A preform molding frame

Abstract

This utility model discloses a preform mold clamping frame, including a mounting base, on which a front template and a rear template are mounted. An intermediate template is mounted between the front and rear templates, and the opposite surfaces of the front and intermediate templates form a mold fixing installation area. A mold clamping drive device is provided between the intermediate template and the rear template. A bottom mold mounting plate is fixedly mounted on the mounting base at the mold fixing installation area. A bottom mold fixing plate for fixing the bottom mold is vertically slidably mounted on the bottom mold mounting plate. A drive rod that vertically penetrates the bottom mold mounting plate is also fixed at the bottom of the bottom mold fixing plate. A lifting drive plate is fixed at the bottom of the drive rod. A horizontal drive plate is fixed at the bottom of the intermediate template. A drive groove is provided on the horizontal drive plate, which includes a horizontal groove section and an inclined groove section with a vertical drop. A drive pin is provided on the lifting drive plate. The bottom mold of this preform mold clamping frame can be lifted and lowered by the movement of the intermediate template, thus simplifying the action control.

Description

Technical Field

[0001] This utility model relates to the field of blow molding machine technology, and in particular to a preform mold holder. Background Technology

[0002] Blow molding machines require molds for bottle blowing, which typically include a front mold, a rear mold, and a bottom mold. Each mold is driven by a corresponding drive unit to achieve mold closing and opening. When the mold is closed, bottles are blown; when it is open, bottles are removed and preforms are placed on the mold. When the mold opens, the bottom mold needs to descend to facilitate bottle removal; when the mold closes, the bottom mold needs to rise to the closing position. The bottom mold platen is driven by cylinders and solenoid valves. During mold closing, the cylinders lift the bottom mold to close it; during mold opening, the cylinders descend. This structure increases the cost of the blow molding machine and complicates electrical control, leading to disadvantages such as increased cylinder and solenoid valve components. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a preform mold assembly frame, wherein the bottom mold of the preform mold assembly frame can be raised and lowered by moving the intermediate template, thereby making the action control simpler.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a preform mold clamping frame, including a mounting base, on which a front template and a rear template are mounted via a horizontal connecting rod, and an intermediate template is slidably mounted between the front template and the rear template. The opposite surfaces of the front template and the intermediate template constitute a mold fixing installation area. A mold clamping drive device is provided between the intermediate template and the rear template to drive the intermediate template to move closer to the front template. A bottom mold mounting plate is fixedly mounted on the mounting base at the mold fixing installation area. A bottom mold fixing plate for fixing the bottom mold is vertically slidably mounted on the bottom mold mounting plate. A drive rod that vertically penetrates the bottom mold mounting plate is also fixed at the bottom of the bottom mold fixing plate. A lifting drive plate is fixed at the bottom of the drive rod. A horizontal drive plate is fixed at the bottom of the intermediate template. A drive groove is provided on the horizontal drive plate. The drive groove includes a horizontal groove section and an inclined groove section with a vertical drop. A drive pin is provided on the lifting drive plate located in the drive groove.

[0005] As a preferred embodiment, a fixing block is fixed to the bottom of the intermediate template, and horizontal drive plates are fixed to both sides of the fixing block. The lifting drive plate is located between the two horizontal drive plates, and drive pins are provided on both sides of the lifting drive plate, with the drive pins extending into the drive grooves of the corresponding horizontal drive plates.

[0006] As a preferred embodiment, a fixing locking block is fixedly installed on the bottom mold mounting plate, a bottom mold mounting rod is fixed on the mounting base, the fixing locking block is provided with a locking hole for easy insertion of the bottom mold mounting rod, the fixing locking block is provided with a strip-shaped opening communicating with the locking hole, the strip-shaped opening divides the fixing locking block into two clamping parts, and a locking bolt is provided on the clamping part.

[0007] As a preferred embodiment, one side of the fixing and locking block is also fixed with an air-blowing mounting plate for mounting the air-blowing cooling head.

