Quick mold changing device for PET bottle preform mold

Abstract

The utility model discloses a kind of quick die changing device of PET bottle embryo mould, adopt plate spring elastic energy storage and hydraulic oil dynamic control, realize "unlocking-locking" automatic switching, without manual intervention, integrated motor drives transverse movement, support telescopic pile height adjustment, electric telescopic column telescopic control and half gear-rack plate self-adapting opening and closing structure, form three-dimensional space accurate positioning and stable clamping, driving member (electric telescopic rod), mould piece (positioning pin / positioning groove), hydraulic locking mechanism, clamping mechanism form closed loop system, realize "mould butt joint-locking-handling-unlocking" whole process automation, the utility model aims at solving the problem of traditional mechanical locking efficiency and precision deficiency, no clamping handling function, realize "mould butt joint-locking-handling-unlocking" whole process automation, significantly improve production efficiency and product quality stability.

Description

Technical Field

[0001] This utility model relates to the technical field of quick mold changing devices, specifically to a quick mold changing device for a PET preform mold. Background Technology

[0002] PET bottles, as well as the plastic bottles we commonly use, such as beverage and mineral water bottles, come in a variety of shapes and sizes. To produce bottles of different shapes and sizes, molds of different shapes and sizes need to be made according to requirements. Each type of bottle requires a corresponding matching mold. Mold design plays an important role in bottle production and directly affects the quality, grade, and cost of the bottle.

[0003] In the field of PET preform mold replacement, existing technologies generally suffer from the following pain points: High degree of human intervention: Traditional mechanical locking relies on manual operation, mold change time can be as long as several hours, and the positioning accuracy is affected by the operator's experience, which can easily produce an error of more than ±0.5mm, resulting in mold docking misalignment and affecting product quality.

[0004] Functional limitations: Comparison document 1 can only achieve unidirectional locking, without clamping, handling and multi-dimensional adjustment capabilities, and cannot adapt to the need for rapid changeover of molds of different sizes / shapes; although comparison document 2 solves the exhaust gas problem, it does not address the core issue of mold changeover efficiency.

[0005] Lack of system integration: Existing devices are mostly partial functional modules (such as locking and filtering), lacking a closed-loop design for the entire process of "drive-positioning-locking-transportation", resulting in poor connection between various processes and limited production efficiency.

[0006] Comparative document 1 (CN220826245U) employs a mechanical locking method of "pin-type lock head + wedge-shaped lock plate." While this method can fix the mold, it requires manual operation of a hydraulic cylinder to drive the lock plate in and out, resulting in low efficiency and large accuracy fluctuations. Furthermore, it only addresses localized fixing needs and lacks clamping and handling functions, failing to form a complete mold changing process. Comparative document 2 (CN217073320U) focuses on the exhaust gas filtration system, using activated carbon filter plates to adsorb odors. This is not directly related to the mold changing mechanism and does not involve an automated solution for mold replacement.

[0007] To address the aforementioned issues, this invention proposes a rapid mold changing device for PET preform molds. This device solves the problems of insufficient efficiency and precision of traditional mechanical locking and the lack of clamping and handling functions, achieving full automation of the "mold docking-locking-handling-unlocking" process, and significantly improving production efficiency and product quality stability. Utility Model Content

[0008] The purpose of this utility model is to provide a quick mold changing device for PET preform molds to address the problems mentioned above. This device aims to solve the problems of insufficient efficiency and precision of traditional mechanical locking and the lack of clamping and handling functions, and to achieve full automation of the "mold docking-locking-handling-unlocking" process, thereby significantly improving production efficiency and product quality stability.

