KR20150029070A - a method of injection molding - Google Patents
a method of injection molding Download PDFInfo
- Publication number
- KR20150029070A KR20150029070A KR20130107705A KR20130107705A KR20150029070A KR 20150029070 A KR20150029070 A KR 20150029070A KR 20130107705 A KR20130107705 A KR 20130107705A KR 20130107705 A KR20130107705 A KR 20130107705A KR 20150029070 A KR20150029070 A KR 20150029070A
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- metal plate
- injection
- mold
- supplying
- lower mold
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- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention relates to an injection molding method including a metal plate material and includes a metal plate material supply step of supplying a metal plate material to an injection mold and an injection resin supply step of supplying an injection resin to an upper surface of the metal plate material, And the shape of the metal plate is formed by using the supply pressure and the heat of the injection resin.
Description
The present invention relates to an injection molding method of an injection molded article including a metal plate, an injection mold and an injection molded article, and more particularly, to an injection molding method for injection molding a metal plate And more particularly, to an injection molding method of an injection molded article and an injection molded article.
Injection molding refers to a method in which a liquid plastic material is injected into a mold and solidified or cured to form a molded product.
In the case of a general injection molded product, it is basically made of plastic only. In case of making a high-grade interior and exterior product having a metal surface, a metal plate whose shape is preliminarily processed is placed on an injection mold, Thereby completing an injection product containing the metal plate.
It is essential that the shape of the metal plate be processed in advance in the molding method of the conventional injection molding including the metal plate. Hereinafter, this will be described in more detail with reference to FIG. 1 and FIG.
1 and 2 illustrate a press process for line-machining a shape of a metal plate. FIG. 2 is a cross-sectional view of the metal plate, This corresponds to the injection process for supplying the injection resin.
In the case of a conventional injection molding method involving a metal plate material, a pressing process as shown in Fig. 1 is indispensably required to process the metal plate into a desired shape prior to the injection process corresponding to Fig. As shown in FIG. 1, the pressing process for processing a metal plate includes steps (a) draw, (b) trim, (c) frange, (d) piecing, There is a problem that a lot of manufacturing time and cost are incurred prior to the injection process.
In addition, since a relatively thick metal plate having a thickness of about 0.4 mm or more is used in order to maintain the shape of the processed metal plate so as not to damage the shape of the processed metal plate in the process after the injection, it is not preferable from the viewpoint of manufacturing cost reduction.
It is an object of the present invention to provide an injection molding method, an injection mold, and an injection mold for injection molding including a metal plate which greatly simplifies the manufacturing process and reduces manufacturing time and manufacturing cost. And more particularly, to an injection molding method of an injection molding material including a metal plate material which can omit a pressing process of preforming a metal plate material which requires a lot of time and cost, an injection mold, and an injection molding.
According to another aspect of the present invention, there is provided an injection molding method comprising the steps of: supplying a metal plate to an injection mold; supplying an injection resin to an upper surface of the metal plate; Wherein the shape of the metal plate is formed by supplying the injection resin while using the supply pressure and the heat of the injection resin.
Also, the injection mold is composed of an upper mold and a lower mold. In the supplying step, the metal plate is supplied between the upper mold and the lower mold. In the supplying step, the injection resin is supplied to the upper mold And the metal plate material is formed to correspond to the inner shape of the lower mold by the supply pressure and heat of the injection resin.
And a mold coalescing step between the metal sheet supply step and the supply step wherein the upper mold and the lower mold are mated with an inner space corresponding to the shape of the final molded article, The resin is supplied from the upper mold and is bent into the inner shape of the lower mold and supplied to the inner space. The inner space can be regarded as a mold for providing the shape of the final molded article.
The metal mold joining step may include cutting the metal plate to a required size by a combination of edges of the upper mold and the lower mold.
The method may further include a metal sheet cutting step of cutting an outer line of the metal sheet using cutting means disposed along a side surface of the lower mold after the feeding step.
The method further includes a step of adhering the upper mold and the lower mold at a predetermined interval to increase the supply pressure at the same time as or after the supplying step.
The upper metal mold and / or the lower metal mold may include a concavo-convex structure of a concave-convex and / or concave-convex structure for forming concave-convex structures of embossing and / or engraving on the surface of the metal plate material.
