Fastener mistake-proof storage and transportation tool, method and preparation process based on bi-component silica gel

Abstract

The invention discloses a fastener mistake-proof storage and transportation tool based on bi-component silica gel, the tool comprises a tool body made of bi-component silica gel, and the upper surface of the tool body is provided with at least three placement areas used for storing gaskets, nuts and bolts; wherein the placing areas for storing the washers are provided with positioning columns, the positioning columns are in interference fit with the inner diameters of the washers, and random positioning grooves are formed in the placing areas for storing the nuts and the nuts, so that one parts of the bolts and the nuts are embedded in the random positioning grooves, and the other parts of the bolts and the nuts protrude out of the upper surface of the tool body for taking. The invention further discloses a mistake-proofing method using the fastener mistake-proofing storage and transportation tool based on the two-component silica gel and a preparation process of the fastener mistake-proofing storage and transportation tool based on the two-component silica gel, the problems that the fastener storage and transportation quality is poor and the efficiency is low are effectively solved, and the fastener mistake-proofing storage and transportation tool based on the two-component silica gel is suitable for popularization and application. According to the tool, transportation damage is remarkably reduced, the assembly efficiency is improved, wrong assembly and neglected assembly are eradicated, and meanwhile low-cost and easy-to-maintain industrial application is achieved.

Description

Technical Field

[0001] This invention relates to the field of fastener storage and transportation protection technology for rail transit, and particularly to a fastener error-proof storage and transportation tooling, method, and preparation process based on two-component silicone. Background Technology

[0002] In the rail transit industry, fasteners are critical connecting components, and their transportation and assembly quality directly affects train safety. Currently mainstream tooling such as plastic box tooling, foam board tooling, and nylon box tooling all have significant defects:

[0003] First, the protective performance is insufficient: small fasteners shake and bump inside the deep plastic box, while large fasteners are placed tightly on the black rubber pad, resulting in surface damage and varying degrees of transportation damage.

[0004] Secondly, the assembly efficiency is low: the labels contain redundant information such as project and workstation, and the operator needs to manually check the quantity, which takes about 5 minutes each time, and the problem of incorrect or missing fasteners occurs from time to time.

[0005] In addition, there are limitations in the materials: foam board tooling has low strength and a service life of less than 1 month; nylon tooling has high cost and long production cycle, and cannot be quickly changed, making it unsuitable for the small-batch, multi-project characteristics of rail transit manufacturing, and neither can solve the requirements for conformal protection and error prevention of fasteners.

[0006] Existing tooling has not achieved coordinated optimization of "material properties-structural design-operation efficiency", and in particular lacks flexible protection schemes and error prevention designs for fastener size differences, making it difficult to meet the stringent requirements of the rail transit industry for fastener safety and assembly accuracy. Summary of the Invention

[0007] The purpose of this invention is to overcome the defects of the existing technology and provide a fastener error-proof storage and transportation tooling, method and preparation process based on two-component silicone. First, it is used to solve the problem of poor quality of fastener storage and transportation in rail transit.

[0008] Secondly, there are problems with incorrect or missing fasteners, resulting in low assembly efficiency.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] The fastener error-proof storage and transportation tooling based on two-component silicone disclosed in this invention includes:

[0011] The tooling body of the two-component silicone has at least three placement areas on its upper surface for storing gaskets, nuts and bolts;

[0012] The area for storing washers has a positioning post that is interference-fitted with the inner diameter of the washer. The areas for storing nuts and bolts are formed with conformal positioning grooves, so that a portion of the bolt and nut is embedded in the conformal positioning groove and a portion protrudes from the upper surface of the tooling body for retrieval.

[0013] Furthermore, in the bolt storage area, the conformal positioning grooves are arranged in an alternating pattern, with one bolt placed in each conformal positioning groove.

[0014] Furthermore, in the nut storage area, multiple nuts are placed in the conformal positioning groove, and the multiple nuts are arranged coaxially.

[0015] Furthermore, isolation strips are formed between different types of positioning slot areas and positioning post areas within the placement area to separate the fasteners in the two areas, and labels are affixed to the isolation strips.

[0016] Furthermore, the width of the isolation strip is 5-10mm.

[0017] Furthermore, the conformal positioning groove has a bottom wall, and the depth of the conformal positioning groove is less than the radial outer contour radius of the fastener.

[0018] Furthermore, the height of the positioning post is 1.2-1.5 times the thickness of the gasket.

