A waterproof testing device for a waterproofed upper of a shoe and a method of use

Abstract

This invention relates to the field of waterproof testing technology, specifically to a waterproof testing device and method for uppered waterproof shoes. The device includes a testing box containing a shoe rack for holding the uppered waterproof shoes to be tested. This device and method utilizes a high-position spring plate for suspension support, combined with the principle of determining whether the shoe slides down due to its own weight after water ingress. Under normal conditions, the spring plate is higher than the inclined plane, and the shoe is stable. After water ingress, the corresponding spring plate sinks and slides down the inclined plane in a directional manner. By differentiating the pressure states of the independent front and rear spring plates, three defect conditions can be accurately distinguished: toe leakage, heel leakage, and overall upper leakage. This completely solves the industry problems of wasteful testing materials, low testing efficiency, and inability to locate leaks in traditional testing methods. It is specifically adapted to the waterproof testing scenarios of seams and joints in uppered waterproof shoes, significantly improving testing accuracy and practicality.

Description

Technical Field

[0001] This invention relates to the field of waterproof testing technology, specifically to a waterproof testing device and method for a waterproof shoe upper. Background Technology

[0002] Lace-up waterproof shoes are commonly used waterproof footwear for outdoor work and labor protection. These shoes are formed using a lace-up process, and the upper area has a large number of needle holes, lace-up seams, and gaps between the upper and the sole. These areas are the weakest points in the entire shoe that are most prone to water seepage and leakage. Therefore, the waterproof performance of the upper is the core indicator for the factory testing of lace-up waterproof shoes.

[0003] Currently, the industry standard for waterproof testing of suede shoes generally employs a traditional open-style immersion method combined with absorbent paper testing. During the test, staff place absorbent paper inside the shoe beforehand, then immerse the shoe entirely or partially in water. After a period of immersion, the shoe is removed, and the extent and degree of dampness on the absorbent paper are observed to determine if the shoe is leaking. This testing method requires a continuous supply of absorbent paper, resulting in high material costs over long-term testing. Furthermore, the testing process is cumbersome and inefficient. More importantly, this method can only roughly determine if the shoe has water inside; it cannot accurately distinguish whether the leak is located at the toe, heel, or the entire upper, leading to poor targeting and hindering subsequent product defect rectification and process optimization.

[0004] Meanwhile, existing conventional testing equipment lacks a dedicated water-enclosing structure for shoe uppers and mostly adopts open-type immersion testing. The immersion range cannot be precisely controlled, and it is impossible to conduct targeted immersion testing on key weak areas such as upper seams and upper-sole bonding seams. This can easily lead to situations where local immersion is inadequate or water flows turbulently, resulting in poor testing stability and low testing accuracy.

[0005] In addition, existing testing procedures lack automated shoe opening protection structures. During testing, water can easily splash into the shoe cavity, causing false water ingress test results. To avoid this problem, the industry commonly uses manual stuffing of sponges, cloth, etc., to seal the shoe opening. Manual sealing relies entirely on the operator's experience, and the tightness and position of the seal cannot be standardized, easily leading to problems such as stuffing misalignment, falling off, and incomplete sealing. This can easily cause distorted test data, and the manual operation is labor-intensive and inefficient, failing to meet the production needs of standardized batch testing in factories. Summary of the Invention

[0006] The purpose of this invention is to provide a waterproof testing device and method for slingback waterproof shoe uppers, addressing the problems mentioned in the background art, such as reliance on absorbent paper consumables, high testing costs, low efficiency, inability to accurately locate leaks in the shoe upper, non-standard immersion testing conditions, poor stability, and large errors and false leaks caused by manual sealing of the shoe opening. To achieve the above objective, this invention provides the following technical solution: A waterproof testing device for slingback waterproof shoe uppers, comprising a testing box, inside which a shoe rack for placing the slingback waterproof shoe to be tested is fixedly installed. A fixed mold head is fixedly installed inside the testing box and located in front of the shoe rack. An air duct, a water injection pipe, an overflow pipe, and a drain pipe are respectively connected and fixed to the fixed mold head. Two immersion molds are symmetrically slidably installed inside the testing box. A lead screw driven by a drive motor is rotatably installed inside the testing box. The two ends of the lead screw have opposing threads. The two immersion molds are respectively matched and driven by the threads at both ends of the lead screw. Rotation of the lead screw drives the two immersion molds to close relative to each other, forming a water-retaining cavity with an open top. Both of the immersion molds have mating notches on their mating sides for fitting and sealing with the shoe rack and the fixed mold head.

