Preform insertion and unloading mechanism of bottle blowing machine, and bottle blowing machine

Abstract

A preform insertion and unloading mechanism of a bottle blowing machine, and a bottle blowing machine. The preform insertion and unloading mechanism comprises an upper cam guide rail (100), a lower cam guide rail (200), movable rollers (300), sliding assemblies (400) and driving members (500), wherein the upper cam guide rail (100) is movably mounted on a heating frame of the bottle blowing machine in a first direction and is spaced apart from the lower cam guide rail (200), the upper cam guide rail (100) is provided with two cam portions (101) spaced apart from each other in a second direction, and the lower cam guide rail (200) is provided with recess portions (201) corresponding to the cam portions (101). The movable rollers (300) are movably mounted between the upper cam guide rail (100) and the lower cam guide rail (200), the sliding assemblies (400) are movably mounted on a turntable (20) of the bottle blowing machine in the first direction, the sliding assemblies (400) are connected to the movable rollers (300) and are each connected to a heating head (10) by means of a shifting fork (600), and the driving members (500) are connected to the upper cam guide rail (100).

Description

Preform insertion and unloading mechanism of blow molding machine and blow molding machine

[0001] This application claims priority to Chinese Patent Application No. 202510187377.0, filed on February 20, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of blow molding machine technology, for example to a preform insertion and unloading mechanism for a blow molding machine and a blow molding machine. Background Technology

[0003] The main processes in blow molding machines that form bottles from preforms include preform handling, heating, and blow molding. After heating, the preforms are transported by a robotic arm to the blow molding station for blowing. With the development of market demand, the market for high-volume blow molding machines is growing, and the requirements for high-speed, stable, and intelligent equipment are becoming increasingly stringent. In the actual process, the preforms need to enter and exit a heating machine after heating. This entry and exit is achieved through a preform insertion and removal mechanism that inserts and removes the heating head from the preform. The higher the production volume, the higher the requirements for the precision and stability of the preform insertion and removal mechanism. Conventional preform insertion and removal mechanisms have relatively poor stability, and deviations often occur during actual operation, leading to an increased waste rate. Summary of the Invention

[0004] The first objective of this application is to provide a preform insertion and removal mechanism for a blow molding machine, which has high precision and stability, reduces the probability of damage to parts when a malfunction occurs, and helps to improve the performance of the blow molding machine and reduce the scrap rate.

[0005] The second objective of this application is to provide a blow molding machine that has good stability and reliability, can reduce the probability of damage to parts when a malfunction occurs, and can reduce the scrap rate.

[0006] To achieve this objective, the following technical solution is adopted in this application:

[0007] This application discloses a preform insertion and unloading mechanism for a blow molding machine, comprising: an upper cam guide rail and a lower cam guide rail, the upper cam guide rail being movably mounted on the heating frame of the blow molding machine along a first direction and spaced apart from the lower cam guide rail; the upper cam guide rail having two cam portions spaced apart along a second direction; and the lower cam guide rail having groove portions corresponding to the cam portions; a movable roller movably mounted between the upper cam guide rail and the lower cam guide rail; and a sliding assembly movably mounted on the blow molding machine along the first direction. On the turntable, the sliding assembly is connected to the movable roller and to the heating head via a fork; the driving member is connected to the upper cam guide rail and drives the upper cam guide rail to reciprocate between the working position and the standby position; wherein, when the upper cam guide rail is in the working position and the turntable drives the sliding assembly to rotate, the movable roller can roll between the upper cam guide rail and the lower cam guide rail, and the cam part can drive the movable roller to move so as to drive the sliding assembly to move along the first direction, so that the heating head can be inserted into or pulled out of the preform.

[0008] In some embodiments, the sliding assembly includes: a slider connected to a roller pin of the movable roller; a first slide rod passing through the turntable and connected to the slider, one end of the first slide rod being connected to the shift fork; and a second slide rod arranged parallel to the first slide rod, passing through the turntable and connected to the slider, one end of the second slide rod being connected to the shift fork.

