Bottle body blow molding machine

Abstract

The utility model discloses a bottle body blow molding machine which comprises a bottle blowing machine rack, a bottle blank elevator and a running track are connected to the bottle blowing machine rack, a sliding bracket capable of sliding along the running track is connected to the running track in a sliding mode, and at least two bottle blank clamping cylinders extending downwards are installed on the sliding bracket. The lower part of the bottle blank clamping cylinder is provided with a clamping device capable of clamping a bottle mouth part, the bottle blowing machine rack is provided with a blank feeding device, a heating box, a bottle body blow molding and mold closing device and a bottle body taking-out and conveying device which are sequentially arranged along the running track, and the bottle blowing machine rack is provided with a sliding power device capable of driving the sliding bracket to slide. The bottle body blow molding machine can be used for continuous blow molding production of bottle bodies, and has the advantages of low production cost, high bottle body forming quality and high labor efficiency.

Description

Technical Field

[0001] The utility model relates to a bottle blow molding machine. Background Art

[0002] A blow molding machine is a machine that blows preforms into bottles through a blow molding process. The existing blow molding process involves loading the preform, heating it, molding it, and unloading it. In today's mechanized production, robots are used to load the preforms, grasp them for heating, place them into the mold for blow molding, and finally remove them from the mold. This complete robotic operation results in complex electrical control and mechanical design, and low labor efficiency (due to the long single transfer process). Currently, there is no blow molding machine that can continuously blow and form bottles with high efficiency. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a bottle body blow molding machine which can continuously perform blow molding, has high molding quality and high bottle forming efficiency.

[0004] In order to solve the above technical problems, the bottle blow molding machine provided by the utility model includes a bottle blowing machine frame, which is connected to a bottle preform elevator and a running track. Its structural characteristics are: a sliding bracket that can slide along the running track is slidably connected to the running track, and the sliding bracket is equipped with at least two downwardly extending bottle preform clamping cylinders, and the lower part of the bottle preform clamping cylinder is provided with a clamping device that can clamp the bottle mouth. The bottle blowing machine frame is equipped with a blank loading device, a heating box, a bottle blow molding clamping device and a bottle body taking out and conveying device arranged in sequence along the running track, and the bottle blowing machine frame is equipped with a sliding power device that can drive the sliding bracket to slide.

[0005] The clamping device includes a plurality of clamping holes arranged at the lower part of the wall of the bottle preform clamping cylinder and distributed along the cylinder, the clamping holes are equipped with top beads that can be exposed from the inner surface of the cylinder wall, the outer side of the cylinder wall of the bottle preform clamping cylinder is equipped with clamping rings arranged corresponding to the clamping holes, and a clamping top spring is installed between the top beads and the clamping rings.

[0006] The bottle blowing machine frame is equipped with a bottle preform feeding pipe connected to the bottle preform elevator, the bottle blowing machine frame is equipped with a blank taking clamping plate that can slide left and right and is arranged corresponding to the bottle preform feeding pipe, and a blank taking power machine that drives the blank taking clamping plate to slide, the blank taking clamping plate is provided with a slot that can clamp the bottle preform, the bottle blowing machine frame is equipped with a pushing rod that can extend into the slot and push the bottle preform upward to make the bottle preform enter the bottle preform clamping cylinder, and the bottle blowing machine frame is equipped with a blank loading cylinder that drives the pushing rod to slide up and down.

[0007] The bottle blowing machine frame is equipped with a blank supporting cylinder, and the blank supporting cylinder is equipped with a blank supporting plate arranged corresponding to the blank taking clamping plate after rising; the bottle blowing machine frame is connected to the pressing frame, and the pressing cylinder is equipped with a pressing cylinder, and the piston rod of the pressing cylinder is equipped with a pressing cylinder that can press against the top of the bottle blank clamping cylinder.

[0008] The running track includes a straight track section and a curved track section, the heating box is located below the straight track section, the blank loading device and the bottle body blow molding clamping device are respectively located at the two ends of the straight track section, the bottle body taking out and conveying device is located on the curved track section, and the sliding power device includes a straight running power device that drives the sliding bracket to run on the straight track section and a redirecting power device located at the connection between the straight track section and the curved track section. The redirecting power device is a redirecting cylinder connected to the bottle blowing machine frame and capable of pushing the sliding bracket to slide.

[0009] The linear running power device includes two movable drive shafts connected to the bottle blowing machine frame and arranged vertically, the two drive shafts are arranged longitudinally opposite to each other, one of the movable drive shafts is driven by the power of the drive motor, and the two movable drive shafts are correspondingly equipped with drive sprockets, and a rotatable drive chain is covered between the two drive sprockets. The bottle blank clamping cylinder is rotatably connected to the sliding bracket and an outer sprocket is installed on the top of the outer sprocket, and the outer sprocket is driven by the power of a link column extending downward from the drive chain; at least one chain holding plate is installed on the bottle blowing machine frame, and a chain holding platform is provided on the chain holding plate to limit the side of the drive chain.

[0010] The bottle body blow molding mold clamping device includes a forming mold connected to the bottle blowing machine frame, the forming mold consists of a left mold connected to the bottle blowing machine frame, a right mold arranged relative to the left mold and a bottom mold located below the left mold and the right mold, the right mold is slidably connected to the bottle blowing machine frame, the bottle blowing machine frame is equipped with a mold clamping power mechanism for driving the right mold to approach and move away from the left mold, the bottle blowing machine frame is also equipped with a bottom mold power mechanism for driving the bottom mold to slide up and down, the sliding bracket can enter and exit the forming mold, the bottle preform clamped by the bottle preform clamping tube can be located in the mold cavity of the forming mold, the bottle blowing machine frame is equipped with a blowing pipe that can slide vertically and can be connected to an air source, and the lower end of the blowing pipe is equipped with a blowing nozzle that can extend into the bottle preform clamping tube.

