Mold opening and closing device of bottle blowing machine

Abstract

The utility model discloses a mould opening and closing device of a bottle blowing machine, which comprises a mould opening and closing mould frame and a bottom mould assembly, the mould opening and closing mould frame comprises a first mould frame and a second mould frame, a first half mould and a second half mould are respectively fixed on the first mould frame and the second mould frame, and the bottom mould assembly is arranged on a base in a lifting way. The first mold frame and the second mold frame are driven by a first driving device and a second driving device respectively, the bottom mold assembly comprises a bottom mold mounting plate, a bottom mold is mounted above the bottom mold mounting plate, the bottom mold mounting plate is mounted on a base, an active driving plate is mounted on the base, a driving groove is formed in the active driving plate, a driving pin shaft is arranged on a bottom mold lifting frame, and the driving pin shaft is connected with the driving pin shaft. A rack is fixed to the active driving plate, the first driving device comprises a first driving motor, the first driving motor drives the first mold frame to move horizontally, a driving gear is further fixed to a driving shaft of the first driving motor, and the mold opening and closing device is simple in structure and achieves mold opening and closing driving of the first half mold, the second half mold and the bottom mold.

Description

Technical Field

[0001] This utility model relates to the field of blow molding machine technology, and in particular to a blow molding machine mold opening and closing device. Background Technology

[0002] Blow molding machines require molds for bottle blowing, which typically include a left mold, a right mold, and a bottom mold. These molds are fixed to the left mold frame, right mold frame, and bottom mold plate, respectively, and are driven by corresponding drive devices to achieve mold closing and opening. When the mold is closed, the bottle is blown; when the mold is open, the bottle is removed and the preform is placed in place. When the mold opens, the bottom mold needs to descend to facilitate bottle removal; when the mold closes, the bottom mold needs to rise to the closed position.

[0003] The invention application document with publication number CN118849390A discloses an opening and closing mold linkage device for a blow molding machine and a blow molding machine. The opening and closing mold linkage device uses a linkage mechanism such as a cam, a first transmission shaft, a second transmission shaft, a second connecting rod, and a seventh connecting rod to realize the opening and closing actions of the left mold, the right mold, and the bottom mold. However, the overall structure of this device is very complex, with many connecting rods and cranks. It is difficult to ensure accurate power transmission and timing. The installation angle and structure of the connecting rods and cranks need to be adjusted to ensure that the bottom mold rises into place just when the mold is closed. The overall structure is complex and the debugging time is long. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a mold opening and closing device for a blow molding machine. The mold opening and closing device has a simple structure, short debugging time, and can realize the opening and closing of the first half mold, the second half mold and the bottom mold.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: an opening and closing mold device for a blow molding machine, used for linkage opening and closing of an opening and closing mold frame and a bottom mold assembly. The opening and closing mold frame includes a first mold frame and a second mold frame slidably disposed on a base. The bottom mold is vertically and flexibly disposed on the base. A first half mold and a second half mold that cooperate with each other are respectively fixed on the first mold frame and the second mold frame. A bottom mold assembly is vertically and flexibly installed on the base between the first half mold and the second half mold. The first mold frame and the second mold frame are driven to move closer to each other or separate by a first driving device and a second driving device, respectively. The bottom mold assembly includes a bottom mold mounting plate. A plurality of bottom molds are fixedly installed on the top of the bottom mold mounting plate. The bottom mold mounting plate is vertically and flexibly installed on the base via a bottom mold lifting frame. A bottom mold is horizontally and slidably mounted on the base. An active drive plate is provided with a drive groove, which includes a horizontal groove section and an inclined groove section with a vertical drop. A drive pin shaft located in the drive groove is provided on the bottom mold lifting frame. A rack is fixed on the active drive plate. The first drive device includes a first drive motor, which drives the first mold frame to move horizontally through a first crank-connecting rod mechanism. The drive shaft of the first drive motor is connected to the crank of the first crank-connecting rod mechanism. A drive gear that is connected to the rack is also fixed on the drive shaft of the first drive motor. The second drive device includes a second drive motor, which drives the second mold frame to move horizontally through a second crank-connecting rod mechanism. The drive shaft of the second drive motor is connected to the crank of the second crank-connecting rod mechanism.

[0006] As a preferred embodiment, the bottom mold lifting frame includes a lifting base plate, which is fixedly connected to the bottom mold mounting plate via several vertical guide rods. A driven plate is fixedly installed on the lifting base plate, and the drive pin is installed on the driven plate.

