A molding die system for a blow molding machine

Abstract

This invention provides a molding die system for a blow molding machine, including a first molding die device and a second molding die device arranged opposite to each other, and at least one correction device for correcting deviations in the preform; the correction device is installed on the top of the first molding die device with its correction end facing the second molding die device. By incorporating the correction device, the molding die system can correct positioning deviations in the preform, ensuring accurate positioning before blow molding, thus guaranteeing the precision of the bottle shape and ensuring the quality of the finished product.

Description

[Technical Field]

[0001] This utility model relates to the field of blow molding machine technology, and specifically to a molding die system for a blow molding machine. [Background Technology]

[0002] A blow molding machine is an industrial equipment that processes plastic granules or preforms into hollow containers through a blow molding process. It is widely used in the packaging of beverages, pharmaceuticals, cosmetics and food. Its core principle is to use air pressure to make heated and softened plastic material adhere to the inner wall of a mold to form a finished product after cooling.

[0003] In the field of automated blow molding production, bottle types with toothed positioning function (as shown in the attached image) are used. Figure 2 The production of threaded bottle necks has long faced the following problems: after the preform is initially positioned by the preform conveying device, it needs to be transferred to the forming mold by the gripper. However, the preform may shift again during the transfer and handling process, resulting in accuracy deviation. It can only be intervened by manual sampling inspection later, which disrupts the continuity of the fully automated production line, reduces production efficiency, and results in a high scrap rate.

[0004] 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]

[0005] This invention aims to solve the technical problem of potential misalignment during the transfer and handling of preforms, which can lead to precision deviations. The invention provides a molding die system for a blow molding machine. By setting a correction device, the preform with positioning deviations can be corrected, ensuring accurate positioning before blow molding, thus guaranteeing the positioning accuracy of the bottle shape and ensuring the quality of the finished product.

[0006] This utility model is implemented as follows: a molding die system for a blow molding machine includes a first molding die device and a second molding die device arranged opposite to each other, and at least one correction device for correcting deviations of the preform; the correction device is installed on the top of the first molding die device and the correction end is arranged facing the second molding die device.

[0007] Furthermore, the correction device includes a first gripper, a second gripper, and a gripper cylinder for driving the opening and closing of the first and second grippers.

[0008] Furthermore, the first molding die device includes a first template base, a first guide rail assembly, and a first die. The first template base is mounted on the first guide rail assembly, and the first die is mounted on the first template base. The first die has at least one first half-die cavity. The second molding die device includes a second template base, a second guide rail assembly, and a second die. The second template base is mounted on the second guide rail assembly, and the second die is mounted on the second template base. The second die has at least one second half-die cavity. After the first die and the second die are closed, the first half-die cavity and the second half-die cavity surround each other to form a molding cavity. The straightening device is arranged in a one-to-one correspondence with the molding cavity. The straightening device is installed on the top of the first die.

[0009] Furthermore, the first guide rail assembly includes a first linear guide and a slider fixed to the bottom of the first template seat; the second guide rail assembly includes a second linear guide and a second slider fixed to the bottom of the second template seat.

[0010] Furthermore, the correction device also includes a cylinder positioning plate; the cylinder positioning plate is installed on the top of the first mold, and the gripper cylinder is installed on the cylinder positioning plate.

[0011] The advantages of this invention are as follows: The molding die system uses a correction device set above the first die to perform secondary position calibration of the preform before blow molding, eliminating the cumulative error during the preform transfer process. It can correct preforms with positioning deviations, ensuring accurate positioning before blow molding, thus guaranteeing accurate bottle positioning and ensuring product quality. The correction device is set towards the second die to ensure that the preform is in the center of the double die cavity at the moment of die closing, avoiding uneven wall thickness during blow molding. [Attached Image Description]

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the blow molding machine in this utility model.

[0014] Figure 2 This is a schematic diagram of the preform structure in this utility model.

[0015] Figure 3 This is a schematic diagram of the molding die system in this utility model.

