A preform blow molding apparatus

Abstract

The application discloses a prefabricated part blow molding device, and relates to the field of blow molding devices, which comprises a blow molding base, both ends of the blow molding base are fixedly provided with support plates, an extrusion pipe is arranged between the two support plates, the extrusion pipe is fixedly connected with one of the support plates, two symmetrical blow molding molds are arranged between the two support plates, a mold closing assembly is arranged between the two blow molding molds and the blow molding base, a lifting blow film assembly is arranged between the two blow molding molds, and a waste collecting assembly is arranged on one side of the blow molding base. When the plastic material in the two blow molding molds is blow molded, the prefabricated part and the blow molded part are directly combined to be blow molded, so that the prefabricated part and the blow molded part are integrated, thereby the connection mode of traditional parts is reduced to buckles or screws, the service life is long, and the risk that gaps are generated between workpieces and the workpieces are separated is reduced.

Description

Technical Field

[0001] This application relates to the field of blow molding apparatus, and more particularly to a preform blow molding apparatus. Background Technology

[0002] Blow molding equipment is a type of molding equipment that uses compressed air to inflate molten plastic and adhere it to the surface of a mold cavity. After cooling and solidification, hollow plastic products are obtained. It is widely used in packaging containers, automotive parts, and household appliance housings, and has advantages such as high production efficiency, uniform wall thickness, and the ability to mold complex curved surfaces.

[0003] When existing blow molding equipment is used to mold products with prefabricated inserts, it is often necessary to mechanically connect the inserts to the blow molded parts in subsequent processes using clips or screws.

[0004] After long-term use, due to material aging, vibration, or temperature difference deformation, gaps are easily generated between the insert and the plastic part, causing the connection to loosen or even fall off, which not only affects the product life but also increases assembly processes and costs. Utility Model Content

[0005] The purpose of this application is to address the problem mentioned in the background art that gaps easily form between inserts and plastic parts due to material aging, vibration, or temperature difference deformation, leading to loose connections or even detachment, which affects product lifespan and increases assembly processes and costs. This application provides a preform blow molding device.

[0006] To achieve the above objectives, this application specifically adopts the following technical solution: A preform blow molding device includes a blow molding base, with support plates fixed at both ends of the blow molding base. An extrusion pipe is provided between the two support plates and is fixedly connected to one of the support plates. Two symmetrical blow molding molds are provided between the two support plates. A mold closing assembly is provided between the two blow molding molds and the blow molding base. A lifting blow molding assembly is provided between the two blow molding molds. A waste collection assembly is provided on one side of the blow molding base.

[0007] By adopting the above technical solution, the preform is placed into the corresponding position of the two blow molding molds. When the plastic material in the two blow molding molds is blow molded, the preform and the blow molded part are directly blow molded together, so that the preform and the blow molded part are integrated into one piece. This can reduce the risk of traditional parts being connected by clips or screws, which are prone to gaps and falling off over time.

[0008] Furthermore, the lifting blown film assembly includes a blown rod disposed between two blown molds, a lifting seat fixed at the bottom of the blown rod, a hydraulic lifting rod disposed between the lifting seat and the blown base, the bottom of the hydraulic lifting rod being fixedly connected to the blown base, the lifting end of the hydraulic lifting rod being fixedly connected to the lifting seat, and the two blown molds having rod grooves corresponding to the blown rod.

[0009] By adopting the above technical solution, the blow molding rod is placed between two blow molding molds. When the two blow molding molds are closed, the blow molding rod is sandwiched in the middle. After blow molding, the blow molding rod descends and the blow molded part is removed from the blow molding rod. This makes it convenient to blow mold the plastic material between the two blow molding molds and to remove the blow molded part from the blow molding rod.

[0010] Furthermore, the mold clamping assembly includes two mold seats symmetrically arranged between two support plates. The two blow molds are fixedly connected to the corresponding mold seats. Each of the two support plates is fixed with a mold clamping hydraulic rod. The telescopic end of the mold clamping hydraulic rod is fixedly connected to the corresponding mold seat. Each of the two mold seats is fixed with a limit block. A limit rod is fixed between the two support plates. The limit rod passes through the two limit blocks and is slidably connected to the limit blocks.