[0007] As a preferred embodiment, there are two active drive plates arranged in parallel and mirror image. The rack is fixed on one of the active drive plates. The active drive plates are connected by an intermediate connecting shaft. The driven plate is located between the two active drive plates. There are two drive pins, which are fixed on both sides of the driven plate respectively. The drive pins extend into the drive grooves of the corresponding active drive plates.

[0008] As a preferred embodiment, the lifting base plate is provided with a vertically arranged mounting shaft, the driven plate is fixed on the mounting shaft, and an auxiliary guide mechanism is also provided between the driven plate and the base.

[0009] As a preferred embodiment, the auxiliary guiding mechanism includes a vertical auxiliary guide rod fixed on the base, and the driven plate is provided with an auxiliary guide sleeve that cooperates with the auxiliary guide rod.

[0010] As a preferred embodiment, the first crank-connecting rod mechanism includes a first crank, a first drive connecting rod, several first left-opening and closing connecting rods and a first right-opening and closing connecting rod, and multiple first intermediate connecting rods. The first crank is fixed to the drive shaft of the first drive motor. The lower end of the first drive connecting rod is hinged to the first crank. The base is provided with a first strip-shaped hole that facilitates the upward extension and penetration of the first drive connecting rod. The base is provided with a first fixed seat located outside the first mold frame. One end of the first left-opening and closing connecting rod is hinged to the first fixed seat; the other end of the first left-opening and closing connecting rod is hinged to the first intermediate connecting rod. One end of the first right-opening and closing connecting rod is hinged to the first mold frame, and the other end of the first right-opening and closing connecting rod is also hinged to the first intermediate connecting rod. The first left-opening and closing connecting rods are arranged in parallel, and the first right-opening and closing connecting rods are arranged in parallel. The upper end of the first drive connecting rod is hinged to the middle of the lowermost first intermediate connecting rod.

[0011] As a preferred embodiment, the first drive motor is fixed to the base via a first motor mount, the first motor mount being provided with a guide block, and the guide block being provided with a guide groove that engages with the rack.

[0012] After adopting the above technical solution, the effect of this utility model is that: since the first mold frame and the second mold frame are driven to move closer to each other or separate by the first driving device and the second driving device respectively, and the first mold frame and the second mold frame are driven by independent first driving devices and second driving devices respectively, many linkage mechanisms are eliminated, the structure is simplified, and the debugging time can also be simplified. The other bottom mold assembly includes a bottom mold mounting plate, on which several bottom molds are fixedly mounted. The bottom mold mounting plate is mounted on the base via a bottom mold lifting frame. An active drive plate is horizontally slidably mounted on the base. The active drive plate is provided with a drive groove, which includes a horizontal groove section and an inclined groove section with a vertical drop. A drive pin shaft located in the drive groove is provided on the bottom mold lifting frame. A rack is fixed on the active drive plate. The first drive device includes a first drive motor, which drives the first mold frame to move horizontally via a first crank-connecting rod mechanism. The drive shaft of the first drive motor is connected to the first crank of the first crank-connecting rod mechanism. A drive gear connected to the rack is also fixed on the drive shaft of the first drive motor. The second drive device includes a second drive motor, which drives the second mold frame to move horizontally via a second crank-connecting rod mechanism. The drive shaft of the second drive motor is connected to the crank of the second crank-connecting rod mechanism. The rotation of the output shaft of the first drive motor drives the first mold frame to move horizontally via the first crank-connecting rod mechanism. Simultaneously, the rotation of the output shaft also drives the drive gear to rotate, which in turn drives the rack to move. The movement of the rack drives the active drive plate to move horizontally, which in turn drives the inclined section of the drive slot to move the drive pin shaft, ultimately causing the bottom mold mounting plate to rise and fall vertically, thus realizing the lifting and lowering of the bottom mold assembly. The first drive device can drive the first mold frame to move horizontally while also driving the bottom mold to rise and fall. At the same time, the second drive device drives the second mold frame to move horizontally, thereby realizing the mutual approach and separation of the first half mold and the second half mold, thus completing the mold closing and opening actions. This mold opening and closing device has a simple structure and high reliability. Compared with the existing structure, it omits more connecting rod mechanisms, making overall debugging simpler and more convenient.