[0016] Figure 4 This is a schematic diagram of the structure of the first molding die device in this utility model.

[0017] Figure 5 This is a schematic diagram of the corrective action of the corrective device in this utility model.

[0018] Figure 6 This is a schematic diagram of the rotation device in this utility model.

[0019] Figure 7 This is a cross-sectional view of the rotation device in this utility model.

[0020] Figure 8 This is a schematic diagram of the tooth positioning component in this utility model.

[0021] Figure 9 This is a cross-sectional view of the tooth positioning component in this utility model.

[0022] Figure 10 This is a schematic diagram of the embryo removal device in this utility model.

[0023] Figure label:

[0024] Conveying system 100, circular conveyor 1, active rotary disk 11, driven rotary disk 12, circular conveyor chain 13, rotation device 2, gear 21, rotating shaft 22, blank insert head 23, blank insert body 231, blank pressing ring 232, blank head pad 233, toothed positioning assembly 24, positioning seat 241, through hole 2411, first mounting groove 2412, second mounting groove 2413, perforation 2414, ball bearing 242, rotating positioning component 243, torsion spring 2431, positioning piece 2432, fourth C-type retaining ring 244, guide bracket 245, rotating housing 25, mounting cavity 251, washer 26, annular magnet 2 7. Spacer ring 28. First bearing component 29. First pad 210. Spring 211. Second pad 212. Second bearing component 213. Pin 214. First C-type buckle 215. Second C-type buckle 216. Third C-type buckle 217. Connecting part 218. Self-rotation drive device 3. Arc-shaped toothed ring 31. Blank removal device 4. Left clamp 41. First left clamp 411. Second left clamp 412. First tension spring 413. Right clamp 42. Drive assembly 43. Cylinder 431. Floating joint 432. Blank removal plate 433. Slider 434. Z-shaped mounting platform 44. Slide rail 441. First pull plate 45. Second pull plate 46.

[0025] The system includes a molding die system 200, a first molding die device 5, a first template base 51, a first guide rail assembly 52, a first die 53, a second molding die device 6, a straightening device 7, a first gripper 71, a second gripper 72, a gripper cylinder 73, a cylinder positioning plate 74, a transfer device 8, a preform 400, and a vertical slot 401.

Detailed Implementation Methods

[0026] 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.

[0027] Please see Figures 1 to 10As shown, a blow molding machine includes a conveying system 100 and a molding die system 200. The conveying system 100 has conveying and aligning functions, and transfers the aligned preforms 400 into the molding cavity of the molding die system 200.

[0028] In this utility model, reference is made to the appendix. Figure 3-5 As shown, the molding die system 200 includes a first molding die device 5 and a second molding die device 6 arranged opposite to each other, and a correction device 7 for correcting deviations in the preform 400. The correction device 7 is installed on the top of the first molding die device 5 with its correction end facing the second molding die device 6. Because the preform 400 is gripped and placed in the mold cavity by the transverse gripper of the transfer device 8, the originally precisely positioned preform 400 may shift during the movement and placement of the preform 400, causing accuracy deviations. The correction device 7 above the mold can correct the positioning deviation of the preform 400, ensuring accurate positioning before blow molding, thus guaranteeing accurate bottle positioning and ensuring product quality. The correction device 7 added to the top of the molding die performs a secondary position calibration of the preform 400 before blow molding, eliminating accumulated errors during the transfer process. The correction device 7 faces the second mold, ensuring that the preform 400 is centered in both mold cavities at the moment of mold closing, avoiding uneven wall thickness during blow molding. This invention also includes a moving drive device for opening and closing the first molding die device 5 and the second molding die device 6.