[0011] By adopting the above technical solution, the mold base supports the blow mold, and the limiting rod limits the movement of the mold base, thereby facilitating the movement of the two blow molds.

[0012] Furthermore, each of the two mold bases has a movable base fixed to its bottom, and the bottom of the movable base has two symmetrical movable rails slidably connected to it, which are fixedly connected to the blow molding base.

[0013] By adopting the above technical solution, the movable seat moves on the movable rail, and the movable seat drives the mold seat, thereby making it easy for the mold seat to move on the blow molding base.

[0014] Furthermore, two symmetrical limiting rods are fixed between the two support plates. The limiting rods pass through the two movable seats and are slidably connected to the movable seats.

[0015] By adopting the above technical solution, when the moving seat moves, the limiting rod two limits the moving seat, thereby reducing the possibility of misalignment between the two moving seats.

[0016] Furthermore, the waste collection assembly includes a collection frame fixed to one side of the blow molding base, a support rod fixed above the collection frame, two symmetrical moving blocks slidably connected to the support rod, a cutting rod fixed to the moving blocks, a bidirectional threaded rod rotatably connected to the support rod, the bidirectional threaded rod being threadedly connected to the two moving blocks, a servo motor fixed to one end of the support rod, the output end of the servo motor passing through the support rod and fixedly connected to the bidirectional threaded rod.

[0017] By adopting the above technical solution, the support rod moves the cutting rod to the bottom of the extrusion tube, allowing the two cutting rods to cut off the residual plastic material, thereby reducing the possibility that the residual plastic material on the extrusion tube will affect the subsequent discharge.

[0018] Furthermore, a rack is fixed on the first support rod, and a second support rod is slidably connected to the rack. The second support rod is fixedly connected to the collection frame. A gear is rotatably connected to the second support rod, and the gear meshes with the rack. A second servo motor is fixed on the second support rod, and the output end of the second servo motor passes through the second support rod and is fixedly connected to the gear.

[0019] By adopting the above technical solution, the gear drives the rack to move, and the rack drives the support rod one to move on the support rod two, so that the support rod one can be easily inserted into the extrusion tube.

[0020] Furthermore, a receiving frame is fixed to the bottom of the rack, the receiving frame corresponds to the two cutting rods, a receiving baffle is rotatably connected to the bottom of the receiving frame, a servo motor three is fixed on the receiving frame, the output end of the servo motor three passes through the receiving frame and is fixedly connected to the rotating edge of the receiving baffle.

[0021] By adopting the above technical solution, a receiving frame is fixed on the rack, and the receiving frame is located below the cutting rod, so that the cut plastic material can be received and recycled.

[0022] In summary, this application includes at least one of the following beneficial effects; 1. In this application, when the two blow molding molds are open, the operator places the preform into the grooves of the two blow molding molds. Then, the operator presses the start switch, causing the extrusion tube to extrude plastic material exceeding the length of the blow molding mold. Simultaneously, the material is fitted onto the blow molding rod. Then, the clamping hydraulic rods on the two support plates push the mold base, allowing the mold base to move on the moving rail under the support of the moving seat. Limiting rod one on the mold base and limiting rod two on the moving seat ensure that the mold base can precisely close the blow molding molds together. The two blow molding molds clamp the blow molding rod, and the material is blown... The blow molding rod blows plastic into two blow molds, and the bulging plastic material fixes the preforms in the blow molds together. After cooling, the mold base moves the two blow molds away from each other, and the hydraulic lifting rod moves the lifting seat down, which in turn moves the blow molding rod down. Finally, the operator removes the formed blow molded part from the blow molding rod and puts a new preform into the blow mold to continue the production of blow molded parts. This achieves the goal of reducing the risk of gaps and detachment between parts caused by the traditional connection method of clips or screws, which is prone to occur over time.

