Feeding device of bottle blowing machine

Abstract

The utility model discloses a feeding device of a bottle blowing machine, which comprises a base, an inclined bottle blank slide way is fixedly mounted on the base, an outlet of the bottle blank slide way is connected with a blank separating mechanism, the blank separating mechanism comprises a blank separating block horizontally mounted on the base in a sliding manner, and a plurality of bottle blank clamping grooves are formed in the blank separating block. A bottle blank clamping groove of the blank separating block faces one side and is connected with an outlet of the bottle blank sliding way, the blank separating block is driven by a horizontal reciprocating driving device, an auxiliary limiting device and an auxiliary backup plate horizontally sliding on the limiting device are installed on the side, located on the blank separating block, of the base, and the auxiliary backup plate is driven by an auxiliary linear power device. The auxiliary backup plate leans against the bottle blanks in the bottle blank clamping grooves when approaching the blank separation blocks; a bottle blank clamping and overturning mechanism is installed on the base and located on the other side of the blank separating block, and a feeding blocking device used for blocking the bottle blanks, close to the outlet, of the bottle blank sliding way is further installed on the base. The feeding device is simpler in structure and can more accurately achieve feeding of the bottle blanks.

Description

Technical Field

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

[0002] Currently, most blow molding machines use slide-type preform feeding devices, which are simple in structure and low in cost. However, this gravity-based feeding device cannot control the feeding speed and quantity. For example, the utility model patent with authorization number CN217916709U discloses a preform feeding device that places the preform on an inclined slide and then continuously conveys it by its own gravity. The preform slots are driven by a chain to rotate cyclically, thus conveying the preforms one by one. When a preform does not correspond to a preform slot, it is supported and blocked by the solid blocks between the preform slots, so the preform stops at the arc-shaped deflector. However, this structure cannot control the feeding action of the preform, and the bottle neck is also prone to wear, affecting the appearance.

[0003] Furthermore, the chain-driven cyclic operation requires the preform slots to be accurately positioned for the preform clamping and flipping mechanism to hold and flip the preforms. However, over time, the chain connections can loosen, causing the pitch between chain links to lengthen. This alters the spacing between the preform slots, affecting the accuracy of the preform clamping and flipping mechanism. Simultaneously, the circulating chain requires additional sensors to accurately position the preform slots, such as by detecting the position of a single preform slot. However, the spacing between the preform slots can change due to chain link wear, potentially leading to poor engagement between the preform slots and the preform clamping and flipping mechanism over extended use. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a feeding device for a blow molding machine, which has a simpler structure and can more accurately feed bottle preforms.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a feeding device for a blow molding machine, including a base, on which an inclined preform slide is fixedly installed. The outlet of the preform slide is connected to a preform separating mechanism. The preform separating mechanism includes a preform separating block horizontally slidably installed on the base. The preform separating block is provided with multiple preform slots. The preform slots of the preform separating block face one side and are connected to the outlet of the preform slide. The preform separating block is driven by a horizontal reciprocating drive device. An auxiliary limiting device is installed on one side of the preform separating block on the base. The limiting device has a horizontally slidable auxiliary support plate. The auxiliary support plate is driven by an auxiliary linear power device to move closer to or away from the preform separating block. When the auxiliary support plate moves closer to the preform separating block, it relies on the preform in the preform slot. A preform clamping and flipping mechanism for clamping and flipping the preform in the preform slot is installed on the other side of the preform separating block on the base. A feeding blocking device for blocking the preform from moving closer to the outlet of the preform slide is also installed on the base.

[0006] As a preferred embodiment, the feeding blocking device includes a blocking base fixedly installed on the base, a blocking support installed on the blocking base, a blocking shaft axially slidably installed on the blocking support, the blocking shaft being driven to extend and retract by a telescopic power device, the blocking shaft being inclined, and the free end of the blocking shaft being configured as a pointed tip facing the outlet of the inclined preform slide to block the preform from the outlet.

[0007] As a preferred embodiment, the blocking support is U-shaped, the telescopic power device is a cylinder and is fixedly installed on one groove wall plate of the blocking support, a bushing is installed on the other groove wall plate of the blocking support, the blocking shaft is axially slidably installed in the bushing, the blocking shaft is fixedly connected to the piston rod of the cylinder, and the blocking support is connected to the blocking base through an angle adjustment structure.

