CN209858041U - Double-final-detection weighing mechanism - Google Patents

Abstract

The utility model discloses a two examine balance mechanism eventually, its including the small manufactured goods that is in the same place of establishing ties examine balance and big goods examine balance eventually, and the small manufactured goods examines the balance and be close to the setting of goods input end eventually, the length that the small manufactured goods examined the balance eventually is 2800mm and its small manufactured goods that are used for weighing length for 1245 + 2090mm, the length that the big manufactured goods examined the balance eventually is 4500mm and its big manufactured goods that are used for weighing length for 2090 + 3800mm, the small manufactured goods examines balance and big manufactured goods examine the balance eventually and can realize switching according to the difference of goods and weigh under the control of industrial computer. The utility model discloses can satisfy the accuracy of big, the small goods fixed length after cutting off and weigh, improve the production speed of small goods simultaneously.

Description

Double-final-detection weighing mechanism

Technical Field

The utility model relates to a tire production facility, especially a two balance mechanisms of examining eventually.

Background

The final balance is used for accurately measuring the weight of products (tread, cushion rubber and triangular rubber) after being cut to a fixed length. The extrusion speed of large products (treads) with long, wide and thick parts is slow, and small products (cushion rubber and apex rubber) with short, narrow and thin parts can be extruded at a fast speed. The final balance can satisfy the weighing of both large products and small products. The final scale length design is primarily dependent on the maximum length of the product to be weighed and the safety time (i.e., the minimum time that the product must stay after being loaded on the scale). The longest tread is generally used for calculating the length of the scale, and small products have enough safety time, so that weighing cannot be problematic. But doing so ignores a problem: namely, the extrusion speed of the small product is high, the length of a single strip is short, and the cutting interval time is short. Thus, an unavoidable problem occurs, that is, when a small product is produced, a plurality of front and rear products are weighed at the same time (i.e., the front product is not separated from the weighing pan, and the rear product is weighed), so that weighing cannot be performed.

In the past, only two approaches have been taken to solve this problem: 1. reducing the linear speed; 2. the linear velocity is increased. However, both methods have inevitable drawbacks: reducing the linear velocity means a reduction in productivity, which is unacceptable; the linear velocity cannot be increased infinitely, which is limited by the ability to later manually/automatically take up. Therefore, many manufacturers can only adopt the method of keeping speed and keeping capacity, and the fact that small products cannot be weighed is "tolerated". Over time, the market has increased the demands on tire quality, and more tire factories require precise weighing of small products.

Disclosure of Invention

An object of the utility model is to solve above-mentioned technical problem and provide a weigh accurate two balance mechanisms of examining eventually.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a double final inspection scale mechanism comprises a small product final inspection scale and a large product final inspection scale which are connected in series, wherein the small product final inspection scale is arranged close to a product input end, the length of the small product final inspection scale is 2800mm and is used for weighing small products with the length of 1245 + 2090mm, the length of the large product final inspection scale is 4500mm and is used for weighing large products with the length of 2090 + 3800mm, and the small product final inspection scale and the large product final inspection scale can realize switching weighing according to different products under the control of an industrial personal computer.

The utility model has the advantages that: the utility model discloses can satisfy the accuracy of big, the small goods fixed length after cutting off and weigh, improve the production speed of small goods simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of the double final balance mechanism of the present invention.

Detailed Description

The invention will be described in further detail with reference to the following drawings and detailed description:

referring to fig. 1, the dual final inspection weighing mechanism of the present invention comprises a small product final inspection weighing scale 1 and a large product final inspection weighing scale 2 connected in series, and the small product final inspection weighing scale 1 is disposed near the product input end. The small product final inspection scale 1 has a length of 2800mm and is used for weighing small products with a length of 1245-2090mm, and the large product final inspection scale 2 has a length of 4500mm and is used for weighing large products with a length of 2090-3800 mm. The small product final inspection scale 1 and the large product final inspection scale 2 can realize switching weighing according to different products under the control of an industrial personal computer, namely when the small product is conveyed at the product input end, the small product enters the small product final inspection scale 1 and is weighed by the small product final inspection scale 1, the industrial personal computer controls the large product final inspection scale 2 to be closed, and the large product final inspection scale 2 only plays a role in conveying the small product; when a large product is conveyed at the product input end, the industrial control machine controls the small product final inspection scale 1 to be closed, the large product enters the small product final inspection scale 1 which only plays a role in transportation, then enters the large product final inspection scale 2, and is weighed by the large product final inspection scale 2.

Design selection of a double final scale mechanism:

the required scale length is first calculated (take tollens last check scale as an example).

TABLE 1 comparison of product length to final balance length

The length of the product is from 1245 + 3800mm, which corresponds to the length of the final scale of 2000 + 4500 mm. From table 1, it can be seen that a "jump" occurs at 2090mm article length, which is also the dividing line between the large and small articles, corresponding to a final checkweigher length of 2800mm, and we calculate the effect of 2800mm and 4500mm scale lengths on the linear velocity, as follows:

TABLE 2 data comparison of the effect of scale length of-2800 mm and 4500mm on linear velocity

Note: the first line of calculated speed is only a theoretical calculated value and does not represent the actual production speed.

From Table 2, it was found that the linear speed of extrusion was increased by 4.55 to 5.51m/min and the linear speed was increased by 15.39m/min (10.84 m/min in the case of using the 4500mm long scale) when the short scale (small product final inspection scale) of 2800mm was used for producing small products, as compared with the long scale (large product final inspection scale) of 4500 mm. Therefore, the layout of the long and short double scales in series can meet the requirement of high-speed production of large and small products on the same production line.

In summary, the present invention is not limited to the above embodiments, and those skilled in the art can provide other embodiments within the technical teaching of the present invention, but these embodiments are included in the scope of the present invention.

Claims (1)

1. The utility model provides a two final inspection balance mechanisms which characterized in that: the small product final inspection scale and the large product final inspection scale are connected in series, the small product final inspection scale is arranged close to a product input end, the length of the small product final inspection scale is 2800mm and used for weighing small products with the length of 1245-.