A blow molding machine for efficient leak detection sorting

Abstract

The utility model discloses a kind of blow molding machines of high-efficiency leak detection sorting, including rack and the plastic shaping mould, leak detection mechanism, sorting mechanism, main control module being set on rack, rack is provided with leak detection station and sorting station being arranged along processing direction, the leak detection mechanism, sorting mechanism correspondingly set in leak detection station, sorting station;Main control module controls plastic shaping mould to shift to leak detection station, and make leak detection mechanism to the plastic bottle blank reaching leak detection station carry out blow leak detection;When leak detection is qualified, main control module controls sorting mechanism to extend sorting hopper to collect qualified product, otherwise, control sorting hopper retreats and lets waste product naturally drop to corresponding collection position along blanking path. Therefore, greatly simplify sorting mechanism, so that the whole machine layout is more compact, reduce manufacturing and transportation cost, improve market competitiveness;And simplify sorting control logic, improve product processing efficiency, save energy cost.

Description

Technical Field

[0001] This utility model relates to the field of blow molding equipment technology, and in particular to a blow molding machine with high efficiency in leak detection and sorting. Background Technology

[0002] Blow molding machines are key industrial equipment for producing hollow plastic products. They are widely used in daily chemicals, food and beverage, packaging, automotive, and medical fields by blowing molten plastic preforms into shapes. The blow molding process typically includes several steps: preform pretreatment, stretch blow molding, cooling and shaping, and demolding. After stretch blow molding, the preform is usually trimmed to remove excess material.

[0003] After the preforms are cut from excess material, they still need to undergo leak testing and sorting. For example, Chinese utility model patent CN209580451U, entitled "A Blow Molding Machine with Sorting Function," includes a shell, a molding mold, a molding completion sensing device, a separation device, and a leak detection device located within the shell. The separation device includes vertically arranged stepper motors, a collection bucket, a cooling cylinder, a mounting platform, and a connecting rod. When the leak detection device detects that the preform's airtightness is unqualified and a leak occurs, the controller detects the signal change and determines that the product in the molding mold is unqualified. Then, it controls the stepper motor in the separation and cooling device to operate, driving the collection bucket to rotate below the molding mold. Finally, it controls the molding mold to separate, allowing the molded preform to fall into the collection bucket, completing the removal of defective products. If the leak detection device detects that the preform's airtightness is qualified, the controller will not control the stepper motor to operate but will directly control the opening of the molding mold, allowing qualified products to fall into the cooling cylinder for cooling and shaping.

[0004] However, the existing technology still has the following drawbacks:

[0005] 1. Existing blow molding equipment can separate qualified and unqualified products after leak testing. However, this separation device requires a stepper motor, a mounting platform, and a collection bucket and cooling cylinder horizontally mounted on the platform via connecting rods. The overall structure of the separation device is complex and bulky, resulting in an insufficiently compact installation between the separation device and the main machine. This increases the manufacturing and transportation costs of the blow molding equipment, hindering market promotion. Furthermore, when separating qualified or unqualified products, the separation device requires the stepper motor to control the repeated rotation and position switching of the collection bucket and cooling cylinder, which increases the overall energy consumption of the machine and affects product processing efficiency. In addition, the precise alignment of the collection bucket and cooling cylinder with the discharge port of the plastic mold is required when switching between them, which places high control requirements on the machine.

[0006] 2. The existing blow molding equipment lacks coordination between the molding die and the air leakage detection device. For example, molding and air leakage detection are both performed at the same station, and the blow molding and air leakage detection processes cannot be carried out synchronously, resulting in low product production efficiency. Utility Model Content

[0007] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a blow molding machine with high efficiency for leak detection and sorting.

[0008] The purpose of this utility model is achieved by the following technical solution: a high-efficiency blow molding machine for leak detection and sorting, including a frame and a molding die, a leak detection mechanism, a sorting mechanism, and a main control module arranged on the frame. The frame is provided with a leak detection station and a sorting station arranged along the processing direction, and the leak detection mechanism and the sorting mechanism are correspondingly arranged at the leak detection station and the sorting station.

[0009] The main control module sends corresponding instructions to control the molding die to slide to the leak testing station, and to enable the leak testing mechanism to blow air to test the plastic preform that has arrived at the leak testing station.