[0007] The top surface of the shoe rack is set as an inclined platform, and two sets of sliding grooves are opened along the front and back direction on the top surface of the shoe rack. Each set of sliding grooves has a spring plate slidably installed in it. The sliding grooves are equipped with top springs, which are used to push the spring plates to slide vertically.

[0008] The two immersion molds have side mounting openings on their mating sides, within which elastic airbags are fixedly embedded. A flip-up frame is rotatably mounted on the top of each immersion mold. A flexible plug for sealing the shoe opening is fixed to the outer end of the flip-up frame, and an airtight plate is fixed to the inner end of the flip-up frame. A fan-shaped airtight groove is formed inside each immersion mold, and the airtight plate is slidably fitted within this groove. The fan-shaped airtight groove communicates with the inner cavity of the elastic airbag through a vent. Rubber inclined plates for limiting the toe area are fixed to the mating sides of each immersion mold.

[0009] Preferably, the fixed mold head and the two immersion molds are joined together to form a water storage cavity, and the water storage cavity is set at the position of the upper of the waterproof shoe to be tested.

[0010] Preferably, the overflow pipe is located at the upper part of the fixed mold head, the drain pipe is located at the lower part of the fixed mold head, and the air outlet of the air duct is oriented towards the area above the shoe rack.

[0011] Preferably, the fan-shaped airtight groove is an arc-shaped sealed groove structure, and the shape of the airtight plate matches the groove shape of the fan-shaped airtight groove. The airtight plate slides along the groove trajectory to realize the pitch and rotation of the tilting frame.

[0012] Preferably, the rubber inclined plate is an inclined elastic plate. After the two immersion molds are closed, the rubber inclined plates on both sides cooperate to form a limiting groove, which clamps and fixes the toe position of the waterproof shoe to be tested.

[0013] Preferably, the two sets of spring plates slide and are subjected to force independently. The front spring plate is positioned below the toe of the shoe, and the rear spring plate is positioned below the heel. The top spring normally pushes the top surface of the spring plate slightly higher than the inclined platform of the shoe rack, so that the waterproof shoe is normally supported only by the two sets of spring plates and does not contact the inclined platform. After the spring plate is compressed and sinks, it can slide and conform to the inclined platform.

[0014] Preferably, the drive motor is fixedly installed on the inner side wall of the test chamber, the output shaft of the drive motor is coaxially and fixedly connected to the end of the lead screw, and the two ends of the lead screw are rotatably engaged with the inner wall of the test chamber through bearings.

[0015] Preferably, the flexible plug is made of elastic silicone material, and the flexible plug has an overall conical structure with the small end of the cone facing the shoe opening. The outer diameter is larger than the inner diameter of the waterproof shoe opening, so as to achieve guiding and interference sealing.

[0016] A method for using a waterproof testing device for a waterproof upper in a shoe includes: S1. Place the waterproof shoes to be tested stably on the front and back spring plates of the shoe rack. The shoes are in a free and upright state, and at this time the shoes are suspended and supported without contacting the inclined surface of the shoe rack.

[0017] S2. The drive motor rotates forward, and the lead screw drives the two immersion molds on both sides to close synchronously. During the mold closing process, the rubber inclined plates on both sides cooperate to clamp and fix the shoe toe, completing the shoe body limit fixation and preventing displacement during the sealing process. At the same time, the immersion mold fits and seals with the shoe rack and fixed mold head through the interlocking notch, forming a sealed water storage cavity. During the closing process of the immersion mold, the elastic airbag on the side is squeezed. The elastic airbag is pressurized and generates air, which is sent into the fan-shaped airtight groove through the vent. The air pressure pushes the airtight plate to slide, causing the flipping frame to flip downward, so that the conical flexible plug is smoothly introduced and accurately inserted into the waterproof shoe opening, automatically completing the shoe opening sealing and preventing test water from splashing into the shoe cavity.

