CN103200515A

CN103200515A - Extrusion die of internal magnetic loudspeaker U iron

Info

Publication number: CN103200515A
Application number: CN2013101082610A
Authority: CN
Inventors: 高建华; 王志强
Original assignee: NINGBO KEGAO ELECTROACOUSTIC CO Ltd
Current assignee: NINGBO KEGAO ELECTROACOUSTIC CO Ltd
Priority date: 2013-03-29
Filing date: 2013-03-29
Publication date: 2013-07-10
Anticipated expiration: 2033-03-29
Also published as: CN103200515B

Abstract

The invention discloses an extrusion die of an internal magnetic loudspeaker U iron. The extrusion die comprises an upper die component with a concave die cavity, a lower die component with a convex die (13), and an ejection mechanism. A U iron (15) is arranged in a mold cavity formed by the concave die cavity and the convex die (13). The ejection mechanism comprises a piece ejecting device (12) and an ejector rod (11). The ejector rod (11) is slidably connected in the lower die component. The lower end of the piece ejecting device (12) is fixedly connected with the top end of the ejector rod (11). The piece ejecting device (12) is sleeved outside the convex die (13) in a connecting mode and is slidably matched with the convex die (13). The top face of the piece ejecting device (12) abuts against an end face of an opening end of the U iron (15). Through adoption of the structure, the extrusion die can prevent the U iron from deforming, cracking and the like in the demoulding process, improves percent of pass of products, improves production efficiency, and reduces production cost.

Description

The extrusion die of interior magnetic speaker U iron

Technical field

The present invention relates to the technical field of acoustical generator, the extrusion die of the interior magnetic speaker U iron of using when specifically being a kind of the manufacturing.

Background technology

At present, known loud speaker is made up of magnetic circuit system, vibrational system and support system, and wherein the magnet in the magnetic circuit system can be divided into T iron and U iron usually.U iron generally has the interior concave space that can place magnetite, during use magnetite and voice coil loudspeaker voice coil are placed in the interior concave space of U iron, then with the U ferropexy on the basin frame.Usually, U iron is to form by the die drawn moulding, and the drawing die of prior art comprises cope match-plate pattern, punch, die, lower bolster and guide pillar, punch is fixed on the lower bolster, die is fixed on the cope match-plate pattern, and an end of guide pillar is connected with lower bolster, and the other end and cope match-plate pattern are slidingly matched; In addition, be provided with ejecting mechanism in punch inside, when the demoulding, cope match-plate pattern drove upwards disengagement of die before this, upwards the top was thrown off by U iron from punch by ejecting mechanism again.But there is following shortcoming in the U iron drawing die of this structure:

1) because ejecting mechanism is arranged on punch center deployment, push rod contacts with the bottom surface of U iron, therefore, the contact area of push rod and U iron is little, to be subjected to the active force of push rod bigger in the bottom surface of U iron when U iron is thrown off from punch, thereby U iron bottom surface is produced distortion, even the root of bottom surface and sidewall can be subjected to destruction to a certain degree and produce the phenomenon of cracking, cause product rejection;

2) in addition, the opening part sidewall of some U iron has outwards outstanding snap ring outward, and the U iron of this structure is realized through twice stretching in the prior art, therefore, have two pairs of moulds and finish the operation of these twice, increase production cost on the one hand, production efficiency is reduced greatly.

Summary of the invention

Technical problem to be solved by this invention is, provides a kind of and when the demoulding, can avoid making U iron to produce phenomenons such as distortion, cracking, thus the qualification rate of raising product, and the extrusion die of the interior magnetic speaker U iron that can enhance productivity, reduce production costs.

For solving the problems of the technologies described above; the extrusion die of magnetic speaker U iron in provided by the invention; comprise the upper die component with matrix cavity, following membrane module and the ejecting mechanism with punch; U iron is placed in the die cavity of matrix cavity and punch formation; described ejecting mechanism comprises ejector and push rod; push rod is slidingly connected at down in the membrane module; fixedly connected with the push rod top in the lower end of ejector; ejector is socketed in outside the punch and with punch and is slidingly matched, and the openend end face of the end face of ejector and U iron offsets.

Described upper die component comprises guide rod, punch holder, drift, upper cavity die circle stress and upper cavity die, described guide rod close-fitting is in punch holder, punch holder is fixedlyed connected with the upper cavity die circle stress, the top of drift is positioned at the upper cavity die circle stress, the lower part of drift is positioned at upper cavity die, the upper cavity die close-fitting is in upper cavity die circle stress lower end, and the lower surface of guide rod and the upper surface of drift push against, and upper cavity die, drift form the fovea superior die cavity.

Described membrane module down comprises lower bolster, punch retainer, lower cavity die circle stress and lower cavity die, described lower bolster, punch retainer and lower cavity die circle stress are fixedly connected sequentially from the bottom up, punch is positioned at punch retainer, and the lower cavity die close-fitting is in the lower cavity die circle stress; Lower cavity die, ejector and punch form recessed die cavity.

The opening part sidewall of described U iron has outwards outstanding snap ring outward, and the recessed die cavity place of corresponding lower cavity die has cannelure.

