sliders, and the sliders are movably connected in the slots.

[0010] Optionally, an inclined hole is provided on the slider, a cylinder is provided on the mounting plate, and an inclined pin is provided on the output shaft of the cylinder for movably inserting into the inclined hole and driving the slider away from the die nozzle assembly to switch the die nozzle assembly from a locked state to an unlocked state. The inclined pin passes through the mounting plate and the turntable in sequence.

[0011] Optionally, four die nozzle assemblies are provided on the turntable.

[0012] Optionally, the drive motor is a servo motor.

[0013] Another object of the present invention is to provide a bottle blow molding machine, which comprises a frame, a lifting frame is slidably provided on the frame, and the aforementioned quick die-changing nozzle mechanism is slidably clamped on the lifting frame.

[0014] Compared with the prior art, the above-mentioned embodiment of the present invention has the following beneficial effects: the die nozzle assembly is clamped and fixed on the turntable by the quick-release locking assembly, so that the time required to replace the die nozzle assembly is greatly shortened, thereby improving the effectiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a first structural diagram of the present utility model;

[0016] Figure 2 It is a second structural schematic diagram of the utility model;

[0017] Figure 3 It is a top view of the utility model;

[0018] Figure 4 This is a schematic structural diagram of the quick-release locking assembly in the utility model;

[0019] Figure 5 This is a structural diagram of the die nozzle assembly of the utility model;

[0020] Figure 6 It is a side schematic diagram of the local structure of the utility model;

[0021] Figure 7 yes Figure 6 Cross-sectional view at section FF;

[0022] Figure 8 yes Figure 3 Cross-sectional view at section EE;

[0023] Figure 9 The utility model is a structural schematic diagram of the utility model installed on a bottle blow molding machine. DETAILED DESCRIPTION

[0024] To make the objectives, features, and advantages of the present invention more readily apparent, the following detailed description of the present invention is provided with reference to the accompanying drawings. The accompanying drawings illustrate several embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0026] The utility model provides a quick die-changing nozzle mechanism for a bottle blow molding machine. Figure 1-9 As shown, it includes a mounting plate 1 and at least three die nozzle assemblies 2 for fixing the bottle blank; a driving motor 3 is provided on the mounting plate 1, a turntable 4 is provided on the output shaft of the driving motor 3, and a plurality of quick-release locking assemblies 5 corresponding to the die nozzle assemblies 2 and movably locking the die nozzle assemblies 2 on the turntable 4 are provided in an evenly spaced circular array on the turntable 4, and the quick-release locking assembly 5 is clamped to the die nozzle assembly 2.

[0027] In this embodiment, the base end of the drive motor 3 is bolted to the upper surface of the mounting plate 1. Its output shaft extends downward through the mounting plate 1 and is keyed to the center of the turntable 4. Three workstations are arranged in a circular array at equal intervals on the turntable 4. Each workstation is secured with a quick-release locking assembly 5 by bolts. These three quick-release locking assemblies 5 correspond to the injection molding station, blow molding station, and removal station on the turntable 4, respectively. The line connecting adjacent workstations to the center of the turntable 4 is 120 degrees. A die nozzle assembly 2 is clamped to the bottom of each quick-release locking assembly 5. When producing bottle bodies, the mounting plate 1 moves downward under the drive of the lifting frame 7, so that the die nozzle assembly 2 located on the injection molding station extends into the injection mold to fix the bottle blank, and then the lifting frame 7 drives the mounting plate 1 to move upward; then the driving motor 4 drives the turntable 4 to rotate 120 degrees, and the mounting plate 1 moves downward under the drive of the lifting frame 7, so that the die nozzle assembly 2 located on the blow molding station moves the bottle blank into the blow molding mold for blow molding the bottle blank. After the blow molding is completed, the lifting frame 7 drives the mounting plate 1 to move upward; then the driving motor 4 drives the turntable 4 to rotate 120 degrees, and moves the blow-molded bottle body to the retrieval station, waiting for the robot to pick it up; then the injection molding, blow molding, and retrieval steps are repeated in sequence.