[0023] 2. In this application, after the operator removes the blow-molded part between two blow molds, a servo motor 2 drives a gear to rotate. The gear drives a rack to move on a support rod 2. The rack drives a support rod 1, which in turn drives two cutting rods located below the extrusion tube. Then, the servo motor 1 drives a bidirectional threaded rod to rotate. The bidirectional threaded rod drives two moving blocks closer together, which in turn drive the cutting rods closer together. The cutting rods cut off the remaining plastic material in the extrusion tube, which falls directly into the receiving frame. Then, the servo motor 2 drives a gear, which drives a rack, which in turn moves the support rod 1 above the collection frame. Finally, the servo motor 3 drives a receiving baffle to rotate, opening the receiving baffle on the receiving frame. Excess plastic material falls directly into the collection frame for centralized recycling, thus reducing the impact on subsequent material output and facilitating the recycling of residual plastic material in the extrusion tube. Attached Figure Description

[0024] Figure 1 This is a first three-dimensional structural schematic diagram of the preform blow molding device in this application; Figure 2 This is a second three-dimensional structural schematic diagram of the preform blow molding device in this application; Figure 3 This is a third perspective structural diagram of the preform blow molding device in this application; Figure 4 This is a partial structural diagram of the waste collection component in this application.

[0025] Explanation of reference numerals in the attached figures: 1. Blow molding base; 2. Support plate; 3. Extrusion tube; 4. Blow molding mold; 5. Mold closing assembly; 51. Mold seat; 52. Mold closing hydraulic rod; 53. Limiting block; 54. Limiting rod one; 55. Moving seat; 56. Moving rail; 57. Limiting rod two; 6. Lifting blow molding assembly; 61. Blow molding rod; 62. Lifting seat; 63. Hydraulic lifting rod; 64. Rod groove; 7. Waste collection assembly; 71. Collection frame; 72. Supporting rod one; 73. Cutting rod; 74. Two-way threaded rod; 75. Moving block; 76. Supporting rod two; 77. Rack; 78. Gear; 8. Receiving frame; 9. Receiving baffle. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0027] This application discloses a preform blow molding apparatus.

[0028] Reference Figure 1 , Figure 2 and Figure 3 A preform blow molding device includes a blow molding base 1, with support plates 2 fixed at both ends of the blow molding base 1. An extrusion pipe 3 is provided between the two support plates 2 and is fixedly connected to one of the support plates 2. Two symmetrical blow molding molds 4 are provided between the two support plates 2. A mold closing assembly 5 is provided between the two blow molding molds 4 and the blow molding base 1. A lifting blow molding assembly 6 is provided between the two blow molding molds 4. A waste collection assembly 7 is provided on one side of the blow molding base 1.

[0029] During the blow molding operation of preforms, the blow mold 4 between the two support plates 2 is first opened using the mold clamping assembly 5. The operator places the corresponding preform into the grooves of the two blow molds 4. The grooves in the blow molds 4 support the preform. The extrusion pipe 3 is connected to an external plastic conveying machine, allowing the extrusion pipe 3 to extrude strips of plastic. The length of the strips extends beyond the blow molds 4, and the mold clamping assembly 5 drives the blow molds 4 to close together. The two blow molds 4 clamp the lifting blow molding assembly in the middle. The lifting blow molding assembly blows the plastic between the two blow molds 4, causing the plastic material between the two blow molds 4 to bulge. Simultaneously, as the plastic material bulges, it is pushed back into the blow mold 4. The preform is wrapped in the mold and fixed to the blow molding mold 4. After blow molding, the two blow molding molds 4 move away from each other. The operator removes the mold and the waste collection component 7 cuts and recycles the plastic material at the end of the extrusion tube 3. The operator continues to put the preform into the blow molding mold 4 and repeats the above molding process. By placing the preform into the corresponding position of the two blow molding molds 4, the preform and the blow molded part are directly blow molded together when the plastic material in the two blow molding molds 4 is blow molded. This makes the preform and the blow molded part integrated into one, thereby reducing the risk of gaps and detachment between parts that are easily generated between the parts due to the traditional connection method of buckles or screws after long-term use.

