Plastic container blow molding device

Abstract

The present invention relates to the technical field of blow molding, and in particular to a blow molding device for plastic containers, which improves the efficiency of blow molding; it includes a mounting base, a driving mold, a driven mold, a fixing plate, a threaded rod, a transmission member, a fixing seat, a connecting shaft and a driving mechanism, two groups of driven molds are slidably mounted on the mounting base, the two groups of driven molds are symmetrically mounted together, two groups of fixing seats are symmetrically mounted at both ends of the driving mold, the two ends of the connecting shaft are respectively connected with the fixing seats on the two groups of driving molds, the two groups of driving molds are respectively located at the two ends of the two groups of driven molds, multiple groups of mold cavities are provided on the driving mold and the driven mold, and the multiple groups of mold cavities are symmetrically arranged at the two ends of the two groups of driving molds and the driven mold, the fixing plate is mounted on the mounting base, the two groups of threaded rods are rotatably mounted on the fixing plate, the two groups of transmission members are symmetrically mounted on one group of driving molds, the threaded rods are connected with the threaded holes of the transmission members, and the driving mechanism is mounted on the mounting base and connected with the two groups of threaded rods.

Description

Technical Field

[0001] The present invention relates to the technical field of blow molding, in particular to a blow molding device for a plastic container. Background Art

[0002] Also known as hollow blow molding, this is a rapidly developing plastics processing method. Blow molding began to be used during World War II to produce small bottles of low-density polyethylene. In the late 1950s, with the advent of high-density polyethylene and the development of blow molding machines, blow molding technology gained widespread application. Hollow containers can reach volumes of several thousand liters, and some production processes are computer-controlled. Plastics suitable for blow molding include polyethylene, polyvinyl chloride, polypropylene, and polyester, and the resulting hollow containers are widely used as industrial packaging containers. Based on the method used to make the parison, blow molding can be divided into extrusion blow molding and injection blow molding. Newer developments include multilayer blow molding and stretch blow molding.

[0003] There are two existing technologies

[0004] 1) Blow molding at the top, low output, each blow needle can only blow one bottle at a time;

[0005] 2) The mold has a blow needle. After the mold is closed, the blow needle is ejected, air is blown, and the product is formed. It is top-to-top. Each blow needle can blow two bottles at a time, and the output is high. The disadvantage is that the blow needle is frequently stuck due to the use of air pressure to control the blow needle, and the puncture failure phenomenon often occurs, which greatly reduces the yield rate. Summary of the Invention

[0006] The main purpose of the present invention is to provide a plastic container blow molding device, thereby effectively solving the problems pointed out in the background technology.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A plastic container blow molding device includes a mounting base, a driving mold, a driven mold, a fixed plate, a threaded rod, a transmission member, a fixed seat, a connecting shaft and a driving mechanism. Two groups of driven molds are slidably mounted on the mounting base, and the two groups of driven molds are symmetrically mounted together. Two groups of fixed seats are symmetrically mounted at both ends of the driving mold, and the two ends of the connecting shaft are respectively connected with the fixed seats on the two groups of driving molds. The two groups of driving molds are respectively located at both ends of the two groups of driven molds. Multiple groups of mold cavities are provided on the driving mold and the driven mold, and the multiple groups of mold cavities are symmetrically arranged at both ends of the two groups of driving molds and the driven mold. The positions of the multiple groups of driving molds and the driven mold cavities are correspondingly arranged. The fixed plate is mounted on the mounting base, and the two groups of threaded rods are rotatably mounted on the fixed plate. The two groups of transmission members are symmetrically mounted on one group of driving molds, and the threaded rods are connected with the threaded holes of the transmission members. The driving mechanism is mounted on the mounting base and connected with the two groups of threaded rods.

[0009] Furthermore, the driving mechanism includes a first servo motor, a driving sprocket, a driven sprocket and a chain. The first servo motor is installed on a mounting base, the driving sprocket is coaxially installed on the output end of the first servo motor, the driven sprocket is coaxially installed on the threaded rod, and the chain is respectively engaged with the two sets of driven sprockets and the driving sprocket for transmission.

[0010] Furthermore, it also includes a transmission rod and a limit seat. The two groups of transmission rods are symmetrically installed at the two ends of the two groups of driven molds. Two groups of limit seats are respectively installed at both ends of the driven molds. The two groups of limit seats located on the same side of the driven mold are symmetrically installed, and the transmission rods are cooperatively connected with the limit seats.