[0010] The sorting mechanism has a sorting hopper. When the leak test is qualified, the main control module sends an instruction to control the sorting mechanism to extend the sorting hopper to collect qualified products. Otherwise, it controls the sorting hopper to retreat to avoid the material falling path, allowing the waste products to fall naturally to the corresponding collection position.

[0011] Furthermore, the sorting station is located below the leak detection station, the sorting mechanism has a sorting cylinder, the output end of the sorting cylinder is fixedly connected to the sorting hopper, and the main control module is electrically connected to the sorting cylinder to control the start of the sorting cylinder and drive the sorting hopper to extend horizontally to collect the qualified products falling downwards.

[0012] Furthermore, the frame is also provided with a blow molding station, which is located before the leak testing station, and the blow molding station of the frame is provided with a pen insertion mechanism.

[0013] The molding die is connected to a clamping mechanism. When the molding die and the clamping mechanism slide along the processing direction to the corresponding blow molding station and leak testing station, the main control module sends corresponding instructions to control the pen insertion mechanism and the leak testing mechanism to perform blow molding and air blowing leak testing on the plastic preform synchronously and respectively.

[0014] Furthermore, the clamping mechanism includes a connecting plate, a clamping cylinder, and clamping blocks. The two connecting plates are arranged parallel to each other on the molding die. The clamping blocks are respectively arranged on opposite sides of the two connecting plates. The clamping blocks are provided with clamping grooves adapted to the shape of the plastic preform body on opposite sides. The clamping cylinder is arranged on the outer side of the two connecting plates, and the output end of the clamping cylinder is connected to the clamping block. The main control module is electrically connected to the clamping cylinder and is used to control the clamping cylinder to start and drive the two clamping blocks to move towards each other and clamp the plastic preform.

[0015] Furthermore, a feeding mechanism is provided below the sorting mechanism. The feeding mechanism has a horizontal support plate, a guide plate, and a feeding cylinder. The two horizontal support plates are respectively arranged at the bottom of the clamping block. The guide plate, which gradually narrows inward, is provided below the two horizontal support plates. The output end of the feeding cylinder is connected to the horizontal support plate and the guide plate. The control module is electrically connected to the feeding cylinder and is used to control the feeding cylinder to start and drive the two horizontal support plates and the guide plate to move outward to separate and release qualified products.

[0016] Furthermore, the frame is also equipped with an X-axis sliding assembly, which has an X-axis slide rail and an X-axis cylinder. The blow molding station, leak testing station, and sorting station are arranged along the X-axis slide rail. The molding die is connected to the output end of the X-axis cylinder and is movably mounted on the X-axis slide rail. The main control module is electrically connected to the X-axis cylinder and is used to control the X-axis cylinder to start and drive the molding die to slide along the X-axis slide rail to the blow molding station, leak testing station, and sorting station.

[0017] Furthermore, the frame is also provided with a Y-axis sliding assembly, which has a Y-axis slide block, a Y-axis slide rail and a Y-axis cylinder. The Y-axis slide rail is movably mounted on the X-axis slide rail through the Y-axis slide block, and the output end of the X-axis cylinder is connected to the Y-axis slide block.

[0018] The molding die has two split molding templates and a molding core. The molding core is located on the opposite side of the two molding templates. The molding template is connected to the output end of the Y-axis cylinder and is movably mounted on the Y-axis slide rail. The main control module is electrically connected to the Y-axis cylinder and is used to control the Y-axis cylinder to start and drive the molding template to slide along the Y-axis slide rail. It also drives the two molding cores to close together to form a molding cavity for molding plastic bottle preforms.

[0019] Furthermore, the frame is also provided with an extrusion station, which is located before the blow molding station. The extrusion station is provided with an extrusion mechanism, which has an extrusion screw for conveying raw materials. The feed end of the extrusion screw is provided with a raw material bin, and the discharge end is located towards the extrusion station and corresponds to the molding die that slides to the extrusion station, for extruding filler into the molding die.

