CN106896036B - A kind of encapsulating adhesive viscosity determining procedure - Google Patents
A kind of encapsulating adhesive viscosity determining procedure Download PDFInfo
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- CN106896036B CN106896036B CN201710024926.8A CN201710024926A CN106896036B CN 106896036 B CN106896036 B CN 106896036B CN 201710024926 A CN201710024926 A CN 201710024926A CN 106896036 B CN106896036 B CN 106896036B
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- 239000000853 adhesive Substances 0.000 title claims abstract description 83
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000004382 potting Methods 0.000 claims abstract description 86
- 238000012360 testing method Methods 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000010998 test method Methods 0.000 abstract description 8
- 239000003973 paint Substances 0.000 abstract description 3
- 239000003292 glue Substances 0.000 description 18
- 238000012512 characterization method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
一种灌封胶粘剂粘度测试方法，首先清洁流动模具装置型腔，在模具、灌封胶粘剂达到热平衡后将灌封胶粘剂灌注到型腔，当胶粘剂液面高度不变或者没有胶粘剂流动时，停止灌注，并等待灌封胶粘剂补缩及固化，最后根据固化后的灌封胶粘剂，量取流动路径长度m、填充半径，进而计算得到灌封胶粘剂粘度，完成灌封胶粘剂粘度测试。本发明与现有的旋转粘度计测试法、涂料粘度测试法和落球粘度计法相比，具有实现简单、直观、实用的优点，更有利于通过该粘度测试数据指导胶粘剂灌封工艺，具有很好的使用价值。
A method for testing the viscosity of a potting adhesive. First, clean the cavity of a flow mold device, pour the potting adhesive into the cavity after the mold and the potting adhesive reach thermal equilibrium, and stop the pouring when the adhesive liquid level remains unchanged or when there is no adhesive flowing. , and wait for the filling and curing of the potting adhesive. Finally, according to the cured potting adhesive, measure the flow path length m and the filling radius, and then calculate the viscosity of the potting adhesive to complete the potting adhesive viscosity test. Compared with the existing rotational viscometer test method, paint viscosity test method and falling ball viscometer method, the invention has the advantages of simple, intuitive and practical realization, is more conducive to guiding the adhesive potting process through the viscosity test data, and has good use value.
Description
技术领域technical field
本发明涉及电子元器件灌封用胶粘剂的粘度测试，特别是一种灌封胶粘剂粘度测试方法。The invention relates to a viscosity test of an adhesive for potting and sealing of electronic components, in particular to a method for testing the viscosity of the potting adhesive.
背景技术Background technique
电子元器件使用胶料进行灌封是制造过程中关键的一步，灌封质量决定了互连的可靠性，不恰当的灌封将导致气泡、填充不实，造成后续工序基材面不完整，以及切割导致金属引线与灌封材料之间的裂缝。电子元器件使用的灌封胶属于粘度较高的液态胶，在常温下流动性较差，很难填充堆叠器件的小间隙，导致固化后胶体表面出现气孔、砂眼等缺陷。The use of glue for potting of electronic components is a key step in the manufacturing process. The quality of potting determines the reliability of interconnection. Improper potting will lead to air bubbles and incorrect filling, resulting in incomplete substrate surface in subsequent processes. As well as cutting resulting in cracks between the metal leads and the potting material. The potting glue used for electronic components is a liquid glue with high viscosity, which has poor fluidity at room temperature and is difficult to fill in the small gaps of stacked devices, resulting in defects such as pores and blisters on the surface of the colloid after curing.
灌封质量与灌封胶、灌封方法有关。表征灌封胶重要的工艺参数就是其特定温度下的粘度，其数值与流动性密切相关。电子元器件厂家一般通过工艺试验，明确灌封胶实施的工艺路线。因此，如何将灌封胶的粘度数据，直接与灌封胶的流动能力相结合，就是亟需要解决的工艺问题。The quality of potting is related to the potting glue and potting method. An important process parameter to characterize the potting compound is its viscosity at a specific temperature, and its value is closely related to its fluidity. Electronic component manufacturers generally clarify the process route of potting glue implementation through process tests. Therefore, how to directly combine the viscosity data of the potting glue with the flowability of the potting glue is a process problem that needs to be solved urgently.
