Plastic Wing Chun pole

Abstract

The invention relates to the technical field of Wing Chun poles, and discloses a plastic Wing Chun pole which is composed of a pole body, pole hands and pole feet, and the pole body, the pole hands and the pole feet on the plastic Wing Chun pole are manufactured through a rotational molding process; the raw materials comprise high-density polyethylene, linear low-density polyethylene, an ethylene-vinyl acetate copolymer, a hindered amine light stabilizer, an ultraviolet screening agent, an antioxidant, a lubricant and a compatilizer. Wherein the lubricant adopts PE wax, the compatilizer adopts MAH-g-PE, the antioxidant is formed by compounding an antioxidant 1010 and an antioxidant 168 according to the ratio of 1: 1, and the ultraviolet screening agent adopts carbon black master batch. According to the plastic Wing Chun pole, various defects in the prior art are overcome through a scientific formula and a scientific process. Compared with a traditional Wing Chun pole, the Wing Chun pole is remarkably improved in outdoor weather resistance, can resist ultraviolet and rainwater erosion and can be stably used for a long time; the pile foot structure is enhanced, standardized production can be achieved, consistent quality is guaranteed, a sheath is not needed, the weight is light, and installation and transportation are convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of Wing Chun piles, and in particular relates to a plastic Wing Chun pile. Background Art

[0002] As a core weapon in the Wing Chun training system, the Wing Chun stance, with its body, hands, and feet mimicking the human form, helps practitioners master force generation techniques, distance control, and reaction speed. Widely used in martial arts gyms, fitness centers, and personal training settings, traditional Wing Chun stances are often crafted from natural materials like wood (such as camphor and oak) or stone. These stances are shaped by hand or through simple machining, relying on the inherent hardness and structural stability of the material to meet fundamental training requirements.

[0003] With the widespread adoption of fitness and the expansion of outdoor training options, the use of Wing Chun piles has gradually shifted from indoors to open-air venues such as parks and community fitness areas. However, the inherent properties of traditional materials conflict with the complex outdoor environment (such as UV radiation, rain, and temperature fluctuations). When used outdoors for long periods, the cellulose and lignin in traditional wooden Wing Chun piles are easily degraded by UV radiation, causing cracking and discoloration. Furthermore, moisture from rain seeps into the interior, easily causing mold growth and rot, severely shortening their service life. They typically need to be replaced after one to two years, resulting in high maintenance costs. While stone Wing Chun piles are relatively resistant to corrosion, prolonged exposure to sunlight can cause surface weathering and weaken their structural strength. They are also prone to cracking due to freeze-thaw cycles in low-temperature environments. Traditional Wing Chun piles rely on the varying textures of natural materials and the precision of manual processing, resulting in significant product quality fluctuations. For example, the density of the wood's annual rings and the direction of its grain will directly affect the hardness and impact resistance of the pile. Products from the same batch may have problems of "some are too hard and some are too soft"; the hand-carved pile hands and feet have large size deviations, which affects the standardization of training movements and makes it difficult to meet standardized training needs.

[0004] In view of this, we propose a plastic Wing Chun pile to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve the technical problems in the above-mentioned prior art that Wing Chun piles are prone to aging and rotting when used outdoors, the pile feet are prone to breakage, the quality is uneven, they are not environmentally friendly, they are inconvenient to use and transport, and they affect training effects and safety.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A plastic Wing Chun pole, comprising a pole body, a pole handle and a pole foot, wherein the pole body, the pole handle and the pole foot are respectively made by rotational molding;

[0008] The plastic Wing Chun pile includes the following raw materials in parts by weight:

[0009] 70-85 parts of high-density polyethylene (HDPE);

[0010] 15-30 parts of linear low-density polyethylene (LLDPE);

[0011] 5 to 10 parts of ethylene vinyl acetate copolymer EVA;

[0012] 0.5-1.5 parts of hindered amine light stabilizer HALS;

[0013] 2 to 4 parts of UV shielding agent;

[0014] 0.3-0.8 parts of antioxidant;

[0015] 0.5-1.0 parts of lubricant;

[0016] 2 to 5 parts of compatibilizer;

[0017] Among them, the lubricant is PE wax, the compatibilizer is MAH-g-PE, the antioxidant is antioxidant 1010 and antioxidant 168 compounded in a ratio of 1:1, and the ultraviolet shielding agent is carbon black masterbatch.

[0018] High-density polyethylene (HDPE) is the primary raw material (70-85 parts), ensuring the overall rigidity and structural strength of the Wing Chun pile. The addition of linear low-density polyethylene (LLDPE, 15-30 parts) enhances the material's flexibility and impact resistance, preventing breakage due to collisions or uneven force. Ethylene-vinyl acetate copolymer (EVA, 5-10 parts) further enhances the material's elasticity and processing fluidity, making it easier for the raw material to fill the mold cavity during rotational molding, ensuring product dimensional stability. The synergistic effect of these three resins addresses the issues of traditional materials being too hard and prone to breakage or too soft and deforming, while ensuring both durability and safety. The combination of hindered amine light stabilizers (HALS) and UV shielding agents (carbon black masterbatch) effectively absorbs and blocks ultraviolet rays, delaying the aging of plastics (such as cracking and discoloration) under outdoor exposure, thus resolving the issue of traditional piles being susceptible to sunlight. Antioxidant 1010 / 168 (1:1 compound) can inhibit the oxidative degradation of the material during high-temperature processing and long-term use, thereby extending its service life; carbon black masterbatch also has certain anti-aging and light-shielding effects, further enhancing weather resistance.

