CN107839145B - Forming and manufacturing method of waterproof silica gel sealing ring of metal card holder - Google Patents
Forming and manufacturing method of waterproof silica gel sealing ring of metal card holder Download PDFInfo
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- CN107839145B CN107839145B CN201710998293.0A CN201710998293A CN107839145B CN 107839145 B CN107839145 B CN 107839145B CN 201710998293 A CN201710998293 A CN 201710998293A CN 107839145 B CN107839145 B CN 107839145B
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- silica gel
- metal card
- sealing ring
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- card support
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C2045/1486—Details, accessories and auxiliary operations
- B29C2045/14868—Pretreatment of the insert, e.g. etching, cleaning
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Adornments (AREA)
Abstract
The invention relates to the technical field of metal card support manufacturing, in particular to a method for forming and manufacturing a waterproof silica gel sealing ring of a metal card support, which comprises the following steps of firstly providing the metal card support, wherein the metal card support is provided with a waterproof silica gel sealing ring forming area and a non-forming area; then at least the junction of the waterproof sealing ring forming area and the non-forming area of the metal card support is subjected to treatment of blocking or smearing a silica gel release agent; then placing the obtained metal card support into a forming die, and injecting a liquid silica gel sealing ring on the metal card support through the forming die; and finally, taking out the metal card support from the forming die, and treating the periphery of the silica gel sealing ring on the metal card support to obtain the metal card support with the waterproof silica gel sealing ring. The periphery of the obtained silica gel sealing ring is simple and convenient to process, even has no rough edges, the purpose of injection molding of the liquid silica gel sealing ring on the metal clamping support is achieved, and meanwhile, the problems of rough edges of silica gel and the like are effectively solved; simple process, high productivity, high rate of finished products and low production cost.
Description
Technical Field
The invention relates to the technical field of metal card support manufacturing, in particular to a manufacturing method of a waterproof sealing ring of a metal card support.
Background
With the continuous development of terminal technology, mobile communication terminals such as smart phones and tablet computers are widely used, and generally, SIM cards need to be installed in terminals such as mobile phones. At present, different mobile communication terminals adopt different SIM card placing methods, for example, a part of terminals need to open the rear cover (and battery) of the terminal, and install the SIM card at the reserved SIM installation position, which makes the operation of installing the SIM card more cumbersome; and a part of terminals are provided with a push-out SIM card seat, and the SIM card seat is taken out by an ejection mechanism by utilizing the lever principle. In order to enable the mobile terminal to achieve the appearance effect of all-metal integration, the metal card support is more and more widely applied, but most of the metal card supports in the prior industry do not have a waterproof function.
Then, a sealing ring is sleeved on the metal clamp support or a liquid silica gel sealing ring is injected to achieve the waterproof purpose, and the movable sleeved sealing ring still has insufficient sealing property and short service life; therefore, the liquid silica gel sealing ring is a favored method for the trade company through injection molding, but in the prior art, the injection molding liquid silica gel sealing ring can cause the problem of silica gel burr unmanageable, thereby affecting the productivity, lowering the yield and increasing the production cost.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for molding and manufacturing a waterproof silica gel sealing ring of a metal card holder, so that the liquid silica gel sealing ring is injection molded on the metal card holder, and the problems of silica gel burrs and the like are effectively solved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for forming and manufacturing a waterproof silica gel sealing ring of a metal card holder comprises the following steps:
s1, providing a metal card support, wherein the metal card support is provided with a waterproof silica gel sealing ring forming area and a non-forming area;
s2, at least, blocking or smearing a silica gel release agent on the junction of the waterproof sealing ring forming area and the non-forming area of the metal card support;
s3, placing the metal card support obtained in the step S2 into a forming die, and injecting a liquid silicone rubber sealing ring on the metal card support through the forming die;
s4, taking out the metal card support from the forming die, and processing the periphery of the silica gel sealing ring on the metal card support to obtain the metal card support with the waterproof silica gel sealing ring.
