TWI529053B - Blow molding device for a rotary bottle blowing machine - Google Patents

Description

Blow molding device for rotary blow molding machine

The present invention provides a blow molding apparatus for a rotary blow molding machine which is related to a blow molding apparatus.

The apparatus for performing blow molding in the blow molding process is a blow molding machine, as shown in Figs. 1 and 2, which is a blow molding apparatus disclosed in U.S. Patent No. 8,100,688, which is mainly a blow molding apparatus 10 A drive shaft 12 is pivotally disposed on a fixed support base 11, and a fixed die 13 is further fixed on the support base 11, and a movable die 14 pivotable relative to the fixed die 13 is fixed. The bottom side of the die 13 is further provided with a cam groove 131. At the same time, the drive shaft 12 is coupled to the movable die 14 through a first link set 15 perpendicular to the drive shaft 12, and transmits a direction different from the drive shaft 12. The second link set 16 is coupled to a bottom mold 17, and the bottom mold 17 is further coupled to a cam 171. The cam 171 of the bottom mold 17 is movably received in the cam groove 131; thereby, the drive shaft 12 rotates. The movable mold 14 is pivoted relative to the fixed mold 13 and the bottom mold 17 is driven by the first link set 15 and the second link set 16 to make the bottom mold 17 follow the cam 171 along the cam. The groove 131 is raised and lowered to complete the simultaneous movement of the left and right opening and closing molds and the bottom mold lifting and lowering; Blow molding apparatus 10 through the main drive shaft 12 to rotate with two different direction of the extension linkage 15 and 16 produce driving the movable mold opening mold, a bottom mold driving operation of the lift, the vertical drive shaft 12 The two sets of connecting rod sets 15, 16 will become the weakness of the overall structure, and both ends of the two connecting rod sets 15, 16 are connected to the driving shaft 12, the movable mold 14 and the bottom mold 17 in a pivotable manner. Each pivot point is critical to the smoothness, accuracy and efficiency of the overall movement. The structural accuracy and quality requirements of the overall device are high and difficult to control accurately. Therefore, it is difficult to assemble, the device cost is high, and the accuracy is difficult to control. In addition, as shown in FIGS. 3 and 4, the US Patent Publication No. US20120177771A1, "Blow Molding Apparatus", is mainly provided with a fixed mold 22 fixedly disposed on a fixed platform 21 side. The other side is provided with a column 211 and a bottom mold 23, and the platform 21 is further provided with a first rotating shaft 24 and a second rotating shaft 25. The first rotating shaft 24 is coupled to a movable mold 26 through a first connecting block 241. The outer surface of the movable mold 26 has a vertical angle resisting recess 261, and the first connecting block 241 is further coupled to the second fixed shaft 25 through a connecting rod 27 perpendicular to the extending direction of each of the rotating shafts 24, 25. Two connecting blocks 251, and the connecting rod 27 Both ends are coupled in a pivotal manner, and the second rotating shaft 25 is further connected with a pair of resisting blocks 252 which should be shaped to resist the concave portion 261; thereby, the movable mold 26 and the fixed mold 22 are to be opened and closed. When the bottom mold 23 is moved up and down, it is necessary to drive the bottom mold 23 to be lifted and lowered by a lifting drive source that drives the bottom mold 23 to move up and down, and the driving source that drives the rotation of the first rotating shaft 24 to drive the first rotating shaft 24 to rotate, and the overall structure is The first rotating shaft 24 is rotated to drive the first connecting block 241 and the movable mold 26 to pivot and generate the opening and closing action, and is coupled to the first connecting block 241. The connecting rod 27 also acts to drive the second connecting block 251 to move, and the second connecting block 251 drives the second rotating shaft 25 and the resisting block 252 thereon to generate a pivoting action, when the movable mold 26 generates a