Micro-quantitative glue injection process
By designing a micro-quantitative dispensing device made of high-molecular-weight polypropylene, the problems of high cost and difficult cleaning of existing micro-injectors have been solved, enabling precise micro-quantitative dispensing of high-viscosity adhesives and ensuring the consistency of adhesive spot size and the stability of the dispensing process.
Patent Information
- Application Number
- CN202411664435.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2044-11-20
AI Technical Summary
Existing micro-syringes are expensive, difficult to clean, and unsuitable for high-viscosity adhesives, making it difficult to achieve high-precision adhesive operations.
A micro-quantitative dispensing process is designed, employing a micro-quantitative dispensing device made of high-molecular-weight polypropylene, including a dispensing cylinder and a dispensing pusher. The dispensing cylinder has a dispensing cavity and a dispensing vent hole inside, and its outer wall is engraved with precise graduations. It is fixed to an optical instrument through a threaded connection to achieve precise control of the dispensing volume.
It achieves low-cost, easy-to-clean, and precise micro-quantity dispensing of high-viscosity adhesives, avoiding the influence of air bubbles and ensuring the consistency of adhesive spot size and the stability of the dispensing process.
Smart Images
Figure CN119426130B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the bonding support technology in optical precision machinery engineering, and in particular to a micro-quantitative glue injection process. BACKGROUND
[0002] The bonding support mode is widely used in optical instruments due to its advantages of simple and compact connection system structure, uniform stress distribution and good temperature adaptability without additional connecting parts. In the design process of optical instruments, the support structure of mirrors and lenses is always the focus and difficulty of structural design. Most of the structural adhesives used have shrinkage during curing, and the shrinkage and change of mechanical properties of the structural adhesive will cause internal stress, which will cause deformation of the optical surface, which directly affects the surface shape and position accuracy of the optical instrument mirror, and further affects the imaging quality of the whole machine.
[0003] In order to reduce the adverse effects of shrinkage of the structural adhesive during curing on the surface shape of the optical element, the following principles should be followed during glue bonding: under the condition of meeting the bonding strength, the bonding area is as small as possible, and the bonding area should be as far away from the mirror surface as possible. Non-continuous adhesive rings or adhesive spots should be uniformly arranged on the circumference, and the size and thickness of the adhesive rings or adhesive spots should be as consistent as possible.
[0004] During the assembly stage, due to the particularity and complexity of the glue bonding process, it not only directly affects the initial assembly performance of the product, but also affects the maintainability of the assembly performance, so the strict control of the glue bonding process and the continuous optimization of the process method are needed, which has a significant influence on the protection and improvement of the glue bonding assembly performance.
[0005] The existing glue injection tool is a one-piece micro-syringe, as shown in Figure 1 The barrel of the micro-syringe is made of glass, and the needle aperture is Φ(0.1-0.5)mm. Such a micro-syringe is high in cost, and the residual adhesive in the barrel is not easy to clean when it is repeatedly used. In addition, due to the small aperture of the one-piece needle, the micro-syringe is only suitable for glue injection operation of low-viscosity adhesive, and is not suitable for high-viscosity adhesive which also needs high-precision glue injection. Usually, other non-standard tools are used for glue injection, and it is difficult to control the glue injection quality. SUMMARY
[0006] The purpose of the present application is to solve the technical problems of high cost, difficult cleaning and unsuitable for high-viscosity adhesive in the prior art, and to provide a micro-quantitative glue injection process.