After adopting above structure, the present invention compared with prior art has the following advantages:

1) because the upper surface of ejector is annular, the contact area of it and U iron is bigger, and therefore, from the punch during the demoulding, the active force that is subjected to ejector is less, is out of shape just little at U iron;

2) simultaneously, the ejecting force that U iron is subjected to is not positioned at the bottom surface, but the end face of circle wall, in other words, around active force moved on to from the center, therefore, can avoid the root of U iron bottom surface and circle wall that the phenomenon of cracking takes place, thereby reduce the scrappage of product;

3) in addition, the recessed die cavity place of lower cavity die be provided with U iron on the cannelure that matches of snap ring after, the twice extrusion process can be concentrated on one time extrusion molding, only need one pair of mould just can realize, reduce production costs on the one hand, production efficiency is improved greatly.

Description of drawings

Accompanying drawing is the structural representation of the extrusion die of magnetic speaker U iron in the present invention.

Wherein: 1, guide rod; 2, punch holder; 3, drift; 4, upper cavity die circle stress; 5, upper cavity die; 6, snap ring; 7, lower cavity die circle stress; 8, lower cavity die; 9, punch retainer; 10, lower bolster; 11, push rod; 12, ejector; 13, punch; 14, cannelure; 15, U iron.

Embodiment

Below in conjunction with the drawings and specific embodiments the present invention is done explanation in further detail.

By the structural representation of the extrusion die of magnetic speaker U iron in the present invention shown in the drawings as can be known, it comprises the upper die component with matrix cavity, following membrane module and the ejecting mechanism with punch 13, and U iron 15 is placed in the die cavity that matrix cavity and punch 13 form.Described ejecting mechanism comprises ejector 12 and push rod 11, push rod 11 is slidingly connected at down in the membrane module, fixedly connected with push rod 11 tops in the lower end of ejector 12, ejector 12 is socketed in outside the punch 13 and with punch 13 and is slidingly matched, and the openend end face of the end face of ejector 12 and U iron 15 offsets.

Described upper die component comprises guide rod 1, punch holder 2, drift 3, upper cavity die circle stress 4 and upper cavity die 5, described guide rod 1 close-fitting is in punch holder 2, punch holder 2 is fixedlyed connected with upper cavity die circle stress 4, the top of drift 3 is positioned at upper cavity die circle stress 4, the lower part of drift 3 is positioned at upper cavity die 5, upper cavity die 5 close-fittings are in upper cavity die circle stress 4 lower ends, and the upper surface of the lower surface of guide rod 1 and drift 3 pushes against, and upper cavity die 5 and drift 3 form the fovea superior die cavity.

Described membrane module down comprises lower bolster 10, punch retainer 9, lower cavity die circle stress 7 and lower cavity die 8, described lower bolster 10, punch retainer 9 and lower cavity die circle stress 7 are fixedly connected sequentially from the bottom up, punch 13 is positioned at punch retainer 9, and lower cavity die 8 close-fittings are in lower cavity die circle stress 7.Lower cavity die 8, ejector 12 and punch 13 form recessed die cavity.

The opening part sidewall of described U iron 15 has outwards outstanding snap ring 6 outward, and the recessed die cavity place of corresponding lower cavity die 8 has cannelure 14.

Claims

1. the extrusion die of magnetic speaker U iron in a kind, comprise the upper die component with matrix cavity, following membrane module and ejecting mechanism with punch (13), U iron (15) is placed in the die cavity of matrix cavity and punch (13) formation, it is characterized in that: described ejecting mechanism comprises ejector (12) and push rod (11), push rod (11) is slidingly connected at down in the membrane module, fixedly connected with push rod (11) top in the lower end of ejector (12), ejector (12) is socketed in outside the punch (13) and with punch (13) and is slidingly matched, and the openend end face of the end face of ejector (12) and U iron (15) offsets.

2. the extrusion die of magnetic speaker U iron in according to claim 1, it is characterized in that: described upper die component comprises guide rod (1), punch holder (2), drift (3), upper cavity die circle stress (4) and upper cavity die (5), described guide rod (1) close-fitting is in punch holder (2), punch holder (2) is fixedlyed connected with upper cavity die circle stress (4), the top of drift (3) is positioned at upper cavity die circle stress (4), the lower part of drift (3) is positioned at upper cavity die (5), upper cavity die (5) close-fitting is in upper cavity die circle stress (4) lower end, the upper surface of the lower surface of guide rod (1) and drift (3) pushes against, and upper cavity die (5) and drift (3) form the fovea superior die cavity.

3. the extrusion die of magnetic speaker U iron in according to claim 1, it is characterized in that: described membrane module down comprises lower bolster (10), punch retainer (9), lower cavity die circle stress (7) and lower cavity die (8), described lower bolster (10), punch retainer (9) and lower cavity die circle stress (7) are fixedly connected sequentially from the bottom up, punch (13) is positioned at punch retainer (9), and lower cavity die (8) close-fitting is in lower cavity die circle stress (7); Lower cavity die (8), ejector (12) and punch (13) form recessed die cavity.

4. the extrusion die of magnetic speaker U iron in according to claim 3 is characterized in that: the opening part sidewall of described U iron (15) has outwards outstanding snap ring (6) outward, and the recessed die cavity place of corresponding lower cavity die (8) has cannelure (14).