An adjustable automatic preform removal and de-preform blowing machine

Abstract

This utility model provides an adjustable automatic preform removal and de-preg blowing machine, including a conveying mechanism for conveying preforms, a preform removal mechanism, and a de-preg removal mechanism. The conveying mechanism includes an annular conveying assembly and multiple mounting heads mounted on the annular conveying assembly for mounting preforms. The preform removal mechanism is located above the annular conveying assembly and includes a left clamp and a right clamp that grip the upper part of the mounting heads, as well as a drive assembly that drives the left clamp, the right clamp, and the mounting heads to rise simultaneously. The de-preg removal mechanism is located on the side of the annular conveying assembly and below the preform removal mechanism, and includes a pressure plate for pressing down the preforms. Through the coordinated operation of the conveying mechanism, the preform removal mechanism, and the de-preg removal mechanism, precise linkage of the preform removal and de-preg actions is achieved, improving production efficiency.

Description

[Technical Field]

[0001] This utility model relates to the field of blow molding machine technology, specifically to an adjustable automatic preform removal blow molding machine. [Background Technology]

[0002] A blow molding machine is an industrial device that processes plastic granules or preforms into hollow containers using a blow molding process. It is widely used in the beverage, cosmetics, and pharmaceutical industries. The basic process of a blow molding machine includes heating and softening plastic granules or preforms → placing them in a mold → injecting compressed air to inflate and shape the container → cooling and demolding. Traditional blow molding machines commonly suffer from the following problems with their preform removal mechanisms:

[0003] 1. Poor preform removal stability: When using pneumatic or friction-based preform removal, the preform is prone to slippage, leading to preform removal failure (such as preform jamming or tilting) and low yield.

[0004] 2. Limited applicability: The preform removal component is fixed and cannot be adjusted, making it unable to adapt to different preform sizes (such as differences in support ring height), requiring frequent component replacements and resulting in low efficiency.

[0005] 3. Insufficient structural reliability: Uneven clamping force of the preform extraction mechanism can easily cause wear on the mounting head or damage to the preform.

[0006] In view of this, this case involves in-depth research into the aforementioned issues, which led to the formation of this case. [Utility Model Content]

[0007] This invention aims to solve the aforementioned technical problems of existing blow molding machines by providing an adjustable automatic preform removal and de-preg blowing machine. It changes the preform removal method to a mechanical one, using a pressure plate in the preform removal mechanism to forcibly clamp the preform support ring, eliminating the risk of preform slippage and achieving highly stable preform removal. The adjustable pressure plate and adaptive preform removal grippers are compatible with multiple preform sizes, improving the machine's applicability. Furthermore, the coordinated operation of the conveying mechanism, preform removal mechanism, and preform de-preg mechanism ensures precise linkage between the preform removal and de-preg actions, thereby improving production efficiency.

[0008] This utility model is implemented as follows: An adjustable automatic preform removal and de-preform blowing machine includes a conveying mechanism for conveying preforms, a preform removal mechanism, and a de-preform removal mechanism; the conveying mechanism includes an annular conveying assembly and multiple mounting heads mounted on the annular conveying assembly for mounting preforms; the preform removal mechanism is located above the annular conveying assembly and includes a left clamp and a right clamp that clamp the upper part of the mounting heads, and a driving assembly that drives the left clamp, the right clamp, and the mounting heads to rise simultaneously; the de-preform removal mechanism is located on the side of the annular conveying assembly and below the preform removal mechanism, and includes a pressure plate for pressing down the preforms.

[0009] Furthermore, the mounting head includes a blank holder, a rotating shaft, a rotating gear, a washer, a spacer ring, a first bearing component, a first pad, a spring, a second pad, a second bearing component, a blank insert, and a blank holder; the blank holder has a through-hole forming a mounting cavity, and the rotating shaft is mounted in the mounting cavity; the rotating shaft includes a narrow diameter section and a wide diameter section, and the narrow diameter section and the wide diameter section form a limiting step; the rotating gear and the washer are mounted on the limiting step from top to bottom; the spacer ring, the first bearing component, the first pad, the spring, the second pad, and the second bearing component are sequentially mounted outside the wide diameter section from top to bottom; the blank insert is mounted at the bottom end of the rotating shaft.