[0011] The air blowing pipe is provided with a blowing conversion cylinder, one side of the blowing conversion cylinder is provided with an exhaust pipe, and the other side is provided with an air inlet pipe that can be connected to an air source, and the side wall of the blowing pipe is provided with multiple air inlet holes in a ring cloth, and the air inlet holes can be connected to the air inlet pipe and the exhaust pipe respectively; an annular chamber is provided between the inner wall of the blowing conversion cylinder and the outer wall of the blowing pipe, the air inlet holes on the blowing pipe are located in the annular chamber, and the access ends of the air inlet pipe and the exhaust pipe are also located in the annular chamber; the inlet pipe is respectively connected to a first pressure-charging pipe and a second pressure-charging pipe, and the first pressure-charging pipe and the second pressure-charging pipe are respectively connected to an on-off solenoid valve for controlling the opening and closing of the pipeline and an air source connector for connecting to an air source.

[0012] The cam is connected to the top of the cylinder and the cylinder is connected to the cylinder to push the cylinder to push the cylinder to move upwards and downwards to push the cylinder to move upwards and downwards.

[0013] The bottle blowing machine frame is provided with a bottle pushing rod which is located above the running track and can slide up and down. The lower part of the bottle pushing rod can extend into the bottle preform clamping cylinder and push the bottle out. The bottle blowing machine frame is provided with a bottle lowering cylinder. The piston rod of the bottle lowering cylinder is arranged upward and the piston rod is connected to the bottle lowering plate. The bottle pushing rod is connected to the bottle lowering plate and extends downward. The bottle blowing machine frame is provided with a through hole for the bottle pushing rod to extend out. A bottle lowering power spring is installed between the lower end of the bottle pushing rod and the bottle blowing machine frame. The lower end of the ejection rod is equipped with an ejection sleeve, and the lower part of the bottle ejection rod is equipped with a tapered guide sleeve that gradually increases from bottom to top. The lower bottle power spring is connected between the top surface of the tapered guide sleeve and the bottle blowing machine frame. The bottle picking seat on the bottle blowing machine frame is equipped with two bottle picking plates that are arranged opposite to each other and driven by the bottle picking power machine. The opposite surfaces of the two bottle picking plates are provided with bottle picking grooves that can clamp the bottle body. The bottle picking seat is slidably connected to the bottle blowing machine frame, and the bottle blowing machine frame is equipped with a bottle transport cylinder that drives the bottle picking seat to slide longitudinally.

[0014] With the above structure, the preforms are lifted from the preform elevator and fed into the preform holding cylinder by the preform loading device. The preforms are then clamped by the clamping device, forming a suspended preform conveyor. Driven by the sliding force device, the preforms are heated in the heating box and blown into shape by the bottle blow molding clamping device. Finally, the bottles are removed and transported by the bottle removal and conveying device. Thus, the present invention can automatically load, heat, blow mold, and transport the preforms, achieving continuous production without the need for a separate robot for transport. This greatly simplifies the structure, improves labor efficiency, and ensures high-quality bottle molding.

[0015] In summary, the utility model can realize continuous blow molding production of bottle bodies, and has the advantages of low production cost, high bottle body molding quality and high labor efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] Figure 1 This is a structural diagram of an embodiment of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the structure from a top-down perspective;

[0019] Figure 3 for Figure 1 Schematic diagram of the structure in the left viewing direction;

[0020] Figure 4 for Figure 1 A schematic structural diagram of the running track in the embodiment;

[0021] Figure 5 for Figure 1 A schematic structural diagram of a blank loading device in the embodiment;

[0022] Figure 6 for Figure 5 Schematic diagram of the structure from a top-down perspective;

[0023] Figure 7 for Figure 5 Schematic diagram of the structure in the left viewing direction;

[0024] Figure 8 for Figure 5 Schematic diagram of the three-dimensional structure;

[0025] Figure 9 A schematic diagram of the structure for taking out the preform and pushing it into the preform clamping cylinder;

[0026] Figure 10 It is a structural schematic diagram of the bottle blank clamping cylinder connected to the sliding bracket;

[0027] Figure 11 for Figure 10 Schematic diagram of the enlarged structure of area A

[0028] Figure 12 for Figure 1 A schematic structural diagram of a bottle blow molding clamping device in an embodiment;

[0029] Figure 13 for Figure 12 Schematic diagram of the structure from a top-down perspective;

[0030] Figure 14 for Figure 12 Schematic diagram of the three-dimensional structure;

[0031] Figure 15 It is a schematic diagram of the structure of the blowing pipe and the forming mold in the mold closing state;

[0032] Figure 16 It is a structural diagram of the connection between the air blowing pipe, the air intake pipe and the exhaust pipe;

[0033] Figure 17 for Figure 16 Schematic diagram of the three-dimensional structure;

[0034] Figure 18 This is a schematic diagram of the structure of the bottle during blow molding;

[0035] Figure 19 for Figure 1 A schematic structural diagram of a bottle taking-out and conveying device in an embodiment;

[0036] Figure 20 for Figure 19 Schematic diagram of the structure in which the middle bottle ejector rod is connected to the lower bottle cylinder;

[0037] Figure 21 for Figure 20 Schematic diagram of the three-dimensional structure;

[0038] Figure 22 It is a schematic diagram of the three-dimensional structure of the bottle conveying device;

[0039] Figure 23 for Figure 22 Exploded diagram;

[0040] Figure 24 for Figure 1 A schematic structural diagram of a stretching device in an embodiment;

[0041] Figure 25 for Figure 24 Schematic diagram of the three-dimensional structure of the mid-stretch bracket;

[0042] Figure 26 It is a schematic diagram of the structure of the bottle preform clamping cylinder when stretching the bottle preform. DETAILED DESCRIPTION

[0043] With reference to the accompanying drawings, the present invention provides a bottle blow molding machine. For the convenience of description, the horizontal direction in this embodiment refers to Figure 1 The direction perpendicular to the paper, vertical refers to Figure 1 In the left and right directions of the middle paper, the longitudinal left side is the front of the machine, and the following connection and installation can be understood as direct connection or indirect connection. Indirect connection means that the connection or installation between two components can be carried out through an intermediate component.