[0008] As a preferred embodiment, the angle adjustment structure includes an adjustment seat mounted on the blocking base. The blocking support is hinged to the adjustment seat on the side near the preform slide. The adjustment seat has a strip-shaped hole. An adjustment rod is hinged to the side of the blocking support away from the preform slide. The adjustment rod is inserted into the strip-shaped hole and locked in place by a nut.

[0009] As a preferred embodiment, a vertical rod is fixedly installed on the adjusting seat, and a locking block is provided on the blocking base. The locking block and the blocking base are provided with clamping arc surfaces that cooperate to clamp the vertical rod. The locking block is fixed to the blocking base by locking bolts.

[0010] As a preferred embodiment, the blocking base is fixed to the base by adjusting bolts, and the blocking base is provided with parallel waist holes, the extension direction of the waist holes facing the preform slide, and the adjusting bolts are constrained within the waist holes.

[0011] As a preferred embodiment, the auxiliary backrest is horizontally slidably mounted on a backrest bracket. The backrest bracket includes an L-shaped first backrest support rod, a second backrest support rod, and a horizontal mounting beam. The horizontal rod portions of the first and second backrest support rods are provided with horizontal adjustment slots. The horizontal rod portions are fixed to the base by bolts constrained within the horizontal adjustment slots. The vertical rod portions of the first and second backrest support rods are provided with vertical adjustment slots. The horizontal mounting beam is fixed to the first and second backrest support rods by bolts constrained within the vertical adjustment slots. The auxiliary backrest is horizontally slidably mounted on the horizontal mounting beam via a guide rod. The auxiliary linear power device is fixed on the horizontal mounting beam.

[0012] As a preferred embodiment, the base is provided with a slide plate, which includes an inclined plate portion and a horizontal plate portion. The preform slide is disposed on the slide plate, and the preform slide includes an inclined slide section disposed on the inclined plate portion and a curved channel section disposed on the horizontal plate portion. The preform dividing block is provided with an auxiliary support plate surface, the preform dividing block is located below the slide plate, and the auxiliary support plate surface partially covers the curved channel section. The feeding blocking device blocks the preform at the lower end of the inclined slide section.

[0013] After adopting the above technical solution, the effect of this utility model is as follows: The preform separating mechanism includes a preform separating block horizontally slidably mounted on the base. The preform separating block is provided with multiple preform slots. The preform slots of the preform separating block face one side and connect to the outlet of the preform slide. The preform separating block is driven by a horizontal reciprocating drive device. An auxiliary limiting device is installed on one side of the preform separating block on the base. The limiting device slides horizontally on an auxiliary support plate. The auxiliary support plate is driven by an auxiliary linear power device to move closer to or away from the preform separating block. When the auxiliary support plate approaches the preform separating block, it relies on the preform in the preform slot. A preform clamping and flipping mechanism for clamping and flipping the preform in the preform slot is installed on the other side of the preform separating block on the base. A feeding blocking device for blocking preforms near the outlet of the preform slide is also installed on the base. Therefore, the feeding device can block preforms on the preform slide using the feeding blocking device, and the horizontally reciprocating preform separating block can be used for accurate preform separating. During the feeding process, as the preform block slides horizontally to the connecting feeding position, the preform, relying on its own weight, enters the preform slot of the preform block along the preform slide. The spacing between the preform slots on the preform block remains constant, so the spacing between the preforms also remains constant, which allows for better matching with the preform clamping and flipping mechanism. At the same time, when the preform clamping and flipping mechanism clamps the preform, the auxiliary plate moves away from the preform block, so as not to hinder the flipping of the preform clamping and flipping mechanism. When the preform is flipped and sent out, the preform block is driven to reset by the horizontal reciprocating drive device. Before resetting, the feeding blocking device can block the preform, which can prevent the preform from slipping into the preform slot. Since the horizontal reciprocating drive device only needs to ensure that the preform block moves back and forth between two positions, the accuracy is higher, and the distance between the preform slots on the preform block remains stable during long-term use. Therefore, this feeding device has a more reasonable structure and higher reliability than existing feeding devices.

[0014] Furthermore, the feeding blocking device includes a blocking base fixedly installed on the base, a blocking support installed on the blocking base, and a blocking shaft axially slidably installed on the blocking support. The blocking shaft is driven to extend and retract by a telescopic power device. The blocking shaft is inclined, and the free end of the blocking shaft is set as a pointed tip facing the outlet of the inclined preform slide to block the preform from the outlet. The pointed tip of the inclined blocking shaft can be accurately inserted into the gap between preforms, resulting in a smaller contact surface with the preform and reduced friction.