[0018] S3. Water is injected into the water storage cavity through the water injection pipe, and the overflow pipe controls the water level inside the cavity in real time to ensure that the water level completely covers the weak areas of the upper seam and the sole-to-upper seam of the waterproof shoe. The static pressure test is performed for a preset test time to complete the static waterproof immersion test of the shoe upper.

[0019] S4. After the test is completed, open the drain pipe to completely drain the water from the cavity. After drainage, blow clean air through the air duct to thoroughly clean the outer surface of the waterproof shoes, completely removing any water adhering to the outer surface of the shoes. Only retain the variable of increased weight due to water entering the shoes, and eliminate the interference of external water on the test results.

[0020] S5: controlling the driving motor to rotate reversely, driving the two water-immersed molds to separate and reset, the turning frame automatically rebounds and resets as air pressure is released, and the sealing of the shoe opening is released. The water leakage condition is automatically determined according to the placement state of the shoe: if the toe absorbs water and gains weight, it presses down the front elastic plate, making the front elastic plate sink below the inclined table of the shoe rack, the toe end sinks, the shoe tilts and slides forward, and it is determined that the toe upper has water leakage. If the heel absorbs water and gains weight, it presses down the rear elastic plate, the shoe tilts and slides backward, and it is determined that the heel upper has water leakage. If the entire shoe upper absorbs water evenly and gains weight, the front and rear elastic plates are pressed down synchronously, the entire shoe sinks and directly fits the inclined table, slides laterally along the inclined table, and it is determined that the entire upper has water leakage. If the shoe does not absorb water and gain weight, the elastic plates remain lifted at a high position, the shoe is suspended and stably placed still, and it is determined that the product is qualified.

[0021] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, by adopting the discrimination principle of high-position elastic plate suspension support cooperating with water inlet self-weight pressing down and sliding landing, the elastic plates are higher than the inclined surface in a normal state, so the shoe is placed stably; after water inlet, the elastic plate at the corresponding position sinks, and directional sliding is realized relying on the inclined surface. Through the differentiated stress pressing state of the independent front and rear elastic plates, three defective working conditions, namely toe water leakage, heel water leakage and whole shoe upper water leakage, can be accurately distinguished, which completely solves the industrial problems of traditional testing such as consumable waste, low detection efficiency and inability to locate water leakage positions. It is specifically adapted to the exclusive waterproof detection scenario of the stitching and bonding seams of the shoe upper of lasting waterproof shoes, and the detection accuracy and practicability are greatly improved.

[0022] In the present invention, the air bag is driven to supply air by relying on the mechanical extrusion force of mold closing, no manual filling of sealing materials is required, no additional driving components such as air cylinders and motors are required, and by relying on the guiding adaptation characteristic of the tapered structure, shoe opening introduction, fitting, sealing and splash prevention operations can be automatically completed, completely replacing the traditional manual sealing process. The sealing force and position are uniformly consistent, which effectively avoids water splashing and test misjudgment caused by manual operation deviation, greatly saves labor costs and improves the degree of test standardization.

[0023] In the present invention, a stable positioning protection and adaptive sorting system is formed through the rubber inclined plate toe limit structure cooperating with the inclined shoe rack and the independent elastic plate structure. The shoe body can be effectively fixed during the test process, preventing the shoe from shifting and misaligning during sealing and water immersion; after the test is completed, qualified products can be retained and unqualified products can slide and be sorted automatically according to the water inlet state, realizing integrated operation of testing, discriminating and sorting, and effectively improving the automation level and operation efficiency of batch detection. Description of Drawings

[0024] Figure 1 is a schematic perspective structural view of the present invention; Figure 2 is a perspective sectional structural view of the test box of the present invention; Figure 3This is a schematic diagram showing the fitting of the water-immersing mold, shoe rack, and fixed mold head according to the present invention; Figure 4 This is a schematic diagram showing the distribution of the shoe rack and fixed mold head along the test box according to the present invention; Figure 5 This is an exploded view of the shoe rack, the fixing mold head, and the water immersion mold of the present invention; Figure 6 This is a three-dimensional structural cross-sectional view of the water-immersed mold of the present invention in the mold-closed state; Figure 7 This is a three-dimensional structural cross-sectional view of the immersion mold of the present invention in the mold-opening state; Figure 8 This is a three-dimensional structural cross-sectional view of the shoe rack of the present invention.