Wherein the injection mold further includes a hole forming portion for forming a hole in the final injection mold, wherein the hole forming portion includes a protrusion provided in the lower mold and a depression provided in the upper mold, And the metal sheet material corresponding to the hole forming portion is cut while being mated with each other in the metal mold mating step.
Wherein the injection mold further comprises a hole forming part for forming a hole in the final injection molding, wherein the hole forming part includes a depression provided in the lower mold and a protrusion provided in the upper mold, And the metal plate material corresponding to the hole forming portion is cut while being mutually mingled in the metal forming step.
A method for producing an injection molded product comprising a metal plate having a thickness of 0.1 mm or more and 0.3 mm or less, comprising the steps of: supplying a metal plate to the injection mold; supplying the injection resin to the upper surface of the metal plate Wherein the shape of the metal plate is formed by supplying the injection resin and using the injection pressure and the heat of the injection resin.
According to another aspect of the present invention, there is provided an injection mold for injecting injection resin into a metal plate, the injection mold comprising an upper mold and a lower mold, And the shape of the metal plate is formed by using the supply pressure and the heat of the injection resin while supplying the injection resin.
The upper mold includes at least one injection resin supply unit for supplying the injection resin, and the lower mold and the upper mold are provided with a mold for final injection molding in a state of mutual mixing, An injection molded article is produced by using the supply pressure and the heat of the injection resin to shape the metal plate so as to correspond to the shape of the mold.
The upper mold may further include cutting means for cutting the metal plate by mating with the lower fitting surface of the lower mold.
Here, the cutting means may include an extending portion extending laterally by a lateral thickness of the molded product, and an upper fitting surface bent upward from the extended portion, the upper extending portion extending from the rear mold portion providing the rear shape of the molded product in the upper mold And the metal fitting is cut while the upper fitting surface and the lower fitting surface are engaged with each other so as to be slid with respect to each other.
And a cutting unit provided on a side surface of the lower mold to cut off an unnecessary portion of the metal plate.
Further, the upper mold and the lower mold are further closely contacted with each other after supplying the injection resin or after supplying the injection resin, thereby increasing the supply pressure.
The injection mold may further include a hole forming part for forming a hole in the injection product, wherein the hole forming part includes a protrusion provided on the lower mold and a depression provided on the upper mold, And the metal plate corresponding to a portion forming the hole is cut while being mated with each other according to the coalescence of the upper mold and the lower mold.
The injection mold further includes a hole forming part for forming a hole in the injection product, wherein the hole forming part includes a depression provided in the lower mold and a protrusion provided in the upper mold, And the depressed portion and the protruding portion are mutually engaged according to the coalescence of the upper mold and the lower mold to cut the metal plate corresponding to the hole forming portion.
The upper metal mold and / or the lower metal mold may include a concavo-convex structure of a concave-convex and / or concave-convex structure for forming concave-convex structures of embossing and / or engraving on the surface of the metal plate material.
According to another aspect of the present invention, there is provided an injection molded article for automobile interior and exterior materials, comprising: a metal plate having a thickness of 0.1 mm or more and 0.3 mm or less; Wherein the metal plate material is shaped by a supply pressure and heat of an injection resin forming the injection plastic part.
And, the metal plate material shaped by the supply pressure and heat includes at least one corner, and the corner has a bending radius of 1 mm or more.
On the other hand, the corners preferably have a bending radius of 1 mm or more and 2.5 mm or less.
Also, the metal plate material shaped by the supply pressure and the heat includes at least one vertex, wherein the vertex has a bending radius of 1 mm or more.
On the other hand, it is preferable that the vertex has a bending radius of 1 mm or more and 3.5 mm or less.
The metal plate material is made of SUS or aluminum foil, and the metal plate material includes an adhesive layer on a surface in contact with the injection plastic part.
On the other hand, when the foil is made of an aluminum-based foil, the foil may include an adhesive layer, a primer layer, an aluminum layer, a primer layer, and a coating layer sequentially from the surface in contact with the injection plastic portion.
In the case of injection molding, it is generally the production of specific parts used in the finished product, and the simplification of the manufacturing process and the reduction of the manufacturing cost will bring about a great advantage in terms of technology and management even if a slight reduction is made.