[0028] The utility model clamps and fixes the die nozzle assembly 2 on the turntable 4 through the quick-release locking assembly 5, so that the time required to replace the die nozzle assembly 4 is greatly shortened, thereby improving the working efficiency.

[0029] Furthermore, the quick-release locking assembly 5 includes two fixed blocks 51 respectively located at one end and the other end of the die nozzle assembly 2, and connecting bolts 52 are provided at both ends of the fixed block 51. A slider 53 for movably engaging the die nozzle assembly 2 is slidably provided in the middle of the fixed block 51, and connecting through holes 531 for accommodating the connecting bolts 52 are provided at both ends of the slider 53; the connecting bolt 52 is fixed on the fixed block 51 after passing through the connecting through hole 531; a spring 54 for driving the slider 53 to engage the die nozzle assembly 2 is accommodated in the connecting through hole 531, and the spring 54 is sleeved with the connecting bolt 52; one end of the spring 54 is pressed against the connecting bolt 52, and the other end is pressed against the slider 53; the fixed block 51 is fixedly connected to the turntable 4, and is slidably connected to the die nozzle assembly 2.

[0030] like Figure 4-7As shown, there are two fixed blocks 51, one for fixing the two ends of the die nozzle assembly 2, and fixed to the turntable 4 by bolts; the slider 53 is T-shaped, and is slidably engaged with the fixed block 51 in cooperation with the connecting bolt 52 and the spring 4; the slider 53 normally engages the die nozzle assembly 2 when not subject to external force. When the die nozzle assembly 2 needs to be replaced, the slider 53 is pulled away from the die nozzle assembly 2 by hand, and then the die nozzle assembly 2 is pulled out to complete the removal of the die nozzle assembly 2. Slide the die nozzle assembly 2 of another specification between the two fixed blocks 51, and then loosen the slider 53 so that the slider 53 is inserted into the card slot 211 to complete the installation of the die nozzle assembly 2. The die nozzle assembly 2 can be replaced by simply pushing and pulling the slider 53, which is convenient and quick.

[0031] Furthermore, the die nozzle assembly 2 includes a detachable connecting plate 21, on which are provided a plurality of mouth molds 22 for fixing the bottle blanks, and on which are provided an air guide tube 23 for extending out of the internal space of the bottle blanks; both ends of the detachable connecting plate 21 are provided with a card slot 211 corresponding to the slider 53, and the slider 53 is movably connected in the card slot 211.

[0032] like Figure 5 As shown, the detachable connecting plate 21 is composed of two half-plates connected by bolts. Two or more nozzles 22 are fixedly mounted along its length by means of a snap-fit structure between the two half-plates. The nozzles 22 are inserted into the mouth of the preform, securing the preform with an interference fit. A gas guide tube 23 is threadedly connected to the bottom of the nozzles 22. This tube 23 delivers compressed gas to the preform, inflating it within the blow mold cavity. The bolted connection of the two half-plates to form the detachable connecting plate 21 allows the nozzles 22 to be replaced individually if worn, avoiding the need to scrap the entire nozzle assembly 2.

[0033] Furthermore, an inclined hole 532 is provided on the slider 53, a cylinder 11 is provided on the mounting plate 1, and an inclined pin 12 is provided on the output shaft of the cylinder 11 for movably inserting into the inclined hole 532 and driving the slider 53 away from the die nozzle assembly 2 to switch the die nozzle assembly 2 from a locked state to an unlocked state. The inclined pin 12 passes through the mounting plate 1 and the turntable 4 in sequence.

[0034] like Figure 1 and Figure 8 As shown, the cylinder 11 is bolted to the mounting plate 1, and its output shaft is mounted with an angled latch 12 by welding or other conventional means. In conjunction with the controller and solenoid valve, the cylinder 11 moves downward, inserting the angled latch 12 into the angled hole 532 and pushing the slider 53 away from the slot 211, switching the die nozzle assembly 2 from a locked state to an unlocked state. This design further speeds up the replacement of the die nozzle assembly 2 and is safer and more convenient than manually pulling out the slider 53 in the previous embodiment.

[0035] Furthermore, four die nozzle assemblies 2 are provided on the turntable 4 .

