CN218640227U

CN218640227U - Injection mold for battery sealing ring

Info

Publication number: CN218640227U
Application number: CN202223046697.5U
Authority: CN
Inventors: 严瑞兴; 沈健焕
Original assignee: Fujian Nanping Nanfu Battery Co Ltd
Current assignee: Fujian Nanping Nanfu Battery Co Ltd
Priority date: 2022-11-16
Filing date: 2022-11-16
Publication date: 2023-03-17
Anticipated expiration: 2032-11-16

Abstract

The utility model provides an injection mold for a battery sealing ring, which comprises a first mold and a second mold, wherein a battery sealing ring injection molding cavity is formed between the first mold and the second mold; a first center hole and a second center hole are correspondingly formed in the first mold and the second mold one by one, an injection molding center needle is coaxially and tightly inserted into the first center hole, and the second center hole is used as a liquid inlet flow passage; a section of end surface, close to the inner edge, of the end surface, facing to one end of the first mold, of the second mold is a first sealing ring binding surface; the head end of the injection molding center needle penetrates through the battery sealing ring injection molding cavity, and a section of the end surface of the head end close to the outer edge of the end surface of the injection molding center needle is a second sealing ring binding surface; the inner edge of the first sealing ring binding face and the outer edge of the second sealing ring binding face are located at the same axial position, and an annular gap for passing injection molding liquid is reserved between the inner edge of the first sealing ring binding face and the outer edge of the second sealing ring binding face. The utility model discloses can reduce the burr of breaking the waste material to the production.

Description

Injection mold for battery sealing ring

Technical Field

The utility model belongs to injection mold accessory, especially an injection mold for battery seal circle.

Background

The structure of the existing battery sealing ring (such as the sealing ring of an alkaline dry battery) is as follows: the battery sealing ring comprises a central column positioned at the center and an annular sealing ring body which is formed by outwards extending the outer wall of the central column along the circumferential direction of the central column, wherein a central hole is formed in the central column, the upper end of the central column is a cathode cover mounting end, the outer peripheral edge of the sealing ring body is upwards bent and extended to form a battery steel shell contact part, and the inner wall of the battery steel shell contact part, the upper surface of the sealing ring body and the outer wall of the central column form an inner cavity of the battery sealing ring in a seamless enclosing mode.

The battery sealing ring mainly plays the roles of sealing the internal space of the battery, preventing the electrolyte of the battery from leaking in normal use and preventing the battery from exploding in abnormal use.

The battery sealing ring is a plastic product. The existing battery sealing ring injection mold (such as the publication number CN 217606927U) comprises two molds respectively located at two shaft ends of a battery sealing ring, a battery sealing ring injection molding cavity is formed by enclosing the two molds, central through holes are formed in the two molds along the central axis of the battery sealing ring, an injection molding central needle is inserted in the central through hole of any one mold in a close fit manner, the head of the injection molding central needle penetrates through the battery sealing ring injection molding cavity and extends to the other mold to form a distance in the central through hole, an annular flow channel is formed between the outer wall of the central mold and the hole wall of the central through hole of the upper mold, and an opening of the central through hole of the other mold, which deviates from one end of the injection molding central needle, is an injection molding raw material inlet. When the battery sealing ring is manufactured, firstly, raw materials of the battery sealing ring are heated and melted, then flow into the central through hole of the other mold from the injection raw material inlet, enter the battery sealing ring injection molding cavity through the annular flow channel, and then are cooled, solidified and separated from the battery sealing ring injection mold to manufacture the battery sealing ring.

When the battery sealing ring is cooled, solidified and separated from the battery sealing ring injection mold, the space occupied by the injection molding center needle after the injection molding center needle is drawn out can form the center hole of the battery sealing ring; simultaneously, the central through hole of another mould and the space that the annular runner corresponds can form the waste material handle with battery sealing washer body coupling, need break the waste material on the battery sealing washer after breaking away from battery sealing washer injection mold just can obtain the battery sealing washer, and the waste material (promptly "burr") often can remain with the hookup location of waste material handle when breaking the waste material handle, and the deburring needs the cost more manpower and time, does not clear the burr on the battery sealing washer and can influence the next process and stabilize production, and the burr has the potential quality hazard greatly.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an injection mold for battery seal circle, adopt this the burr reduces greatly when injection mold makes the battery seal circle and breaks the waste material handle, guarantees the stable production of next procedure, reduces the quality hidden danger.

