Nowadays, welding is used in many places. First of all, we need to know what can be welded and what thickness is suitable for welding. So what should we pay attention to when using plastic welding? What are the important factors to ensure the welding quality? First of all, the pressure and time of welding should be considered.

1、壓力。

1. Pressure.

對(duì)焊接表面施加適當(dāng)?shù)膲毫?，焊接材料將由彈性向塑性過(guò)渡，還可以促進(jìn)了分子相互擴(kuò)散并擠去焊縫中的殘余空氣，從而增加焊接面密封性能。如果在焊接時(shí)未往下壓，或者焊條拉伸太大，往往會(huì)引起開裂。

Applying proper pressure on the welding surface, the welding material will be transformed from elastic to plastic, which can also promote the mutual diffusion of molecules and squeeze out the residual air in the weld, thus increasing the sealing performance of the welding surface. If the welding is not pressed down, or the electrode is stretched too much, it will often cause cracking.

2、時(shí)間

2. Time

要有適當(dāng)?shù)臒崛蹠r(shí)間和足夠的冷卻時(shí)間。當(dāng)熱功率一定時(shí)，時(shí)間不夠會(huì)出現(xiàn)虛焊，時(shí)間過(guò)長(zhǎng)會(huì)造成焊件變形，熔渣溢出，有時(shí)還會(huì)在非焊接部位出現(xiàn)熱斑（變色）。一定保證焊接面吸收足夠的熱量達(dá)到充分熔融的狀態(tài)，才能保證分子間充分?jǐn)U散熔合，同時(shí)一定保證足夠的冷卻時(shí)間使焊縫達(dá)到足夠的強(qiáng)度。

There should be proper hot melting time and enough cooling time. When the thermal power is fixed, insufficient time will lead to false welding, too long time will cause deformation of weldment, slag overflow, and sometimes hot spot (discoloration) will appear in the non welding parts. It is necessary to ensure that the welding surface absorbs enough heat to reach the state of full melting, so as to ensure the full diffusion and fusion between molecules, and at the same time, it is necessary to ensure that the cooling time is enough to make the weld achieve sufficient strength.

3、熔融量

3. Melting amount

熱熔時(shí)間和熱功率協(xié)調(diào)調(diào)整才會(huì)得到恰當(dāng)?shù)娜廴诹?，保證足夠的分子間融合，虛焊的現(xiàn)象。除了焊接設(shè)備和操作人員技能水平外，來(lái)之于塑料內(nèi)部或外部的各種因素，對(duì)焊接質(zhì)量有一定的影響，應(yīng)當(dāng)引起重視。

Only when the melting time and heat power are adjusted coordinately, the appropriate melting amount can be obtained, enough intermolecular fusion can be ensured, and the phenomenon of false welding can be eliminated. In addition to the skill level of welding equipment and operators, various factors from the inside or outside of plastics have certain influence on the welding quality, which should be paid attention to.

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