[0011] Furthermore, it also includes positioning sleeves, and two groups of positioning sleeves are symmetrically installed at both ends of the two groups of driven molds, and the connecting shaft is slidably connected with the shaft hole of the positioning sleeve.

[0012] Furthermore, it also includes a support frame, a driving rod, a mounting beam, a blow needle and a power mechanism. The support frames at both ends are symmetrically installed at both ends of the driven mold. External threads are respectively provided at both ends of the driving rod. The external threads at both ends of the driving rod have opposite screw directions. The driving rod is rotatably installed on the support frame. Two groups of mounting beams are respectively threadedly installed at both ends of the driving rod. Multiple groups of blow needles are installed on the mounting beams. The number of blow needles is the same as the number of mold cavities of the driving mold and the driven mold and corresponds one to one. The power mechanism is installed on the support frame and connected to the driving rod.

[0013] Furthermore, the power mechanism includes a transmission worm gear, a support shaft, a transmission worm and a second servo motor. The transmission worm gear is coaxially installed on the drive rod, the support shaft is rotatably installed on the support frame, the transmission worm gear is coaxially installed on the support shaft, the transmission worm gear is meshingly connected to the transmission worm gear, the second servo motor is installed on the support frame, and the output end of the second servo motor is coaxially connected to the support shaft.

[0014] Furthermore, it also includes support legs, multiple groups of support legs are cooperatively installed on the installation base, and the bottom ends of the support legs are provided with adjustment feet.

[0015] Furthermore, damping pads are provided at the connection between the mounting base and the two sets of driven dies.

[0016] Furthermore, it also includes a protection box, which is installed on the installation base, and the chain and two sets of driven sprockets are located in the center of the inner cavity of the protection box.

[0017] After adopting the above technical scheme, the beneficial effects of the present invention are as follows: the two groups of driven molds are positioned and slidably supported by the mounting base, the preform is shaped during blow molding by cooperating with the driving mold and the driven mold, and the two groups of driving molds and the driven mold are set so that one group of the device is blow-molded on the other side and adds preforms and demolds the blow-molded parts, the two groups of driving molds are matched and connected by the fixing base and the connecting shaft, the two groups of driving molds are connected and moved synchronously so that the device is driven synchronously, the driven mold is slidably connected to the mounting base so that the blow molding process is conveniently alternated in the two groups of driving molds and the driven mold, the two groups of threaded rods are rotatably supported on the mounting base by the fixing plate, the driving mold is stably supported on the mounting base by cooperating with the threaded rod and the transmission member, the threaded rod provides rotational power by cooperating with the driving mechanism and the threaded rod, and the positions of the two groups of driving molds and the two groups of driven molds are adjusted forward by cooperating with the transmission member to improve the blow molding processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a front view structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0021] Figure 3 It is a left-side structural schematic diagram of the present invention;

[0022] Figure 4 It is a schematic diagram of the shaft side mechanism of the present invention;

[0023] Markings in the accompanying drawings: 1. Mounting base; 2. Driving mold; 3. Driven mold; 4. Fixed plate; 5. Threaded rod; 6. Transmission member; 7. Fixed seat; 8. Connecting shaft; 9. First servo motor; 10. Driving sprocket; 11. Driven sprocket; 12. Chain; 13. Transmission rod; 14. Limit seat; 15. Positioning sleeve; 16. Support frame; 17. Driving rod; 18. Mounting beam; 19. Blow needle; 20. Transmission worm gear; 21. Support shaft; 22. Transmission worm; 23. Second servo motor; 24. Support leg; 25. Damping pad; 26. Protective box. DETAILED DESCRIPTION

[0024] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0025] The plastic container blow molding device of the present invention has common mechanical installation, connection or setting methods for all the components mentioned above, and the specific structures, models and coefficient indicators of all its components are its own technology. As long as it can achieve its beneficial effects, it can be implemented, so it will not be elaborated on.

