來自AZ的真空包裝機知識

真空包裝機是一種非常流行的包裝設備,用於去除包裝中的空氣,使包裝內部獲得“真空”環境,並通過熱封使包裝保持一定時間的“真空”狀態。 食品工業是真空包裝技術發揮作用的最重要領域。 在食品行業,真空包裝可以有效延長食品的保質期,方便食品的儲存、流通和銷售。 真空包裝技術在醫療器械的包裝中也很常見,用於隔離和抑制細菌,保證醫療器械的無菌性能。 紡織行業也常採用真空包裝技術對紡織品進行包裝,以達到防潮、防蟲和壓縮產品體積的效果。

商用(工業級)真空包裝機的用途非常廣泛,我們有必要了解相關知識,包括機器的選購、安裝、主要結構部件和工作流程等,如果您是真空包裝機包裝機專業人士或想聯繫我們了解相關信息,請跳過本文至 產品頁面,其中列出了我們提供的真空包裝機的詳細信息。

真空包裝機

There are many types of vacuum packaging machines. In terms of machine structure and workflow, semi-automatic and fully automatic vacuum packaging machines are completely different. In this article, we will take the 雙室真空包裝機 as an example to present the knowledges of the semi-automatic vacuum packing machines. Please understand the following contents are for reference only, machines from different manufacturers might be different in many ways.

如何選購真空包裝機

1. 確定真空包裝是否是您產品的正確包裝方法。 不要真空包裝未經預處理的新鮮蔬菜和水果,因為無氧呼吸會加速腐敗。 粉末產品需要專門設計的真空包裝機。 酥脆的產品需要充氮氣,防止擠壓和粉碎。 熟肉和熟食在真空包裝後需要滅菌。

2.了解產品尺寸和包裝尺寸。 半自動真空包裝機用於將產品包裝在預製真空袋中。 明確真空袋尺寸和包裝尺寸(長*寬*高,產品裝入袋後)以確定真空包裝機尺寸很重要。

3.包裝生產率要求(包/小時)。 您可能需要一台小型機器來降低生產率,或者需要更大的機器來提高生產率,甚至可能需要多套更大的機器。 真空包裝機的生產率取決於包裝尺寸和機器尺寸。

4、找一家專業的真空包裝機製造商和供應商。 好處:

  • 您將從專業供應商處獲得專業建議
  • 保證機器質量
  • 直接溝通,快速解答問題,節省時間和精力
  • 有保障的售後服務
  • 更多優化機器的選項,靈活的設計
  • 機器質量與價格的完美結合

5. 向機器供應商提供相關信息以獲得報價:

  • 包裝什麼產品
  • 產品尺寸
  • 包裝尺寸
  • 真空包裝前後的產品狀態
  • 生產力要求
  • 真空袋使用規格
  • 本地電源
  • 付款方式及送貨方式

6.洽談價格和條款,簽訂合同,付款並等待接收真空包裝機。

如何選購真空包裝機

真空包裝機的安裝

收到購買的真空包裝機後,首先應檢查外包裝盒是否有破損。 如果是這樣,您需要先拍照與賣家溝通解決問題。 我們通常使用堅固的免熏蒸木箱來包裝真空包裝機,以確保機器不會損壞。 但在極端情況下,如果機器損壞,應立即聯繫賣家。 一般在發貨時,賣家都會購買海上保險,以確保貨物的損失得到賠償。

如果一切順利,下一步就是安裝。

  • 真空包裝機應安裝在平坦、堅實、乾淨的地面上,固定牢固。
  • 真空包裝機的工作環境要有適宜的溫度、低濕度、低鹽分,以減少機器被腐蝕的概率。 機器雖然採用了耐腐蝕的SUS304材質,但是電器部分比較容易生鏽。 對於濕度和鹽分較高的魚類和海鮮加工設施,強烈建議準備乾燥設備,以降低空氣中的水分和鹽分含量,以延長真空包裝機的使用壽命。
  • 電源連接。 商用真空包裝機通常需要三相電。 世界上最常用的三相電電壓為3V、3V、220V、380V、400/415Hz。 確保您的供應商已根據您當地的電源規格定制了電氣部件。
  • Cooling water connection. This is only applied to the belt-type continuous vacuum packaging machines. The cooling water must be clean and able to cool down the temperature of heating elements after each heat-seal cycle is completed.
商用真空包裝機

Working process of (double chamber) vacuum packaging machine

Step 1, Preset vacuum time, heat-seal time, cooling time, heating temperature from the control panel. The value of these parameters shall be set according to vacuum chamber volume, vacuum pouch material and thickness.