目前常用的粘度表征方法有如下几种：1)旋转粘度计法：圆柱形或者圆盘形的转子在待测样品中以恒定的速率旋转，由于待测样品的粘度对于转子运行的阻力导致产生粘性力矩，使弹性元件偏转产生扭矩，当粘性力矩与偏转力矩平衡时，通过测量弹性元件的偏转角度计算待测样品的粘度；2)涂料粘度测试法：涂-1、涂-4粘度计测定的粘度是条件粘度，通过公式可将流出时间换算成运动粘度值厘斯(mm2/s)；3)落球粘度计法：落球粘度计测定的粘度是条件粘度，即一定温度下钢球垂直下落通过盛有试样的玻璃管上、下两刻度所需要的时间，以秒(s)表示。At present, the commonly used viscosity characterization methods are as follows: 1) Rotational viscometer method: The cylindrical or disc-shaped rotor rotates at a constant speed in the sample to be tested, and the viscosity of the sample to be tested causes the resistance of the rotor to run. Viscous moment, the elastic element is deflected to generate torque. When the viscous moment is balanced with the deflection moment, the viscosity of the sample to be tested is calculated by measuring the deflection angle of the elastic element; 2) Coating viscosity test method: measured by Tu-1 and Tu-4 viscometers 3) Falling ball viscometer method: The viscosity measured by the falling ball viscometer is the conditional viscosity, that is, the steel ball falls vertically at a certain temperature The time required to pass the upper and lower graduations of the glass tube containing the sample is expressed in seconds (s).
上述常用的粘度测试和表征方法，均与灌封胶粘剂真实的使用工况相去甚远。因此，需要研发一种与实际工况贴近的粘度测试方法，同时兼顾流动与填充能力。The above commonly used viscosity testing and characterization methods are far from the actual working conditions of potting adhesives. Therefore, it is necessary to develop a viscosity test method that is close to the actual working conditions, while taking into account the flow and filling ability.
发明内容SUMMARY OF THE INVENTION
本发明解决的技术问题是：克服现有技术的不足，提供了一种灌封胶粘剂粘度测试方法，通过结合盘型流动与楔形模具，使用灌封胶粘剂流动的路径长度以及对于楔形模具的充填性来表征其粘度，完成灌封胶粘剂粘度测试，解决了现有技术均与灌封胶粘剂真实的使用工况相去甚远，不能同时兼顾流动与填充能力的缺陷。The technical problem solved by the present invention is to overcome the deficiencies of the prior art and provide a method for measuring the viscosity of a potting adhesive. By combining a disc flow and a wedge-shaped mold, the path length of the potting adhesive flowing and the filling property of the wedge-shaped mold are used. To characterize its viscosity and complete the viscosity test of the potting adhesive, it solves the defect that the existing technology is far from the actual working conditions of the potting adhesive and cannot take into account the flow and filling ability at the same time.
