Bottle blank stretching device of bottle blowing machine

Abstract

The utility model provides a bottle blank stretching device of a bottle blowing machine. The bottle blank stretching device comprises a mold frame, a sealing cylinder, a stretching rod and a driving mechanism, the driving mechanism comprises a mounting plate fixedly arranged at the lower end of the mold frame, a connecting plate slidably arranged on the side portion of the mounting plate, a transmission rack fixedly arranged at the lower end of the connecting plate, a supporting plate fixedly arranged at the lower end of the mounting plate, a servo motor fixedly arranged at the upper end of the supporting plate and a transmission gear fixedly arranged at the output end of the servo motor. A connecting opening is formed in the side portion of the connecting plate in a penetrating mode, the side portion of the transmission gear penetrates through the connecting opening and is meshed with the transmission rack, an abutting mechanism is arranged at the upper end of the supporting plate, and the abutting mechanism abuts against the side, away from the transmission gear, of the transmission rack and is used for pressing the transmission rack to the transmission gear. The abutting mechanism can support and limit the end, away from the connecting plate, of the transmission rack, so that the transmission rack is not prone to shifting in the moving process, and the use stability of the bottle blank stretching device is not prone to being affected.

Description

Technical Field

[0001] This utility model relates to blow molding machine accessories, and in particular, to a blow molding machine preform stretching device. Background Art

[0002] Currently, Chinese patent CN214645782U discloses a servo stretching and sealing mechanism for preforms in a blow molding machine. The mechanism includes a mold frame, a sealing cylinder mounted on the mold frame, a stretching rod extending into the sealing cylinder, and a driving component mounted on the mold frame to drive the stretching rod to slide. The driving component includes a mounting plate fixed to the mold frame, a connecting plate slidably connected to the mounting plate, a transmission rack fixed to the connecting plate, a transmission gear rotatably connected to the mounting plate and meshing with the transmission rack, and a drive motor for driving the transmission gear to rotate. The stretching rod is connected to the connecting plate. However, because the side of the transmission rack away from the connecting plate is not effectively supported and limited, the end of the transmission rack away from the connecting plate is prone to lateral displacement during use. With increasing usage time, the transmission rack may separate from the connecting plate, affecting the stability of the stretching and sealing mechanism. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a preform stretching device for a blow molding machine, which has the advantage of being less affected by the stability of use.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a preform stretching device for a blow molding machine, comprising a mold frame, a sealing cylinder fixedly disposed at the lower end of the inner side of the mold frame, a stretching rod extending from bottom to top into the sealing cylinder, and a driving mechanism fixedly disposed at the lower end of the mold frame for driving the stretching rod to slide up and down. The driving mechanism includes a mounting plate fixedly disposed at the lower end of the mold frame, a connecting plate slidably disposed on the side of the mounting plate in a vertical direction, a transmission rack fixedly disposed at the lower end of the connecting plate, a support plate fixedly disposed at the lower end of the mounting plate, and a support plate fixedly disposed on the support plate. The upper end has a servo motor and a transmission gear fixedly mounted on the output end of the servo motor. A connecting opening is provided through the side of the connecting plate. The servo motor is located on the side of the mounting plate away from the connecting plate. The side of the transmission gear passes through the connecting opening and meshes with the transmission rack. A movable opening is provided through the upper end of the support plate. The lower end of the transmission rack can pass through the movable opening. A backing mechanism is provided at the upper end of the support plate. The backing mechanism abuts against the side of the transmission rack away from the transmission gear to press the transmission rack against the transmission gear.

[0005] Through the above technical solution, the abutting mechanism abuts against the transmission rack, pressing the transmission rack against the transmission gear. This abutting mechanism supports and limits the end of the transmission rack away from the connecting plate, preventing the transmission rack from shifting during movement and minimizing disruption to the stability of the preform stretching device. The servo motor is mounted on the upper part of the support plate, offering advantages such as convenient assembly and disassembly and high stability. One side of the transmission gear passes through the connecting opening and meshes with the transmission rack. This proximity of the meshing point between the transmission gear and the transmission rack to the mounting plate minimizes contact with other objects and reduces the impact on the transmission process.

[0006] Preferably, the abutting mechanism includes an abutting seat fixedly connected to the upper end of the support plate and an abutting wheel rotatably connected to the middle of the abutting seat, wherein the outer wall of the abutting wheel abuts against the side of the transmission rack away from the transmission gear.

[0007] Through the above technical solution, the abutting wheel and the abutting seat are rotatably connected, which can change the friction between the abutting mechanism and the transmission gear from sliding friction to rolling friction, making the movement of the transmission rack smoother.

[0008] Preferably, a connecting shaft is fixedly provided in the middle of the abutment seat, the abutment wheel is a bearing, the inner ring of the bearing is fixedly sleeved on the outside of the connecting shaft, and the outer ring of the bearing abuts against the transmission rack on the side away from the transmission gear.

