When customers look for plastic bottles, they always overlook a very important issue, that is, the size of the mouth of the bottle. Tooth mouth, as the name suggests, the mouth of the bottle refers to the size of the part with teeth on the mouth of the bottle, the following is a real sample picture to illustrate
The most common dental mouths in the cosmetics industry on the market are: 18 teeth, 20 teeth, 24 teeth, 28 teeth, 32 teeth, wide mouths have 47 teeth, 53 teeth, 68 teeth, and 89 teeth.
Many times, when purchasing or customers ask the manufacturer how many mouths are, they don’t know what it is or which position to measure. In fact, what the manufacturer asks is the size of the mouth. You can take a caliper according to the picture Flip top cap and measure it. For example: 18 teeth, you will find that it is about 17.5mm, and 24 teeth is about 23.5mm. Why is it not an integer? This problem is a product design problem.
But it is enough to keep in mind that the mouths mentioned by the manufacturer are about 0.3-0.5mm larger than the actual measured diameter. Let me give another example: For example, if the mouth size is 28 teeth, then the actual measurement of the bottle mouth with teeth is 27.5mm. This is easy to understand.
Next, we will come to understand the rarely used, but also very important part, that is the tooth pitch and tooth shape. Once the tooth shape and tooth pitch are incorrect, the cover is not fitted or there will be problems such as slippage (out of tooth) or liquid leakage if it is fitted. Let's first understand the lower tooth distance and measurement method,
The 18 teeth, 20 teeth, 24 teeth mentioned above are all from the standard mouth, so their pitch is the same.
