CN111409232A - Touch switch mold core for injection mold - Google Patents
Touch switch mold core for injection mold Download PDFInfo
- Publication number
- CN111409232A CN111409232A CN202010297280.2A CN202010297280A CN111409232A CN 111409232 A CN111409232 A CN 111409232A CN 202010297280 A CN202010297280 A CN 202010297280A CN 111409232 A CN111409232 A CN 111409232A
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- China
- Prior art keywords
- core block
- pressing
- core
- hole
- mold
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Classifications
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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
- B29C45/14065—Positioning or centering articles in the mould
Abstract
The invention relates to a mold core for a touch switch injection mold, which comprises a core block, wherein one side of the core block is set to be a molding side, the molding side of the core block is provided with a sprue, and the mold core further comprises at least one mounting hole formed in the molding side of the core block and at least one pressing component arranged in the mounting hole; the pressing component comprises a pressing rod connected in the mounting hole in a sliding manner and an elastic piece arranged in the mounting hole and used for pushing the pressing rod to the core block molding side; one end of the pressing rod close to the forming side of the core block is provided with a plurality of pressing bulges; and a pouring channel for communicating the pouring gate with the mounting hole is arranged on the core block molding side. The invention has the effect of effectively improving the waterproof property and the dustproof property of the manufactured and molded light-touch switch.
Description
Technical Field
The invention relates to the field of light-touch switch forming equipment, in particular to a mold core for a light-touch switch injection mold.
Background
The tact switch is a contact switch with a small volume, is turned on after being pressed, and is widely applied to various electronic products. The tact switch is composed of: the waterproof tact switch is composed of an insert, a base, an elastic sheet, a button and a cover plate, wherein a layer of polyimide film is added on the elastic sheet.
When the tact switch is produced, a base of the tact switch needs to be injection molded on the metal base material belt, other parts of the tact switch are installed in the base, and finally the assembled tact switch is cut off from the metal base material belt.
Referring to fig. 1, the mold core for the existing injection mold with the touch switch is installed on a front mold of the injection mold with the touch switch suspended in the mold core when in use, and comprises a core block 1, for convenience of description, one side of the core block 1 is set to be a molding side 11, a plurality of cavities are formed in the molding side 11 of the core block 1, a plurality of pressing pins 5 are fixedly connected in the cavities, and a pouring gate 2 communicated with the cavities is further arranged on the core block 1. When the base is injection molded on the metal base material belt, the front mold and the rear mold of the touch switch injection mold are closed, the metal base material belt is clamped between the core block 1 and the rear mold, a molding cavity of the base is formed between the core block 1 and the rear mold, meanwhile, the metal base material belt can be tightly pressed on the rear mold through the pressing pin 5, then liquid plastic is injected into the molding cavity through the pouring gate 2, the molding cavity is filled with the liquid plastic, after the liquid plastic is solidified to form the base, the front mold and the rear mold of the touch switch injection mold are separated, and injection molding of the base on the metal base material belt is completed.
In the injection molding process of the base, although the pressing needle 5 can tightly press the metal base material belt on the rear mold, the metal base material belt is prevented from being extruded and deflected by the liquid plastic when the liquid plastic is injected into the molding cavity; however, since the base contacts with the metal base material belt all the time in the whole base injection molding process, after the base injection molding is completed, a small hole is left on the base, so that the metal base material belt in the base is exposed outside, and finally the formed light-touch switch is poor in water resistance and dust resistance.
Disclosure of Invention
The invention aims to provide a mold core for a touch switch injection mold, which has the advantages that: the waterproof and dustproof performance of the manufactured and molded touch switch can be effectively improved.
The above object of the present invention is achieved by the following technical solutions: a mold core for a touch switch injection mold comprises a core block, wherein one side of the core block is set to be a molding side, the molding side of the core block is provided with a gate, the mold core further comprises at least one mounting hole formed in the molding side of the core block and at least one pressing component arranged in the mounting hole; the pressing component comprises a pressing rod connected in the mounting hole in a sliding manner and an elastic piece arranged in the mounting hole and used for pushing the pressing rod to the core block molding side; one end of the pressing rod close to the forming side of the core block is provided with a plurality of pressing bulges; and a pouring channel for communicating the pouring gate with the mounting hole is arranged on the core block molding side.
According to the technical scheme, when the light-touch switch injection mold is used, the mold core is embedded on the fixing plate of the front mold of the light-touch switch injection mold; when injection moulding base on the metal matrix area, dab switch injection mold's front mould and back mould and fold, support simultaneously on the depression bar to press protruding can be with the metal matrix area tightly pressing on the back mould under the effect of elastic component, then pour into liquid plastics through the runner, along with liquid plastics's injection into, liquid plastics can be to the downthehole extrusion of mounting support depression bar, thereby make to press protruding leaving metal matrix area, thereby make injection moulding's base can correspond the complete parcel of part with metal matrix area, thereby when solving the mould core base of moulding plastics before using, can leave the problem of aperture on the base, thereby promote the fashioned dabbing switch waterproof nature of final preparation and dirt proofness.