[0015] Furthermore, due to the U-shaped groove of the blocking support, the telescopic power device is a cylinder and is fixedly installed on one groove wall plate of the blocking support. A bushing is installed on the other groove wall plate of the blocking support. The blocking shaft is axially slidably installed in the bushing. The blocking shaft is fixedly connected to the piston rod of the cylinder. The blocking support is connected to the blocking base through an angle adjustment structure. The angle adjustment structure can be used to adjust the angle of the blocking shaft, thereby more accurately inserting it into the gap between the preforms.

[0016] Furthermore, the angle adjustment structure includes an adjustment seat mounted on the blocking base. The blocking support is hinged to the adjustment seat on the side near the preform slide. The adjustment seat has a slotted hole, and an adjustment rod is hinged to the side of the blocking support away from the preform slide. The adjustment rod is inserted into the slotted hole and locked in place by a nut. By simply loosening the nut, the adjustment rod can move within the slotted hole and adjust its vertical position, thereby changing the angle between the blocking support and the adjustment seat. This changes the tilt angle of the blocking shaft, ensuring optimal insertion angle for the blocking mechanism.

[0017] Furthermore, since a vertical rod is fixedly installed on the adjusting seat, and a locking block is provided on the blocking base, the locking block and the blocking base are provided with clamping arc surfaces that cooperate to clamp the vertical rod. The locking block is fixed to the blocking base by locking bolts. By loosening the locking bolts, the locking block can release the vertical rod, allowing the vertical rod to rotate around its own center line. This further changes the angle of the blocking shaft, further optimizing the insertion angle of the blocking shaft.

[0018] Furthermore, since the blocking base is fixed to the base by adjusting bolts, the blocking base is provided with parallel waist holes. The extension direction of the waist holes is towards the preform slide. The adjusting bolts are constrained in the waist holes. The installation position of the blocking base can be adjusted by using the waist holes, thereby adjusting the length of the contact part between the blocking shaft and the preform opening. This ensures that the preform can be effectively blocked without the contact part being too large and causing unnecessary wear.

[0019] Furthermore, since the auxiliary backing plate is horizontally slidably mounted on the backing plate bracket, which includes an L-shaped first backing plate support rod, a second backing plate support rod, and a horizontal mounting beam, the horizontal rods of the first and second backing plate support rods are provided with horizontal adjustment slots. The horizontal rods are fixed to the base by bolts constrained in the horizontal adjustment slots. The vertical rods of the first and second backing plate support rods are provided with vertical adjustment slots. The horizontal mounting beam is fixed to the first and second backing plate support rods by bolts constrained in the vertical adjustment slots. The auxiliary backing plate is horizontally slidably mounted on the horizontal mounting beam via a guide rod. The auxiliary linear power device is fixed on the horizontal mounting beam. Therefore, the positions of the first and second backing plate support rods and the height of the horizontal mounting beam can be adjusted through the horizontal and vertical adjustment slots, thereby allowing the auxiliary backing plate to better cooperate with the blank blocks.

[0020] Furthermore, since the base is equipped with a slide plate, which includes an inclined plate and a horizontal plate, the preform slide is set on the slide plate. The preform slide includes an inclined slide section on the inclined plate and a curved channel section on the horizontal plate. The preform dividing block is equipped with an auxiliary support plate. The preform dividing block is located below the slide plate, and the auxiliary support plate partially covers the curved channel section. The feeding blocking device blocks the preform at the lower end of the inclined slide section. In this way, when the preform dividing block slides into place, the preform slot is filled with preforms. The auxiliary support plate will block the curved channel section, thereby further ensuring that the preform does not move. At the same time, since the blocking shaft can be accurately inserted between preforms to block the inclined preform, the preform in the curved channel section is not squeezed and will be stationary in a horizontal state. This does not hinder the horizontal reset of the preform dividing block. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a three-dimensional structural view of an embodiment of the present utility model;

[0023] Figure 2 This is a perspective view of another embodiment of the present utility model;

[0024] Figure 3 This is a top view of an embodiment of the present utility model;

[0025] Figure 4 This is a perspective view of the blank-dividing mechanism according to an embodiment of the present utility model;

[0026] Figure 5 This is a schematic diagram of the feeding blocking device;