[0030] Reference Figure 1 and Figure 2 The lifting blown film assembly 6 includes a blown rod 61 disposed between two blown molds 4. A lifting seat 62 is fixed to the bottom of the blown rod 61. A hydraulic lifting rod 63 is disposed between the lifting seat 62 and the blown base 1. The bottom of the hydraulic lifting rod 63 is fixedly connected to the blown base 1. The lifting end of the hydraulic lifting rod 63 is fixedly connected to the lifting seat 62. The two blown molds 4 are provided with rod grooves 64 corresponding to the blown rod 61.

[0031] In addition, the mold clamping assembly 5 includes two mold seats 51 symmetrically arranged between the two support plates 2. The two blow molds 4 are fixedly connected to the corresponding mold seats 51. Each of the two support plates 2 is fixed with a mold clamping hydraulic rod 52. The telescopic end of the mold clamping hydraulic rod 52 is fixedly connected to the corresponding mold seat 51. Each of the two mold seats 51 is fixed with a limit block 53. A limit rod 54 is fixed between the two support plates 2. The limit rod 54 passes through the two limit blocks 53 and is slidably connected to the limit blocks 53.

[0032] Furthermore, each of the two mold bases 51 has a movable base 55 fixed at its bottom. The movable base 55 has two symmetrical movable rails 56 slidably connected to its bottom, and the movable rails 56 are fixedly connected to the blow molding base 1.

[0033] Furthermore, two symmetrical limiting rods 57 are fixed between the two support plates 2. The limiting rods 57 pass through the two movable seats 55 and are slidably connected to the movable seats 55.

[0034] When the two blow molds 4 are opened, the operator places the preform into the grooves of the two blow molds 4. Then, the operator presses the start switch, causing the extrusion tube 3 to extrude plastic material exceeding the length of the blow molds 4. Simultaneously, the material is fitted onto the blow molding rod 61. Then, the clamping hydraulic rods 52 on the two support plates 2 push the mold base 51, allowing the mold base 51 to move on the moving rail 56 under the support of the moving seat 55. The limiting rod 54 on the mold base 51 and the limiting rod 57 on the moving seat 55 ensure that the mold base 51 can drive the blow molds 4 to close precisely. The two blow molds 4 clamp the blow molding rod 61, and the blow molding rod 61 blows the plastic in the two blow molds 4. The bulging plastic material fixes the preform in the blow molds 4. After cooling, the mold base 51 moves the two blow molds 4 away from each other. The hydraulic lifting rod 63 lowers the lifting seat 62, which in turn lowers the blow molding rod 61. Finally, the operator removes the molded blow molded part from the blow molding rod 61 and places a new preform into the blow mold 4 to continue the production of the blow molded part. The plastic material is extruded through the extrusion tube 3 and fitted onto the blow molding rod 61. Then, the mold base 51 moves the blow molds 4 together. The blow molding rod 61 blow molds the plastic material in the two molds, fixing the blow molded part and the preform placed in the blow mold 4 together. This reduces the risk of gaps and detachment that can easily occur between parts due to the traditional connection method of clips or screws over time.

[0035] Reference Figure 2 , Figure 3 and Figure 4 The waste collection assembly 7 includes a collection frame 71 fixed to one side of the blow molding base 1. A support rod 72 is fixed above the collection frame 71. Two symmetrical moving blocks 75 are slidably connected to the support rod 72. A cutting rod 73 is fixed to the moving blocks 75. A bidirectional threaded rod 74 is rotatably connected to the support rod 72. The bidirectional threaded rod 74 is threadedly connected to the two moving blocks 75. A servo motor is fixed to one end of the support rod 72. The output end of the servo motor passes through the support rod 72 and is fixedly connected to the bidirectional threaded rod 74.