The invention is further configured to: the mounting holes comprise a first hole arranged on the molding side of the core block and a second hole arranged on one surface of the core block far away from the molding side of the core block, the first hole is communicated with the second hole, and the projection of the first hole on the molding side of the core block is positioned in the projection of the second hole on the molding side of the core block; an anti-release pin is fixed in the middle of the abutting rod and abuts against the bottom wall of one end, close to the first hole, of the second hole.
Through above-mentioned technical scheme, when dabbing switch injection mold's front mould and back mould separation, the condition that the depression bar deviates from the mounting hole can be avoided appearing with the cooperation of anticreep round pin to the mounting hole.
The invention is further configured to: the elastic piece is a spring, the elastic piece is positioned in the second hole and sleeved on the abutting rod, and one end of the elastic piece, which is close to the forming side of the core block, abuts against the anti-falling pin.
Through the technical scheme, firstly, the spring is low in cost, high in stability and not easy to damage; secondly, when the mold core is arranged on a fixed plate of a front mold of the touch switch injection mold, one end of the spring is abutted with the abutting rod, and the other end of the spring is abutted with the fixed plate; when the front mold and the rear mold of the injection mold are closed by touching the switch, the pressing protrusion on the pressing rod can be pressed on the metal base material belt, and the spring is in a compressed state, so that the pressing protrusion can press the metal base material belt more tightly and is not easy to deviate.
The invention is further configured to: and a step surface is processed in the middle of at least one side wall of the abutting and pressing rod, and one end of the spring, which is close to the core block, abuts against the anti-drop pin and one surface of the step surface, which is back to the molding side of the core block.
Through the technical scheme, if the step surface is not arranged, the spring can rotate around the abutting rod when the abutting rod slides along the mounting hole in a reciprocating manner, so that the anti-drop pin can enter the spring; the arrangement of the step surface effectively avoids the situation.
The invention is further configured to: the pressing protrusion is conical, and the conical bottom surface of the pressing protrusion is connected with the corresponding end surface of the pressing rod.
Through above-mentioned technical scheme, the toper is supported and is pressed protruding can be pressed the area of metal matrix more firm, makes metal matrix material area more difficult emergence skew.
The invention is further configured to: the pressing bulges are distributed on the end face of the pressing rod in a rectangular shape.
Through above-mentioned technical scheme, can press the metal matrix area more firm, make metal matrix material area more difficult emergence skew.
The invention is further configured to: the mounting holes and the pressing components are four in number, and the four mounting holes correspond to the four pressing components one to one.
Through the technical scheme, the single mold core can be matched with the four bases of the back mold injection molding, and the production efficiency is greatly improved.
In conclusion, the beneficial technical effects of the invention are as follows:
1. the problem that small holes are left in a base when the base is subjected to injection molding by using a mold core before use is solved, so that the water resistance and the dust resistance of a finally manufactured and molded tact switch are improved;
2. when the mold core is arranged on a fixed plate of a front mold of the touch switch injection mold, one end of the spring is abutted against the abutting rod, and the other end of the spring is abutted against the fixed plate; when the front mold and the rear mold of the injection mold are closed by the tact switch, the pressing protrusion on the pressing rod can press on the metal base material belt, and the spring is in a compressed state, so that the pressing protrusion can press the metal base material belt more tightly and is less prone to deviation;
3. the condition that the anti-drop pin enters the spring can be effectively avoided by processing the step surface on the side wall of the abutting rod.
Drawings
FIG. 1 is a schematic view of a conventional mold core for a tact switch injection mold;
FIG. 2 is a schematic view of the overall structure of the present invention;
FIG. 3 is a cross-sectional view of a structure embodying mounting holes;
FIG. 4 is an enlarged view at A in FIG. 2;
FIG. 5 is a schematic view showing the structure of the elastic member and the pressing rod;
fig. 6 is a schematic view showing a state in which a mold core for a tact switch injection mold is mounted on a fixed plate.
In the figure, 1, a pellet; 11. molding side; 2. a gate; 21. pouring a channel groove; 3. mounting holes; 31. a first hole; 32. a second hole; 4. a pressing component; 41. a pressing rod; 42. an elastic member; 43. pressing the protrusion; 44. the anti-drop pin; 5. and pressing the needle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.