[0010] Furthermore, the mounting head includes a first C-shaped retaining ring and a second C-shaped retaining ring; the blank head seat is also recessed with a first groove for mounting the first C-shaped retaining ring and a second groove for mounting the second C-shaped retaining ring, the inner diameter of the first groove and the second groove being larger than the inner diameter of the mounting cavity; the top surface of the first bearing component abuts against the bottom surface of the first C-shaped retaining ring, and the bottom surface of the second bearing component abuts against the top surface of the second C-shaped retaining ring.

[0011] Furthermore, the upper part of the mounting head is also threaded with an anti-loosening nut for tightening the self-rotating gear.

[0012] Furthermore, the blank-pulling mechanism also includes a Z-shaped mounting platform; the driving assembly includes a cylinder, a floating joint, and a blank-pulling plate; the cylinder is fixedly mounted on the top of the Z-shaped mounting platform, and the cylinder output end is connected to the blank-pulling plate through the floating joint.

[0013] Furthermore, the left clamp includes a first left clamping jaw and a second left clamping jaw. The first left clamping jaw is mounted on the first end of the drawing plate via a first left rotating shaft, and the second left clamping jaw is mounted on the second end of the drawing plate via a second left rotating shaft. The right clamp includes a first right clamping jaw and a second right clamping jaw. The first right clamping jaw is mounted on the first end of the drawing plate via a first right rotating shaft, and the second right clamping jaw is mounted on the second end of the drawing plate via a second right rotating shaft. The first left clamping jaw and the first right clamping jaw are connected by a first tension spring, and the second left clamping jaw and the second right clamping jaw are connected by a second tension spring. The clamp also includes a first pull plate and a second pull plate. The first pull plate is fixedly mounted on the lower part of the first left clamping jaw and the second left clamping jaw, and the second pull plate is fixedly mounted on the lower part of the first right clamping jaw and the second right clamping jaw. The first pull plate has a first step for a washer to abut against, and the second pull plate has a second step for a washer to abut against.

[0014] Furthermore, a slider is fixedly connected to one side of the blank-drawing plate, and a slide rail that cooperates with the slider is provided on the Z-shaped mounting platform.

[0015] Furthermore, the de-embryoling mechanism also includes a fixing frame, and the pressure plate is vertically installed at the bottom of the fixing frame.

[0016] Furthermore, the bottom end of the fixing frame is provided with an adjustment hole, and the demolding plate is provided with an elongated hole. The fixing frame and the plate are detachably connected by a bolt assembly.

[0017] Furthermore, a support ring is provided on the outer periphery of the preform.

[0018] This utility model relates to an adjustable automatic preform removal and de-preg blowing machine. It adopts a mechanical de-preg method, where the pressure plate of the de-preg mechanism forcibly clamps the preform support ring, eliminating the risk of preform slippage and achieving highly stable de-preg removal. The adjustable pressure plate and adaptive preform removal grippers are compatible with multiple preform sizes, improving the machine's applicability. Furthermore, the coordinated operation of the conveying mechanism, preform removal mechanism, and de-preg mechanism achieves precise linkage of the preform removal and de-preg actions, improving production efficiency. [Attached Image Description]

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the adjustable automatic preform removal and de-embryo blowing machine of this utility model.

[0021] Figure 2 This is a schematic diagram of the connection structure of the conveying mechanism, the embryo-pulling mechanism, and the embryo-removing mechanism in this utility model.

[0022] Figure 3 This is a cross-sectional view of the connection between the mounting head and the annular conveyor assembly in this utility model.