[0008] As a preferred embodiment, the mounting base is provided with guide rails extending forward and backward, and sliders that slide in cooperation with the guide rails are fixedly provided on the front template, rear template and middle template. There are four horizontal connecting rods that horizontally penetrate the front template, middle template and rear template, and limit nuts are threaded on both ends of the horizontal connecting rods.

[0009] As a preferred embodiment, the mounting base includes an upper mounting plate and a lower mounting plate, which are fixed together by a vertical connecting rod. The guide rail is mounted on the upper mounting plate, and the bottom mold mounting rod is horizontally fixed on the lower mounting plate.

[0010] As a preferred embodiment, a pressure plate is horizontally and elastically slidably mounted on the opposite surfaces of the front template and the middle template. The pressure plates form the mold fixing and mounting area. The front template and the middle template are provided with mounting countersunk holes. A connecting bolt and a compression spring are installed in the mounting countersunk holes. A pressure adjusting nut for fixing the pressure plate is threaded on the connecting bolt. The elastic force of the compression spring forces the pressure plates to move closer to each other.

[0011] As a preferred embodiment, the mold closing drive device includes a drive motor fixedly mounted on the lower mounting plate. A crank is fixed on the output shaft of the drive motor, and the crank is hinged to the lower end of the drive connecting rod. The lower mounting plate is provided with a strip-shaped hole to facilitate the upward extension and penetration of the drive connecting rod. A rear fixed seat and a middle fixed seat are fixed on opposite sides of the rear template and the middle template, respectively. The rear fixed seat is hinged to one end of the rear upper opening and closing connecting rod and the rear lower opening and closing connecting rod. The rear upper opening and closing connecting rod and the rear lower opening and closing connecting rod are arranged parallel to each other. The middle fixed seat is hinged to one end of the upper middle opening and closing connecting rod and the lower middle opening and closing connecting rod. The upper middle opening and closing connecting rod and the lower middle opening and closing connecting rod are arranged parallel to each other. The other ends of the rear upper opening and closing connecting rod and the upper middle opening and closing connecting rod are hinged to the upper middle connecting rod. The other ends of the rear lower opening and closing connecting rod and the lower middle opening and closing connecting rod are hinged to the lower middle connecting rod. The upper end of the drive connecting rod is hinged to the middle of the lower middle connecting rod.

[0012] After adopting the above technical solution, the effect of this utility model is as follows: A preform mold clamping frame includes a mounting base. A front template and a rear template are mounted on the mounting base via a horizontal connecting rod. An intermediate template is slidably mounted between the front and rear templates. The opposing surfaces of the front and intermediate templates constitute a mold fixing installation area. A mold clamping drive device is provided between the intermediate template and the rear template to drive the intermediate template to move towards the front template. A bottom mold mounting plate is fixedly mounted on the mounting base at the mold fixing installation area. A bottom mold fixing plate for fixing the bottom mold is vertically slidably mounted on the bottom mold mounting plate. A drive rod that vertically penetrates the bottom mold mounting plate is also fixed to the bottom of the bottom mold fixing plate. A lifting drive plate is fixed to the bottom of the drive rod. A water... The flat drive plate is provided with a drive groove, which includes a horizontal groove section and an inclined groove section with a vertical drop. The lifting drive plate is provided with a drive pin located in the drive groove. Therefore, during mold closing, the mold closing drive device will drive the intermediate template to move closer to the front template. At the same time as moving closer, the horizontal drive plate moves, causing the drive pin to move relative to the front template in the drive groove. In this way, the drive pin can be driven to descend through the drive groove, thereby forcing the lifting drive plate to descend, and the bottom mold will also descend accordingly. When mold opening is required, the intermediate template moves in the opposite direction, and the bottom mold also moves in the opposite direction and rises, realizing the overall mold opening. This preform mold closing frame can link the lifting of the bottom mold with the horizontal sliding of the intermediate template, saving the bottom mold drive cylinder, simplifying the operation and reducing costs.