[0044] refer to Figures 1 to 3As shown, the bottle blow molding machine provided by the present invention includes a blow molding machine frame 1, to which a preform elevator 13 and a running track 31 are connected, and a sliding bracket 32 ​​that can slide along the running track is slidably connected to the running track 31, and the sliding bracket 32 ​​is equipped with at least two downwardly extending preform clamping cylinders 33, and the lower part of the preform clamping cylinder 33 is provided with a clamping device that can clamp the bottle mouth, and the blow molding machine frame 1 is equipped with a preform loading device, a heating box 30, a bottle blow molding clamping device and a bottle removal and conveying device that are sequentially arranged along the running track, and the blow molding machine frame 1 is equipped with a sliding power device that can drive the sliding bracket 32 ​​to slide. Figure 4 As shown, the running track 31 includes a straight track segment and a curved track segment, the heating box is located below the straight track segment, the blank loading device and the bottle body blow molding clamping device are respectively located at the two ends of the straight track segment, and the bottle body taking out and conveying device is located on the curved track segment, that is, the blank loading device is located at the dotted box Y in the figure, the bottle body blow molding clamping device is located at the dotted box X in the figure, and the bottle body taking out and conveying device is located at the dotted box Z in the figure. The sliding power device includes a straight running power device that drives the sliding bracket 32 ​​to run on the straight track segment and a redirecting power device located at the connection between the straight track segment and the curved track segment. The redirecting power device is a redirecting cylinder 14 connected to the bottle blowing machine frame and capable of pushing the sliding bracket to slide. That is, by sliding the sliding bracket 32 ​​on the running track 31, the processes of loading the bottle blank, heating the bottle blank, blow-molding the bottle blank, and discharging the bottle blank can be continuously realized. On the above-mentioned arc-shaped track section, the sliding can be achieved by relying on the mutual pushing action of two adjacent sliding brackets. Now, the various components of this machine are described in detail with reference to the various drawings.

[0045] refer to Figure 9 and Figure 10As shown, two bottle blank clamping cylinders 33 extending downward are mounted on the sliding bracket 32. A clamping device capable of clamping the bottle mouth is provided at the lower portion of the bottle blank clamping cylinder 33. The clamping device comprises a plurality of clamping holes 34 arranged at the lower portion of the wall of the bottle blank clamping cylinder 33 and distributed along the cylinder wall. A top ball 35 capable of exposing the inner surface of the cylinder wall is mounted in the clamping hole 34. The clamping hole 34 consists of two sections of holes. A section of the clamping hole close to the inner surface of the cylinder wall is a tapered hole, and a section of the clamping hole away from the inner surface of the cylinder wall is a straight hole. The diameter of the straight hole is not less than the diameter of the top ball, the minimum diameter of the tapered hole is less than the diameter of the top ball, and the small hole end of the tapered hole is located on the inner surface of the cylinder wall. A clamping ring 36 corresponding to the clamping hole is mounted on the outer side of the cylinder wall of the bottle blank clamping cylinder 33. The top ball and the clamping ring A clamping top spring 37 is installed between them. The bottle blank can be extended from bottom to top into the bottle blank clamping cylinder 33 under the drive of other power mechanisms (such as the blank loading device). The bottle mouth of the bottle blank will be extended into the bottle mouth, and the outer surface of the bottle mouth will be elastically squeezed by the top bead 35, thereby clamping the bottle blank, so that the entire bottle blank is suspended at the lower part of the bottle blank clamping cylinder 33. When it runs to the bottle body blow molding clamping device, the lower part of the bottle blank will be located in the mold cavity of the forming mold. The advantage of this arrangement is that it can effectively protect the bottle mouth during blow molding of the bottle blank, and the bottle blank is driven by the bottle blank clamping cylinder to run. When it runs to the heating box, the bottle mouth is located in the bottle blank clamping cylinder, so that the lower part of the bottle blank can be completely heated, the bottle mouth is heated the least, the bottle mouth is effectively protected, and the product quality is improved.

[0046] refer to Figures 5 to 10 As shown, the preform loading device provided by the present invention is used to take the preforms out of the conveying pipe and load them into the preform holding cylinder. The preform holding cylinder drives the preforms into the heating box for heating and then conveys them to the bottle body blow molding clamping device of the bottle blowing machine. The bottle blowing machine frame 1 is equipped with a preform feeding pipe 45, and the end of the preform feeding pipe is used to output the preforms. In the drawings of the present invention, only its general structure is schematically shown. Figure 1 and Figure 5 The specific position is indicated in the figure. Various feeding structures such as air feeding or mechanical feeding can be used, and their structures are not described in detail here.

