A device for rapid mold change of plastic bottle blow molding

Abstract

The utility model belongs to the technical field of plastic bottle blow molding, especially for a kind of for plastic bottle blow molding quick die changing equipment, including the base used by plastic bottle blow molding, upper die, lower die and four different height intermediate die, the top of base is fixedly connected with support plate, the bottom top of base is fixedly connected with cover and box, cover and four intermediate die between them are provided with quick die changing mechanism, spacing adjusting mechanism is provided between support plate, upper die and lower die, fixed switching mechanism is provided between box and cover.The utility model structure design is reasonable, through fixed switching mechanism, when upper die and lower die and intermediate die are disassembled, the positioning of intermediate die can be fixed, ensure that disassembly can be carried out smoothly, avoid the wear and tear between upper die, middle die and lower die, through quick die changing, the intermediate die of corresponding height can be rotated to between upper die and lower die quickly and accurately, improve the efficiency of die changing, avoid the waste of time caused by the need for fine adjustment due to deviation.

Description

Technical Field

[0001] This utility model relates to the field of plastic bottle blow molding technology, and in particular to a quick mold change device for plastic bottle blow molding. Background Technology

[0002] Blow molding, also known as hollow blow molding, is a rapidly developing plastic processing method. The tubular plastic preform obtained by extrusion or injection molding of thermoplastic resin is placed in a split mold while hot (or heated to a softened state). After the mold is closed, compressed air is immediately introduced into the preform, causing the plastic preform to inflate and adhere tightly to the inner wall of the mold. After cooling and demolding, various hollow products are obtained. With the advent of high-density polyethylene and the development of blow molding machines, blow molding technology has been widely used.

[0003] In the blow molding process of plastic bottles, the length of the finished vertical plastic bottle depends on the mold. If you want to change the length of the produced plastic bottle during the production process, you need to replace the entire mold. However, replacing the entire mold takes a long time and is inconvenient for switching between molds, which greatly reduces the efficiency of blow molding of plastic bottles. Therefore, we propose a quick mold change equipment for blow molding of plastic bottles to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings mentioned above by proposing a rapid mold change device for blow molding of plastic bottles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A quick mold changing device for blow molding of plastic bottles includes a base, an upper mold, a lower mold, and four intermediate molds of different heights. A support plate is fixedly connected to the top of the base, and a cover and a box are fixedly connected to the top of the bottom of the base. A quick mold changing mechanism is provided between the cover and the four intermediate molds. A spacing adjustment mechanism is provided between the support plate, the upper mold, and the lower mold. A fixed switching mechanism is provided between the box and the cover. A controller is fixedly connected to one side of the support plate.

[0007] Preferably, the spacing adjustment mechanism includes a groove formed on one side of the support plate and a drive motor fixedly connected to the top of the support plate. A bidirectional lead screw is fixedly connected to the output shaft of the drive motor. Two drive blocks are threaded on the outer side of the bidirectional lead screw. A connecting rod is fixedly connected to one side of each of the two drive blocks. The upper mold and the lower mold are respectively fixedly connected to one end of the corresponding connecting rod.

[0008] Preferably, both drive blocks are slidably fitted into the groove.

[0009] Preferably, the fixed switching mechanism includes two return springs and a left gear fixedly sleeved on the outside of the bidirectional lead screw. The ends of the two return springs that are far apart from each other are fixedly connected to the inner walls of both sides of the housing. The ends of the two return springs that are close to each other are fixedly connected to a movable plate. Two iron blocks are fixedly connected to one side of the movable plate. Electromagnets are fixedly connected to the upper and lower inner walls of the housing. The two electromagnets are attracted to the corresponding iron blocks. Slide rods are fixedly connected to both sides of the movable plate. A left arc-shaped internal gear ring is fixedly connected to one end of the slide rod at the left end. The left arc-shaped internal gear ring cooperates with the left gear. A right arc-shaped internal gear ring is fixedly connected to one end of the slide rod at the right end.

[0010] Preferably, the movable plate is slidably sleeved inside the box, and two return springs are respectively sleeved on the outside of the corresponding slide rod.