[0013] Furthermore, since there are two active drive plates arranged in parallel and mirror image, with the rack fixed on one of the active drive plates, the active drive plates are connected by a central connecting shaft, the driven plate is located between the two active drive plates, and there are two drive pins fixed on both sides of the driven plate respectively, with the drive pins extending into the drive grooves of the corresponding active drive plates, the power transmission between the active drive plates and the driven plates is smoother, and the force on the bottom mold lifting frame is more uniform.

[0014] Furthermore, since the lifting base plate is provided with a vertically arranged mounting shaft, the driven plate is fixed on the mounting shaft, and an auxiliary guide mechanism is also provided between the driven plate and the base, the auxiliary guide mechanism includes a vertical auxiliary guide rod fixed on the base, and an auxiliary guide sleeve that cooperates with the auxiliary guide rod is provided on the driven plate. Therefore, the lifting of the driven plate can be further guided by this auxiliary guide mechanism to ensure reliable lifting action.

[0015] Furthermore, since the first drive motor is fixed to the base via the first motor mount, and the first motor mount is provided with a guide block, and the guide block is provided with a guide groove that cooperates with the rack, the guide block can limit the rack while guiding it, thereby ensuring that the force on both ends of the rack is more reasonable. Attached Figure Description

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

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

[0018] Figure 2 This is a schematic diagram of the bottom mold assembly, the first driving device, and the base, etc., of an embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the bottom mold assembly and the first driving device according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the bottom mold assembly according to an embodiment of the present invention;

[0021] In the attached figures: 1. First mold frame; 2. Second mold frame; 3. Bottom mold assembly; 31. Bottom mold mounting plate; 32. Bottom mold; 33. Bottom mold lifting frame; 331. Lifting base plate; 332. Vertical guide rod; 4. Base; 5. First half mold; 6. First drive motor; 7. Second drive device; 8. Active drive plate; 9. Drive groove; 10. Drive pin; 11. Rack; 12. First crank-connecting rod mechanism; 121. First crank; 122. First drive connecting rod; 123. First left opening and closing connecting rod; 124. First right opening and closing connecting rod; 125. First intermediate connecting rod; 13. Drive gear; 14. Driven plate; 15. Intermediate connecting shaft; 16. First motor base; 17. Mounting shaft; 18. Auxiliary guide rod; 19. First strip hole; 20. First fixed seat. Detailed Implementation

[0022] The present invention will be further described in detail below through specific embodiments.

[0023] like Figure 1-4As shown, a mold opening and closing device for a blow molding machine includes a mold opening and closing frame and a bottom mold assembly 33 for linkage opening and closing. The mold opening and closing frame includes a first mold frame 1 and a second mold frame 2 slidably disposed on a base 4. The bottom mold 32 is liftably disposed on the base 4. A first half mold 5 and a second half mold that cooperate with each other are respectively fixed on the first mold frame 1 and the second mold frame 2. The bottom mold assembly 33 is liftably installed on the base 4 between the first half mold 5 and the second half mold. The first mold frame 1 and the second mold frame 2 are driven to move closer to each other or separate by a first driving device and a second driving device 7, respectively. The bottom mold assembly 33 includes a bottom mold mounting plate 31. A plurality of bottom molds 32 are fixedly installed on the top of the bottom mold mounting plate 31. The bottom mold is lifted and installed on the base 4 via the bottom mold lifting frame 33. The active drive plate 8 is horizontally slidably installed on the base 4. The active drive plate 8 is provided with a drive groove 9, which includes a horizontal groove section and an inclined groove section with a vertical drop. The bottom mold lifting frame 33 is provided with a drive pin 10 located in the drive groove 9. A rack 11 is fixed on the active drive plate 8. The first drive device includes a first drive motor 6. The first drive motor 6 drives the first mold frame 1 to move horizontally through a first crank connecting rod mechanism 12. The drive shaft of the first drive motor 6 is connected to the first crank 121 of the first crank connecting rod mechanism 12. A drive gear 13 that is connected to the rack 11 is also fixed on the drive shaft of the first drive motor 6.