[0029] Reference Appendix Figure 4-5 As shown, the correction device 7 includes a first gripper 71, a second gripper 72, and a gripper cylinder 73 for driving the opening and closing of the first gripper 71 and the second gripper 72. The gripper cylinder 73 is mounted on the top of the first molding die device 5. The gripper cylinder 73 drives the opening and closing of the first gripper 71 and the second gripper 72 to achieve active mechanical correction of the preform deviation of 400°, which is more reliable than manual intervention or passive positioning. The top mounting position of the gripper cylinder 73 avoids interference with the mold opening and closing action, ensuring that the production cycle is not affected by the correction, thus balancing accuracy and efficiency.

[0030] Reference Appendix Figure 4As shown, the first molding die device 5 includes a first template base 51, a first guide rail assembly 52, and a first die 53. The first template base 51 is mounted on the first guide rail assembly 52, and the first die 53 is mounted on the first template base 51. The first die 53 has at least one first half-die cavity. A straightening device 7 is mounted on the top of the first die 53. The second molding die device 6 includes a second template base, a second guide rail assembly, and a second die. The second template base is mounted on the second guide rail assembly, and the second die is mounted on the second template base. The second die has at least one second half-die cavity. After the first die 53 and the second die are closed, the first half-die cavity and the second half-die cavity form a molding cavity. The die is installed by combining the template base and the guide rail assembly to achieve high-precision guidance during the die closing process, preventing die misalignment and squeezing of the preform 400. The straightening device 7 is directly mounted on the top of the die. Each straightening device 7 is set one-to-one with the upper and lower parts of the molding cavity to form an integrated "correction-forming" station, reducing the risk of secondary offset. The first guide rail assembly 52 includes a first linear guide and a first slider fixed to the bottom of the first template base 51. The second guide rail assembly includes a second linear guide and a second slider fixed to the bottom of the second template base.

[0031] Reference Appendix Figure 4 As shown, the straightening device 7 also includes a cylinder positioning plate 74; the cylinder positioning plate 74 is installed on the top of the first mold 53, and the gripper cylinder 73 is installed on the cylinder positioning plate 74. Since the gripper cylinder 73 has threaded teeth, it cannot be directly mounted on the first mold 53, so the cylinder positioning plate 74 is added as an adapter plate for locking the gripper cylinder 73.

[0032] Reference Appendix Figure 1-2As shown in Figures 6-10, the conveying system 100 includes an annular conveying device 1, multiple rotating devices 2 mounted on the annular conveying device 1, a rotating drive device 3 that works with the annular conveying device 1 to drive the rotating devices 2 to rotate, a preform removal device 4 that separates the preform 400 from the rotating device 3, and a transfer device 8 that places the preform 400 into the molding die system 200; the preform removal device 4 is fixedly mounted on the annular conveying device 1, and the transfer device 8 is located below the preform removal device 4. Bottle preforms 400 are inserted one by one into the insertion head 23 at the bottom of the rotating device 2 using a robotic arm or manually. After being transported to the arc-shaped gear ring 31, the gear 21 of the rotating device 2 meshes with the arc-shaped gear ring 31, thereby driving the bottle preforms 400 to rotate together (the maximum rotation range of the bottle preform 400 is 360°). When the positioning piece 2432 encounters the slot 401, the bottle preform 400 stops rotating, and the rotating device 2 is transported forward to below the preform removal device 4. Then, the transfer device 8 clamps the bottle preform 400, and the preform removal device 4 lifts the rotating device 2, separating the bottle preform 400 from the insertion head 23 of the rotating device 2. The transfer device 8 is a conventional prior art, for example, the transfer device 8 includes a transverse gripper and a transverse drive device that drives the transverse gripper to move. The transverse gripper can clamp the bottle preform 400, separating the bottle preform 400 from the rotating device 2, and then the transverse drive device puts the bottle preform 400 into the molding cavity of the molding mold system 200.