[0011] Preferably, the quick mold changing mechanism has a main shaft rotatably connected between the cover and the base and a rotating shaft rotatably connected to the top of the cover. A grooved wheel and a right gear are fixedly fitted onto the outer side of the main shaft from top to bottom. The right gear meshes with a right arc-shaped internal gear ring. A turntable is fixedly connected to the lower end of the rotating shaft, and a lever is fixedly connected to the top of the turntable. The lever engages with the grooved wheel. A mounting base is fixedly connected to the top of the main shaft. Fixing rods are fixedly connected to the outer perimeter of the mounting base. Two clamping semi-rings are provided on one side of each fixing rod. The inner clamping semi-ring is fixedly connected to the outer end of the corresponding fixing rod. The two clamping semi-rings are rotatably connected. The intermediate mold is movably fitted inside the two clamping semi-rings. Ear plates are fixedly connected to the front of each clamping semi-ring, and bolts are threaded onto the ear plates.

[0012] Preferably, four positioning posts are fixedly connected to the upper mold and the lower mold on their respective sides that are close to each other, and four positioning grooves are opened on the upper and lower surfaces of the intermediate mold, with the positioning posts cooperating with the positioning grooves.

[0013] Preferably, the top end of the rotating shaft extends above the cover and is fixedly connected to a handwheel.

[0014] In this utility model, a quick mold-changing device for blow molding plastic bottles is described. When blow molding plastic bottles of different lengths is required, the controller activates two electromagnets, causing them to attract two iron blocks and a moving plate to the right. This causes the left gear and the left arc-shaped internal gear ring to move away from each other, preventing the bidirectional lead screw from locking. Simultaneously, the right gear and the right arc-shaped internal gear ring engage, locking the main shaft. This prevents wear on the upper, middle, and lower molds due to misalignment when the intermediate mold separates from the upper and lower molds, making separation smoother and more convenient. The motor drives the rotation of the bidirectional lead screw, which in turn moves the two drive blocks away from the upper and lower dies to a sufficient distance. Then, the electromagnet is disconnected by the controller. At this time, the left gear and the left arc-shaped internal gear ring come closer together to lock the bidirectional lead screw, while the right gear and the right arc-shaped internal gear ring move away without locking the main shaft. By rotating the rotating shaft, turntable and lever through the handwheel, each rotation of the lever can move the grooved wheel and the main shaft by 90 degrees, thereby rotating the intermediate die of the corresponding height between the upper and lower dies, improving the accuracy of the alignment of the upper, middle and lower dies.

[0015] In this utility model, a quick mold-changing device for blow molding of plastic bottles is described. After the mold changing is completed, following the steps above, the controller activates two electromagnets, causing the left gear to move away from the left arc-shaped internal gear ring without locking the bidirectional lead screw. At the same time, the right gear engages with the right arc-shaped internal gear ring. Then, the drive motor is activated, causing the upper and lower molds to approach each other and abut against the middle mold. Simultaneously, the positioning pin is inserted into the positioning groove for positioning and splicing, preventing the main shaft from deflecting and causing inaccurate splicing. Finally, the left gear and the left arc-shaped internal gear ring approach and abut against each other to lock the bidirectional lead screw, while the right gear and the right arc-shaped internal gear ring move away without locking the main shaft. This locks the bidirectional lead screw and the upper and lower molds. Under the action of the positioning pin and the positioning groove, the middle mold is locked, improving the stability during splicing and blow molding, thereby improving the quality of blow molding of plastic bottles.

[0016] This utility model has a reasonable structural design. Through the fixed switching mechanism, the intermediate mold can be positioned and fixed when the upper and lower molds and the intermediate mold are disassembled and assembled, ensuring that the disassembly and assembly can be carried out smoothly and avoiding wear between the upper, middle and lower molds. Through quick mold changing, the intermediate mold of the corresponding height can be quickly and accurately rotated between the upper and lower molds, improving the efficiency of mold changing and avoiding the waste of time due to the need for fine adjustment when the mold is offset. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a quick mold change device for blow molding of plastic bottles proposed in this utility model;

[0018] Figure 2 This is a partial sectional view of a quick mold change device for blow molding of plastic bottles proposed in this utility model;

[0019] Figure 3 for Figure 2 A schematic diagram of the structure of part A;

[0020] Figure 4 This is a schematic diagram of the grooved wheel and the actuating rod of a quick mold changing device for blow molding of plastic bottles proposed in this utility model.