[0025] In the diagram: 1. Test box; 2. Shoe rack; 3. Fixed mold head; 4. Air duct; 5. Water injection pipe; 6. Overflow pipe; 7. Drain pipe; 8. Immersion mold; 9. Drive motor; 10. Lead screw; 11. Fitting notch; 12. Slide groove; 13. Spring plate; 14. Top spring; 15. Side mounting port; 16. Elastic airbag; 17. Flip frame; 18. Flexible plug; 19. Airtight plate; 20. Fan-shaped airtight groove; 21. Vent hole; 22. Rubber inclined plate. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figures 1 to 8This invention provides a technical solution: a waterproof testing device for waterproof uppers of shoes, comprising a test chamber 1, which serves as the overall mounting base for the device. Inside the test chamber 1, a shoe rack 2 and a fixed mold head 3 are fixedly installed. The fixed mold head 3 integrates an air duct 4, a water injection pipe 5, an overflow pipe 6, and a drain pipe 7. The air duct 4, water injection pipe 5, overflow pipe 6, and drain pipe 7 respectively fulfill the basic functions of post-test surface drying, cavity water injection, water level limiting, and test drainage. Two sets of immersion molds 8 are symmetrically slidably mounted inside the test chamber 1. A drive motor 9 and a lead screw 10 constitute a transmission assembly. The lead screw 10 adopts a bidirectional reverse thread structure, driving the two sets of immersion molds 8 to close or separate relative to each other via the forward and reverse rotation of the drive motor 9. After the two sets of immersion molds 8 are closed, they are tightly fitted and sealed with the shoe rack 2 and the fixed mold head 3 through an end-mounted fitting notch 11, forming a closed water storage cavity with an open top, providing a sealed water environment for the fixed-point immersion test of the shoe upper. The top surface of the shoe rack 2 is machined into an inclined platform. Two sets of sliding grooves 12 are provided on the top surface of the shoe rack 2. Each groove 12 has a sliding spring plate 13 and a top spring 14 slidably mounted inside. Under normal conditions, the top spring 14 elastically pushes the spring plate 13 upwards, making the top surface of the spring plate 13 higher than the inclined platform of the shoe rack 2, thus achieving suspended support for the shoe to be tested. Side mounting openings 15 are provided on the mating sides of both sets of immersion molds 8. Elastic airbags 16 are fixedly embedded inside the side mounting openings 15. A flipping frame 17 is rotatably mounted on the top of both sets of immersion molds 8. A flexible plug 18 for sealing the shoe opening is fixed to the outer end of the flipping frame 17, and an airtight plate 19 is fixed to the inner end of the flipping frame 17. Arc-shaped fan-shaped airtight grooves 20 are provided inside both sets of immersion molds 8. The airtight plate 19 is slidably and sealingly mounted inside the fan-shaped airtight grooves 20. The fan-shaped airtight grooves 20 are connected to the inner cavity of the elastic airbag 16 through a through-hole vent 21, forming a purely mechanical pneumatic linkage transmission structure. Meanwhile, rubber inclined plates 22 are fixedly mounted on the mating sides of both sets of immersion molds 8 to limit and fix the toe of the shoe under test during the test. Through the coordinated operation of various structures, this device can stably complete the entire standardized waterproof test process, including workpiece placement, mold closing and sealing, automatic hole sealing, water injection and immersion, drainage and drying, and mold opening and judgment.

[0028] In this embodiment, as Figures 1 to 8 As shown, the water-retaining cavity formed by the two sets of immersion molds 8 and the fixed mold head 3 precisely corresponds to the upper area of ​​the waterproof shoe being tested in terms of space size and coverage, and can completely cover the core weak points of water seepage, such as the upper seams and the upper-sole bonding seams. This structure abandons the traditional test method of soaking the entire shoe. By limiting the sealed immersion area through the two sets of immersion molds 8 and the fixed mold head 3, water pressure is applied only to the key test areas of the upper, avoiding problems such as water turbulence and uneven soaking caused by large-scale immersion. It can specifically detect water seepage defects such as tiny gaps and pinholes in the upper, accurately expose potential water seepage hazards in the upper, and provide accurate basis for subsequent leakage location identification and process rectification.