[0009] The technical solution of this utility model is as follows: This utility model discloses a quick mold changing device for a PET preform mold, comprising a base, clamping mechanisms installed at both ends of the base surface, a driving component mounted on the base surface, the driving component including an electric telescopic rod fixedly connected to the base surface, a connecting plate fixedly connected to the output end of the electric telescopic rod, a support plate fixedly connected to one side of the connecting plate, a sliding plate fixedly connected to the bottom of the support plate, a sliding groove slidably connected to the surface of the sliding plate, and a mold component mounted on the upper surface of the support plate; the mold component includes a positioning pin fixedly connected to the support plate surface, a positioning groove inserted into the surface of the positioning pin, a first template and a second template fixedly connected to the top of the positioning groove respectively, fixing grooves fixedly connected to both sides of the first template and the second template, and a hydraulic locking mechanism mounted on the surface of the fixing groove; the hydraulic locking mechanism includes a housing mounted on the support plate surface, a sealing cap fixed to the left end of the housing, and the inner... A piston body is slidably connected to the wall. A horizontally arranged piston rod is connected to the right side of the piston body. The piston rod is engaged with a fixed groove. A partition fixed between the inner walls of the housing is movably sleeved on the outside of the piston rod. A piston sleeve movably connected to the partition is fixedly sleeved on the piston rod. A connecting plate fixedly sleeved on the piston rod is provided on the right side of the partition. A symmetrically arranged leaf spring is connected between the connecting plate and the inner wall of the right end of the housing. A through-piece installed on both sides of the housing is provided between the piston body and the partition. The clamping mechanism includes a limiting frame. The limiting frame is fixedly connected to the surface of the base. A slot is opened on the surface of the limiting frame. A motor is fixedly connected to one end of the limiting frame. A rotating bolt is fixedly connected to the output end of the motor. A moving block is threadedly connected to the surface of the rotating bolt. The moving block is movably connected to the surface of the slot. A support telescopic post is fixedly connected to the surface of the moving block. An electric telescopic column is fixedly connected to one side of the support telescopic post. A clamping claw is fixedly connected to one end of the electric telescopic column.

[0010] By utilizing the elastic energy storage of the leaf spring and the dynamic control of the hydraulic oil, the automatic switching between "unlocking" and "locking" is achieved, solving the problem of low efficiency and manual intervention required by traditional mechanical locking. The plug-spring structure in the through-hole component ensures the sealing and response speed of the hydraulic oil circuit, improving system reliability. The drive component (electric telescopic rod), mold component (positioning pin / positioning groove), hydraulic locking mechanism, and clamping mechanism form a closed-loop system, realizing full automation of mold docking, locking, handling, and unlocking.

[0011] Furthermore, the hydraulic locking mechanism includes an oil hole on both sides of the housing. Above the oil hole is a fixed bracket fixed to the inner wall of the housing. The top of the fixed bracket is movably connected to a vertically arranged movable rod. The bottom end of the movable rod is connected to a plug that seals the oil hole. A spring sleeved on the movable rod is connected between the plug and the fixed bracket.

[0012] Furthermore, the right end of the piston rod of the hydraulic locking mechanism has a hemispherical structure, and the connecting plate is movably disposed inside the housing.

[0013] Further, the clamping claw includes a mounting frame, which is fixedly connected to one end of the electric telescopic column. A support plate is fixedly connected inside the mounting frame. A telescopic controller is mounted on the top of the mounting frame. A pressure block is fixedly connected to the output end of the telescopic controller. Fixed plates are fixedly connected to both sides of the pressure block. A short plate is movably connected to one end of the fixed plate. A movable plate is fixedly connected to one end of the short plate. A rotating rod is fixedly connected to the rear end of the movable plate. A half-gear is fixedly connected to one end of the rotating rod. A rack plate is meshed with one end of the half-gear. One end of the rack plate is movably connected to a limit plate, and one end of the rack plate is fixedly connected to a clamping claw strip. The rear end of the rotating rod is movably connected to the front end of the support plate through a bearing. A sliding groove is provided on one side of the rack plate. The position and size of the sliding groove are adapted to the position and size of the limit plate. The clamping mechanism achieves lateral movement by driving the rotating bolt with a motor, the height of the support telescopic pile is adjusted, the electric telescopic column controls the extension and retraction of the clamping claw, and the gear transmission of the half gear-rack plate realizes the adaptive opening and closing of the clamping claw, forming a fully automatic process of "positioning-clamping-transfer".

[0014] Furthermore, the electric telescopic rod of the driving component is connected to the support plate through a connecting plate, and the bottom of the support plate is slidably connected to the groove on the surface of the base through a sliding plate. The electric telescopic rod 0 is connected to the support plate through a connecting plate, and the bottom of the support plate is slidably connected to the groove on the surface of the base through a sliding plate. This clarifies the connection method between the driving component and the support plate and the movement method of the support plate, ensuring that the electric telescopic rod can accurately drive the support plate to move.

[0015] Furthermore, the positioning pin of the mold component is inserted into the positioning groove, and the first template and the second template are engaged with the piston rod of the hydraulic locking mechanism through the fixing groove. The positioning pin is inserted into the positioning groove, and the first template and the second template are engaged with the piston rod through the fixing groove, ensuring the stability and accuracy of the mold during installation and use.