[0020] Furthermore, the pen insertion mechanism has a pen insertion cylinder and several blow molding pens. The output end of the pen insertion cylinder is connected to the upper end of the blow molding pens. The main control module is electrically connected to the pen insertion cylinder and is used to control the pen insertion cylinder to start and drive the blow molding pens to move downward to blow mold the plastic preform.

[0021] Furthermore, the leak detection mechanism has a leak detection cylinder and several leak detection heads. The output end of the leak detection cylinder is connected to the upper end of the leak detection head. The main control module is electrically connected to the leak detection cylinder and is used to control the leak detection cylinder to start and drive the leak detection head to move downward to blow air to detect leaks in the plastic bottle preform.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] (1) The embodiments of this application optimize the design of the workstations on the frame, and arrange the molding mold, leak detection mechanism, and sorting mechanism in a reasonable manner for each linear workstation. The sorting mechanism eliminates the complex structure of the stepper motor and the rotating collection bucket, greatly simplifying the sorting mechanism, making the overall layout more compact, reducing manufacturing and transportation costs, and improving market competitiveness. In addition, under the control of automated instructions, the sorting hopper can be controlled to make simple free linear motion to complete the sorting and collection of qualified products and waste products, simplifying the sorting control logic, eliminating the need to wait for mechanical switching, eliminating the need for precise positioning, improving product processing efficiency, and the power consumption of the cylinder is only 10% of that of the stepper motor, saving energy costs.

[0024] (2) By reasonably setting the blow molding station, leak testing station and sorting station in the product processing direction of the frame, the blow molding and leak testing and / or sorting actions are triggered synchronously under the control command of the main control module, and are executed in parallel at different stations (such as when product A is leak tested and / or sorted, product B is blow molded at the same time). Compared with the previous implementation method of setting blow molding and leak testing at the same station, the two processing operations do not interfere with each other, which can greatly improve the product processing efficiency. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the shaping mold and clamping mechanism of the blow molding machine in a preferred embodiment of the present invention, when they slide to the extrusion station and the blow molding station respectively.

[0026] Figure 2This is a three-dimensional schematic diagram of the shaping mold and clamping mechanism of the blow molding machine in a preferred embodiment of the present invention, when they are correspondingly slid to the blow molding station and the leak testing station.

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a three-dimensional schematic diagram of the preferred embodiment of the present invention, showing the molding mold, the clamping mechanism mounted on the X-axis sliding assembly and the Y-axis sliding assembly, and their configuration relationship with the pen insertion mechanism;

[0029] Figure 5 This is another perspective view of the preferred embodiment of the present invention, showing the molding die and clamping mechanism mounted on the X-axis sliding assembly and the Y-axis sliding assembly;

[0030] Figure 6 This is a top view of the blow molding machine in a preferred embodiment of the present invention.

[0031] In the picture:

[0032] 10. Machine frame; 101. Extrusion station; 102. Blow molding station; 103. Leak testing station; 104. Sorting station;

[0033] 20. Molding mold; 201. Molding template; 202. Molding core; 2021. Molding cavity;

[0034] 30. Clamping mechanism; 301. Connecting plate; 302. Clamping cylinder; 303. Clamping block; 3031. Clamping groove;

[0035] 40. Pen insertion mechanism; 401. Pen insertion cylinder; 402. Blow-molded pen insertion; 403. Limiting plate; 4031. Horizontal limiting hole;

[0036] 50. Leak detection mechanism; 501. Leak detection cylinder; 502. Leak detection head;

[0037] 60. Sorting mechanism; 601. Sorting cylinder; 602. Sorting hopper; 603. Discharge hopper;

[0038] 70. Feeding mechanism; 701. Horizontal support plate; 702. Guide plate; 703. Feeding cylinder;

[0039] 80. X-axis sliding assembly; 801. X-axis slide rail; 802. X-axis cylinder; 803. X-axis mounting bracket;

[0040] 90. Y-axis sliding assembly; 901. Y-axis slide rail; 902. Y-axis cylinder; 903. Y-axis slide block;

[0041] 100. Extrusion mechanism;

[0042] 200. Raw material warehouse;

[0043] b. Plastic preform. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0045] like Figure 1-6 As shown, a high-efficiency leak-detecting and sorting blow molding machine is used to classify and sort plastic preforms (b) after they have been cut from overflow material. It is widely used in blow molding processes in the daily chemical, food and beverage, packaging, automotive, and medical industries. This high-efficiency leak-detecting and sorting blow molding machine includes a frame 10 and an extrusion mechanism 100, a molding die 20, a leak detection mechanism 50, a sorting mechanism 60, and a main control module (not shown) mounted on the frame 10. The frame 10 has an extrusion station 101, a blow molding station 102, a leak detection station 103, and a sorting station 104 arranged sequentially along the product processing direction. Specifically, the blow molding station 102, the leak detection station 103, and the sorting station 104 can be set to the left and right of the extrusion station 101 on the frame to improve the overall production efficiency.