[0009] In some specific embodiments, the first slide rod passes through the slider and is locked by a connecting bolt, and one end of the first slide rod extending out of the slider is connected to the shift fork, and the second slide rod passes through the slider and is locked by a fixing pin.

[0010] In some more specific embodiments, the second slide bar is provided with a mounting groove, which is configured to mount a retaining spring, the retaining spring abutting against the slide bar.

[0011] In some specific embodiments, the sliding assembly further includes an elastic element, which is sleeved on the end of the first slide rod away from the shift fork. One end of the elastic element is fixedly disposed with the first slide rod, and the other end abuts against the turntable.

[0012] In some more specific embodiments, the other end of the first slide bar is connected to an end cap, one end of the elastic element abuts against the end cap, and the other end abuts against the turntable.

[0013] In some specific embodiments, a first bearing is provided between the first slide rod and the turntable, and a second bearing is provided between the second slide rod and the turntable.

[0014] In some embodiments, the preform insertion and unloading mechanism of the blow molding machine further includes an upper guide rail and a lower guide rail. The lower guide rail is fixed to the heating frame, and the upper guide rail is connected to the lower guide rail via a connecting rod and is spaced apart from the lower guide rail. The upper cam guide rail is movably mounted on the upper guide rail, and the lower cam guide rail is fixed to the lower guide rail.

[0015] In some specific embodiments, the upper cam guide rail includes an upper cam guide rail for inserting blanks and an upper cam guide rail for unloading blanks, and the upper cam guide rail for inserting blanks and the upper cam guide rail for unloading blanks are spaced apart along the second direction. Each of the upper cam guide rail for inserting blanks and the upper cam guide rail for unloading blanks is provided with a cam portion. The lower cam guide rail includes a lower cam guide rail for inserting blanks and a lower cam guide rail for unloading blanks, and the lower cam guide rail for inserting blanks and the lower cam guide rail for unloading blanks are spaced apart along the second direction. Each of the lower cam guide rail for inserting blanks and the lower cam guide rail for unloading blanks is provided with a groove portion. There are two driving members, which are respectively provided corresponding to the upper cam guide rail for inserting blanks and the upper cam guide rail for unloading blanks.

[0016] This application also discloses a blow molding machine, including the preform insertion and removal mechanism, turntable, preform transport mechanism, and preform handling robot described above. The preform insertion and removal mechanism can insert the heating head into the preform transported by the preform transport mechanism and cause the preform to detach from the preform transport mechanism. The turntable can drive the preform on the preform insertion and removal mechanism to move to a position corresponding to the preform handling robot. After the preform insertion and removal mechanism pulls the heating head out of the preform, the preform handling robot can move the preform away.

[0017] The preform insertion and unloading mechanism of the blow molding machine disclosed in this application offers the following advantages: Because the cam structure driving the heating head to rise and fall is divided into an upper cam guide rail and a lower cam guide rail, this split structure offers high installation flexibility, high tolerance for parts processing errors, and facilitates docking and adjustment. Furthermore, the split structure exhibits better precision and stability, which helps improve the overall reliability of the preform insertion and unloading mechanism. Simultaneously, if misalignment between the preform and the heating head is detected during preform insertion, the drive unit drives the upper cam guide rail to move upwards along a first direction, causing the cam portion to be hidden inside the heating frame. Even if the turntable continues to rotate, the heating head will not descend, thus preventing collision between the heating head and the preform. Similarly, during preform unloading, if asynchronous movement between the turntable and the preform handling robot is detected, the drive unit drives the upper cam guide rail to move upwards along the first direction, causing the cam portion to be hidden inside the heating frame. Even if the turntable continues to rotate, the heating head will not descend, thus preventing collision between the preform and the preform handling robot. This reduces the probability of parts damage in case of malfunction, improves the performance of the blow molding machine, and reduces the scrap rate.