[0013] Furthermore, since a fixing block is fixed to the bottom of the intermediate template, and horizontal drive plates are fixed to both sides of the fixing block, and the lifting drive plate is located between the two horizontal drive plates, and drive pins are provided on both sides of the lifting drive plate, with the drive pins extending into the drive grooves of the corresponding horizontal drive plates, the two horizontal drive plates can better drive the lifting drive plate to rise and fall, thereby making the force on the bottom mold lifting more uniform.

[0014] Furthermore, since a fixing locking block is fixedly installed on the bottom mold mounting plate, and a bottom mold mounting rod is fixed on the mounting base, the fixing locking block is provided with a locking hole for easy insertion of the bottom mold mounting rod, and the fixing locking block is provided with a strip-shaped opening communicating with the locking hole. The strip-shaped opening divides the fixing locking block into two clamping parts, and a locking bolt is provided on the clamping part. The fixing locking block can be easily fixed on the bottom mold mounting rod. When the locking bolt is loosened, the position of the bottom mold can be adjusted on the bottom mold mounting rod, making adjustment more convenient.

[0015] Furthermore, since one side of the fixing and locking block is also fixed with an air-blowing mounting plate for installing an air-blowing cooling head, the air-blowing mounting plate can be used to install the air-blowing cooling head to cool the bottle holder of the blow molding machine. When the bottle holder is driven by the chain to circulate, it will also be heated when it enters the heating furnace. Therefore, the air-blowing cooling head can be used to cool the bottle holder, thus preventing the bottle holder from overheating and damaging the bottle mouth.

[0016] Furthermore, since the mounting base is equipped with front and rear extending guide rails, and the front template, rear template, and middle template are all fixedly equipped with sliders that slide in cooperation with the guide rails, and there are four horizontal connecting rods that horizontally penetrate the front template, middle template, and rear template, with limit nuts threaded onto both ends of each horizontal connecting rod, the distance between the front template and the rear template can be adjusted by adjusting the limit nuts. In this way, when the mold closing drive device drives the middle template to slide, the front template and the rear template will be limited by the limit nuts, and then the middle template will continue to move closer to the front template to achieve mold closing. Thus, the position during mold closing can be adjusted by adjusting the distance between the front template and the rear template, making it more adaptable.

[0017] Furthermore, since pressure plates are horizontally and elastically slidably installed on the opposing surfaces of the front template and the middle template, the pressure plates form the mold fixing and installation area. The front template and the middle template are provided with mounting countersunk holes, and connecting bolts and compression springs are installed in the mounting countersunk holes. The connecting bolts are threaded with pressure adjusting nuts to fix the pressure plates. The elastic force of the compression springs forces the pressure plates to move closer to each other. Therefore, the elastic force of the compression springs can increase the mold closing pressure and further improve the blow molding quality. At the same time, due to the action of the compression springs, the spacing between the pressure plates can also be optimized, thereby minimizing the adverse effects caused by the processing and assembly errors of the pressure plates, the middle template, and the front template. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0020] Figure 2 This is a front view of an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the top structure of an embodiment of this utility model;

[0022] Figure 4 yes Figure 3 Structural cross-sectional view along AA;

[0023] Figure 5 This is a right view of an embodiment of the present utility model;

[0024] Figure 6 yes Figure 5 Structural cross-sectional view along BB;

[0025] Figure 7 This is a schematic diagram of an embodiment of the present invention with some structural elements omitted.

[0026] In the attached diagram: 1. Mounting base; 101. Upper mounting plate; 102. Lower mounting plate; 103. Vertical connecting rod; 2. Horizontal connecting rod; 3. Front template; 4. Rear template; 5. Middle template; 6. Mold closing drive device; 61. Drive motor; 62. Drive connecting rod; 9. Drive rod; 10. Lifting drive plate; 11. Horizontal drive plate; 111. Drive groove; 12. Drive pin; 13. Fixing block; 14. Fixing locking block; 141. Locking bolt; 15. Bottom mold mounting rod; 16. Guide rail; 17. Slider; 18. Pressure boosting plate; 19. Pressure adjusting nut; 20. Compression spring; 21. Rear fixed seat; 22. Intermediate fixed seat; 23. Rear upper opening and closing connecting rod; 24. Rear lower opening and closing connecting rod; 25. Upper middle opening and closing connecting rod; 26. Lower middle opening and closing connecting rod; 27. Upper middle connecting rod; 28. Lower middle connecting rod; 29. ​​Limit nut; 30. Air blowing mounting plate. Detailed Implementation

[0027] The present invention will be further described in detail below through specific embodiments.