[0047] refer to Figures 5 to 10As shown, the blow molding machine frame 1 is equipped with a blank taking clamping plate 46 that can slide left and right, and the blank taking clamping plate 46 is provided with a clamping groove that can clamp the bottle blank, and two clamping grooves are provided corresponding to the bottle blank holding cylinder 33. The blow molding machine frame 1 is equipped with a blank taking power machine 47 that drives the blank taking clamping plate 46 to slide. In this embodiment, the blank taking power machine 47 is a multi-stroke cylinder. The blow molding machine frame 1 is equipped with a push rod 48 that can extend into the clamping groove and push the bottle blank upward so that the bottle blank enters the bottle blank holding cylinder 33. The blow molding machine frame 1 is equipped with a blank loading cylinder 49 that drives the push rod 48 to slide up and down. The top of the push rod 48 is equipped with a buffer cylinder 55 that can accommodate the bottom of the bottle blank and is used to push the bottle blank. The buffer cylinder 55 can be made of plastic material. Since the lower part of the bottle blank is tubular, the function of the above-mentioned buffer cylinder 55 can prevent the push rod from rigidly pressing the bottom of the bottle blank, thereby effectively protecting the bottle blank. Figure 3 The diagram shows the operation of the push rod 48. To prevent the preform from shaking when entering the preform clamping barrel and to ensure effective clamping, a pressing frame 50 is connected to the blow molding machine frame 1. The pressing frame 50 is equipped with a pressing cylinder 51. The piston rod of the pressing cylinder 51 is equipped with a pressing cylinder 52 that can press against the top of the preform clamping barrel. That is, when the push rod 48 pushes the preform upward to enter the preform clamping barrel 33, the pressing cylinder 51 is activated, causing the pressing cylinder to press against the top of the preform clamping barrel 33.

[0048] refer to Figures 1 to 4 As shown, the blow molding machine frame 1 is equipped with a preform supporting cylinder 53, and the preform supporting cylinder 53 is equipped with a preform supporting plate 54 that is arranged corresponding to the preform removal clamping plate 46 after it is raised. When the push rod 48 pushes the preform upward to enter the preform clamping cylinder 33, this structure can prevent the preform from falling out of the clamping groove of the preform removal clamping plate 46, further ensuring the accuracy of preform loading.

[0049] As shown in the accompanying drawings, when the present invention is in use, preforms are individually fed from the preform feeding pipe 45. The preform removal motor 47 is activated, causing the two clamping grooves to clamp a preform respectively. The preform removal motor is then activated again, causing the preform removal clamping plate 46 to be located below the preform clamping cylinder 33. The preform supporting cylinder 53 is activated, causing the preform supporting plate 54 to rise and face the clamping groove of the preform removal clamping plate 46, thereby protecting the preform in the clamping groove and preventing it from tilting during the loading process. The preform loading cylinder 49 and the pressing cylinder 51 are activated, causing the pressing cylinder 52 to press the top of the preform clamping cylinder 33. The push rod 48 pushes the preform upward to enter the preform clamping cylinder 33. The push rod moves downward and returns to its original position, causing the pressing cylinder to slide upward and return to its original position, causing the preform supporting plate 54 to descend and return to its original position. The preform removal motor is activated, causing the preform removal clamping plate to return to the outlet of the preform feeding pipe 45. Repeating the above cycle can continuously achieve preform removal and loading.

[0050] refer to Figures 1 to 7As shown, a heating box 30 is connected to the bottle blowing machine frame 1, and a heating component is installed in the heating box 30. The heating box 30 is a box body with a bottom plate and side plates. A channel for the bottle preform to run is provided on the top of the box body, that is, the bottle preform can run backward from the above-mentioned channel and can extend into the heating box body from the channel. In this embodiment, the above-mentioned heating component can be a heating lamp connected to the heating box. The heating lamp is not shown in the figure. The heating lamp can be installed in a suspended manner. Its structure is not described in detail here. Of course, the heating component can also be a heating resistance wire or other structure. The heating lamp is located on both sides of the inserted bottle preform, that is, the heating lamp is arranged from front to back and is provided in two rows. The two rows of heating lamps are respectively located on both sides of the lower part of the inserted bottle preform, so that the bottle preform is heated more evenly. A uniformly distributed fan 41 is installed at the bottom of the heating box 30 to form a certain airflow to make the heating more uniform. Of course, the heating box 30 is also equipped with a cooling water assembly, which includes a circulating water pipe, a water pump and other devices. Its specific purpose is to reduce the temperature of the heating box. Its specific cooling structure will not be described in detail here.

[0051] refer to Figures 5 to 9 As shown, the bottle blowing machine frame 1 is equipped with a running track 31 located above the heating box, and the running track 31 is slidably connected to a sliding bracket 32 ​​that can slide along the running track. In this embodiment, combined with Figure 5 As shown, the bottle blowing machine frame 1 is provided with a longitudinally arranged slide groove, and both sides of the sliding bracket 32 ​​have wing plates extending into the slide groove and capable of sliding along the slide groove. Figures 5 to 7 As shown, the linear operation power device includes two movable drive shafts connected to the bottle blowing machine frame 1 and arranged vertically, the two drive shafts are arranged longitudinally opposite to each other, one of the movable drive shafts is driven by a drive motor 38, and a drive sprocket is correspondingly installed on the two movable drive shafts. A rotatable drive chain 39 is covered between the two drive sprockets. The bottle blank clamping cylinder 33 is rotatably connected to the sliding bracket 32 ​​and an outer sprocket 40 is installed on the top of the outer sprocket. The outer sprocket 40 is driven by the link column extending downward from the drive chain 39. Referring to the accompanying drawings, the movable drive shaft extends from top to bottom. The chain links of the above-mentioned drive chain are composed of two chain plates, a chain cylinder located between the two chain plates, and a chain link column passing through the chain plates and the chain cylinder. The chain link column extends downward for a section after passing through the chain plate, and the downwardly extending chain link column can extend into the teeth of the outer sprocket. Figure 6This structure is schematically illustrated in FIG. The sprocket teeth of the drive sprocket extend between two adjacent chain drums, thereby powering the drive chain. As the drive chain rotates, the chain link column drives the outer sprocket, which in turn drives the entire sliding bracket 32 ​​and causes the preform clamping cylinder 33 to rotate, ensuring more uniform heating of the preforms as they pass through the heating box. Due to the certain conveying distance, when the drive chain is long, it is difficult to ensure power transmission between the chain link column and the outer sprocket 40. The blow molding machine frame 1 is equipped with at least one chain retaining plate 42. The chain retaining plate 42 is equipped with a chain retaining platform 43 that limits the side of the drive chain 39. The chain retaining platform ensures the straightness of the drive chain, thereby ensuring the power drive to the outer sprocket 40.