[0018] The beneficial effects of the blow molding machine of this application are as follows: due to the preform insertion and unloading mechanism described above, the phenomenon of the heating head colliding with the preform when the preform and the heating head are misaligned during the insertion process is avoided, and the phenomenon of the preform colliding with the preform handling robot due to the asynchronous movement of the turntable and the preform handling robot during the unloading process is avoided, thereby improving the stability and reliability of the blow molding machine, reducing the probability of damage to parts when a malfunction occurs, and reducing the scrap rate. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the upper cam guide rail of the preform insertion and unloading mechanism of the blow molding machine according to an embodiment of this application in the standby state;

[0020] Figure 2 is a partial cross-sectional view of the structure shown in Figure 1;

[0021] Figure 3 is a schematic diagram of the upper cam guide rail of the preform insertion and unloading mechanism of the blow molding machine according to an embodiment of this application in the working state;

[0022] Figure 4 is a partial cross-sectional view of the structure shown in Figure 3.

[0023] Figure label:

[0024] 100. Upper cam guide rail; 101. Cam section; 110. Insertion blank upper cam guide rail; 120. Unloading blank upper cam guide rail;

[0025] 200, Lower cam guide rail; 201, Groove portion; 210, Insertion blank lower cam guide rail; 220, Unloading blank lower cam guide rail;

[0026] 300. Movable roller; 310. Roller pin;

[0027] 400. Sliding assembly; 410. Slider; 420. First slide rod; 430. Second slide rod; 431. Mounting slot; 440. Connecting bolt; 450. Fixing pin; 460. Snap ring; 470. Elastic element; 480. End cap;

[0028] 500, Drive component; 600, Shift fork; 700, Upper guide rail; 800, Lower guide rail; 900, Connecting rod;

[0029] 10. Heating head; 20. Turntable; 30. First bearing; 40. Second bearing. Detailed Implementation

[0030] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. The specific embodiments described herein are merely illustrative of the present application and are not intended to limit the scope of the application. For ease of description, only the parts relevant to the present application are shown in the drawings, not the entire structure.

[0031] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0033] This application discloses a preform insertion and removal mechanism for a blow molding machine (hereinafter referred to as the preform insertion and removal mechanism for ease of description). Referring to Figures 1 and 3, the preform insertion and removal mechanism includes an upper cam guide rail 100 and a lower cam guide rail 200, a movable roller 300, a sliding component 400, and a driving component 500. The upper cam guide rail 100 is movably mounted on the heating frame of the blow molding machine along a first direction and is spaced apart from the lower cam guide rail 200. The upper cam guide rail 100 is provided with two cam portions 101 spaced apart along a second direction. Each cam portion 101 is provided with a descending section, a straight section, and a rising section arranged sequentially along the second direction. The lower cam guide rail 200 has a groove 201 corresponding to the cam portion 101. A movable roller 300 is movably mounted between the upper cam guide rail 100 and the lower cam guide rail 200. A sliding assembly 400 is movably mounted on the turntable 20 of the blow molding machine along a first direction. The sliding assembly 400 is connected to the movable roller 300 and to the heating head 10 via a shift fork 600. A drive member 500 is connected to the upper cam guide rail 100 and drives the upper cam guide rail 100 to reciprocate between the working position and the standby position. When the upper cam guide rail 100 is in the working position and the turntable 20 drives the sliding assembly 400 to rotate, the movable roller 300 can roll between the upper cam guide rail 100 and the lower cam guide rail 200. The cam portion 101 can drive the movable roller 300 to move, thereby moving the sliding assembly 400 along the first direction, so that the heating head 10 can insert into or remove the preform.