[0036] In addition, a rack 77 is fixed on the first support rod 72, and a second support rod 76 is slidably connected to the rack 77. The second support rod 76 is fixedly connected to the collection frame 71. A gear 78 is rotatably connected to the second support rod 76, and the gear 78 meshes with the rack 77. A second servo motor is fixed on the second support rod 76, and the output end of the second servo motor passes through the second support rod 76 and is fixedly connected to the gear 78.

[0037] Furthermore, a receiving frame 8 is fixed at the bottom of the rack 77, and the receiving frame 8 corresponds to the two cutting rods 73. A receiving baffle 9 is rotatably connected to the bottom of the receiving frame 8. A servo motor 3 is fixed on the receiving frame 8, and the output end of the servo motor 3 passes through the receiving frame 8 and is fixedly connected to the rotating edge of the receiving baffle 9.

[0038] After the operator removes the blow-molded part between the two blow molds 4, the servo motor 2 drives the gear 78 to rotate. The gear 78 drives the rack 77 to move on the support rod 76. The rack 77 drives the support rod 72. The support rod 72 drives the two cutting rods 73 to be positioned below the extrusion tube 3. Then, the servo motor 1 drives the bidirectional threaded rod 74 to rotate. The bidirectional threaded rod 74 drives the two moving blocks 75 to move closer together. The two moving blocks 75 drive the cutting rods 73 to move closer together. The cutting rods 73 cut off the remaining plastic material in the extrusion tube 3. The remaining plastic material falls directly into the receiving frame 8. The second servo motor drives the gear 78, which in turn drives the rack 77. The rack 77 then moves the first support rod 72 above the collection frame 71. The third servo motor then drives the receiving baffle 9 to rotate, causing the receiving baffle 9 to open on the receiving frame 8. Excess plastic material falls directly into the collection frame 71 for centralized recycling. After the blow molding is completed, the first support rod 72 is extended below the extrusion tube 3. Two cutting rods 73 are used to cut and recycle the plastic remaining at the outlet of the extrusion tube 3, thereby reducing the impact on subsequent discharge and facilitating the recycling of the plastic material remaining in the extrusion tube 3.

[0039] Working principle: When the two blow molding molds 4 are opened, the operator places the preform into the grooves of the two blow molding molds 4. Then, the operator presses the start switch, causing the extrusion tube 3 to extrude plastic material exceeding the length of the blow molding mold 4. Simultaneously, the material is fitted onto the blow molding rod 61. Then, the clamping hydraulic rods 52 on the two support plates 2 push the mold base 51, allowing the mold base 51 to move on the moving rail 56 under the support of the moving seat 55. The limiting rod 54 on the mold base 51 and the limiting rod 57 on the moving seat 55 ensure that the mold base 51 can drive the blow molding molds 4 to close precisely together. The two blow molding molds 4 clamp the blow molding rod 61, and the blow molding rod 61 blows the plastic in the two blow molding molds 4. The bulging plastic material fixes the preform in the blow molding mold 4 together. After cooling, the mold base 51 moves the two blow molding molds 4 away from each other. The hydraulic lifting rod 63 drives the lifting seat 62 to descend, allowing the lifting seat 62 to drive the blow molding rod 61 to descend. Finally, the operator removes the molded part. The blow-molded part is removed from the blow molding rod 61. Simultaneously, servo motor 2 drives gear 78 to rotate. Gear 78 drives rack 77 to move on support rod 76. Rack 77 drives support rod 72. Support rod 72 drives two cutting rods 73 to be positioned below extrusion tube 3. Then, servo motor 1 drives bidirectional threaded rod 74 to rotate. Bidirectional threaded rod 74 drives two moving blocks 75 to move closer together. The two moving blocks 75 drive the cutting rods 73 to move closer together. The cutting rods 73 cut off the remaining plastic material in extrusion tube 3. The remaining plastic material falls directly into receiving frame 8. Then, servo motor 2 drives gear 78, which drives rack 77. Rack 77 drives support rod 72 to move above collection frame 71. Servo motor 3 drives receiving baffle 9 to rotate, opening receiving baffle 9 on receiving frame 8. Excess plastic material falls directly into collection frame 71. Finally, the operator continues to put preforms into blow mold 4 and repeats the above molding process.