[0028] like Figure 1-7 As shown, a preform mold clamping frame includes a mounting base 1. A front template 3 and a rear template 4 are mounted on the mounting base 1 via a horizontal connecting rod 2. An intermediate template 5 is slidably mounted between the front template 3 and the rear template 4. The opposing surfaces of the front template 3 and the intermediate template 5 constitute a mold fixing mounting area. A mold clamping drive device 6 is provided between the intermediate template 5 and the rear template 4 to drive the intermediate template 5 to move closer to the front template 3. A bottom mold mounting plate 7 is fixedly mounted on the mounting base 1 at the mold fixing mounting area. A bottom mold fixing plate 8 for fixing the bottom mold is vertically slidably installed on the bottom mold mounting plate 7. A drive rod 9 that vertically penetrates the bottom mold mounting plate 7 is also fixed to the bottom of the bottom mold fixing plate 8. A lifting drive plate 10 is fixed to the bottom of the drive rod 9. A horizontal drive plate 11 is fixed to the bottom of the intermediate template 5. A drive groove 111 is provided on the horizontal drive plate 11. The drive groove 111 includes a horizontal groove section and an inclined groove section with a vertical drop. A drive pin 12 located in the drive groove 111 is provided on the lifting drive plate 10.

[0029] In this embodiment, a fixing block 13 is fixed to the bottom of the intermediate template 5. Horizontal drive plates 11 are fixed to both sides of the fixing block 13. A lifting drive plate 10 is located between the two horizontal drive plates 11. Drive pins 12 are provided on both sides of the lifting drive plate 10, and the drive pins 12 extend into the drive grooves 111 of the corresponding horizontal drive plates 11. A fixing locking block 14 is fixedly installed on the bottom mold mounting plate 7. A bottom mold mounting rod 15 is fixed on the mounting base 1. The fixing locking block 14 has a locking hole for easy insertion of the bottom mold mounting rod 15. A strip-shaped opening communicating with the locking hole is provided on the fixing locking block 14, dividing it into two clamping portions. Locking bolts 141 are provided on the clamping portions. An air-blowing mounting plate 30 for installing an air-blowing cooling head is also fixed to one side of the fixing locking block 14.

[0030] The mounting base 1 is provided with a guide rail 16 extending forward and backward. Slider blocks 17 that slide and engage with the guide rail 16 are fixedly installed on the front template 3, rear template 4, and middle template 5. There are four horizontal connecting rods 2 that horizontally penetrate the front template 3, middle template 5, and rear template 4. Limit nuts 29 are threaded onto both ends of each horizontal connecting rod 2. The mounting base 1 includes an upper mounting plate 101 and a lower mounting plate 102, which are fixed together by a vertical connecting rod 103. The guide rail 16 is mounted on the upper mounting plate 101, and the bottom mold mounting rod 15 is horizontally fixed on the lower mounting plate 102.

