CN109986047B - Die casting device - Google Patents
Die casting device Download PDFInfo
- Publication number
- CN109986047B CN109986047B CN201810002294.XA CN201810002294A CN109986047B CN 109986047 B CN109986047 B CN 109986047B CN 201810002294 A CN201810002294 A CN 201810002294A CN 109986047 B CN109986047 B CN 109986047B
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- CN
- China
- Prior art keywords
- mold
- runner
- die
- casting device
- slide core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004512 die casting Methods 0.000 title claims abstract description 38
- 238000000465 moulding Methods 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 3
- 239000002184 metal Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2272—Sprue channels
-
- 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
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention provides a die casting device which can prevent a runner from bending when a die is opened by a simple structure so as to prevent a formed product from deforming. The die casting device is provided with: a stationary mold (20) having a plurality of cavities (21); a movable mold (30) having a plurality of cavities (31); and a slide mold (40) which is disposed between the fixed mold (20) and the movable mold (30) and moves in a direction orthogonal to the mold opening/closing direction. A movable mold (30) is provided with a lateral runner groove (32) connected to the plurality of cavities (21, 31), and a sliding mold (40) is provided with an insert core (41) that advances and retracts relative to the plurality of cavities (21, 31), and a central sliding core (42) that is positioned between the fixed mold (20) and the lateral runner groove (32) and covers the lateral runner groove (32) when the mold is closed. The center slide core (42) is positioned on a runner (Rc, Rs) formed in the runner groove (32) when the mold is opened.
Description
Technical Field
The present invention relates to a die casting device, and more particularly, to a die casting device for molding a slider body of a slider for a slide fastener.
Background
As a conventional die casting device, the following devices are known: the runner housing is divided into two parts, a nozzle contact portion fixed to the fixed mold and a runner portion provided movably with respect to the fixed mold through a gap formed between the runner housing and the fixed mold, and a coil spring is disposed between the nozzle contact portion and the runner portion (see, for example, patent document 1). In this die casting device, the nozzle contact portion and the runner side portion can be reliably separated by the biasing force of the coil spring at the time of mold opening, and the sprue can be reliably released from the fixed mold without temporarily generating a large release resistance.
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 2815919
Disclosure of Invention
However, the die-casting device described in patent document 1 has a complicated structure, and therefore, has high manufacturing cost and low maintainability. Further, since a space for providing the nozzle contact portion, the runner portion, and the coil spring is required, the thickness of the stationary mold is increased, and the apparatus becomes large.
Further, in the case where the sprue bush is not divided into two parts, i.e., the nozzle contact-side part and the runner-side part, when the mold is opened, a large mold release resistance is generated between the fixed mold and the sprue, and the sprue is pulled toward the fixed mold and the runner is bent, thereby deforming the molded product.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a die casting device capable of preventing a runner from being bent at the time of opening a mold and preventing a molded article from being deformed with a simple configuration.
The above object of the present invention is achieved by the following structure.
(1) A die casting device is provided with: a stationary mold having a plurality of cavities; a movable mold having a plurality of cavities; and a slide mold disposed between the fixed mold and the movable mold and moving in a direction orthogonal to a mold opening and closing direction, the die casting device being characterized in that the movable mold is formed with transverse runner grooves connected to the plurality of cavities, the slide mold being provided with: an insert core which advances and retreats with respect to the plurality of cavities; and a central slide core which is positioned between the fixed mold and the runner groove and covers the runner groove when the mold is closed, and the central slide core is positioned on the runner formed in the runner groove when the mold is opened.
(2) The die casting apparatus according to (1), wherein a guide groove for guiding the movement of the central slide core is formed in the movable mold, and a protrusion fitted into the guide groove is formed in the central slide core.
(3) The die casting device according to (1) or (2), wherein a sprue hole into which a melt injected from an injection molding machine is injected is formed in the stationary mold, a molded product molded by the die casting device has a sprue formed by the sprue hole, and the central slide core is disposed around the sprue.
