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是什么原因造成了制袋机封口不牢？
(1) 热封温度不够 通常情况下，以OPP为里料的复合袋，当制袋总厚度为80～90μm时，热封温度要达到170～180℃；以PE为里料的复合袋制袋总厚度为85～100μm时，温度宜控制在180～200℃。只要制袋总厚度有所增加，热封温度就必须相应提高。
(1) When the heat sealing temperature is not enough, the heat sealing temperature of the compound bag with OPP as the lining should be 170-180 ℃ when the total thickness of the bag is 80-90 μ m; when the total thickness of the compound bag with PE as the lining is 85-100 μ m, the temperature should be 180-200 ℃. As long as the total thickness of the bag is increased, the heat sealing temperature must be increased accordingly.
(2) 热封速度过快 封不上口还与封口机速度快慢有关。如果速度过快，封口处还未来得及热化就被牵引辊传送至冷压处进行冷却处理了，自然达不到热封质量要求。
(2) The speed of heat sealing is too fast, and the speed of sealing machine is also related. If the speed is too fast, and the sealing part is not heated yet, it will be sent to the cold pressing part by the traction roller for cooling treatment, which naturally fails to meet the quality requirements of the heat sealing.
(3) 冷压胶轮压力不合适 冷压胶轮上下各有一个，它们之间的压力要适中，调节压力时只需夹紧弹簧即可。
(3) The pressure of the cold pressing rubber wheel is not suitable. There is one above and one below the cold pressing rubber wheel. The pressure between them should be moderate. When adjusting the pressure, just clamp the spring.
(4) 热封温度不够 只需适当提高热封温度即可解决问题。
(4) If the heat seal temperature is not enough, the problem can be solved by increasing the heat seal temperature properly.
(5) 热封刀的刀面不够平整 热封刀分上、下两片，通常热电耦装于其中，用来感应温度的传递情况。热封刀上有三个螺杆，中间的螺杆起支撑和加固刀片的作用，其他两个螺杆都配有压力弹簧及垫片，主要用于调节热封刀压力，上、下刀片各有两个弹簧。造成热封刀刀面不平整的主要原因是中间螺杆装斜了，不是水平的；或者是上热封刀的压力弹簧压力不均。 解决方法是重新校正中间螺杆的位置，使其处于水平状态。如果上、下热封刀不平衡，则要通过调节压力弹簧来实现，调节到适中即可。让弹簧向外退时，热封刀将向下坠；将下刀片的弹簧向上施紧时，热封刀将向上移动。
(5) The surface of the heat sealing knife is not smooth enough. The heat sealing knife is divided into two parts, the upper and the lower. Usually, the thermo electric coupling is installed in it to sense the transfer of temperature. There are three screws on the heat sealing knife. The middle screw supports and strengthens the knife. The other two screws are equipped with pressure spring and gasket, which are mainly used to adjust the pressure of the heat sealing knife. The upper and lower blades have two springs respectively. The main reason for the unevenness of the knife face of the heat sealing knife is that the middle screw is inclined, not horizontal; or the pressure of the pressure spring of the upper heat sealing knife is uneven. The solution is to recalibrate the position of the intermediate screw to make it horizontal. If the upper and lower heat sealing knives are not balanced, it is necessary to adjust the pressure spring to moderate. When the spring retreats outward, the heat sealing knife will fall; when the spring of the lower blade is tightened upward, the heat sealing knife will move upward.
(1) When the heat sealing temperature is not enough, the heat sealing temperature of the compound bag with OPP as the lining should be 170-180 ℃ when the total thickness of the bag is 80-90 μ m; when the total thickness of the compound bag with PE as the lining is 85-100 μ m, the temperature should be 180-200 ℃. As long as the total thickness of the bag is increased, the heat sealing temperature must be increased accordingly.
(2) 热封速度过快 封不上口还与封口机速度快慢有关。如果速度过快，封口处还未来得及热化就被牵引辊传送至冷压处进行冷却处理了，自然达不到热封质量要求。
(2) The speed of heat sealing is too fast, and the speed of sealing machine is also related. If the speed is too fast, and the sealing part is not heated yet, it will be sent to the cold pressing part by the traction roller for cooling treatment, which naturally fails to meet the quality requirements of the heat sealing.
(3) 冷压胶轮压力不合适 冷压胶轮上下各有一个，它们之间的压力要适中，调节压力时只需夹紧弹簧即可。
(3) The pressure of the cold pressing rubber wheel is not suitable. There is one above and one below the cold pressing rubber wheel. The pressure between them should be moderate. When adjusting the pressure, just clamp the spring.
(4) 热封温度不够 只需适当提高热封温度即可解决问题。
(4) If the heat seal temperature is not enough, the problem can be solved by increasing the heat seal temperature properly.
(5) 热封刀的刀面不够平整 热封刀分上、下两片，通常热电耦装于其中，用来感应温度的传递情况。热封刀上有三个螺杆，中间的螺杆起支撑和加固刀片的作用，其他两个螺杆都配有压力弹簧及垫片，主要用于调节热封刀压力，上、下刀片各有两个弹簧。造成热封刀刀面不平整的主要原因是中间螺杆装斜了，不是水平的；或者是上热封刀的压力弹簧压力不均。 解决方法是重新校正中间螺杆的位置，使其处于水平状态。如果上、下热封刀不平衡，则要通过调节压力弹簧来实现，调节到适中即可。让弹簧向外退时，热封刀将向下坠；将下刀片的弹簧向上施紧时，热封刀将向上移动。
(5) The surface of the heat sealing knife is not smooth enough. The heat sealing knife is divided into two parts, the upper and the lower. Usually, the thermo electric coupling is installed in it to sense the transfer of temperature. There are three screws on the heat sealing knife. The middle screw supports and strengthens the knife. The other two screws are equipped with pressure spring and gasket, which are mainly used to adjust the pressure of the heat sealing knife. The upper and lower blades have two springs respectively. The main reason for the unevenness of the knife face of the heat sealing knife is that the middle screw is inclined, not horizontal; or the pressure of the pressure spring of the upper heat sealing knife is uneven. The solution is to recalibrate the position of the intermediate screw to make it horizontal. If the upper and lower heat sealing knives are not balanced, it is necessary to adjust the pressure spring to moderate. When the spring retreats outward, the heat sealing knife will fall; when the spring of the lower blade is tightened upward, the heat sealing knife will move upward.