clamping motion. The resisting block 252 is also actuated at the same time and is mortgaged in the resisting recess 261 of the movable mold 26 when the mold clamping operation is completed. The resisting block 26 is stably resisted by the resisting block 252 to withstand blowing. The tension applied to the movable mold during the film process ensures the processing precision and the yield; however, the "blow molding apparatus" of the US Pat. No. US20120177771A1 has two sets of driving sources which are required to have a lifting and opening and closing mold in addition to the overall complicated structure. In addition to the high cost, the overall structure must have a connecting rod 27 perpendicular to the extending direction of each of the rotating shafts 24, 25 in addition to the respective rotating shafts 24, 25 to drive the resisting block 252, which is different from the respective rotating shafts 24, 25. The connecting rod 27 of the direction is arranged as a weak point of the overall structure, and the connecting ends of the connecting rod 27 are pivotally connected. The structural precision and quality requirements of the overall device are the same as those of the prior art, and it is difficult to accurately control, and the assembly difficulty is difficult. The high cost of the device, the high cost of the device, and the difficulty in controlling the lack of improvement; further, as shown in Figures 5 and 6, the German Patent No. DE 10 2008 045 569 A1 "Blow Molding Apparatus", the blow molding apparatus 30 is mainly through a The driving source 31 drives a control member 32 to rotate. The control member 32 has a first cam portion 321 and a second cam portion 322, and the control member 32 is further connected through a connecting rod 33. The engaging member 34 has a first roller member 341 and a second roller member 342 that abut against the outer periphery of the first cam portion 321 and the second cam portion 322. The other side of the opening and closing driving member 34 pivots the first driving rod 343 and the second driving rod 344, and the first driving rod 343 and the second driving rod 344 are respectively coupled to a forming die 35, 36; Thereby, the driving source 31 drives the control member 32 to rotate. When the control member 32 rotates, the first cam portion 321 and the second cam portion 322 rotate synchronously, and the first roller member 341 and the second portion are rotated. The position of the roller member 342 against the first cam portion 321 and the second cam portion 322 is changed correspondingly, and the configuration of the first cam portion 321 and the second cam portion 322 is transmitted to drive the opening and closing of the driving member 34. The position of the first driving rod 343 and the second driving rod 344 can be changed simultaneously while the opening and closing driving member 34 is displaced, thereby driving the first driving rod 343 and the second driving rod 344. The forming dies 35, 36 generate an opening and closing action; It can be seen that although the patent "Blow Molding Equipment" of German Patent No. DE102008045569A1 can achieve the purpose of driving the opening and closing mold, it is still unable to drive the bottom mold to lift and complete the mold clamping action on the same mechanism, and there is still room for improvement. In addition, the control member of the blow molding apparatus 30 must be driven to rotate relative to the first driving rod 343 and the second driving rod 344 in addition to being driven by the opening and closing driving member. When the action is completed, the action of the opening and closing of the driving member to drive the opening and closing mode is indirect driving, and the non-direct driving mode will result in the reduction of the overall operational efficiency and the difficulty of the operation precision control; It can be seen that each blow molding equipment still has the disadvantage that the operation precision is difficult to control, the structure is complicated, or the operation efficiency is low. In view of this, the inventors have devoted themselves to research and further conceived, and after many trials and developments, finally invented a rotary type. Blow molding machine for blow molding machines.