[0007] In order to achieve the above-mentioned purpose, the technical solution provided by the present application is as follows:
[0008] A micro-quantitative glue injection process, characterized by comprising the following steps:
[0009] S1, preparing a micro-quantitative glue injection device according to the glue injection requirement;
[0010] The micro-quantitative glue injection device comprises a glue injection cylinder and a glue injection push rod;
[0011] The inside of the glue injection cylinder is provided with a glue injection cavity; the glue injection push rod is movably inserted into the glue injection cavity from one end of the glue injection cylinder, and the length of the glue injection push rod is greater than that of the glue injection cylinder; the end of the glue injection push rod located in the glue injection cavity is provided with a push rod piston, and the outer diameter of the push rod piston is matched with the inner diameter of the glue injection cavity; the end of the glue injection cylinder close to the end connected with the glue injection push rod is provided with a glue injection and exhaust hole penetrating through the inside and outside; the other end of the glue injection cylinder is provided with an external thread for cooperating with a glue injection threaded hole of the optical instrument to be glued to form a seal;
[0012] The glue injection cylinder is made of a transparent high polymer material, and a scale is arranged on the outer wall of the glue injection cylinder;
[0013] S2, processing the glue injection hole of the optical instrument to be glued into a glue injection threaded hole;
[0014] S3, glue preparation and bubble elimination
[0015] The glue is prepared according to the glue ratio requirement, and the bubbles in the glue are eliminated;
[0016] S4, glue injection into the glue injection cylinder
[0017] The glue prepared by eliminating the bubbles is injected into the glue injection cavity by using a syringe with a glue injection needle until the glue injection cavity is filled with the glue; the injection direction is from the other end of the glue injection cylinder to the end; the filling standard is that the glue is in a critical state of seeping out of the glue injection and exhaust hole;
[0018] The size of the glue injection needle is smaller than that of the glue injection cavity and can smoothly inject the glue into the glue injection cavity;
[0019] S5, glue injection amount calculation
[0020] The glue injection amount of the glue is calculated according to the required glue spot parameters and the size of the glue injection threaded hole of the optical instrument to be glued;
[0021] S6, glue injection
[0022] The external thread is screwed into the glue injection threaded hole of the optical instrument to be glued and fastened, the glue injection push rod is pushed, the glue is injected into the glue injection threaded hole, and the scale of the glue injection cylinder is observed;
[0023] After the glue injection push rod is pushed into the glue injection amount obtained in step S5, the glue injection of the glue injection threaded hole is completed; at this time, the external thread is unscrewed from the glue injection threaded hole which has completed the glue injection, and the micro-quantitative glue injection device can be disassembled;
[0024] S7, returning to step S5, calculating the glue injection amount required by the next glue injection threaded hole to be injected, and judging whether the remaining glue in the glue injection cavity of the micro-quantitative glue injection device can meet the glue injection amount, if yes, continuing to execute step S6; if no, discarding the micro-quantitative glue injection device, replacing a new micro-quantitative glue injection device, and returning to step S4; until all glue injection threaded holes are completed.
[0025] Further, in step S1, a limiting boss is arranged on the outer wall of the glue injection cylinder at a position close to the glue injection threaded hole of the optical instrument to be injected.
[0026] Further, in step S1, the minimum accuracy of the scale is 1 μl.
[0027] Further, in step S1, the glue injection threaded hole has two glue injection exhaust holes symmetrically arranged along the outer wall of the glue injection cylinder.
[0028] Further, in step S1, the outer diameter of the glue injection push rod is smaller than the outer diameter of the push rod piston; the other end of the glue injection push rod is provided with a push handle; and the outer periphery of one end of the glue injection cylinder is provided with a support plate.
[0029] Further, in step S1, the inner diameter of the glue injection cavity is 0.5-2 mm; and the diameter of the glue injection exhaust hole is 0.2-0.4 mm.
[0030] Further, in step S1, the glue injection cylinder and the glue injection push rod are both made of high molecular polypropylene material.
[0031] Further, in step S3, the method for eliminating the bubbles in the glue is to wait for the bubbles to be eliminated by themselves after the glue is prepared, or to use a bubble-eliminating device to eliminate the bubbles.
[0032] The present application has the following beneficial effects compared with the prior art:
[0033] 1. The micro-quantitative glue injection process provided by the present application designs a special micro-quantitative glue injection device made of high molecular polypropylene material, which is low in cost, strong in adaptability, and will not chemically react with common optical glue; and due to the low cost, the device can be used as a disposable glue injection tool, thereby solving the problems of high cost and difficult cleaning, and facilitating operation and ensuring pollution-free glue injection of the glue.