[0029] In this embodiment, as Figures 1 to 8 As shown, the overflow pipe 6 is fixedly mounted at a preset height on the upper part of the fixed mold head 3. During the water injection test, the overflow pipe 6 can overflow excess water in real time, precisely limiting the maximum immersion height of the water storage cavity, ensuring that the immersion depth and water pressure conditions are consistent for each batch of tests, and achieving standardized test conditions. The drain pipe 7 is located at the lowest position of the lower part of the fixed mold head 3. After the test, the drain pipe 7 can quickly and completely drain the water inside the cavity, leaving no water residue, avoiding the growth of impurities from residual water and affecting the sealing and accuracy of subsequent tests. The air outlet of the air duct 4 is set directly above the shoe rack 2. After drainage, the clean airflow output by the air duct 4 can sweep the outer surface of the shoe in all directions, thoroughly removing residual water stains attached to the upper, toe, and heel, retaining only the effective detection variable of water entering the shoe's interior, eliminating false leaks caused by water accumulation on the surface, and ensuring the accuracy and stability of batch test results.

[0030] In this embodiment, as Figures 1 to 8 As shown, the fan-shaped airtight groove 20 adopts an integrated arc-shaped sealed groove structure. The outer dimensions of the airtight plate 19 are perfectly matched with the groove shape of the fan-shaped airtight groove 20. The airtight plate 19 can make a sealing sliding movement along the groove trajectory of the fan-shaped airtight groove 20, and the sliding stroke is adapted to the pitch and rotation angle of the tilting frame 17. During the mold closing process, the extrusion force generated by the relative movement of the two sets of immersion molds 8 directly acts on the elastic airbag 16, causing the elastic airbag 16 to be compressed and the internal air pressure to increase. The high-pressure gas inside the elastic airbag 16 is uniformly introduced into the interior of the fan-shaped airtight groove 20 through the vent 21. The air pressure continuously pushes the airtight plate 19 to slide smoothly along the arc groove of the fan-shaped airtight groove 20, and simultaneously drives the tilting frame 17 to tilt downward, realizing the integrated linkage action of mechanical closing of the immersion mold 8, air pressure increase of the elastic airbag 16, sliding transmission of the airtight plate 19, and tilting frame 17 driving the flexible plug 18 to seal the hole. This structure requires no additional electrical or pneumatic auxiliary equipment; it relies entirely on the mechanical movement of the device itself to seal the shoe opening. The timing, force, and position of the sealing are uniformly controllable, replacing traditional manual sealing operations.

[0031] In this embodiment, as Figures 1 to 8As shown, the rubber inclined plate 22 fixed on both sides of the immersion mold 8 is an integral inclined elastic plate with elastic cushioning and self-adaptive limiting functions. During the mold closing operation, the symmetrically arranged rubber inclined plates 22 on both sides cooperate to form an elastic limiting groove that matches the shape of the shoe toe, elastically fitting and clamping the toe of the waterproof shoe to be tested. During the process of the flipping frame 17 pressing down and the flexible plug 18 being inserted into the shoe opening to complete the sealing, the elastic limiting structure of the rubber inclined plate 22 can effectively counteract the reverse pushing force generated by the pressing down of the flexible plug 18, limiting the displacement problems such as shoe body shifting, lifting, and misalignment throughout the process, so that the shoe under test has a fixed posture and stable position throughout the test, ensuring the uniformity of batch test conditions from a structural level and avoiding test errors caused by positioning failure.

[0032] In this embodiment, as Figures 1 to 8 As shown, the two sets of spring plates 13 on the shoe rack 2 are independently assembled, slide vertically independently, and bear load independently. The installation positions of the two sets of spring plates 13 correspond to the areas below the toe and below the heel of the shoe under test, respectively, realizing the zoned load-bearing test of the front and rear parts of the shoe. Under normal conditions, the elastic pushing force of the top spring 14 makes the top surface of the spring plate 13 higher than the inclined platform of the shoe rack 2. The shoe under test is only supported by the two sets of spring plates 13 and does not contact the inclined platform of the shoe rack 2, so the initial stress state is stable. After the water immersion test, if water seeps into the toe, heel, or upper of the shoe, the increased weight of the water in the corresponding area will generate a downward load on the spring plate 13 at the corresponding position, causing the spring plate 13 to sink against the elastic force of the top spring 14. After the spring plate 13 sinks, the shoe loses its suspended support, conforms to the inclined platform of the shoe rack 2, and slides directionally along the inclined surface. Staff can accurately distinguish between three types of defects—toe leakage, heel leakage, and overall leakage—based on the direction and state of the shoe's slippage, without the need for absorbent paper or other consumables to assist in the inspection.