[0009] The above technical solution uses bearings as the abutment wheel, which has the advantage of convenient procurement.

[0010] Preferably, a limiting plate is provided at the upper end of the support plate, and a limiting hole is provided through the limiting plate, and the end of the servo motor is fixedly disposed in the limiting hole.

[0011] Through the above technical solution, the limiting plate can be used to support and limit the servo motor, thereby improving the installation stability of the servo motor.

[0012] Preferably, the sidewall of the limiting plate is fixedly connected to the mounting plate.

[0013] The above technical solution allows the sidewall of the limiting plate to be fixedly connected to the mounting plate, thereby improving the connection strength between the mounting plate and the support plate.

[0014] Preferably, a support wing plate is fixedly provided between the support plate and the limiting plate, and the support wing plate is located on the side of the transmission gear away from the limiting plate.

[0015] Through the above technical solution, the support wing plate can improve the connection stability between the mounting plate and the support plate. The support wing plate is located on the side of the transmission gear away from the limiting plate, and can cooperate with the limiting plate to more effectively replace the connection stability between the mounting plate and the support plate.

[0016] Preferably, the mounting plate is provided with two limiting blocks on the side near the connecting plate. The two limiting blocks are respectively located on both sides of the transmission rack and abut against the side wall of the transmission rack.

[0017] Through the above technical solution, the two limiting blocks located on both sides of the transmission rack can limit the transmission rack, making it less likely for the transmission rack to deviate during movement, and making the stability of the above preform stretching device less likely to be affected.

[0018] Preferably, a positioning groove is provided at the position opposite to the limiting block of the transmission rack, the positioning groove extends along the length direction of the transmission rack, and a positioning ball is ball-connected at the position opposite to the transmission rack of the limiting block, the outer wall of the positioning ball abutting against the inner wall of the positioning groove.

[0019] Through the above technical solution, the positioning ball and the positioning groove cooperate to not only limit the movement of the transmission rack, making it less likely for the transmission rack to deviate during the movement, but also improve the smoothness of the transmission rack movement. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0021] Figure 2 This is a partial cross-sectional view of an embodiment;

[0022] Figure 3 This is a partial illustration of an embodiment. Figure 1 ;

[0023] Figure 4 This is a partial illustration of an embodiment. Figure 2 .

[0024] Reference numerals: 1. Mold frame; 2. Sealing cylinder; 3. Tensioning rod; 4. Drive mechanism; 41. Mounting plate; 42. Connecting plate; 43. Transmission rack; 44. Support plate; 45. Servo motor; 46. Transmission gear; 5. Connecting opening; 6. Movable opening; 7. Abutting mechanism; 71. Abutting seat; 72. Abutting wheel; 8. Connecting shaft; 9. Limiting plate; 10. Limiting hole; 11. Support wing plate; 12. Limiting block; 13. Positioning groove; 14. Ball bearing. DETAILED DESCRIPTION

[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0026] A preform stretching device for a blow molding machine, such as Figures 1 to 4As shown, the device includes a mold frame 1, a sealing cylinder 2 fixedly disposed at the lower inner side of the mold frame 1, a tension rod 3 extending from bottom to top into the sealing cylinder 2, and a drive mechanism 4 fixedly disposed at the lower end of the mold frame 1 to drive the tension rod 3 to slide up and down. In use, the drive mechanism 4 can be moved upward to assist in the blow molding of the preform.

[0027] The drive mechanism 4 includes a mounting plate 41 fixedly mounted at the lower end of the mold frame 1, a connecting plate 42 slidably mounted on the side of the mounting plate 41 in a vertical direction, a transmission rack 43 fixedly mounted at the lower end of the connecting plate 42, a support plate 44 fixedly mounted at the lower end of the mounting plate 41, a servo motor 45 fixedly mounted on the upper end of the support plate 44, and a transmission gear 46 fixedly mounted at the output end of the servo motor 45. A connecting opening 5 is provided through the side of the connecting plate 42. The servo motor 45 is located on the side of the mounting plate 41 away from the connecting plate 42. The side of the transmission gear 46 passes through the connecting opening 5 and meshes with the transmission rack 43. A movable opening 6 is provided through the upper end of the support plate 44, through which the lower end of the transmission rack 43 can pass. A backing mechanism 7 is provided at the upper end of the support plate 44. The backing mechanism 7 abuts against the side of the transmission rack 43 away from the transmission gear 46, thereby pressing the transmission rack 43 against the transmission gear 46.

[0028] The abutting mechanism 7 includes an abutting seat 71 fixedly connected to the upper end of the support plate 44 and an abutting wheel 72 rotatably connected to the middle of the abutting seat 71. The outer wall of the abutting wheel 72 abuts against the side of the transmission rack 43 away from the transmission gear 46. A connecting shaft 8 is fixedly installed in the middle of the abutting seat 71. The abutting wheel 72 is a bearing. The inner ring of the bearing is fixedly sleeved on the outer side of the connecting shaft 8. The outer ring of the bearing abuts against the side of the transmission rack 43 away from the transmission gear 46.