[0034] 2. The micro-quantitative glue injection process provided by the application adopts a glue injection device made of high-molecular polypropylene material, the glue injection cylinder of which has high transparency, and clear and accurate scale lines (with a minimum accuracy of 1 ul) are printed on the cylinder body, so that accurate micro-quantitative glue injection of high-viscosity adhesive can be realized; in addition, the glue injection and glue filling processes are visualized, and whether the glue solution of the adhesive contains air bubbles can be directly observed, so that the influence of air bubbles that have not been removed can be effectively avoided.
[0035] 3. The micro-quantitative glue injection process provided by the application processes the original glue injection hole into a glue injection threaded hole, and the glue injection device adopted is designed with external threads matched with the instrument glue injection threaded hole, that is, the two are connected through thread cooperation, and stable and glue overflow prevention can be achieved during the glue injection process.
[0036] 4. The micro-quantitative glue injection process provided by the application has simple steps, easy operation, and strong universality and feasibility. BRIEF DESCRIPTION OF DRAWINGS
[0037] Figure 1 is a structural schematic diagram of an existing micro-syringe;
[0038] Figure 2 is a principle diagram of an embodiment of the micro-quantitative glue injection process of the application;
[0039] Figure 3 is a structural schematic diagram of the micro-quantitative glue injection device adopted in the embodiment of the application.
[0040] The following is a brief description of the drawings:
[0041] 1-glue injection cylinder, 101-glue injection cavity, 102-glue filling and air venting hole, 103-external thread, 104-limiting boss, 105-branch plate; 2-glue injection push rod, 201-push rod piston, 202-push handle. DETAILED DESCRIPTION
[0042] The specific technical solutions in the embodiments of the application will be further described below with reference to the drawings.
[0043] Since the existing micro-syringe has limited application range and high cost, a high-precision glue injection device is needed in the glue injection process, and the glue injection amount is accurately controlled to control the glue sticking parameters.
[0044] The application can strictly control the glue injection amount through precise scale and transparent cylinder body direct observation, so as to ensure the consistency of the glue spot size of the adhesive in the optical element gluing process; in addition, the device adopted can remove air bubbles in the adhesive as needed during use, and has strong adaptability to different types of adhesives.
[0045] For example, Figure 2As shown, the embodiment of the present application provides a micro-quantitative glue injection process, which specifically comprises the following steps:
[0046] S1, device preparation
[0047] According to the glue injection needs, a micro-quantitative glue injection device is prepared.
[0048] Figure 3 A micro-quantitative glue injection device used in the embodiment of the present application comprises a glue injection cylinder 1 and a glue injection push rod 2. The inside of the glue injection cylinder 1 is provided with a glue injection cavity 101, and the glue injection push rod 2 is movably inserted into the glue injection cavity 101 from one end of the glue injection cylinder 1. The inner diameter of the glue injection cavity 101 is 0.5-2 mm.
[0049] The glue injection cylinder 1 and the glue injection push rod 2 are made of high-molecular polypropylene, which is low in cost and has good transparency and adaptability.
[0050] The length of the glue injection push rod 2 is greater than that of the glue injection cylinder 1. The end of the glue injection push rod 2 located in the glue injection cavity 101 is provided with a push rod piston 201, the outer diameter of the push rod piston 201 is matched with the inner diameter of the glue injection cavity 101, and the outer diameter of the glue injection push rod 2 is smaller than that of the push rod piston 201.
[0051] The end of the glue injection cylinder 1 close to the connection position of the glue injection push rod 2 is provided with two inner-outer through glue filling and air exhaust holes 102, which are used for exhausting air during glue filling to avoid the difficulty in glue injection caused by the small cavity. The diameter of the glue filling and air exhaust hole 102 is 0.2-0.4 mm, and the two glue filling and air exhaust holes 102 are symmetrically arranged along the outer wall of the glue injection cylinder 1.
[0052] The outer periphery of the other end of the glue injection cylinder 1 is provided with an external thread 103, which is used for cooperating with the glue injection threaded hole of the optical instrument to form a seal to prevent glue overflow during glue injection, and the purpose is also to accurately control the glue injection amount.
