Dispensing process
By calculating the required dispensing amount and performing two sealing operations, the problem of glue leaking after dispensing and sealing of products with large gaps in the prior art is solved, and the product is well-equipped.
Patent Information
- Application Number
- CN202411380202.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-03-21
AI Technical Summary
When the existing dispensing process seals products with large gaps, the glue is easily leaked and cannot meet customers' requirements for airtightness.
By calculating the required amount of glue dispensing, first initially seal and cure the bottom of the gaps of two different materials, and then dispense seal the remaining positions of the gaps to ensure that the sealant fully fills the gaps.
This process effectively seals the larger gap through two dispensing seals, ensuring the airtightness of the product, avoiding the outflow of sealant, and meeting the customer's airtightness requirements.
Smart Images
Figure CN119657440A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of glue dispensing and sealing, and in particular to a glue dispensing process. Background Art
[0002] With the development of automobile electrification and intelligence and the progress of the times, connectors are required to transform and upgrade towards high efficiency, high yield rate and high quality. The connector industry has increasingly stringent requirements on product quality, especially the air tightness of connectors. The original process methods have gradually failed to meet the industry development needs of the new era.
[0003] Especially after the embedded injection molding of hardware, due to the inconsistent cooling speed, gaps are easily generated between the hardware and the plastic. In the past, products were directly sealed by glue dispensing, but for products with larger gaps, the existing glue dispensing process is prone to glue leakage after sealing, and the glue dispensing height cannot meet the set requirements, and the product airtightness cannot meet customer requirements. Summary of the invention
[0004] In view of this, the present invention provides a glue dispensing process to solve the problem that the existing glue dispensing process cannot meet the airtightness requirements when sealing products with large gaps.
[0005] In a first aspect, the present invention provides a dispensing process for dispensing glue to seal a gap between two parts of different materials in a product, comprising:
[0006] Calculate the required dispensing amount;
[0007] Preliminary sealing of the gap opening at the bottom of two parts of different materials by means of sealant and curing;
[0008] After the bottom sealant is cured, apply glue to the rest of the gap to seal it.
[0009] Beneficial effects: The dispensing process first calculates the required dispensing amount to ensure that the sealant can fully fill the gap and ensure airtightness, and then preliminarily seals and solidifies the gap openings at the bottom of two parts of different materials, so that the bottom of the gap is sealed first, and then when dispensing the rest of the gap, the sealant flows from the top opening of the gap to the bottom of the gap under the action of gravity, and when it flows to the bottom of the gap, it will be blocked by the sealant that is preliminarily sealed and solidified, so that the sealant that seals the rest of the gap will not flow out through the opening at the bottom of the gap, thereby ensuring that the calculated dispensing amount can fully fill the gap, the sealing is good, and the airtightness is ensured. The dispensing process is simple and effective. Through two dispensing seals, it can effectively seal larger gaps and ensure the airtightness of the product.
[0010] In an optional embodiment, the sealant at the bottom opening of the gap at least covers a portion of two parts made of different materials.
[0011] Beneficial effect: By allowing the sealant to cover a portion of two components of different materials at the opening of the gap, the sealant of the initial sealing can be firmly connected to the two components of different materials, avoiding separation and falling off between the two components during the dispensing and curing process, thereby ensuring the firmness of the initial sealing.
[0012] In an optional embodiment, the thickness of the sealant at the bottom opening of the gap is 2.1 mm-2.3 mm.
[0013] Beneficial effect: The thickness of the sealant at the bottom opening of the gap is controlled at 2.1mm-2.3mm, which can ensure that the bottom of the gap is firmly sealed. After dispensing glue to other positions in the gap, the sealant at the bottom of the gap can effectively support the uncured sealant in the gap and prevent the sealant from flowing out from the bottom of the gap; at the same time, it can also prevent the sealant at the bottom opening of the gap from being too thick and causing interference to the product, affecting the use or connection of the product.
[0014] In an optional embodiment, calculating the required dispensing amount includes:
[0015] Determine the amount of glue required to seal the product gap through experiments;
[0016] Verify the resulting dispensed quantities.