[0016] Furthermore, the motor of the clamping mechanism is threadedly connected to the moving block via a rotating bolt, and the moving block is movably connected to the limiting frame via a slot, so that the clamping claw can be adjusted in position.

[0017] Furthermore, the telescopic controller of the gripper is connected to the fixed plate via a pressure block, and the fixed plate is movably connected to the movable plate via a short plate to ensure that the gripper can work normally.

[0018] Furthermore, the sealing cover of the hydraulic locking mechanism is fixed to the left end of the housing by bolts, and the piston body has a concave structure to ensure the sealing and normal operation of the hydraulic locking mechanism.

[0019] Furthermore, the half gear of the gripper is meshed with the rack plate, and the rack plate is movably connected to the mounting frame through a limiting plate to ensure that the movement of the gripper is accurate and stable.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. This utility model achieves automatic switching between "unlocking and locking" by using the elastic energy storage of the leaf spring and the dynamic control of the hydraulic oil, solving the problem of low efficiency and manual intervention required by traditional mechanical locking; the plug-spring structure in the through-hole component ensures the sealing and response speed of the hydraulic oil circuit, improving the reliability of the system.

[0021] 2. The clamping mechanism of this utility model achieves lateral movement by driving the rotating bolt with a motor, adjusts the height of the support telescopic pile, controls the extension and retraction of the clamping claws by the electric telescopic column, and achieves adaptive opening and closing of the clamping claws by combining the gear transmission of half gear and rack plate, forming a fully automatic process of "positioning-clamping-transportation".

[0022] 3. The drive component (electric telescopic rod), mold component (positioning pin / positioning groove), hydraulic locking mechanism, and clamping mechanism of this utility model form a closed-loop system, realizing full-process automation of "mold docking-locking-transporting-unlocking". Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the driving component of this utility model; Figure 3 This is a schematic diagram of the clamping mechanism of this utility model; Figure 4 This is a schematic diagram of the hydraulic locking mechanism of this utility model; Figure 5 This is a schematic diagram of the structure of the universal component of this utility model; Figure 6 This is a schematic diagram of the clamping claw of this utility model.

[0024] Reference numerals: 1-Base; 2-Clamping mechanism; 20-Limiting frame; 21-Slot; 22-Motor; 23-Rotating bolt; 24-Moving block; 25-Support telescopic post; 26-Electric telescopic column; 27-Clamping claw; 270-Mounting frame; 271-Support plate; 272-Telescopic controller; 273-Pressure block; 274-Fixing plate; 275-Short plate; 276-Moving plate; 277-Rotating rod; 278-Half gear; 279-Rack plate; 2791-Clamping claw strip; 2792-Limiting plate; 3-Drive component; 30-Electric telescopic rod; 3 1-Connecting plate; 32-Slide plate; 33-Slide groove; 34-Support plate; 4-Mold component; 40-Positioning pin; 42-Positioning groove; 43-First template; 44-Fixing groove; 45-Hydraulic locking mechanism; 450-Housing shell; 451-Sealing cover; 452-Piston body; 453-Piston rod; 454-Pass component; 4540-Fixing frame; 4541-Moving rod; 4542-Spring; 4543-Plug; 4544-Oil hole; 455-Piston sleeve; 456-Connecting plate; 457-Leaf spring; 458-Partition plate; 46-Second template. Detailed Implementation

[0025] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0026] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0027] Example 1 like Figure 1-6As shown, this utility model provides a quick mold changing device for PET preform molds, including a base 1, clamping mechanisms 2 installed at both ends of the surface of the base 1, a driving component 3 installed on the surface of the base 1, the driving component 3 including an electric telescopic rod 30, the electric telescopic rod 30 being fixedly connected to the surface of the base 1, a connecting plate 31 being fixedly connected to the output end of the electric telescopic rod 30, a support plate 34 being fixedly connected to one side of the connecting plate 31, a sliding plate 32 being fixedly connected to the bottom of the support plate 34, a sliding groove 33 being slidably connected to the surface of the sliding plate 32, a mold component 4 being installed on the upper surface of the support plate 34, the mold component 4 including a positioning pin 40, the positioning pin 40 being fixedly connected to the surface of the support plate 34, a positioning groove 42 being inserted into the surface of the positioning pin 40, a first template 43 and a second template 46 being fixedly connected to the top of the positioning groove 42 respectively, a fixing groove 44 being fixedly connected to both sides of the first template 43 and the second template 46, a hydraulic locking mechanism 45 being installed on the surface of the fixing groove 44, and a connecting groove being opened on the surface of the second template 46; Specifically, when it is necessary to merge the first template 43 and the second template 46, the electric telescopic rod 30 is driven. The electric telescopic rod 30 drives the support plate 34 at one end of the connecting plate 31 to move back and forth. When the support plate 34 moves, it moves on the slide groove 33 through the slide plate 32, thereby driving the first template 43 and the second template 46 to merge. When the first template 43 and the second template 46 are merged, when the clamping mechanism 2 needs to clamp and move the first template 43 and the second template 46, the hydraulic locking mechanism 45 releases the lock on the first template 43 and the second template 46.

