KR20080112788A - Non-contact high-frequency induction resin injection apparatus for plastic mold - Google Patents
Non-contact high-frequency induction resin injection apparatus for plastic mold Download PDFInfo
- Publication number
- KR20080112788A KR20080112788A KR1020070061682A KR20070061682A KR20080112788A KR 20080112788 A KR20080112788 A KR 20080112788A KR 1020070061682 A KR1020070061682 A KR 1020070061682A KR 20070061682 A KR20070061682 A KR 20070061682A KR 20080112788 A KR20080112788 A KR 20080112788A
- Authority
- KR
- South Korea
- Prior art keywords
- molten resin
- injection
- nozzle
- heating
- resin injection
- Prior art date
Links
- 238000002347 injection Methods 0.000 title claims abstract description 132
- 239000007924 injection Substances 0.000 title claims abstract description 132
- 239000011347 resin Substances 0.000 title claims abstract description 88
- 229920005989 resin Polymers 0.000 title claims abstract description 88
- 230000006698 induction Effects 0.000 title claims abstract description 81
- 238000010438 heat treatment Methods 0.000 claims abstract description 76
- 238000001746 injection moulding Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 38
- 239000007921 spray Substances 0.000 description 21
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Images
Classifications
-
- 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
- B29C45/20—Injection nozzles
- B29C45/22—Multiple nozzle systems
-
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2725—Manifolds
-
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2737—Heating or cooling means therefor
-
- 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
- B29C45/72—Heating or cooling
- B29C45/74—Heating or cooling of the injection unit
-
- 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
1 is a coupling state diagram of a non-contact high frequency induction molten resin injection apparatus of a multi-point gate method according to the invention.
FIG. 2 is an enlarged cross-sectional view of the multi-gate gate injection nozzle of FIG. 1.
3 is a control block diagram of a multi-point gate spray nozzle according to the present invention.
4 is a state diagram of the combined state of the non-contact high-frequency induction molten resin injection apparatus of the multi-point gate method according to another embodiment of the present invention.
* Explanation of symbols for the main parts of the drawings
100, 200: non-contact high frequency induction molten resin injection device of multi-point gate method
10:
20a, 20b, 20c, 20a ', 20b', 20c ': spray nozzle
21a, 21b, 21c, 21a ', 21b', 21c ': nozzle tip
22a, 22b, 22c, 22a ', 22b', 22c ': induction coil part
30: molten resin injection machine 40: manifold
41: manifold runner 42: heating device
50, 50 ': sprue
51a, 51b, 51c, 51a ', 51b', 51c ': inlet block runner
60a, 60b, 60c, 60a ', 60b', 60c ': injection nozzle runner
70a, 70b, 70c, 70a ', 70b', 70c ': first direct contact heating means
71a, 71b, 71c, 71a ', 71b', 71c ': second direct contact heating means
80: high frequency power supply unit 90: integrated controller
The present invention relates to a multi-point gate non-contact high frequency induction molten resin injection apparatus, and more particularly, a plurality of injection having a variety of sizes and lengths in a mold for manufacturing one small product, such as gears and small electronic products By applying an injection nozzle group consisting of nozzles, it is possible to meet the change in the amount or injection position of the molten resin injected according to the shape or structure of the product, as well as the non-contact high frequency formed on the tip side of the plurality of injection nozzles. The present invention relates to a non-contact high frequency induction molten resin injection apparatus of a multi-point gate system capable of integrating a common induction coil unit as a heating means.
In general, an injection mold for injection molding small products such as small electronic products or gears is composed of a movable side and a fixed side, and the movable side and the fixed side are configured to mold a product while mutually engaging and parting. The hot molten resin raw material for forming the product in the state where the side and the fixed side parts are joined to each other is run between the runner and the fixed core along the runner, and the supplied molten resin is molded into the product between the cores. In order to complete the product, the structure of the runner is a very important passage when molding the product in the injection mold.
On the other hand, according to the configuration of the manifold for supplying molten resin to the spray nozzle for opening and closing the gate of the conventional runner, a plurality of spray nozzles having runners are provided on the mold plate, and one of them is a runner for supplying molten resin to each of them. And install a manifold having a supply of the molten resin to the spray nozzle through the manifold.
In the conventional manifold structure having the above configuration, the rod heater or the buried type is disposed at a predetermined position of the manifold so that the molten resin material passing through the runner of the manifold for supplying the molten resin material can be smoothly supplied. The heating device of the direct contact type such as the cartridge heater and the like and the spray nozzle part are separately provided with the heating device such as the band heater.