The invention provides a blow molding device for a rotary blow molding machine, the main purpose of which is to improve the lack of operation precision, complicated structure or low operational efficiency of the conventional blow molding device.

To achieve the foregoing objective, the present invention provides a blow molding apparatus for a rotary blow molding machine, comprising: a support platform having a through hole; and a coaxial drive device disposed adjacent to the support platform, the coaxial drive device including a first along A first control unit and a second control unit are fixedly disposed on the drive shaft extending in the direction, the first control unit has a first control unit, and the second control unit has a second control unit, the first control unit a cam groove extending in a first direction, and the second control The part is at least one guiding groove of the two lifting sections, and the lifting section is symmetrically disposed and has an angle with the first direction; a fixed die is fixedly and non-rotatably disposed on the supporting platform; and a movable die is coupled to the movable body The mold shaft is rotatably disposed on the support platform, and the movable mold shaft is pivoted by the first control portion to drive the movable mold to open and close with respect to the fixed mold; and a bottom mold is opposite to the first direction The through hole is mechanically coupled to the support platform, and the bottom mold is driven by the second control unit to move up and down in the first direction.

For the same purpose as described above, the present invention further provides a blow molding device for a rotary blow molding machine, comprising: a support platform having a through hole; and a coaxial drive device disposed adjacent to the support platform, the coaxial drive device including an edge a first control unit and a second control unit are fixedly disposed on the drive shaft extending in the first direction, the first control unit has a first control unit, and the second control unit has a second control unit. a control portion is a cam groove extending in a depth in a first direction, and the second control portion is a guide groove including at least two lifting sections, and the lifting section is symmetrically disposed and has an angle with the first direction; The movable mold is coupled to a movable mold shaft and rotatably disposed on the support platform. The movable mold shaft is pivoted by the first control portion to drive the movable mold relative to the movable mold. The fixed mold is opened and closed; and a bottom mold is mechanically coupled to the branch in a first direction with respect to the through hole Supporting the platform, and the bottom mold is driven by the second control portion to rise and fall in the first direction, the bottom mold includes a portion coupled to a cover portion, the seat portion defines a gas flow passage, and the first end of the gas flow passage is a first The port is open to the side of the seat, and a second port at the other end is adjacent to the cover, and the first port opened to the seat is for inputting high pressure gas.

The invention only needs to drive the rotation of the coaxial driving device, and the first control unit and the second control unit on the coaxial driving device can simultaneously drive the movable mold to open and close the mold through the rotating action, and simultaneously drive the bottom mold to lift and lower, the overall structure It is simple, and the stable combination of components can improve the stability of operation and improve the operation efficiency.

"Knowledge Technology"

10‧‧‧Blow molding equipment

11‧‧‧ Support

12‧‧‧Drive shaft

13‧‧‧Fixed mode

131‧‧‧ cam slot

14‧‧‧ movable mold

15‧‧‧First Link Set

16‧‧‧Second linkage

17‧‧‧Bottom mode

171‧‧‧ cam

20‧‧‧Blow molding equipment

21‧‧‧ platform

211‧‧‧ column

22‧‧‧Fixed mode

23‧‧‧Bottom mode

24‧‧‧First shaft

241‧‧‧First link block

25‧‧‧second shaft

251‧‧‧Second link

252‧‧‧Resistance block

26‧‧‧ movable mold

261‧‧‧Resist the recess

27‧‧‧ Connecting rod

30‧‧‧Blow molding equipment

31‧‧‧ Driving source

32‧‧‧Controls

321‧‧‧First Cam Department

322‧‧‧Second cam department

33‧‧‧ Connecting rod

34‧‧‧Opening and driving parts

341‧‧‧First roll

342‧‧‧Second roller

343‧‧‧First moving rod

344‧‧‧Second rod

35‧‧‧ Forming die

36‧‧‧ Forming die

"this invention"

40‧‧‧Support platform

41‧‧‧through hole

42‧‧‧Fixed extension block

421‧‧‧ Guides

50‧‧‧ coaxial drive

51‧‧‧Drive shaft

52‧‧‧First Control Unit

521‧‧‧First Control Department

53‧‧‧Second Control Unit

531‧‧‧Second Control Department

532‧‧‧First Maintenance Section

533‧‧‧second maintenance section

534‧‧‧lifting section

54‧‧‧ third control unit

541‧‧ Third Control Department

60‧‧‧Fixed mode

70‧‧‧ movable mold

71‧‧‧ movable mold shaft

72‧‧‧ first joint block

73‧‧‧ movable mold drive

74‧‧‧Molded parts

741‧‧‧Stop the hook

742‧‧‧With the bevel

80‧‧‧Bottom mode

81‧‧‧With guides

82‧‧‧Bottom mold drive

83‧‧‧

831‧‧‧ gas flow channel

832‧‧‧ first port

833‧‧‧second port

84‧‧‧ 盖部

85‧‧‧Airtight gasket

90‧‧‧Clamping unit

91‧‧‧Clamping shaft

92‧‧‧Lock module

921‧‧‧active hook

922‧‧‧Guiding bevel

93‧‧‧ third binding block

94‧‧‧Lock module driver

D1‧‧‧ first direction

H1‧‧‧ first height

H2‧‧‧second height

Fig. 1 is a view showing a state of opening of a first conventional blow molding apparatus.