[0028] Example 2 like Figure 1-6As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the hydraulic locking mechanism 45 includes a housing 450, which is mounted on the surface of the support plate 34. A sealing cap 451 is fixed to the left end of the housing 450. A piston body 452 is slidably connected to the inner wall of the housing 450. A piston rod 453, which is horizontally arranged and engages with the fixing groove 44, is connected to the right side of the piston body 452. A partition 458, which is fixed between the inner walls of the housing 450, is movably sleeved on the outside of the piston rod 453. A piston sleeve 455, which is movably connected to the partition 458, is fixedly sleeved on the piston rod 453. A connecting plate 456, which is fixedly sleeved on the right side of the partition 458, is provided on the piston rod 453. A leaf spring 457, which is symmetrically arranged, is connected between the connecting plate 456 and the inner wall of the right end of the housing 450. A through piece 454, which is installed on both sides of the housing 450, is provided between the piston body 452 and the partition 458. A through piece 454, which is fixed to the housing 450, is movably sleeved on the outside of the piston rod 453. A partition 458 is placed between the inner walls. A piston sleeve 455, which is movably connected to the partition 458, is fixedly sleeved on the piston rod 453. A sealing cap 451 is fixedly connected to one side of the housing 450. A connecting plate 456, which is fixedly sleeved on the piston rod 453, is provided on the right side of the partition 458. Symmetrically arranged leaf springs 457 are connected between the connecting plate 456 and the inner wall of the right end of the housing 450. A through-hole 454, which is installed on both sides of the housing 450, is provided between the piston body 452 and the partition 458. Component 454 includes an oil hole 4544, which is opened on both sides of the housing 450. Above the oil hole 4544, a fixing bracket 4540 is fixed on the inner wall of the housing 450. The top of the fixing bracket 4540 is movably connected to a vertically arranged movable rod 4541. The bottom end of the movable rod 4541 is connected to a plug 4543 that is sealed in the oil hole 4544. A spring 4542 sleeved on the movable rod 4541 is connected between the plug 4543 and the fixing bracket 4540. Specifically, when no hydraulic oil enters the oil hole 4544, the spring 4542 is compressed, the plug 4543 seals the oil hole 4544, and the leaf spring 457 is pulled, causing the piston rod 453 to engage with the fixed groove 44, thus reducing its diameter. When hydraulic oil flows through the oil hole 4544, the pressure of the hydraulic oil causes the plug 4543 to open upwards, filling the cavity between the piston body 452 and the partition plate 458. Under the pressure of the hydraulic oil, the piston body 452 moves to the left, thus unlocking the piston rod 453. When the hydraulic oil supply stops, no pressure acts on the plug 4543. Under the force of the further compressed spring 4542, the plug 4543 re-seals the oil hole 4544. Under the force of the further pulled leaf spring 457, the piston rod 453 resets and... The sealing cover 451 is bolted to the left end of the housing 450 and engages with the fixing groove 44. The piston body 452 has a concave structure, which facilitates movement under the action of hydraulic oil. The partition plate 458 has a slide hole, and the piston sleeve 455 is slidably fitted in the slide hole. The length of the piston sleeve 455 is greater than the thickness of the partition plate 458, so that it can slide in a relatively sealed manner. The right end of the piston rod 453 has a hemispherical structure, which facilitates engagement. The connecting plate 456 is movably disposed inside the housing 450. The movable rod 4541 has a T-shaped structure, which facilitates opening and closing. The top of the fixing frame 4540 has a movable hole, and the vertical rod of the movable rod 4541 is movably connected in the movable hole. The horizontal rod of the movable rod 4541 is located above the fixing frame 4540. The plug 4543 has a conical structure, and the diameter of the upper end face of the plug 4543 is greater than the inner diameter of the oil hole 4544.