[0033] In this embodiment, as Figures 1 to 8 As shown, the drive motor 9 is fixedly installed at a preset mounting point on the inner wall of the test chamber 1. The output shaft of the drive motor 9 is coaxially and fixedly connected to the end of the lead screw 10. The two ends of the lead screw 10 are rotatably assembled with the inner wall of the test chamber 1 through silent bearings. The overall transmission structure has high coaxiality, small transmission clearance, and stable operation. The forward and reverse rotation of the lead screw 10 can precisely control the opening and closing stroke and speed of the two sets of immersion molds 8, ensuring that the spacing and closing force of the molds are consistent each time, thereby making the compression amount of the elastic airbag 16, the sealing degree of the water storage cavity, the sealing depth of the flexible plug 18, and the pressure conditions of the immersion test completely uniform. This stable transmission structure effectively avoids the difference in test parameters caused by transmission deviation, greatly improves the repeatability of equipment testing, and ensures the consistency and reliability of test data for multiple batches of products.

[0034] In this embodiment, as Figures 1 to 8As shown, the flexible plug 18 fixed to the outer end of the flip frame 17 is made of highly elastic waterproof silicone material, which is water-resistant, corrosion-resistant, and has excellent elastic deformation capability. The flexible plug 18 is machined into a conical structure, with the small conical end facing the shoe opening. The outer diameter of the flexible plug 18 is slightly larger than the inner diameter of the shoe opening of a conventional waterproof shoe. During the sealing operation, the small conical end can act as a guide for alignment, adapting to the slight dimensional deviations of the shoe openings of different batches of shoes, and accurately inserting it into the shoe opening. After being fully inserted, the flexible plug 18 undergoes elastic deformation, forming an interference fit and seal with the inner wall of the shoe opening. The seal is tight and the splash-proof effect is good. It can effectively prevent water from splashing and seeping into the shoe cavity during the test, avoiding false leakage test results caused by passive water entering the shoe cavity, and ensuring the authenticity and validity of the test data.

[0035] In this embodiment, as Figures 1 to 8 As shown, a method for using a waterproof testing device for a waterproof upper of a shoe includes the following steps: S1. Place the waterproof shoes to be tested stably on the front and rear sets of spring plates 13 of the shoe rack 2. The shoes are in a free and upright state. At this time, the shoes are suspended and supported without contacting the inclined surface of the shoe rack 2.

[0036] S2. Control the drive motor 9 to run in the forward direction. The lead screw 10 drives the two immersion molds 8 to close synchronously. During the mold closing process, the rubber inclined plates 22 on both sides cooperate to clamp and fix the shoe toe, completing the shoe body limit fixation and preventing displacement during the sealing process. At the same time, the immersion mold 8 fits and seals with the shoe rack 2 and the fixed mold head 3 through the fitting notch 11 to form a sealed water storage cavity. During the closing process of the immersion mold 8, the side elastic airbag 16 is squeezed. The elastic airbag 16 is pressurized and generates air, which is sent into the fan-shaped airtight groove 20 through the vent 21. The air pressure pushes the airtight plate 19 to slide, driving the flipping frame 17 to flip downward, so that the conical flexible plug 18 is introduced and accurately inserted into the waterproof shoe opening, automatically completing the shoe opening sealing and preventing test water from splashing into the shoe cavity.

[0037] S3. Water is injected into the water storage cavity through the water injection pipe 5, and the overflow pipe 6 controls the water level inside the cavity in real time to ensure that the water level completely covers the weak areas of the upper seam and the sole-to-upper seam of the waterproof shoe. The static pressure test is performed for a preset test time to complete the static waterproof immersion test of the shoe upper.

[0038] S4. After the test is completed, open the drain pipe 7 to completely drain the water inside the cavity; after the drainage is completed, blow out clean air through the air duct 4 to blow and clean the outer surface of the waterproof shoe in all directions, thoroughly remove the water attached to the outer surface of the shoe, retain only the variable of increased weight due to water entering the shoe, and eliminate the interference of water accumulation on the outer surface with the test results.