[0019] The lubricant (PE wax) reduces friction during mixing and extrusion, preventing agglomeration and equipment wear, and improving processing efficiency. The compatibilizer (MAH-g-PE) promotes uniform dispersion of different resins (HDPE, LLDPE, EVA) and additives, avoiding localized performance defects caused by uneven composition and resolving the inconsistent quality and mixed quality of traditional products. The material utilizes environmentally friendly plastics such as polyethylene, releasing no toxic or hazardous substances. Its Shore hardness is controlled at 55D-65D, eliminating the need for an additional sheath. It is neither too hard to injure the user nor too soft to affect training effectiveness.

[0020] Preferably, the plastic Wing Chun pile comprises the following raw materials in parts by weight:

[0021] 77 parts of high-density polyethylene (HDPE);

[0022] 22 parts of linear low-density polyethylene LLDPE;

[0023] 7 parts of ethylene vinyl acetate copolymer EVA;

[0024] 1 part of hindered amine light stabilizer HALS;

[0025] 3 parts of UV shielding agent;

[0026] 0.5 parts of antioxidant;

[0027] 0.7 parts of lubricant;

[0028] 3.5 parts of compatibilizer.

[0029] Preferably, the plastic Wing Chun pile comprises the following raw materials in parts by weight:

[0030] 82 parts of high-density polyethylene (HDPE);

[0031] 18 parts of linear low-density polyethylene (LLDPE);

[0032] 6 parts of ethylene vinyl acetate copolymer EVA;

[0033] 1.2 parts of hindered amine light stabilizer HALS;

[0034] 2.5 parts of UV shielding agent;

[0035] 0.6 parts of antioxidant;

[0036] 0.8 parts of lubricant;

[0037] 4 parts of compatibilizer.

[0038] Preferably, the plastic Wing Chun pile comprises the following raw materials in parts by weight:

[0039] 72 parts of high-density polyethylene (HDPE);

[0040] 28 parts of linear low-density polyethylene (LLDPE);

[0041] 9 parts of ethylene vinyl acetate copolymer EVA;

[0042] 0.8 parts of hindered amine light stabilizer HALS;

[0043] 3.5 parts of UV shielding agent;

[0044] 0.4 parts of antioxidant;

[0045] 0.6 parts of lubricant;

[0046] 3.0 parts of compatibilizer.

[0047] The three preferred formulas (such as 77 parts HDPE + 22 parts LLDPE + 7 parts EVA) further optimize the proportions within the basic formula to achieve a balance between raw material cost, processing performance and finished product performance. By adjusting the ratio of HDPE to LLDPE, the rigidity and toughness of the product can be fine-tuned (for example, a higher HDPE ratio means stronger rigidity, and a higher LLDPE ratio means better impact resistance). The dosage of additives such as light stabilizers and UV shielding agents is precise, ensuring weather resistance while avoiding waste and reducing production costs. The finished product has a stable Shore hardness of 58-63D, which meets the training needs of most users and has a wider applicability.

[0048] Preferably, the method for preparing the plastic Wing Chun pile comprises the following steps:

[0049] S1. Raw material pretreatment

[0050] Add high-density polyethylene, linear low-density polyethylene and ethylene-vinyl acetate copolymer into the drying equipment and dry them at 75-85°C and vacuum degree of -0.07 to -0.09 MPa for 2.5 to 3.5 hours, controlling the moisture content of the raw materials to ≤0.05%;

[0051] Add the dried raw materials, compatibilizer and lubricant into a high-speed mixer, mix them at a speed of 400-600 r / min for 1.5-3 minutes, then at a speed of 1500-2000 r / min for 4-6 minutes, finally add carbon black masterbatch, light stabilizer and antioxidant, and mix them at a speed of 1800-2200 r / min for 3-5 minutes to obtain a premix;

[0052] S2. Melt blending and granulation

[0053] The premix is ​​added to a twin-screw extruder, and the temperature of the extruder from the feeding section to the die head is 135-150°C, 155-170°C, 170-185°C, 180-195°C, 190-200°C, 195-205°C, 190-200°C, and 185-195°C, the screw speed is 300-400r / min, the feeding speed is 20-30r / min, the vacuum degree is -0.05 to -0.07MPa, and after water cooling and pelletizing, pellets with a particle size of 2.5-3.5mm and a length of 3-5mm are obtained;

[0054] S3.Rotational molding

[0055] Put the pellets into the Wing Chun pile split mold, preheat the mold to 80-120℃ and keep it for 10-15 minutes; start the double-axis rotational molding machine, control the mold revolution speed to 5-10r / min and rotation speed to 3-7r / min, first heat it to 170-180℃ at a rate of 15-20℃ / min, keep it warm for 25-35 minutes, then heat it to 180-190℃ and keep it for 5-10 minutes;