[0019] The invention utilizes the above-described error-proof storage and transportation tooling for fasteners based on two-component silicone. The method employs labels affixed to the isolation strip of the tooling body, with the labels indicating the material number, total quantity, number of rows, and quantity per row.

[0020] The number of fasteners is visually represented by the number of rows multiplied by the number of fasteners per row.

[0021] The number of rows and the quantity per row of the positioning posts and conformal positioning slots in each placement area correspond to the label information.

[0022] The invention discloses a manufacturing process for a fastener error-proof storage and transportation tooling based on two-component silicone, comprising the following steps:

[0023] The two-component food-grade liquid silicone A and B components are mixed in a 1:1 ratio and then poured into layers to form the final product.

[0024] First layer initial setting and positioning: Pour 3-5mm thick silicone into the tooling tray, let it stand for 2 hours at 23±2℃ until the surface is initially set, and the first layer of the tooling body is formed;

[0025] Second layer overall curing: Fasteners are placed according to the zone layout, silicone column molds are inserted, and secondary pouring is carried out to a total thickness of 5-8mm. After standing for 4 hours, the tooling body is fully cured and the overall shape is set.

[0026] Post-fixing processing of tooling body: Remove fasteners and implanted silicone pillar molds, and form conformal positioning grooves and positioning pillars at the positions of fasteners and silicone pillar molds.

[0027] Furthermore, the two-component silicone has a 1:1 mass ratio of component A to component B, a hardness of 30±5 degrees, and is calculated per 100g component. Component A includes 70-80g of vinyl silicone oil, 5-10g of hydrophobically modified nano-silica, 0.05-0.1g of platinum catalyst, 0.01-0.05g of alkynyl alcohol inhibitor, 0.1-0.3g of dispersant, 0.1-0.5g of pigment, and 0-4.79g of inert dimethyl silicone oil. Component B includes 10-15g of hydrogen-containing silicone oil, 0.05-0.2g of silane coupling agent, 0.01-0.03g of synergistic inhibitor, and 84.77-89.94g of inert dimethyl silicone oil.

[0028] The above technical solution offers the following benefits: First, the tooling body features a refined partitioned design with shim placement area, nut placement area, and bolt placement area. This is combined with silicone pillar positioning and shim interference fit, staggered arrangement of bolt conformal positioning grooves, and uniform nut placement. Second, the addition of error-proof labels in the error-proofing method enables conformal protection and visual management of fasteners. Furthermore, the manufacturing process employs layered casting molding, ensuring accurate fastener positioning and easy removal. Tests show that this tooling can reduce transportation damage by more than 99%, eliminate the risk of mis-installation or omission, and reduce costs by 90% compared to traditional tooling. It is suitable for industrialized scenarios in rail transit equipment manufacturing. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0030] Figure 1 This is a schematic diagram of the overall structure of the fastener error-proof storage and transportation tooling based on two-component silicone disclosed in this invention;

[0031] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0032] Figure 3 This is a schematic diagram of the label error prevention method disclosed in this invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Tooling body; 2. Positioning post; 3. Conformal positioning groove; 4. Conformal positioning groove; 5. Positioning post area; 6. Positioning groove area; 7. Label; 71. Material number label; 72. Total quantity; 73. Number of rows; 74. Quantity per row. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] See Figure 1 , 2 As shown;

[0037] An invention relates to a fastener error-proof storage and transportation tooling based on two-component silicone, comprising:

[0038] The tooling body 1 of the two-component food-grade liquid silicone has at least three placement areas on its upper surface: placement area a, placement area b, and placement area c, which are used to store gaskets, nuts, and bolts, respectively.

[0039] The placement area for storing washers has a positioning post 2, which is interference-fitted with the inner diameter of the washer. The height of the positioning post 2 is 1.2-1.5 times the thickness of the washer. The placement areas for storing nuts and bolts are formed with conformal positioning grooves 3 and 4, so that a portion of the bolt and nut is embedded in the conformal positioning groove, and a portion protrudes from the upper surface of the tooling body 1 for retrieval.

[0040] The bolt storage area has 4 conformal positioning grooves arranged alternately, with one bolt placed in each groove. The distance between adjacent threads is ≥2mm. The nut storage area has 3 conformal positioning grooves containing multiple nuts, which are arranged coaxially. In other words, the nuts are placed in the same direction, and the bottom surface is completely in contact with the silicone surface to prevent tilting and displacement.