Effects of the invention
According to the present invention, since the movable mold is provided with the runner groove connected to the plurality of cavities, the slide mold is provided with the insert core which advances and retreats with respect to the plurality of cavities, and the central slide core which is positioned between the fixed mold and the runner groove and covers the runner groove when the mold is closed, and the central slide core is positioned on the runner formed in the runner groove when the mold is opened, the runner is caught by the central slide core when the mold is opened, and the runner can be pulled to the vicinity of the movable mold. Therefore, the bending of the runner during mold opening can be prevented with a simple structure, and the deformation of the molded product can be prevented.
Drawings
Fig. 1 is a longitudinal sectional view illustrating an embodiment of a die casting device according to the present invention.
FIG. 2 is a top view of the cavity side of the stationary mold shown in FIG. 1.
FIG. 3 is a top view of the cavity side of the movable mold shown in FIG. 1.
Fig. 4 is a sectional view taken along line a-a of fig. 1 in a state where the mold is fully opened.
Fig. 5 is a sectional view taken along line B-B of fig. 3.
Fig. 6 is a cross-sectional view corresponding to fig. 4 for explaining a mold clamping state.
FIG. 7 is a cut-away perspective view of the sprue periphery in a clamped condition.
Fig. 8 is a sectional view corresponding to fig. 4 illustrating a state in which the runner is caught by the central slide core when the mold is opened.
FIG. 9 is a cut-away perspective view of the sprue periphery when the mold is open.
Fig. 10 is a perspective view illustrating a molded object molded according to an embodiment of the die-casting device of the present invention.
Fig. 11 is a partially enlarged perspective view of a movable die of the old die casting device.
Fig. 12 is a view of the periphery of a sprue of a molded product illustrating the flow of molten metal in the die casting device of fig. 11.
Fig. 13 is a perspective view illustrating the melting loss of the insert core in the die casting device of fig. 11.
Fig. 14 is a plan view of a cavity side of a modification of the stationary mold.
Description of the reference numerals
10 die casting device
20 fixed mould
21 mould cavity
22 straight pouring gate hole
30 moving mould
31 mould cavity
32 horizontal runner groove
33 rectifying part
34 guide groove
40 sliding die
41 insert core
41a cavity
42 center slide core
42a recess
42b protruding strip
D shaped article
Rc central horizontal pouring channel
Rs side cross gate
SP sprue
SD molded article
P pressed part
ST step part
Detailed Description
Hereinafter, an embodiment of the die casting device according to the present invention will be specifically described with reference to the drawings. In the following description, the upper side is referred to as the upper side with respect to the paper surface of fig. 1, the lower side is referred to as the lower side with respect to the paper surface of fig. 1, the left side is referred to as the left side with respect to the paper surface of fig. 1, the right side is referred to as the right side with respect to the paper surface of fig. 1, the front side is referred to as the front side with respect to the paper surface of fig. 1, and the rear side is referred to as the back side with respect to.
As shown in fig. 1 to 4, the die casting device 10 of the present embodiment includes: a fixed mold 20 having a plurality of cavities 21 on a lower surface; a movable mold 30 disposed below the fixed mold 20 and having a plurality of cavities 31 on an upper surface thereof; and a pair of front and rear slide molds 40 disposed between the fixed mold 20 and the movable mold 30 and movable in a direction (front-rear direction) orthogonal to the mold opening/closing direction (vertical direction). The plurality of cavities 21 and 31 of the present embodiment are 8 on the left and right, respectively, and 16 in total. The movable mold 30 is configured to be driven in the vertical direction.
As shown in fig. 1 and 2, a straight runner hole 22 into which molten metal injected from an injection molding machine, not shown, is injected is formed in the center of the fixed mold 20 in the left-right direction and the front-rear direction.