[0031] In this embodiment, pressure plates 18 are horizontally and elastically slidably mounted on the opposite surfaces of the front template 3 and the middle template 5. The pressure plates 18 form the mold fixing and mounting area. The front template 3 and the middle template 5 are provided with mounting countersunk holes. Connecting bolts and compression springs 20 are installed in the mounting countersunk holes. Adjusting nuts 19 for fixing the pressure plates 18 are threaded on the connecting bolts. The elastic force of the compression springs 20 forces the pressure plates 18 to move closer to each other. The mold closing drive device 6 includes a drive motor 61 fixedly mounted on the lower mounting plate 102. A crank is fixed on the output shaft of the drive motor 61. The crank is hinged to the lower end of the drive connecting rod 62. The lower mounting plate 102 is provided with a strip-shaped hole for the drive connecting rod 62 to extend upward and pass through. Rear fixing seats 21 and middle fixing seats 22 are fixed on the opposite sides of the rear template 4 and the middle template 5, respectively. The rear fixing seat 21 is hinged to one end of the rear upper opening and closing connecting rod 23 and the rear lower opening and closing connecting rod 24. The upper and lower opening and closing connecting rods 23 and 24 are arranged parallel to each other. The middle fixed seat 22 is hinged to one end of the upper middle opening and closing connecting rod 25 and the lower middle opening and closing connecting rod 26. The upper middle opening and closing connecting rod 25 and the lower middle opening and closing connecting rod 26 are arranged parallel to each other. The other end of the upper rear opening and closing connecting rod 23 and the other end of the upper middle opening and closing connecting rod 25 are hinged to the upper middle connecting rod 27. The other end of the lower rear opening and closing connecting rod 24 and the other end of the lower middle opening and closing connecting rod 26 are hinged to the lower middle connecting rod 28. The upper end of the driving connecting rod 62 is hinged to the middle of the lower middle connecting rod.

[0032] During use, when the mold is closed, the drive motor 61 drives the drive connecting rod 62 downward via the crank. The upper rear opening connecting rod 23 and the upper middle opening connecting rod 25 are separated and in a horizontal state, while the lower rear opening connecting rod 24 and the lower middle opening connecting rod 26 are also separated and in a horizontal state. The middle template 5 moves closer to the front template 3. At the same time as they move closer, the horizontal drive plate 11 moves, causing the drive pin 12 to move relative to each other within the drive groove 111. The drive pin 12 descends, thereby forcing the lifting drive plate 10 to descend, the bottom mold fixing plate 8 to descend, and the bottom mold to descend accordingly. When the mold needs to be opened, the drive motor 61 drives the upper rear opening connecting rod 62 downward via the crank. The motor 61 drives the drive connecting rod 62 upward via a crank. The upper rear opening / closing connecting rod 23 and the upper middle opening / closing connecting rod 25 move closer together, as do the lower rear opening / closing connecting rod 24 and the lower middle opening / closing connecting rod 26. This causes the middle template 5 to move closer to the rear template 4, and the horizontal drive plate 11 moves, causing the drive pin 12 to move relative to the drive groove 111. The drive pin 12 rises, forcing the lifting drive plate 10 to rise, and the bottom mold fixing plate 8 to rise. The bottom mold rises accordingly, achieving overall mold opening. The bottle holder can also be cooled using the air-blowing cooling head mounted on the air-blowing mounting plate 30. Furthermore, the spring force of the compression spring 20 increases the mold closing pressure, further improving the blown bottle quality.

[0033] The directions mentioned in the embodiments are all in the form of up and down. Figure 1 For reference only, this embodiment shows the bottom mold facing down and the bottle opening facing up. In daily use, the orientation of the bottle opening can be adjusted according to different needs.

[0034] The pneumatic system, servo motor and other actuators, gear transmission mechanism, and lead screw and nut mechanism mentioned in this embodiment are all current conventional technologies. The 5th edition of the "Mechanical Design Handbook" published in Beijing in April 2008 (5th edition, 28th printing) details the specific structure, principle, and other designs of cylinders, motors, and other transmission mechanisms, which are existing technologies with clear and straightforward structures. The 3rd edition of "Modern Practical Pneumatic Technology" SMC training materials published by Machinery Industry Press on August 1, 2008, details vacuum components, gas circuits, and program control, indicating that the pneumatic structure in this embodiment is also existing technology and clear and straightforward. The book "Motor Drive and Speed ​​Regulation" published by Chemical Industry Press on July 1, 2015, also details motor control and limit switches. Therefore, the circuit and pneumatic connections are clear.