[0029] Example 3 like Figure 1-6As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the clamping mechanism 2 includes a limiting frame 20, which is fixedly connected to the surface of the base 1. A slot 21 is provided on the surface of the limiting frame 20. A motor 22 is fixedly connected to one end of the limiting frame 20. A rotating bolt 23 is fixedly connected to the output end of the motor 22. A moving block 24 is threadedly connected to the surface of the rotating bolt 23. The moving block 24 is movably connected to the surface of the slot 21. A supporting telescopic post 25 is fixedly connected to the surface of the moving block 24. An electric telescopic column 26 is fixedly connected to one side of the supporting telescopic post 25. A clamping claw 27 is fixedly connected to one end of the electric telescopic column 26. The clamping claw 27 includes a mounting frame 270. A support plate 271 is fixedly connected to one end of the electric telescopic column 26. A telescopic controller 272 is installed on the top of the mounting frame 270. A pressure block 273 is fixedly connected to the output end of the telescopic controller 272. Fixed plates 274 are fixedly connected to both sides of the pressure block 273. A short plate 275 is movably connected to one end of the fixed plate 274. A movable plate 276 is fixedly connected to one end of the short plate 275. A rotating rod 277 is fixedly connected to the rear end of the movable plate 276. A half gear 278 is fixedly connected to one end of the rotating rod 277. A rack plate 279 is meshed with one end of the half gear 278. A limit plate 2792 is movably connected to one end of the rack plate 279. A clamping claw strip 2791 is fixedly connected to one end of the rack plate 279. Specifically, when it is necessary to replace the first template 43 and the second template 46, the first template 43 and the second template 46 are released by the hydraulic locking mechanism 45. The motor 22 is started, and the motor 22 drives the rotating bolt 23 to rotate. The rotating bolt 23 drives the moving block 24 to move laterally back and forth on the slot 21, thereby driving the support telescopic pile 25 to move laterally, thereby driving the clamping claw 27 to adjust to the position where the first template 43 and the second template 46 are connected. Then, the support telescopic pile 25 is adjusted to adjust the clamping claw 27 to a suitable height. Then, the telescopic controller 272 is started, and the telescopic controller 272 drives the pressure block 273 to move up and down, so that the movable plate 276 at one end of the short plate 275 moves, thereby causing the half gear 278 to mesh with the rack plate 279. When the pressure block 273 moves upward, the half gear 278... The meshing rack plates 279 approach each other, allowing the gripping claw strips 2791 to open and close with a high degree of freedom, making the movement of the mechanical claws very easy to control. The rear end of the rotating rod 277 is movably connected to the front end of the support plate 271 through a bearing. A sliding groove is provided on one side of the rack plate 279, and the position and size of the sliding groove are adapted to the position and size of the limiting plate 2792, so that the rack plate 279 can slide left and right on the outside of the limiting plate 2792, enhancing the stability of the gripping claw strips 2791, thereby stably gripping the first template 43 and the second template 46. The first template 43 and the second template 46 can be replaced. When the first template 43 and the second template 46 need to be placed and installed, the positioning groove 42 engages with the positioning pin 40. By setting position sensors and pressure sensors, the position and locking status of the mold are monitored in real time.

[0030] The working principle of the quick mold change device for this PET preform mold will be explained in detail below.

