Rotary molding is the process by which engraved rollers are used to shape biscuits from dough. The rotary molder belt (also called the extraction web) extracts the raw biscuits from this shaping roller,supported by the forces of the pressure roller driving the belt. The belt then conveys the shaped pieces to the next application process using a tight transfer to ensure biscuit shape integrity.

1.面团料斗

2.可调强制滚轮

3.可调节刮刀

4.雕刻成型辊

5.橡胶涂层压力辊（提取辊）

6.旋转模塑料带

7.形成面团碎片

8.鼻栏紧缩

9. Scraper

最小化浪费的优点

与饼干制造的片材，测量和切割系统相比，对于正确的面团（不是太脂肪或太硬）旋转成型提供了重要的优势：

• No need to form and support a dough sheet
• Easy control of weight and shape
• 没有回收废料面团
• No gauging

In other words, rotary molding systems and belts deliver high output where accurate control of size, weight, thickness and texture are essential. As a result, rotary molding systems also reduce wastage and costs.

Challenges in the rotary molding process and how to crack them

虽然旋转成型系统的优点是清晰的，但生产完美的饼干取决于许多元素，从成分到食面，到面团和休息时间，以饼干的形状及其厚度，以及旋转模制品的类型和工厂的环境条件。

当前的趋势是增加生产pacity of biscuit production lines while keeping costs as low as possible. Line widths and speeds are increasing, creating additional challenges for operators. The drive to lower costs leads to the reduction or elimination of stock in the warehouse, while the wide choice of biscuits required by the market obliges producers to change formats more often, producing on the basis of orders received. This makes it essential to have accurate and careful maintenance of the lines, and the use of reliable and functional belts in all operating conditions.

随着事情并不总是顺利，饼干制造商经常与我联系以寻求建议。我得到的三个最常见的问题是：

1. How can I extract the biscuits easily from the engraved roller leaving as little tail as possible?
2. 如何充分利用旋转模板带，延长其生命？
3. 如何避免磨损皮带，这会导致污染？

Let’s have a look at these challenges and how to address them.

1.提取问题

提取问题可以具有几个原因，从滚子压力的不正当调节，到辊子和带之间的不同速度，以不充分的旋转模制品的维护。我们的面包店专家总是很乐意帮助确定困难的确切来源，并帮助消除这一点。

Often, however, extraction problems are caused by using the wrong belt materials for the dough. Natural fibers such as cotton are standard for rotary molder belts, due to their excellent extraction behavior based on the absorption of fat and moisture from the biscuit dough. But because cotton yarn has low resistance to abrasion and a tendency to stretch, it can be necessary to use other fibers as well, such as linen, polyamide or polyester, to obtain the ideal belt for the application.

We also find that belt joints on the extraction web can be the cause of uneven extraction. In these cases, we advise installing a belt that’s woven endless to eliminate the problem and ensure uniform extraction.

皮带的编织图案的选择也非常重要，因为萃取受饼干基座的锚固件对皮带织物的锚固影响。平原，交叉斜纹或人字形？我们可以建议每个面团的最佳编织模式。

2.短带寿命

在我们的经验中，皮带伸长率和边缘磨损是寿命短暂的两个主要原因，需要频繁的皮带更换。

皮带伸长，除了产生可能的跟踪问题之外，引起皮带宽度的窄。如果皮带比雕刻辊变窄，则不再能够生产饼干。过度伸长的原因可以是各种各样的，从错误的皮带类型选择到不正确的皮带使用。为了打击伸长率，我们建议的一个解决方案是在生产后松开带的张力，使皮带恢复其自然伸长率。

亚麻纤维提供横向稳定性并因此提供良好的可插拔性，而TPU浸渍不仅确保尺寸稳定性，而且还保留了带的下侧，必须与小直径的刀刃合作。

3.皮带磨损

皮带边缘的磨损是产品污染的主要原因之一，因此皮带替代品。一种解决方案是将聚酰胺纤维添加到带中的棉花中，这增加了通过金属刮刀的作用或雕刻辊的压力引起的带对磨损的耐磨性的耐磨性。另一种解决方案是将带有聚酰胺选择边缘的带，这为边缘磨损提供了耐用的保护，从而防止磨损和保护产品污染和浪费和费用这一原因。

Expert technical support

您是否满意您的饼干生产线以最大效率和输出运行？我和我的同事在我们的专家饼干应用团队中将很乐意讨论您的改造需求，清洁和维护程序，以及您的新安装的启动。请contact usor visit the Habasit website for more information onrotary molder belts。