[0023] Figure 4 This is a schematic diagram of the mounting head in this utility model.

[0024] Figure 5 This is a cross-sectional view of the mounting head in this utility model.

[0025] Figure 6 This is a schematic diagram of the embryo-pulling mechanism in this utility model.

[0026] Figure 7 This is a schematic diagram of the embryo removal mechanism in this utility model.

[0027] Reference numerals: Conveying mechanism 100, Annular conveying assembly 1, Mounting head 2, Blank head seat 21, Rotating shaft 22, Narrow diameter section 221, Wide diameter section 222, Limiting step 223, Rotating gear 23, Washer 24, Spacer ring 25, First bearing component 26, First pad 27, Spring 28, Second pad 29, Second bearing component 210, Blank insertion head 211, Blank head pad 212, Mounting cavity 213, First C-shaped retaining ring 214, Second C-shaped retaining ring 215, Anti-loosening nut 216, Connecting part 217, Third C-shaped retaining ring 218, Blank pulling machine Components 200, left clamp 3, first left clamp 31, second left clamp 32, first left rotating shaft 33, first tension spring 34, first pull plate 36, first step 361, right clamp 4, first right clamp 41, second right clamp 42, first right rotating shaft 43, second pull plate 44, second step 441, drive assembly 5, cylinder 51, floating joint 52, preform extraction plate 53, slider 531, Z-shaped mounting platform 6, slide rail 61, preform removal mechanism 300, pressure plate 7, elongated hole 71, fixing frame 8, adjusting hole 81, preform 400, support ring 401.

Detailed Implementation Methods

[0028] To better understand the technical solution of this utility model, the technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Please see Figure 1-7 As shown, this utility model provides an adjustable automatic preform removal and de-preg blowing machine, including a conveying mechanism 100 for conveying preforms 400, a preform removal mechanism 200, and a de-preg removal mechanism 300. The conveying mechanism 100 includes an annular conveying assembly 1 and multiple mounting heads 2 mounted on the annular conveying assembly 1 for mounting the preforms 400; the annular conveying assembly 1 drives the mounting heads 2 to move, and the preforms 400 are fixed on the preform insertion heads 211 of the mounting heads 2. The preform removal mechanism 200 is located above the annular conveying assembly 1. The preform removal mechanism 200 includes a left clamp 3 and a right clamp 4 that clamp the upper part of the mounting heads 2, and a driving assembly 5 that drives the left clamp 3, the right clamp 4, and the mounting heads 2 to rise simultaneously; the washers 24 of the multiple mounting heads 2 enter between the left clamp 3 and the right clamp 4 and are clamped by the left clamp 3 and the right clamp 4, and the driving assembly 5 drives the left clamp 3, the right clamp 4, and the mounting heads 2 to rise simultaneously. The preform removal mechanism 300 is located on the side of the annular conveying assembly 1 and below the preform removal mechanism 200. The preform removal mechanism 300 includes a pressure plate 7 for pressing down the preform 400. The pressure plate 7 is higher than the height of the preform 400 support ring 401. When the preform 400 rises, the support ring 401 is blocked by the pressure plate 7, while the preform insertion head 211 continues to move upward, realizing mechanical forced preform removal.

[0030] This utility model relates to an adjustable automatic preform removal and de-preg blowing machine. It adopts a mechanical de-preg method, where the pressure plate 7 of the de-preg mechanism 300 forcibly positions the preform 400 support ring 401, eliminating the risk of preform slippage and achieving highly stable de-preg removal. The adjustable pressure plate 7 and adaptive preform removal grippers are compatible with multiple preform sizes 400, improving the machine's applicability. The coordinated operation of the conveying mechanism 100, the preform removal mechanism 200, and the de-preg mechanism 300 achieves precise linkage of the preform removal and de-preg actions, improving production efficiency.