The scheme is further as follows: the blocking treatment of the step S2 is to perform injection molding on a plurality of engineering plastics at the edge sealing position of the waterproof sealing ring molding area; then putting the molded semi-finished product into a molding die for liquid silica gel molding; after the silica gel is formed in a liquid state, a plurality of engineering plastics formed at the edge sealing glue position of the former waterproof sealing ring forming area are peeled by using a tool, and the metal card support with the waterproof silica gel sealing ring can be obtained.
The scheme is further as follows: the step S2 of applying the silica gel release agent is to cover the waterproof sealing ring molding area with a profiling shielding jig or rubber ring, then apply the silica gel release agent on the metal clamping support at the periphery of the shielding jig or rubber ring, and after baking, take down the shielding jig or rubber ring; and then the processed metal card holder is placed into a forming die for forming.
The scheme is further as follows: the step S2 of coating the silica gel release agent is to coat the metal card holder with the silica gel release agent; then, engraving the surface metal layer of the waterproof sealing ring molding area together with a release agent by using laser; then the metal card holder which is carved by the laser is placed into a forming die and injected with liquid silica gel for forming.
The scheme is further as follows: the forming die is provided with a front die core and a rear die core, the front die core and the rear die core are matched to form a forming cavity, the front die core and the rear die core are manufactured on the basis of a beryllium bronze substrate, and a first elastic hole is formed in the part, close to the forming cavity, of the front die core; and a second elastic hole is formed in the part, close to the molding cavity, of the rear mold core.
The scheme is further as follows: and the parting surfaces of the front mold core and the rear mold core are respectively provided with a slope clearance of minus 0.03mm from the glue position part of the molding cavity.
The scheme is further as follows: the first elastic hole and the second elastic hole are both arranged in parallel with the molding cavity; a row of first elastic holes are arranged on the front side of the molding cavity, a row of second elastic holes are arranged on the rear side of the molding cavity, and the first elastic holes and the second elastic holes are symmetrical relative to the opposite molding surfaces; the sections of the first elastic hole and the second elastic hole are both circular.
The scheme is further as follows: the front mold core and the rear mold core are in a convex shape, concave elastic grooves are arranged at corners of the shapes of the front mold core and the rear mold core, and inner groove surfaces of the elastic grooves are cambered surfaces.
The invention provides a method for forming and manufacturing a waterproof silica gel sealing ring of a metal card holder, which comprises the steps of separating or coating a silica gel release agent on the junction of a waterproof sealing ring forming area and a non-forming area of the metal card holder; after the liquid silica gel sealing ring is placed in a forming mold for injection molding, the obtained silica gel sealing ring is simple and convenient to process at the periphery, even has no rough edges, achieves the purpose of injection molding of the liquid silica gel sealing ring on the metal clamping support, and effectively solves the problems of rough edges of silica gel and the like; simple process, high productivity, high rate of finished products and low production cost.
The invention has the further advantage that the front mold core and the rear mold core of the forming mold are manufactured on the basis of the beryllium bronze substrate, the part of the front mold core, which is close to the forming cavity, is provided with the first elastic hole, the part of the rear mold core, which is close to the forming cavity, is provided with the second elastic hole, the pressure damage to the metal card holder arranged in the forming cavity can be effectively reduced through the action of the elastic holes, the glue can be better sealed, the burr-free forming of the waterproof sealing ring of the metal card holder is realized, and the problems of silica gel burrs and the like are effectively solved.
Description of the drawings:
FIG. 1 is a schematic flow chart of an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a second embodiment of the present invention;
FIG. 3 is a schematic flow chart of three embodiments of the present invention;
FIG. 4 is a schematic structural view of a forming mold according to the present invention;
fig. 5 is a partially enlarged schematic view of the embodiment of fig. 4.
The specific implementation mode is as follows:
the conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Referring to fig. 1, 2 and 3, which are schematic views of a preferred embodiment of the present invention, the present invention relates to a method for forming a metal card holder waterproof silicone sealing ring, comprising the following steps:
s1, providing a metal card holder 10, wherein the metal card holder 10 is provided with a waterproof silica gel sealing ring forming area 101 and a non-forming area; the waterproof silica gel sealing ring forming area 101 is appropriately designed with a structure for increasing adhesive force of glue injection forming, such as holes, concave-convex lines and the like.