As shown in fig. 1 and 3, a runner groove 32 connected to the plurality of cavities 31 of the movable mold 30 is formed along the left-right direction at the center in the front-rear direction of the upper surface of the movable mold 30. The sprue hole 22 of the fixed mold 20 is disposed so as to be positioned at the center in the left-right direction of the runner groove 32. Further, a rectifying portion 33 having a substantially conical tip end for rectifying the flow of the molten metal poured into the sprue hole 22 is provided at the center in the left-right direction of the runner groove 32.
As shown in fig. 3, the slide die 40 includes a pair of right and left insert cores (insert cores) 41 that advance and retreat with respect to the plurality of cavities 21, 31, and a center slide core (center slide core)42 that is disposed between the right and left insert cores 41. The left and right insert cores 41 and the center slide core 42 are configured to be driven in the front-rear direction in a similar manner in accordance with the vertical movement of the movable mold 30.
Further, a cavity 41a is formed at the tip of the right and left insert cores 41. Further, a substantially U-shaped recess 42a is formed at the tip of the center slide core 42 so as to avoid the tip of the rectifying portion 33.
As shown in fig. 3 and 5, a pair of front and rear guide grooves 34 for guiding the movement of the front and rear central slide cores 42 are formed in the upper surface of the left and right central portion of the movable mold 30. A projection 42b that fits into the guide groove 34 is formed on the lower surface of the center slide core 42.
Here, a molded article D molded by the die casting device 10 of the present embodiment will be described. As shown in fig. 10, the molded article D has: a sprue SP formed through the sprue hole 22 of the stationary mold 20; a center runner Rc formed through the runner groove 32 of the movable mold 30 and extending in the front-rear direction below the sprue SP; side gates Rs formed by the gate grooves 32 of the movable mold 30 and extending in the left-right direction from the center in the front-rear direction of the center gate Rc; a plurality of molded articles SD connected to the left and right side gates Rs, respectively; and pressed portions P formed at the tip end portions of the left and right side gates Rs, respectively, and pressed by ejector pins (eject pin)35 described later.
Further, a stepped portion ST formed by the recess 42a of the center slide core 42 is formed at the upper end portion of the center runner Rc, and as shown in fig. 8 and 9, the upper surface of the stepped portion ST becomes a portion caught by the lower edge of the recess 42a of the center slide core 42 at the time of mold opening. The step ST formed in the center runner Rc below the sprue SP by the recess 42a of the center slide core 42 means that the center slide core 42 is disposed around the sprue SP.
In the present embodiment, the front and rear center slide cores 42 are positioned between the fixed mold 20 and the runner groove 32 and at a position covering the upper side of the runner groove 32 during mold clamping (see fig. 6 and 7). The front and rear center slide cores 42 are positioned on the upper surface of the step ST of the center runner Rc and the upper surface of the base of the left and right side runners Rs formed in the runner groove 32 at the time of mold opening (see fig. 8 and 9). Therefore, when the mold is opened, the upper surface of the step ST of the center runner Rc and the upper surfaces of the bases of the left and right side runners Rs are caught by the front and rear center slide cores 42, so that the center runner Rc and the left and right side runners Rs are pulled to the vicinity of the movable mold 30.
As shown in fig. 1 and 3, the movable mold 30 is provided with four ejector pins 35 for releasing the molded article D after molding. The four knock-out pins 35 are configured to be movable vertically to push the molded article D upward, two knock-out pins 35 are disposed at positions for pressing both front and rear end portions of the center runner Rc, respectively, and the remaining two knock-out pins 35 are disposed at positions for pressing the pressed portions P of the left and right side runners Rs, respectively.
As described above, according to the die casting device 10 of the present embodiment, the front and rear center slide cores 42 are positioned between the fixed die 20 and the runner groove 32 and covering the upper side of the runner groove 32 during mold closing, and are positioned on the upper surface of the step ST of the center runner Rc formed in the runner groove 32 and the upper surfaces of the bases of the left and right side runners Rs during mold opening, so that the runners Rc, Rs are caught by the front and rear center slide cores 42 and can be pulled to the vicinity of the movable die during mold opening. Therefore, the bending of the runners Rc and Rs at the time of mold opening can be prevented with a simple configuration, and the deformation of the molded article SD can be prevented.
