Blow mold facilitating demolding

Abstract

The application belongs to the technical field of blow molding molds and discloses a blow molding mold facilitating demolding, which comprises a processing box, the processing box is a hollow structure with an open top, a plurality of sliding plates are slidably arranged in the processing box, a positioning pipe for positioning a bottle blank is arranged through the top of each sliding plate, the number of the positioning pipes is equal to that of the sliding plates and the positions of the positioning pipes correspond to those of the sliding plates one by one, a forming mechanism is arranged on the processing box, a blow molding mechanism is arranged on the processing box, and a displacement mechanism is arranged on the processing box. According to the application, the bottle blank is first sleeved on the positioning pipe, then the blow molding work is performed on the bottle blank by the forming mechanism and the blow molding mechanism, in the process, other bottle blanks can be sequentially placed on other positioning pipes, when one of the bottle blanks is processed and formed, the displacement mechanism can sequentially move the other bottle blanks to the positions of the forming mechanism and the blow molding mechanism and perform the forming work, and the blow molding efficiency of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of blow molding mold technology, and in particular to a blow molding mold that is easy to demold. Background Technology

[0002] There are many types of blow molding, among which the method of blow molding a preform is called injection stretch blow molding. In injection stretch blow molding, the plastic raw material is first injected into the mold by the injection molding machine to form a preform (preform) with a closed bottom. Then the preform is transferred to the blow molding mold and blown into shape by compressed air.

[0003] Chinese utility model patent CN213675412U discloses an automatic demolding device for a blow molding machine, comprising a blow molding machine body, which includes a blow nozzle and a worktable. A left half mold and a right half mold are respectively located on the lower sides of the blow nozzle. Telescopic cylinders are fixedly installed on both side walls of the blow molding machine body, and the output ends of the telescopic cylinders are fixedly connected to the corresponding left and right half molds. Two supports are slidably connected to the top of the worktable, and guide rods are fixedly connected inside the worktable. The lower parts of the supports are slidably connected to the worktable. The support is connected to the guide rod. The top of each support is connected to a column via bearings. The bottom of the support is fixedly connected to a motor via bolts. The output end of the motor is fixedly connected to the lower end of the column. A positioning post is fixedly connected to the middle of the upper end of each column. A first plastic threaded insert and a second plastic threaded insert are respectively fitted onto the two positioning posts. The first and second plastic threaded inserts are positioned directly below the blow molding nozzle and are located in the middle between the left and right halves of the mold. In this type of automatic demolding device for blow molding, after completing the blow molding of one product, the finished product must be removed from the first and second plastic threaded inserts before another product to be processed can be installed onto them. This operation method is not conducive to improving the overall processing efficiency of the device. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a blow molding die that facilitates demolding.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a blow molding mold that is easy to demold, comprising a processing box, wherein the processing box is a hollow structure with an open top, and multiple sliding plates are slidably arranged inside the processing box. A positioning tube for positioning the preform is provided through the top of the sliding plate. The number of positioning tubes is equal to the number of sliding plates and their positions correspond one-to-one. A forming mechanism for forming the preform is provided on the processing box. A blow molding mechanism for inflating and pressurizing the preform is provided on the processing box. A displacement mechanism for driving the multiple sliding plates to move is provided on the processing box.

[0006] By adopting the above technical solution, the preform is first placed on the positioning tube, and then blow-molded by the forming mechanism and the blow molding mechanism. During this process, other preforms can be placed on other positioning tubes in sequence. After one preform is formed, the other preforms can be moved to the positions of the forming mechanism and the blow molding mechanism in sequence by the displacement mechanism and formed, thereby improving the blow molding efficiency of the device.

[0007] Furthermore, the displacement mechanism includes a drive rod rotatably mounted inside the processing box, a main synchronous pulley fixedly sleeved on the drive rod, a driven rod rotatably mounted inside the processing box, a secondary synchronous pulley fixedly sleeved on the driven rod, a synchronous belt for connecting the main synchronous pulley and the secondary synchronous pulley, and a motor fixed to the processing box and driving the drive rod to rotate. The synchronous belt meshes with both the main synchronous pulley and the secondary synchronous pulley.

[0008] By adopting the above technical solution, after the motor works, it drives the driving rod to rotate, which causes the main synchronous pulley connected to the driving rod, the synchronous belt connected to the main synchronous pulley, the driven synchronous pulley connected to the synchronous belt, and the driven rod connected to the driven synchronous pulley to all rotate, thereby achieving the purpose of moving multiple sliding plates.