Fig. 2 is a view showing a mold clamping state of the first conventional blow molding apparatus.

Fig. 3 is a view showing the state of the opening of the second conventional blow molding apparatus.

Fig. 4 is a view showing a state of clamping of a second conventional blow molding apparatus.

Fig. 5 is a view showing a state of opening of a third conventional blow molding apparatus.

Fig. 6 is a view showing a clamping state of a third conventional blow molding apparatus.

Fig. 7 is a perspective view showing the mold opening state of the blow molding device of the rotary blow molding machine of the present invention.

Fig. 8 is a plan view showing the mold opening state of the blow molding device of the rotary blow molding machine of the present invention.

Fig. 9 is a plan view showing the mold clamping state of the blow molding device of the rotary blow molding machine of the present invention.

Fig. 10 is a plan view showing the mold opening state of the blow molding device of the rotary blow molding machine of the present invention.

Fig. 11 is a plan view showing the mold clamping state of the blow molding device of the rotary blow molding machine of the present invention.

Fig. 12 is a perspective view showing the mold clamping state of the blow molding device of the rotary blow molding machine of the present invention.

Figure 13 is a partial cross-sectional view showing a blow molding apparatus of a rotary blow molding machine of the present invention.

In order to enable the review committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following [detailed description of the drawings] as follows: The blow molding device of the rotary blow molding machine of the present invention The preferred embodiment, as shown in FIGS. 7-13, includes a support platform 40 having a through hole 41, and a fixed extension block 42 is formed on one side of the support platform 40. The guiding member 421 of the first direction D1 is a sliding rail; a coaxial driving device 50 is disposed adjacent to the supporting platform 40, and the coaxial driving device 50 includes a first extending direction D1. A first control unit 52, a second control unit 53, and a third control unit 54 are fixedly disposed on the drive shaft 51, and the drive shaft 51 and the first control unit 52, the second control unit 53 and the The third control unit 54 rotates around the first direction D1, and the first control unit 52 has a first control unit 521, and the second control unit 53 has a second control unit 531. The third control unit 54 has a third control The first control unit 521 and the third control unit 541 are located at different heights of the first direction D1, and the second control unit 531 is located between the first control unit 521 and the third control unit 541. The first control unit 52, the second control unit 53, and the third control unit 54 of the embodiment are all cylindrical structures, and the diameter of the first control unit 52 is larger than the diameter of the third control unit 54, and the first Diameter of three control unit 54 The first control unit 521 and the third control unit 541 are respectively cam grooves extending in the first direction D1, and the second control unit 531 is The first maintaining section 532, the second maintaining section 533 and the second lifting section 534 are included, the first maintaining section 532 is parallel to the second maintaining section 533, and the lifting section 534 is respectively connected to the second maintaining section Between the two ends 532, 533, the first maintaining segment 532 extends in a first height H1 in the first direction D1, and the second maintaining segment 533 extends in a second height H2 in the first direction D1. A height H1 and the second height H2 are located at different heights in the first direction D1, and the lifting section 534 is symmetrically disposed and has an inclined angle with the first direction D1; a fixed mold 60 is fixed. Rotatingly disposed on the support platform 40; a movable mold 70 coupled to a movable mold shaft 71 and rotatably disposed on the support platform 40, the movable mold shaft 71 is rotatably disposed through the support platform 40 at one end and Combining the side of the movable mold 70, the other end runs through the branch The platform 40 is coupled to a first binding block 72, and the first bonding block 72 is coupled to a movable mold driving member 73. The movable mold driving member 73 is received in the first control unit 52 of the coaxial driving device 50. The control unit 521 is controlled by the first control unit 521, so that the movable mold shaft 71 can be pivoted by the first control unit 52, and the movable mold 70 can be driven to open and close with respect to the fixed mold 60, and The movable mold driving member 73 and the movable mold rotating shaft 71 respectively extend along the first direction D1; and the other side of the movable mold 70 is provided with a clamping mold fitting 74, and the clamping mold fitting 74 has a stopping hook portion 741. The locking hook 741 has a matching inclined surface 742; a bottom mold 80 is slidably sleeved on the guiding member 421 by a matching guiding member 81. The engaging guiding member 81 of the embodiment a slider, whereby the support platform 40 is mechanically coupled to the through hole 41 along the first direction D1, and the bottom of the bottom mold 80 is provided with a bottom. a mold driving member 82, the bottom mold driving member 82 extending into the second control portion 531 of the second control unit 53 of the coaxial driving device 50 is controlled by the second control unit 53; and the bottom mold 80 includes a portion 83 In conjunction with a cover portion 84, the seat portion 83 defines a gas flow passage 831. A first port 832 at one end of the gas flow passage 831 is open to the side of the seat portion 83, and a second port 833 at the other end is adjacent to the cover portion. a portion 84, and a hermetic gasket 85 is further disposed between the seat portion 83 and the cover portion 84, the first port 832 opened to the seat portion 83 is configured to input high-pressure gas; and a clamping unit 90 includes a lock The mold shaft 91 and a lock module 92 are pivotally inserted through the fixed mold 60 and coupled with the lock module 92, and the other end is coupled with a third joint block 93. The lock module driver 94 is received in the third control unit 541 of the third control unit 54 of the coaxial drive unit 50 and controlled by the third control unit 541. The lock module driver 94 and The lock mold shafts 91 all extend along the first direction D1, and the lock module 92 has an active hook portion 92. 1. The active hook portion 921 has a guiding slope 922.