An injection mold for a battery sealing ring comprises a first mold and a second mold which are oppositely arranged and can be close to or far away from each other, wherein a battery sealing ring injection molding cavity is formed between the first mold and the second mold; a first central hole and a second central hole which extend along the central axis of the battery sealing ring are correspondingly formed in the first die and the second die one by one, an injection molding central needle is coaxially and tightly inserted into the first central hole, and the second central hole is used as a liquid inlet flow channel; a section of end surface, close to the inner edge of the end surface of one end of the first mold, of the second mold, facing the end surface of one end of the first mold, is a first sealing ring binding surface; the head end of the injection molding center needle penetrates through the battery sealing ring injection molding cavity, and a section of the end surface of the head end of the injection molding center needle, which is close to the outer edge of the end surface, is a second sealing ring binding surface; when carrying out battery sealing washer injection moulding the interior border of first sealing washer binding face with the outer border of second sealing washer binding face is located same axial position, the interior border of first sealing washer binding face with leave the annular gap that supplies the liquid of moulding plastics to pass through between the outer border of second sealing washer binding face.

With current battery is in injection mold for the sealing washer center of moulding plastics needle inserts one section distance is compared in the second centre bore, adopts the utility model discloses a battery sealing washer that battery is obtained for the sealing washer is only annular gap department forms the connecting portion of battery sealing washer and waste material handle, and the battery sealing washer axial stroke of this connecting portion does not have, can reduce greatly and outwards break in the axial produced burr when the waste material handle guarantees next process and stabilizes production, reduces the quality hidden danger.

Preferably, the first sealing ring abutting surface is a plane perpendicular to the central axis of the battery sealing ring.

Preferably, the second sealing ring abutting surface is a plane perpendicular to the central axis of the battery sealing ring.

Preferably, the second mould is by the tubulose mouthful structure of moulding plastics that is located the center and coaxial fixed suit is in the outer annular mould body of mouthful structure of moulding plastics is constituteed, the lumen of mouthful structure of moulding plastics is regarded as the feed liquor runner, the utility model discloses a second mould comprises mouthful structure of moulding plastics and mould body two parts, and the two can select for use different materials as required to reach best result of use.

Preferably, the center position of the head end face of the injection molding center needle protrudes outwards to form a conical boss, and a section of the head end face between the bottom edge of the conical boss and the outer edge of the head end face is the second seal ring binding face. The central position of the end face of the head end of the injection molding central needle is designed into a conical boss in a pointed shape, and injection molding liquid formed after heating and melting can be distributed, so that the scouring force is reduced.

Drawings

Fig. 1 is a schematic sectional view of an injection mold for a battery gasket according to the present invention, wherein the direction indicated by an arrow is a flow direction of an injection liquid;

fig. 2 is a schematic cross-sectional structural diagram of the battery sealing ring with the waste handle, which is obtained by injection molding of the injection mold for the battery sealing ring of the present invention, wherein the dot-dash line is the central axis of the battery sealing ring.

Detailed description of the preferred embodiments

The following describes in detail preferred embodiments of the injection mold for a battery sealing ring according to the present invention with reference to the accompanying drawings:

as shown in fig. 1, an injection mold for a battery sealing ring comprises a first mold 10 and a second mold 20 which are oppositely arranged and can be close to or far away from each other, wherein a battery sealing ring injection cavity 30 is formed between the first mold 10 and the second mold 20; a first central hole 11 and a second central hole 21 extending along the central axis of the battery sealing ring are correspondingly formed in the first mold 10 and the second mold 20 one by one, an injection molding central needle 40 is coaxially and tightly inserted in the first central hole 11, and the second central hole 21 is used as a liquid inlet flow channel; a section of the end surface 22, close to the inner edge, of the end surface of the second mold 20 facing the end surface of the first mold 10 is a first sealing ring attaching surface; the head end of the injection molding center needle 40 penetrates through the battery sealing ring injection molding cavity 30, and a section of end surface 41, close to the outer edge, of the head end surface of the injection molding center needle 40 is a second sealing ring binding surface; when carrying out battery sealing washer injection moulding the interior border of first sealing washer laminating 22 with the outer border of second sealing washer binding face 41 is located same axial position, the interior border of first sealing washer binding face 22 with leave the annular gap 50 that supplies the liquid of moulding plastics to pass through between the outer border of second sealing washer binding face 41.