[0039] S5. Control the drive motor 9 to rotate in reverse, drive the two immersion molds 8 to separate and reset, and the flip frame 17 to automatically spring back and reset as the air pressure is released, thus releasing the seal on the shoe opening; automatically determine the leakage situation according to the placement of the shoes: if the toe gets water and becomes heavier, press down the front spring plate 13, causing the front spring plate 13 to sink below the inclined platform of the shoe rack 2, the toe end sinks and the shoe tilts forward and slides down, indicating that the toe upper is leaking; if the heel gets water and becomes heavier, press down the rear spring plate 13, the shoe tilts backward and slides down, indicating that the heel upper is leaking; if the entire upper gets water and becomes heavier, press down the front and rear spring plates 13 simultaneously, the entire shoe sinks and directly adheres to the inclined platform, sliding down the side of the inclined platform, indicating that the entire upper is leaking; if the shoe does not get water and becomes heavier, the spring plate 13 remains in a high position, the shoe is suspended and stable, indicating that the product is qualified.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waterproof test device for a waterproofed shoe upper, comprising a test box (1), characterized in that: The test box (1) is fixedly installed with a shoe rack (2) for placing the waterproof shoes to be tested. A fixed mold head (3) is fixedly installed in the test box (1) and located in front of the shoe rack (2). The fixed mold head (3) is connected to and fixed with an air duct (4), a water injection pipe (5), an overflow pipe (6), and a drain pipe (7). Two immersion molds (8) are symmetrically slidably installed inside the test box (1). A lead screw (10) driven by a drive motor (9) is rotatably installed inside the test box (1). The two ends of the lead screw (10) are provided with opposing threads. The two immersion molds (8) are respectively matched with the threads at both ends of the lead screw (10) for transmission. The rotation of the lead screw (10) can drive the two immersion molds (8) to close relative to each other to form a water storage cavity with an open top. The two immersion molds (8) are provided with fitting notches (11) on their mating sides for fitting and sealing with the shoe rack (2) and the fixed mold head (3). The top surface of the shoe rack (2) is set as an inclined platform. Two sets of sliding grooves (12) are opened on the top surface of the shoe rack (2) along the front and back direction. Each set of sliding grooves (12) is slidably installed with a spring plate (13). The sliding grooves (12) are equipped with a top spring (14). The top spring (14) is used to push the spring plate (13) to slide vertically. The two immersion molds (8) have side mounting openings (15) on their mating sides. An elastic airbag (16) is fixedly embedded in the side mounting opening (15). A flipping frame (17) is rotatably mounted on the top of the immersion mold (8). A flexible plug (18) for sealing the shoe opening is fixed at the outer end of the flipping frame (17). An airtight plate (19) is fixed at the inner end of the flipping frame (17). A fan-shaped airtight groove (20) is opened inside the immersion mold (8). The airtight plate (19) is sealed and slidably assembled in the fan-shaped airtight groove (20). The fan-shaped airtight groove (20) is connected to the inner cavity of the elastic airbag (16) through a vent (21). A rubber inclined plate (22) for limiting the shoe toe is fixed on the mating side of the immersion mold (8). The spring plate (13) slides and is subjected to force independently. The front spring plate (13) is set below the toe of the shoe, and the rear spring plate (13) is set below the heel of the shoe. The top spring (14) normally pushes the top surface of the spring plate (13) slightly higher than the inclined platform of the shoe rack (2), so that the waterproof shoe is normally supported by the front and rear spring plates (13) in the air and does not contact the inclined platform. After the spring plate (13) is pressed down, it can slide and fit against the inclined platform.

2. A waterproof test device for waterproofing a shoe upper according to claim 1, wherein: The fixed mold head (3) and the two side immersion molds (8) are closed together to form a water storage cavity, which is set to cover the upper of the waterproof shoe to be tested.

3. The waterproof testing device for a waterproof upper of a shoe as described in claim 1, characterized in that: The overflow pipe (6) is located at the upper part of the fixed mold head (3), the drain pipe (7) is located at the lower part of the fixed mold head (3), and the air outlet of the air duct (4) is located facing the area above the shoe rack (2).