本发明的技术解决方案是：一种灌封胶粘剂粘度测试方法，包括如下步骤：The technical solution of the present invention is: a method for testing the viscosity of a potting adhesive, comprising the following steps:
(1)清洁流动模具的型腔，然后令流动模具与当前测试环境达到热平衡；所述的型腔为内浇道的凹槽，为楔形；所述的流动模具的规格包括盘型流动模具、直线型流动模具；(1) Clean the cavity of the flow mold, and then make the flow mold reach thermal equilibrium with the current test environment; the cavity is the groove of the inner runner, which is wedge-shaped; the specifications of the flow mold include a disc-type flow mold, Linear flow mold;
(2)令灌封胶粘剂温度与当前测试环境达到热平衡；(2) Make the temperature of the potting adhesive reach a thermal balance with the current test environment;
(3)将灌封胶粘剂从流动模具的浇杯口的灌注到模具装置的型腔，当灌封胶粘剂在浇杯口的高度达到浇杯口液面高度阈值时，打开流动模具装置的阀口，使灌封胶粘剂在流动模具装置的内浇道连续流动并充填型腔，同时在打开闸口后继续灌注灌封胶粘剂使得浇杯口内灌封胶粘剂高度不低于液面高度阈值；所述的液面高度阈值为正数；(3) Pour the potting adhesive from the pouring cup mouth of the flow mold to the cavity of the mold device. When the height of the potting adhesive at the pouring cup mouth reaches the threshold value of the liquid level height of the pouring cup mouth, open the valve port of the flow mold device. , make the potting adhesive flow continuously in the inner runner of the flow mold device and fill the cavity, and at the same time continue to pour the potting adhesive after opening the gate, so that the height of the potting adhesive in the pouring cup mouth is not lower than the liquid level height threshold; The face height threshold is a positive number;
(4)当浇杯口内灌封胶粘剂液面高度不变或者流动模具装置的型腔尽头没有灌封胶粘剂流动时，停止灌注灌封胶粘剂，并等待灌封胶粘剂补缩时间；所述的灌封胶粘剂补缩时间为正数；(4) When the liquid level of the potting adhesive in the mouth of the pouring cup remains unchanged or the end of the cavity of the flow mold device does not flow the potting adhesive, stop the potting adhesive and wait for the filling time of the potting adhesive; the potting Adhesive feeding time is a positive number;
(5)当盘型流动装置或者楔形模具装置的型腔内灌封胶粘剂固化后，取出固化后的灌封胶粘剂，量取流动路径长度m、填充半径r；所述的路径长度m为固化后的灌封胶粘剂在模具装置内浇道中的长度；r为固化后的灌封胶粘剂在流动方向垂直截面上的最大距离；(5) After the potting adhesive in the cavity of the disc-shaped flow device or the wedge-shaped mold device is cured, take out the cured potting adhesive, and measure the flow path length m and the filling radius r; the path length m is after curing The length of the potting adhesive in the runner in the mold device; r is the maximum distance of the potting adhesive after curing on the vertical section of the flow direction;
(7)计算得到灌封胶粘剂粘度η＝a/m+br，其中，a、b为正数；(7) Calculate the viscosity of the potting adhesive η=a/m+br, where a and b are positive numbers;
(8)改变测试环境温度条件，并重复步骤(1)～(7)，完成不同测试环境温度条件下的粘度数据。(8) Change the test environment temperature conditions, and repeat steps (1) to (7) to complete the viscosity data under different test environment temperature conditions.
所述的清洁流动模具的型腔的方法包括如下步骤：The method for cleaning the cavity of the flow mold comprises the following steps:
(1)采用酒精对流动模具的型腔进行清理；(1) Use alcohol to clean the cavity of the flow mold;
(2)然后将流动模具的型腔烘干。(2) The cavity of the flow mold is then dried.
所述的令流动模具与当前测试环境达到热平衡为通过烘箱实现。The described making the flow mold reach thermal equilibrium with the current test environment is achieved by an oven.
所述的流动模具包括浇杯口、型腔、阀口、内浇道；内浇道为环形渐开线浇道或直线型浇道，内浇道凹槽为楔形，楔形角度为30°。The flow mold includes a pouring cup opening, a cavity, a valve opening, and an inner runner; the inner runner is an annular involute runner or a linear runner, and the inner runner groove is wedge-shaped, and the wedge-shaped angle is 30°.
所述的流动模具的材质为聚四氟乙烯，其表面粗糙度介于1.6μm～0.8μm。The material of the flow mold is polytetrafluoroethylene, and the surface roughness thereof ranges from 1.6 μm to 0.8 μm.