[0026] For the plastic container blow molding device of the present invention, unless otherwise specified, the directional words contained in the terms "up, down, left, right, front, back, inside, outside, vertical, horizontal" only represent the orientation of the term in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term. At the same time, number series nouns such as "first", "second" and "third" do not represent specific quantities and orders, but are merely used to distinguish names. Moreover, the terms "include", "comprise" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0027] like Figures 1 to 4 As shown, a plastic container blow molding device includes a mounting base 1, a driving mold 2, a driven mold 3, a fixing plate 4, a threaded rod 5, a transmission member 6, a fixing seat 7, a connecting shaft 8 and a driving mechanism. Two groups of driven molds 3 are slidably mounted on the mounting base 1, and the two groups of driven molds 3 are symmetrically mounted together. Two groups of fixing seats 7 are symmetrically mounted at both ends of the driving mold 2, and both ends of the connecting shaft 8 are respectively connected with the fixing seats 7 on the two groups of driving molds 2. The two groups of driving molds 2 are respectively located at both ends of the two groups of driven molds 3. Multiple groups of mold cavities are provided on the driving mold 2 and the driven mold 3, and the multiple groups of mold cavities are symmetrically arranged at both ends of the two groups of driving molds 2 and the driven mold 3. The positions of the mold cavities of the multiple groups of driving molds 2 and the driven mold 3 are correspondingly arranged. The fixing plate 4 is mounted on the mounting base 1, two groups of threaded rods 5 are rotatably mounted on the fixing plate 4, two groups of transmission members 6 are symmetrically mounted on one group of driving molds 2, the threaded rods 5 are connected with the threaded holes of the transmission members 6, and the driving mechanism is mounted on the mounting base 1 and connected with the two groups of threaded rods 5.

[0028] The cam 21 is provided with a plurality of driving dies 2 and a plurality of driven dies 3, and the driving dies 2 and the driven dies 3 are provided with a plurality of driving dies 2 and a plurality of driven dies 3. The driving dies 2 and the driven dies 3 are provided with a plurality of driving dies 2 and a plurality of driven dies 3. The driving dies 2 and the driven dies 3 are provided with a plurality of driving dies 2 and a plurality of driven dies 3.

[0029] As a preferred embodiment of the above, the driving mechanism includes a first servo motor 9, a driving sprocket 10, a driven sprocket 11 and a chain 12. The first servo motor 9 is mounted on the mounting base 1, the driving sprocket 10 is coaxially mounted on the output end of the first servo motor 9, the driven sprocket 11 is coaxially mounted on the threaded rod 5, and the chain 12 is respectively meshed with the two sets of driven sprockets 11 and the driving sprocket 10.

[0030] During use, the chain 12 cooperates with the driving sprocket 10 and the two sets of driven sprockets 11 respectively to connect the first servo motor 9 with the two sets of threaded rods 5. The first servo motor 9 provides rotational power to the two sets of threaded rods 5. The two sets of threaded rods 5 rotate and cooperate with the transmission parts 6 to control the two sets of driving molds 2 and driven molds 3 respectively and adjust their positions relatively, thereby improving the convenience of device operation.

[0031] As a preferred embodiment of the above, it further includes a transmission rod 13 and a limit seat 14, two sets of transmission rods 13 are symmetrically installed at both ends of the two sets of driven molds 3, and two sets of limit seats 14 are respectively installed at both ends of the driven molds 3. The two sets of limit seats 14 located on the same side of the driven mold 3 are symmetrically installed, and the transmission rods 13 are cooperatively connected with the limit seats 14;

[0032] During use, the transmission rod 13 and the limit seat 14 cooperate to limit the sliding connection area between the two groups of driven molds 3 and the mounting base 1. At the same time, the transmission rod 13 and the limit seat 14 cooperate to increase the connection strength between the driving mold 2 and the driven mold 3, thereby improving the stability of the combined mold cavity of the device and increasing the blow molding quality.

[0033] As a preferred embodiment of the above embodiment, it further includes positioning sleeves 15, two sets of positioning sleeves 15 are symmetrically mounted at both ends of the two sets of driven molds 3, and the connecting shaft 8 is slidably connected with the shaft hole of the positioning sleeve 15;

[0034] During use, the two sets of driving molds 2 and the two sets of driven molds 3 are limited by the relative sliding trajectory through the sliding connection between the positioning sleeve 15 and the connecting shaft 8, thereby improving the connection accuracy between the driving mold 2 and the driven mold 3 and increasing the blow molding quality of the device.