When injection moulding battery sealing washer, earlier with battery sealing washer raw materials heat melt the back by the feed liquor runner (promptly second centre bore 21) warp annular gap 50 flows into in the battery sealing washer mould plastics chamber 30, later the cooling solidification breaks away from first mould 10, second mould 20 and the centre needle 40 of moulding plastics, at this moment the space that battery sealing washer mould plastics chamber 30 corresponds can form the waste material of being connected with battery sealing washer 100 an organic whole and be 200 (as shown in fig. 2), breaks the waste material on the battery sealing washer 100 and obtains battery sealing washer 100 to 200.

With current battery is in injection mold for the sealing washer the center needle 40 that moulds plastics inserts one section distance is compared in the second centre bore 21, adopts the utility model discloses a battery sealing washer that battery is obtained for the sealing washer is only annular gap 50 department forms battery sealing washer 100 and waste material to the connecting portion of 200, and the battery sealing washer axial stroke of this connecting portion does not have, can reduce greatly and outwards break in the axial produced burr when the waste material is 200 guarantees next process stable production, reduces the quality hidden danger.

The first sealing ring abutting surface 22 is a plane perpendicular to the central axis of the battery sealing ring.

The second sealing ring abutting surface 41 is a plane perpendicular to the central axis of the battery sealing ring. The shape of the first and second

gasket abutment surfaces

22, 41 is generally determined by the shape of the battery gasket.

Preferably, as shown in fig. 1, the second mold 20 is sleeved with the annular mold body 202 outside the injection molding structure 201 by the tubular injection molding structure 201 and the coaxial fixing sleeve positioned at the center, the lumen of the injection molding structure 201 is used as the liquid inlet flow channel 21, the second mold 20 is composed of the injection molding structure 201 and the mold body 202, and the two can be made of different materials according to the requirement, so as to achieve the best use effect. Of course, the second mold 20 may be an integrally formed structure made of the same material.

Preferably, as shown in fig. 1, a central position of a head end surface of the injection molding center needle 40 protrudes outward to form a tapered boss 42, and a section of the head end surface 41 from a bottom edge of the tapered boss 42 to an outer edge of the head end surface is the second sealing ring attachment surface. The central position of the end face of the head end of the injection molding central needle 40 is designed to be a taper boss 42 in a pointed shape, so that injection molding liquid formed after heating and melting can be distributed, and the scouring force is reduced.

In the concrete implementation process, the periphery of battery sealing washer still can set up the side direction mould of laminating mutually with the outer peripheral wall of battery sealing washer, the side direction mould with first mould 10 with second mould 20 encloses together and closes the chamber 30 of moulding plastics of forming a complete battery sealing washer. The lateral mould is not shown in the drawings of the utility model.

The utility model discloses right the utility model belongs to the technical field of the ordinary skilled person, do not deviating from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. An injection mold for a battery sealing ring comprises a first mold and a second mold which are oppositely arranged and can be close to or far away from each other, wherein a battery sealing ring injection molding cavity is formed between the first mold and the second mold; a first central hole and a second central hole which extend along the central axis of the battery sealing ring are correspondingly formed in the first die and the second die one by one, an injection molding central needle is coaxially and tightly inserted into the first central hole, and the second central hole is used as a liquid inlet flow channel; a section of end surface, close to the inner edge of the end surface of one end of the first mold, of the second mold, facing the end surface of one end of the first mold, is a first sealing ring binding surface; the head end of the injection molding center needle penetrates through the battery sealing ring injection molding cavity, and a section of the end surface of the head end of the injection molding center needle, which is close to the outer edge of the end surface, is a second sealing ring binding surface; the method is characterized in that: when carrying out battery sealing washer injection moulding the interior border of first sealing washer binding face with the outer border of second sealing washer binding face is located same axial position, the interior border of first sealing washer binding face with leave the annular gap that supplies the liquid of moulding plastics to pass through between the outer border of second sealing washer binding face.

2. The injection mold for a battery seal ring according to claim 1, characterized in that: the first sealing ring binding surface is a plane perpendicular to the central axis of the battery sealing ring.

3. The injection mold for a battery seal ring according to claim 1, characterized in that: the second sealing ring binding surface is a plane perpendicular to the central axis of the battery sealing ring.

4. The injection mold for a battery seal ring according to claim 1, characterized in that: the second mould is in by the tubulose mouthful structure of moulding plastics that is located the center and coaxial fixed suit mould body outside the mouthful structure of moulding plastics constitutes, the lumen of mouthful structure of moulding plastics is regarded as the feed liquor runner.

5. The injection mold for a battery seal ring according to claim 1, characterized in that: the center position of the head end face of the injection molding center needle protrudes outwards to form a conical boss, and one section of the head end face between the bottom edge of the conical boss and the outer edge of the head end face is the second sealing ring binding face.