Step 2, Put the products into 預製真空袋, make sure the cleaness of the bag’s sealing area, avoid oil and water contamination to ensure the sealing strength and prevent leakage. Different food products require vacuum pouches made of different materials, check 這篇文章 以供參考。

Vacuum packaging first step put products into the premade vacuum pouches

Step 3, Put the vacuum pouches onto the working plate of vacuum packaging machine, sealing area of vacuum pouches right on the silicone strip, use the metal bar to press the sealing area.

雙室真空包裝機

Step 4, Vacuum and seal. Press the vacuum chamber cover for 2-3 seconds (for double chamber vacuum packaging machines with automatic chamber cover swing function, it’s not necessary to press the chamber cover manually), 限位開關 will be triggered to start the vacuum pump automatically. The air in the vacuum chamber as well as in vacuum pouches will be evacuated, vacuum meter will show the real-time vacuum degree. The vacuum and seal step details:

  1. Vacuum. Meanwhile the heating wire is heated
  2. When the vacuum period reaches the preset vacuum time, vacuum pump stops working
  3. Air bag inflates to push the heating element (heating wire, heating isolation cloth) down to press the sealing area of vacuum pouches. The vacuum pouches are heated and sealed for a few seconds
雙室真空包裝機

Step 5, Magnetic valve opens to allow air flow back into the vacuum chamber, heating element bouce back to position, vacuum chamber cover slightly bounces up automatically

Step 6, Repeat the cycle in another vacuum chamber

Main components of vacuum packaging machine

1. The vacuum chamber. The bottom part of vacuum chamber is the working plate, which is fixed. The bottom vacuum chamber is the chamber cover, which swings alternatively between the 2 sides of the double chamber vacuum packing machine. There is a silicone sealing gasket mounted in the side groove of the chamber cover to prevent air leakage during vacuum process.

It’s important to make sure the vacuum chamber is strong enough to resist the powerful negative pressure during vacuum pump works to evacuate air. So vacuum chamber usually is made of SUS304 stainless steel 3-4 mm, reinforced construction prevents deformation caused by negative pressure.

silicone sealing gasket of vacuum packing machine
The silicone sealing gasket of a single chamber vacuum packing machine

2. The vacuum chamber cover open, move and balancing facility. The chamber cover of double chamber vacuum packing machine moves from one side to another during each packaging cycle, with the help of 4 connection rods. The four connecting rods are fixed on two long shafts, and there are tension spring shift forks on the long shafts. The lower part of the two tension springs is positioned on the frame, and the upper part is positioned on the tension spring shift forks to balance the operation gravity. The two long shafts are positioned by two sets of bearing seats, and the upper parts of the four connecting rods are also inlaid with miniature bearings, so the left and right displacement is very easy. When the vacuum is started, a little pressure is applied, and it can be opened automatically after the air return is completed. The four connecting rods supporting the displacement of the upper vacuum chamber, the front and rear two on each long axis must be kept parallel, and the left and right two sets of connecting rods must also be relatively parallel to ensure that the upper vacuum chamber is the same as the lower vacuum chamber at any position on the left or right. Keep parallel, otherwise, the upper and lower vacuum chambers cannot be kept parallel, and the operating pressure will increase significantly, and even the vacuum cannot be established normally in severe cases.

connecting rods of double chamber vacuum packaging machine
Connecting rods of double chamber vacuum packaging machine

3. Heat-sealing and printing devices. Heating assembly is composed of a phenolic rod to support the whole heating system, a sealing wire (nichrome) for heating and sealing, a PTFE cloth to prevent vacuum bags burning, a airbag to press sealing wire, and other devices to install and fix the elements. Heating assembly is installed on the top vacuum chamber cover. For printing, there are molds for characters (numbers and alphabets) that can be installed in the silicone stripes.