[0036] like Figure 3 As shown, the four die nozzle assemblies 2 correspond to the injection molding station (arrow A), heating station (arrow D), blow molding station (arrow B), and removal station (arrow C). For large bottles with thick walls, the preforms need to be heated again after injection molding before blow molding. Otherwise, the rate of blow molding defects will increase significantly. In this case, heating the preforms at the heating station with the help of external heating equipment before blow molding can effectively solve many blow molding defects. Compared with the conventional three-station structure, the four-station structure of this embodiment has better applicability and can meet the production of more bottles of different specifications.

[0037] Furthermore, the driving motor 3 is any one of a stepping motor and a servo motor. In view of the rotation accuracy, the servo motor is preferably used.

[0038] like Figure 9 As shown, the quick die-changing nozzle mechanism in the present invention is used on a bottle blow molding machine, which includes a frame 6, on which a lifting frame 7 is slidably provided. The lifting frame 7 is driven by a driving mechanism, and a quick die-changing nozzle mechanism is slidably engaged with the lifting frame 7; specifically, the mounting plate 1 is slidably engaged with the lifting frame 7, and after the lifting frame 7 drives the mounting plate 1 to move downward a certain distance D1, the lifting frame 7 further moves downward a distance D2; in the ascending stage, the lifting frame 7 first moves upward a distance D2, and then drives the mounting plate 1 to move upward a distance D1, and the following steps of injection molding, blow molding, and removal of the bottle are completed in coordination.

[0039] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A quick die change nozzle mechanism for a bottle blow molding machine, characterized in that: It includes a mounting plate and at least three die nozzle assemblies for fixing the bottle blank; a driving motor is provided on the mounting plate, a turntable is provided on the output shaft of the driving motor, and a plurality of quick-release locking assemblies corresponding to the die nozzle assemblies and movably locking the die nozzle assemblies on the turntable are provided in an evenly spaced circular array on the turntable, and the quick-release locking assembly is clamped with the die nozzle assembly.

2. The rapid die-changing nozzle mechanism for a bottle blow molding machine according to claim 1, characterized in that: The quick-release locking assembly includes two fixed blocks located at one end and the other end of the die nozzle assembly, and connecting bolts are provided at both ends of the fixed blocks. A slider for movably engaging the die nozzle assembly is slidably provided in the middle of the fixed block, and connecting through holes for accommodating the connecting bolts are provided at both ends of the slider; the connecting bolts are fixed to the fixed block after passing through the connecting through holes; a spring for driving the slider to engage the die nozzle assembly is accommodated in the connecting through holes, and the spring is sleeved with the connecting bolt; one end of the spring presses against the connecting bolt, and the other end presses against the slider; the fixed block is fixedly connected to the turntable and is slidably connected to the die nozzle assembly.

3. The rapid die-changing nozzle mechanism for a bottle blow molding machine according to claim 2, characterized in that: The die nozzle assembly includes a detachable connecting plate, on which are provided a number of mouth molds for fixing the bottle blanks, and on which are provided an air guide tube for extending out of the internal space of the bottle blanks; both ends of the detachable connecting plate are provided with slots corresponding to the sliders, and the sliders are movably connected in the slots.

4. The rapid die-changing nozzle mechanism for a bottle blow molding machine according to claim 2, characterized in that: An inclined hole is provided on the slider, a cylinder is provided on the mounting plate, and an inclined pin is provided on the output shaft of the cylinder for movably inserting into the inclined hole and driving the slider away from the die nozzle assembly to switch the die nozzle assembly from a locked state to an unlocked state. The inclined pin passes through the mounting plate and the turntable in sequence.

5. The rapid die-changing nozzle mechanism for a bottle blow molding machine according to claim 1, characterized in that: Four die nozzle assemblies are arranged on the turntable.

6. The rapid die-changing nozzle mechanism for a bottle blow molding machine according to claim 5, characterized in that: The driving motor is a servo motor.

7. A bottle blow molding machine, characterized in that: The invention comprises a frame, a lifting frame is slidably provided on the frame, and a quick die-changing nozzle mechanism as claimed in any one of claims 1 to 6 is slidably clamped on the lifting frame.

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