[0056] S4. Cooling and demoulding

[0057] Stop heating, keep the mold rotating and cool naturally for 15-25 minutes to 100-120℃, then force-cool to ≤60℃ at a wind speed of 4-8m / s, open the mold and take out the crude product;

[0058] S5. Post-processing

[0059] The rough products are trimmed to control the residual thickness of the flash to ≤0.3mm, and the dimensional deviation is: pile height 1600±1.5mm, diameter 320-350±2.0mm; use a 5-8bar high-pressure water gun to clean at 40-60℃ for 30-60 seconds, spray with a 0.1-0.2mm thick fluorocarbon coating after drying, and dry at 60-80℃ for 20-40 minutes;

[0060] S6. Assembly and testing

[0061] Connect the pile body, pile arm and pile foot, and test the finished product to have a Shore hardness of 58-63D, a tensile strength of ≥25MPa, and an impact strength of ≥90kJ / m².

[0062] Raw material pretreatment ensures raw material stability, and the drying step (75-85°C, vacuum conditions) removes moisture from the raw materials to avoid bubbles or holes caused by water evaporation during rotational molding, ensuring product density. Staged high-speed mixing fully disperses the raw materials and additives to avoid local excessive concentration (such as carbon black masterbatch aggregation leading to uneven color, and uneven distribution of light stabilizers leading to local aging).

[0063] Melt blending and granulation improves raw material uniformity. The multi-stage temperature control of the twin-screw extruder (135-205°C) allows the raw materials to melt gradually, avoiding local overheating and degradation. The design of the aspect ratio of 36:1-48:1 enhances the shearing and mixing effects, ensuring the uniform composition of the pellets. The pellet size (2.5-3.5mm particle size, 3-5mm length) and melt flow rate (1.0-2.5g / 10min) are stable, facilitating quantitative feeding and melt molding during subsequent rotational molding, reducing product dimensional deviation.

[0064] Roto-molding ensures the structural integrity of the product. Mold preheating (80-120°C) reduces temperature shock after raw materials are put in, avoiding molding defects caused by local excessive cooling. Biaxial rotation (revolution 5-10r / min, rotation 3-7r / min) allows the molten raw materials to adhere evenly to the inner wall of the mold, ensuring uniform wall thickness of the pile body, pile arms, and pile feet (no thin or thick spots). Staged heating (170-180°C for insulation, then rising to 180-190°C) ensures that the raw materials are fully melted and bubbles are eliminated, thereby improving product strength.

[0065] Cooling and demoulding reduce internal stress. First cool naturally and then force air cooling to avoid excessive temperature difference between the inside and outside caused by rapid cooling, and reduce internal stress of the product (excessive internal stress will cause cracking during later use); cool to ≤60℃ and demould to avoid deformation caused by removing the parts at high temperature.

[0066] Post-processing improves appearance and performance, and trimming controls the remaining burrs to ≤0.3mm, ensuring the product's aesthetics and safety (no burrs). Dimensional deviations are strictly controlled (e.g., pile height 1600±1.5mm) to ensure consistency across different products. The fluorocarbon coating (0.1-0.2mm thick) offers excellent weather and corrosion resistance, further blocking UV and rain erosion. Combined with the anti-aging additives in the raw materials, the product can be used outdoors for a long time (solving the problem of traditional piles becoming "mildewed and rotten due to rainwater"). High-pressure cleaning removes surface impurities to ensure firm adhesion of the coating.

[0067] Assembly and testing ensure product quality. Testing of Shore hardness (58-63D), tensile strength (≥25MPa), and impact strength (≥90kJ / m²) ensures that product performance meets standards. Xenon lamp aging testing (no cracking or powdering after 1000 hours) verifies weather resistance and ensures stability for long-term outdoor use.

[0068] Preferably, the length-to-diameter ratio L / D of the twin-screw extruder in step S2 is 36:1-48:1, and the melt flow rate of the pellets is 1.0-2.5 g / 10 min.

[0069] Preferably, the mold in step S3 is made of aluminum alloy, with a cavity surface roughness of Ra 0.8-1.6 μm. The material feed rate is calculated as follows: mold volume x 0.94-0.96 g / cm³ x 1.05-1.15 shrinkage coefficient. Aluminum alloy molds offer excellent thermal conductivity and uniform heating and cooling, ensuring consistent product molding. A cavity surface roughness of Ra 0.8-1.6 μm ensures a smooth product surface and reduces post-processing effort.

[0070] The material feed amount is calculated as (mold volume x 0.94-0.96 g / cm³ x 1.05-1.15 shrinkage coefficient). The density of polyethylene is approximately 0.94-0.96 g / cm³. Combined with the shrinkage rate of the plastic after cooling (1.05-1.15 times), this ensures that the material feed amount is sufficient to fill the mold without causing excessive flash due to excessive material or material shortages due to insufficient material. This reduces material waste, ensures accurate product dimensions, and lowers post-processing costs.

[0071] Preferably, the solid content of the fluorocarbon coating in step S5 is 45% to 55%, and the coating is sprayed at a pressure of 0.25-0.4 MPa and a spraying distance of 150 to 250 mm.