[0024] In this embodiment, the bottom mold lifting frame 33 includes a lifting base plate 331, which is fixedly connected to the bottom mold mounting plate 31 via several vertical guide rods 332. A driven plate 14 is fixedly mounted on the lifting base plate 331, and the drive pin 10 is mounted on the driven plate 14. There are two active drive plates 8 arranged parallel and mirror images of each other. The rack 11 is fixed on one of the active drive plates 8. The active drive plates 8 are connected by an intermediate connecting shaft 15. The driven plate 14 is located between the two active drive plates 8. There are two drive pins 10, which are fixed on both sides of the driven plate 14 respectively. The drive pins 10 extend into the drive grooves 9 of the corresponding active drive plate 8. A vertically arranged mounting shaft 17 is provided on the lifting base plate 331, and the driven plate 14 is fixed on the mounting shaft 17. An auxiliary guide mechanism is also provided between the driven plate 14 and the base 4. The auxiliary guiding mechanism includes a vertical auxiliary guide rod 18 fixed on the base 4, and an auxiliary guide sleeve that cooperates with the auxiliary guide rod 18 is provided on the driven plate 14.

[0025] In this embodiment, the first crank-connecting rod mechanism 12 includes a first crank 121, a first driving connecting rod 122, several first left-opening connecting rods 123 and first right-opening connecting rods 124, and several first intermediate connecting rods 125. The first crank 121 is fixed on the drive shaft of the first drive motor 6. The lower end of the first driving connecting rod 122 is hinged to the first crank 121. The base 4 is provided with a first strip-shaped hole 19 to facilitate the upward extension and penetration of the first driving connecting rod 122. The base 4 is provided with a first fixed seat 20 and a second fixed seat. The first fixed seat 20 is located outside the first mold frame 1. On the side, the second fixed seat is located outside the second mold frame 2. One end of the first left opening and closing connecting rod 123 is hinged to the first fixed seat 20; the other end of the first left opening and closing connecting rod 123 is hinged to the first intermediate connecting rod 125; one end of the first right opening and closing connecting rod 124 is hinged to the first mold frame 1, and the other end of the first right opening and closing connecting rod 124 is also hinged to the first intermediate connecting rod 125. The first left opening and closing connecting rods 123 are arranged in parallel, and the first right opening and closing connecting rods 124 are arranged in parallel. The upper end of the first driving connecting rod 122 is hinged to the middle of the lowermost first intermediate connecting rod 125. The second crank connecting rod mechanism has the same structure as the first crank connecting rod mechanism 12, and will not be described again.

[0026] The first drive motor 6 is fixed to the base 4 via a first motor mount 16. The first motor mount 16 is provided with a guide block, and the guide block is provided with a guide groove that cooperates with the rack 11. The structure of the second drive device 7 is similar to that of the first drive device. The second drive device 7 does not include the guide block, rack 11, and drive gear 13, etc., and will not be described in detail here.

[0027] To facilitate the demonstration of other structures, Figure 1 The second half of the model is omitted and not drawn.

[0028] During use, such as Figure 1As shown, when mold closing is required, the first drive motor 6 drives the output shaft to rotate, which drives the first mold frame 1 to move horizontally to the right through the first crank connecting rod mechanism 12, and the first half mold 5 to move horizontally to the right. At the same time, the rotation of the output shaft of the first drive motor 6 also drives the drive gear 13 to rotate. The drive gear 13 drives the rack 11 to move, and the movement of the rack 11 drives the active drive plate 8 to move horizontally. In this way, the drive groove 9 drives the drive pin 10 to move, and finally drives the bottom mold mounting plate 31 to rise vertically, realizing the rise of the bottom mold 32. It can be seen that the first drive device of this invention can drive the first plate mold 5 to move horizontally and drive the bottom mold 32 to rise vertically. At the same time, the second drive device drives the second mold frame 2 to move horizontally to the left through the second crank-connecting rod mechanism, and the second half mold moves horizontally to the left. That is, the first half mold 5 moves horizontally to the right, the second half mold moves horizontally to the left, and the bottom mold 32 rises to achieve the mold closing state. Similarly, when the mold needs to be opened, the first drive device and the second drive device drive the first half mold 5 to move horizontally to the left and the second half mold to move horizontally to the right at the same time, and the bottom mold 32 descends to achieve the mold opening state.

[0029] The servo motor and other actuators, gear transmission mechanisms, and lead screw and nut mechanisms mentioned in this embodiment are all current conventional technologies. The 5th edition of the "Mechanical Design Handbook" published in Beijing in April 2008 (5th edition, 28th printing) details the specific structure, principles, and other designs of cylinders, motors, and other transmission mechanisms, which are existing technologies with clear and straightforward structures. The 3rd edition of "Modern Practical Pneumatic Technology" SMC training materials published by Machinery Industry Press on August 1, 2008, details vacuum components, gas circuits, and program control, indicating that the air circuit structure in this embodiment is also existing technology and clear and straightforward. The book "Motor Drive and Speed ​​Regulation" published by Chemical Industry Press on July 1, 2015, also details motor control and limit switches. Therefore, the circuit and air circuit connections are clear.