[0027] In the attached diagram: 1. Base; 2. Preform separating mechanism; 21. Preform separating block; 211. Preform slot; 212. Auxiliary support plate; 22. Rodless cylinder; 3. Auxiliary limiting device; 31. First support plate support rod; 32. Second support plate support rod; 33. Horizontal mounting beam; 34. Auxiliary support plate; 35. Auxiliary linear power device; 36. Horizontal adjustment slot; 37. Vertical adjustment slot; 4. Preform clamping and flipping mechanism; 41. Preform clamp; 42. Deflection shaft; 43. Deflection cylinder; 44. Lifting seat; 5. Feeding blocking device; 51. Blocking base; 52. Adjusting seat; 53. Blocking support; 54. Telescopic power device; 55. Blocking shaft; 56. Adjusting rod; 57. Nut; 58. Vertical rod; 59. Locking clamp block; 510. Locking bolt; 511. Waist hole; 512. Strip hole; 6. Slide plate; 61. Slide support; 62. Horizontal plate section; 63. Inclined slide section; 64. Turning arc passage section; 65. Inclined plate section. Detailed Implementation

[0028] The present invention will be further described in detail below through specific embodiments.

[0029] like Figures 1 to 5 As shown, a feeding device for a blow molding machine includes a base 1, on which an inclined preform slide is fixedly installed, and the outlet of the preform slide is connected to a preform separating mechanism 2.

[0030] The base 1 is equipped with a slide plate 6, which is fixed to the base 1 by a slide support 61. The slide plate 6 includes an inclined plate portion 65 and a horizontal plate portion 62. The preform slide is disposed on the slide plate 6, and the preform slide includes an inclined slide section 63 disposed on the inclined plate portion 65 and a curved channel section 64 disposed on the horizontal plate portion 62. The outlet of the curved channel section 64 is connected to the preform separating mechanism 2.

[0031] like Figures 1 to 4 As shown, the preform separating mechanism 2 includes a preform separating block 21 horizontally slidably mounted on the base 1. The preform separating block 21 has multiple preform slots 211, with each slot facing one side and connecting to the outlet of the preform slide. The preform separating block is driven by a horizontal reciprocating drive device, wherein in this embodiment, the horizontal reciprocating drive device is a rodless cylinder 22. An auxiliary support plate 212 is provided on the preform separating block 21. The preform separating block 21 is located below the slide plate 6, and the auxiliary support plate 212 partially covers the curved channel section 64. The feeding blocking device 5 blocks the preforms at the lower end of the inclined slide section 63.

[0032] like Figures 1 to 3As shown, an auxiliary limiting device 3 is installed on one side of the preform dividing block 21 on the base 1. The limiting device has a horizontally sliding auxiliary support plate 34. The auxiliary support plate 34 is driven by an auxiliary linear power device 35 to move closer to or away from the preform dividing block 21. The auxiliary linear power device 35 is preferably a cylinder. When the auxiliary support plate 34 is close to the preform dividing block, it relies on the preform in the preform slot 211. During the movement of the preform dividing block 21, the auxiliary support plate 34 assists in relying on the preform to prevent the preform from falling. On the other side of the preform dividing block 21 on the base 1, a preform clamping and flipping mechanism 4 is installed for clamping and flipping the preform in the preform slot 211. The base 1 is also equipped with a feeding blocking device 5 for blocking the preform from approaching the outlet of the preform slide.

[0033] The bottle preform clamping and flipping mechanism 4 in this embodiment has the same structure as the flipping mechanism described in the patent announcement number CN217916709U. It includes a lifting seat 44 driven by a lifting cylinder. A deflection shaft 42 driven by a deflection cylinder 43 is rotatably mounted on the lifting seat 44. Several bottle preform clamps 41 are fixed on the deflection shaft 42. The deflection cylinder 43 drives the deflection shaft 42 to deflect 180°. The lifting and lowering of the lifting seat 44 can facilitate the bottle preform clamps 41 to clamp the bottle preform and lift the bottle preform.

[0034] like Figure 5 As shown, the feeding blocking device 5 includes a blocking base 51 fixedly installed on the base 1, a blocking support 53 installed on the blocking base 51, and a blocking shaft 55 axially slidably installed on the blocking support 53. The blocking shaft 55 is driven to extend and retract by a telescopic power device 54. The blocking shaft 55 is inclined, and the free end of the blocking shaft 55 is set as a pointed tip and faces the outlet of the inclined preform slide to block the preform at the outlet.