[0017] Beneficial effect: Through the experiment, the required glue dispensing amount for the gap to meet the airtightness requirements can be accurately obtained, and then the obtained glue dispensing amount can be verified to further ensure the accuracy of the glue dispensing amount obtained in the experiment, so that in the subsequent formal glue dispensing operation, it can be ensured that the airtightness of the product after dispensing meets the requirements and the product yield is ensured.
[0018] In an optional embodiment, before the gap openings at the bottoms of the two components are initially sealed by a sealant, the process further includes:
[0019] Steps for preparation of sealant.
[0020] Beneficial effects: Different products will have components of different materials. According to the materials of the components, the corresponding raw material types and proportions are selected, and after mixing, a sealant is formed, which can effectively seal the gap between the two components and enhance the sealing effect.
[0021] In an optional embodiment, preliminarily sealing the gap openings at the bottoms of the two components with a sealant and curing the sealant comprises:
[0022] Seal the bottom of the gap with a sealant;
[0023] The bottom of the gap is sealed and baked for curing.
[0024] Beneficial effect: After the sealant is prepared, the bottom of the gap is first sealed with the sealant. At this time, the glue is not cured and cannot play a sealing role. Therefore, the sealant at the bottom of the gap is cured by baking, so that the sealant has sufficient structural strength. In the subsequent glue dispensing in the gap, the bottom seal can effectively support the seal and prevent the sealant in the gap from flowing out.
[0025] In an optional embodiment, the baking and curing temperature ranges from 115°C to 125°C.
[0026] Beneficial effect: The baking temperature can quickly cure the sealant without affecting the physical and chemical properties of the sealant after curing, thereby ensuring the sealing effect of the sealant.
[0027] In an optional embodiment, the baking and curing time is 0.5h-1.5h.
[0028] Beneficial effect: Since the thickness of the curing agent at the bottom of the gap is relatively thin, the curing time of the sealant at the bottom of the gap is set to 0.5h-1.5h, which can not only ensure the curing effect of the sealant, but also reduce the duration of the overall sealing operation.
[0029] In an optional embodiment, after the bottom sealant is cured, the remaining positions of the gap are sealed with glue, which includes:
[0030] The sealant in the remaining positions of the gap is baked and cured.
[0031] Beneficial effect: After dispensing glue in the gap, since the bottom has been sealed, the sealant in the gap takes a long time to cure, so the sealant in the gap is cured by baking, and the cured sealant will fill the gap to complete the sealing of the gap.
[0032] In an optional embodiment, the baking and curing time is 1.5h-3h.
[0033] Beneficial effect: Since the gap has a deeper depth and a smaller width, the sealant in the gap takes a longer time to cure. By setting the baking curing time to 1.5h-3h, the curing effect of the sealant in the gap can be effectively guaranteed, the sealing effect of the sealant on the gap can be ensured, and the air tightness of the product can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0035] Figure 1 A flow chart of a dispensing process according to an embodiment of the present invention;
[0036] Figure 2 This is an air tightness test leakage confirmation table according to an embodiment of the present invention. DETAILED DESCRIPTION
[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.
[0038] Combine the following Figure 1 , describing an embodiment of the dispensing process of the present invention.
[0039] According to an embodiment of the present invention, on the one hand, a glue dispensing process is provided for performing glue dispensing and sealing a gap between two components of different materials in a product, including: calculating the required glue dispensing amount; preliminarily sealing the gap opening at the bottom of the two components of different materials with a sealant and curing the sealant; and performing glue dispensing and sealing the remaining positions of the gap after the bottom sealant is cured.
[0040] The dispensing process provided in this embodiment first calculates the required dispensing amount to ensure that the sealant can fully fill the gap and ensure airtightness, and then the gap opening at the bottom of the two different material parts is initially sealed and cured, so that the bottom of the gap is sealed first, and then when dispensing the remaining positions of the gap, the sealant flows from the top opening of the gap to the bottom of the gap under the action of gravity, and when it flows to the bottom of the gap, it will be blocked by the sealant that is initially sealed and cured, so that the sealant that seals the remaining positions in the gap will not flow out through the opening at the bottom of the gap, thereby ensuring that the calculated dispensing amount can fully fill the gap, the sealing is good, and the airtightness is ensured. The dispensing process is simple and effective. Through two dispensing seals, it can effectively seal larger gaps and ensure the airtightness of the product.