[0052] refer to Figures 12 to 18 As shown, the bottle body blow molding mold clamping device provided by the present invention includes a forming mold 20 connected to the bottle blowing machine frame 1, and the forming mold 20 is composed of a fixed left mold, a right mold arranged relative to the left mold, and a bottom mold located below the left mold and the right mold. A special power mechanism drives the right mold to slide to the left and the bottom mold to slide upward, thereby forming a closed forming mold, and vice versa to achieve mold opening. The specific mold opening and mold clamping structure is described as follows: a bottom mold cylinder 12 is installed on the bottle blowing machine frame, the above-mentioned bottom mold is slidably connected to the bottle blowing machine frame, and the lower power of the bottom mold is connected to the piston rod of the bottom mold cylinder 12, the right mold is slidably connected to the bottle blowing machine frame, and the bottle blowing machine frame is equipped with a driving mechanism to drive the right mold close to and away from the left mold. The mold clamping power mechanism is also equipped on the bottle blowing machine frame with a bottom mold power mechanism that drives the bottom mold to slide up and down. The mold clamping power mechanism includes a linkage seat 5 slidably connected to the bottle blowing machine frame 1. The lower part of the linkage seat is equipped with a mold clamping cylinder 2, and the upper part is equipped with a tensioning rod 3 that can slide vertically. The lower end of the tensioning rod 3 is dynamically connected to the piston rod of the mold clamping cylinder 2. At least one combined mold connecting rod 4 is hinged on the tensioning rod 3. A combined mold connecting rod includes two linkage rods extending to both sides respectively. The linkage rod on the right is hinged on the bottle blowing machine frame, and the linkage rod on the left is hinged on the right mold. When the mold clamping cylinder 2 is actuated, the tensioning rod 3 is pulled to slide downward, and the two linkage rods gradually become horizontal. At this time, the linkage seat slides to the left ( Figure 12The left side of the figure) and pushes the right mold to slide to the left. The self-locking function of the linkage rod achieves mechanical mold locking (the state shown in the figure), preventing loose mold clamping caused by the difference in air pressure. When the mold needs to be opened, the mold clamping cylinder is activated, causing the tensioning rod to slide upward, and the two linkage rods are bent, thereby pulling the right mold to slide to the right. The blow molding machine frame 1 is equipped with an elastic pressure device that can elastically prevent the left mold from sliding. The elastic pressure device includes a pressure column 6 connected to the blow molding machine frame 1. The left mold is connected to the blow molding machine frame via a guide column. The pressure column 6 is screwed to the blow molding machine frame. A pressure spring 7 is installed between the pressure column and the blow molding machine frame. The blow molding machine frame 1 is equipped with an air pressure ejector 8. The air inlet end of the air pressure ejector 8 can be connected to the air source, and the outlet end of the air pressure ejector 8 is against the left wall of the left mold. Since gas with a certain pressure is rushed into the mold cavity of the forming mold during the blow molding process, in order to prevent the left mold from vibrating, a certain pre-pressure is given to the left mold by the above-mentioned top pressure spring 7, thereby offsetting the gas pressure it is subjected to; and in the utility model, a process of twice punching gas (twice blowing) is adopted, so the above-mentioned air pressure top cylinder is provided. In the case of low-pressure blow molding, the above-mentioned air pressure top cylinder may not rush in high-pressure gas, and in the case of high-pressure blow molding, the air pressure top cylinder may rush in high-pressure gas. The air pressure top cylinder and the above-mentioned top pressure spring 7 together offset the pressure of the high-pressure gas on the left mold, thereby ensuring that the forming mold will not have leakage problems and improving the molding quality of the bottle body.

[0053] refer to Figures 12 to 15 As shown, the blow molding machine frame 1 is equipped with a balancing device that enables the right mold to slide smoothly and maintain linear operation. The balancing device includes a balancing shaft 9 rotatably connected to the blow molding machine frame 1. The balancing shaft 9 is equipped with a balancing gear 10. The blow molding machine frame 1 is equipped with a bottom balancing rack that meshes with the balancing gear. Upper balancing racks 11 that mesh with the balancing gears 10 are respectively installed on both sides of the right mold. During the power-driven mold closing process, the right mold drives the upper balancing racks to slide. Under the meshing of the balancing gears, the movement distance of the two sides is completely synchronized, thereby ensuring the sliding stability of the right mold and ensuring that the right and left molds are fully aligned, further ensuring the molding quality of the bottle body.