[0072] Preferably, the weather resistance test in step S6 adopts a xenon lamp aging test under the conditions of 300-400nm ultraviolet light, 60±5°C, and 80±5% humidity, and there is no cracking or powdering after 1000 hours.

[0073] As a preference, the pile body adopts a cylindrical structure, and the mold size is designed according to ergonomics. The pile body height is 160cm and the diameter is 30-35cm. The bottom of the pile body is designed with a reserved slot to match the base installation, and the pile body is reserved with reserved holes for the pile hand and pile foot to insert and position the installation.

[0074] The pile handle is designed to be conical, with an insert rod integrally formed on the pile handle and inserted into the reserved hole. The insert rod is provided with a positioning groove that cooperates with the clamping rod to position the pile handle on the pile body.

[0075] The pile foot adopts a solid or 8-10mm thick-walled L-shaped structure. The pile foot is also integrally formed with a plug rod inserted into the reserved hole. The plug rod is also provided with a positioning groove that cooperates with the clamping rod to position the pile hand on the pile body.

[0076] The ergonomic cylindrical structure, with a height of 160cm and a diameter of 30-35cm, accommodates the heights and exertion habits of most trainees. The bottom retaining slots and pre-set holes facilitate installation with the base, while the plug-in design of the handles and feet simplifies assembly and solves the inconvenience of traditional pile installation. The tapered handles align with the force application angle of training. The plug-in rod and positioning slot connection ensures a secure installation of the handles and feet, preventing them from falling off during use. The solid or thick-walled (8-10mm) L-shaped foot enhances overall stability, solving the problem of breakage in traditional piles.

[0077] Compared with the prior art, the technical effects and advantages of the present invention are:

[0078] This invention significantly improves outdoor weather resistance. Existing Wing Chun poles are susceptible to aging and cracking due to sun exposure during long-term outdoor use, and can also become moldy and rotten after being exposed to rain, making them difficult to maintain normal use. However, this invention, through a scientific combination of anti-aging additives and a surface fluorocarbon coating, effectively resists UV erosion and rain, ensuring long-term stable use in outdoor environments. This significantly reduces damage caused by environmental factors and extends the product's service life.

[0079] The present invention far surpasses existing technologies in terms of quality stability and ease of use. Existing technologies rely on natural materials and manual processing, resulting in uneven product quality and a mixed bag of good and bad products. They are often too heavy and too hard, requiring additional sheaths, and are also inconvenient to install and transport. The present invention ensures consistent product quality through a standardized raw material formula and an industrialized rotational molding production process. At the same time, its hardness can be flexibly adjusted, allowing safe use without a sheath, and it is also lighter in weight, greatly simplifying the installation and transportation process and improving the user experience.

[0080] This invention offers significant advantages in terms of environmental protection and sustainability. Existing technologies often use natural wood or stone, which not only consumes significant amounts of natural resources but also uses hazardous substances during some processing steps, which is not environmentally friendly. This invention uses environmentally friendly polyethylene materials, which release no toxic or hazardous substances during the production process. This avoids excessive consumption of natural resources and reduces environmental pollution, meeting the requirements of modern green development and offering greater sustainability. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] Figure 1 This is a first perspective view of the present invention;

[0082] Figure 2 This is a second viewing angle diagram of the present invention;

[0083] Figure 3 It is a structural schematic diagram of the pile body of the present invention;

[0084] Figure 4 It is a structural schematic diagram of the pile hand of the present invention;

[0085] Figure 5 It is a structural schematic diagram of the pile foot of the present invention;

[0086] Figure 6 This is a structural schematic diagram of the clamping rod of the present invention positioning the pile hand and pile foot on the pile body.

[0087] In the figure: 1. Pile body; 11. Reserved positioning slot; 12. Reserved hole; 2. Pile handle; 21. Insert rod; 22. Positioning slot; 3. Pile foot; 4. Clamping rod. DETAILED DESCRIPTION

[0088] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0089] The following combination Figures 1 to 6 To further explain this application,

[0090] A plastic Wing Chun pile includes a pile body 1, a pile hand 2 and a pile foot 3. The pile hand 2 is conical and has an integrally formed insertion rod 21 on the pile hand 2 for inserting and positioning with the pile body 1. The pile foot 3 adopts a solid or 8-10 mm thick L-shaped structure and has an integrally formed insertion rod 21 on the pile foot 3. A reserved hole 12 is provided on the pile body 1 for inserting and positioning with the insertion rod 21. After the pile hand 2 and the pile foot 3 are respectively inserted into the reserved holes 12 through the insertion rod 21 thereon, a clamping rod 4 is inserted into the insertion rod 21 on the side away from the pile hand 2 and the pile foot 3. The clamping rod 4 is inserted into and clamped into the positioning groove 22 of the insertion rod 21, so that the pile hand 2 and the pile foot 3 are positioned and installed on the pile body 1; a clamping groove 11 is reserved at the bottom of the pile body 1 to facilitate clamping into the installation base for subsequent fixation.