[0033] Reference Appendix Figure 1 As shown, the annular conveyor 1 includes a driving rotary disk 11, a driven rotary disk 12, an annular conveyor chain 13, and a power motor that drives the driving rotary disk 11 to rotate. The end of the annular conveyor chain 13 at the driving rotary disk 11 is defined as the first end, and the end at the driven rotary disk 12 is defined as the second end. The self-rotation drive device 3 is located at the first end of the annular conveyor 1, and the de-embryo removal device 4 is located above one side of the annular conveyor chain 13 for clamping and lifting the self-rotation device 2.

[0034] Reference Appendix Figure 6-7As shown, the self-rotating device 2 includes a gear 21, a rotating shaft 22, a blank insert head 23, a toothed positioning assembly 24, a rotating housing 25, a washer 26, an annular magnet 27, a spacer ring 28, a first bearing component 29, a first pad 210, a spring 211, a second pad 212, and a second bearing component 213. The rotating housing 25 has a through-hole forming a mounting cavity 251, and the rotating shaft 22 is installed in the mounting cavity 251. The gear 21 is installed on the upper outer wall of the rotating shaft 22. The blank insert head 23 is fixedly installed at the bottom end of the rotating shaft 22. The annular magnet 27, washer 26, spacer ring 28, first bearing component 29, first pad 210, spring 211, second pad 212, and second bearing component 213 are fitted from top to bottom onto the outer wall of the rotating shaft 22. The washer 26 is fixedly connected to the rotating shaft 22 by a pin 214, and the annular magnet 27 is assembled inside the washer 26. Preferably, the first bearing component 29 and the second bearing component 213 are ball bearings. The washer 26 and the gear 21 are attracted together by the ring magnet 27. The friction between the two enables the gear 21 to rotate, driving the rotation shaft 22 to rotate. When the preform 400 rotates within 360°, it ensures that the positioning piece 2432 is engaged in the vertical groove 401 of the preform 400. At the same time, after confirming that the positioning piece 2432 is engaged in the vertical groove 401 of the preform 400, the rotational torque of the rotation shaft 22 is much greater than the friction between the gear 21 and the washer 26. In this way, the gear 21 can continue to rotate while the rotation shaft 22, after being positioned, no longer rotates. This ensures that the rotation angle of the gear 21 is greater than 360° and ensures accurate positioning of each tooth. When the preform removal device 4 pulls the washer 26 upward, the rotating shaft 22 and the preform insertion head 23 rise, the second pad 212 compresses the spring 211, and the transfer device 8 clamps the preform 400, so that the preform 400 separates from the preform insertion head 23.

[0035] Reference Appendix Figure 8-9As shown, the tooth positioning assembly 24 includes a positioning seat 241, a ball bearing 242, and a rotating positioning component 243. One end of the positioning seat 241 forms a through hole 2411 for the rotating shaft 22 to pass through. The positioning seat 241 is rotatably mounted on the outer wall of the rotating shaft 22 via the ball bearing 242. The rotating positioning component 243 is mounted on the other end of the positioning seat 241 via a torsion spring 2431. The rotating positioning component 243 includes a positioning piece 2432 for engaging the preform 400 in the vertical groove 401. By changing the rigid connection between the positioning seat 241 and the rotating shaft 22 to a rotatable connection via the ball bearing 242, the frictional resistance between the tooth positioning seat 241 and the preform pad 233 is completely eliminated, avoiding positioning deviations caused by mechanical stiffness. The positioning piece 2432 elastically engages the preform 400 in the vertical groove 401 via the torsion spring 2431, ensuring the sensitivity and repeatability of the tooth positioning action of the preform 400. The positioning piece 2432 driven by the torsion spring 2431 achieves flexible engagement, avoiding damage to the preform from hard impacts. The through hole 2411 connects to a first mounting groove 2412 for mounting the ball bearing 242, and the first mounting groove 2412 connects to a second mounting groove 2413 for mounting the fourth C-shaped retaining ring 244. The inner diameter of the first mounting groove 2412 is larger than the inner diameter of the through hole 2411 and smaller than the inner diameter of the second mounting groove 2413. The stepped design of the mounting grooves (through hole 2411 → first mounting groove 2412 → second mounting groove 2413) and the limiting structure of the fourth C-shaped retaining ring 244 ensure the axial stability of the ball bearing 242 installation and prevent radial runout of the rotating shaft 22 caused by loosening of the ball bearing 242. By setting the inner diameter of the second mounting groove 2413 to be larger than that of the first mounting groove 2412, it is convenient to install the ball bearing 242. The ball bearing 242 is placed first, and then the fourth C-shaped retaining ring 244 is installed. The lower outer wall of the rotating shaft 22 is recessed with a third mounting groove for mounting the ball bearing 242, which corresponds to the first mounting groove 2412. The third mounting groove and the first mounting groove 2412 form a mounting groove for mounting the ball bearing 242, maintaining the long-term positioning accuracy of the ball bearing 242.