[0041] Preferably, an isolation strip is formed between different types of positioning groove areas 6 and positioning post areas 5 in the placement area to separate the fasteners in the two areas and prevent mixing. The isolation strip is labeled with a label 7 and the width of the isolation strip is 5-10mm.

[0042] Preferably, the conformal positioning grooves 3 and 4 have a bottom wall. That is, the positioning groove is a blind groove, which supports the bolt and nut by the bottom wall and protects the bottom of the bolt and nut from wear. Specifically, the positioning groove for placing the bolt includes a retaining groove and a supporting groove. The supporting groove conforms to the bolt shank, and the retaining groove conforms to the bolt nut. The depth of the conformal positioning grooves 3 and 4 is less than the radial outer contour radius of the fastener. That is, the depth of the conformal positioning groove is less than the radius of the nut and bolt head, which makes it easy to remove the nut and bolt during use.

[0043] Instructions for using this two-component silicone-based fastener error-proof storage and transportation tooling:

[0044] First, the tooling body 1 is transported along with the material cart and placed on the material cart pallet;

[0045] The warehouse disassembles fasteners according to workstation requirements, arranges them into tooling units according to zoning rules, and affixes error-proof labels; logistics personnel quickly verify materials using labels and isolation strips to avoid mis-materials; operators directly retrieve and install materials, and after completion, check for omissions by checking empty spaces in the tooling unit, improving efficiency by 50%;

[0046] See Figure 1 , 3 As shown:

[0047] The invention utilizes the above-mentioned error-proofing storage and transportation tooling based on two-component silicone fasteners. The method is as follows: a label 7 is affixed to the isolation strip of the tooling body 1. The label 7 is marked with the material number 71, the total quantity 72, the number of rows 73 and the quantity per row 74. The font height is ≥5mm. A QR code is affixed to the isolation strip. Scanning the code can view the assembly instructions.

[0048] The number of fasteners is visually presented by arranging 73 rows × 74 items per row, reducing the verification time to within 10 seconds, achieving both error prevention and visualization;

[0049] The number of rows and the quantity per row of the positioning posts 2 and the conformal positioning slots 3 and 4 in each placement area correspond to the information on label 7;

[0050] Of course, you can also fill in other information on label 7, such as project name, project number, workstation used, etc.

[0051] See Figure 1 , 2 As shown:

[0052] The invention discloses a manufacturing process for a fastener error-proof storage and transportation tooling based on two-component silicone, comprising the following steps:

[0053] The two-component food-grade liquid silicone A and B components are mixed in a 1:1 ratio and then poured into layers to form the final product.

[0054] First layer initial setting and positioning: Pour 3-5mm thick silicone into the tooling tray, let it stand for 2 hours at 23±2℃ until the surface is initially set, and the first layer of tooling body 1 is formed;

[0055] Second layer overall curing: Fasteners are placed according to the zone layout, silicone column molds are inserted, and secondary pouring is carried out to a total thickness of 5-8mm. After standing for 4 hours, it is fully cured and the tooling body 1 is shaped as a whole.

[0056] Post-treatment of tooling body 1: Remove the fasteners and the implanted silicone pillar mold. The positions of the fasteners and the silicone pillar mold form conformal positioning grooves 3, 4 and positioning pillars 2.

[0057] After the tooling is made, the fasteners are treated as follows: SP-3230 cleaning agent is used to clean the surface of the fasteners using ultrasonic cleaning. The cleaning parameters are: ultrasonic wave 40kHz, temperature 25℃, time 3min, to ensure that there is no silicone residue on the threads.

[0058] Preferably, the two-component silicone is food-grade liquid silicone. Component A of the two-component food-grade liquid silicone is the base component, and component B is the curing agent component. The mass ratio of component A to component B is 1:1, and the hardness of the two-component food-grade liquid silicone is 30±5 degrees.

[0059] The complete composition of the two components (calculated per 100g of each component) is as follows:

[0060] 1) Component A (base material component, 100g):

[0061] Vinyl silicone oil 70-80g, as a basic elastomer, gives tooling flexibility and structural stability, and prevents tooling from cracking due to vibration during storage and transportation;

[0062] Hydrophobic modified nano silica 5-10g improves the tear strength and surface hardness of tooling, making it suitable for compression and collision scenarios during the storage and transportation of fasteners, while avoiding filler agglomeration that leads to uneven hardness in local tooling.