[0091] The body 1, the hand 2 and the foot 3 of the plastic Wing Chun pile are respectively made by rotational molding, as shown in the following embodiment;

[0092] Example 1

[0093] 1. Raw material composition (parts by weight)

[0094] High-density polyethylene (HDPE): 77 parts;

[0095] Linear low-density polyethylene (LLDPE): 22 parts;

[0096] Ethylene vinyl acetate copolymer (EVA, VA content 25%): 7 parts;

[0097] Hindered amine light stabilizer (HALS, Chimassorb944): 1 part;

[0098] UV shielding agent (carbon black masterbatch, carbon black content 45%): 3 parts;

[0099] Antioxidant (1:1): 0.5 parts;

[0100] Lubricant (PE wax, melting point 105°C): 0.7 parts;

[0101] Compatibilizer (MAH-g-PE, grafting rate 1.0%): 3.5 parts;

[0102] 2. Preparation Steps

[0103] S1. Raw material pretreatment: HDPE, LLDPE, and EVA were placed in a vacuum drying oven and dried at 80°C and -0.08 MPa for 3 hours (moisture content: 0.03%). After drying, the raw materials, compatibilizer, and PE wax were added to a high-speed mixer and mixed at 400 rpm for 2 minutes and 1800 rpm for 5 minutes. Finally, carbon black masterbatch, HALS, and antioxidant were added and mixed at 2000 rpm for 4 minutes to obtain a premix.

[0104] S2. Melt blending and granulation: A twin-screw extruder with a length-to-diameter ratio of 40:1 was used. The temperatures from the feeding section to the die were 140°C, 160°C, 175°C, 185°C, 195°C, 200°C, 195°C, and 190°C, respectively. The screw speed was 350 r / min, the feeding speed was 25 r / min, and the vacuum degree was -0.06 MPa. After water cooling and pelletizing, 3 mm × 4 mm pellets (melt flow rate 1.8 g / 10 min) were obtained.

[0105] S3. Roto-molding: The pellets were placed into an aluminum alloy mold (Ra 1.2 μm), and the mold was preheated to 100°C for 12 minutes. The dual-axis roto-molding machine was rotated at 8 r / min and 5 r / min, and the temperature was raised to 175°C at a rate of 18°C / min and maintained for 30 minutes. The temperature was then raised to 185°C and maintained for 8 minutes.

[0106] S4. Cooling and demoulding: Naturally cool to 110°C for 20 minutes, then cool to 55°C at a wind speed of 6m / s, and open the mold to remove the crude product.

[0107] S5. Post-processing: After trimming, the remaining flash is 0.2mm. The height of pile body 1 is 1600±1mm and the diameter is 335±1.5mm. Clean with a 5bar high-pressure water gun at 50℃ for 45 seconds, spray a fluorocarbon coating with a solid content of 50% (0.15mm thick), and dry at 70℃ for 30 minutes.

[0108] S6. Assembly and testing: The pile arm 2 and pile foot 3 are respectively inserted into the reserved hole 12 of the pile body 1 through the insertion rod 21 thereon. Then, the clamping rod 4 is clamped into the positioning groove 22 and pressed against the pile body 1 to complete the assembly. The Shore hardness, tensile strength, and impact strength of the pile body were tested to be 60D, 27MPa, and 95kJ / m², and no cracks were found after 1000 hours of xenon lamp aging.

[0109] Example 2

[0110] 1. Raw material composition (parts by weight)

[0111] High-density polyethylene (HDPE): 82 parts;

[0112] Linear low-density polyethylene (LLDPE): 18 parts;

[0113] Ethylene vinyl acetate copolymer (EVA, VA content 25%): 6 parts;

[0114] Hindered amine light stabilizer (HALS, Chimassorb944): 1.2 parts;

[0115] UV shielding agent (carbon black masterbatch, carbon black content 45%): 2.5 parts

[0116] Antioxidant (1:1): 0.6 parts;

[0117] Lubricant (PE wax, melting point 105°C): 0.8 parts;

[0118] Compatibilizer (MAH-g-PE, grafting rate 1.0%): 4 parts;

[0119] 2. Preparation Steps

[0120] S1. Raw material pretreatment: drying at 75°C and vacuum degree -0.07 MPa for 3.5 hours (moisture content 0.04%); mixing in a high-speed mixer at 500 rpm for 1.5 minutes, 1500 rpm for 6 minutes, and 2200 rpm for 3 minutes.

[0121] S2. Melt blending and granulation: extruder with an aspect ratio of 36:1, temperatures of 135°C, 155°C, 170°C, 180°C, 190°C, 195°C, 190°C, and 185°C, screw speed of 300 r / min, feed speed of 20 r / min, and pellet melt flow rate of 1.5 g / 10 min.

[0122] S3. Roto-molding: Preheat the mold to 80℃ for 15 minutes, rotate at 5 r / min and 3 r / min, then heat to 170℃ at 15℃ / min and keep at this temperature for 35 minutes. Finally, keep at 180℃ for 10 minutes.

[0123] S4. Cooling and demoulding: Natural cooling for 25 minutes to 100°C, and then air cooling to 50°C at a wind speed of 4m / s.