[0009] Furthermore, the molding mechanism includes an L-shaped mounting bracket fixed to the processing box, a sliding block slidably mounted on the mounting bracket, a molding die fixed on the sliding block, and a cylinder fixed to the mounting bracket. The piston rod end of the cylinder is fixed to the molding die. A molding groove is provided on the side wall of the molding die away from the cylinder. The molding mechanism is provided in two sets and symmetrically arranged about the middle of the processing box. When the two molding dies are pressed together, the lower ends of the two sets of molding grooves clamp the preform.

[0010] By adopting the above technical solution, when the preform moves to the position between the two molding molds, the cylinder works and extends its piston rod, so that the two molding molds come closer to each other and fit together. At this time, the lower end of the molding groove on the molding mold clamps the preform to ensure normal blow molding.

[0011] Furthermore, the blow molding mechanism includes a blow molding assembly, which includes an air blowing pipe slidably disposed within the processing box, a lifting block fixed to a sliding block and having an L-shaped structure, an mounting block slidably disposed within the processing box, and a telescopic pipe fixed and connected to the bottom of the air blowing pipe. The telescopic pipe is connected to an external high-pressure air supply device and is equipped with a solenoid valve. The air blowing pipe passes through the top of the mounting block and is fixed. The horizontal section of the lifting block passes through the side wall of the processing box and is slidably engaged. Inclined surfaces are provided at the junction of the bottom of the mounting block and the side walls on both sides of the mounting block. The distance between the two sets of inclined surfaces gradually decreases from top to bottom. Rollers that are rotatably mounted on the lifting block and are rolledly connected to the inclined surfaces on the mounting block are also rotatably mounted on the lifting block. The blow molding mechanism also includes a reset assembly for driving the air blowing pipe to descend.

[0012] By adopting the above technical solution, during the process of the two sets of molding molds approaching and fitting together, the two sets of sliding blocks, the two sets of lifting blocks, and the two sets of rollers all move closer to each other. The rollers will move from the inclined surface of the mounting block to the bottom of the mounting block. Since the distance between the two inclined surfaces gradually decreases from top to bottom, the mounting block drives the air blowing pipe to rise until the air blowing pipe is inserted into the positioning tube. At this time, the solenoid valve is opened, and the external high-pressure air supply equipment first discharges high-pressure gas from the telescopic pipe into the air blowing pipe, then from the air blowing pipe into the positioning tube, and finally from the positioning tube into the preform, so as to increase the internal pressure of the preform and deform it to ensure normal blow molding.

[0013] Furthermore, the reset assembly includes a vertical rod fixed to the mounting block and a sleeve fixed to the bottom wall of the processing box. The vertical rod passes through the sleeve and is slidably engaged. The reset assembly also includes a limiting block fixed to the lower end of the vertical rod and a reset spring fixed between the limiting block and the top wall of the sleeve.

[0014] By adopting the above technical solution, during the process of the mounting block rising, the vertical rod connected to the mounting block and the limiting block connected to the vertical rod both rise, the return spring is stressed and gradually contracts, and during the process of lifting the block and moving away from the mounting block, the return spring gradually extends and resets, so that the limiting block connected to the return spring, the vertical rod connected to the limiting block, the mounting block connected to the vertical rod, and the air blowing pipe connected to the mounting block all fall and reset, thereby achieving the purpose of separating the air blowing pipe from the positioning pipe.

[0015] Furthermore, the horizontal end of the mounting bracket is provided with a sliding through hole that slides with the sliding block. A sliding rod is fixed in the sliding through hole. The sliding rod passes through the sliding block and slides with it. The number of sliding through holes, the number of sliding rods and the number of sliding blocks are all equal and their positions correspond one-to-one.

[0016] By adopting the above technical solution, during the movement of the molding die, the sliding block will move along the side wall of the sliding rod inside the sliding through hole, which improves the stability of the molding die movement.

[0017] Furthermore, a crossbar is fixed inside the processing box, and the crossbar passes through multiple sliding plates and is slidably engaged.

[0018] By adopting the above technical solution, the design of the crossbar improves the stability of the sliding plate during movement.