[0046] like Figure 6 As shown, in this embodiment of the application, the product processing direction is preferably selected as X-axis, Y-axis and Z-axis. The extrusion station 101, blow molding station 102 and leak detection station 103 are arranged sequentially along the X-axis, the leak detection station 103 and the sorting station 104 are arranged along the Z-axis, and the sorting station 104 is located below the leak detection station 103. The opening and closing direction of the molding die 20 is the Y-axis.

[0047] The molding die 20 has two molding templates 201 and a molding core 202 that are set apart. The molding core 202 is set on the opposite side of the two molding templates 201, and the two molding cores 202, when closed together, form a molding cavity 2021 for molding plastic preform b.

[0048] The extrusion mechanism 100 is installed on the extrusion station 101. The extrusion mechanism 100 has an extrusion screw (not shown in the figure). The extrusion screw passes through the heating cylinder. The feed end of the extrusion screw is provided with a raw material bin 200, and the discharge end extends toward the extrusion station 101. The raw material in the raw material bin 200 is conveyed and extruded through the extrusion screw. When the molding die 20 slides to the extrusion station 101, the extrusion screw extrudes molten raw material and fills the molding cavity 2021 of the molding die 20.

[0049] The leak detection mechanism 50 and the sorting mechanism 60 are respectively installed at the leak detection station 103 and the sorting station 104 on the frame 10. The main control module (such as a PLC) is connected to the drive unit of the molding die 20, the leak detection mechanism 50, and the sorting mechanism 60 through a circuit. Therefore, by sending corresponding instructions through the main control module, the molding die 20 can be controlled to slide back and forth between the leak detection station 103 and the sorting station 104. For example, when the molding die 20 slides to the leak detection station 103 along the product processing direction, the leak detection mechanism 50 receives the instruction from the main control module to blow-molded plastic preforms on the molding die 20 to detect leaks.

[0050] Products that pass the leak test by the leak detection agency 50 are deemed to be qualified products, while those that have leaks are deemed to be defective products. Then, the qualified and defective products are sorted and screened by the sorting agency 60.

[0051] Specifically, the sorting mechanism 60 has a sorting cylinder 601 and a sorting hopper 602. The sorting cylinder 601 is horizontally mounted on the frame 10. The output end of the sorting cylinder 601 is fixedly connected to the sorting hopper 602. The sorting hopper 602 has a feed inlet with an opening at the top and a discharge outlet with an opening at the side.

[0052] The sorting cylinder 601 is electrically connected to the main control module. The main control module sends a corresponding instruction to the sorting cylinder 601 based on the corresponding leak detection signal (qualified / unqualified) fed back by the leak detection mechanism 50, so that the sorting cylinder 601 starts and drives the sorting hopper 602 to extend or retract in the horizontal direction.

[0053] For example, when the leak test is passed, the main control module sends a command to control the sorting mechanism 60 to extend the sorting hopper 602 to receive the qualified products falling downwards (the sorting hopper 602 is located directly below the leak testing mechanism 50 when extended). The qualified products enter the sorting hopper 602 through the feed inlet, and then exit from the discharge outlet and fall into the designated qualified product collection box. When the leak test fails, the main control module sends a command to control the sorting mechanism 60 to maintain the retracted state or the initial state of the sorting hopper 602 (avoiding the falling path of the unqualified products), allowing the waste products to fall naturally into the corresponding waste bin.