[0124] S5. Post-processing: Flash residue of 0.3mm, dimensional deviation of 1600±1.5mm and 330±2mm; cleaning with 8bar high-pressure water gun at 40℃ for 30 seconds, fluorocarbon coating of 0.1mm thickness, drying at 60℃ for 40 minutes.

[0125] S6. Assembly and testing: The pile arm 2 and pile foot 3 are respectively inserted into the reserved hole 12 of the pile body 1 through the insertion rod 21 thereon, and then the clamping rod 4 is clamped into the positioning groove 22 and pressed against the pile body 1 to complete the assembly; the Shore hardness, tensile strength, and impact strength of the pile body are tested to be 63D, 29MPa, and 92kJ / m², and the weather resistance test is passed.

[0126] Example 3

[0127] 1. Raw material composition (parts by weight)

[0128] High-density polyethylene (HDPE): 72 parts

[0129] Linear low-density polyethylene (LLDPE): 28 parts;

[0130] Ethylene vinyl acetate copolymer (EVA, VA content 25%): 9 parts;

[0131] Hindered amine light stabilizer (HALS, Chimassorb944): 0.8 parts;

[0132] UV shielding agent (carbon black masterbatch, carbon black content 45%): 3.5 parts;

[0133] Antioxidant (1:1): 0.4 parts;

[0134] Lubricant (PE wax, melting point 105°C): 0.6 parts;

[0135] Compatibilizer (MAH-g-PE, grafting rate 1.0%): 3 parts;

[0136] 2. Preparation Steps

[0137] S1. Raw material pretreatment: drying at 85°C and vacuum degree -0.09 MPa for 2.5 hours (moisture content 0.02%); mixing in a high-speed mixer at 600 rpm for 3 minutes, 2000 rpm for 4 minutes, and 1800 rpm for 5 minutes.

[0138] S2. Melt blending and granulation: extruder with an aspect ratio of 48:1, temperatures of 150°C, 170°C, 185°C, 195°C, 200°C, 205°C, 200°C, and 195°C, screw speed of 400 r / min, feed speed of 30 r / min, and pellet melt flow rate of 2.2 g / 10 min.

[0139] S3. Roto-molding: Preheat the mold at 120°C for 10 minutes, rotate at 10 r / min and 7 r / min, then heat to 180°C at 20°C / min and keep at that temperature for 25 minutes. Then keep at 190°C for 5 minutes.

[0140] S4. Cooling and demoulding: Naturally cool to 120℃ for 15 minutes, and then cool to 60℃ with a wind speed of 8m / s.

[0141] S5. Post-processing: Flash residue of 0.1mm, dimensional deviation of 1600±0.8mm and 340±1mm; cleaning with a 6bar high-pressure water gun at 60℃ for 60 seconds, fluorocarbon coating of 0.2mm thickness, and drying at 80℃ for 20 minutes.

[0142] S6. Assembly and testing: The pile arm 2 and pile foot 3 are respectively inserted into the reserved hole 12 of the pile body 1 through the insertion rod 21 thereon, and then the clamping rod 4 is clamped into the positioning groove 22 and pressed against the pile body 1 to complete the assembly; the Shore hardness, tensile strength, and impact strength of the pile body are tested to be 58D, 26MPa, and 98kJ / m², and the weather resistance test is passed.

[0143] Example 4

[0144] 1. Raw material composition (parts by weight)

[0145] High-density polyethylene (HDPE): 80 parts;

[0146] Linear low-density polyethylene (LLDPE): 20 parts;

[0147] Ethylene vinyl acetate copolymer (EVA, VA content 25%): 8 parts;

[0148] Hindered amine light stabilizer (HALS, Chimassorb944): 1.4 parts;

[0149] UV shielding agent (carbon black masterbatch, carbon black content 45%): 2 parts;

[0150] Antioxidant (1:1): 0.7 parts;

[0151] Lubricant (PE wax, melting point 105°C): 0.9 parts;

[0152] Compatibilizer (MAH-g-PE, grafting rate 1.0%): 1.4 parts;

[0153] 2. Preparation Steps

[0154] S1. Raw material pretreatment: drying at 80°C, vacuum degree -0.08 MPa for 3 hours (moisture content 0.03%); mixing in a high-speed mixer at 500 rpm for 2 minutes, 1800 rpm for 5 minutes, and 2000 rpm for 4 minutes.

[0155] S2. Melt blending and granulation: extruder with aspect ratio 40:1, temperature as in Example 1, screw speed 350 r / min, pellet melt flow rate 1.6 g / 10 min.

[0156] S3. Rotomolding: Preheat the mold at 100°C for 12 minutes, rotate at 7 r / min and 4 r / min, then heat to 175°C at 17°C / min and hold for 30 minutes. Finally, hold at 185°C for 7 minutes.

[0157] S4. Cooling and demoulding: Naturally cool to 110°C for 20 minutes, and then cool to 55°C at a wind speed of 5m / s.