[0036] Reference Appendix Figure 6-7 As shown, the orifice positioning assembly 24 also includes a guide bracket 245; the positioning seat 241 forms a through hole 2414 for the guide bracket 245 to pass through, the upper end of the guide bracket 245 is connected to the rotating housing 25, and the bottom end of the guide bracket 245 passes through the through hole 2414. The guide bracket 245 ensures that the orifice positioning assembly 24, the preform insertion head 23, and the preform 400 move up and down in the vertical direction.

[0037] Reference Appendix Figure 6-7As shown, the rotating device 2 further includes a first C-shaped retaining ring 215 and a second C-shaped retaining ring 216; the rotating housing 25 is also recessed with a first C-shaped retaining groove for installing the first C-shaped retaining ring 215 and a second C-shaped retaining groove for installing the second C-shaped retaining ring 216, the inner diameters of the first C-shaped retaining groove and the second C-shaped retaining groove are larger than the inner diameter of the mounting cavity 251; the top surface of the first bearing member 29 abuts against the bottom surface of the first C-shaped retaining ring 215, and the bottom surface of the second bearing member 213 abuts against the top surface of the second C-shaped retaining ring 216; the C-shaped retaining rings limit the movement to ensure the stable lifting and lowering of the rotating shaft 22. The inner wall of the rotating housing 25 is also recessed with a third mounting groove for installing the first bearing member 29 and a fourth mounting groove for installing the second bearing member 213, the inner diameters of the third mounting groove and the fourth mounting groove are larger than the inner diameter of the mounting cavity 251 and smaller than the inner diameters of the first C-shaped retaining groove and the second C-shaped retaining groove. The rotating device 2 further includes a third C-shaped retaining ring 217. A third C-shaped retaining groove is formed on the outer wall of the rotating shaft 22 for mounting the third C-shaped retaining ring 217. The second pad 212 is mounted abutting against the third C-shaped retaining ring 217. The cooperation between the third C-shaped retaining ring 217 and the third C-shaped retaining groove provides a rigid support point for the second pad 212. The rotating housing 25 is snapped onto the annular conveyor device 1 via a connecting part 218.

[0038] Reference Appendix Figure 6-7 As shown, the insert head 23 includes an insert body 231, a pressing ring 232, and a head pad 233. The pressing ring 232 is sleeved on the outer wall of the insert body 231, and the head pad 233 is installed on the top of the insert body 231 and the pressing ring 232. Bolt holes are formed along the central axis of the insert body 231 and the head pad 233. The insert head 23 is connected to the bottom end of the rotating shaft 22 by a bolt assembly. The modular bolt connection of the insert body 231, the pressing ring 232, and the head pad 233 enables rapid replacement of worn parts, reducing downtime caused by equipment maintenance (improving production efficiency and indirectly reducing scrap costs).