[0035] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and alterations to the technical solution of the present utility model without departing from its design spirit shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. A preform mold clamping frame, comprising a mounting base, on which a front template and a rear template are mounted via a horizontal connecting rod, an intermediate template is slidably mounted between the front and rear templates, the opposing surfaces of the front and intermediate templates constitute a mold fixing mounting area, and a mold clamping drive device is provided between the intermediate template and the rear template to drive the intermediate template to move closer to the front template, characterized in that: A bottom mold mounting plate is fixedly installed on the mounting base at the mold fixing installation area. A bottom mold fixing plate for fixing the bottom mold is vertically slidably installed on the bottom mold mounting plate. A drive rod that vertically penetrates the bottom mold mounting plate is also fixed at the bottom of the bottom mold fixing plate. A lifting drive plate is fixed at the bottom of the drive rod. A horizontal drive plate is fixed at the bottom of the intermediate template. A drive groove is provided on the horizontal drive plate. The drive groove includes a horizontal groove section and an inclined groove section with a vertical drop. A drive pin is provided on the lifting drive plate located in the drive groove.

2. A bottle preform assembly fixture as in claim 1 wherein: The bottom of the intermediate template is fixed with a fixing block, and the horizontal drive plates are fixed on both sides of the fixing block. The lifting drive plate is located between the two horizontal drive plates, and the driving pins are provided on both sides of the lifting drive plate. The driving pins extend into the driving grooves of the corresponding horizontal drive plates.

3. A bottle preform assembly fixture as in claim 2 wherein: A fixing locking block is fixedly installed on the bottom mold mounting plate, and a bottom mold mounting rod is fixed on the mounting base. The fixing locking block is provided with a locking hole for easy insertion of the bottom mold mounting rod. The fixing locking block is provided with a strip-shaped opening that communicates with the locking hole. The strip-shaped opening divides the fixing locking block into two clamping parts, and a locking bolt is provided on the clamping part.

4. A preform assembly as defined in claim 3, wherein: One side of the fixing and locking block is also fixed with an air-blowing mounting plate for installing the air-blowing cooling head.

5. A preform assembly as defined in claim 4, wherein: The mounting base is provided with guide rails extending forward and backward. The front template, rear template and middle template are all fixedly provided with sliders that slide with the guide rails. There are four horizontal connecting rods that horizontally pass through the front template, middle template and rear template. Limit nuts are threaded on both ends of the horizontal connecting rods.

6. A preform assembly as defined in claim 5, wherein: The mounting base includes an upper mounting plate and a lower mounting plate, which are fixed together by a vertical connecting rod. The guide rail is mounted on the upper mounting plate, and the bottom mold mounting rod is horizontally fixed on the lower mounting plate.

7. A preform assembly as defined in claim 6, wherein: Pressure plates are horizontally and elastically slidably installed on the opposite surfaces of the front template and the middle template. The pressure plates form the mold fixing and installation area. The front template and the middle template are provided with mounting countersunk holes. Connecting bolts and compression springs are installed in the mounting countersunk holes. Adjusting nuts for fixing the pressure plates are threaded on the connecting bolts. The elastic force of the compression springs forces the pressure plates to move closer to each other.

8. A preform assembly as defined in claim 7, wherein: The mold closing drive device includes a drive motor fixedly mounted on the lower mounting plate. A crank is fixed on the output shaft of the drive motor. The crank is hinged to the lower end of the drive connecting rod. The lower mounting plate is provided with a strip-shaped hole to facilitate the upward extension and penetration of the drive connecting rod. A rear fixed seat and a middle fixed seat are fixed on opposite sides of the rear template and the middle template, respectively. The rear fixed seat is hinged to one end of the rear upper opening and closing connecting rod and the rear lower opening and closing connecting rod. The rear upper opening and closing connecting rod and the rear lower opening and closing connecting rod are arranged parallel to each other. The middle fixed seat is hinged to one end of the upper middle opening and closing connecting rod and the lower middle opening and closing connecting rod. The upper middle opening and closing connecting rod and the lower middle opening and closing connecting rod are arranged parallel to each other. The other ends of the rear upper opening and closing connecting rod and the upper middle opening and closing connecting rod are hinged to the upper middle connecting rod. The other ends of the rear lower opening and closing connecting rod and the lower middle opening and closing connecting rod are hinged to the lower middle connecting rod. The upper end of the drive connecting rod is hinged to the middle of the lower middle connecting rod.

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