本发明与现有技术相比的优点在于：The advantages of the present invention compared with the prior art are:
(1)本发明与现有的旋转粘度计测试法、涂料粘度测试法和落球粘度计法相比，具有实现简单、直观、实用的优点，更有利于通过该粘度测试数据指导胶粘剂灌封工艺；(1) Compared with the existing rotational viscometer test method, paint viscosity test method and falling ball viscometer method, the present invention has the advantages of being simple, intuitive and practical, and is more conducive to guiding the adhesive potting process through the viscosity test data;
(2)本发明与现有的旋转粘度计测试法、涂料粘度测试法和落球粘度计法相比，工艺试验量小，可以通过简要试验矩阵就可获得满意的工艺参数。(2) Compared with the existing rotational viscometer test method, paint viscosity test method and falling ball viscometer method, the present invention has a small process test amount, and can obtain satisfactory process parameters through a brief test matrix.
附图说明Description of drawings
图1为一种灌封胶粘剂粘度测试方法中盘型流动装置结构图；1 is a structural diagram of a disc-type flow device in a method for measuring the viscosity of a potting adhesive;
图2为一种灌封胶粘剂粘度测试方法中楔形模具装置结构图。FIG. 2 is a structural diagram of a wedge-shaped mold device in a method for testing the viscosity of a potting adhesive.
具体实施方式Detailed ways
本发明克服现有技术的不足，提供了一种灌封胶粘剂粘度测试方法，通过结合盘型流动与楔形模具，使用灌封胶粘剂流动的路径长度以及对于楔形模具的充填性来表征其粘度，完成灌封胶粘剂粘度测试，解决了现有技术均与灌封胶粘剂真实的使用工况相去甚远，不能同时兼顾流动与填充能力的缺陷，下面结合附图对本发明方法进行详细说明。The invention overcomes the deficiencies of the prior art and provides a method for measuring the viscosity of a potting adhesive. By combining a disc-shaped flow and a wedge-shaped mold, the path length of the potting adhesive flowing and the filling property of the wedge-shaped mold are used to characterize its viscosity. The viscosity test of the potting adhesive solves the defect that the prior art is far from the actual working conditions of the potting adhesive and cannot take into account the flow and filling ability at the same time. The method of the present invention is described in detail below with reference to the accompanying drawings.
本发明方法的原理是使用盘型流动装置表征灌封胶粘剂在一定压力状态、温度环境下的流动能力，再通过流动路径的长度、楔形模具装置的填充性的直观体现灌封胶粘剂的粘度。其中，本发明方法要求灌封胶粘剂在同等温度、压力等工况下，盘型流动装置中的流动能力(流动路径长度)、楔形模具装置中的填充能力共同作为灌封胶粘剂粘度的表征指标。盘型流动装置、楔形模具装置的材质为聚四氟乙烯，内表面粗糙度介于1.6μm～0.8μm。The principle of the method of the present invention is to use a disc-shaped flow device to characterize the flow ability of the potting adhesive under a certain pressure state and temperature environment, and then directly reflect the viscosity of the potting adhesive through the length of the flow path and the fillability of the wedge-shaped mold device. Among them, the method of the present invention requires that the flow capacity (flow path length) in the disc-shaped flow device and the filling capacity in the wedge-shaped mold device of the potting adhesive under the same temperature, pressure and other working conditions are used as the characterization index of the potting adhesive viscosity. The material of the disc-shaped flow device and the wedge-shaped mold device is polytetrafluoroethylene, and the inner surface roughness is between 1.6 μm and 0.8 μm.