S2, at least, the boundary of the waterproof sealing ring forming area 101 and the non-forming area of the metal card support is blocked or coated with a silica gel release agent.
And S3, placing the metal card support obtained in the step S2 into a forming die, and injecting and molding a liquid silicone rubber sealing ring on the metal card support through the forming die.
S4, taking out the metal card holder from the forming die, and processing the periphery of the silica gel sealing ring 20 on the metal card holder 10 to obtain the metal card holder with the waterproof silica gel sealing ring.
Referring to fig. 1, the blocking treatment of step S2 is to perform injection molding with a plurality of engineering plastics at the edge sealing position of the waterproof sealing ring forming area to obtain a blocking unit 30; and then placing the formed semi-finished product into a forming die for liquid silica gel forming, and after the silica gel is formed in a liquid state, stripping the separation unit 30 formed at the edge sealing glue position of the former waterproof sealing ring forming area by using a tool to obtain the metal card holder with the waterproof silica gel sealing ring. Through a plurality of engineering plastics protection of post forming, realize the no deckle edge shaping of liquid silica gel, simultaneously effectual reduction is to the crushing of metal card support.
Referring to fig. 2, in the step S2, the step of applying the silica gel releasing agent includes covering the waterproof sealing ring forming region with a profiling shielding jig or rubber ring 40, applying the silica gel releasing agent on the metal card holder at the periphery of the shielding jig or rubber ring 40, and after baking, removing the shielding jig or rubber ring 40; and then the processed metal card support is placed into a forming die for forming, the metal card support is taken out from the forming die, the periphery of the silica gel sealing ring 20 on the metal card support 10 is processed, and the burrs of the silica gel sealing ring 20 are greatly conveniently processed by utilizing the action of a silica gel release agent, so that the metal card support with the waterproof silica gel sealing ring is obtained.
Referring to fig. 3, in the step S2, the step of applying the silica gel release agent is to apply the silica gel release agent on the metal card holder; then, engraving the surface metal layer of the waterproof sealing ring molding area together with a release agent by using laser; then the metal card holder which is carved by the laser is placed into a forming die and injected with liquid silica gel for forming. And finally, taking out the metal card holder from the forming die, and treating the periphery of the silica gel sealing ring 20 on the metal card holder 10, wherein the burrs of the silica gel sealing ring 20 are greatly conveniently treated under the action of a silica gel release agent, so that the metal card holder with the waterproof silica gel sealing ring is obtained.
Referring to fig. 4 and 5, the forming process of the present invention may employ a forming mold having a front mold core 1 and a rear mold core 2, wherein the front mold core 1 and the rear mold core 2 are assembled to form a forming cavity 3, and the forming cavity 3 satisfies the forming of the metal card-holder waterproof sealing ring. The front mold core 1 and the rear mold core 2 are made of beryllium bronze base materials, have high strength, hardness, elastic limit and fatigue limit, are small in elastic lag, and are beneficial to improving the injection molding effect. A first elastic hole 11 is arranged at the position of the front mold core 1 close to the molding cavity 3, and a second elastic hole 21 is arranged at the position of the rear mold core 2 close to the molding cavity 3; through the effect in first elasticity hole 11 and second elasticity hole 21 can effectual reduction press to the metal card support of putting into the die cavity in to can be better seal the glue, accomplish that the metal card holds in the palm waterproof sealing washer and does not have the deckle edge shaping, the yield is high, reduction in production cost.
In the embodiment shown in fig. 4 and 5, the parting surfaces of the front core 1 and the rear core 2 are each inclined at a negative 0.03mm from the glue portion of the molding cavity 3, i.e., the clearances indicated by L1 and L2 in the drawings. This structural design makes front mould benevolence 1 and back mould benevolence 2 receive the compound die power of make-up machine after, obtains corresponding elastic buffer, can effectual reduction to the crushing of arranging the metal card support in the shaping chamber in, enables the die joint compound die of front mould benevolence 1 and back mould benevolence 2 more accurate, inseparabler simultaneously, realizes better being used for of from this and seals the glue, accomplishes the unhairing limit shaping.