[0019] Furthermore, the bottom of the positioning tube has an insertion hole communicating with the interior of the positioning tube, the inner diameter of the insertion hole gradually increasing from top to bottom. The top of the air blowing tube and the junction of the air blowing tube sidewall have a conical surface that engages with the insertion hole, the outer diameter of the conical surface gradually increasing from top to bottom. In summary, this utility model has the following beneficial effects: In this application, by setting multiple sliding plates, multiple positioning tubes, and a displacement mechanism, the blow molding efficiency of the device is improved. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0021] Figure 2 This is a cross-sectional schematic diagram of an embodiment of the present invention used to highlight the internal structure of the processing box;

[0022] Figure 3 This is a schematic diagram illustrating the connection structure between the sliding plate and the crossbar in an embodiment of this utility model;

[0023] Figure 4 This is a cross-sectional schematic diagram of an embodiment of the present invention, highlighting the connection structure between the vertical rod and the sleeve. In the figure: 1. Processing box; 2. Sliding plate; 3. Positioning tube; 4. Forming mechanism; 41. Mounting bracket; 42. Sliding block; 43. Forming mold; 44. Cylinder; 5. Blow molding mechanism; 51. Blow molding assembly; 511. Air blowing pipe; 512. Lifting block; 513. Mounting block; 514. Telescopic tube; 52. Reset assembly; 521. Vertical rod; 522. Sleeve; 523. Limiting block; 524. Reset spring; 6. Displacement mechanism; 61. Driving rod; 62. Main synchronous pulley; 63. Driven rod; 64. Driven synchronous pulley; 65. Synchronous belt; 66. Motor; 7. Sliding through hole; 8. Sliding rod; 9. Crossbar; 10. Roller. Detailed Implementation

[0024] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] like Figure 1-4As shown in the illustration, this application discloses a blow molding die that facilitates demolding, including a processing box 1, a displacement mechanism 6, a forming mechanism 4, and a blow molding mechanism 5. The processing box 1 is a hollow structure with an open top. Multiple sliding plates 2 are slidably arranged inside the processing box 1. Positioning tubes 3 for positioning preforms are penetrated through the top of each sliding plate 2. The number of positioning tubes 3 is equal to the number of sliding plates 2, and their positions correspond one-to-one. First, the preform is placed on the positioning tubes 3. Then, the forming mechanism 4 and the blow molding mechanism 5 perform blow molding on the preform. During this process, other preforms can be sequentially placed on other positioning tubes 3. After one preform is formed, the displacement mechanism 6 can sequentially move the other preforms to the positions of the forming mechanism 4 and the blow molding mechanism 5 for further forming, thus improving the blow molding efficiency of the device.

[0026] A displacement mechanism 6 is mounted on the processing box 1 and is used to drive multiple sliding plates 2 to move. The displacement mechanism 6 includes a driving rod 61, a main synchronous pulley 62, a driven rod 63, a driven synchronous pulley 64, and a synchronous belt 65. The driving rod 61 is rotatably mounted inside the processing box 1. The main synchronous pulley 62 is fixedly sleeved on the driving rod 61, and the driven rod 63 is rotatably mounted inside the processing box 1. The driven synchronous pulley 64 is fixedly sleeved on the driven rod 63. The synchronous belt 65 connects the main synchronous pulley 62 and the driven synchronous pulley 64. The synchronous belt 65 meshes with both the main synchronous pulley 62 and the driven synchronous pulley 64. A motor 66 is fixed to the processing box 1 and drives the driving rod 61 to rotate. After the motor 66 operates, it drives the driving rod 61 to rotate, causing the main synchronous pulley 62 connected to the driving rod 61, the synchronous belt 65 connected to the main synchronous pulley 62, the driven synchronous pulley 64 connected to the synchronous belt 65, and the driven rod 63 connected to the driven synchronous pulley 64 to all rotate, thereby achieving the purpose of moving the multiple sliding plates 2.

[0027] The molding mechanism 4 is mounted on the processing box 1 and is used to mold the preform. The molding mechanism 4 includes a mounting frame 41, a sliding block 42, a molding die 43, and a cylinder 44. The mounting frame 41 is fixed to the processing box 1 and has an L-shaped structure. The sliding block 42 is slidably mounted on the mounting frame 41, and the molding die 43 is fixed to the sliding block 42. A molding groove is provided on the side wall of the molding die 43 away from the cylinder 44. The molding mechanism 4 has two sets of these grooves, symmetrically arranged about the center of the processing box 1. When the two molding dies 43 are pressed together, the lower ends of the two sets of molding grooves clamp the preform. The cylinder 44 is fixed to the mounting frame 41, and the piston rod end of the cylinder 44 is fixed to the molding die 43. When the preform moves to the position between the two sets of molding dies 43, the cylinder 44 extends its piston rod, causing the two sets of molding dies 43 to move closer and fit together. At this time, the lower ends of the molding grooves on the molding die 43 clamp the preform, ensuring normal blow molding operation.