[0054] refer to Figures 15 to 18As shown, the blow molding machine frame 1 is equipped with a blow pipe 21 that can slide vertically. Specifically, the blow molding machine frame 1 is connected to a blow power cylinder 211, and the piston rod of the blow power cylinder 211 is connected to the blow pipe, thereby driving the blow pipe 21 to slide up and down. The lower end of the blow pipe 21 is equipped with a blow nozzle 22 that can be inserted into the bottle blank clamping cylinder 33. The blow pipe 21 is sheathed with a blow conversion cylinder 23. The blow conversion cylinder 23 is equipped with an exhaust pipe 24 on one side and an inlet pipe 26 that can be connected to the air source on the other side. The air pipe 25, the side wall of the blowing pipe 21 is provided with a plurality of air inlet holes in a ring cloth, and the air inlet holes can be respectively connected to the air inlet pipe and the exhaust pipe. Specifically, an annular chamber 231 is provided between the inner wall of the blowing conversion cylinder 23 and the outer wall of the blowing pipe. The air inlet holes on the blowing pipe 21 are located in the annular chamber, and the access ends of the air inlet pipe and the exhaust pipe are also located in the annular chamber. When blow molding is required, the gas enters the annular chamber after entering from the air inlet pipe, and then is discharged into the blowing pipe through the air inlet holes and blown out by the blow nozzle. If blow molding is performed at high pressure once, the quality of the bottle body molding is difficult to guarantee. Therefore, in the present invention, the air inlet pipe 25 is respectively connected to a first pressure-charging pipe 26 and a second pressure-charging pipe 27. The first pressure-charging pipe 26 and the second pressure-charging pipe 27 are respectively connected to an on-off solenoid valve 28 for controlling the opening and closing of the pipe and an air source connector 29 for connecting an air source. The first pressure-charging pipe 26 can be flushed with high-pressure gas, and the second pressure-charging pipe 27 can be flushed with low-pressure gas. When the blow molding process is carried out, the on-off solenoid valve on the second pressure-charging pipe 27 is first opened, and the on-off solenoid valve on the first pressure-charging pipe is closed. The low-pressure gas entering the second pressure-charging pipe 27 enters the blowing pipe 21, thereby blow molding the bottle blank. After the first blow molding is completed, the on-off solenoid valve on the second pressure-charging pipe is closed, and the on-off solenoid valve on the first pressure-charging pipe is opened. The high-pressure gas in the first pressure-charging pipe is used for secondary blow molding, thereby ensuring the molding quality of the bottle body. During each blow molding process, pressurized gas is discharged from an exhaust pipe. The exhaust pipe 24 is equipped with an exhaust solenoid valve 30, and the end of the exhaust pipe is equipped with a muffler 301. The nozzle 22 includes a nozzle body, the outer wall of which is equipped with an outer sealing ring 221. The inner wall of the nozzle body is provided with multiple vertical ribs arranged along the nozzle body, forming a flow channel between adjacent ribs. This structure can form a flow guide, further ensuring the molding quality of the bottle body.

[0055] refer to Figures 24 to 26Before the bottle body blow molding clamping device begins blow molding, the preform is stretched to ensure the quality of the bottle body. A stretching device is mounted on the blow molding machine frame. The stretching device has the following specific structure: The blow molding machine frame 1 is mounted with a stretching bracket 60 located above the running track. The stretching bracket 60 is mounted with a vertically slidable stretching plate 61. The stretching bracket 60 is rotatably connected to a stretching screw 62 driven by a stretching power machine. The stretching plate 61 is rotatably connected to a stretching nut 63 threaded onto the stretching screw 62. The stretching plate 61 is mounted with a stretching rod 64 extending downward and capable of extending into the preform clamping barrel. The stretching power machine 75 is a servo motor connected to the blow molding machine frame. A driving synchronous pulley 67 is mounted on the servo motor's power output shaft. The stretching screw 62 is mounted with a driven synchronous pulley 68. A timing belt 69 is installed between the driving and driven synchronous pulleys. This structure effectively controls the descent distance and speed of the stretch rod 64, thereby ensuring preform stretching quality and preventing the stretch rod from penetrating the preform. The stretching bracket 60 is equipped with a stretching guide plate 65, which is equipped with a stretching guide sleeve 66 for the stretch rod 64 to pass through. The stretching bracket 60 is also equipped with four parallel stretching guide posts 70. The stretching plate 61 is provided with guide holes for the stretching guide posts 70 to pass through, allowing the stretching plate to slide up and down along the stretching guide posts. These guide holes are equipped with sliding guide sleeves 71 that slidably engage with the stretching guide posts. This structure effectively ensures smooth up and down sliding of the stretching plate and stretch rod, thereby ensuring preform stretching quality.

[0056] Combine Figure 22 and Figure 26 As shown, when in use, the preform clamping cylinder 33 clamps the preform. At this time, the preform has been heated, the stretching power machine is activated, the stretching screw rotates to make the stretching plate 61 descend, and the descent of the stretching plate 61 drives the stretching rod 64 to descend. The stretching rod 64 penetrates the preform clamping cylinder 33 and extends into the preform, and continues to descend. The stretching rod 64 pushes the bottom of the preform to stretch the preform. After stretching a certain distance, the stretching power machine reverses its action, thereby retracting the stretching rod, completing the stretching of a preform. After the preform is stretched, the blow molding process can be carried out immediately.

[0057] refer to Figure 19 and Figure 22As shown, the bottle removal and conveying device provided by the present invention comprises a bottle ejection rod 76 mounted on the blow molding machine frame 1, which is positioned above the running track and can slide up and down. The lower portion of the bottle ejection rod can extend into the preform clamping cylinder and eject the bottle. The blow molding machine frame 1 is mounted with a bottle lowering cylinder 77, whose piston rod is upwardly disposed and connected to a bottle lowering plate 78. The bottle ejection rod 76 is connected to the bottle lowering plate 78 and extends downward. The blow molding machine frame 1 is provided with a through hole for the bottle ejection rod to extend. A bottle lowering power spring 79 is mounted between the lower end of the bottle ejection rod 76 and the blow molding machine frame 1. The lower end of the bottle ejection rod 76 is mounted with an ejection sleeve 80, and the lower portion of the bottle ejection rod is mounted with a tapered guide sleeve 81 that gradually increases in size from bottom to top. The bottle lowering power spring 79 is connected between the top surface of the tapered guide sleeve 81 and the blow molding machine frame 1. When the bottle is located below the bottle ejection rod 76 under the clamping movement of the bottle blank clamping cylinder, the lower bottle cylinder 77 is activated (deflation process), and the bottle ejection rod 76 moves downward and extends into the bottle blank clamping cylinder under the power of the lower bottle power spring 79, thereby pushing the bottle out. After the ejection is completed, the lower bottle cylinder is activated (high-pressure gas is injected), and the bottle ejection rod 76 moves back to its original position. The above-mentioned structure can avoid rigid top pressure (spring top pressure) when the bottle is pushed out, which can effectively protect the bottle mouth. In addition, the configuration of the tapered guide sleeve 81 and the ejection sleeve can further ensure the quality of the ejected bottle.