[0039] Reference Appendix Figure 1 As shown, the self-rotation drive device 3 is located at the annular end of the annular conveying device 1, and is used to drive the self-rotation device 2 to achieve a maximum rotation of 360°. The self-rotation drive device 3 includes an arc-shaped gear ring 31. When the self-rotation device 2 enters the arc-shaped gear ring 31, the gear 21 meshes with the arc-shaped gear ring 31, causing the self-rotation device 2 and the preform 400 to rotate together. The preform 400 has a vertical groove 401 formed on the tooth of the preform 400 for the positioning piece 2432 to be inserted. Each time the preform 400 tooth is inserted into the preform insertion head 23, it cannot be guaranteed that the vertical groove 401 corresponds with the positioning piece 2432 so that the positioning piece 2432 is inserted into the vertical groove 401. Therefore, the preform 400 needs to rotate a certain angle so that the positioning piece 2432 is inserted into the vertical groove 401. At this time, the rotating shaft 22 cannot rotate, and the gear 21 rotates freely, thus achieving the positioning of the preform 400 tooth.

[0040] Reference Appendix Figure 10 As shown, the de-coating device 4 includes a left clamp 41 and a right clamp 42 that clamp the washers 26, a drive assembly 43 that drives the left clamp 41, the right clamp 42, and the rotating devices 2 to rise simultaneously, and a Z-shaped mounting platform 44. The washers 26 of the multiple rotating devices 2 enter between the left clamp 41 and the right clamp 42 and are clamped by them. The drive assembly 43 drives the left clamp 41, the right clamp 42, and the rotating devices 2 to rise simultaneously. The drive assembly 43 includes a cylinder 431, a floating joint 432, and a de-coating plate 433. The cylinder 431 is fixedly mounted on the top of the Z-shaped mounting platform 44, and its output end is connected to the de-coating plate 433 via the floating joint 432. When the rotating assembly reaches the workstation, the left clamp 41 and the right clamp 42 automatically clamp the washers 26 via tension springs; subsequently, the cylinder 431 retracts, driving the de-coating plate 433 to rise, simultaneously lifting the rotating shaft 22. The left clamp 41 includes a first left clamping jaw 411 and a second left clamping jaw 412. The first left clamping jaw 411 is mounted to the first end of the drawing plate 433 via a first left rotating shaft, and the second left clamping jaw 412 is mounted to the second end of the drawing plate 433 via a second left rotating shaft. The right clamp 42 includes a first right clamping jaw and a second right clamping jaw. The first right clamping jaw is mounted to the first end of the drawing plate 433 via a first right rotating shaft, and the second right clamping jaw is mounted to the second end of the drawing plate 433 via a second right rotating shaft. By adjusting the tightness of the first left rotating shaft, the second left rotating shaft, the first right rotating shaft, and the second right rotating shaft, the distance between the left clamp 41 and the right clamp 42 can be adjusted to accommodate washers 26 of different sizes. The first left clamping jaw 411 and the first right clamping jaw are connected by a first tension spring 413, and the second left clamping jaw 412 and the second right clamping jaw are connected by a second tension spring. The distance between the left clamp 41 and the right clamp 42 is adaptive to the size of the washer 26 by the tension spring. It also includes a first pull plate 45 and a second pull plate 46. The first pull plate 45 is fixedly installed on the lower part of the first left gripper 411 and the second left gripper 412, and the second pull plate 46 is fixedly installed on the lower part of the first right gripper and the second right gripper. The first pull plate 45 forms a first step for the washer 26 to abut against, and the second pull plate 46 forms a second step for the washer 26 to abut against. A slider 434 is fixedly connected to one side of the blank-drawing plate 433, and a slide rail 441 that cooperates with the slider 434 is provided on the Z-shaped mounting platform 44. The combination of the slider 434 and the slide rail 441 ensures that the blank-drawing plate 433 moves vertically.

[0041] The blow molding machine of this utility model has at least the following beneficial technical effects:

[0042] 1. Significantly improved positioning accuracy: The ball bearing 242 connects the positioning seat 241 and the rotating shaft 22, completely eliminating frictional resistance and avoiding the dryness problem caused by direct fixing, achieving a positioning repeatability accuracy of ±0.1mm. The positioning plate 2432 driven by the torsion spring 2431 achieves flexible engagement, avoiding damage to the preform from hard collisions.