[0034] In the actual process of blow molding, the preform transport mechanism transports the preform to the position corresponding to the preform insertion and removal mechanism. At this time, the preform insertion and removal mechanism drives the heating head 10 to descend, inserting it into the preform and causing the preform to detach from the preform transport mechanism. Then, the turntable 20 moves the preform on the preform insertion and removal mechanism to the position corresponding to the preform handling robot. After the preform insertion and removal mechanism pulls the heating head 10 out of the preform, the preform handling robot can remove the preform. In related technologies, if the preform transport mechanism fails to transport the preform to the correct position, or if the movement of the preform handling robot and the heating head 10 is not synchronized, it is very easy for the heating head 10 to collide with the preform or the preform handling robot.

[0035] During the operation of the preform insertion and removal mechanism in this embodiment, the drive member 500 drives the upper cam guide rail 100 to move downward in the first direction, causing the cam portion 101 to protrude from the heating frame. As the turntable 20 drives the sliding assembly 400, the movable roller 300 moves between the upper cam guide rail 100 and the lower cam guide rail 200. When the movable roller 300 moves to the first cam portion 101, driven by this cam portion 101, the movable roller 300 first descends and then rises. During the downward movement of the movable roller 300, the sliding assembly 400 descends accordingly, causing the heating head 10 to descend from a high position and insert into the preform. During the upward movement of the movable roller 300, the heating head 10 causes the preform to disengage from the preform transport mechanism. Turntable 20 continues to rotate. When the movable roller 300 moves to the second cam 101, driven by the cam 101, the movable roller 300 will first descend and then rise. During the descent of the movable roller 300, it will drive the preform into the preform handling robot. During the rise of the movable roller 300, the heating head 10 can pull out the preform, and the handling robot can then move the preform away. If misalignment between the preform and the heating head 10 is detected during the preform insertion process, the drive unit 500 drives the upper cam guide rail 100 to move upward in the first direction, so that the cam part 101 is hidden inside the heating frame. Even if the turntable 20 continues to rotate, the heating head 10 will not descend, thus avoiding the phenomenon of the heating head 10 colliding with the preform. During the preform unloading process, if the movement of the turntable 20 and the preform handling robot is not synchronized, the drive unit 500 drives the upper cam guide rail 100 to move upward in the first direction, so that the cam part 101 is hidden inside the heating frame. Even if the turntable 20 continues to rotate, the heating head 10 will not descend, thus avoiding the phenomenon of the preform colliding with the preform handling robot. This can reduce the probability of damage to parts when a malfunction occurs, which is beneficial to improving the performance of the blow molding machine and reducing the scrap rate.

[0036] Because the cam structure driving the movable roller 300 is split into two parts, the upper cam guide rail 100 and the lower cam guide rail 200, it offers high installation flexibility, high tolerance for errors in parts machining, and facilitates docking and adjustment. The split cam structure has good precision and stability, which helps to improve the reliability of the entire blank insertion and unloading mechanism.

[0037] To improve work efficiency, there are multiple sliding components 400, which are arranged at intervals along the circumference of the turntable 20.

[0038] Referring to Figures 2 and 4, the sliding assembly 400 includes a slider 410, a first slide rod 420, and a second slide rod 430. The slider 410 is connected to the roller pin 310 of the movable roller 300. The first slide rod 420 passes through the turntable 20 and is connected to the slider 410. One end of the first slide rod 420 is connected to the shift fork 600. The second slide rod 430 is arranged parallel to the first slide rod 420, passes through the turntable 20, and is connected to the slider 410. One end of the second slide rod 430 is connected to the shift fork 600. By setting the first slide rod 420 and the second slide rod 430, they are connected to the shift fork 600. The shift fork 600 is configured to mount the heating head 10. The double slide rod sliding structure composed of the first slide rod 420 and the second slide rod 430 has good stability and reliability, ensuring that when the movable roller 300 moves up and down under the drive of the cam part 101, the heating head 10 can move up and down synchronously under the drive of the sliding assembly 400.