Example (b):
referring to fig. 2 and 3, the mold core for the injection mold of the tact switch disclosed by the invention comprises a core block 1 in a rectangular shape, and the lower side of the core block 1 is set as a molding side 11 for convenience of description; the forming side 11 of the core block 1 is provided with four mounting holes 3 penetrating through the core block 1, and each mounting hole 3 is internally provided with a pressing component 4; in particular, the mounting holes 3 are stepped holes comprising a first hole 31 made on the molding side 11 of the core 1 and a second hole 32 made on the upper side of the core 1 and communicating with the first hole 31, it being noted that: the projection of the first hole 31 on the molding side 11 of the core block 1 is rectangular and is located within the projection of the second hole 32 on the molding side 11 of the core block 1. The core block 1 is provided with a gate 2 penetrating the upper side of the core block 1 and the molding side 11 of the core block 1, and the molding side 11 of the core block 1 is further provided with a gate groove 21 communicating the gate 2 with the mounting hole 3. It is worth noting that: the runner groove 21 is more close to the mounting hole 3 and the runner groove 21 is shallower, so that the thickness of the joint of the injection molding waste and the base is thinner after the injection molding work is finished, and the base can be conveniently cut off from the metal material belt by workers.
Referring to fig. 2 and 3, the pressing component 4 includes a pressing rod 41 penetrating through the mounting hole 3 and slidably fitting with the mounting hole 3, an elastic member 42 disposed in the mounting hole 3 for pushing the pressing rod 41 toward the molding side 11 of the core block 1, and a plurality of pressing protrusions 5 distributed in a rectangular shape at one end of the pressing rod 41 close to the molding side 11 of the core block 1 and integrally molded with the pressing rod 41, and in combination with fig. 4, the pressing protrusions 5 are conical, and the conical bottom surfaces of the pressing protrusions 5 are connected to the corresponding end surfaces of the pressing rods 41.
With reference to fig. 3 and 5, a disengagement preventing pin 44 is connected to the middle of the pressing rod 41, specifically: a through hole penetrating through two opposite side walls of the abutting rod 41 is formed in the middle of the abutting rod 41, and the anti-falling pin 44 penetrates through the through hole and is in interference fit with the through hole; anti-slip pin 44 is located within second bore 32; when the anti-drop pin 44 abuts against the bottom wall of the second hole 32 near the end of the first hole 31, the end of the pressing rod 41 near the molding side 11 of the core block 1 will protrude out of the first hole 31, and the end of the pressing cylinder far from the molding side 11 of the core block 1 is located in the second hole 32 and at a distance from the upper side of the core block 1. The elastic element 42 is a spring, which is sleeved on the portion of the pressing rod 41 inside the second hole 32, and one end of the spring close to the molding side 11 of the core block 1 abuts on the anti-drop pin 44, and one end of the spring away from the molding side 11 of the core block 1 extends out of the second hole 32. In order to avoid the situation that the anti-drop pin 44 enters the spring due to the fact that the abutting rod 41 slides back and forth along the mounting hole 3 in the using process of the spring, a step surface is machined on the side wall of the abutting rod 41, which is connected with the anti-drop pin 44, and one end, close to the core block 1, of the spring abuts against the anti-drop pin 44 and one surface, opposite to the molding side 11 of the core block 1, of the step surface.
With reference to fig. 6, when in use, the mold core is embedded on a fixing plate of a front mold of the tact switch injection mold; at this time, the spring is in a compressed state, one end of the spring abuts against the anti-drop pin 44 and the step surface, and the other end abuts against the fixing plate; the abutment lever 41 projects out of the first hole 31 under the action of the spring.
When a base is injection molded on a metal base material belt, a front mold and a rear mold of an injection mold are closed by touching with a light touch, meanwhile, a pressing rod 41 retracts into a mounting hole 3, a pressing bulge 5 on the pressing rod 41 can tightly press the metal base material belt on the rear mold under the action of an elastic piece 42, a primary cavity is formed between a mold core and the rear mold, then liquid plastic is injected into the primary cavity through a pouring gate 2, the liquid plastic can extrude the pressing rod 41 into the mounting hole 3 along with the injection of the liquid plastic, so that the pressing rod 41 is pressed against a fixed plate, the pressing bulge 5 leaves the metal base material belt, a complete cavity is formed between the mold core and the rear mold, the liquid plastic is cooled and solidified for a period of time to form the base, although pits caused by the existence of the pressing bulge 5 exist on the base but do not penetrate through the metal base material belt, and therefore, when the mold core is used for injection molding the base, the problem of small holes can be left on the base, so that the water resistance and the dust resistance of the finally manufactured and molded tact switch are improved.