Next, a die casting device 50, which is an old die casting device of the die casting device 10 according to the present embodiment, will be described. In this die casting device 50, as shown in fig. 11, a fixed core (fixed core)51 is formed on the upper surface of the movable mold 30 without the front and rear center slide cores 42. In this case, as shown in fig. 12, the molten metal poured into the sprue hole collides with the step portion R1 of the runner R to form turbulence (see the arrow in fig. 12), and therefore the quality of the molded product SD is degraded. Further, since the high-temperature molten metal just injected collides with the side surfaces 41s (see fig. 13) of the left and right insert cores 41 forming the step portion R1 of the runner R, the side surfaces 41s are easily melted and damaged.
However, in the die casting device 10 of the present embodiment, since the central slide cores 42 are provided in the front and rear and the step portions R1 are removed, turbulence of the molten metal can be prevented and the quality of the molded product SD can be improved. Further, since the step portion R1 is removed, the high-temperature molten metal does not collide with the side surfaces 41s of the left and right insert cores 41, and therefore, the insert cores 41 can be prevented from being melted. Further, for example, even if the central slide core 42 is melted, only the central slide core 42 whose manufacturing cost is greatly reduced as compared with the insert core 41 needs to be replaced, so that the maintenance cost of the die casting device 10 can be greatly reduced.
In the die casting device 50 of the old type, as shown in fig. 11, since the left and right side surfaces 51s of the fixed core 51 of the movable mold 30 slide on the side surfaces 41s of the left and right insert cores 41, the left and right side surfaces 51s of the fixed core 51 and the side surfaces 41s of the left and right insert cores 41 are worn. However, in the die casting device 10 of the present embodiment, since the central slide core 42 is disposed without the fixed core 51, the side surfaces of the right and left insert cores 41 are not worn. Further, since the left and right insert cores 41 move together with the central slide core 42, the side surfaces thereof are not worn. Therefore, the wear of the right and left insert cores 41 and the center slide core 42 can be prevented, and the life can be prolonged.
Further, as a modification of the present embodiment, as shown in fig. 14, the horizontal runner groove 32 may be formed in the fixed mold 20. In this case, the runner groove 32 is not formed in the movable mold 30. Further, the runner groove 32 may also be formed in both the fixed mold 20 and the movable mold 30.
The present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from the scope of the present invention.
For example, in the present embodiment, a pair of slide dies is provided, but the present invention is not limited to this, and one slide die may be provided depending on the shape of the molded article.
In addition, although the molding is made of metal in the present embodiment, the present invention is not limited to this, and a synthetic resin molding may be formed.
Claims (3)
1. A die casting device (10) is provided with: a stationary mold (20) having a plurality of cavities (21); a movable mold (30) having a plurality of cavities (31); and a front and rear slide die (40) disposed between the fixed die (20) and the movable die (30) and moving in a direction orthogonal to the die opening/closing direction, the die casting device (10) being characterized in that,
a transverse runner groove (32) connected with the plurality of cavities (21, 31) is formed on the movable die (30),
the front and rear sliding dies (40) are respectively provided with: an insert core (41) that advances and retreats relative to the plurality of cavities (21, 31); and a central slide core (42) which is located between the fixed mold (20) and the lateral runner groove (32) and at a position covering the lateral runner groove (32) when the molds are closed,
the central slide core (42) is positioned on a central cross gate (Rc) and a side cross gate (Rs) formed in the cross gate groove (32) when the mold is opened,
a recess (42a) is formed at the tip of the center slide core (42),
the recess (42a) is configured to form a Step (ST) at the upper end of the central runner (Rc),
the center slide core (42) is positioned on an upper surface of the Step (ST) of the center runner (Rc) and an upper surface of a base of the side runner (Rs) when the mold is opened, and the upper surface of the Step (ST) of the center runner (Rc) and the upper surface of the base of the side runner (Rs) are caught by the center slide core (42).