[0028] A blow molding mechanism 5 is mounted on the processing box 1 and is used to inflate and pressurize the preform. The blow molding mechanism 5 includes a blow molding assembly 51 and a reset assembly 52. ​​The blow molding assembly 51 includes an air blowing pipe 511, a lifting block 512, a mounting block 513, and a telescopic pipe 514. The air blowing pipe 511 is slidably disposed within the processing box 1, passing through the top of the mounting block 513 and being fixed. The lifting block 512 is fixed to the sliding block 42 and has an L-shaped structure. The horizontal section of the lifting block 512 passes through the side wall of the processing box 1 and is slidably engaged. The mounting block 513 is slidably disposed within the processing box 1, and inclined surfaces are provided at the junction of the bottom of the mounting block 513 and the side walls on both sides of the mounting block 513. The distance between the two sets of inclined surfaces gradually decreases from top to bottom. Rollers 10 are rotatably mounted on the lifting block 512 and are rolledly connected to the inclined surfaces on the mounting block 513. The telescopic tube 514 is fixed and connected to the bottom of the air blowing tube 511. The telescopic tube 514 is connected to the external high-pressure air supply equipment and is equipped with a solenoid valve. During the process of the two sets of molding molds 43 approaching and fitting together, the two sets of sliding blocks 42, the two sets of lifting blocks 512, and the two sets of rollers 10 all move closer to each other. The rollers 10 will move from the inclined surface of the mounting block 513 to the bottom of the mounting block 513. Since the distance between the two inclined surfaces gradually decreases from top to bottom, the mounting block 513 drives the air blowing tube 511 to rise until the air blowing tube 511 is inserted into the positioning tube 3. At this time, the solenoid valve is opened, and the external high-pressure air supply equipment first discharges high-pressure gas from the telescopic tube 514 into the air blowing tube 511, then from the air blowing tube 511 into the positioning tube 3, and finally from the positioning tube 3 into the preform, which increases the internal pressure of the preform and deforms it to ensure normal blow molding.

[0029] The reset assembly 52 is used to drive the air pipe 511 down. The reset assembly 52 includes a vertical rod 521, a sleeve 522, a limiting block 523, and a reset spring 524. The vertical rod 521 is fixed to the mounting block 513, and the sleeve 522 is fixed to the inner bottom wall of the processing box 1. The vertical rod 521 passes through the sleeve 522 and is slidably engaged. The limiting block 523 is fixed to the lower end of the vertical rod 521, and the reset spring 524 is fixed between the limiting block 523 and the inner top wall of the sleeve 522. During the upward movement of the mounting block 513, the vertical rod 521 connected to the mounting block 513 and the limiting block 523 connected to the vertical rod 521 both rise. The return spring 524 is stressed and gradually contracts. During the process of lifting the block 512 and moving away from the mounting block 513, the return spring 524 gradually extends and resets, causing the limiting block 523 connected to the return spring 524, the vertical rod 521 connected to the limiting block 523, the mounting block 513 connected to the vertical rod 521, and the air blowing pipe 511 connected to the mounting block 513 to all descend and reset, thereby achieving the purpose of separating the air blowing pipe 511 from the positioning pipe 3.

[0030] The horizontal end of the mounting bracket 41 has a sliding through hole 7 that slides with the sliding block 42. A sliding rod 8 is fixed inside the sliding through hole 7, and the sliding rod 8 passes through the sliding block 42 and slides with it. The number of sliding through holes 7, the number of sliding rods 8 and the number of sliding blocks 42 are all equal and their positions correspond one-to-one. During the movement of the molding die 43, the sliding block 42 will move along the side wall of the sliding rod 8 inside the sliding through hole 7, which improves the stability of the movement of the molding die 43.

[0031] A crossbar 9 is fixed inside the processing box 1. The crossbar 9 passes through multiple sliding plates 2 and is slidably engaged. The crossbar 9 improves the stability of the sliding plates 2 during movement.

[0032] The bottom of the positioning tube 3 has an insertion hole communicating with the interior of the positioning tube 3. The inner diameter of the insertion hole gradually increases from top to bottom. At the junction of the top of the air blowing tube 511 and the side wall of the air blowing tube 511, a conical surface is provided to engage with the insertion hole. The outer diameter of the conical surface gradually increases from top to bottom. The above description is only a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model's concept are within the protection scope of this utility model. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A blow mold for easy demolding, comprising a processing box (1), characterized in that: The processing box (1) is a hollow structure with an open top. Multiple sliding plates (2) are slidably arranged inside the processing box (1). A positioning tube (3) for positioning the bottle preform is provided through the top of the sliding plate (2). The number of positioning tubes (3) is equal to the number of sliding plates (2) and their positions correspond one-to-one. A forming mechanism (4) for forming the bottle preform is provided on the processing box (1). A blow molding mechanism (5) for inflating and pressurizing the bottle preform is provided on the processing box (1). A displacement mechanism (6) for driving the multiple sliding plates (2) to move is provided on the processing box (1).