[0063] Platinum catalyst (Karstedt type) 0.05-0.1g, as curing accelerator, precisely matches the preparation process of "first layer initial setting for 2 hours and second layer curing for 4 hours at 23±2℃", ensuring tooling shaping efficiency and structural stability;

[0064] Add 0.01-0.05g of alkynyl alcohol inhibitor (methylbutynol) to control the curing rhythm after mixing, avoid premature curing of silicone during layered pouring, and ensure processability;

[0065] Dispersant (polyether modified silicone oil) 0.1-0.3g helps to uniformly disperse nano-silica in vinyl silicone oil and prevents filler agglomeration from affecting the surface smoothness and mechanical properties of tooling.

[0066] 0.1-0.5g of pigment is used to distinguish fastener placement areas (such as blue marking bolt areas and yellow marking nut areas), without affecting the elasticity of silicone or food-grade safety;

[0067] Add 0-4.79g of inert dimethyl silicone oil (make up the remainder to 100g), fine-tune the viscosity of component A to match that of component B, and ensure uniform dispersion when components A and B are mixed in a 1:1 ratio to avoid uneven local curing.

[0068] 2) Component B (curing agent component, 100g):

[0069] 10-15g of hydrogen-containing silicone oil is used as a crosslinking agent to provide Si-H bonds to react with the C=C bonds of group A vinyl silicone oil, ensuring the structural stability of the tooling after curing (resistant to storage and transportation vibrations and not easily deformed).

[0070] Silane coupling agent (KH-550) 0.05-0.2g, improves the adhesion between silicone and tooling pallets (such as plastic / metal pallets), prevents tooling displacement during storage and transportation, and does not affect the contact safety between silicone and fasteners;

[0071] Synergistic inhibitor (matched with group A alkynols) 0.01-0.03g, works synergistically with group A inhibitors to extend the shelf life of group B (avoiding deterioration of active ingredients when not in use) and does not interfere with curing efficiency, ensuring complete curing in 4 hours;

[0072] Inert dimethyl silicone oil 84.77-89.94g (make up the remainder to 100g) is used as a dilution carrier for the active ingredients of group B: ① Controlling the concentration of hydrogen-containing silicone oil to avoid excessively rapid reaction that could cause bubbles or cracks in the tooling; ② Adjusting the viscosity of group B to be consistent with that of group A to ensure 1:1 mixing uniformity; ③ Non-reactive, not affecting the final hardness (30±5 degrees) of the tooling and food-grade safety.

[0073] In the above technical solution, the tooling for preparing two-component food-grade liquid silica gel has the following features:

[0074] Protection: Strong wrapping ability, able to conform to the curved surface of fasteners; shock absorption, vibration absorption efficiency is improved by 70%, and the damage rate is reduced by 99% compared to plastic boxes;

[0075] Economic advantages: Low cost per tooling unit, repairable and reusable, quick mold change, reducing costs by 90% compared to nylon tooling;

[0076] Durability: It can self-repair from minor external damage, has a stable structure, and can withstand varying degrees of vibration and compression, increasing its lifespan by 92% compared to foam tooling;

[0077] Safety: Non-toxic and harmless, resistant to chemical corrosion, and meets the environmental protection standards for rail transit;

[0078] In the above technical solution, the error prevention method of the fastener error prevention storage and transportation tooling based on two-component silicone is used, and the error prevention label 7 realizes the shape protection and visual management of the fastener.

[0079] In the above technical solution, the fastener storage and transportation tooling and preparation process based on two-component food-grade liquid silicone, the tooling body 1 has a fine partition design of gasket placement area a, nut placement area b, and bolt placement area c. Combined with silicone column positioning, bolt conformal positioning groove 4 arranged in opposite directions, and the use of anti-mistake labels, the preparation process adopts layered casting molding to ensure that the fastener is accurately positioned and easy to remove.

[0080] Tests show that this tooling can reduce transportation damage by more than 99%, eliminate the risk of mis-loading or omission, and reduce costs by 90% compared to traditional tooling, making it suitable for industrialized applications in rail transit equipment manufacturing. The invention was validated through the following methods:

[0081] 1) Improved protective performance: Verified by vibration test (20Hz, 72h), the surface roughness Ra of the fastener decreased from 3.2μm to 0.8μm, and impact damage was basically eliminated;

[0082] 2) Reduced error prevention efficiency: Visual design reduces the error, omission, and misassembly rates from 8%-10% to below 0.2%;

[0083] 3) Reduced overall cost: Silicone tooling can be repaired and used for more than 5 projects, and the total life cycle cost of a single set is only 1 / 10 of that of nylon tooling;

[0084] 4) Improved environmental safety: Food-grade silicone oil has no silicone oil precipitation (GC-MS detection LOD=0.1μg / g, not detected), and does not affect the performance of threadlocking adhesive (torque test deviation ≤0.1N);

[0085] This tooling significantly reduces transportation damage, improves assembly efficiency, and eliminates misassembly and omissions, while enabling low-cost and easy-to-maintain industrial applications.