[0035] The blocking support 53 has a U-shaped groove, the telescopic power device 54 is a cylinder and is fixedly installed on one groove wall plate of the blocking support 53, a bushing is installed on the other groove wall plate of the blocking support 53, the blocking shaft 55 is axially slidably installed in the bushing, the blocking shaft 55 is fixedly connected to the piston rod of the cylinder, and the blocking support 53 is connected to the blocking base 51 through an angle adjustment structure.

[0036] The angle adjustment structure includes an adjustment seat 52, which is mounted on the blocking base 51. A blocking support 53 is hinged to the adjustment seat 52 on the side near the preform slide. The adjustment seat 52 has a slotted hole 512. An adjustment rod 56 is hinged to the side of the blocking support 53 away from the preform slide. The adjustment rod 56 is inserted into the slotted hole 512 and locked in place by a nut 57. When angle adjustment is needed, simply loosen the nut 57. The adjustment rod 56 can then rise and fall while moving within the range of the slotted hole 512, thus satisfying the angle adjustment of the blocking support 53. After adjustment, tighten the nut 57.

[0037] A vertical rod 58 is fixedly installed on the adjusting seat 52, and a locking block 59 is provided on the blocking base 51. The locking block 59 and the blocking base 51 are provided with clamping arc surfaces that cooperate to clamp the vertical rod 58. The locking block 59 is fixed to the blocking base 51 by a locking bolt 510. After the locking bolt 510 is loosened, the vertical rod 58 can rotate around itself, thereby adjusting the angle of the blocking shaft 55 and optimizing the blocking insertion angle.

[0038] The blocking base 51 is fixed to the base 1 by adjusting bolts. The blocking base 51 is provided with parallel waist holes 511, the extension direction of which is towards the preform slide. The adjusting bolts are constrained within the waist holes 511. In this way, the position of the blocking base 51 is also adjustable.

[0039] like Figure 1 and Figure 2 As shown, the auxiliary backrest 34 is horizontally slidably mounted on the backrest bracket. The backrest bracket includes an L-shaped first backrest support rod 31, a second backrest support rod 32, and a horizontal mounting beam 33. The horizontal rod portions of the first backrest support rod 31 and the second backrest support rod 32 are provided with horizontal adjustment slots 36. The horizontal rod portions are fixed to the base 1 by bolts constrained in the horizontal adjustment slots 36. The vertical rod portions of the first backrest support rod 31 and the second backrest support rod 32 are provided with vertical adjustment slots 37. The horizontal mounting beam 33 is fixed to the first backrest support rod 31 and the second backrest support rod 32 by bolts constrained in the vertical adjustment slots 37. The auxiliary backrest 34 is horizontally slidably mounted on the horizontal mounting beam 33 via a guide rod. The auxiliary linear power device 35 is fixed on the horizontal mounting beam 33. The auxiliary linear power device 35 is preferably a cylinder, which drives the auxiliary backrest 34 to slide horizontally.

[0040] The working principle of this utility model is as follows: First, the preform is placed in the preform slide, the blocking shaft 55 blocks the preform, and the preform dividing block 21 is in the initial position, with the auxiliary plate 34 approaching the preform dividing block 21; then the blocking shaft 55 retracts, and the preform dividing block 21 moves to the right ( Figure 3 (In the placement state), when the preform slot 211 on the preform dividing block 21 connects with the curved channel section 64, the preforms in the curved channel section 64 will enter the preform slot 211 under the pressure of gravity of the preforms in the inclined slide section 63, and then the preforms will be carried away by the dividing block 21. As the dividing block 21 moves to the last side, there is a preform in all the preform slots 211. At this time, the blocking shaft 55 extends and inserts into the gap between the preforms, thereby blocking the inclined slide section 63. The preform is placed in section 3, while the preform still remains in the curved channel section 64. However, since the curved channel section 64 is horizontal, it will remain stationary unless squeezed by the preform in the inclined slide section 63. Then, the preform clamping and flipping mechanism 4 is activated, causing the preform clamp 41 to clamp the preform. The auxiliary plate 34 then moves away from the preform dividing block 21 to create clearance, facilitating the preform clamping and flipping mechanism 4 to flip the preform. After flipping, the preform with its bottle neck facing down can be placed on the conveying die of the blow molding machine. Then, the preform dividing block 21 is horizontally reset, and the above actions are repeated to complete the preform feeding. This feeding device ensures that the spacing between preforms is always accurate, and the sliding position of the preform dividing block 21 can be better monitored, making the overall structure more reliable.