[0041] The product of this embodiment takes the connector as an example, which includes two parts, a metal fitting and a plastic part. After the metal fitting is embedded and injected, the two parts form a relatively stable structure. However, after cooling, a gap is formed between the metal fitting and the plastic part due to the inconsistent cooling speed. The gap is usually small, between 0.01mm-0.1mm, and the depth of the gap is less than 22.6mm. However, the existence of the gap will affect the sealing of the subsequent connector, so it is necessary to dispense glue at the gap to meet the airtightness requirements. Of course, the method of this embodiment can also be applied to other products that require dispensing and sealing.
[0042] In one embodiment, the sealant at the bottom opening of the gap at least covers a portion of the two parts of different materials. That is, the sealant flows to the surfaces of the hardware and plastic parts on both sides of the gap, and by making the sealant cover a portion of the two parts of different materials at the gap opening, the sealant of the initial sealing can be firmly connected to the two parts of different materials, avoiding separation and falling off between the two parts during the dispensing and curing process, thereby ensuring the firmness of the initial sealing.
[0043] In one embodiment, the thickness of the sealant at the bottom opening of the gap is 2.1mm-2.3mm. Controlling the thickness of the sealant at the bottom opening of the gap to 2.1mm-2.3mm can ensure that the bottom of the gap is firmly sealed. After dispensing glue to other positions in the gap, the sealant at the bottom of the gap can effectively support the uncured sealant in the gap to prevent the sealant from flowing out from the bottom of the gap; at the same time, it can also prevent the sealant at the bottom opening of the gap from being too thick to interfere with the product and affect the use or connection of the product.
[0044] The thickness of the sealant at the bottom opening of the gap is preferably 2.1 mm, 2.2 mm and 2.3 mm.
[0045] In one embodiment, calculating the required glue dispensing amount includes: determining the glue dispensing amount required for sealing the gap of the product through experiments; and verifying the obtained glue dispensing amount. Through the experiment, the required glue dispensing amount for the gap to meet the airtightness requirements can be accurately obtained, and then the obtained glue dispensing amount is verified to further ensure the accuracy of the glue dispensing amount obtained by the experiment, so as to ensure that the airtightness of the product meets the requirements and the product yield after glue dispensing in the subsequent formal glue dispensing operation.
[0046] The glue dispensing amount verified according to the gap size is 0.01g-0.03g, and the preferred glue dispensing amount is 0.01g, 0.02g and 0.03g.
[0047] It can be understood that the above experiment is to perform glue dispensing with different glue dispensing amounts on the same model of products multiple times to find out the glue dispensing amount with the best airtightness after dispensing. This glue dispensing amount can fully fill the gap after curing, so that the airtightness of the product gap meets the requirements.
[0048] In one embodiment, before the gap opening at the bottom of the two components is initially sealed by the sealant, the step of preparing the sealant is also included. Different products may have components of different materials. According to the materials of the components, the corresponding raw agent types and proportions are selected and mixed to form a sealant, which can effectively seal the gap between the two components and enhance the sealing effect.
[0049] In one embodiment, the sealant is of AB glue type, which is a two-component adhesive that hardens after mixing two liquids. There is no restriction on the specific types of the two components, which should be selected based on the specific sealing material and airtightness requirements.
[0050] In one embodiment, the equipment for mixing the sealant uses a screw pump for proportioning, and the screw pump is used to ensure that the weight ratio of the two components is in the range of 100:50±0.25g, wherein the specific type and model of the screw pump should be selected according to the types of actual components.
[0051] In one embodiment, the device for spraying sealant includes a piezoelectric valve, which can accurately control the spraying amount. In this embodiment, the spraying accuracy of the piezoelectric valve is controlled between 0.01g and 0.03g, and the servo motor is used to control the dispensing position to an accuracy of 0.01mm.
[0052] In one embodiment, the device for spraying the sealant further includes an anti-solidification and anti-backflow device to ensure that the sealant flows in the device and ensures its uniformity.