However, the heating method by direct heating has a large amount of heat loss and the heating state is different according to the adhesion state, and it takes a relatively long time, and local heating is impossible. There was a problem in that it was not suitable for the heating of the divided area.
In addition, in the case of injection molding small products such as small electronic products and gears, in order to mold a single product, a plurality of injection nozzles having a multi-point gate method having various sizes and lengths are required. This multipoint gate method has not been proposed at all.
In addition, in the case of a multi-point gate method in which a plurality of spray nozzles are required in forming a single product, it is necessary to collectively control the heating devices of the respective spray nozzles. In the related art, each of these heating devices is integrated in one controller. There is no technology to control and share.
Accordingly, an object of the present invention has been made in view of the above problems, the injection nozzle consisting of a plurality of injection nozzles having various sizes and lengths in a mold for manufacturing one small product such as gears and small electronic products. By applying the group, it is to provide a non-contact high-frequency induction molten resin injection apparatus of a multi-point gate method that can be adapted to the change in the amount or injection position of the molten resin injected in accordance with the shape or structure of the product.
Another object of the present invention is to form an induction coil portion as a non-contact high frequency induction heating apparatus only on the outer periphery of the nozzle tip side of each injection nozzle, which is relatively far from the molten resin injector, where a large relative temperature drop occurs. The present invention provides a multi-point gate non-contact high frequency induction molten resin injection apparatus that can be commonly used for each induction coil unit by electrically connecting to an integrated control unit for controlling the coil unit integrally, thereby securing both technical and economical efficiency.
A multi-point gate high frequency induction molten resin injection apparatus according to the present invention for achieving the above object, in the molten resin injection machine for supplying molten resin to the injection molding die, is mounted on one end of the molten resin injection machine to inject molten resin A spray nozzle group having a plurality of spray nozzles having different lengths and runner sizes for injecting molten resin into a mold for injecting a molded product and mounted on a lower side of the inlet block. Characterized in that made.
Here, one end of the molten resin injection machine and the inlet block is preferably connected by the runner of the manifold.
In addition, it is preferable that a plurality of inlet blocks are connected to the runner of the manifold.
In addition, the first direct contact heating means for heating the front end of each injection nozzle, an induction coil portion surrounding the outer edge of the rear end of each injection nozzle having a nozzle tip, and the induction coil portion high frequency power It is preferable to further include a high frequency power supply for supplying a rapid heating of the runner region of the nozzle tip side of each injection nozzle by the electromagnetic force of the induction coil.
In addition, a second direct contact heating means for heating the central portion of each injection nozzle may be further provided.
In addition, the first and second contact heating means may be a band heater or a hot wire heater.
In addition, a temperature sensor line for sensing the temperature of the runner region of the nozzle tip side of each injection nozzle may be wound together with the induction coil unit.
In addition, it is preferable that a separate integrated controller is electrically connected to the induction coil units of the respective injection nozzles so that the rapid heating of each induction coil unit is automatically integrated.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.
Here, the multi-point gate method according to the present invention is to apply a plurality of injection nozzles having various sizes or lengths to a mold for manufacturing one product such as a gear or a small electronic product. This is a method of implementing a plurality of nozzle gates for injecting molten resin into a product.
The non-contact high frequency induction according to the present invention is more energy efficient and precise management of the operation compared to the conventional equipment using fossil fuels such as coal and petroleum, so that it is possible to produce a homogeneous high-quality product and does not cause pollution. Due to its advantages, it is widely used in various industries. The principle of the high frequency induction is to generate a high frequency magnetic field by flowing a high frequency current through a donut-shaped coil using an electromagnetic induction action, so that the induced current flows in the heating material in the high frequency magnetic field. This induced current generates losses caused by eddy currents swirling in the object and Joule heat due to hysteresis loss and generates heat in a very short time. The heating using the heat generated in this way is called induction heating, and the use of high frequency current is called high frequency induction heating. Due to the use of high frequency high frequency currents, magnetic flux and eddy currents are concentrated on the surface layer of the heating object due to the skin action and proximity effect of the current, and the heat loss (eddy current loss, hysteresis loss) generated at this time heats the surface layer of the heating object. . With this principle, since the energy can be concentrated rapidly on the required portion of the object to be heated, efficient and rapid heating is possible, which brings about high productivity and high workability.