The above is the structural configuration and features of the blow molding device of the rotary blow molding machine of the present invention, and in operation, as long as the driving shaft 51 of the coaxial driving device 50 is driven to rotate with a driving source, the driving shaft 51 is synchronously driven. The first control unit 52, the second control unit 53, and the third control unit 54 rotate, and when the first control unit 52, the second control unit 53, and the third control unit 54 rotate, the first control The unit 52, the second control unit 53 and the first control unit 521, the second control unit 531 and the third control unit 541 on the third control unit 54 change the position angle to drive the movable mold 70 respectively. The bottom mold 80 and the lock module 92 are actuated; and the first control unit 521, the second control unit 531, and the third control unit 541 are operated by the first control unit 521 and the second The control unit 531 and the movable mold driving member 73, the bottom mold driving member 82 and the lock module driving member 94 in the third control portion 541 can follow the first control The position of the portion 521, the second control portion 531, and the third control portion 541 is changed to change the position; and when the movable mold member 73 changes position, the movable mold 70 can be changed by the first coupling block 72 at the same time. Position, and can be changed to the mold opening state of the seventh, eighth, and tenth views, or the mold clamping state as shown in the figures 9, 11, and 12; and when the bottom mold driving member 82 changes position, the position can be directly driven. The bottom mold 80 generates a height lifting operation in the first direction D1, and when the movable mold 70 is in the mold opening state, the bottom mold 80 is lowered to a lower position in the first direction D1, and the movable mold is combined In the modal state, the bottom mold 80 is raised to a higher position in the first direction D1; and when the lock module driving member 94 changes position, the lock module 92 can be driven to change position through the third joint block 93, and When the movable mold 70 is in the mold opening state, the lock module 92 is disengaged from the mold clamping fitting 74 on the movable mold 70. When the movable mold 70 is in the mold clamping state, the lock module 92 is displaced close to the mold clamping. The mating member 74 passes through the mating ramp 7 when the mating ramp 742 is engaged with the guiding ramp 922 42 and the guiding of the guiding slope 922, finally, the active hook portion 921 of the locking module 92 is hooked on the stopping hook portion 741 of the clamping mold fitting 74, and the movable mold 70 is clamped with the fixed mold 60 and formed. locking.