Claims

1. A preform blow molding device, comprising a blow molding base (1), characterized in that: The blow molding base (1) is fixed with support plates (2) at both ends. An extrusion tube (3) is provided between the two support plates (2). The extrusion tube (3) is fixedly connected to one of the support plates (2). Two symmetrical blow molding molds (4) are provided between the two support plates (2). A mold closing assembly (5) is provided between the two blow molding molds (4) and the blow molding base (1). A lifting blow molding assembly (6) is provided between the two blow molding molds (4). A waste collection assembly (7) is provided on one side of the blow molding base (1).

2. The preform blow molding device according to claim 1, characterized in that: The lifting blown film assembly (6) includes a blown rod (61) disposed between two blown molds (4). A lifting seat (62) is fixed at the bottom of the blown rod (61). A hydraulic lifting rod (63) is disposed between the lifting seat (62) and the blown base (1). The bottom of the hydraulic lifting rod (63) is fixedly connected to the blown base (1). The lifting end of the hydraulic lifting rod (63) is fixedly connected to the lifting seat (62). The two blown molds (4) are provided with rod grooves (64) corresponding to the blown rod (61).

3. The preform blow molding apparatus according to claim 1, characterized in that: The mold clamping assembly (5) includes two mold seats (51) symmetrically arranged between two support plates (2). The two blow molds (4) are fixedly connected to the corresponding mold seats (51). Each of the two support plates (2) is fixed with a mold clamping hydraulic rod (52). The telescopic end of the mold clamping hydraulic rod (52) is fixedly connected to the corresponding mold seat (51). Each of the two mold seats (51) is fixed with a limit block (53). A limit rod (54) is fixed between the two support plates (2). The limit rod (54) passes through the two limit blocks (53) and is slidably connected to the limit blocks (53).

4. The preform blow molding device according to claim 3, characterized in that: Both mold bases (51) have a movable base (55) fixed at the bottom. The movable base (55) has two symmetrical movable rails (56) slidably connected at the bottom. The movable rails (56) are fixedly connected to the blow molding base (1).

5. A preform blow molding apparatus according to claim 4, characterized in that: Two symmetrical limiting rods (57) are fixed between the two support plates (2). The limiting rods (57) pass through the two movable seats (55) and are slidably connected to the movable seats (55).

6. The preform blow molding apparatus according to claim 1, characterized in that: The waste collection assembly (7) includes a collection frame (71) fixed on one side of the blow molding base (1). A support rod (72) is fixed above the collection frame (71). Two symmetrical moving blocks (75) are slidably connected on the support rod (72). A cutting rod (73) is fixed on the moving block (75). A bidirectional threaded rod (74) is rotatably connected on the support rod (72). The bidirectional threaded rod (74) is threadedly connected to the two moving blocks (75). A servo motor is fixed at one end of the support rod (72). The output end of the servo motor passes through the support rod (72) and is fixedly connected to the bidirectional threaded rod (74).

7. A preform blow molding apparatus according to claim 6, characterized in that: A rack (77) is fixed on the first support rod (72), and a second support rod (76) is slidably connected to the rack (77). The second support rod (76) is fixedly connected to the collection frame (71). A gear (78) is rotatably connected to the second support rod (76), and the gear (78) meshes with the rack (77). A second servo motor is fixed on the second support rod (76), and the output end of the second servo motor passes through the second support rod (76) and is fixedly connected to the gear (78).

8. A preform blow molding apparatus according to claim 7, characterized in that: The rack (77) has a receiving frame (8) fixed at the bottom. The receiving frame (8) corresponds to the two cutting rods (73). The receiving frame (8) is rotatably connected to a receiving baffle (9) at the bottom. A servo motor three is fixed on the receiving frame (8). The output end of the servo motor three passes through the receiving frame (8) and is fixedly connected to the rotating edge of the receiving baffle (9).

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