[0054] Thus, this embodiment of the application optimizes the design of the workstations on the frame 10, and rationally arranges the molding mold 20, leak detection mechanism 50, and sorting mechanism 60 for each linear workstation. The sorting mechanism 60 eliminates the complex structure of the stepper motor and rotating collection bucket, greatly simplifying the sorting mechanism 60, making the overall layout more compact, reducing manufacturing and transportation costs, and improving market competitiveness. In addition, under the control of automated commands, the sorting hopper 602 can be controlled to perform simple linear motion with simple degrees of freedom to complete the sorting and collection of qualified products and waste products, simplifying the sorting control logic, eliminating the need to wait for mechanical switching and precise positioning, improving product processing efficiency, and the power consumption of the cylinder is only 10% of that of the stepper motor, saving energy costs.

[0055] A pen insertion mechanism 40 is provided on the blow molding station 102 of the frame 10. The pen insertion mechanism 40 has a pen insertion cylinder 401 and two blow molding pens 402. The pen insertion cylinder 401 is vertically mounted on the frame 10, and its output end points vertically downward and connected to the upper ends of the blow molding pens 402. The two blow molding pens 402 are arranged parallel to each other. The lower ends of the blow molding pens 402 are used to insert and blow mold the plastic preform b. The two blow molding pens 402 can perform pen insertion actions simultaneously or independently. When performing pen insertion actions independently, each can be equipped with a corresponding pen insertion cylinder 401. The pen insertion cylinder 401 is electrically connected to the main control module. When the molding die 20 arrives at the blow molding station 102, the main control module sends a command to control the pen insertion cylinder 401 to start, driving the blow molding pens 402 to move downward to blow mold the plastic preform b.

[0056] A clamping mechanism 30 is fixedly connected to one side of the molding die 20. The clamping mechanism 30 slides synchronously with the molding die 20 along the processing direction. The clamping mechanism 30 has a connecting plate 301, a clamping cylinder 302, and a clamping block 303. The two connecting plates 301 are arranged in parallel, and one end of the two connecting plates 301 is fixedly connected to the molding die 20 and moves closer and further apart with the mold closing and opening actions of the molding die 20. Clamping blocks 303 are respectively provided on opposite sides of the two connecting plates 301. Clamping grooves 3031 adapted to the shape of the plastic preform b are provided on opposite sides of the two clamping blocks 303. For example, the clamping grooves 3031 are designed as grooves with a semi-circular cross-section.

[0057] The clamping cylinders 302 are arranged on the outer sides of the two connecting plates 301, and the output end of the clamping cylinders 302 can pass through the connecting plates 301 and be connected to the clamping blocks 303. The clamping cylinders 302 are electrically connected to the main control module. The main control module sends a command to control the clamping cylinders 302 to start and drive the two clamping blocks 303 to move towards each other. The plastic preform b is clamped by the clamping grooves 3031 of the two clamping blocks 303 closing towards each other to complete the blow molding process.

[0058] For example, when the main control module sends a command to control the molding die 20 to slide along the processing direction to the blow molding station 102, since the clamping mechanism 30 is located on the side of the molding die 20 facing the product processing progress, the clamping mechanism 30 is located on the leak detection station 103 at this time. Figure 2 As shown. The molding die 20 has a plastic preform to be blow-molded. The main control module controls the pen insertion mechanism 40 to press down for blow molding. If the clamping block 303 of the clamping mechanism 30 is holding a plastic preform b that has been blow-molded, the main control module sends a command to control the leak detection mechanism 50 to start the leak detection work synchronously.

[0059] In addition, a limiting plate 403 is provided below the inserting mechanism 40. The limiting plate 403 has a horizontal limiting hole 4031. The size of the horizontal limiting hole 4031 is smaller than the size of the plastic preform b and can only allow the bottle mouth part of the plastic preform b to pass through. During the blow molding process, the blow molding insert 402 passes through the horizontal limiting hole 4031 and blow molds the plastic preform. The blow-molded plastic preform b is then adsorbed and lifted to the height of the horizontal limiting plate 403. When the clamping mechanism 30 slides to the blow molding station 102 with the molding die 20, the blow molding insert 402 places the blow-molded plastic preform b onto the clamping mechanism 30. When the clamping mechanism 30 clamps the plastic preform b and slides to the leak detection station 103, the leak detection mechanism 50 can blow air to detect leaks in the plastic preform b on the clamping mechanism 30.