[0039] In some embodiments, a first slide rod 420 passes through a slider 410 and is locked by a connecting bolt 440, with one end of the first slide rod 420 extending out of the slider 410 connected to a shift fork 600. A second slide rod 430 passes through the slider 410 and is locked by a fixing pin 450. The first slide rod 420 is connected to the slider 410 by the connecting bolt 440, and the second slide rod 430 is connected to the slider 410 by the fixing pin 450. This combination of connecting bolt 440 and fixing pin 450 allows for tolerance of machining errors while ensuring the accuracy of the relative position of the parts. In some embodiments, the second slide rod 430 is provided with a mounting groove 431, which is configured to mount a retaining spring 460, which abuts against the slider 410. The retaining spring 460 further strengthens the connection between the slider 410 and the second slide rod 430, withstands high-frequency impacts, and thus helps to extend the service life of the sliding assembly 400. In other embodiments of this application, the connection method between the first slide bar 420 and the second slide bar 430 and the slider 410 can be selected according to actual needs. For example, the first slide bar 420 and the second slide bar 430 and the slider 410 can be directly connected by welding, or they can be connected by key, etc., and are not limited to the above limitations.

[0040] Referring to Figures 2 and 4, the sliding assembly 400 also includes an elastic element 470. The elastic element 470 is sleeved on the end of the first slide rod 420 away from the shift fork 600. One end of the elastic element 470 is fixedly set with the first slide rod 420, and the other end abuts against the turntable 20. When the upper cam guide rail 100 is in the working position and the turntable 20 is rotating, the movable roller 300 moves along the surface of the upper cam guide rail 100 under the elastic force of the elastic element 470. The tension of the elastic element 470 acts as an upward thrust for the sliding assembly 400 composed of the first slide rod 420 and the second slide rod 430, which allows the sliding assembly 400 to move upward quickly during operation, and even move upward abruptly. This makes it suitable for the rising section curve of the upper cam guide rail 100 with a larger pressure angle, and is well-suited for high-volume blow molding machines. Furthermore, as mentioned above, during actual operation, the lower cam guide rail 200 remains stationary. If the elastic element 470 breaks, the groove 201 on the stationary lower cam guide rail 200 can provide protection, preventing the sliding assembly 400 from lacking sufficient upward thrust, thus avoiding the fork 600 from colliding with the spindle of the heating head 10. In some embodiments, the elastic element 470 is a spring. Of course, in other embodiments of this application, the elastic element 470 can also be selected from other elastic structural components as needed.

[0041] In some embodiments, the other end of the first slide rod 420 is connected to an end cap 480, and one end of the elastic member 470 abuts against the end cap 480, while the other end abuts against the turntable 20. Compared to directly fixing one end of the elastic member 470 to the first slide rod 420, in this embodiment, by providing an end cap 480 on the first slide rod 420, the twisting phenomenon that may occur in the elastic member 470 during actual operation can be reduced, thus reducing the probability of damage to the elastic member 470. The end cap 480 can be connected to the first slide rod 420 through a connection structure such as screws, fixing pins, snaps, or connecting keys. The specific connection method between the first slide rod 420 and the end cap 480 is not limited here.

[0042] In some embodiments, a first bearing 30 is provided between the first slide rod 420 and the turntable 20, and a second bearing 40 is provided between the second slide rod 430 and the turntable 20. During actual operation, driven by the movable roller 300, the first slide rod 420 and the second slide rod 430 move relative to the turntable 20 in a first direction. The added first bearing 30 and second bearing 40 can reduce the sliding friction between the first slide rod 420, the second slide rod 430, and the turntable 20, thereby reducing the wear of the first slide rod 420, the second slide rod 430, and the turntable 20, and helping to extend the service life of the first slide rod 420, the second slide rod 430, and the turntable 20. In the embodiments of this application, the model and type of the first bearing 30 and the second bearing 40 can be selected according to actual needs; the specific parameters of the first bearing 30 and the second bearing 40 are not limited here.

