CN212712190U - Winding core for diaphragm paper forming - Google Patents

Abstract

The utility model discloses a roll core for diaphragm paper forming, which comprises a smooth roll core body, wherein the roll core body is cylindrical, a central hole is arranged in the roll core body along the axial direction of the roll core body, and the lower end part of the roll core body is a roll paper part; the roll paper portion is provided with at least a set of wear-resisting unit along its axial, the quantity of wear-resisting unit is the same with the quantity of belt, and every wear-resisting unit of group includes six to ten strip grooves of seting up along roll paper portion circumference equidistant, and each strip groove is with the transition of rolling up core body surface circular arc, and the length on the long limit in strip groove slightly is greater than the width of belt, and the interval in adjacent strip groove is less than the length of the minor face in one strip groove. The utility model discloses along the bar groove that stock form portion circumference equidistant was seted up, not only be convenient for process to each bar groove has guaranteed with the circular arc transition of rolling up core body surface smooth no burr, and is even with belt frictional force during the rotation, has promoted the life of rolling up the core.

Description

Winding core for diaphragm paper forming

Technical Field

The utility model relates to a battery processing field especially relates to a roll up core for diaphragm paper shaping.

Background

Battery separator paper is a critical component of batteries and directly affects the performance and shelf life of the battery. At present, the manufacture of AA and AAA battery diaphragms is completed by a diaphragm manufacturing machine through the operation of rolling paper materials into cylindrical structures. The diaphragm making machine mainly comprises a paper material transmission mechanism, a winding core, a guide block and a belt pulley mechanism, wherein the paper material transmission mechanism is used for the transmission of paper materials, the winding core is used for winding the paper materials to form a cylinder shape, the guide block guides the transmitted paper materials so that the paper materials can be wound on the winding core, and a belt of the belt pulley mechanism is wound on the outer side of the guide block and is in contact with the winding core so that the paper materials are tightly attached to the winding core. After the coiling, the bottom of the diaphragm paper needs to be coiled and then the paper is scalded for sealing, then the central ejector rod penetrates out of the through hole of the coiling core to press the bottom of the diaphragm paper, and finally the coiling core rises and the diaphragm paper is separated from the coiling core.

In order to increase the friction force between the diaphragm paper and the winding core so as to roll the diaphragm paper smoothly, the winding section of the winding core is usually provided with a toothed straight knurled pattern. But discovery turns over after inserting inside battery steel casing with the diaphragm scroll and rises when breaking away from with the diaphragm scroll, and the straight line annular knurl line of book core scratches the diaphragm paper easily, produces the defective products to production through a period of time, insection surface is worn and torn easily, leads to frictional force not enough, makes the book core scrap. On the other hand, the central ejector rod penetrates through the central hole of the winding core, and as the central hole is the equal-diameter through hole, when the winding core is lifted vertically, part of paper scrap powder can be drilled into the central hole and attached to the inner wall of the winding core, so that the smoothness of the inner wall of the winding core is influenced, and the winding core can be scrapped due to the fact that the central ejector rod cannot penetrate smoothly in the past, and the service life of the winding core is shortened. In view of this, it is desirable to improve the existing diaphragm paper winding core structure to improve the yield and the service life of the winding core.

Disclosure of Invention

An object of the utility model is to provide a be used for fashioned book core of diaphragm paper.

Realize the utility model discloses the technical scheme of purpose is: the utility model provides a roll up core for diaphragm paper shaping, it includes the glossy core body that rolls up, it is cylindric to roll up the core body, has seted up the centre bore along its axial in the core body, the diameter and the central ejector pin diameter adaptation of centre bore, and the lower tip that rolls up the core body is stock form portion, the stock form portion is provided with at least a set of wear-resisting unit along its axial, the quantity of wear-resisting unit is the same with the quantity of belt, and every wear-resisting unit of group includes six to ten strip grooves of offering along stock form portion circumference equidistant, and each strip groove is with roll up core body surface circular arc transition, and the length on the long limit in strip groove slightly is greater than the width of belt, and the interval in adjacent strip groove is.