[0060] Therefore, by rationally setting the blow molding station 102, leak testing station 103, and sorting station 104 in the product processing direction of the frame 10, the blow molding and leak testing actions and / or sorting actions are triggered synchronously under the control instructions of the main control module, and are executed in parallel at different stations (such as when product A is being leak tested and / or sorted, product B is being blow molded at the same time). Compared with the previous implementation method where blow molding and leak testing are set at the same station, the two processing operations do not interfere with each other, which can greatly improve product processing efficiency.

[0061] Regarding the leak detection of the plastic preform b, specifically, the leak detection mechanism 50 has a leak detection cylinder 501 and two leak detection heads 502. The leak detection cylinder 501 is vertically mounted on the frame 10, and its output end is connected to the upper end of the leak detection head 502. The number of leak detection heads 502 only needs to correspond to the number of blow molding inserts 402 in the previous station. The leak detection cylinder 501 is electrically connected to the main control module. The main control module sends a command to control the leak detection cylinder 501 to start and drive the leak detection head 502 to move downward, inflating the plastic preform b that has completed blow molding on the clamping mechanism 30 and maintaining it for a certain period of time to blow air into the plastic preform b to detect leaks and determine whether there is an air leakage problem in the plastic preform.

[0062] Regarding the design for unloading qualified products, an unloading mechanism 70 is provided below the sorting mechanism 60. This unloading mechanism 70 includes a horizontal support plate 701, a guide plate 702, and an unloading cylinder 703. Two horizontal support plates 701 are respectively arranged at the bottom of the clamping block 303. A connecting block is provided below the two horizontal support plates 701, and the connecting block is used to fix the unloading cylinder 703 and the guide plate 702. The unloading cylinder 703 is horizontally installed, and its output end is fixedly connected to the connecting block. One side of each guide plate 702 is connected to the bottom of the connecting block, while the other side gradually narrows towards each other.

[0063] After the leak detection is completed, the main control module sends a command to start the feeding cylinder 703, driving the two horizontal support plates 701 and the guide plate 702 to move outward and separate, allowing the qualified products to slide down along the guide plate 702 and fall into the sorting hopper 602. In addition, a drop hopper 603 is also provided below the discharge port of the sorting hopper 602. This drop hopper 603 is used to receive the qualified products sliding down from the sorting hopper 602 and sort the qualified products into the corresponding qualified product collection box.

[0064] Therefore, by setting a feeding mechanism 70 below the sorting mechanism 60, even if the two clamping blocks 303 of the clamping mechanism 30 release the qualified product before the feeding cylinder 703 receives any leak test qualified signal, the two horizontal support plates 701 will always support the qualified product together, thereby solving the problem that the qualified product will fall directly downwards and cause product damage after the clamping blocks 303 release the qualified product.

[0065] Further description of the product processing direction control: The frame 10 is also equipped with an X-axis sliding assembly 80 and a Y-axis sliding assembly 90. The X-axis sliding assembly 80 includes an X-axis slide rail 801 and an X-axis cylinder 802, while the Y-axis sliding assembly 90 includes a Y-axis slide block 903, a Y-axis slide rail 901, and a Y-axis cylinder 902. The X-axis slide rail 801 is mounted on the frame 10 via an X-axis mounting bracket 803. The extrusion station 101, blow molding station 102, leak testing station 103, and sorting station 104 are arranged sequentially along the X-axis slide rail 801. The Y-axis slide block 903 is connected to the X-axis slide rail 801 via a slider, and the Y-axis slide rail 901 is mounted on the Y-axis slide block 903. Two forming templates 201 are mounted on the Y-axis slide rail 901 via sliders.

[0066] Both the X-axis cylinder 802 and the Y-axis cylinder 902 are electrically connected to the main control module. The piston rod of the X-axis cylinder 802 is connected to the Y-axis slide block 903, and the piston rod of the Y-axis cylinder 902 is connected to the side wall of the template. Therefore, under the control of the main control module, the X-axis cylinder 802 is activated to drive the Y-axis slide block 903 to slide along the X-axis slide rail 801, thereby controlling the molding die 20 to slide to the extrusion station 101 and the blow molding station 102, and the clamping mechanism 30 to slide to the leak detection station 103 and the sorting station 104. The Y-axis cylinder 902 is activated to drive the molding template 201 to slide along the Y-axis slide rail 901, and to drive the two molding cores 202 to close in opposite directions to form the molding cavity 2021 to extrude and mold the filled molten material.