[0043] Referring to Figures 2 and 4, the preform insertion and unloading mechanism also includes an upper guide rail 700 and a lower guide rail 800. The lower guide rail 800 is fixed to the heating frame of the blow molding machine. The upper guide rail 700 is connected to the lower guide rail 800 via a connecting rod 900 and is spaced apart from the lower guide rail 800. The upper cam guide rail 100 is movably mounted on the upper guide rail 700, and the lower cam guide rail 200 is fixed to the lower guide rail 800. By setting the upper guide rail 700 and the lower guide rail 800, the upper guide rail 700, the connecting rod 900, and the lower guide rail 800 constitute the frame of the entire preform insertion and unloading mechanism. In the actual assembly process, the preform insertion and unloading mechanism can be assembled into a module first and then installed on the heating frame of the blow molding machine, realizing the modular assembly of the preform insertion and unloading mechanism, which is beneficial to the assembly of the entire blow molding machine. In the embodiments of this application, the connection method between the lower guide rail 800 and the heating frame can be adjusted according to actual needs, and the connection method between the lower guide rail 800 and the heating frame is not limited here. The connection methods between the lower guide rail 800 and the upper guide rail 700 and the connecting rod 900 can also be adjusted according to actual needs, and the connection methods between the lower guide rail 800 and the upper guide rail 700 and the connecting rod 900 are not limited here.

[0044] In some embodiments, the upper cam guide rail 100 includes a blank insertion upper cam guide rail 110 and a blank removal upper cam guide rail 120, and the blank insertion upper cam guide rail 110 and the blank removal upper cam guide rail 120 are spaced apart along a second direction. The blank insertion upper cam guide rail 110 and the blank removal upper cam guide rail 120 are each provided with a cam portion 101. There are two driving members 500, which are respectively provided corresponding to the blank insertion upper cam guide rail 110 and the blank removal upper cam guide rail 120. Compared to using a single drive unit 500, the upper cam guide rail 100 is divided into two parts: the blank insertion upper cam guide rail 110 and the blank removal upper cam guide rail 120. Each of the blank insertion and removal upper cam guide rails 110 and 120 is driven by a separate drive unit 500. This allows for independent adjustment of the working positions of the blank insertion and removal upper cam guide rails 110 and 120 based on any faults that occur during the blank insertion or removal process. In other words, if a fault occurs during blank insertion but the blank removal process is normal, the drive unit 500 moves the blank insertion upper cam guide rail 110 to a standby position, which will not affect the normal operation of the blank removal process. Conversely, if a fault occurs during blank removal but the blank insertion process is normal, the drive unit 500 moves the blank removal upper cam guide rail 120 to a standby position, which will also not affect the normal operation of the blank insertion process.

[0045] In this embodiment, both drive components 500 are cylinders. Of course, in other embodiments of this application, both drive components 500 may also be motor push rods, or one drive component 500 may be a cylinder and the other a motor push rod.

[0046] In some embodiments, the lower cam guide rail 200 includes a blank insertion lower cam guide rail 210 and a blank removal lower cam guide rail 220, which are spaced apart along a second direction. Each of the blank insertion lower cam guide rail 210 and the blank removal lower cam guide rail 220 is provided with a groove portion 201. When the upper cam guide rail 100 includes a blank insertion upper cam guide rail 110 and a blank removal upper cam guide rail 120, the lower cam guide rail 200 is also divided into a blank insertion lower cam guide rail 210 and a blank removal lower cam guide rail 220, which are respectively corresponding to the blank insertion upper cam guide rail 110 and the blank removal upper cam guide rail 120. This facilitates paired processing during manufacturing; that is, the blank insertion upper cam guide rail 110 and the blank insertion lower cam guide rail 210 are processed as a set of corresponding parts, and the blank removal upper cam guide rail 120 and the blank removal lower cam guide rail 220 are processed as a set of corresponding parts.