2. The blow mold for easy demolding according to claim 1, characterized in that: The displacement mechanism (6) includes an active rod (61) rotatably mounted in the processing box (1), a main synchronous pulley (62) fixedly sleeved on the active rod (61), a driven rod (63) rotatably mounted in the processing box (1), a driven synchronous pulley (64) fixedly sleeved on the driven rod (63), a synchronous belt (65) for connecting the main synchronous pulley (62) and the driven synchronous pulley (64), and a motor (66) fixed on the processing box (1) and driving the active rod (61) to rotate. The synchronous belt (65) meshes with both the main synchronous pulley (62) and the driven synchronous pulley (64).

3. The blow mold for easy demolding according to claim 1, characterized in that: The molding mechanism (4) includes an L-shaped mounting bracket (41) fixed on the processing box (1), a sliding block (42) slidably disposed on the mounting bracket (41), a molding die (43) fixed on the sliding block (42), and a cylinder (44) fixed on the mounting bracket (41). The piston rod end of the cylinder (44) is fixed to the molding die (43). A molding groove is provided on the side wall of the molding die (43) away from the cylinder (44). The molding mechanism (4) is provided with two sets of molding grooves symmetrically disposed about the middle of the processing box (1). When the two molding dies (43) are pressed together, the lower ends of the two sets of molding grooves clamp the preform.

4. The blow mold for easy demolding according to claim 3, characterized in that: The blow molding mechanism (5) includes a blow molding assembly (51), which includes an air blowing pipe (511) slidably disposed in the processing box (1), a lifting block (512) fixed on the sliding block (42) and having an L-shaped structure, a mounting block (513) slidably disposed in the processing box (1), and a telescopic pipe (514) fixed and connected to the bottom of the air blowing pipe (511). The telescopic pipe (514) is connected to an external high-pressure air supply device, and a solenoid valve is provided on the telescopic pipe (514). The air blowing pipe (511) passes through the mounting block (42). The top of the mounting block (513) is fixed, and the horizontal section of the lifting block (512) passes through the side wall of the processing box (1) and slides in fit. The bottom of the mounting block (513) and the junction of the side walls on both sides of the mounting block (513) are provided with inclined surfaces. The distance between the two sets of inclined surfaces gradually decreases from top to bottom. The lifting block (512) is rotatably mounted with rollers (10) that are rolledly connected to the inclined surfaces on the mounting block (513). The blow molding mechanism (5) also includes a reset assembly (52) for driving the air pipe (511) down.

5. A blow mold for easy demolding according to claim 4, characterized in that: The reset assembly (52) includes a vertical rod (521) fixed on the mounting block (513) and a sleeve (522) fixed on the inner bottom wall of the processing box (1). The vertical rod (521) passes through the sleeve (522) and is slidably engaged. The reset assembly (52) also includes a limiting block (523) fixed at the lower end of the vertical rod (521) and a reset spring (524) fixed between the limiting block (523) and the inner top wall of the sleeve (522).

6. A blow mold for easy demolding according to claim 3, characterized in that: The horizontal end of the mounting bracket (41) is provided with a sliding through hole (7) that slides and engages with the sliding block (42). A sliding rod (8) is fixed inside the sliding through hole (7). The sliding rod (8) passes through the sliding block (42) and slides and engages with it. The number of sliding through holes (7), the number of sliding rods (8) and the number of sliding blocks (42) are all equal and their positions correspond one-to-one.

7. A blow mold for easy demolding according to claim 1, characterized in that: The processing box (1) is fixed with a crossbar (9), and the crossbar (9) passes through multiple sliding plates (2) and slides in cooperation with them.

8. A blow mold for easy demolding according to claim 4, characterized in that: The bottom of the positioning tube (3) is provided with an insertion hole that communicates with the inside of the positioning tube (3). The inner diameter of the insertion hole gradually increases from top to bottom. The top of the air blowing tube (511) and the junction of the side wall of the air blowing tube (511) are provided with a conical surface that is inserted into the insertion hole. The outer diameter of the conical surface gradually increases from top to bottom.

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