[0058] refer to Figure 19 、 Figure 22 and Figure 23 As shown, the blow molding machine frame 1 is also equipped with a bottle transport device located below the running track and capable of catching and transporting bottles. The bottle transport device includes a bottle picker 82 connected to the blow molding machine frame 1. The bottle picker 82 is equipped with two bottle picker plates 83 arranged opposite each other and driven by a bottle picker motor. The two bottle picker plates have bottle picker grooves on their opposing surfaces for holding bottles. In this embodiment, the bottle picker plates 83 are composed of vertical plates and horizontal plates. The two horizontal plates are arranged opposite each other and extend toward each other. The bottle picker grooves are provided on the horizontal plates. The bottle picker motor is a bottle picker cylinder 86 connected to the bottle picker 82. When the bottle picker cylinder 86 is activated (the bottle lowering cylinder is activated, pushing the bottle from the preform clamping cylinder), the two bottle picker plates move toward each other (i.e., move closer together), and the bottle is stuck in the two opposing bottle picker grooves. One of the bottle picker plates 83 is equipped with a bottle support plate 85. The bottle retrieval seat 82 is slidably connected to the bottle blowing machine frame 1. A bottle transport cylinder 84 is mounted on the bottle blowing machine frame 1 to drive the bottle retrieval seat 82 to slide longitudinally. After the bottle retrieval plate clamps the bottle, the bottle transport cylinder is activated to transport the bottle to the appropriate location. The bottle retrieval cylinder then reverses to release the bottle. After the bottle is transferred, the bottle transport cylinder returns the components to their original positions.

[0059] The present invention is not limited to the above embodiments. For those skilled in the art, equivalent changes and component replacements based on the specific structure of the present invention are all within the protection scope of the present invention.

Claims

1. A bottle blow molding machine, comprising a blow molding machine frame (1), to which a preform elevator (13) and a running track (31) are connected, characterized in that: The running track (31) is slidably connected to a sliding bracket (32) capable of sliding along the running track. The sliding bracket (32) is equipped with at least two bottle blank clamping cylinders (33) extending downward. The lower part of the bottle blank clamping cylinder (33) is provided with a clamping device capable of clamping the bottle mouth. The bottle blowing machine frame (1) is equipped with a blank loading device, a heating box (30), a bottle body blow molding clamping device and a bottle body taking out and conveying device arranged in sequence along the running track. The bottle blowing machine frame (1) is equipped with a sliding power device capable of driving the sliding bracket (32) to slide.

2. The bottle blow molding machine according to claim 1, characterized in that: The clamping device comprises a plurality of clamping holes (34) arranged at the lower portion of the wall of the bottle blank clamping cylinder (33) and distributed along the same, wherein top beads (35) capable of being exposed to the inner surface of the cylinder wall are installed in the clamping holes (34), and clamping ring clamps (36) arranged corresponding to the clamping holes are installed on the outer side of the cylinder wall of the bottle blank clamping cylinder (33), and a clamping top spring (37) is installed between the top beads and the clamping ring clamp.

3. The bottle blow molding machine according to claim 1, characterized in that: The blow molding machine frame (1) is provided with a bottle blank feeding pipe (45) connected to the bottle blank elevator, the blow molding machine frame (1) is provided with a blank taking clamping plate (46) that can slide left and right and is provided corresponding to the bottle blank feeding pipe, and a blank taking power machine (47) that drives the blank taking clamping plate (46) to slide, the blank taking clamping plate (46) is provided with a clamping groove that can clamp the bottle blank, the blow molding machine frame (1) is provided with a push rod (48) that can extend into the clamping groove and push the bottle blank upward so that the bottle blank enters the bottle blank clamping cylinder, and the blow molding machine frame (1) is provided with a blank loading cylinder (49) that drives the push rod (48) to slide up and down.

4. The bottle blow molding machine according to claim 3, characterized in that: The blow molding machine frame (1) is equipped with a blank supporting cylinder (53), and the blank supporting cylinder (53) is equipped with a blank supporting plate (54) arranged corresponding to the blank taking clamping plate (46) after rising; the blow molding machine frame (1) is connected to a pressing frame (50), and the pressing frame (50) is equipped with a pressing cylinder (51), and the piston rod of the pressing cylinder (51) is equipped with a pressing cylinder (52) capable of pressing against the top of the bottle blank clamping cylinder.

5. The bottle blow molding machine according to any one of claims 1 to 4, characterized in that: The running track (31) includes a straight track section and an arc track section, the heating box is located below the straight track section, the blank loading device and the bottle body blow molding clamping device are respectively located at the two ends of the straight track section, the bottle body taking out and conveying device is located on the arc track section, and the sliding power device includes a straight running power device that drives the sliding bracket (32) to run on the straight track section and a redirecting power device located at the connection between the straight track section and the arc track section, and the redirecting power device is a redirecting cylinder (14) connected to the bottle blowing machine frame and capable of pushing the sliding bracket to slide.