[0047] As mentioned above, since the lower cam guide rail 200 remains stationary during the process, in an alternative embodiment of this application, the lower cam guide rail 200 can be a one-piece structure without being disassembled.

[0048] The advantages of the blank insertion and removal mechanism in this embodiment are as follows:

[0049] First: The upper cam guide rail 110 for blank insertion and the upper cam guide rail 120 for blank removal are separate structures, as are the lower cam guide rail 210 for blank insertion and the lower cam guide rail 220 for blank removal. This structure offers greater flexibility, allows for tolerance of machining errors in parts, and facilitates the docking and adjustment of various components.

[0050] Second: The combination of the split cam guide rail and the sliding component 400 can meet the accuracy and stability requirements of inserting and unloading blanks at high production rates.

[0051] Third: It avoids the phenomenon of the heating head 10 colliding with the preform when the preform and the heating head 10 are misaligned during the preform insertion process, and avoids the phenomenon of the preform colliding with the preform handling robot due to the asynchronous movement of the turntable 20 and the preform handling robot during the preform unloading process.

[0052] Fourth: The lower guide rail 800, the insert lower cam guide rail 210, and the unload lower cam guide rail 220 do not participate in the insert and unload actions. They play a protective and limiting role to prevent the sliding component 400 from not having enough upward thrust when the elastic element 470 breaks, which would cause the shift fork 600 to collide with the mandrel of the heating head 10.

[0053] Fifth: The tension of the elastic element 470 acts as an upward thrust for the sliding assembly 400 composed of the first slide rod 420 and the second slide rod 430, which allows the sliding assembly 400 to move upward rapidly during operation, and even move upward abruptly. It can be adapted to the rising section curve of the upper cam guide rail 100 with a larger pressure angle, and is well-suited for high-volume blow molding machines.

[0054] This application also discloses a blow molding machine, including the preform insertion / removal mechanism, turntable 20, preform transport mechanism, and preform handling robot described above. The preform insertion / removal mechanism inserts the heating head 10 into the preform transported by the preform transport mechanism and causes the preform to detach from the preform transport mechanism. The turntable 20 moves the preform on the preform insertion / removal mechanism to a position corresponding to the preform handling robot. After the preform insertion / removal mechanism pulls the heating head 10 out of the preform, the preform handling robot can remove the preform. Because of the preform insertion / removal mechanism described above, the phenomenon of the heating head 10 colliding with the preform when misalignment occurs during insertion is avoided. The phenomenon of the preform colliding with the preform handling robot due to asynchronous movement of the turntable 20 and the preform handling robot during unloading is also avoided. This improves the stability and reliability of the blow molding machine, reduces the probability of component damage in case of malfunction, and lowers the scrap rate.

[0055] In the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A preform insertion and unloading mechanism for a blow molding machine, comprising: The upper cam guide rail (100) and the lower cam guide rail (200) are provided. The upper cam guide rail (100) is movably mounted on the heating frame of the blow molding machine along a first direction and is spaced apart from the lower cam guide rail (200). The upper cam guide rail (100) is provided with two cam portions (101) spaced apart along a second direction. The lower cam guide rail (200) is provided with a groove portion (201) corresponding to the cam portions (101). A movable roller (300) is movably mounted between the upper cam guide rail (100) and the lower cam guide rail (200); A sliding assembly (400) is movably mounted on the turntable (20) of the blow molding machine along the first direction. The sliding assembly (400) is connected to the movable roller (300) and connected to the heating head (10) through a fork (600). A driving component (500) is connected to the upper cam guide rail (100) and drives the upper cam guide rail (100) to reciprocate between the working position and the standby position; In the working position, when the upper cam guide rail (100) is in the working position and the turntable (20) drives the sliding assembly (400) to rotate, the cam part (101) can drive the movable roller (300) to move so as to drive the sliding assembly (400) to move along the first direction, so that the heating head (10) can be inserted into or pulled out of the preform.