[0031] like Figure 1-6As shown, when no hydraulic oil enters the oil hole 4544, the spring 4542 is compressed, the plug 4543 seals the oil hole 4544, and the leaf spring 457 is pulled, causing the piston rod 453 to engage with the fixed groove 44, thus reducing its diameter. When hydraulic oil flows through the oil hole 4544, the pressure of the hydraulic oil causes the plug 4543 to open upwards into the oil hole 4544, filling the cavity between the piston body 452 and the partition plate 458. Under the pressure of the hydraulic oil, the piston body 452 moves to the left, thus unlocking the piston rod 453. When the hydraulic oil supply stops, no pressure acts on the plug 4543, and under the force of the further compressed spring 4542, the plug 4543 re-seals the oil hole 4544. 44. Under the force of the leaf spring 457, which is further pulled by the rope, the piston rod 453 returns to its original position and engages with the fixing groove 44 again. The sealing cover 451 is fixed to the left end of the housing 450 by bolts. The piston body 452 has a concave structure, which facilitates movement under the action of hydraulic oil. The partition plate 458 has a slide hole, and the piston sleeve 455 is slidably fitted in the slide hole. The length of the piston sleeve 455 is greater than the thickness of the partition plate 458, so that it can slide with a relative seal. The right end of the piston rod 453 has a hemispherical structure, which facilitates engagement. The connecting plate 456 is movably set inside the housing 450. The movable rod 4541 has a T-shaped structure, which facilitates opening and closing. The top of the fixing bracket 4540 has a movable hole, and the vertical rod of the movable rod 4541 is movably connected to the... In the movable hole, the transverse rod of the movable rod 4541 is located above the fixed frame 4540. The plug 4543 has a conical structure, and the diameter of the upper end face of the plug 4543 is larger than the inner diameter of the oil hole 4544. When it is necessary to replace the first template 43 and the second template 46, the first template 43 and the second template 46 are released by the hydraulic locking mechanism 45. The motor 22 is started, and the motor 22 drives the rotating bolt 23 to rotate. The rotating bolt 23 drives the moving block 24 to reciprocate laterally on the slot 21, thereby driving the support telescopic pile 25 to move laterally, thereby driving the clamping claw 27 to adjust to the position where the first template 43 and the second template 46 are connected. Then, the support telescopic pile 25 is adjusted to drive the clamping claw 27 to adjust to a suitable height, and then the... The telescopic controller 272 drives the pressure block 273 to move up and down, causing the movable plate 276 at one end of the short plate 275 to move. This allows the half gear 278 to mesh with the rack plate 279. When the pressure block 273 moves upward, the half gear 278 and the rack plate 279 move closer together, causing the gripper 2791 to open and close. This provides a high degree of freedom, making the movement of the mechanical gripper very easy to control. The rear end of the rotating rod 277 is movably connected to the front end of the support plate 271 via a bearing. A sliding groove is provided on one side of the rack plate 279. The position and size of the sliding groove are adapted to the position and size of the limiting plate 2792, allowing the rack plate 279 to slide left and right outside the limiting plate 2792, enhancing the stability of the gripper 2791.This allows for stable clamping of the first template 43 and the second template 46, facilitating their replacement. When the first template 43 and the second template 46 need to be placed and installed, the positioning slot 42 engages with the positioning pin 40. Position and pressure sensors are used to monitor the mold's position and locking status in real time.

[0032] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A quick mold changing device for a PET preform mold, characterized in that, Includes a base (1), with clamping mechanisms (2) installed at both ends of the surface of the base (1), and a driving component (3) installed on the surface of the base (1). The driving component (3) includes an electric telescopic rod (30), which is fixedly connected to the surface of the base (1). A connecting plate (31) is fixedly connected to the output end of the electric telescopic rod (30). A support plate (34) is fixedly connected to one side of the connecting plate (31). A sliding plate (32) is fixedly connected to the bottom of the support plate (34). A sliding groove (33) is slidably connected to the surface of the sliding plate (32). A mold component (4) is installed on the upper surface of the support plate (34). The mold component (4) includes a positioning pin (40). 40) Fixedly connected to the surface of the support plate (34), the positioning pin (40) has a positioning groove (42) inserted into its surface, the top of the positioning groove (42) is fixedly connected to the first template (43) and the second template (46) respectively, the sides of the first template (43) and the second template (46) are fixedly connected to the fixing groove (44) and the surface of the fixing groove (44) is equipped with a hydraulic locking mechanism (45); the hydraulic locking mechanism (45) includes a housing (450), the housing (450) is installed on the surface of the support plate (34), the left end of the housing (450) is fixed with a sealing cap (451), the inner wall of the housing (450) is slidably connected to a piston body (452), the piston body (452) is fixedly connected to the support plate (34) and the positioning groove (450) is fixedly connected to the support plate (34) and the second template (46 ... third template (46) is fixedly connected to the support plate (34) and the second template (46) is fixedly connected to the support plate (34) and the third template (46) is fixedly connected to the support plate (34) and the second template (46) is fixedly connected to the support plate (34) and the second A horizontally arranged piston rod (453) is connected to the right side of the piston body (452). The piston rod (453) is engaged with the fixing groove (44). A partition plate (458) fixed between the inner walls of the housing (450) is movably sleeved on the outside of the piston rod (453). A piston sleeve (455) movably connected to the partition plate (458) is fixedly sleeved on the piston rod (453). A connecting plate (456) fixedly sleeved on the right side of the partition plate (458) is provided on the piston rod (453). A symmetrically arranged leaf spring (457) is connected between the connecting plate (456) and the inner wall of the right end of the housing (450). A through piece (454) installed on both sides of the housing (450) is provided between the piston body (452) and the partition plate (458). The clamping mechanism (2) includes a limiting frame (20), which is fixedly connected to the surface of the base (1). The surface of the limiting frame (20) is provided with a slot (21). One end of the limiting frame (20) is fixedly connected to a motor (22). The output end of the motor (22) is fixedly connected to a rotating bolt (23). The surface of the rotating bolt (23) is threadedly connected to a moving block (24). The moving block (24) is movably connected to the surface of the slot (21). The surface of the moving block (24) is fixedly connected to a supporting telescopic pile (25). One side of the supporting telescopic pile (25) is fixedly connected to an electric telescopic column (26). One end of the electric telescopic column (26) is fixedly connected to a clamping claw (27).