2. The die-casting device (10) according to claim 1, characterized in that a guide groove (34) that guides the movement of the central slide core (42) is formed on the movable die (30),
a protruding strip (42b) that fits into the guide groove (34) is formed on the central slide core (42).
3. The die casting device (10) according to claim 1 or 2, characterized in that a straight runner hole (22) into which a melt injected from an injection molding machine is injected is formed on the stationary mold (20),
the molding object (D) molded by the die casting device (10) has a Sprue (SP) formed by the sprue hole (22),
the central slide core (42) is disposed around the Sprue (SP).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810002294.XA CN109986047B (en) | 2018-01-02 | 2018-01-02 | Die casting device |
| TW107146711A TWI696507B (en) | 2018-01-02 | 2018-12-24 | Die casting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810002294.XA CN109986047B (en) | 2018-01-02 | 2018-01-02 | Die casting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109986047A CN109986047A (en) | 2019-07-09 |
| CN109986047B true CN109986047B (en) | 2021-05-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810002294.XA Active CN109986047B (en) | 2018-01-02 | 2018-01-02 | Die casting device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109986047B (en) |
| TW (1) | TWI696507B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111585147A (en) * | 2020-06-16 | 2020-08-25 | 河南和实科技有限公司 | Composite metal friction disc and manufacturing method thereof and grounding device |
| CN114101625B (en) * | 2022-01-26 | 2022-05-27 | 浙江华朔科技股份有限公司 | Die-casting die for motor shell and production method of motor shell |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2129752A1 (en) * | 1971-06-16 | 1972-12-28 | Karl Hehl | Injection mold for a plastics processing injection molding machine for the production of two-tone injection-molded parts |
| CA1281168C (en) * | 1986-03-03 | 1991-03-12 | Toyoaki Ueno | Vertical die casting machine |
| JP2815919B2 (en) * | 1989-09-18 | 1998-10-27 | 三洋電機株式会社 | Injection mold |
| JP3104617B2 (en) | 1996-05-09 | 2000-10-30 | 日本電気株式会社 | Diversity receiving method and apparatus for high speed data transmission system in high speed mobile communication |
| DE19936584B4 (en) * | 1999-08-03 | 2007-09-27 | EWIKON Heißkanalsysteme GmbH & Co. KG | Electrically operated heating element |
| CN202656393U (en) * | 2012-05-10 | 2013-01-09 | 太仓戴尔塔精密模具有限公司 | Teflon cable tie mold |
| CN203171971U (en) * | 2013-04-16 | 2013-09-04 | 玉环圣久模具有限公司 | Runner structure with slide block mould |
| CN205362620U (en) * | 2016-03-11 | 2016-07-06 | 雅安泛华工装模具有限责任公司 | Die casting die of ware centimetre seat is divided to two merits of 4G signal convenient to divide mould |
| CN105903926B (en) * | 2016-06-30 | 2017-12-08 | 南安贤达机械有限公司 | A kind of aluminium alloy wheel hub die casting |
| CN205889756U (en) * | 2016-08-02 | 2017-01-18 | 慈溪市盛艺模具有限公司 | Multi -cavity high performance the gating system |
| CN106735057A (en) * | 2016-11-30 | 2017-05-31 | 徐鹏威 | A kind of die casting |
| CN206425523U (en) * | 2016-12-29 | 2017-08-22 | 无锡市灵通铸造有限公司 | A kind of casting die being easily stripped |
| CN206763883U (en) * | 2017-04-25 | 2017-12-19 | 深圳市银宝山新压铸科技有限公司 | A kind of die casting for being used to test bar-shaped casting thermal fragmentation tendency and mechanical property |
-
2018
- 2018-01-02 CN CN201810002294.XA patent/CN109986047B/en active Active
- 2018-12-24 TW TW107146711A patent/TWI696507B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| TW201929977A (en) | 2019-08-01 |
| CN109986047A (en) | 2019-07-09 |
| TWI696507B (en) | 2020-06-21 |
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