[0053] In one embodiment, the sealant is used to initially seal the gap opening at the bottom of the two components and then solidifies the gap opening, including: sealing the gap bottom with the sealant; and baking and solidifying the gap bottom seal. After the sealant is prepared, the gap bottom is first sealed with the sealant. At this time, the glue is not solidified and cannot play a sealing role. Therefore, the sealant at the bottom of the gap is solidified by baking, so that the sealant has sufficient structural strength. In the subsequent dispensing of glue in the gap, the bottom plugging can effectively support the plugging and prevent the sealant in the gap from flowing out.
[0054] In one embodiment, the baking and curing temperature ranges from 115° C. to 125° C. This baking temperature can quickly cure the sealant and will not affect the physical and chemical properties of the sealant after curing, thereby ensuring the sealing effect of the sealant.
[0055] In one embodiment, the curing time is 0.5h-1.5h. Since the curing agent at the bottom of the gap is thin, the curing time of the sealant at the bottom of the gap is set to 0.5h, which can ensure the curing effect of the sealant and reduce the duration of the overall sealing operation.
[0056] Among them, the time for preliminary sealing baking and curing is preferably 0.5h, 1h and 1.5h.
[0057] In one embodiment, after the bottom sealant is cured, the rest of the gap is sealed by dispensing glue, which includes: baking and curing the sealant in the rest of the gap. After dispensing glue in the gap, since the bottom has been sealed, the sealant in the gap takes a long time to cure, so the sealant in the gap is cured by baking, and the cured sealant will fill the gap to complete the sealing of the gap.
[0058] In one embodiment, the curing time is 1.5 hours to 3 hours. Since the gap has a deeper depth and a smaller width, the curing time of the sealant in the gap is longer. By setting the curing time to 1.5 hours to 3 hours, the curing effect of the sealant in the gap can be effectively guaranteed, the sealing effect of the sealant on the gap can be ensured, and the airtightness of the product can be ensured.
[0059] The time for baking and curing the sealant in the gap is preferably 1.5 h, 2 h, 2.5 h and 3 h.
[0060] Combination Figure 2 It can be seen that among the 25 types of products sealed by the above-mentioned dispensing process, in the airtightness test, the leakage volume meets the airtightness requirements and is much higher than the airtightness standard. The maximum leakage value MAX is 0.003, the minimum leakage value MIN is -0.006, and the average leakage value AVE is -0.0023. According to industry standards or product requirements, the offset σ is 0.0027. According to the standards in the industry, the average value is added or subtracted by three times the offset, and the maximum values are 0.0059 and -0.0105 respectively, which still meet the airtightness standards.
[0061] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.
Claims
1. A glue dispensing process for dispensing glue to seal the gap between two parts of different materials in a product, characterized in that: include: Calculate the required dispensing amount; Preliminary sealing of the gap opening at the bottom of two parts of different materials by means of sealant and curing; After the bottom sealant is cured, apply glue to the rest of the gap to seal it.
2. The dispensing process according to claim 1, characterized in that: The sealant at the bottom opening of the gap covers at least a portion of the two different material components.
3. The dispensing process according to claim 2, characterized in that: The thickness of the sealant at the bottom opening of the gap is 2.1mm-2.3mm.
4. The dispensing process according to claim 1, characterized in that: Calculating the required dispensing volume includes: Determine the amount of glue required to seal the product gap through experiments; Verify the resulting dispensed quantities.
5. The dispensing process according to claim 1, characterized in that: Before the initial sealing of the gap opening at the bottom of the two components by means of a sealant, it also includes: Steps for preparation of sealant.
6. The dispensing process according to any one of claims 1 to 5, characterized in that: The initial sealing of the gap opening at the bottom of the two parts by means of sealant and curing includes: Seal the bottom of the gap with a sealant; Bake and cure the bottom seal of the gap.
7. The dispensing process according to claim 6, characterized in that: The curing temperature range is 115°C to 125°C.
8. The dispensing process according to claim 7, characterized in that: The baking and curing time is 0.5h-1.5h.
9. The dispensing process according to any one of claims 1 to 5, characterized in that: After the bottom sealant is cured, the remaining gaps are sealed with glue, including: The sealant in the remaining positions of the gap is baked and cured.
10. The dispensing process according to claim 9, characterized in that: The baking and curing time is 1.5h-3h.