Device and method for eccentricity detection and thickness measurement during cable insulation and sheath extrusion

Abstract

A device for eccentricity detection and thickness measurement during cable insulation and sheath extrusion. The device comprises: a dial (1), a sliding rail (2), a sliding block (3), a pointer (4) and a measuring mechanism (5), wherein the dial (1) is mounted on an end face of the head of an extruder; a surface of the dial (1) is configured with angular graduations; the sliding rail (2) and the dial (1) are concentrically arranged and mounted on the head; the sliding block (3) is slidably arranged on the sliding rail (2); the pointer (4) is connected to the sliding block (3) and points to the angular graduations; the measuring mechanism (5) is connected to the sliding block (3); and the measuring mechanism (5) is configured to measure the size of a material discharged from the head. The sliding block (3) drives the measuring mechanism (5) to measure at least three identical positions on a surface of a preceding semi-finished product (10) and a surface of an extruded product, so as to calculate whether an extruded layer (11) is eccentric relative to the preceding semi-finished product (10); and the thickness of the extruded layer (11) can be calculated if the extruded layer (11) is not eccentric.

Description

Device and method for eccentricity detection and thickness measurement during cable insulation and sheath extrusion

[0001] The present application relates to the technical field of cable insulation and sheath production, in particular to a device and method for eccentricity detection and thickness measurement during cable insulation and sheath extrusion. BACKGROUND

[0002] Cable extrusion is an important link in the production process of cables, which mainly involves uniformly coating plastic, rubber or other insulating materials on the cable core through an extruder to form an insulation layer or an outer sheath.

[0003] During the insulation and sheath extrusion process of cable production and manufacturing, the thickness and eccentricity control of the extruded layer is the key to cable quality control. If the insulation or sheath is eccentric or the thickness does not meet the requirements, it will have an adverse effect on the electrical and mechanical properties of the cable.

[0004] In the current production of cable insulation and sheath, skilled operators mainly use the method of manual stripping and measurement, that is, repeated eccentricity adjustment, extrusion, cooling, stripping and measurement. This process relies heavily on the vision and operation skill level of the employees, has a high error rate, especially the soft silicone rubber extruded from the head is easily deformed during stripping, resulting in a large error in eccentricity measurement. Moreover, the repeated stripping process with a sharp tool greatly increases the safety hazards during production, is time-consuming and labor-intensive, increases labor costs, and reduces measurement efficiency. SUMMARY

[0005] The device for eccentricity detection and thickness measurement during cable insulation and sheath extrusion provided by the embodiments of the present application solves the problem of how to detect eccentricity and measure thickness more quickly, accurately and safely during the cable insulation and sheath extrusion process. The embodiments of the present application also disclose a method for eccentricity detection and thickness measurement during cable insulation and sheath extrusion.

[0006] The first aspect of the present application provides a device for eccentricity detection and thickness measurement during cable insulation and sheath extrusion, comprising:

[0007] A dial is installed at the end face of the head of the extruder, and an angle scale is arranged on the surface of the dial around the extrusion port of the head;

[0008] A slide rail is concentrically arranged with the dial and installed on the head;

[0009] A sliding block is slidingly arranged on the slide rail;

[0010] A pointer is connected to the sliding block and points to the angle scale;

[0011] A measurement mechanism is connected to the sliding block, and the measurement mechanism is used to measure the size of the material discharged from the head.

[0012] The beneficial effects of the above-mentioned embodiments are that the thickness of the extruded layer can be calculated by measuring the size of the previous semi-finished product and the product after extrusion, and the same position of at least three positions on the surface of the previous semi-finished product and the product after extrusion is measured by the measuring mechanism driven by the sliding block, so that whether the extruded layer is eccentric relative to the previous semi-finished product can be calculated. Therefore, the device is arranged on the head, manual stripping for measurement can be avoided, work efficiency, measurement accuracy and safety of the operation process are greatly improved, and labor cost is reduced.

[0013] On the basis of the above-mentioned embodiments, the embodiments of the present application can also be improved as follows:

[0014] In one of the embodiments of the present application, the support is further included, one end of the support is connected to the sliding block, and the other end of the support is connected to the measuring mechanism. The beneficial effect of this step is that the measuring mechanism is arranged at the front end of the sliding block through the support, so that the convenience of installation of the measuring mechanism is improved, and the measuring mechanism is convenient for manual use at the front side of the head.

[0015] In one of the embodiments of the present application, the first positioning member is further included, the first positioning member is connected to the sliding block and is used for positioning the sliding block on the slide rail. The beneficial effect of this step is that the stability of positioning of the sliding block is improved.