[0021] In the diagram: 1. Base; 2. Cover; 3. Box; 4. Support plate; 5. Controller; 6. Spacing adjustment mechanism; 7. Fixed switching mechanism; 8. Quick mold changing mechanism; 61. Drive motor; 62. Groove; 63. Drive block; 64. Connecting rod; 65. Upper mold; 66. Positioning pin; 67. Lower mold; 68. Bidirectional lead screw; 71. Left gear; 72. Left arc-shaped internal gear ring; 73. Moving plate; 74. 75. Slide rod; 76. Right arc-shaped internal gear ring; 77. Right gear; 78. Iron block; 79. Electromagnet; 801. Return spring; 802. Main shaft; 803. Handwheel; 804. Mounting base; 805. Fixing rod; 806. Intermediate mold; 807. Bolt; 808. Clamping half ring; 809. Ear plate; 810. Positioning groove; 811. Turntable; 812. Rotating shaft; 813. Grooved wheel; 814. Actuating rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figures 1-4 A quick mold changing device for blow molding of plastic bottles includes a base 1, an upper mold 65, a lower mold 67, and four intermediate molds 805 of different heights. A support plate 4 is fixedly connected to the top of the base 1, and a cover 2 and a box 3 are fixedly connected to the bottom and top of the base 1. A quick mold changing mechanism 8 is provided between the cover 2 and the four intermediate molds 805. A spacing adjustment mechanism 6 is provided between the support plate 4, the upper mold 65, and the lower mold 67. A fixed switching mechanism 7 is provided between the box 3 and the cover 2. A controller 5 is fixedly connected to one side of the support plate 4.

[0024] Furthermore, refer to Figure 1 and Figure 2 The spacing adjustment mechanism 6 includes a groove 62 formed on one side of the support plate 4 and a drive motor 61 fixedly connected to the top of the support plate 4. A bidirectional lead screw 68 is fixedly connected to the output shaft of the drive motor 61. Two drive blocks 63 are threaded on the outer side of the bidirectional lead screw 68. A connecting rod 64 is fixedly connected to one side of each of the two drive blocks 63. The upper mold 65 and the lower mold 67 are respectively fixedly connected to one end of the corresponding connecting rod 64. Both drive blocks 63 are slidably sleeved in the groove 62.

[0025] The above solution is adopted as follows: the drive motor 61 drives the rotation of the bidirectional lead screw 68, and the bidirectional lead screw 68 drives the two drive blocks 63 to move away from the upper and lower dies to a sufficient distance so as to replace the intermediate mold 805. After the replacement is completed, the drive motor 61 is started in reverse, and the bidirectional lead screw 68 drives the two drive blocks 63 to move closer to the upper and lower dies and abut against the intermediate mold 805. At the same time, the positioning pin 66 is inserted into the positioning groove 809 for positioning and splicing, so as to avoid the spindle 801 from deflecting and thus failing to splice accurately.

[0026] Furthermore, refer to Figures 1-3 The fixed switching mechanism 7 includes two return springs 79 and a left gear 71 fixedly sleeved on the outside of the bidirectional lead screw 68. The ends of the two return springs 79 that are far apart from each other are fixedly connected to the inner walls of the two sides of the housing 3, and the ends of the two return springs 79 that are close to each other are fixedly connected to a moving plate 73. Two iron blocks 77 are fixedly connected to one side of the moving plate 73. Electromagnets 78 are fixedly connected to the upper and lower inner walls of the housing 3. The two electromagnets 78 are attracted to the corresponding iron blocks 77. Slide rods 74 are fixedly connected to both sides of the moving plate 73. A left arc-shaped internal gear ring 72 is fixedly connected to one end of the slide rod 74 at the left end. The left arc-shaped internal gear ring 72 cooperates with the left gear 71. A right arc-shaped internal gear ring 75 is fixedly connected to one end of the slide rod 74 at the right end.

[0027] The above solution allows for switching between locking the bidirectional lead screw 68 and locking the main spindle 801. When locking the main spindle 801, the intermediate mold 805 can be positioned and fixed, ensuring smooth assembly and disassembly and preventing increased wear due to misalignment of the upper, middle and lower molds.

[0028] Furthermore, the movable plate 73 is slidably sleeved inside the housing 3, and two return springs 79 are respectively sleeved on the outside of the corresponding slide rods 74, which facilitates the guidance of the movable plate 73 and the return springs 79, making their movement more stable.