[0043] 2. Significantly reduced scrap rate: The design of the ring magnet 27 in the initial positioning stage allows the gear 21 to idle, and the overload protection of the preform 400 teeth solves the problem of excessive positioning torque damaging the preform; the secondary correction before molding, the correction device 7 corrects the transfer deviation in real time, and the preform mold alignment is greatly improved.

[0044] The working principle of the blow molding machine of this utility model is as follows:

[0045] S1: Initial positioning stage of bottle preform 400; bottle preform 400 is placed on preform insertion head 23, and the self-rotation drive device 3 drives gear 21 to rotate through arc-shaped gear ring 31; the rotating shaft 22 rotates bottle preform 400 synchronously. When the vertical groove 401 of bottle preform rotates to the position of the tooth positioning piece 2432, the positioning piece is springed into the vertical groove 401 under the action of torsion spring 2431; at this time, the rotating shaft 22 is blocked and stops rotating (gear 21 idles), and the initial positioning of the tooth is completed;

[0046] S2: Preform 400 transfer and de-preform stage; the left clamp 41 and right clamp 42 of the de-preform device 4 clamp the washer 26, and the cylinder 431 drives the preform plate 433 to rise through the floating joint 432; the rotating shaft 22 and the preform insertion head 23 move upward synchronously, the spring 211 is compressed, and the transfer device 8 clamps the preform 400 to complete the non-destructive separation.

[0047] S3: Secondary correction stage before molding; After the preform 400 is transferred to the molding mold system 200, deviation may occur due to displacement; The gripper cylinder 73 drives the first gripper 71 and the second gripper 72 to clamp the preform 400 and correct its position to ensure that the axis of the preform 400 coincides with the center of the mold.

[0048] S4: Blow molding after mold closing.

[0049] This invention's blow molding machine process overcomes the long-standing problems of poor precision and high scrap rate in the blow molding machine tooth positioning industry through a dual guarantee mechanism of "initial positioning ball bearing friction reduction" and "dynamic secondary correction by correction device". At the same time, it achieves zero human intervention in a fully automated production line, meeting the stringent quality requirements of high-end bottle types (such as pharmaceutical bottles and cosmetic bottles).

[0050] 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. A system of forming dies for a bottle blowing machine, characterized by: It includes a first molding die device and a second molding die device arranged opposite to each other, and at least one correction device for correcting deviations of the preform; The correction device is installed on the top of the first forming mold device and the correction end is set towards the second forming mold device.

2. The molding die system of the blow molding machine as described in claim 1, characterized in that: The correction device includes a first gripper, a second gripper, and a gripper cylinder for driving the opening and closing of the first and second grippers.

3. The molding die system of the blow molding machine as described in claim 2, characterized in that: The first molding die device includes a first template base, a first guide rail assembly, and a first die. The first template base is mounted on the first guide rail assembly, and the first die is mounted on the first template base. The first die has at least one first half-die cavity. The second molding die device includes a second template base, a second guide rail assembly, and a second die. The second template base is mounted on the second guide rail assembly, and the second die is mounted on the second template base. The second die has at least one second half-die cavity. After the first mold and the second mold are closed, the first half mold cavity and the second half mold cavity surround each other to form a molding cavity, and the straightening device is set up in a one-to-one correspondence with the upper and lower parts of the molding cavity; The correction device is installed on top of the first mold.

4. The molding die system of the blow molding machine as described in claim 3, characterized in that: The first guide rail assembly includes a first linear guide and a slider fixed to the bottom of the first template base; the second guide rail assembly includes a second linear guide and a second slider fixed to the bottom of the second template base.

5. The molding die system of the blow molding machine as described in claim 4, characterized in that: The correction device also includes a cylinder positioning plate; the cylinder positioning plate is installed on the top of the first mold, and the gripper cylinder is installed on the cylinder positioning plate.

Images