The injection molding method, the injection mold and the injection mold according to the present invention can omit the pre-pressing process, thereby greatly reducing the manufacturing process and the time required for the injection molding, and consequently, can greatly reduce manufacturing cost and cost It is effective.
Further, since the cutting and hole forming process and the concavity and convexity forming process can be simultaneously performed in the injection step, the conventional injection process can be substituted for the conventional complicated process, not simply omitting the pressing process. Also, since the metal plate can be replaced with a very thin one, it can contribute to the reduction of manufacturing cost.
1 is a flow chart showing a press process for machining a metal plate in an injection method of an injection molded article including a conventional metal plate.
FIG. 2 is a process diagram showing an injection process for completing an injection molding by supplying injection resin to one side of a metal plate in the injection method of injection molding including a conventional metal plate.
FIG. 3 is a conceptual diagram illustrating an injection process of an injection product including a metal plate according to an embodiment of the present invention.
FIG. 4 is a detailed process diagram illustrating the correspondence relationship between the upper mold, the lower mold, and the metal plate in the injection process of the injection molded article including the metal plate according to the embodiment of the present invention.
FIG. 5 is a detailed process diagram illustrating the correspondence relationship between the upper mold, the lower mold, and the metal plate in the injection process of the injection product including the metal plate according to another embodiment of the present invention.
Fig. 6 corresponds to an enlarged view showing in more detail the cutting process in Figs. 4 (a) and 4 (b).
Fig. 7 corresponds to an enlarged view showing in more detail the cutting process in Figs. 5 (a) and 5 (b).
Fig. 8 corresponds to an enlarged view showing in more detail the portion A in Fig. 6 and Fig.
Fig. 9 corresponds to a detailed view showing part A of Fig. 6 as another embodiment.
Fig. 10 corresponds to a detailed view showing part A of Fig. 7 as another embodiment.
Fig. 11 corresponds to an enlarged view showing in more detail the portion B in Fig.
Fig. 12 corresponds to an enlarged view showing part B of Fig. 7 as another embodiment.
FIG. 13 is a cross-sectional view illustrating an injection mold including a metal plate having holes according to an embodiment of the present invention.
14 is a perspective view and a sectional enlarged view of a metal plate according to an embodiment of the present invention.
FIG. 15 is an enlarged view showing corners and vertices of an injection molded article including a metal plate according to an embodiment of the present invention.
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
The injection method of the injection molding material including the metal plate according to the present invention does not include a separate press process as shown in FIG. 1, and simultaneously shapes the metal plate in the injection process, thereby greatly reducing the manufacturing time and cost .
FIG. 3 is a process diagram illustrating the concept of an injection molding method of an injection molded article including a metal plate according to an embodiment of the present invention.
3, an injection molding method according to an embodiment of the present invention is a method of placing an
More specifically, first, the
The
FIGS. 4 and 5 correspond to a process diagram illustrating the injection molding method according to an embodiment of the present invention including the cutting process of the
4 and 5A show the step of supplying the
FIGS. 4 and 5 (b) illustrate a metal mold joining step and a
4 and 5 (b), the
At the same time, the
More specifically, as shown in FIG. 6, the outer line of the
8, the
As shown in FIGS. 9 and 10, the cutter may be provided with a
9 and 10, the cutting
4 and 5 (b) show the hole forming process, which will be described in more detail with reference to FIGS. 7, 8, 11, and 12. FIG.
7, 8, 11, and 12, in the metal forming step, a
As shown in FIGS. 7 and 11, the
7 and 11, the
The
4 and 5C illustrate an injection resin supply step in which the
4 and 5 (d), the
14 is a perspective view and an enlarged cross-sectional view showing a
In the
On the other hand, in the case of aluminum foil, as shown in FIG. 14, the aluminum foil is sequentially formed from the surface of the
Meanwhile, the final molded
On the other hand, the
15, since the
The bending radius of the
This is considered to be the most preferable curvature in consideration of the thickness of 0.1 mm or more and 0.3 mm or less of the
Unless defined otherwise, all terms used herein, including technical or scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In addition, terms used in the present invention should not be construed as ideal or overly formal in the sense of the present invention unless explicitly defined.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.