如图1所示为一种灌封胶粘剂粘度测试方法中盘型流动装置结构图，盘型流动装置包括浇杯口，高度为H，闸口直径d、直浇道高度为h，内浇道为环形渐开线浇道，凹槽为楔形，K为楔形宽度，L为楔形高度，楔形角度为30°，楔形角度保持尖锐，从而更有利于对于不同粘度胶粘剂的表征范围。环形渐开线模具的特征为胶液以固定线速度流动的同时又以固定的角速度绕该点进行转动，其适用于粘度较低的胶液，本发明方法中浇杯口上口(灌注灌封胶粘剂的浇杯口开口)直径大于下口直径，即如图1所示D大于d。Figure 1 shows the structure diagram of a disc-shaped flow device in a method for measuring the viscosity of a potting adhesive. The disc-shaped flow device includes a pouring cup mouth, the height is H, the diameter of the gate is d, the height of the sprue is h, and the inner runner is The annular involute runner, the groove is wedge-shaped, K is the wedge width, L is the wedge height, the wedge angle is 30°, and the wedge angle is kept sharp, which is more conducive to the characterization range of adhesives with different viscosities. The characteristic of the annular involute mold is that the glue liquid flows at a fixed linear velocity and rotates around the point at a fixed angular velocity, which is suitable for glue liquid with lower viscosity. The diameter of the opening of the pouring cup of the adhesive is greater than the diameter of the lower mouth, that is, as shown in Figure 1, D is greater than d.
如图2为一种灌封胶粘剂粘度测试方法中楔形模具装置结构图，楔形模具装置包括浇杯口，高度为H。闸口直径d、直浇道高度为h内浇道为平直浇道，凹槽为楔形，K为楔形宽度，L为楔形高度，楔形角度为30°，楔形角度保持尖锐，从而更有利于对于不同粘度胶粘剂的表征范围，直线型模具将适用于高粘度胶液。Figure 2 is a structural diagram of a wedge-shaped mold device in a method for testing the viscosity of a potting adhesive. The wedge-shaped mold device includes a pouring cup mouth, and the height is H. The gate diameter d, the sprue height is h, the inner runner is a straight runner, the groove is wedge-shaped, K is the wedge-shaped width, L is the wedge-shaped height, the wedge-shaped angle is 30°, and the wedge-shaped angle is kept sharp, which is more conducive to the Characterization range of adhesives of different viscosities, linear molds will be suitable for high viscosity adhesives.
本发明方法中粘度由流动性和填充性综合获取，其表达式为η＝a/m+br，其中，η为灌封胶粘度，m为流动路径长度，r为固化后的灌封胶粘剂沿流动方向垂直截面尖端位置的半径，a和b为特定常量，其中，m越大表明粘度越小，r越大表明粘度越大。另外，本发明方法中的表征粘度可采用标准的标油或有确定数据的灌封胶粘剂进行标定。本发明方法包括如下步骤：In the method of the present invention, the viscosity is comprehensively obtained from fluidity and filling, and its expression is η=a/m+br, where η is the viscosity of the potting adhesive, m is the length of the flow path, and r is the cured potting adhesive. The radius of the tip position of the vertical section along the flow direction, a and b are specific constants, where a larger m indicates a lower viscosity, and a larger r indicates a higher viscosity. In addition, the characteristic viscosity in the method of the present invention can be calibrated by using a standard standard oil or a potting adhesive with definite data. The method of the present invention comprises the following steps:
(1)充分清洁盘型流动模具装置、楔形模具装置的型腔，采用酒精对其内腔进行清理，烘干，然后放置在烘箱内烘烤后使其充分与环境达到热平衡。(1) Fully clean the cavity of the disk-shaped flow mold device and the wedge-shaped mold device, use alcohol to clean the inner cavity, dry it, and then place it in an oven to bake it to fully achieve thermal equilibrium with the environment.
(2)将灌封胶粘剂温度与环境温度平衡。(2) Equilibrate the temperature of the potting adhesive with the ambient temperature.
(3)将该胶粘剂从浇杯口(盘型流动装置或者楔形模具装置的浇杯口)的灌注到盘型内部，当到达规定液面高度时，打开流动槽阀门，使胶液连续流动充填型腔，应注意开开闸口后继续灌注胶粘剂直至浇杯口内胶液高度不低于规定液面高度。(3) The adhesive is poured from the pouring cup mouth (the pouring cup mouth of the disc-shaped flow device or the wedge-shaped mold device) into the inside of the disc type, and when it reaches the specified liquid level, the flow tank valve is opened to make the glue liquid flow and fill continuously For the cavity, it should be noted that after opening the gate, continue to pour the adhesive until the height of the glue in the pouring cup is not lower than the specified liquid level.