[0029] Furthermore, refer to Figure 1 , Figure 2 and Figure 4The quick mold changing mechanism 8 is rotatably connected to a main shaft 801 between the cover 2 and the base 1, and to a rotating shaft 811 rotatably connected to the top of the cover 2. A grooved wheel 812 and a right gear 76 are fixedly fitted onto the outer side of the main shaft 801 from top to bottom. The right gear 76 meshes with a right arc-shaped internal gear ring 75. A turntable 810 is fixedly connected to the lower end of the rotating shaft 811, and an actuating rod 813 is fixedly connected to the top of the turntable 810. The actuating rod 813 cooperates with the grooved wheel 812. The top end of the main shaft 801 is fixedly connected to... A mounting base 803 is provided, and fixing rods 804 are fixedly connected to the outer perimeter of the mounting base 803. Two clamping semi-rings 807 are provided on one side of the fixing rods 804. The inner clamping semi-rings 807 are fixedly connected to the outer end of the corresponding fixing rods 804. The two clamping semi-rings 807 are rotatably connected. The intermediate mold 805 is movably sleeved in the two clamping semi-rings 807. Ear plates 808 are fixedly connected to the front side of the two clamping semi-rings 807. Bolts 806 are threadedly connected to the two ear plates 808.

[0030] The above solution is adopted: by rotating the rotating shaft 811, the turntable 810 and the actuating rod 813 through the handwheel 802, the actuating rod 813 can rotate the grooved wheel 812 and the main shaft 801 by 90 degrees for each rotation, thereby rotating the intermediate mold 805 of the corresponding height between the upper and lower molds, improving the accuracy of the alignment of the upper, middle and lower molds, avoiding the need for fine adjustment due to misalignment and the waste of time. The setting of two clamping half rings 807, ear plates 808 and bolts 806 facilitates the disassembly and replacement of the intermediate mold 805.

[0031] Furthermore, four positioning posts 66 are fixedly connected to the upper mold 65 and the lower mold 67 on their respective sides that are close to each other. Four positioning grooves 809 are opened on the upper and lower surfaces of the middle mold 805. The positioning posts 66 and the positioning grooves 809 cooperate to facilitate precise docking between the upper, middle and lower molds.

[0032] Furthermore, the top of the rotating shaft 811 extends to the top of the cover 2 and is fixedly connected to a handwheel 802, which facilitates the rotation of the rotating shaft 811.

[0033] In this invention, when blow molding plastic bottles of different lengths is required, the controller 5 activates two electromagnets 78, causing them to attract two iron blocks 77 and the moving plate 73 to the right. This causes the left gear 71 and the left arc-shaped internal gear ring 72 to move away from each other, preventing the bidirectional lead screw 68 from locking. Simultaneously, the right gear 76 abuts and meshes with the right arc-shaped internal gear ring 75, thereby locking the main shaft 801. This prevents wear on the upper, middle, and lower molds due to deflection and misalignment when the intermediate mold 805 separates from the upper and lower molds, making separation smoother and more convenient. The drive motor 61 drives the rotation of the bidirectional lead screw 68, which in turn moves the two drive blocks 63 away from the upper and lower dies to a sufficient distance. Then, the controller 5 disconnects the electromagnet 78. At this time, the left gear 71 and the left arc-shaped internal gear ring 72 approach and abut against each other, locking the bidirectional lead screw 68. At the same time, the right gear 76 and the right arc-shaped internal gear ring 75 move away from each other, without locking the main shaft 801. The handwheel 802 rotates the rotating shaft 811, the turntable 810, and the actuating lever 813. Each rotation of the actuating lever 813 moves the grooved wheel 812. Rotating 90 degrees relative to the main shaft 801 allows the intermediate mold 805 of the corresponding height to be rotated between the upper and lower molds, improving the accuracy of the alignment between the upper, middle, and lower molds. After mold changing is completed, following the above steps, the controller 5 activates two electromagnets 78, causing the left gear 71 to move away from the left arc-shaped internal gear ring 72 without locking the bidirectional lead screw 68. Simultaneously, the right gear 76 engages with the right arc-shaped internal gear ring 75. Then, the drive motor 61 is activated, causing the upper and lower molds to move closer together and abut against the intermediate mold 805. At the same time, the positioning pin 66 inserts into the positioning groove 8. Positioning and splicing are performed within 09 to prevent the main shaft 801 from deflecting and causing inaccurate splicing. Finally, the left gear 71 and the left arc-shaped internal gear ring 72 approach and abut against each other to lock the bidirectional lead screw 68. At the same time, the right gear 76 and the right arc-shaped internal gear ring 75 move away from each other and do not lock the main shaft 801. This allows the bidirectional lead screw 68 to be locked, which in turn locks the upper and lower molds. Under the action of the positioning pin 66 and the positioning groove 809, the intermediate mold 805 can be locked, improving the stability during splicing and blow molding, and thus improving the quality of plastic bottle blow molding.