2. The quick mold changing device for PET preform molds according to claim 1, characterized in that: The through-hole (454) includes an oil hole (4544), which is opened on both sides of the housing (450). Above the oil hole (4544) is a fixing bracket (4540) fixed on the inner wall of the housing (450). The top of the fixing bracket (4540) is movably connected to a vertically arranged movable rod (4541). The bottom end of the movable rod (4541) is connected to a plug (4543) that is sealed in the oil hole (4544). A spring (4542) sleeved on the movable rod (4541) is connected between the plug (4543) and the fixing bracket (4540).

3. The quick mold changing device for PET preform molds according to claim 1, characterized in that: The right end of the piston rod (453) has a hemispherical structure, and the connecting plate (456) is movably disposed inside the housing (450).

4. The quick mold changing device for PET preform molds according to claim 1, characterized in that: The clamping claw (27) includes a mounting frame (270), which is fixedly connected to one end of the electric telescopic column (26). A support plate (271) is fixedly connected inside the mounting frame (270). A telescopic controller (272) is mounted on the top of the mounting frame (270). A pressure block (273) is fixedly connected to the output end of the telescopic controller (272). Fixed plates (274) are fixedly connected to both sides of the pressure block (273). A short plate (275) is movably connected to one end of the fixed plate (274). A movable plate (276) is fixedly connected to one end of the short plate (275). (276) has a rotating rod (277) fixedly connected to its rear end. One end of the rotating rod (277) is fixedly connected to a half gear (278). One end of the half gear (278) is meshed with a rack plate (279). One end of the rack plate (279) is movably connected to a limit plate (2792). One end of the rack plate (279) is fixedly connected to a clamping claw strip (2791). The rear end of the rotating rod (277) is movably connected to the front end of the support plate (271) through a bearing. A sliding groove is provided on one side of the rack plate (279). The position and size of the sliding groove are adapted to the position and size of the limit plate (2792).

5. The quick mold changing device for PET preform molds according to claim 1, characterized in that: The electric telescopic rod (30) is connected to the support plate (34) through the connecting plate (31), and the bottom of the support plate (34) is slidably connected to the groove (33) on the surface of the base (1) through the sliding plate (32).

6. The quick mold changing device for PET preform molds according to claim 1, characterized in that: The positioning pin (40) is inserted into the positioning groove (42), and the first template (43) and the second template (46) are engaged with the piston rod (453) through the fixing groove (44).

7. The quick mold changing device for PET preform mold according to claim 1, characterized in that: The motor (22) is threadedly connected to the movable block (24) via a rotating bolt (23), and the movable block (24) is movably connected to the limiting frame (20) via a slot (21).

8. The quick mold changing device for PET preform mold according to claim 4, characterized in that: The telescopic controller (272) is connected to the fixed plate (274) via the pressure block (273), and the fixed plate (274) is movably connected to the movable plate (276) via the short plate (275).

9. The quick mold changing device for PET preform mold according to claim 1, characterized in that: The sealing cap (451) is fixed to the left end of the housing (450) by bolts, and the piston body (452) has a concave structure.

10. The quick mold changing device for a PET preform mold according to claim 4, characterized in that: The half gear (278) meshes with the rack plate (279), and the rack plate (279) is movably connected to the mounting frame (270) through the limiting plate (2792).

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