(4)浇注过程中应始终注意液面高度，当注意到液面高度缓慢或无法向下运动时，停止灌注。(4) Always pay attention to the liquid level during the pouring process, and stop pouring when you notice that the liquid level is slow or cannot move downward.
(5)在一定时间内允许对降低的液面进行补缩，直到液面不再下降，或槽道尽头不再有胶流动时停止灌注，其中，本发明有可能胶液从槽道上缘逸出，此时应缓慢灌注，以槽道尽头液体位置不再变化认定胶液灌注完全。(5) The lowered liquid level is allowed to be fed for a certain period of time, until the liquid level does not drop any more, or when there is no more glue flowing at the end of the channel, stop pouring, wherein the present invention may allow the glue to escape from the upper edge of the channel At this time, it should be poured slowly, and the liquid position at the end of the channel will no longer change to determine that the glue is poured completely.
(6)待胶液充分固化后，取出固化后的灌封胶，量取灌封胶流动路径长度m，然后对距离直浇道线性距离1cm位置处进行截面垂直剖切，在工具显微镜下表征填充半径r。(6) After the glue is fully cured, take out the cured potting glue, measure the flow path length m of the potting glue, and then vertically cut the cross-section at a linear distance of 1 cm from the sprue, and characterize it under a tool microscope Fill radius r.
(7)根据公式η＝a/m+br，将m和r带入公式，对于相同工艺，可将a、b赋予某特定数值，如需要与旋转粘度法进行对比，可在两种不同温度下，获取两组m，r值，将a和b求出。(7) According to the formula η=a/m+br, put m and r into the formula. For the same process, a and b can be assigned a certain value. If it is necessary to compare with the rotational viscosity method, it can be used at two different temperatures. Next, obtain two sets of m, r values, and find a and b.
(8)重复步骤1～7，并改变温度条件，获取不同温度条件下的粘度数据。(8) Repeat steps 1 to 7 and change the temperature conditions to obtain viscosity data under different temperature conditions.
(9)对于流动路径过短或过长情况，可考虑采用型腔截面不同尺寸的模具，从而适用不同粘度的胶粘剂粘度表征。下面结合实施例对本发明方法进行更详细的解释和说明。(9) For the case that the flow path is too short or too long, it can be considered to use molds with different dimensions of the cavity section, so as to be suitable for the viscosity characterization of adhesives with different viscosities. The method of the present invention will be explained and described in more detail below in conjunction with the examples.
在50℃条件下，对环氧灌封胶进行粘度测试试验。由于高温条件下，胶粘剂粘度相对较低，采用环形渐开线浇道模具进行浇注；充分清洁模具后，将模具放在50℃的热台上充分热平衡，待胶粘剂达到规定浇注温度时，按上述步骤中的实施方式进行实施。Under the condition of 50℃, the epoxy potting compound was tested for viscosity. Due to the relatively low viscosity of the adhesive under high temperature conditions, an annular involute runner mold is used for pouring; after the mold is fully cleaned, the mold is placed on a hot table at 50 °C to fully thermally balance, and when the adhesive reaches the specified pouring temperature, press the above The embodiments in the steps are implemented.
在室温条件下，对环氧灌封胶进行粘度测试试验。由于胶液粘度高，采用直线型模具进行浇注；充分清洁模具后，将模具在室温条件下充分热平衡，待胶粘剂达到规定浇注温度时，按上述步骤中的实施方式进行实施。The epoxy potting compound was tested for viscosity testing at room temperature. Due to the high viscosity of the glue, a linear mold is used for pouring; after the mold is fully cleaned, the mold is fully thermally balanced at room temperature, and when the adhesive reaches the specified pouring temperature, the implementation in the above steps is carried out.
本发明说明书中未作详细描述的内容属本领域技术人员的公知技术。The content not described in detail in the specification of the present invention belongs to the well-known technology of those skilled in the art.
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