It can be seen from the above that the first control unit 521, the second control unit 531 and the third control unit 541 of the coaxial drive device 50 can simultaneously drive the coaxial drive unit 50 only when the single drive source is used to drive the coaxial drive unit 50 to rotate. The movable mold 70 is opened and closed, the bottom mold 80 is lifted and the lock module 92 is locked or loosened, and the opening and closing mold and the mold clamping operation can be simultaneously and quickly achieved after one driving force input, and the overall structure is simplified. The energy source for the structure and the driving can be reduced, and the driving source for driving the coaxial driving device 50 in this embodiment is a servo motor; in addition, the first control unit 521, the second control unit 531, and the first The manner in which the three control units 541 drive the movable mold driving member 73, the bottom mold driving member 82 and the locking module driving member 94 is directly determined by the groove structure of different strikes or shapes, and the driving action is refined. The accuracy is high and very certain, and the direct driving method can improve the efficiency of the driving action; at the same time, the bonding state of each component in the invention is a stable bonding state, except that the structural strength is higher and the service life is longer. The stability and certainty of the operation are also improved, and at the same time, the operational stability and efficiency of the rear-end opening and closing mold can be ensured.

In addition, since the present invention is mainly applied to a blow molding process of blow molding, when the blow molding is performed after the mold clamping, the movable mold 70, the fixed mold 60, and the bottom mold 80 must each undergo internal blow expansion. Stress, and the mold clamping unit 90 of the present invention can stably lock the movable mold 70 and the fixed mold 60, and the bottom mold 80 can enter the bottom of the bottom mold 80 through the high pressure air input from the first port 832. The high-pressure air presses the lid portion 84 of the bottom mold 80, whereby the bottom mold 80 can exert a force against the application of the bottom mold 80 at the time of blow molding, thereby ensuring stability and processing accuracy in the forming process.

40‧‧‧Support platform

41‧‧‧through hole

42‧‧‧Fixed extension block

421‧‧‧ Guides

50‧‧‧ coaxial drive

51‧‧‧Drive shaft

52‧‧‧First Control Unit

521‧‧‧First Control Department

53‧‧‧Second Control Unit

531‧‧‧Second Control Department

532‧‧‧First Maintenance Section

533‧‧‧second maintenance section

534‧‧‧lifting section

54‧‧‧ third control unit

541‧‧ Third Control Department

60‧‧‧Fixed mode

70‧‧‧ movable mold

71‧‧‧ movable mold shaft

72‧‧‧ first joint block

73‧‧‧ movable mold drive

74‧‧‧Molded parts

741‧‧‧Stop the hook

742‧‧‧With the bevel

80‧‧‧Bottom mode

81‧‧‧With guides

82‧‧‧Bottom mold drive

83‧‧‧

832‧‧‧ first port

84‧‧‧ 盖部

90‧‧‧Clamping unit

91‧‧‧Clamping shaft

92‧‧‧Lock module

921‧‧‧active hook

922‧‧‧Guiding bevel

93‧‧‧ third binding block

94‧‧‧Lock module driver

D1‧‧‧ first direction

Claims (10)