[0031] In this utility model, the mounting head 2 includes a blank head seat 21, a rotating shaft 22, a rotating gear 23, a washer 24, a spacer ring 25, a first bearing component 26, a first pad 27, a spring 28, a second pad 29, a second bearing component 210, a blank insertion head 211, and a blank head pad 212. The blank head seat 21 forms a mounting cavity 213, and the rotating shaft 22 is installed in the mounting cavity 213. The rotating shaft 22 includes a narrow diameter section 221 and a wide diameter section 222, which form a limiting step 223. The rotating gear 23 and the washer 24 are installed on the limiting step 223 from top to bottom. The spacer ring 25, the first bearing component 26, the first pad 27, the spring 28, the second pad 29, and the second bearing component 210 are installed sequentially from top to bottom outside the wide diameter section 222. The blank insertion head 211 is installed at the bottom end of the rotating shaft 22. The preform inserter 211 is fixed to the bottom end of the rotating shaft 22 by bolts. The preform inserter 211 is used to install the preform 400. The outer wall of the preform inserter 211 abuts against the inner wall of the preform 400's teeth, so that the preform 400 and the preform inserter 211 fit tightly together. The preform inserter pad 212 is installed on the preform inserter 211, and the preform inserter pad 212 serves to limit the position of the preform 400.

[0032] Preferably, the first bearing component 26 and the second bearing component 210 are ball bearings.

[0033] In this utility model, the mounting head 2 further includes a first C-shaped retaining ring 214 and a second C-shaped retaining ring 215; the inner wall of the blank head seat 21 is also recessed with a first groove for mounting the first C-shaped retaining ring 214 and a second groove for mounting the second C-shaped retaining ring 215, the inner diameter of the first groove and the second groove being larger than the inner diameter of the mounting cavity 213; the top surface of the first bearing member 26 abuts against the bottom surface of the first C-shaped retaining ring 214, the bottom surface of the second bearing member 210 abuts against the top surface of the second C-shaped retaining ring 215, and the C-shaped retaining rings limit the movement to ensure the stable lifting and lowering of the rotating shaft 22.

[0034] In this utility model, the inner wall of the blank holder 21 is further provided with a third groove for installing the first bearing member 26 and a fourth groove for installing the second bearing member 210. The inner diameter of the third groove and the fourth groove is larger than the inner diameter of the mounting cavity 213 and smaller than the inner diameter of the first groove and the second groove.

[0035] In this utility model, a third C-shaped buckle 218 is also included. A fifth groove for mounting the third C-shaped buckle 218 is formed on the outer wall of the rotating shaft 22. The second pad 29 is mounted on the third C-shaped buckle 218.

[0036] In this utility model, the upper part of the mounting head 2 is also threaded with an anti-loosening nut 216 for pressing the self-rotating gear 23. The anti-loosening nut 216 is threadedly locked with the rotating shaft 22, thereby enhancing the reliability of the self-rotating gear 23.

[0037] In this invention, the embryo head seat 21 is snapped into the annular conveying assembly 1 via the connecting part 217.

[0038] When the preform pulling mechanism 200 pulls the washer 24, the anti-loosening nut 216, the self-rotating gear 23, the washer 24, the rotating shaft 22, the second pad 29, the third C-shaped retaining ring 218, the preform insertion head 211, the preform head pad 212, and the preform 400 rise together. The second pad 29 compresses the spring 28, and the support ring 401 of the preform 400 is forcibly locked by the pressure plate 7, causing the preform 400 to separate from the preform insertion head 211 and fall off.

[0039] In this invention, the preform extraction mechanism 200 further includes a Z-shaped mounting platform 6; the drive assembly 5 includes a cylinder 51, a floating joint 52, and a preform extraction plate 53; the cylinder 51 is fixedly mounted on the top of the Z-shaped mounting platform 6, and the output end of the cylinder 51 is connected to the preform extraction plate 53 through the floating joint 52. When the mounting head 2 reaches the work position, the left clamp 3 and the right clamp 4 automatically clamp the washer 24 on the upper part of the mounting head 2 through a tension spring; then the cylinder 51 retracts, driving the preform extraction plate 53 to rise, and the clamps synchronously lift the rotating shaft 22 of the mounting head 2 through the pull plate, causing the preform 400 to move upward.