[0067] Therefore, by setting X-axis sliding components 80 and Y-axis sliding components 90 on the frame 10 for each station, each processing action relies only on linear motion, eliminating the need for angle calibration, reducing the daily production failure rate, realizing XYZ multi-degree-of-freedom sliding and precise station switching, achieving continuous production of four stations (extrusion → blow molding → leak detection → sorting), reducing transit time, achieving a high degree of automation, and significantly improving production and processing efficiency.

[0068] The working process of the blow molding machine provided in this embodiment is as follows:

[0069] 1. Raw material extrusion:

[0070] The molding die 20 slides to the extrusion station 101, and the extrusion mechanism 100 injects molten raw material into the molding cavity 2021.

[0071] 2. Blow molding and air-blowing leak testing:

[0072] The molding die 20 slides to the blow molding station 102, the pen inserting mechanism 40 presses down to blow mold the plastic preform b, and at the same time adsorbs the blow molded plastic preform b and lifts it to the limit height. After the clamping mechanism 30 moves to the blow molding station 102, the plastic preform is placed on the clamping mechanism 30.

[0073] Synchronous operation: While the pen insertion mechanism 40 is pressing down to blow air and form the plastic preform, the leak detection mechanism 50 is pressing down to perform air inflation detection on the plastic preform b that has been blow-molded on the leak detection station 103. The leak detection results are transmitted to the main control module in real time.

[0074] 3. Product sorting:

[0075] If the leak test is qualified: the main control module triggers the sorting cylinder 601 to extend the sorting hopper 602 to receive the material, and then guides it to the qualified product collection box through the feeding mechanism 70;

[0076] If the leak test fails: the sorting hopper 602 retracts or remains in its initial state, and the defective products fall directly into the waste bin.

[0077] In actual production and processing, since the processing actions between the clamping mechanism and the sorting mechanism can communicate and coordinate with each other, the product sorting work can be carried out simultaneously with the blow molding work in step 2, and the processing of the two stations does not interfere with each other.

[0078] 4. Execute in a loop:

[0079] While the plastic preform b at the sorting station 104 is being sorted, the blow molding process of the next plastic preform b has already begun at the blow molding station 102, and the extrusion mechanism 100 at the extrusion station 101 has also begun to extrude molten raw materials, thus realizing parallel production at three stations.

[0080] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A high-efficiency leak detection and sorting blow molding machine, characterized in that, The system includes a frame and a molding die, a leak detection mechanism, a sorting mechanism, and a main control module mounted on the frame. The frame is provided with a leak detection station and a sorting station arranged along the processing direction, and the leak detection mechanism and the sorting mechanism are correspondingly mounted on the leak detection station and the sorting station. The main control module sends corresponding instructions to control the molding die to slide to the leak testing station, and to enable the leak testing mechanism to blow air to test the plastic preform that has arrived at the leak testing station. The sorting mechanism has a sorting hopper. When the leak test is qualified, the main control module sends an instruction to control the sorting mechanism to extend the sorting hopper to collect qualified products. Otherwise, it controls the sorting hopper to retreat to avoid the material falling path, allowing the waste products to fall naturally to the corresponding collection position.

2. The high-efficiency leak detection and sorting blow molding machine as described in claim 1, characterized in that, The sorting station is located below the leak detection station. The sorting mechanism has a sorting cylinder. The output end of the sorting cylinder is fixedly connected to the sorting hopper. The main control module is electrically connected to the sorting cylinder and is used to control the start of the sorting cylinder and drive the sorting hopper to extend horizontally to collect the qualified products falling downwards.

3. The high-efficiency leak detection and sorting blow molding machine as described in claim 1, characterized in that, The frame is also equipped with a blow molding station, which is located before the leak testing station. The blow molding station of the frame is equipped with a pen insertion mechanism. The molding die is connected to a clamping mechanism. When the molding die and the clamping mechanism slide along the processing direction to the corresponding blow molding station and leak testing station, the main control module sends corresponding instructions to control the pen insertion mechanism and the leak testing mechanism to perform blow molding and air blowing leak testing on the plastic preform synchronously and respectively.