[0016] In one of the embodiments of the present application, the connecting sleeve is further included, the connecting sleeve is installed on the sliding block, the connecting sleeve is provided with a slide, and the measuring mechanism is slidably inserted into the connecting sleeve; and the second positioning member is further included, the second positioning member is connected to the connecting sleeve and is used for positioning the measuring mechanism. The beneficial effect of this step is that the position of the measuring mechanism is convenient for adjusting, so that the positioning mechanism is positioned at a suitable measurement position.

[0017] In one of the embodiments of the present application, the connecting sleeve is hingedly connected to the sliding block. The beneficial effect of this step is that the degree of freedom of the measuring mechanism is further improved, so that the measuring mechanism can be arbitrarily adjusted in the plane, thereby the measuring mechanism is conveniently positioned at an accurate measurement position.

[0018] In one of the embodiments of the present application, the measuring mechanism adopts an electronic caliper; or the measuring mechanism includes a ruler body and a measuring rod, the ruler body is connected to the sliding block, the ruler body has a length scale, the measuring rod is connected to the ruler body, and the measuring rod is used for being attached to the previous semi-finished product or the product after extrusion.

[0019] The first aspect of the present application provides a method for detecting eccentricity and measuring thickness during extrusion of cable insulation and sheath, and the method adopts the device for detecting eccentricity and measuring thickness during extrusion of cable insulation and sheath, and includes the following steps:

[0020] Step S1: Rotate the sliding block to take a plurality of angles an measuring the size A corresponding to the pre-sequence semi-finished product by using the measuring mechanism n wherein n is a natural number greater than or equal to 3;

[0021] Step S2: after extruding a section of extrusion layer on the pre-sequence semi-finished product, according to a n corresponding angle re-measuring the corresponding size B n ;

[0022] Step S3: calculating T n =B n -A n , if the values of T n are the same, recording T n as the thickness of the extrusion layer, otherwise, entering Step S4;

[0023] Step S4: returning to Step S1 for the head adjusting the relative position of the mold core, and returning to Step S2 for the head adjusting the relative position of the mold jacket.

[0024] The above embodiment has the beneficial effect that the eccentricity and thickness of the extrusion layer can be measured at the same time, which assists the operator in adjusting the head. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual proportions.

[0026] Fig. 1 is a first structural schematic view of the eccentricity detection and thickness measurement device;

[0027] Fig. 2 is a sectional view of part of the structure of the eccentricity detection and thickness measurement device;

[0028] Fig. 3 is a left view of Fig. 1;

[0029] Fig. 4 is a schematic view of part of the structure of the eccentricity detection and thickness measurement device;

[0030] Fig. 5 is a structural schematic view of a connecting plate;

[0031] Fig. 6 is a structural schematic view of a measuring mechanism.

[0032] In the drawings, 1 is a scale disc, 2 is a sliding rail, 3 is a sliding block, 301 is a guide groove, 4 is a pointer, 5 is a measuring mechanism, 6 is a bracket, 601 is a connecting plate, 602 is a hinged hole, 603 is an adjusting hole, 7 is a first positioning member, 8 is a connecting sleeve, 9 is a second positioning member, 10 is a pre-sequence semi-finished product, and 11 is an extrusion layer. Embodiments of the present application

[0033] In the present application, unless otherwise explicitly specified and limited, the terms in the present application should be understood in a broad sense, such as the connection can be fixed connection, can also be detachable connection or integral, can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of different terms in the present application can be understood according to the specific circumstances, and the scope of the specific meaning should be limited to the function of the present application.

[0034] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation to the present application.

[0035] Embodiment one

[0036] As shown in FIGS. 1-4, a device for eccentricity detection and thickness measurement of cable insulation and sheath extrusion includes a scale disc 1, a slide rail 2, a slide block 3, a pointer 4, and a measuring mechanism 5. The scale disc 1 is installed on the end face of the head of an extruder, and the surface of the scale disc 1 is provided with an angular scale around the extrusion port of the head. The slide rail 2 is concentrically arranged with the scale disc 1 and is installed on the head. The slide block 3 is slidingly arranged on the slide rail 2. The pointer 4 is connected to the slide block 3 and points to the angular scale. The measuring mechanism 5 is connected to the slide block 3, and the measuring mechanism 5 is used to measure the size of the material discharged from the head.

[0037] Specifically, as shown in FIGS. 3 and 4, the scale disc 1 is a circular ring structure, the scale disc 1 is connected to the head of the extruder by bolts, the scale disc 1 is parallel to the front end face of the head, the scale disc 1 is perpendicular to the discharge direction of the head, and the outer end face (the surface away from the head) of the scale disc 1 is provided with a scale of °360 around the discharge center.