1 is a combined state diagram of a non-contact high frequency induction molten resin injection apparatus of a multi-point gate method according to the present invention, Figure 2 is an enlarged cross-sectional view of the injection nozzle of the multi-point gate method of Figure 1, Figure 3 is a multi-point gate method according to the present invention As a control block diagram of the injection nozzle will be described together for convenience.
As shown, the non-contact high-frequency induction molten
In the injection molding die 10, a core plate (not shown) is positioned on a substantially flat base (not shown), and cavity plates (not shown) are mutually engaged on the core plate for manufacturing the appearance of the injection molded product. It is supposed to be. Here, the
The
A spray nozzle group consisting of a plurality of spray nozzles 20 (20a, 20b, 20c) mounted at a lower side of the
Each of the spray nozzles 20 (20a, 20b, 20c) of the
Here, the illustrated example shows that the number of injection nozzles is three, but two or four or more may be possible depending on the shape or structure of the product to be molded. That is, the number of injection nozzles formed in the
In addition, the
Meanwhile, as shown in FIG. 2, first and second direct contact heating means 70a, 70b, 70c and 71a are provided at the front and center portions of the
In addition, as illustrated in FIG. 3, a high frequency
On the other hand, since the temperature difference of the molten resin injected into the front end and the center of each of the
Although not shown, the temperature for sensing the temperature of the
Therefore, each
In this manner, the
Here, the rapid heating by the
The
In addition, although not shown, a spiral groove or a projection may be formed on the outer periphery of the nozzle tip side of each injection nozzle to wind the induction coil portion along the spiral groove or projection.
4 is a state diagram of the combined state of the non-contact high-frequency induction molten resin injection apparatus of the multi-point gate method according to another embodiment of the present invention.
In the non-contact high frequency induction molten
As shown in FIG. 4, a multi-point gate type non-contact high frequency induction molten
The manifold 40 is a high temperature molten resin from the molten
On the other hand, such a direct thermal heating structure may be a general rod heater or a cartridge heater and the like, but the present invention does not limit the heating structure.
On the other hand, each
The
In addition, the inlet blocks 50 and 50 'and the
Therefore, the non-contact high frequency induction molten
According to the non-contact high-frequency induction molten resin injection apparatus of the multi-point gate method according to the present invention configured as described above, a plurality of injections having various sizes or lengths in a mold for manufacturing one small product, such as gears and small electronic products By applying the spray nozzle group consisting of the nozzles, there is an effect that can be adapted to the change in the amount or the injection position of the molten resin injected in accordance with the shape or structure of the product.
Further, the induction coil portion as a non-contact high frequency induction heating apparatus is formed only on the outer circumference of the nozzle tip side of each injection nozzle, which is relatively far from the molten resin injector, where a large relative temperature drop occurs, and the induction coil portions are integrated. By electrically connecting to the integrated control unit to control the control of each induction coil unit is possible to share the technical and economical effect can be secured together.
Although the present invention has been described in detail with reference to preferred embodiments according to the present invention, this is only for illustrating the present invention and is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention. It should be noted that this is possible as well as this is also within the scope of the present invention.
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020070061682A KR20080112788A (en) | 2007-06-22 | 2007-06-22 | Non-contact high-frequency induction resin injection apparatus for plastic mold |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070061682A KR20080112788A (en) | 2007-06-22 | 2007-06-22 | Non-contact high-frequency induction resin injection apparatus for plastic mold |
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Publication Number | Publication Date |
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KR20080112788A true KR20080112788A (en) | 2008-12-26 |
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Family Applications (1)
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KR1020070061682A KR20080112788A (en) | 2007-06-22 | 2007-06-22 | Non-contact high-frequency induction resin injection apparatus for plastic mold |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101228446B1 (en) * | 2010-04-30 | 2013-01-31 | 손유진 | Resin injection apparatus for plastic mold |
CN109016108A (en) * | 2018-09-11 | 2018-12-18 | 长兴鑫鼎耐火材料厂(普通合伙) | A kind of refractory tube production mold grouting device |
-
2007
- 2007-06-22 KR KR1020070061682A patent/KR20080112788A/en not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101228446B1 (en) * | 2010-04-30 | 2013-01-31 | 손유진 | Resin injection apparatus for plastic mold |
CN109016108A (en) * | 2018-09-11 | 2018-12-18 | 长兴鑫鼎耐火材料厂(普通合伙) | A kind of refractory tube production mold grouting device |
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