[0158] S5. Post-processing: Flash residue 0.2mm, dimensional deviation 1600±1.2mm, 335±1.8mm; cleaning with a 7bar high-pressure water jet at 50°C for 40 seconds, fluorocarbon coating 0.15mm thick, drying at 70°C for 30 minutes;

[0159] S6. Assembly and testing: The pile arm 2 and pile foot 3 are respectively inserted into the reserved hole 12 of the pile body 1 through the insertion rod 21 thereon, and then the clamping rod 4 is clamped into the positioning groove 22 and pressed against the pile body 1 to complete the assembly; the Shore hardness, tensile strength, and impact strength of the pile body 1 are detected to be 61D, 28MPa, and 94kJ / m², and the weather resistance test is passed.

[0160] Table 1 Composition of raw materials (parts by weight) of Examples 1 to 4

[0161] raw material Example 1 Example 2 Example 3 Example 4 High-density polyethylene (HDPE) 77 82 72 80 Linear low-density polyethylene (LLDPE) 22 18 28 20 Ethylene vinyl acetate copolymer (EVA, VA content 25%) 7 6 9 8 Hindered amine light stabilizer (HALS, Chimassorb944) 1 1.2 0.8 1.4 UV shielding agent (carbon black masterbatch, carbon black content 45%) 3 2.5 3.5 2 Antioxidant (1:1) 0.5 0.6 0.4 0.7 Lubricant (PE wax, melting point 105°C) 0.7 0.8 0.6 0.9 Compatibilizer (MAH-g-PE, grafting rate 1.0%) 3.5 4 3 1.4

[0162] Table 2 Comparison of performance test results of Examples 1 to 4

[0163] Performance indicators Example 1 Example 2 Example 3 Example 4 Shore hardness 60D 63D 58D 61D tensile strength 27MPa 29MPa 26MPa 28MPa Impact strength 95kJ / m² 92kJ / m² 98kJ / m² 94kJ / m² Weather resistance (xenon lamp aging) 1000 hours without cracking Passed the test Passed the test Passed the test

[0164] The plastic Wing Chun pole is made from a specific proportion of polyethylene resin, combined with anti-aging additives and processing aids. Through rotational molding, the pole body, arms, and legs are integrated into one. The core principle is to leverage the melt flowability of the resin material and the uniform adhesion properties of mold rotation, combined with the synergistic effect of additives. This ensures structural strength while imparting weather resistance and impact resistance. Precise post-processing and assembly ensure the finished product is suitable for training needs.

[0165] Compared to existing technologies, plastic Wing Chun piles offer significant advantages in outdoor adaptability. Traditional materials are susceptible to aging, rotting, and cracking due to UV rays and rain. However, these plastic piles, through the combination of antioxidants, light stabilizers, and a fluorocarbon coating, can withstand complex outdoor environments for extended periods, significantly extending their service life and requiring less frequent maintenance. The pile base features a reinforced structural design, eliminating the fragility of traditional pile bases and providing superior overall sturdiness.

[0166] The plastic Wing Chun pile also represents a breakthrough in terms of quality and user experience. Traditional products, due to their reliance on natural materials and manual processing, have significant quality fluctuations and a mixed bag of quality. However, this plastic pile, through standardized formulations and industrialized production, ensures consistent quality. Its hardness can be flexibly adjusted, eliminating the need for additional sheaths to ensure both training effectiveness and safety. Furthermore, it is lighter, making installation and transportation easier. Furthermore, its use of environmentally friendly materials avoids the resource consumption and hazardous substances associated with traditional materials, aligning with modern green development concepts.

[0167] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A plastic Wing Chun pile, characterized in that: The plastic Wing Chun pile includes a pile body, a pile hand and a pile foot, and the pile body, the pile hand and the pile foot are respectively made by a rotational molding process; The plastic Wing Chun pile includes the following raw materials in parts by weight: 70-85 parts of high-density polyethylene (HDPE); 15-30 parts of linear low-density polyethylene (LLDPE); 5 to 10 parts of ethylene vinyl acetate copolymer EVA; 0.5-1.5 parts of hindered amine light stabilizer HALS; 2 to 4 parts of UV shielding agent; 0.3-0.8 parts of antioxidant; 0.5-1.0 parts of lubricant; 2 to 5 parts of compatibilizer; Among them, the lubricant is PE wax, the compatibilizer is MAH-g-PE, the antioxidant is antioxidant 1010 and antioxidant 168 compounded in a ratio of 1:1, and the ultraviolet shielding agent is carbon black masterbatch.

2. A plastic Wing Chun pile according to claim 1, characterized in that: The plastic Wing Chun pile includes the following raw materials in parts by weight: 77 parts of high-density polyethylene (HDPE); 22 parts of linear low-density polyethylene LLDPE; 7 parts of ethylene vinyl acetate copolymer EVA; 1 part of hindered amine light stabilizer HALS; 3 parts of UV shielding agent; 0.5 parts of antioxidant; 0.7 parts of lubricant; 3.5 parts of compatibilizer.

3. The plastic Wing Chun pile according to claim 1, characterized in that: The plastic Wing Chun pile includes the following raw materials in parts by weight: 82 parts of high-density polyethylene (HDPE); 18 parts of linear low-density polyethylene (LLDPE); 6 parts of ethylene vinyl acetate copolymer EVA; 1.2 parts of hindered amine light stabilizer HALS; 2.5 parts of UV shielding agent; 0.6 parts of antioxidant; 0.8 parts of lubricant; 4 parts of compatibilizer.

