The videos below are examples of the Wrappers Frain Carries
水平包装视频
倒水平包装视频
外包栏视频
切，包装和扭曲Videos
折叠束视频
Learn more about Wrappers
Strictly speaking, wrapping, sometimes called overwrapping, is not considered “灵活的包装。” However, wrapping does use flexible film and foil of various materials and combinations. Many fo the general considerations for films discussed in previous white papers on Form-Fill-Seal and pouching machines will apply to wrapping machines as well.
This paper will use the word “wrapping” in a broad generic sense to cover all types of wrapping.
包装有时用作主要包装。一些单独的糖果，咳嗽滴等可以直接包裹。更常用的包装用作二级或三级包装。二次用途的一个例子是收缩包裹的罐子或24包装捆的水。
Wrapping can also be used as a tertiary packaging such as overwrapping an individual carton or bundle of cartons. When used as a tertiary packaging in the past, appearance has not been considered very important since the customer would never see it. The rise of club stores like Sam’s Club and Costco has changed this. The 6 pack of canned corn is now the unit of sale in these stores and appearance has become critical to encourage the customer to buy. Previously translucent grey film was fine. Now, glossy film with registered graphics is needed to catch the customer’s eye. This changes the choices of machinery that can be used.
Higher performance films have allowed the reduction and elimination of corrugated board. These three pictures show the progress of the 1500ml water bottle from an shrinkwrapped tray to a shrinkwrapped slip sheet to shrinkwrap only. This reduces the cost of materials as well as the cost of packaging machinery required.
双重卷包如何工作：
这些是巨大的机器，简单，产品之间没有转换，可以在低至中等生产速度下运行。
他们的主要缺点是他们无法注册。电影上的彩色图形吸引了客户的眼光，并提供产品信息。
要运行图形胶片，请注册，需要单个滚动包装器。这些可以高速运行，每分钟60包或更多。多个车道可以更快地制作它们。
Product is fed to the wrapper in multiple lanes corresponding to the pack pattern.
At the infeed they are separated into 6 lanes and grouped into a 3 across by 2 long pattern. A conveyor carries the 6 packs to the wrapping station where they are timed to the film.
在包装纸下，2卷薄膜在注册标记上展开并切割成长度。真空输送机将薄膜带上并将其定位在包装输送机上。
一旦薄膜就位，瓶子就会进入包装输送机上，薄膜释放。随着瓶子和薄膜被传送，旋转臂在薄膜的后缘下提出，将其升高，然后在瓶子上升压，然后在包装输送机和收缩隧道输送机之间进行间隙。
作为输送机之间的瓶子转移，它们将薄膜的前缘拉下来，使其与后缘重叠。热隧道输送机足够热以密封重叠的薄膜层。
当它们穿过隧道时，薄膜将缩小到紧密的保形束中。
Side sealing shrink wrappers folded film with 3 seals to make a complete 6 sided wrap.
成品包装与L杆密封相同，但没有L杆。这些机器通常以连续运动连续运行，速度为每分钟或更长时间200个包装。
连续运动要求产品与包装器同步。凸耳链用于一些机器。其他机器使用带有传感器的伺服驱动输送机保持同步。
Folded film is pulled off the roll. Some lower speed machines pull the film with the saide sealing rollers. Higher speeds will require a motorized unwind to avoid excess tension on the film and/or slippage in the sealing rollers. A pinwheel roller perforates the film as it unwinds. This is necessary to allow venting during shrinking to prevent a pillow effect. Guides open the film and pass it over and under the conveyor.
开放的电影是被一双upper and lower wheels. These wheels serve 3 functions:
- 它们向前和通过机器拉动电影（由输送机辅助）
- 它们纵向密封薄膜
- 他们切掉过多的材料
该进入将产品推向层之间的薄膜上。这部电影通过指南保持开放。密封轮和输送机通过机器将薄膜用产品拉动，密封开放侧以及切断过量的材料。侧面密封后，产品封闭在3个侧管中。
横向或横切条密封薄膜的后端，下一个封装的前端并将它们分开。该切割/密封条垂直往复运动。在间歇运动机上，不需要纵向运动。对于连续运动，切割/密封杆必须安装在允许它们与薄膜上纵向移动的机构上的机构上。
密封后，包装通过加热的收缩隧道，其中热量将薄膜整合到产品上。
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