[0053] The outer wall of the glue injection cylinder 1 is provided with a scale, and the minimum accuracy of the scale is 1 μl, which can accurately control the glue injection amount.
[0054] The outer wall of the glue injection cylinder 1 is provided with a limiting boss 104 on the side of the external thread 103 close to the glue filling and air exhaust hole 102, which is used for abutting with the periphery of the glue injection threaded hole of the optical instrument.
[0055] The other end of the glue injection push rod 2 is provided with a push handle 202, and the outer periphery of one end of the glue injection cylinder 1 is provided with a supporting plate 105, which is used for the operator to hold for convenient glue injection.
[0056] S2, processing threaded hole
[0057] The glue injection hole of the glue injection position of the optical instrument to be injected is processed into a glue injection threaded hole.
[0058] S3, glue preparation and bubble removal
[0059] According to the requirements of the adhesive ratio, the adhesive is prepared, and the bubbles in the adhesive glue solution are eliminated.
[0060] The method for eliminating the bubbles in the adhesive is to wait for the bubbles to be eliminated by themselves after the adhesive is prepared, or to use a bubble-eliminating device to eliminate the bubbles. Other common bubble-eliminating methods can also be used.
[0061] The amount of the prepared adhesive should meet the demand of the total amount of the current injection.
[0062] S4, injecting glue into the glue cylinder
[0063] The adhesive after the bubbles are eliminated is injected into the glue cavity 101 using a syringe with a glue injection needle until the glue cavity 101 is filled with the adhesive; the injection direction is from the other end of the glue cylinder 1 to the end; the filling standard is that the adhesive is in a critical state of seeping out from the glue injection exhaust hole 102;
[0064] The size of the glue injection needle is selected to be smaller than the glue cavity 101 and to be able to smoothly inject the adhesive into the glue cavity 101;
[0065] S5, calculating the injection amount
[0066] According to the required glue spot parameters and the glue injection threaded hole size of the optical instrument to be injected, the injection amount of the adhesive is calculated;
[0067] S6, injecting glue
[0068] The external thread 103 is screwed into the glue injection threaded hole of the optical instrument to be injected, and is tightened, the glue injection push rod 2 is pushed, the adhesive is injected into the glue injection threaded hole, and the scale of the glue cylinder 1 is observed;
[0069] After the adhesive with the injection amount obtained in step S5 is pushed in, the glue injection of the glue injection threaded hole is completed; at this time, the external thread 103 is unscrewed from the glue injection threaded hole that has completed the glue injection, and the micro-quantitative glue injection device can be disassembled;
[0070] S7, returning to step S5, calculating the injection amount required for the next glue injection threaded hole to be injected, and determining whether the remaining adhesive in the glue cavity 101 of the micro-quantitative glue injection device can meet the injection amount:
[0071] If yes, step S6 is continued to be executed;
[0072] If no, the micro-quantitative glue injection device is discarded, a new micro-quantitative glue injection device is replaced, and step S4 is returned to; until all the glue injection threaded holes are completed.
[0073] The above merely illustrates one embodiment of the present application, and is not intended to limit the protection scope of the present application, and any equivalent structural transformation or direct or indirect application in other related technical fields based on the content of the present application and the accompanying drawings are included in the patent protection scope of the present application.