[0030] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and alterations to the technical solution of the present utility model without departing from its design spirit shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. A mold opening and closing device for a blow molding machine, comprising a mold opening and closing frame and a bottom mold assembly for linkage opening and closing, wherein the mold opening and closing frame includes a first mold frame and a second mold frame slidably disposed on a base, the bottom mold assembly is liftably disposed on the base, a first half mold and a second half mold that cooperate with each other are respectively fixed on the first mold frame and the second mold frame, the bottom mold assembly is liftably mounted on the base between the first half mold and the second half mold, the first mold frame and the second mold frame are respectively driven by a first driving device and a second driving device to move closer to each other or separate, characterized in that: The bottom mold assembly includes a bottom mold mounting plate. Several bottom molds are fixedly mounted on top of the bottom mold mounting plate. The bottom mold mounting plate is lifted and lowered onto the base via a bottom mold lifting frame. An active drive plate is horizontally slidably mounted on the base. The active drive plate is provided with a drive groove, which includes a horizontal groove section and an inclined groove section with a vertical drop. A drive pin is provided on the bottom mold lifting frame within the drive groove. A rack is fixed on the active drive plate. The first drive device includes a first drive motor, which drives the first mold frame to move horizontally via a first crank-connecting rod mechanism. The drive shaft of the first drive motor is connected to the crank of the first crank-connecting rod mechanism. A drive gear, which is connected to the rack, is also fixed on the drive shaft of the first drive motor. The second drive device includes a second drive motor, which drives the second mold frame to move horizontally via a second crank-connecting rod mechanism. The drive shaft of the second drive motor is connected to the crank of the second crank-connecting rod mechanism.

2. The mold opening and closing device for a blow molding machine as described in claim 1, characterized in that: The bottom mold lifting frame includes a lifting base plate, which is fixedly connected to the bottom mold mounting plate by several vertical guide rods. A driven plate is fixedly installed on the lifting base plate, and the drive pin is installed on the driven plate.

3. The mold opening and closing device for a blow molding machine as described in claim 2, characterized in that: The active drive plates are two in number and arranged in parallel and mirror image. The rack is fixed on one of the active drive plates. The active drive plates are connected by an intermediate connecting shaft. The driven plate is located between the two active drive plates. There are two drive pins, which are fixed on both sides of the driven plate respectively. The drive pins extend into the drive groove of the corresponding active drive plate.

4. The mold opening and closing device for a blow molding machine as described in claim 3, characterized in that: The lifting base plate is provided with a vertically arranged mounting shaft, the driven plate is fixed on the mounting shaft, and an auxiliary guide mechanism is also provided between the driven plate and the base.

5. The mold opening and closing device for a blow molding machine as described in claim 4, characterized in that: The auxiliary guiding mechanism includes a vertical auxiliary guide rod fixed on the base, and the driven plate is provided with an auxiliary guide sleeve that cooperates with the auxiliary guide rod.

6. The mold opening and closing device for a blow molding machine as described in claim 5, characterized in that: The first crank-connecting rod mechanism includes a first crank, a first drive connecting rod, several first left-opening and closing connecting rods and first right-opening and closing connecting rods, and several first intermediate connecting rods. The first crank is fixed to the drive shaft of the first drive motor. The lower end of the first drive connecting rod is hinged to the first crank. The base is provided with a first strip-shaped hole to facilitate the upward extension and penetration of the first drive connecting rod. The base is provided with a first fixed seat located outside the first mold frame. One end of the first left-opening and closing connecting rod is hinged to the first fixed seat; the other end of the first left-opening and closing connecting rod is hinged to the first intermediate connecting rod; one end of the first right-opening and closing connecting rod is hinged to the first mold frame; the other end of the first right-opening and closing connecting rod is also hinged to the first intermediate connecting rod. The first left-opening and closing connecting rods are arranged in parallel, and the first right-opening and closing connecting rods are arranged in parallel. The upper end of the first drive connecting rod is hinged to the middle of the lowermost first intermediate connecting rod.

7. The mold opening and closing device for a blow molding machine as described in claim 1, characterized in that: The first drive motor is fixed to the base by a first motor mount. The first motor mount is provided with a guide block, and the guide block is provided with a guide groove that cooperates with the rack.

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