[0035] As a preferred embodiment of the above embodiment, it also includes a support frame 16, a driving rod 17, a mounting beam 18, a blow pin 19 and a power mechanism, the support frames 16 at both ends are symmetrically mounted on both ends of the driven mold 3, the driving rod 17 is provided with external threads at both ends, the external threads at both ends of the driving rod 17 are screwed in opposite directions, the driving rod 17 is rotatably mounted on the support frame 16, the driving rod 17 is threadedly mounted with two groups of mounting beams 18 at both ends, and multiple groups of blow pins 19 are mounted on the mounting beams 18, the number of blow pins 19 is the same as the number of mold cavities of the driving mold 2 and the driven mold 3 and corresponds one to one, the power mechanism is mounted on the support frame 16 and connected to the driving rod 17;

[0036] During use, the driving rod 17 is rotated and supported on the mounting base 1 through the support frame 16, and the mounting beam 18 is driven and supported at the same time by setting two groups of driving rods 17. The two groups of mounting beams 18 are synchronously moved in reverse by the opposite directions of the external threads at both ends of the driving rod 17. The multiple groups of blowing needles 19 are installed in coordination through the mounting beam 18 and the working position is easy to adjust. The threaded connection between the driving rod 17 and the mounting beam 18 makes the support have a self-clinching function, thereby improving stability.

[0037] As a preferred embodiment of the above, the power mechanism includes a transmission worm gear 20, a support shaft 21, a transmission worm 22 and a second servo motor 23. The transmission worm gear 20 is coaxially mounted on the drive rod 17, the support shaft 21 is rotatably mounted on the support frame 16, the transmission worm 22 is coaxially mounted on the support shaft 21, the transmission worm 22 is meshed and connected to the transmission worm gear 20, the second servo motor 23 is mounted on the support frame 16, and the output end of the second servo motor 23 is coaxially connected to the support shaft 21;

[0038] During use, the transmission worm 22 is supported on the support frame 16 and coaxially installed on the output end of the second servo motor 23 through the support shaft 21. The support shaft 21 drives the transmission worm 22 to rotate through the second servo motor 23. The transmission worm 22 rotates and is threadedly connected to the transmission worm wheel 20 to provide rotational power to the drive rod 17, thereby increasing the control efficiency of the device.

[0039] As a preferred embodiment of the above embodiment, it further includes support legs 24, multiple groups of support legs 24 are cooperatively mounted on the mounting base 1, and the bottom ends of the support legs 24 are provided with adjustment feet;

[0040] During use, the mounting base 1 is stably supported by the cooperation of multiple sets of supporting legs 24, thereby improving the adaptability of the device to the placement site and increasing the convenience of device adjustment.

[0041] As a preferred embodiment of the above, a damping pad 25 is provided at the connection between the mounting base 1 and the two sets of driven molds 3;

[0042] During use, the sliding friction between the two groups of driven dies 3 and the mounting base 1 is increased by the damping pad 25 .

[0043] As a preferred embodiment of the above, a protection box 26 is further included. The protection box 26 is installed on the mounting base 1. The chain 12 and the two sets of driven sprockets 11 are located in the center of the inner cavity of the protection box 26.

[0044] During use, the chain 12 is engaged with the two sets of driven sprockets 11 and the driving sprocket 10 through the protection box 26 to provide transmission protection, thereby increasing the working stability of the device and improving the working safety of the device.