A blow molding device for a rotary blow molding machine, comprising: a support platform having a through hole; a coaxial drive device disposed adjacent to the support platform, the coaxial drive device comprising a fixed arrangement on a drive shaft extending in a first direction a first control unit and a second control unit, the first control unit has a first control unit, and the second control unit has a second control unit, the first control unit has a depth extending in the first direction a cam slot, wherein the second control portion is at least one of the two lifting sections, the lifting section is symmetrically disposed and has an angle with the first direction; a fixed die is fixedly and non-rotatably disposed on the supporting platform; a movable mold coupled to a movable mold shaft and rotatably disposed on the support platform, the movable mold shaft is pivoted by the first control portion to drive the movable mold to open and close with respect to the fixed mold; and a bottom mold And slidingly mechanically coupled to the support platform in a first direction relative to the through hole, and the bottom mold is driven by the second control portion to move up and down in the first direction. The blow molding device of the rotary blow molding machine according to claim 1, wherein one end of the movable mold shaft is rotatably disposed through the support platform and coupled to one side of the movable mold, and the other end is Through the support platform. The blow molding device of the rotary blow molding machine according to claim 1, wherein one end of the movable mold shaft is rotatably disposed through the support platform and coupled to one side of the movable mold, and the other end is The first end of the movable mold shaft is coupled to a first joint block, and the first joint block is coupled with a movable mold carrier, and the movable mold carrier is received in the first control portion. The control unit controls the driving, and the movable mold driving member and the movable mold The rotating shafts respectively extend in the first direction. The blow molding device of the rotary blow molding machine according to claim 1, wherein one side of the support platform is formed with a fixed extension block, and the fixed extension block is provided with a guide extending along the first direction. a guiding member, wherein one side of the bottom mold is slidably sleeved on the guiding member by a mating guiding member, and is displaceable in a first direction, the guiding member is a sliding rail, and the fitting guiding member is Slider. The blow molding device of the rotary blow molding machine according to claim 1, wherein one side of the support platform is formed with a fixed extension block, and the fixed extension block is provided with a guide extending along the first direction. a guiding member, wherein one side of the bottom mold is slidably sleeved on the guiding member with a mating guiding member, and is displaceable in a first direction, and a bottom mold driving member is disposed on the other side of the bottom mold. The bottom mold driving member extends into the second control portion and is controlled by the second control unit. The blow molding device of the rotary blow molding machine according to the first aspect of the invention, wherein the second control unit comprises a first maintaining section, a second maintaining section and a second lifting section, the first maintaining section Parallel to the second maintaining section, the two lifting sections are respectively connected between two ends of the maintaining section, and the first maintaining section and the second maintaining section are located at different height positions in the first direction. The blow molding device of the rotary blow molding machine according to claim 1, wherein a third control unit is further fixed on the drive shaft of the coaxial drive device, and the third control unit has a third a control portion, the third control portion is a cam groove extending in a depth in a first direction, and the fixed mold is pivotally coupled to a lock module by a mold clamping shaft, and the other end of the lock mold shaft coupled with the lock module In combination with a third binding block, the third binding block is combined with a locking module driving member, and the locking module driving member is received in the third control portion and controlled by the third control portion, the locking module driving member and the locking device The mold shafts all extend in the first direction, and the lock module has an active hook portion, and one side of the movable mold is provided with a mold clamping fitting, the mold clamping mating member has a stop a hook portion, the third control portion drives the lock module to pivot or loose relative to the mold clamping fitting. The blow molding device of the rotary blow molding machine according to claim 7, wherein the restraining hook portion of the mold clamping fitting has a matching inclined surface, and the active hook portion of the locking module has a guiding The inclined surface can assist the hook positioning by guiding the matching inclined surface and the guiding inclined surface when the stopping hook portion is in contact with the active hook portion. The blow molding device of the rotary blow molding machine according to the first aspect of the invention, wherein the bottom mold comprises a portion coupled to a cover portion, the seat portion defines a gas flow passage, and one end of the gas flow passage The first port is open to the side of the seat, and the second port of the other end is adjacent to the cover. An airtight gasket is further disposed between the seat and the cover, and the first port is open to the seat. Enter high pressure gas. A blow molding device for a rotary blow molding machine, comprising: a support platform having a through hole; a coaxial drive device disposed adjacent to the support platform, the coaxial drive device comprising a fixed arrangement on a drive shaft extending in a first direction a first control unit and a second control unit, the first control unit has a first control unit, and the second control unit has a second control unit, the first control unit has a depth extending in the first direction a cam slot, wherein the second control portion is at least one of the two lifting sections, the lifting section is symmetrically disposed and has an angle with the first direction; a fixed die is fixedly and non-rotatably disposed on the supporting platform; a movable mold coupled to a movable mold shaft and rotatably disposed on the support platform, the movable mold shaft is pivoted by the first control portion to drive the movable mold to open and close with respect to the fixed mold; and a bottom mold And being mechanically coupled to the support platform in a first direction relative to the through hole, And the bottom mold is driven by the second control unit to rise and fall in a first direction, the bottom mold includes a portion coupled to a cover portion, the seat portion defines a gas flow passage, and a first port at one end of the gas flow passage is open to A side of the seat, a second port at the other end is adjacent to the cover, and a first port open to the seat is available for inputting high pressure gas.