4. The waterproof testing device for a waterproof upper of a shoe as described in claim 1, characterized in that: The fan-shaped airtight groove (20) is an arc-shaped sealed groove structure. The shape of the airtight plate (19) matches the groove shape of the fan-shaped airtight groove (20). The airtight plate (19) slides along the groove trajectory to realize the pitch rotation of the flipping frame (17).

5. The waterproof testing device for a waterproof upper of a shoe as described in claim 1, characterized in that: The rubber inclined plate (22) is an inclined elastic plate. After the two immersion molds (8) are closed, the rubber inclined plates (22) on both sides cooperate to form a limiting groove, which clamps and fixes the toe position of the waterproof shoe to be tested.

6. The waterproof testing device for a waterproof upper of a shoe as described in claim 1, characterized in that: The drive motor (9) is fixedly installed on the inner side wall of the test box (1). The output shaft of the drive motor (9) is coaxially fixedly connected to the end of the lead screw (10). The two ends of the lead screw (10) are rotated and engaged with the inner wall of the test box (1) through bearings.

7. The waterproof testing device for a waterproof upper of a shoe as described in claim 1, characterized in that: The flexible plug (18) is made of elastic silicone. The flexible plug (18) has a conical structure with the small conical head facing the shoe opening. Its outer diameter is larger than the inner diameter of the waterproof shoe opening, so as to achieve guiding and interference sealing.

8. A method for using a waterproof testing device for a waterproof upper of a shoe, characterized in that, Using a waterproof testing device for a waterproof upper as described in any one of claims 1-7, the process includes the following steps: S1. Place the waterproof shoes to be tested stably on the front and rear sets of spring plates (13) of the shoe rack (2). The shoes are in a free upright state. At this time, the shoes are suspended and supported, and do not contact the inclined surface of the shoe rack (2). S2. Control the drive motor (9) to run in the forward direction. The screw (10) drives the two immersion molds (8) to close synchronously. During the mold closing process, the rubber inclined plates (22) on both sides cooperate to clamp and fix the shoe toe, complete the shoe body limit fixation, and prevent the sealing process from deviating. At the same time, the immersion mold (8) is fitted and sealed with the shoe rack (2) and the fixed mold head (3) through the fitting notch (11) to form a sealed water storage cavity. During the closing process of the immersion mold (8), the side elastic airbag (16) is squeezed. The elastic airbag (16) is pressurized and produces air and is sent into the fan-shaped airtight groove (20) through the vent (21). The air pressure pushes the airtight plate (19) to slide, which drives the flipping frame (17) to flip downward, so that the conical flexible plug (18) is introduced and accurately inserted into the waterproof shoe opening, automatically completing the shoe opening sealing and preventing the test water from splashing into the shoe cavity. S3. Water is injected into the water storage cavity through the water injection pipe (5), and the overflow pipe (6) controls the water level inside the cavity in real time to ensure that the water level completely covers the weak areas of the upper seam and the sole seam of the waterproof shoe upper. The static pressure test is set for a preset test time to complete the static waterproof immersion test of the shoe upper. S4. After the test is completed, open the drain pipe (7) to completely drain the water inside the cavity; after the drainage is completed, blow out clean air through the air duct (4) to blow the waterproof shoe surface in all directions, thoroughly remove the water attached to the outer surface of the shoe, retain only the variable of increased weight due to water entering the shoe, and prevent the external water from interfering with the test results. S5. Control the drive motor (9) to run in reverse, drive the two immersion molds (8) to separate and reset, and the flip frame (17) automatically rebounds and resets as the air pressure is released, thus releasing the shoe opening seal; automatically judge the leakage situation according to the shoe placement status: if the shoe toe is water-filled and the weight increases, press down the front spring plate (13) so that the front spring plate (13) sinks below the inclined platform of the shoe rack (2), the shoe toe sinks and the shoe tilts forward and slides down, which is judged as the shoe toe upper leaking water; if the shoe heel is water-filled and the weight increases, press down the rear spring plate (13) so that the shoe tilts backward and slides down, which is judged as the shoe heel upper leaking water; if the shoe upper is uniformly water-filled and the weight increases, press down the front and rear spring plates (13) simultaneously, the shoe sinks and directly adheres to the inclined platform, and slides down the side of the inclined platform, which is judged as the overall upper leaking water; if the shoe does not have water-filled and the weight increases, the spring plate (13) remains in a high position, the shoe is suspended and stable, which is judged as the product is qualified.

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