6. The bottle blow molding machine according to claim 5, characterized in that: The linear operation power device includes two movable drive shafts connected to the bottle blowing machine frame (1) and arranged vertically, the two drive shafts are arranged longitudinally opposite to each other, one of the movable drive shafts is driven by the power of the drive motor (38), the two movable drive shafts are correspondingly equipped with drive sprockets, and a rotatable drive chain (39) is wrapped between the two drive sprockets. The bottle blank holding cylinder (33) is rotatably connected to the sliding bracket (32) and an outer sprocket (40) is installed on the top of the outer sprocket. The outer sprocket (40) is driven by the power of a link column extending downward from the drive chain (39); at least one chain holding plate (42) is installed on the bottle blowing machine frame (1), and a chain holding platform (43) is provided on the chain holding plate (42) for limiting the side of the drive chain (39).

7. The bottle blow molding machine according to claim 5, characterized in that: The bottle body blow molding clamping device comprises a forming mold (20) connected to a bottle blowing machine frame (1), the forming mold (20) comprises a left mold connected to the bottle blowing machine frame (1), a right mold arranged relative to the left mold, and a bottom mold located below the left mold and the right mold, the right mold being slidably connected to the bottle blowing machine frame, the bottle blowing machine frame being equipped with a clamping power mechanism for driving the right mold to approach and move away from the left mold, the bottle blowing machine frame being further equipped with a bottom mold power mechanism for driving the bottom mold to slide up and down, the sliding bracket (32) being able to enter and exit the forming mold, the bottle preform clamped by the bottle preform clamping cylinder (33) being able to be located in the mold cavity of the forming mold, the bottle blowing machine frame (1) being equipped with a blow pipe (21) capable of vertical sliding and being connected to an air source, the lower end of the blow pipe (21) being equipped with a blow nozzle (22) capable of extending into the bottle preform clamping cylinder (33).

8. The bottle blow molding machine according to claim 7, characterized in that: The blowing pipe (21) is provided with a blowing conversion cylinder (23), one side of the blowing conversion cylinder (23) is provided with an exhaust pipe (24), and the other side is provided with an intake pipe (25) that can be connected to an air source, and a plurality of air intake holes arranged in a ring pattern are provided on the side wall of the blowing pipe (21), and the air intake holes can be respectively connected to the intake pipe and the exhaust pipe; an annular chamber (231) is provided between the inner wall of the blowing conversion cylinder (23) and the outer wall of the blowing pipe, the air intake holes on the blowing pipe (21) are located in the annular chamber, and the access ends of the intake pipe and the exhaust pipe are also located in the annular chamber; the intake pipe (25) is respectively connected to a first pressure-charging pipe (26) and a second pressure-charging pipe (27), and the first pressure-charging pipe (26) and the second pressure-charging pipe (27) are respectively connected to an on-off solenoid valve (28) for controlling the opening and closing of the pipes and an air source connector (29) for connecting to an air source.

9. The bottle blow molding machine according to claim 7, characterized in that: The mold clamping power mechanism comprises a linkage seat (5) slidably connected to the bottle blowing machine frame (1), a mold clamping cylinder (2) is mounted on the lower part of the linkage seat, and a tensioning rod (3) capable of vertical sliding is mounted on the upper part, the lower end of the tensioning rod (3) is dynamically connected to the piston rod of the mold clamping cylinder (2), and at least one combined mold connecting rod (4) is hinged on the tensioning rod (3), and a combined mold connecting rod comprises two linkage rods extending to both sides, the right linkage rod is hinged to the bottle blowing machine frame, and the left linkage rod is hinged to the right mold, and the blow molding machine frame is connected to the right mold. An elastic pressure device capable of elastically preventing the left mold from sliding is installed on the bottle blowing machine frame (1); the elastic pressure device comprises a top pressure column (6) connected to the bottle blowing machine frame (1); the left mold is connected to the bottle blowing machine frame through a guide column; the top pressure column (6) is screwed to the bottle blowing machine frame; a top pressure spring (7) is installed between the top pressure column and the bottle blowing machine frame; an air pressure top cylinder (8) is installed on the bottle blowing machine frame (1); the air inlet end of the left side of the air pressure top cylinder (8) can be connected to an air source, and the outlet end of the right side presses against the left side wall of the left mold.

10. The bottle blow molding machine according to claim 5, characterized in that: The bottle blowing machine frame (1) is provided with a bottle ejection rod (76) located above the running track and capable of sliding up and down. The lower part of the bottle ejection rod can extend into the bottle blank clamping cylinder and push the bottle out. The bottle blowing machine frame (1) is provided with a bottle lowering cylinder (77). The piston rod of the bottle lowering cylinder is arranged upward and the piston rod is connected to a bottle lowering plate (78). The bottle ejection rod (76) is connected to the bottle lowering plate (78) and extends downward. The bottle blowing machine frame (1) is provided with a through hole for the bottle ejection rod to extend. A bottle lowering power spring (79) is installed between the lower end of the bottle ejection rod (76) and the bottle blowing machine frame (1). The lower end is provided with an ejection sleeve (80), the lower part of the bottle ejection rod is provided with a tapered guide sleeve (81) which gradually increases from bottom to top, the lower bottle power spring (79) is connected between the top surface of the tapered guide sleeve (81) and the bottle blowing machine frame (1), the bottle picking seat (82) on the bottle blowing machine frame (1) is provided with two bottle picking plates (83) which are arranged opposite to each other and driven by the bottle picking power machine, the opposite surfaces of the two bottle picking plates are provided with bottle picking grooves which can clamp the bottle body, the bottle picking seat (82) is slidably connected to the bottle blowing machine frame (1), and the bottle blowing machine frame (1) is provided with a bottle transport cylinder (84) which drives the bottle picking seat (82) to slide longitudinally.

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