Claims
1. A micro-dispensing process, characterized in that, It comprises the following steps: S1, according to the need of glue injection, prepare micro-quantitative glue injection device; The micro-quantitative glue injection device comprises a glue injection cylinder (1) and a glue injection push rod (2); The inside of the glue injection cylinder (1) is provided with a glue injection cavity (101); the glue injection push rod (2) is movably inserted into the glue injection cavity (101) from one end of the glue injection cylinder (1), and the length of the glue injection push rod (2) is greater than that of the glue injection cylinder (1); one end of the glue injection push rod (2) located in the glue injection cavity (101) is provided with a push rod piston (201), and the outer diameter of the push rod piston (201) is matched with the inner diameter of the glue injection cavity (101); the end of the glue injection cylinder (1) close to the end connected with the glue injection push rod (2) is provided with a glue injection cavity (101) which is connected with the outside and is provided with a glue injection cavity (101); the other end of the glue injection cylinder (1) is provided with an external thread (103) which is matched with the glue injection thread hole of the optical instrument to be glued to form a seal; The glue injection cylinder (1) is made of transparent high polymer material, and the outer wall is provided with a scale; S2, the glue injection hole of the optical instrument to be glued is processed into a glue injection thread hole; S3, glue dispensing and bubble elimination According to the requirements of adhesive proportioning, the adhesive is obtained, and the bubbles in the adhesive liquid are eliminated; S4, glue injection cylinder glue filling The glue injection needle of the syringe is used to fill the glue injection cavity (101) with the glue after the bubbles are eliminated, until the glue injection cavity (101) is filled with glue; the filling direction is: from the other end of the glue injection cylinder (1) to the end; the filling standard is: until the glue is in the critical state of seeping out from the glue injection exhaust hole (102); The glue injection needle is selected to be smaller than the glue injection cavity (101) and can smoothly inject the glue into the glue injection cavity (101); S5, glue injection amount calculation According to the required glue spot parameters and the size of the glue injection thread hole of the optical instrument to be glued, the glue injection amount of the adhesive is calculated; S6, glue injection The external thread (103) is screwed into the glue injection thread hole of the optical instrument to be glued and fastened, the glue injection push rod (2) is pushed, the adhesive is injected into the glue injection thread hole, and the scale of the glue injection cylinder (1) is observed; After the adhesive of the glue injection amount obtained in step S5 is pushed in, the glue injection of the glue injection thread hole is completed; at this time, the external thread (103) is unscrewed from the glue injection thread hole which has completed the glue injection, so that the micro-quantitative glue injection device can be removed; S7, return to step S5, calculate the glue injection amount required for the next glue injection thread hole to be glued, and determine whether the remaining adhesive in the glue injection cavity (101) of the micro-quantitative glue injection device can meet the glue injection amount, if yes, continue to execute step S6; if not, discard the micro-quantitative glue injection device, replace a new micro-quantitative glue injection device, and return to step S4; until all the glue injection thread holes are completed.
2. The micro-quantitative glue injection process according to claim 1, wherein: In step S1, a limiting boss (104) is arranged on the outer wall of the glue injection cylinder (1) at a position close to the glue injection exhaust hole (102) on the side of the external thread (103), which is used to abut with the periphery of the glue injection thread hole of the optical instrument to be glued.
3. The micro-quantitative glue injection process according to claim 1, wherein: In step S1, the minimum accuracy of the scale is 1 μl.
4. The micro-quantitative glue injection process according to claim 1, characterized in that: In step S1, the glue injection exhaust hole (102) has two, along the outer wall of the glue injection cylinder (1) symmetrically arranged.
5. The micro-quantitative glue injection process according to any one of claims 1-4, characterized in that: In step S1, the outer diameter of the glue injection push rod (2) is smaller than the outer diameter of the push rod piston (201); the other end of the glue injection push rod (2) is provided with a push handle (202); one end of the glue injection cylinder (1) is provided with a support plate (105) on the outer periphery.
6. The micro-quantitative glue injection process according to claim 5, characterized in that: In step S1, the inner diameter of the glue injection cavity (101) is 0.5-2 mm; the diameter of the glue injection exhaust hole (102) is 0.2-0.4 mm.
7. The micro-quantitative glue injection process according to claim 6, characterized in that: In step S1, the glue injection cylinder (1) and the glue injection push rod (2) are made of high molecular polypropylene material.
8. The micro-quantitative glue injection process according to claim 1, characterized in that: In step S3, the method for eliminating the air bubbles in the glue is to place the glue after glue preparation and wait for the air bubbles to be eliminated by itself, or use a bubble-removing device to eliminate the air bubbles.
Citation Information
Patent Citations
Universal glue extrusion gun for hard shell and soft film packages
CN107457160A
Glue injection repairing method and glue injection device for abnormal sound of pipe spacer of graphite shell-and-tube heat exchanger
CN115138539A