As shown in fig. 4 and 5, in this embodiment, the first elastic holes 11 and the second elastic holes 21 are both arranged in parallel with the molding cavity 3, a row of first elastic holes 11 is arranged on the front side of the molding cavity 3, a row of second elastic holes 21 is arranged on the rear side of the molding cavity 3, the first elastic holes 11 and the second elastic holes 21 are symmetrical with respect to the parting plane, and are symmetrically buffered and pressurized front and back, so that the pressure damage to the metal card holders placed in the molding cavity is effectively reduced, and the sealing adhesive can be better sealed. In this embodiment, the cross sections of the first elastic hole 11 and the second elastic hole 21 are preferably circular, so that the elasticity is good and the service life is long.
In the embodiment shown in fig. 4, the outer contours of the front mold core 1 and the rear mold core 2 are convex, an inward concave elastic groove 4 is formed at the corner of the outer contours of the front mold core 1 and the rear mold core 2, and the inner groove surface of the elastic groove 4 is a cambered surface. This structure is from external design, optimizes the compound die of front mould benevolence 1 and back mould benevolence 2, plays the crushing of effectively reducing the metal card support to arranging in the die cavity equally to can be better seal glue.
As shown in fig. 4, in the implementation of the present invention, a metal card holder 10 to be injection molded is placed in a molding cavity 3, a front mold core 1 and a rear mold core 2 are closed, and then liquid silica gel is injected into the molding cavity 3, so as to achieve the purpose of waterproof by injection molding of a silica gel seal ring 20 on the metal card holder 10. And in the forming process, through the effect of the first elastic hole 11 of front mould benevolence 1 and the second elastic hole 21 of back mould benevolence 2, and front mould benevolence 1 and back mould benevolence 2 die joint play respectively from the gluey position part of shaping chamber 3 and do inclination clearance isostructure design such as minus 0.03mm, can effectual reduction press the hurting of putting in the metal card support in the shaping chamber in, and can be better glue, accomplish that the metal card holds in the palm the shaping of waterproof sealing washer unhairing limit, the yield is high, reduction in production cost.
The present invention has been described in detail with reference to the embodiments, but the technical concept and the features of the present invention are not limited thereto, and it is intended that the present invention is implemented by those skilled in the art, and therefore, all equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (4)
1. A method for forming and manufacturing a waterproof silica gel sealing ring of a metal card holder is characterized by comprising the following steps: the manufacturing method comprises the following steps:
s1, providing a metal card support, wherein the metal card support is provided with a waterproof silica gel sealing ring forming area and a non-forming area;
s2, at least performing barrier treatment on the junction of the waterproof sealing ring forming area and the non-forming area of the metal card support; the blocking treatment is that a plurality of engineering plastics are firstly subjected to injection molding at the edge sealing position of the waterproof sealing ring molding area; then putting the molded semi-finished product into a molding die for liquid silica gel molding; after the silica gel is formed in a liquid state, stripping a plurality of engineering plastics formed at the edge sealing glue position of the former waterproof sealing ring forming area by using a tool, and obtaining the metal card support with the waterproof silica gel sealing ring; the forming die is provided with a front die core and a rear die core, the front die core and the rear die core are matched to form a forming cavity, the front die core and the rear die core are manufactured on the basis of a beryllium bronze substrate, and a first elastic hole is formed in the part, close to the forming cavity, of the front die core; a second elastic hole is formed in the part, close to the molding cavity, of the rear mold core; the first elastic hole and the second elastic hole are both arranged in parallel with the molding cavity; a row of first elastic holes are arranged on the front side of the molding cavity, a row of second elastic holes are arranged on the rear side of the molding cavity, and the first elastic holes and the second elastic holes are symmetrical relative to the opposite molding surfaces; the sections of the first elastic hole and the second elastic hole are both circular; and the parting surfaces of the front mold core and the rear mold core are respectively provided with a slope clearance of minus 0.03mm from the glue position part of the molding cavity.