Claims

1. A quick mold change device for blow molding of plastic bottles, characterized in that, The device includes a base (1), an upper mold (65), a lower mold (67), and four intermediate molds (805) of different heights used for blow molding of plastic bottles. A support plate (4) is fixedly connected to the top of the base (1). A cover (2) and a box (3) are fixedly connected to the bottom top of the base (1). A quick mold changing mechanism (8) is provided between the cover (2) and the four intermediate molds (805). A spacing adjustment mechanism (6) is provided between the support plate (4), the upper mold (65), and the lower mold (67). A fixed switching mechanism (7) is provided between the box (3) and the cover (2). A controller (5) is fixedly connected to one side of the support plate (4).

2. The quick mold change equipment for blow molding of plastic bottles according to claim 1, characterized in that, The spacing adjustment mechanism (6) includes a groove (62) on one side of the support plate (4) and a drive motor (61) fixedly connected to the top of the support plate (4). A bidirectional lead screw (68) is fixedly connected to the output shaft of the drive motor (61). Two drive blocks (63) are threaded on the outer side of the bidirectional lead screw (68). A connecting rod (64) is fixedly connected to one side of each of the two drive blocks (63). The upper mold (65) and the lower mold (67) are respectively fixedly connected to one end of the corresponding connecting rod (64).

3. The quick mold change equipment for blow molding of plastic bottles according to claim 2, characterized in that, Both drive blocks (63) are slidably fitted inside the groove (62).

4. A quick mold change device for blow molding of plastic bottles according to claim 2, characterized in that, The fixed switching mechanism (7) includes two return springs (79) and a left gear (71) fixedly sleeved on the outside of the bidirectional lead screw (68). The ends of the two return springs (79) that are far apart from each other are fixedly connected to the inner walls of the two sides of the housing (3). The ends of the two return springs (79) that are close to each other are fixedly connected to a moving plate (73). Two iron blocks (77) are fixedly connected to one side of the moving plate (73). Electromagnets (78) are fixedly connected to the upper and lower inner walls of the housing (3). The two electromagnets (78) are attracted to the corresponding iron blocks (77). Slide rods (74) are fixedly connected to both sides of the moving plate (73). A left arc-shaped internal gear ring (72) is fixedly connected to one end of the slide rod (74) at the left end. The left arc-shaped internal gear ring (72) cooperates with the left gear (71). A right arc-shaped internal gear ring (75) is fixedly connected to one end of the slide rod (74) at the right end.

5. A quick mold change device for blow molding of plastic bottles according to claim 4, characterized in that, The movable plate (73) is slidably sleeved inside the box (3), and two return springs (79) are respectively sleeved on the outside of the corresponding slide rod (74).

6. A quick mold change device for blow molding of plastic bottles according to claim 4, characterized in that, The quick mold changing mechanism (8) is rotatably connected between the main shaft (801) of the cover (2) and the base (1) and the rotating shaft (811) of the top of the cover (2). The outer side of the main shaft (801) is fixedly fitted with a grooved wheel (812) and a right gear (76) from top to bottom. The right gear (76) meshes with the right arc-shaped internal gear ring (75). The lower end of the rotating shaft (811) is fixedly connected to a turntable (810). The top of the turntable (810) is fixedly connected to a lever (813). The lever (813) cooperates with the grooved wheel (812). The main shaft (801) is rotatably connected to the base (1) and the base (2). 1) The top end is fixedly connected to a mounting base (803). The mounting base (803) is fixedly connected to a fixing rod (804) on all four sides of its outer side. Two clamping half rings (807) are provided on one side of the fixing rod (804). The inner clamping half ring (807) is fixedly connected to the outer end of the corresponding fixing rod (804). The two clamping half rings (807) are rotatably connected. The intermediate mold (805) is movably sleeved in the two clamping half rings (807). The front side of the two clamping half rings (807) is fixedly connected to an ear plate (808). Bolts (806) are threadedly connected to the two ear plates (808).

7. A quick mold change device for blow molding of plastic bottles according to claim 1, characterized in that, The upper mold (65) and the lower mold (67) are each fixedly connected to four positioning posts (66) on their respective sides that are close to each other. The upper and lower surfaces of the intermediate mold (805) are provided with four positioning grooves (809), and the positioning posts (66) cooperate with the positioning grooves (809).

8. A quick mold change device for blow molding of plastic bottles according to claim 6, characterized in that, The top of the rotating shaft (811) extends above the cover (2) and is fixedly connected to a handwheel (802).

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