[0086] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fastener error-proof storage and transportation tooling based on two-component silicone, characterized in that, include: The tooling body (1) of the two-component silicone has at least three placement areas on its upper surface for storing gaskets, nuts and bolts; The placement area for storing washers has a positioning post (2), which is interference-fitted with the inner diameter of the washer. The placement areas for storing nuts and bolts are formed with conformal positioning grooves (3, 4), so that a portion of the bolt and nut is embedded in the conformal positioning groove (3, 4), and a portion protrudes from the upper surface of the tooling body (1) for retrieval.

2. The fastener error-proof storage and transportation fixture based on two-component silicone according to claim 1, characterized in that: The bolt storage area has staggered locating grooves (4) arranged in opposite directions, with one bolt placed in each locating groove (4).

3. The fastener error-proof storage and transportation fixture based on two-component silicone according to claim 1, characterized in that: The nut storage area has multiple nuts placed in the conformal positioning groove (3), and the multiple nuts are arranged coaxially.

4. The fastener error-proof storage and transportation fixture based on two-component silicone according to any one of claims 1-3, characterized in that: An isolation strip is formed between different types of positioning groove areas (6) and positioning column areas (5) in the placement area to separate the fasteners in the two areas. The isolation strip is labeled (7).

5. The fastener error-proof storage and transportation fixture based on two-component silicone according to claim 4, characterized in that: The width of the isolation strip is 5-10mm.

6. The fastener error-proof storage and transportation fixture based on two-component silicone according to any one of claims 1-3, characterized in that: The conformal positioning grooves (3, 4) have bottom walls, and the depth of the conformal positioning grooves (3, 4) is less than the radial outer contour radius of the fastener.

7. The fastener error-proof storage and transportation fixture based on two-component silicone according to claim 1, characterized in that: The height of the positioning post (2) is 1.2-1.5 times the thickness of the gasket.

8. The error-proofing method using the two-component silicone-based fastener error-proofing storage and transportation tooling according to any one of claims 1-7, characterized in that, include: The method uses a label (7) pasted on the isolation strip of the tool body (1). The label (7) indicates the material number (71), total quantity (72), number of rows (73) and quantity per row (74). The number of fasteners is visually represented by the number of rows (73) × the number of fasteners per row (74); The number of rows and the quantity per row of the positioning posts (2) and conformal positioning slots (3, 4) in each placement area correspond to the label information.

9. A fabrication process for a fastener error-proof storage and transportation tooling based on two-component silicone, characterized in that, Includes the following steps: The two-component silicone A and B components are mixed in a 1:1 ratio and then poured into layers to form the final product. First layer initial setting and positioning: Pour 3-5mm thick silicone into the tooling tray, let it stand for 2 hours at 23±2℃ until the surface is initially set, tooling body (1) first layer forming; Second layer overall curing: Fasteners are placed according to the zone layout, silicone column molds are inserted, and secondary pouring is carried out to a total thickness of 5-8mm. After standing for 4 hours, the tooling body (1) is fully shaped. Tooling body (1) post-forming treatment: take out the fastener and the implanted silicone column mold, the fastener position and the silicone column mold position form conformal positioning groove (3, 4) and positioning column (2).

10. The preparation process of the fastener error-proof storage and transportation tooling based on two-component silicone according to claim 9, characterized in that: The two-component silicone rubber has a component A to component B mass ratio of 1:1 and a hardness of 30±5 degrees. Calculated per 100g component, component A includes 70-80g of vinyl silicone oil, 5-10g of hydrophobically modified nano-silica, 0.05-0.1g of platinum catalyst, 0.01-0.05g of alkynyl alcohol inhibitor, 0.1-0.3g of dispersant, 0.1-0.5g of pigment, and 0-4.79g of inert dimethyl silicone oil. Component B includes 10-15g of hydrogen-containing silicone oil, 0.05-0.2g of silane coupling agent, 0.01-0.03g of synergistic inhibitor, and 84.77-89.94g of inert dimethyl silicone oil.

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