点胶机的针头与胶水使用时应该注意哪些?

发布时间:2019/06/24    发布人:

点胶机本身是控制胶水吐出量和吐出时间的装置░,因此使用点胶机前一定要对影响电胶质量的胶水问题解决掉░,那么一般都存在哪些问题呢?我们和双组份打胶机厂家一起来看一下!
The dispensing machine itself is a device to control the amount and time of glue vomiting. So before using dispensing machine, we must solve the glue problem that affects the quality of electrocolloid. What problems do we usually have? Let's have a look with the two-component glue maker.
在点胶机胶水方面░,胶水一定不能有气泡░,一个小小气泡就会形成许多焊盘没有胶水░,形成空打现象░,招致产生不合格的产品░,所以每次中途改换胶管时必需排空衔接处░,关于胶水的固化░,普通消费厂家已给出温度曲线。在实践应尽可能采用比拟高的温度来固化░,使胶水固化后有足够强度。
In glue dispensing machine, glue must not have bubbles, a small bubble will form a lot of pads without glue, forming the phenomenon of air beating, resulting in unqualified products, so every time when changing the rubber pipe in the middle, it must empty the joint. As for the solidification of glue, ordinary consumer manufacturers have given the temperature curve. In practice, high temperature should be used as far as possible to make the glue strong enough after curing.
胶的粘度直接影响点胶的质量。粘度大░,则胶点会变小░,以至拉丝;粘度小░,胶点会变大░,进而可能渗染焊盘。点胶过程中░,应对不同粘度的胶水░,选取合理的背压和点胶速度。
Viscosity of glue directly affects the quality of dispensing. If the viscosity is high, the adhesive point will become smaller, even wire drawing; if the viscosity is low, the adhesive point will become larger, and then the pad may be stained. In the process of dispensing, we should select reasonable back pressure and dispensing speed for different viscosity glue.
除去胶水和外界环境的影响░,关于点胶机自身来说░,通常企业所用点胶机是采用螺旋泵供应点胶针头░,因而需求采取一个恒定的压力来保证足够胶水供应螺旋泵░,假如压力太大易形成胶溢出•●、胶量过多;压力太小则会呈现点胶断续现象░,漏点░,从而形成缺陷。所以应依据不同质量的胶水•●、点胶机工作环境温度等状况来选择压力。环境温度高则会使胶水粘度变小•●、活动性变好░,这时需调低背压即可保证胶水的供应░,反之亦然。
In addition to the influence of glue and external environment, as for the dispensing machine itself, usually the dispensing machine used by enterprises is to supply dispensing needles with a screw pump, so a constant pressure is needed to ensure that enough glue is supplied to the screw pump. If the pressure is too high, it is easy to form glue overflow and excessive glue content; if the pressure is too small, it will present the phenomenon of intermittent dispensing and leakage points, thus forming defects. Therefore, the pressure should be selected according to the different quality of glue and the working environment temperature of dispensing machine. High ambient temperature will reduce the viscosity and improve the activity of the glue. At this time, it is necessary to reduce the back pressure to ensure the glue supply, and vice versa.
在实践工作中░,我们以为针头内径大小应为点胶胶点直径的1/2░,这样的点胶效果是较为理想的░,因而点胶过程中░,要应依据PCB上焊盘大小来选取点胶针头░,这样既能够保证胶点质量░,又能够进步消费效率。不同的点胶机采用不同的针头░,有些针头有一定的止动度。每次工作开端应做针头与PCB间隔的校准░,即Z轴高度校准░,这一点常常容易被疏忽。

自动点胶机
In practice, we think that the inner diameter of the needle should be 1/2 of the diameter of the dispensing point, so the dispensing effect is ideal. Therefore, in the dispensing process, the needle should be selected according to the size of the pad on the PCB, which can not only ensure the quality of the dispensing point, but also improve the consumption efficiency. Different dispensing machines use different needles, some needles have a certain degree of motility. It is often neglected that the interval between the needle and PCB should be calibrated at the beginning of each work, i.e. Z-axis height calibration.
点胶量的大小依据工作经历░,胶点直径的大小应为焊盘间距的一半░,贴片后胶点直径应为胶点直径的1.5倍。这样就能够保证有充足的胶水来粘结元件又防止过多胶水浸染焊盘。点胶量几由螺旋泵的旋转时间长短来决议░,实践中应依据室温•●、胶水的粘性等选择泵的旋转时间。
The amount of dispensing depends on the working experience. The diameter of the adhesive spot should be half of the distance between the pads. The diameter of the adhesive spot after the patch should be 1.5 times of the diameter of the adhesive spot. In this way, sufficient glue can be guaranteed to bind the components and prevent too much glue from impregnating the pad. The amount of dispensing is determined by the rotating time of the screw pump. In practice, the rotating time of the screw pump should be selected according to the room temperature and the stickiness of the glue.
本文由双组份打胶机厂家进行编写░,想要了解更多的产品及更详细的精彩内容░,请关注我们的官方网站:!您的惠顾是对我们很大的支持。
This article is written by two-component glue maker. For more products and more details, please pay attention to our official website: ! Your patronage is a great support to us.

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