10, 10 ': metal plate material
11: Adhesive layer
12, 14: Primer layer
13: Aluminum layer
15: Coating layer
16: Hole round section
20: Upper mold
20 ': Fixed frame
21: Upper coalescing surface
22: Extension
23, 23 ': protrusions
24:
25: injection resin supply part
30: Lower mold
31: Lower cohesive face
32, 32 ': Depression
33: Depressed surface
40: injection resin
40 ': injection plastic part
50: Injection
51: hole
61: Corner
62: Vertex point
71, 72:
71: blade portion
72: Linear actuator
Claims (11)
And an injection resin supplying step of supplying an injection resin to an upper surface of the metal plate,
Wherein the shape of the metal plate is formed by supplying the injection resin while using the supply pressure and the heat of the injection resin.
Wherein the injection mold comprises an upper mold and a lower mold,
In the metal plate material supply step, the metal plate material is supplied between the upper mold and the lower mold,
In the supplying step, the injection resin is supplied through at least one injection resin supply unit provided in the upper mold,
Wherein the metal plate material is formed to correspond to an inner shape of the lower mold by a supply pressure and heat of the injection resin.
Between the metal sheet material supply step and the supply step,
Wherein the upper mold and the lower mold are mated with an inner space corresponding to a shape of the final molded product,
Wherein the injection resin is supplied from the upper mold to bend the metal plate along the inner shape of the lower mold and is supplied to the inner space in the supplying step.
Wherein the mold-
And cutting the metal plate to a desired size by the combination of the edges of the upper mold and the lower mold.
After the supplying step,
And cutting the metal plate by using a cutting means disposed along the side surface of the lower metal plate to cut an outer line of the metal plate.
Simultaneously with or after the feeding step,
The method of claim 1, further comprising the step of bringing the upper mold and the lower mold into close contact with each other to increase the supply pressure.
Wherein the upper metal mold and / or the lower metal mold includes a concavo-convex structure of a concave-convex and / or concave-convex structure for forming concave-convex structures of a concave and / or concave shape on the surface of the metal plate material. Molding method.
Wherein the injection mold further includes a hole forming part for forming a hole in the final injection product,
Wherein the hole forming portion includes a protrusion provided on the lower mold and a depression provided on the upper mold,
Wherein the depressions and protrusions are mutually welded in the metal fitting step, and the metal plate corresponding to the holes is cut.
Wherein the metal plate material comprises:
Wherein a portion of the periphery of the cut hole is at least partially bent and extended to the side of the protrusion to form a hole round portion leading to a side surface of the hole in the final injection product.
Wherein the injection mold further includes a hole forming part for forming a hole in the final injection product,
Wherein the hole forming portion includes a depression provided in the lower mold and a protrusion provided in the upper mold,
Wherein the depressions and protrusions are mutually welded in the metal fitting step, and the metal plate corresponding to the holes is cut.
A metal plate material supplying step of supplying the metal plate material to an injection mold;
And a supplying step of supplying an injection resin to an upper surface of the metal plate,
Wherein the shape of the metal plate is formed by supplying the injection resin while using the supply pressure and the heat of the injection resin.
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KR1020130107705A KR101514632B1 (en) | 2013-09-09 | 2013-09-09 | a method of injection molding |
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KR1020130107705A KR101514632B1 (en) | 2013-09-09 | 2013-09-09 | a method of injection molding |
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KR20150029070A true KR20150029070A (en) | 2015-03-18 |
KR101514632B1 KR101514632B1 (en) | 2015-04-23 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20170001592U (en) * | 2015-10-28 | 2017-05-10 | 박지훈 | Injection mold for keratin remover wherein protrusion of cutter and bending for bended part are integrally possible |
Family Cites Families (2)
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KR100231075B1 (en) * | 1991-07-23 | 1999-12-01 | 로렌스 제이. 로어즈 | Method of die forming metallic sheet materials |
JP2714258B2 (en) * | 1993-12-28 | 1998-02-16 | 日本写真印刷株式会社 | Picture-formed article manufacturing equipment and picture-formed article manufacturing method |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20170001592U (en) * | 2015-10-28 | 2017-05-10 | 박지훈 | Injection mold for keratin remover wherein protrusion of cutter and bending for bended part are integrally possible |
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