In addition, when the front mold and the rear mold of the touch switch injection mold are separated, due to the arrangement of the elastic piece 42, the core block 1 is separated from the metal material belt and the base, and then the pressing rod 41 is separated from the base; thus, the situation that the base is torn due to the fact that the core block 1 and the abutting rod 41 are separated from the base at the same time can be effectively avoided.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (7)
1. The utility model provides a dabbing switch mold core for injection mold, includes pellet (1), sets for one side of pellet (1) and is shaping side (11), pellet (1) shaping side (11) are equipped with runner (2), characterized by: the core block molding device also comprises at least one mounting hole (3) arranged on the molding side (11) of the core block (1) and at least one pressing component (4) arranged in the mounting hole (3); the pressing component (4) comprises a pressing rod (41) connected in the mounting hole (3) in a sliding manner and an elastic piece (42) arranged in the mounting hole (3) and used for pushing the pressing rod (41) to the molding side (11) of the core block (1); one end of the pressing rod (41) close to the molding side (11) of the core block (1) is provided with a plurality of pressing bulges (5); and a runner groove (21) for communicating the sprue (2) with the mounting hole (3) is arranged on the molding side (11) of the core block (1).
2. The mold core for the tact switch injection mold according to claim 1, wherein: the mounting hole (3) comprises a first hole (31) formed in the molding side (11) of the core block (1) and a second hole (32) formed in the surface, far away from the molding side (11) of the core block (1), the first hole (31) is communicated with the second hole (32), and the projection of the first hole (31) on the molding side (11) of the core block (1) is located in the projection of the second hole (32) on the molding side (11) of the core block (1); an anti-disengaging pin (44) is fixed in the middle of the abutting rod (41), and the anti-disengaging pin (44) abuts against the bottom wall of one end, close to the first hole (31), of the second hole (32).
3. The mold core for the tact switch injection mold according to claim 2, wherein: the elastic piece (42) is a spring, the elastic piece (42) is positioned in the second hole (32) and sleeved on the abutting rod (41), and one end, close to the forming side (11) of the core block (1), of the elastic piece (42) abuts on the anti-falling pin (44).
4. The mold core for the tact switch injection mold according to claim 3, wherein: a step surface is processed in the middle of at least one side wall of the abutting-pressing rod (41), and one end of the spring close to the core block (1) abuts against the anti-falling pin (44) and one surface of the step surface, which faces away from the molding side (11) of the core block (1).
5. The mold core for the tact switch injection mold according to claim 1, wherein: the pressing protrusion (5) is conical, and the conical bottom surface of the pressing protrusion (5) is connected with the corresponding end surface of the pressing rod (41).
6. The mold core for the tact switch injection mold according to claim 1, wherein: the pressing protrusions (5) are distributed on the end face of the pressing rod (41) in a rectangular shape.
7. The mold core for the tact switch injection mold according to claim 1, wherein: the four mounting holes (3) and the four pressing components (4) are arranged, and the four mounting holes (3) correspond to the four pressing components (4) one to one.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911151040 | 2019-11-21 | ||
| CN2019111510405 | 2019-11-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111409232A true CN111409232A (en) | 2020-07-14 |
Family
ID=71488372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010297280.2A Pending CN111409232A (en) | 2019-11-21 | 2020-04-15 | Touch switch mold core for injection mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111409232A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4470786A (en) * | 1981-07-28 | 1984-09-11 | Omron Tateisi Electronics Co. | Molding apparatus with retractable preform support pins |
| CN1608825A (en) * | 2003-10-17 | 2005-04-27 | 韩国凤凰有限公司 | Die device for in-die injection moulding |
| WO2009012313A1 (en) * | 2007-07-18 | 2009-01-22 | Johnson Controls Technology Company | Method of tensioning coverstock and forming vehicle interior components using retractable pins |
| CN106660231A (en) * | 2014-06-24 | 2017-05-10 | Nok株式会社 | Insert molding die structure |
-
2020
- 2020-04-15 CN CN202010297280.2A patent/CN111409232A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4470786A (en) * | 1981-07-28 | 1984-09-11 | Omron Tateisi Electronics Co. | Molding apparatus with retractable preform support pins |
| CN1608825A (en) * | 2003-10-17 | 2005-04-27 | 韩国凤凰有限公司 | Die device for in-die injection moulding |
| WO2009012313A1 (en) * | 2007-07-18 | 2009-01-22 | Johnson Controls Technology Company | Method of tensioning coverstock and forming vehicle interior components using retractable pins |
| CN106660231A (en) * | 2014-06-24 | 2017-05-10 | Nok株式会社 | Insert molding die structure |
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Application publication date: 20200714 |
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| RJ01 | Rejection of invention patent application after publication |