vacuum packaging machine heating sealing assembly
vacuum packaging machine heating sealing assembly
sealing wire for vacuum packaging machine
PTFE heating isolation cloth for vacuum packaging machine
air bag of vacuum packaging machine
vacuum packaging machine silicone sealing strips

4. 真空系統. The vacuum system of double chamber vacuum packaging machine includes vacuum pump, vacuum meter, magnetic valves, and vacuum pipes. Vacuum system is the heart part of a vacuum packing machine, it’s important to use powerful and durable 真空泵. We usually use China top brand vacuum pump or Busch vacuum pump. 真空計 indicates the vacuum degree of vacuum chamber in real time so you can check the vacuum status any time. Two vacuum magnetic valves are usually used, one is a ¢5 two-position three-way magnetic valve, and its main function is to control the work of the upper and lower positions of the hot-press sealing device. The other is a ¢15 two-position two-way magnetic valve. Its main function is to open the passage after vacuum and heat sealing, so that the atmosphere returns to the vacuum chamber, otherwise the vacuum chamber cannot be opened.

Busch vacuum pump used on our vacuum packaging machines
Busch R5-RA0100F is usually used on small-medium vacuum packaging machines, including LDZ600/2S, LDZ700/2S

5. Electrics, including time relays, transformers, and contactors. We can also supply vacuum packaging machine with PLC and touch screen control upon request.

6. Vacuum packaging machine frame construction. Most industrial-grade vacuum packing machines are designed to stand on floor, so a solid frame construction is important to support the whole system for very long time (5-10 years). The frame and base shall be made of reinforced SUS304 stainless steel, and sturdy castors shall be equipped for each moving of the machine.

Daily maintenance of vacuum packaging machine

After we purchase a vacuum packing machine, we certainly want to use if for as long time as possible. The durability of a vacuum packaging machine is of course determined by it’s quality, but daily maintenance of also important. Effective maintenace can reduce machine downtime, prevent unpredictable failures, prolong machine’s service life.

  1. Vacuum packaging machine must be operated and maintained by trained person
  2. Clean vacuum packaging machine before and after each working shift
  3. Keep watching the oil level and oil color of vacuum pump from the observation window. If the oil level goes below the 1/3 part of the observation window, of color of oil goes black, you should refill oil or replace oil. Usually the vacuum pump oil shall be replaced after 500-2000 working hours, depending on the working environment.
  4. Lubricate the connection rod and springs periodically
  5. Keep an eye on sealing wires, PTFE heating isolation cloth and time relays

故障排除

The double chamber vacuum packaging machine is a conventional packaging equipment with a relatively simple structure, easy to use and maintain. Generally, problems can be solved by users themselves.

1. Vacuum pump doesn’t work/ loud noise

  • The power supply phase is missing or the fuse is broken. Solution: check the power supply line or replace the fuse.
  • The vacuum pump is reversed. Solution: power commutation.
  • The main contact point of the IC is in poor contact. Solution: adjust or replace it with a new one.
  • The ISJ normally closed contact is in poor contact. Solution: adjust or replace it with a new one.
  • The vacuum pump does not stop overtime. The reason is that the time relay does not work. Solution: repair or replace it.

2. Low vacuum degree or no vacuum

  • The vacuum pump oil is too little or polluted. Solution: add oil or change the oil.
  • The vacuum pump smokes or leaks. Solution: clean the vacuum pump, replace the exhaust filter, and check the back-pressure valve.
  • The vacuum pipe system is not sealed tightly. Solution: check the vacuum pipes, repair or replace leakage points.
  • The magnetic valve 2DT iron core is stuck and cannot be reset. Solution: overhaul or cleaning.
  • Bad quality vacuum pouches
  • Magnetic valve 1DT doesn’t work. Solution: Repair or replace

3. Not sealing or bad sealing quality

  • Sealing wire broken
  • Air bag broken
  • Inappropriate vacuum/sealing time
  • The heat sealing circuit is loose or broken.
  • The main contact of 2C is in poor contact
  • 2C doesn’t work

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