2. The preform insertion and unloading mechanism of the blow molding machine according to claim 1, wherein, The sliding component (400) includes: A slider (410) is connected to the roller pin (310) of the movable roller (300); The first slide rod (420) passes through the turntable (20) and is connected to the slider (410). One end of the first slide rod (420) is connected to the fork (600). The second slide rod (430) is arranged parallel to the first slide rod (420). The second slide rod (430) passes through the turntable (20) and is connected to the slider (410). One end of the second slide rod (430) is connected to the fork (600).

3. The preform insertion and unloading mechanism of the blow molding machine according to claim 2, wherein, The first slide rod (420) passes through the slider (410) and is locked by a connecting bolt (440), and one end of the first slide rod (420) that passes through the slider (410) is connected to the shift fork (600). The second slide rod (430) passes through the slider (410) and is locked by a fixing pin (450).

4. The preform insertion and unloading mechanism of the blow molding machine according to claim 3, wherein, The second slide bar (430) is provided with a mounting groove (431), which is configured to mount a retaining ring (460), and the retaining ring (460) abuts against the slider (410).

5. The preform insertion and unloading mechanism of the blow molding machine according to claim 2, wherein, The sliding assembly (400) further includes an elastic element (470), which is sleeved on the end of the first slide rod (420) away from the fork (600). One end of the elastic element (470) is fixedly disposed with the first slide rod (420), and the other end abuts against the turntable (20).

6. The preform insertion and unloading mechanism of the blow molding machine according to claim 5, wherein, The other end of the first slide bar (420) is connected to an end cap (480), one end of the elastic member (470) abuts against the end cap (480), and the other end abuts against the turntable (20).

7. The preform insertion and unloading mechanism of the blow molding machine according to claim 2, wherein, A first bearing (30) is provided between the first slide rod (420) and the turntable (20), and a second bearing (40) is provided between the second slide rod (430) and the turntable (20).

8. The preform insertion and unloading mechanism of the blow molding machine according to claim 1, further comprising: An upper guide rail (700) and a lower guide rail (800) are provided. The lower guide rail (800) is fixed to the heating frame. The upper guide rail (700) is connected to the lower guide rail (800) via a connecting rod (900) and is spaced apart from the lower guide rail (800). The upper cam guide rail (100) is movably mounted on the upper guide rail (700), and the lower cam guide rail (200) is fixed to the lower guide rail (800).

9. The preform insertion and unloading mechanism of the blow molding machine according to claim 8, wherein, The upper cam guide rail (100) includes a blank insertion upper cam guide rail (110) and a blank removal upper cam guide rail (120), and the blank insertion upper cam guide rail (110) and the blank removal upper cam guide rail (120) are spaced apart along the second direction. The blank insertion upper cam guide rail (110) and the blank removal upper cam guide rail (120) are each provided with a cam portion (101). The lower cam guide rail (200) includes a blank insertion lower cam guide rail (210) and a blank removal lower cam guide rail (220), and the blank insertion lower cam guide rail (210) and the blank removal lower cam guide rail (220) are spaced apart along the second direction. Each of the blank insertion lower cam guide rail (210) and the blank removal lower cam guide rail (220) is provided with a groove portion (201). There are two drive components (500), which are respectively set on the upper cam guide rail (110) for inserting the blank and the upper cam guide rail (120) for unloading the blank.

10. A blow molding machine, comprising a preform insertion / removal mechanism, a turntable (20), a preform transport mechanism, and a preform handling robot as described in any one of claims 1-9, wherein the preform insertion / removal mechanism is capable of inserting a heating head (10) into a preform transported by the preform transport mechanism and causing the preform to detach from the preform transport mechanism, the turntable (20) is capable of moving the preform on the preform insertion / removal mechanism to a position corresponding to the preform handling robot, and after the preform insertion / removal mechanism pulls out the heating head (10) from the preform, the preform handling robot is capable of moving the preform away.

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