[0041] 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 feeding device for a blow molding machine, comprising a base, wherein an inclined preform slide is fixedly installed on the base, and the outlet of the preform slide is connected to a preform separating mechanism, characterized in that: The preform separating mechanism includes a preform separating block horizontally slidably mounted on the base. The preform separating block is provided with multiple preform slots. The preform slots of the preform separating block face one side and are connected to the outlet of the preform slide. The preform separating block is driven by a horizontal reciprocating drive device. An auxiliary limiting device is installed on one side of the preform separating block on the base. The limiting device has a horizontally slidable auxiliary support plate. The auxiliary support plate is driven by an auxiliary linear power device to move closer to or away from the preform separating block. When the auxiliary support plate is close to the preform separating block, it relies on the preform in the preform slot. A preform clamping and flipping mechanism for clamping and flipping the preform in the preform slot is installed on the other side of the preform separating block on the base. A feeding blocking device for blocking the preform from approaching the outlet of the preform slide is also installed on the base.

2. The feeding device for a blow molding machine as described in claim 1, characterized in that: The feeding blocking device includes a blocking base fixedly installed on the base, a blocking support installed on the blocking base, a blocking shaft axially slidably installed on the blocking support, the blocking shaft being driven to extend and retract by a telescopic power device, the blocking shaft being inclined, and the free end of the blocking shaft being set as a pointed tip and facing the outlet of the inclined preform slide to block the preform from the outlet.

3. The feeding device for a blow molding machine as described in claim 2, characterized in that: The blocking support is U-shaped, the telescopic power device is a cylinder and is fixedly installed on one groove wall plate of the blocking support, a bushing is installed on the other groove wall plate of the blocking support, the blocking shaft is axially slidably installed in the bushing, the blocking shaft is fixedly connected to the piston rod of the cylinder, and the blocking support is connected to the blocking base through an angle adjustment structure.

4. The feeding device for a blow molding machine as described in claim 3, characterized in that: The angle adjustment structure includes an adjustment seat, which is installed on the blocking base. The side of the blocking support near the preform slide is hinged to the adjustment seat. The adjustment seat has a strip hole. An adjustment rod is hinged to the side of the blocking support away from the preform slide. The adjustment rod is inserted into the strip hole and locked in place by a nut.

5. The feeding device for a blow molding machine as described in claim 4, characterized in that: A vertical rod is fixedly installed on the adjusting seat, and a locking block is provided on the blocking base. The locking block and the blocking base are provided with clamping arc surfaces that cooperate to clamp the vertical rod. The locking block is fixed to the blocking base by locking bolts.

6. The feeding device for a blow molding machine as described in claim 5, characterized in that: The blocking base is fixed to the base by adjusting bolts. The blocking base is provided with parallel waist holes, the extension direction of which is towards the preform slide. The adjusting bolts are constrained within the waist holes.

7. A feeding device for a blow molding machine as described in any one of claims 1 to 6, characterized in that: The auxiliary backrest is horizontally slidably mounted on a backrest bracket. The backrest bracket includes an L-shaped first backrest support rod, a second backrest support rod, and a horizontal mounting beam. The horizontal rod portions of the first and second backrest support rods are provided with horizontal adjustment slots. The horizontal rod portions are fixed to the base by bolts constrained within the horizontal adjustment slots. The vertical rod portions of the first and second backrest support rods are provided with vertical adjustment slots. The horizontal mounting beam is fixed to the first and second backrest support rods by bolts constrained within the vertical adjustment slots. The auxiliary backrest is horizontally slidably mounted on the horizontal mounting beam via a guide rod. The auxiliary linear power device is fixed on the horizontal mounting beam.

8. The feeding device for a blow molding machine as described in claim 7, characterized in that: The base is provided with a slide plate, which includes an inclined plate portion and a horizontal plate portion. The preform slide is provided on the slide plate, which includes an inclined slide section on the inclined plate portion and a curved channel section on the horizontal plate portion. The preform dividing block is provided with an auxiliary support plate surface. The preform dividing block is located below the slide plate, and the auxiliary support plate surface partially covers the curved channel section. The feeding blocking device blocks the preform at the lower end of the inclined slide section.

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