Furthermore, the bottom outlet of the central hole expands towards the outer wall of the core-winding body to form a flaring, so that the paper scrap powder is basically gathered between the gap between the central ejector rod and the flaring section, the adhesion of the paper scrap powder to the inner wall of the core-winding body is reduced, and the service life of the core-winding body is prolonged.

The utility model discloses change intensive straight line annular knurl line into six to ten strip grooves of offering along stock form portion circumference equidistant, the processing of not only being convenient for to each strip groove has guaranteed with the transition of rolling up core body surface circular arc that smooth surface does not have the burr, and is even with belt frictional force during rotation, has promoted the life of rolling up the core.

Drawings

Fig. 1 is a schematic structural diagram of a diaphragm making machine according to an embodiment of the present invention;

fig. 2 is a schematic view of a partial sectional structure of a roll core according to an embodiment of the present invention;

fig. 3 is a schematic sectional view taken along the line a-a in fig. 2.

Detailed Description

The following description of the preferred embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1 to 3, a winding core for diaphragm paper forming includes a smooth winding core body 1, the winding core body 1 is cylindrical, a central hole 11 is formed in the winding core body along an axial direction of the winding core body, a diameter D of the central hole 11 is adapted to a diameter of a central ejector rod (not shown), a lower end of the winding core body 1 is a roll paper portion 12, the roll paper portion 12 is provided with two sets of wear-resistant units 13 along an axial direction of the roll paper portion 12, each set of wear-resistant units 13 includes eight strip grooves 131 formed at equal intervals along a circumferential direction of the roll paper portion 12, each strip groove 131 is in arc transition with a surface of the winding core body 1, a length of a long edge 1311 of each strip groove 131 is slightly larger than a width a of a belt 10, and an interval between adjacent strip grooves 131 is; the bottom outlet 111 of the central hole 11 expands towards the outer wall of the reeling core body 1 to form a flaring. Taking AA battery processing as an example, the diameter D of the central hole of the winding core body is 4.2 +/-0.05 mm, and the diameter B of the bottom outlet of the central hole is 4.98 +/-0.05 mm.

The number of the wear-resistant units of the utility model is the same as that of the belt, and the number of the strip-shaped grooves of each group of wear-resistant units is limited to six to ten channels, so as to take account of the friction force between the roll core and the belt when in work and the smoothness of the surface of the roll core; the depth of the strip-shaped groove is not limited, and those skilled in the art can easily understand that, in order to facilitate the chamfering of the strip-shaped groove and the arc on the surface of the winding core body, the strip-shaped groove is usually a shallow groove.

The above only be the embodiment of the utility model discloses a not consequently restriction the patent scope of the utility model, all utilize the equivalent flow transform that the content of the specification was made, or direct or indirect application is in other relevant technical field, all including on the same reason the utility model discloses a patent protection within range.

Claims (2)

1. The utility model provides a roll up core for diaphragm paper shaping, it includes glossy roll core body, roll up the core body and be cylindric, roll up this internal center bore of having seted up along its axial of core, the diameter and the central ejector pin diameter adaptation of center bore, the lower tip that rolls up the core body is stock form portion, its characterized in that: the roll paper portion is provided with at least a set of wear-resisting unit along its axial, the quantity of wear-resisting unit is the same with the quantity of belt, and every wear-resisting unit of group includes six to ten strip grooves of seting up along roll paper portion circumference equidistant, and each strip groove is with the transition of rolling up core body surface circular arc, and the length on the long limit in strip groove slightly is greater than the width of belt, and the interval in adjacent strip groove is less than the length of the minor face in one strip groove.

2. The winding core for diaphragm paper forming of claim 1, wherein: and the bottom outlet of the central hole expands towards the outer wall of the roll core body to form a flaring.

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