[0029] A limiting plate 9 is provided at the upper end of the support plate 44, and a limiting hole 10 is provided through the limiting plate 9. The end of the servo motor 45 is fixedly installed in the limiting hole 10. The side wall of the limiting plate 9 is fixedly connected to the mounting plate 41.

[0030] A support wing plate 11 is fixedly installed between the support plate 44 and the limiting plate 9. The support wing plate 11 is located on the side of the transmission gear 46 away from the limiting plate 9.

[0031] Two limiting blocks 12 are provided on the mounting plate 41 near the connecting plate 42. The two limiting blocks 12 are respectively located on both sides of the transmission rack 43 and abut against the side wall of the transmission rack 43. A positioning groove 13 is provided on the transmission rack 43 opposite to the limiting blocks 12. The positioning groove 13 extends along the length of the transmission rack 43. A positioning ball 14 is ball-jointed on the limiting block 12 opposite to the transmission rack 43. The outer wall of the positioning ball 14 abuts against the inner wall of the positioning groove 13.

[0032] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A preform stretching device for a blow molding machine, comprising a mold frame (1), a sealing cylinder (2) fixedly disposed at the lower end of the inner side of the mold frame (1), a stretching rod (3) extending from bottom to top into the sealing cylinder (2), and a driving mechanism (4) fixedly disposed at the lower end of the mold frame (1) for driving the stretching rod (3) to slide up and down, characterized in that: The drive mechanism (4) includes a mounting plate (41) fixedly disposed at the lower end of the mold frame (1), a connecting plate (42) slidably disposed on the side of the mounting plate (41) in the vertical direction, a transmission rack (43) fixedly disposed at the lower end of the connecting plate (42), a support plate (44) fixedly disposed at the lower end of the mounting plate (41), a servo motor (45) fixedly disposed at the upper end of the support plate (44), and a transmission gear (46) fixedly disposed at the output end of the servo motor (45). A connecting opening (5) is provided through the side of the connecting plate (42), and the servo motor (45) is positioned... On the side of the mounting plate (41) away from the connecting plate (42), the side of the transmission gear (46) passes through the connecting opening (5) and meshes with the transmission rack (43). The upper end of the support plate (44) is provided with a movable opening (6), and the lower end of the transmission rack (43) can pass through the movable opening (6). The upper end of the support plate (44) is provided with a backing mechanism (7), which abuts against the side of the transmission rack (43) away from the transmission gear (46) to press the transmission rack (43) against the transmission gear (46).

2. The bottle preform stretching device for a blow molding machine according to claim 1, characterized in that: The abutting mechanism (7) includes an abutting seat (71) fixedly connected to the upper end of the support plate (44) and an abutting wheel (72) rotatably connected to the middle of the abutting seat (71). The outer wall of the abutting wheel (72) abuts against the side of the transmission rack (43) away from the transmission gear (46).

3. The bottle preform stretching device for a blow molding machine according to claim 2, characterized in that: A connecting shaft (8) is fixedly provided in the middle of the abutment seat (71), the abutment wheel (72) is a bearing, the inner ring of the bearing is fixedly sleeved on the outside of the connecting shaft (8), and the outer ring of the bearing abuts against the transmission rack (43) on the side away from the transmission gear (46).

4. The bottle preform stretching device for a blow molding machine according to claim 1, characterized in that: The upper end of the support plate (44) is provided with a limiting plate (9), and the limiting plate (9) is provided with a limiting hole (10) through it. The end of the servo motor (45) is fixedly installed in the limiting hole (10).

5. The bottle preform stretching device for a blow molding machine according to claim 4, characterized in that: The side wall of the limiting plate (9) is fixedly connected to the mounting plate (41).

6. The preform stretching device for a blow molding machine according to claim 5, characterized in that: A support wing plate (11) is fixedly provided between the support plate (44) and the limiting plate (9), and the support wing plate (11) is located on the side of the transmission gear (46) away from the limiting plate (9).

7. The bottle preform stretching device for a blow molding machine according to claim 1, characterized in that: The mounting plate (41) is provided with two limiting blocks (12) on the side near the connecting plate (42). The two limiting blocks (12) are respectively located on both sides of the transmission rack (43) and abut against the side wall of the transmission rack (43).

8. The bottle preform stretching device for a blow molding machine according to claim 7, characterized in that: A positioning groove (13) is provided at the position opposite to the limiting block (12) of the transmission rack (43). The positioning groove (13) extends along the length direction of the transmission rack (43). A positioning ball (14) is ball-jointed at the position opposite to the transmission rack (43) of the limiting block (12). The outer wall of the positioning ball (14) abuts against the inner wall of the positioning groove (13).

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