[0038] Specifically, as shown in FIGS. 3 and 4, the slide rail 2 is installed on the front side of the head and is coaxial with the scale disc 1, the diameter of the slide rail 2 is smaller than the diameter of the scale disc 1, the slide block 3 includes a front block body and a rear block body, the front block body and the rear block body are connected by bolts, a guide groove 301 is formed between the front block body and the rear block body corresponding to the slide rail 2, and the slide block 3 is slidingly sleeved on the outer side of the slide rail 2 through the guide groove 301.

[0039] Specifically, as shown in FIGS. 3-5, the device further comprises a bracket 6, one end of the bracket 6 is connected to the sliding block 3, and the other end is connected to the measuring mechanism 5. Among them, the bracket 6 is provided with a connecting plate 601 at the end, and the connecting plate 601 is directly connected with the measuring mechanism 5. The measuring mechanism 5 is arranged at the front end of the sliding block 3 through the bracket 6, which improves the convenience of installing the measuring mechanism 5 and facilitates manual use of the measuring mechanism 5 at the front side of the machine head.

[0040] Specifically, as shown in FIG. 4, the device further comprises a first positioning member 7 connected to the sliding block 3 and used for positioning the sliding block 3 on the slide rail 2. Among them, the first positioning member 7 adopts a bolt, and the first positioning member 7 is threadedly connected to the front block body. When the first positioning member 7 is pressed against the surface of the slide rail 2, the sliding block 3 is positioned on the slide rail 2, thereby improving the stability of the positioning of the sliding block 3.

[0041] Specifically, as shown in FIGS. 3 and 6, the device further comprises a connecting sleeve 8 and a second positioning member 9, the second positioning member 9 is installed on the sliding block 3 through the connecting sleeve 8, the connecting sleeve 8 is provided with a sliding channel, the measuring mechanism 5 is slidingly inserted into the connecting sleeve 8, and the second positioning member 9 is connected to the connecting sleeve 8 and used for positioning the measuring mechanism 5. Among them, the second positioning member 9 adopts a bolt, and the bolt is threadedly connected to the connecting sleeve 8. When the bolt is pressed against the measuring mechanism 5, the measuring mechanism 5 is positioned. When the bolt is loosened, the measuring mechanism 5 can slide along the direction of the sliding channel to adjust the position of the measuring mechanism 5, thereby facilitating positioning of the positioning mechanism at a suitable measuring position.

[0042] Specifically, as shown in FIGS. 3 and 5, the connecting sleeve 8 is hingedly connected to the sliding block 3. Among them, the connecting plate 601 is provided with a hinged hole 602, and two circular arc-shaped adjusting holes 603 are provided around the hinged hole 602 as the center. The connecting sleeve 8 is inserted into the hinged hole 602 and the adjusting hole 603 through a bolt and locked on the other side of the connecting plate 601 through a nut, thereby fixing the connecting sleeve 8 to the connecting plate 601. When it is necessary to adjust the angle of the connecting sleeve 8, the nut only needs to be loosened. Through the hinged connection mode, the freedom degree of the measuring mechanism 5 is further improved, so that the measuring mechanism 5 can be arbitrarily adjusted in the plane, thereby facilitating positioning of the measuring mechanism 5 at an accurate measuring position.

[0043] Specifically, the measuring mechanism 5 adopts an electronic caliper, or the measuring mechanism 5 comprises a ruler body and a measuring rod. The ruler body is connected to the sliding block 3 and has a length scale. The measuring rod is connected to the ruler body and is used for being attached to the front sequence semi-finished product 10 or the outer periphery of the extrusion coated product. The above two kinds of measuring mechanisms 5 both have a positioning end. When the measuring mechanism 5 is installed, a straight line passing through the positioning end is at the position of the center axis of the machine head.

[0044] By measuring the dimensions of the preceding semi-finished product 10 and the extruded product using the measuring mechanism 5, the thickness of the extruded layer 11 can be calculated. The measuring mechanism 5, driven by the slider 3, measures at least three identical locations on the surface of the preceding semi-finished product 10 and the extruded product, which can calculate whether the extruded layer 11 is eccentric relative to the preceding semi-finished product 10. Therefore, by installing this device at the machine head, manual peeling can be avoided for measurement, greatly improving work efficiency and measurement accuracy, and reducing labor costs.