4. The high-efficiency leak detection and sorting blow molding machine as described in claim 3, characterized in that, The clamping mechanism includes a connecting plate, a clamping cylinder, and clamping blocks. Two connecting plates are mounted on the molding die and arranged in parallel. Clamping blocks are respectively mounted on opposite sides of the two connecting plates. Clamping grooves adapted to the shape of the plastic preform are mounted on opposite sides of the two clamping blocks. The clamping cylinder is mounted on the outer side of the two connecting plates, and the output end of the clamping cylinder is connected to the clamping block. The main control module is electrically connected to the clamping cylinder and is used to control the clamping cylinder to start and drive the two clamping blocks to move towards each other and clamp the plastic preform.

5. The high-efficiency leak detection and sorting blow molding machine as described in claim 4, characterized in that, Below the sorting mechanism is a feeding mechanism, which includes a horizontal support plate, a guide plate, and a feeding cylinder. Two horizontal support plates are respectively arranged at the bottom of the clamping block. Below the two horizontal support plates is a guide plate that gradually narrows inward. The output end of the feeding cylinder is connected to the horizontal support plate and the guide plate. The control module is electrically connected to the feeding cylinder and is used to control the feeding cylinder to start and drive the two horizontal support plates and the guide plate to move outward to separate and release qualified products.

6. The high-efficiency leak detection and sorting blow molding machine as described in claim 3, characterized in that, The frame is also equipped with an X-axis sliding assembly, which has an X-axis slide rail and an X-axis cylinder. The blow molding station, leak testing station, and sorting station are arranged along the X-axis slide rail. The molding die is connected to the output end of the X-axis cylinder and is movably mounted on the X-axis slide rail. The main control module is electrically connected to the X-axis cylinder and is used to control the X-axis cylinder to start and drive the molding die to slide along the X-axis slide rail to the blow molding station, leak testing station, and sorting station.

7. The high-efficiency leak detection and sorting blow molding machine as described in claim 6, characterized in that, The frame is also equipped with a Y-axis sliding assembly, which includes a Y-axis slide block, a Y-axis slide rail, and a Y-axis cylinder. The Y-axis slide rail is movably mounted on the X-axis slide rail via the Y-axis slide block, and the output end of the X-axis cylinder is connected to the Y-axis slide block. The molding die has two split molding templates and a molding core. The molding core is located on the opposite side of the two molding templates. The molding template is connected to the output end of the Y-axis cylinder and is movably mounted on the Y-axis slide rail. The main control module is electrically connected to the Y-axis cylinder and is used to control the Y-axis cylinder to start and drive the molding template to slide along the Y-axis slide rail. It also drives the two molding cores to close together to form a molding cavity for molding plastic bottle preforms.

8. The high-efficiency leak detection and sorting blow molding machine as described in any one of claims 3-7, characterized in that, The frame is also provided with an extrusion station, which is located before the blow molding station. The extrusion station is provided with an extrusion mechanism, which has an extrusion screw for conveying raw materials. The feed end of the extrusion screw is provided with a raw material bin, and the discharge end is located towards the extrusion station and corresponds to the molding die that slides to the extrusion station, for extruding filler into the molding die.

9. The high-efficiency leak detection and sorting blow molding machine as described in any one of claims 3-7, characterized in that, The pen insertion mechanism has a pen insertion cylinder and several blow molding pens. The output end of the pen insertion cylinder is connected to the upper end of the blow molding pens. The main control module is electrically connected to the pen insertion cylinder and is used to control the pen insertion cylinder to start and drive the blow molding pens to move downward to blow mold the plastic preform.

10. The high-efficiency leak detection and sorting blow molding machine as described in any one of claims 1-7, characterized in that, The leak detection mechanism has a leak detection cylinder and several leak detection heads. The output end of the leak detection cylinder is connected to the upper end of the leak detection head. The main control module is electrically connected to the leak detection cylinder and is used to control the leak detection cylinder to start and drive the leak detection head to move downward to blow air to detect leaks in the plastic bottle preform.

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