4. The plastic Wing Chun pile according to claim 1, characterized in that: The plastic Wing Chun pile includes the following raw materials in parts by weight: 72 parts of high-density polyethylene (HDPE); 28 parts of linear low-density polyethylene LLDPE; 9 parts of ethylene vinyl acetate copolymer EVA; 0.8 parts of hindered amine light stabilizer HALS; 3.5 parts of UV shielding agent; 0.4 parts of antioxidant; 0.6 parts of lubricant; 3.0 parts of compatibilizer.

5. A plastic Wing Chun pile according to any one of claims 1 to 4, characterized in that: The preparation method of the plastic Wing Chun pile comprises the following steps: S1. Raw material pretreatment Add high-density polyethylene, linear low-density polyethylene and ethylene-vinyl acetate copolymer into the drying equipment and dry them at 75-85°C and vacuum degree of -0.07 to -0.09 MPa for 2.5 to 3.5 hours, controlling the moisture content of the raw materials to ≤0.05%; Add the dried raw materials, compatibilizer and lubricant into a high-speed mixer, mix them at a speed of 400-600 r / min for 1.5-3 minutes, then at a speed of 1500-2000 r / min for 4-6 minutes, finally add carbon black masterbatch, light stabilizer and antioxidant, and mix them at a speed of 1800-2200 r / min for 3-5 minutes to obtain a premix; S2. Melt blending and granulation The premix is ​​added to a twin-screw extruder, and the temperature of the extruder from the feeding section to the die head is 135-150°C, 155-170°C, 170-185°C, 180-195°C, 190-200°C, 195-205°C, 190-200°C, and 185-195°C, the screw speed is 300-400r / min, the feeding speed is 20-30r / min, the vacuum degree is -0.05 to -0.07MPa, and after water cooling and pelletizing, pellets with a particle size of 2.5-3.5mm and a length of 3-5mm are obtained; S3.Rotational molding Put the pellets into the Wing Chun pile split mold, preheat the mold to 80-120℃ and keep it for 10-15 minutes; start the double-axis rotational molding machine, control the mold revolution speed to 5-10r / min and rotation speed to 3-7r / min, first heat it to 170-180℃ at a rate of 15-20℃ / min, keep it warm for 25-35 minutes, then heat it to 180-190℃ and keep it for 5-10 minutes; S4. Cooling and demoulding Stop heating, keep the mold rotating and cool naturally for 15-25 minutes to 100-120℃, then force-cool to ≤60℃ at a wind speed of 4-8m / s, open the mold and take out the crude product; S5. Post-processing The rough products are trimmed to control the residual thickness of the flash to ≤0.3mm, and the dimensional deviation is: pile height 1600±1.5mm, diameter 320-350±2.0mm; use a 5-8bar high-pressure water gun to clean at 40-60℃ for 30-60 seconds, spray with a 0.1-0.2mm thick fluorocarbon coating after drying, and dry at 60-80℃ for 20-40 minutes; S6. Assembly and testing Connect the pile body, pile arm and pile foot, and test the finished product to have a Shore hardness of 58-63D, a tensile strength of ≥25MPa, and an impact strength of ≥90kJ / m².

6. The plastic Wing Chun pile according to claim 5, characterized in that: The aspect ratio L / D of the twin-screw extruder in step S2 is 36:1-48:1, and the melt flow rate of the pellets is 1.0-2.5 g / 10 min.

7. The plastic Wing Chun pile according to claim 5, characterized in that: The mold in step S3 is made of aluminum alloy, the cavity surface roughness Ra is 0.8-1.6 μm, and the feeding amount is calculated according to the mold volume × 0.94-0.96 g / cm³ × 1.05-1.15 shrinkage coefficient.

8. The plastic Wing Chun pile according to claim 5, characterized in that: The solid content of the fluorocarbon coating in step S5 is 45% to 55%, and the coating is sprayed at a pressure of 0.25-0.4 MPa and a spraying distance of 150 to 250 mm.

9. The plastic Wing Chun pile according to claim 5, characterized in that: The weather resistance test in step S6 adopts a xenon lamp aging test under the conditions of 300-400nm ultraviolet light, 60±5°C, and 80±5% humidity, and there is no cracking or powdering after 1000 hours.

10. The plastic Wing Chun pile according to claim 5, characterized in that: The pile body adopts a cylindrical structure, and the mold size is designed according to ergonomics. The pile body height is 160cm and the diameter is 30-35cm. The bottom of the pile body is designed with a reserved slot to match the base installation, and the pile body is reserved with reserved holes for the pile hand and pile foot to insert and position the installation. The pile handle is designed to be conical, with an insert rod integrally formed on the pile handle and inserted into the reserved hole. The insert rod is provided with a positioning groove that cooperates with the clamping rod to position the pile handle on the pile body. The pile foot adopts a solid or 8-10mm thick-walled L-shaped structure. The pile foot is also integrally formed with a plug rod inserted into the reserved hole. The plug rod is also provided with a positioning groove that cooperates with the clamping rod to position the pile hand on the pile body.

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