[0045] Example 2

[0046] A method for detecting eccentricity and measuring thickness during cable insulation and sheath extrusion, employing the apparatus for detecting eccentricity and measuring thickness during cable insulation and sheath extrusion disclosed in Example 1, includes the following steps:

[0047] Step S1: Rotate slider 3 and take several angles α using pointer 4. n The measuring mechanism 5 is used to measure the dimension A corresponding to the previous semi-finished product. n , where n is a natural number greater than or equal to 3;

[0048] Step S2: After extruding a section of the extruded layer onto the preceding semi-finished product, according to a n The corresponding dimension B is remeasured at the corresponding angle. n ;

[0049] Step S3: Calculate T n =B n -A n If T n If all values ​​are the same, it indicates that the thickness of the extruded layer is uniform. Record T. n If the extruded layer thickness is specified, proceed to step S4;

[0050] Step S4: For machine heads that adjust the relative position of the mold core, return to step S1; for machine heads that adjust the relative position of the mold sleeve, return to step S2.

[0051] To improve measurement accuracy, values ​​need to be taken in all four quadrants of the dial 1 (dividing 360° into four equal parts).

[0052] By the above method, in the step of adjusting eccentricity in the production of cable insulation and sheath, the extruded layer is not stripped repeatedly with a sharp tool, which greatly reduces the safety hazard in the production process, saves the labor cost and time cost, and provides a simple method for measuring the eccentricity and thickness of the easily deformed silicon rubber material just produced. The method for measuring the thickness of the cable insulation and sheath is more scientific, and the determination of the thickness is more accurate, the error is greatly reduced, and the measurement of the eccentricity and thickness of the extruded layer 11 can be realized at the same time. Through comparison between the difference values at different positions, the specific value of the corresponding position of the extruded layer 11 can be known, which can better assist the operator to adjust the eccentricity of the head.

[0053] The above is only an embodiment of the present application, and common knowledge such as specific structures and characteristics in the scheme is not described in detail here. The person skilled in the art knows all the ordinary technical knowledge in the field of the present application before the filing date or the priority date, can know all the prior art in the field, and has the ability to apply conventional experimental means before that date. The person skilled in the art can perfect and implement the present scheme based on the disclosure given in the present application and their own ability. Some typical known structures or known methods should not be an obstacle for the person skilled in the art to implement the present application. It should be noted that, for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application. These will not affect the effect and practicality of the present application.

Claims

1. A device for eccentricity detection and thickness measurement of cable insulation and jacketing during extrusion, characterized in that, The device comprises: a dial plate installed on the end face of the head of the extruder, the surface of the dial plate being provided with an angular scale around the extrusion port of the head; a slide rail concentrically arranged with the dial plate and installed on the head; a slide block slidingly arranged on the slide rail; a pointer connected to the slide block and pointing to the angular scale; a measuring mechanism connected to the slide block, the measuring mechanism being used to measure the size of the material discharged from the head.

2. The apparatus of claim 1, wherein, Further comprising: a bracket having one end connected to the slide block and the other end connected to the measuring mechanism.

3. The apparatus of claim 1, wherein, Further comprising: a first positioning member connected to the slide block and used to position the slide block on the slide rail.

4. The apparatus of claim 1, wherein, Further comprising: a connecting sleeve installed on the slide block, the connecting sleeve being provided with a slide channel, and the measuring mechanism being slidingly inserted into the connecting sleeve; a second positioning member connected to the connecting sleeve and used to position the measuring mechanism.

5. The apparatus of claim 4, wherein, The connecting sleeve is hingedly connected to the slide block.

6. The apparatus of claim 1, wherein, The measuring mechanism adopts an electronic caliper. Alternatively, the measuring mechanism comprises a ruler body and a measuring rod, the ruler body being connected to the slide block, the ruler body being provided with a length scale, and the measuring rod being connected to the ruler body and used to be attached to the previous semi-finished product or the extruded product.

7. A method of eccentricity detection and thickness measurement of cable insulation and jacketing during extrusion, characterized in that, The device for detecting eccentricity and measuring thickness during extrusion of cable insulation and sheath according to any one of claims 1-6 comprises the following steps: Step S1: rotate the slider to take several angles a n , using the measuring mechanism to measure the size A corresponding to the pre-sequence semi-finished product n , wherein n is a natural number greater than or equal to 3; Step S2: after extruding a segment of extruded layer on said pre-sequence semi-finished product, according to a n Corresponding angular re-measurement of corresponding dimension B n ; Step S3: Calculate T n = B n - A n , if the values of T n are the same, record T n as the extrusion layer thickness, otherwise go to Step S4; Step S4: for the head adjusting the relative position of the die core, return to step S1, and for the head adjusting the relative position of the die sleeve, return to step S2.

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