[0040] In this utility model, the left clamp 3 includes a first left clamp 31 and a second left clamp 32. The first left clamp 31 is mounted on the first end of the blank-drawing plate 53 via a first left rotating shaft 33, and the second left clamp 32 is mounted on the second end of the blank-drawing plate 53 via a second left rotating shaft. The right clamp 4 includes a first right clamp 41 and a second right clamp 42. The first right clamp 41 is mounted on the first end of the blank-drawing plate 53 via a first right rotating shaft 43, and the second right clamp 42 is mounted on the second end of the blank-drawing plate 53 via a second right rotating shaft. By adjusting the tightness of the first left rotating shaft 33, the second left rotating shaft, the first right rotating shaft 43, and the second right rotating shaft, the distance between the left clamp 3 and the right clamp 4 can be adjusted to accommodate washers 24 of different sizes. The first left gripper 31 and the first right gripper 41 are connected by a first tension spring 34, and the second left gripper 32 and the second right gripper 42 are connected by a second tension spring; the distance between the left clamp 3 and the right clamp 4 is adaptive to the size of the washer 24 by the tension spring. It also includes a first pull plate 36 and a second pull plate 44. The first pull plate 36 is fixedly installed on the lower part of the first left gripper 31 and the second left gripper 32, and the second pull plate 44 is fixedly installed on the lower part of the first right gripper 41 and the second right gripper 42; the first pull plate 36 has a first step 361 for the washer 24 to abut against, and the second pull plate 44 has a second step 441 for the washer 24 to abut against.

[0041] In this invention, a slider 531 is fixedly connected to one side of the blank-drawing plate 53, and a slide rail 61 that cooperates with the slider 531 is provided on the Z-shaped mounting platform 6. The combination of the slider 531 and the slide rail 61 ensures that the blank-drawing plate 53 moves vertically.

[0042] In this invention, the preform removal mechanism 300 further includes a fixing frame 8, and the pressure plate 7 is vertically installed at the bottom of the fixing frame 8 to accurately position the preform 400 support ring 401. The bottom of the fixing frame 8 is provided with an adjustment hole, and the pressure plate 7 is provided with an elongated hole 71. The fixing frame 8 and the pressure plate 7 are detachably connected by a bolt assembly.

[0043] In this utility model, the pressure plate 7 extends toward the side of the mounting head 2 and is provided with an extension pressure block 72, which presses down on the support ring 401.

[0044] During adjustment, align the elongated hole 71 of the pressure plate 7 with the adjustment hole of the fixing frame 8 according to the size of the preform 400 thread or the size of the support ring 401. Manually change the alignment position of the adjustment hole and the elongated hole 71 to move the pressure plate 7 closer to or further away from the mounting head 2. Then, use the bolt assembly to lock the pressure plate 7 and the fixing frame 8. The pressure plate 7 of the preform removal mechanism 300 is horizontally adjusted through the elongated hole 71 and the bolt assembly to adapt to different preform 400 thread sizes or different sizes of support rings 401.

[0045] In this invention, a support ring 401 is provided on the outer periphery of the preform 400. The support ring 401 is designed to be precisely blocked by the pressure plate 7 to ensure a high success rate of preform removal.

[0046] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. An adjustable automatic preform blowing machine, characterized in that: The device includes a conveying mechanism for transporting preforms, a preform removal mechanism, and a preform unloading mechanism. The conveying mechanism includes an annular conveying assembly and multiple mounting heads mounted on the annular conveying assembly for mounting preforms. The preform removal mechanism is located above the annular conveying assembly and includes a left clamp and a right clamp that clamp the upper part of the mounting heads, as well as a drive assembly that drives the left clamp, the right clamp, and the mounting heads to rise simultaneously. The preform unloading mechanism is located on the side of the annular conveying assembly and below the preform removal mechanism, and includes a pressure plate for pressing down the preforms.