[0045] First, add the preform mold at one end of the non-blow molding area, then start the first servo motor 9 and the chain 12 is engaged with the driving sprocket 10 and the two sets of driven sprockets 11 respectively to drive the threaded rod 5 to rotate, and then the threaded rod 5 is rotated and threadedly connected with the transmission member 6 to make the driving mold 2 drive the other set of driving molds 2 to move synchronously through the fixed seat 7 and the connecting shaft 8, and then the other set of driving molds 2 and the driven mold 3 cavity cooperate to clamp the preform, and then the other set of driving molds 2 drives the two sets of driven molds 3 to move to the position of the transmission rod 13 After contacting the limit seat 14, the first servo motor 9 provides rotation. At this time, the cavity openings of the two matched driving molds 2 and the driven mold 3 are located on the coaxial line of multiple groups of blowing needles 19. At this time, the second servo motor 23 starts to drive the transmission worm 22 to rotate through the support shaft 21, and then the transmission worm 22 engages with the transmission worm gear 20 to drive the driving rod 17 to rotate. After that, the driving rod 17 and the two groups of mounting beams 18 respectively cooperate to drive the multiple groups of blowing needles 19 to move toward the combined mold cavity of the driving mold 2 and the driven mold 3 and mix into the interior of the preform, and then blow molding can be carried out.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. Plastic container blow molding device, characterized in that, The invention comprises a mounting base (1), a driving mold (2), a driven mold (3), a fixing plate (4), a threaded rod (5), a transmission member (6), a fixing seat (7), a connecting shaft (8) and a driving mechanism. Two groups of driven molds (3) are slidably mounted on the mounting base (1). The two groups of driven molds (3) are symmetrically mounted together. Two groups of fixing seats (7) are symmetrically mounted at both ends of the driving mold (2). The two ends of the connecting shaft (8) are respectively connected to the fixing seats (7) on the two groups of driving molds (2). The two groups of driving molds (2) are respectively located at the two ends of the two groups of driven molds (3). The mold (2) and the driven mold (3) are both provided with a plurality of mold cavities, and the plurality of mold cavities are symmetrically arranged at both ends of the two groups of driving molds (2) and the driven mold (3). The plurality of mold cavities of the driving mold (2) and the driven mold (3) are arranged in a corresponding position. The fixed plate (4) is mounted on the mounting base (1), the two groups of threaded rods (5) are rotatably mounted on the fixed plate (4), the two groups of transmission members (6) are symmetrically mounted on one group of driving molds (2), the threaded rods (5) are connected in a cooperative manner with the threaded holes of the transmission members (6), and the driving mechanism is mounted on the mounting base (1) and connected in a cooperative manner with the two groups of threaded rods (5); The invention also includes a support frame (16), a driving rod (17), a mounting beam (18), a blow needle (19) and a power mechanism, wherein the support frames (16) at both ends are symmetrically mounted on the two ends of the driven mold (3), the two ends of the driving rod (17) are respectively provided with external threads, the external threads at both ends of the driving rod (17) are screwed in opposite directions, the driving rod (17) is rotatably mounted on the support frame (16), the two ends of the driving rod (17) are respectively threaded with two groups of mounting beams (18), and a plurality of groups of blow needles (19) are mounted on the mounting beams (18), the number of the blow needles (19) is the same as the number of the mold cavities of the driving mold (2) and the driven mold (3) and corresponds one to one, and the power mechanism is mounted on the support frame (16) and connected to the driving rod (17); The power mechanism comprises a transmission worm wheel (20), a support shaft (21), a transmission worm (22) and a second servo motor (23), wherein the transmission worm wheel (20) is coaxially mounted on a driving rod (17), the support shaft (21) is rotatably mounted on a support frame (16), the transmission worm (22) is coaxially mounted on the support shaft (21), the transmission worm (22) is meshed and connected to the transmission worm wheel (20), the second servo motor (23) is mounted on the support frame (16), and the output end of the second servo motor (23) is coaxially matched with the support shaft (21).

2. The plastic container blow molding device according to claim 1, characterized in that: The driving mechanism comprises a first servo motor (9), a driving sprocket (10), a driven sprocket (11) and a chain (12); the first servo motor (9) is mounted on a mounting base (1); the driving sprocket (10) is coaxially mounted on an output end of the first servo motor (9); the driven sprocket (11) is coaxially mounted on a threaded rod (5); and the chain (12) is respectively meshed and connected with two groups of driven sprockets (11) and the driving sprocket (10).

3. The plastic container blow molding device according to claim 1, characterized in that: The invention also includes a transmission rod (13) and a limiting seat (14), wherein two groups of the transmission rods (13) are symmetrically installed at the two ends of the two groups of driven dies (3), and two groups of limiting seats (14) are respectively installed at the two ends of the driven dies (3), and the two groups of limiting seats (14) located on the same side of the driven dies (3) are symmetrically installed, and the transmission rods (13) are cooperatively connected with the limiting seats (14).

4. The plastic container blow molding device according to claim 1, characterized in that: It also includes positioning sleeves (15), two groups of positioning sleeves (15) are symmetrically installed at the two ends of the two groups of driven molds (3), and the connecting shaft (8) is slidably connected to the shaft holes of the positioning sleeves (15).

5. The plastic container blow molding device according to claim 1, characterized in that: It also includes support legs (24), and multiple groups of the support legs (24) are cooperatively mounted on the mounting base (1), and the bottom ends of the support legs (24) are provided with adjustment feet.

6. The plastic container blow molding device according to claim 1, characterized in that: The device also includes a damping pad (25) provided at the connection between the mounting base (1) and the two sets of driven dies (3).

7. The plastic container blow molding device according to claim 2, characterized in that: It also includes a protection box (26), which is installed on the installation base (1), and the chain (12) and two sets of driven sprockets (11) are located in the center of the inner cavity of the protection box (26).

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