Plastic bottle cap screwing finger and its working method

Abstract

The invention provides a plastic bottle screw cap clamping finger and a work method thereof. The plastic bottle screw cap clamping finger comprises a static clamping finger body connected to a star wheel disc, and a movable clamping finger body. The star wheel disc rotates. When a clamping rolling wheel rotates to the protruded part of a clamping cam, the a clamping rolling wheel drives a lower swing arm to rotate in the clockwise direction and compresses a clamping spring, a nut and a pull rod drive an upper swing arm, a rotary shaft and the movable clamping finger body to rotate together in the clockwise direction, and thus the movable clamping finger body and the static clamping finger body clamps the bottleneck of a plastic bottle. When the clamping rolling wheel rotates to the downward-concave part of the clamping cam, under the action of an open spring, the movable clamping finger body rotates in the anticlockwise direction, and the plastic bottle clamping finger is opened. When the nut compresses the clamping spring, the clamping force between the movable clamping finger body and the static clamping finger body is increased. The plastic bottle screw cap clamping finger is suitable for round bottles and non-round bottles, adjustment is not needed when the bottle type is replaced, the service life is long, reliability is achieved, manufacturing and machining are convenient, adjustment is easy, the cost is low, and adjustment of the clamping force is convenient.

Description

technical field [0001] The invention relates to the field of plastic bottle capping equipment, in particular to a plastic bottle capping finger and a working method thereof. Background technique [0002] During the capping and sealing process of plastic bottles, the capping head carries the cap and tightens the cap on the thread of the plastic bottle mouth; therefore, a device is needed to fix the bottle body and prevent it from rotating during the capping process , At the same time, it also plays the role of transferring plastic bottles. [0003] The device for fixing the bottle body in the plastic bottle capping equipment currently mainly has the following two forms: [0004] a. Combination of semicircular anti-rotation knife and bottleneck support plate, see Figure 5 with Image 6 : The tip of the semicircular anti-rotation knife is upward, part of the shoulder of the plastic bottle falls on the tip of the knife, and the other part is supported on the bottleneck suppor...

AI Technical Summary

Problems solved by technology

The disadvantages are: 1. When the bottle diameter changes, the bottle body star wheel and the bottle body guard need to be replaced; 2. When the plastic bottle is a non-circular bottle (such as a square bottle, a rectangular bottle), the bottle body star wheel, bottle body The gap between the guard plate and the bottle body needs to be large, and the effect of holding the bottle is greatly reduced; 3. During the capping process, the capping head needs to exert a large downward force on the bottle mouth, otherwise there will be a gap between the plastic bottle and the anti-rotation knife. Slip; however, a greater downforce will cause greater frictional resistance between the bottle and the cap, affecting the stability of the capping torque

The disadvantages are: 1. The structure is complex and the manufacturing cost is high, because the parts of the fingers are generally made of austenitic stainless steel (corrosion resistance is required), and the synchronous gear needs to be surface hardened; 2. Because both fingers are rotating, Therefore, it is difficult to adjust the coaxiality between the bottle mouth and the capping head; the wear of the gear and the wear of the anti-rotation knife will affect the coaxiality

3. The force required to clamp the spring is relatively large, and the clamping cam and the clamping roller are easy to wear

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