2. The adjustable automatic preform blowing machine as described in claim 1, characterized in that: The mounting head includes a blank holder, a rotating shaft, a rotating gear, a washer, a spacer ring, a first bearing component, a first pad, a spring, a second pad, a second bearing component, a blank insert, and a blank holder pad. The blank holder has a through-hole forming a mounting cavity, and the rotating shaft is mounted in the mounting cavity. The rotating shaft includes a narrow diameter section and a wide diameter section, which form a limiting step. The rotating gear and the washer are mounted on the limiting step from top to bottom. The spacer ring, the first bearing component, the first pad, the spring, the second pad, and the second bearing component are sequentially mounted outside the wide diameter section from top to bottom. The blank insert is mounted at the bottom end of the rotating shaft.

3. The adjustable automatic preform blowing machine as described in claim 2, characterized in that: The mounting head includes a first C-shaped retaining ring and a second C-shaped retaining ring; the blank head seat is also recessed with a first groove for mounting the first C-shaped retaining ring and a second groove for mounting the second C-shaped retaining ring, the inner diameter of the first groove and the second groove being larger than the inner diameter of the mounting cavity; the top surface of the first bearing component abuts against the bottom surface of the first C-shaped retaining ring, and the bottom surface of the second bearing component abuts against the top surface of the second C-shaped retaining ring.

4. The adjustable automatic preform blowing machine as described in claim 3, characterized in that: The upper part of the mounting head is also threaded with an anti-loosening nut for tightening the self-rotating gear.

5. The adjustable automatic preform blowing machine as described in any one of claims 1-4, characterized in that: The blank-pulling mechanism also includes a Z-shaped mounting platform; the drive assembly includes a cylinder, a floating joint, and a blank-pulling plate; the cylinder is fixedly mounted on the top of the Z-shaped mounting platform, and the cylinder output end is connected to the blank-pulling plate through the floating joint.

6. The adjustable automatic preform blowing machine as described in claim 5, characterized in that: The left clamp includes a first left clamp and a second left clamp. The first left clamp is mounted on the first end of the drawing plate via a first left rotating shaft, and the second left clamp is mounted on the second end of the drawing plate via a second left rotating shaft. The right clamp includes a first right clamp and a second right clamp. The first right clamp is mounted on the first end of the drawing plate via a first right rotating shaft, and the second right clamp is mounted on the second end of the drawing plate via a second right rotating shaft. The first left clamp and the first right clamp are connected by a first tension spring, and the second left clamp and the second right clamp are connected by a second tension spring. The clamp also includes a first pull plate and a second pull plate. The first pull plate is fixedly mounted on the lower part of the first left clamp and the second left clamp, and the second pull plate is fixedly mounted on the lower part of the first right clamp and the second right clamp. The first pull plate has a first step for a washer to abut against, and the second pull plate has a second step for a washer to abut against.

7. The adjustable automatic preform blowing machine as described in claim 6, characterized in that: A slider is fixedly connected to one side of the blank-drawing plate, and a slide rail that cooperates with the slider is provided on the Z-shaped mounting platform.

8. The adjustable automatic preform blowing machine as described in any one of claims 6-7, characterized in that: The de-embryoling mechanism also includes a fixing frame, and the pressure plate is vertically installed at the bottom of the fixing frame.

9. The adjustable automatic preform blowing machine as described in claim 8, characterized in that: The bottom end of the fixing frame is provided with an adjustment hole, and the demolding plate is provided with an elongated hole. The fixing frame and the plate are detachably connected by a bolt assembly.

10. The adjustable automatic preform blowing machine as described in claim 1, characterized in that: The preform is provided with a support ring on its outer periphery.

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