2. A method for forming and manufacturing a waterproof silica gel sealing ring of a metal card holder is characterized by comprising the following steps: the manufacturing method comprises the following steps:
s1, providing a metal card support, wherein the metal card support is provided with a waterproof silica gel sealing ring forming area and a non-forming area;
s2, at least coating a silica gel release agent on the junction of the waterproof sealing ring forming area and the non-forming area of the metal card support; the step of coating the silica gel release agent is to cover a waterproof sealing ring forming area by using a copying shielding jig or a rubber ring, then coat the silica gel release agent on a metal clamping support at the periphery of the shielding jig or the rubber ring, and take down the shielding jig or the rubber ring after baking; then placing the treated metal card support into a forming mold, and injecting a liquid silica gel sealing ring on the metal card support through the forming mold; the forming die is provided with a front die core and a rear die core, the front die core and the rear die core are matched to form a forming cavity, the front die core and the rear die core are manufactured on the basis of a beryllium bronze substrate, and a first elastic hole is formed in the part, close to the forming cavity, of the front die core; a second elastic hole is formed in the part, close to the molding cavity, of the rear mold core; the first elastic hole and the second elastic hole are both arranged in parallel with the molding cavity; a row of first elastic holes are arranged on the front side of the molding cavity, a row of second elastic holes are arranged on the rear side of the molding cavity, and the first elastic holes and the second elastic holes are symmetrical relative to the opposite molding surfaces; the sections of the first elastic hole and the second elastic hole are both circular; the parting surfaces of the front mold core and the rear mold core are respectively provided with a slope clearance of minus 0.03mm from the glue position part of the molding cavity;
and taking out the metal card support from the forming die, and treating the periphery of the silica gel sealing ring on the metal card support to obtain the metal card support with the waterproof silica gel sealing ring.
3. A method for forming and manufacturing a waterproof silica gel sealing ring of a metal card holder is characterized by comprising the following steps: the manufacturing method comprises the following steps:
s1, providing a metal card support, wherein the metal card support is provided with a waterproof silica gel sealing ring forming area and a non-forming area;
s2, at least coating a silica gel release agent on the junction of the waterproof sealing ring forming area and the non-forming area of the metal card support; the step of coating the silica gel release agent is to coat the metal card holder with the silica gel release agent; then, engraving the surface metal layer of the waterproof sealing ring molding area together with a release agent by using laser; then putting the metal card holder carved by the laser into a forming die and injecting liquid silica gel for forming; the forming die is provided with a front die core and a rear die core, the front die core and the rear die core are matched to form a forming cavity, the front die core and the rear die core are manufactured on the basis of a beryllium bronze substrate, and a first elastic hole is formed in the part, close to the forming cavity, of the front die core; a second elastic hole is formed in the part, close to the molding cavity, of the rear mold core; the first elastic hole and the second elastic hole are both arranged in parallel with the molding cavity; a row of first elastic holes are arranged on the front side of the molding cavity, a row of second elastic holes are arranged on the rear side of the molding cavity, and the first elastic holes and the second elastic holes are symmetrical relative to the opposite molding surfaces; the sections of the first elastic hole and the second elastic hole are both circular; the parting surfaces of the front mold core and the rear mold core are respectively provided with a slope clearance of minus 0.03mm from the glue position part of the molding cavity;
and taking out the metal card support from the forming die, and treating the periphery of the silica gel sealing ring on the metal card support to obtain the metal card support with the waterproof silica gel sealing ring.
4. The method for forming and manufacturing the metal card holder waterproof silica gel sealing ring according to any one of claims 1 to 3, characterized in that: the front mold core and the rear mold core are in a convex shape, concave elastic grooves are arranged at corners of the shapes of the front mold core and the rear mold core, and inner groove surfaces of the elastic grooves are cambered surfaces.
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CN203876132U (en) * | 2014-05-21 | 2014-10-15 | 东莞市方振塑胶电子制品有限公司 | Waterproof molding structure of plastic component |
CN104640395A (en) * | 2014-11-27 | 2015-05-20 | 东莞劲胜精密组件股份有限公司 | SD (secure digital) card with waterproofing function and manufacturing method of SD card |
CN107116749A (en) * | 2017-07-07 | 2017-09-01 | 通达(厦门)精密橡塑有限公司 | A kind of injection molding process |
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