Die casting device

Abstract

The present invention relates to a die casting device capable of freely changing the position and number of sleeves into which molten metal is injected. The die casting device of the present invention comprises: a fixed die plate (100); a movable die plate (200) corresponding to the fixed die plate; a sleeve block (300) detachably coupled to the fixed die plate and formed with at least one sleeve (310); a support plate (400) having at least one sleeve rod (430) corresponding to the sleeve; and a driving unit (500) that causes the support plate to move back and forth with respect to the fixed die plate.

Description

die-casting device

[0001] The present invention relates to a die-casting device capable of freely changing the position and quantity of sleeves into which molten metal is injected.

[0002] Traditionally, the automotive parts manufacturing process uses die-casting devices to individually produce various components, such as engine blocks, transmission housings, and suspension parts. These individually produced parts are then assembled into final automotive parts using various methods, including mechanical assembly, welding, and bolting. Finally, the assembled parts are inspected and their quality verified to complete the final automotive parts.

[0003] In addition, the automotive industry is recently striving to reduce the number of parts while replacing the steel alloys primarily used in the past with lightweight metals as a method of lightweighting to improve fuel efficiency and reduce exhaust emissions. As part of this effort, they are developing a super-large die casting method that forms a monolithic aluminum alloy by applying high pressure using a super-large die casting machine.

[0004] This massive die-casting method, first introduced by the automobile manufacturer Tesla under the name "Giga Casting," refers to a process that uses a massive 6,000 to 9,000-ton die-casting machine to cast an integrated chassis or battery housing made of aluminum alloy in a single step, instead of assembling and welding small parts in detail.

[0005] Forming automotive parts as a single integrated unit in this way is considered suitable for electric vehicle production because, compared to the conventional manufacturing method of making a car body by drilling numerous holes in steel plates and assembling and welding them one by one, it offers faster production speeds, reduces assembly errors, and lowers overall production costs, as well as reducing body weight during the manufacturing process and providing structural strength and superior durability.

[0006] However, due to the large size of the parts to be cast in this ultra-large die casting method, it is difficult to penetrate the molten metal into every corner of the cavity using conventional die casting devices equipped with a single, fixed sleeve. Consequently, this leads to various defects such as porosity during the casting process, failure to fuse properly due to low molten metal temperature while filling the cavity, increased likelihood of thermal cracking or the inclusion of non-metallic inclusions during cooling, dimensional deformation, surface defects, and uneven cooling rates, thus requiring improvement.

[0007] The present invention was devised to solve the aforementioned problems and aims to provide a die-casting device capable of easily penetrating the molten metal injected into the cavity into every corner of the cavity.

[0008] To achieve the above objective, the die-casting device of the present invention comprises a fixed die plate, a movable die plate corresponding to the fixed die plate, a sleeve block detachably coupled to the fixed die plate and having at least one sleeve formed therein, a support plate having at least one sleeve rod corresponding to the sleeve, and a driving unit for reciprocating the support plate toward the fixed die plate.

[0009] In addition, the support plate may have a body portion coupled to the driving unit and a sleeve rod block detachably coupled to the body portion and having the sleeve rods fixed thereto.

[0010] Meanwhile, it is preferable that a plurality of guide bars be installed on the fixed die plate so as to be inserted horizontally through the edge of the support plate to guide the reciprocating movement of the support plate.

[0011] In this case, a through hole through which a guide bar passes is formed at the edge of the support plate, and a linear bushing can be mounted in the through hole.

[0012] The die casting device of the present invention configured as described above can freely change the position and quantity of sleeves according to the part to be cast using sleeve blocks, thereby making it easy to design a gating system based on a multi-biscuit that satisfies optimal casting conditions, allowing the molten metal injected into the cavity to penetrate very easily into every corner of the cavity, and as a result, has the effect of easily making it possible to cast an extra-large part formed as a single unit.

[0013] In addition, the present invention has the effect of enabling rapid and precise setting of sleeves and sleeve rods even if the position and quantity of sleeves vary depending on the part to be cast, because a sleeve block with a fixed sleeve is detachably installed on a fixed die plate and a sleeve rod block with a corresponding fixed sleeve rod is detachably installed on a support plate.

[0014] FIG. 1 is a front view of a die-casting device according to the present invention.

[0015] FIG. 2 is a cross-sectional view along line II-II of FIG. 1.

[0016] FIG. 3 is a cross-sectional view along line III-III of FIG. 2.

[0017] FIG. 4 is a cross-sectional view along line IV-IV of FIG. 1.

[0018] FIG. 5 is a cross-sectional view along the line V-V of FIG. 4.

[0019] The features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments based on the accompanying drawings.

[0020] Prior to this, terms and words used in this specification and claims must be interpreted in a meaning and concept consistent with the technical spirit of the invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0021] Furthermore, the terms and words used in this specification and claims are used merely to describe specific embodiments and are not intended to limit the invention.

[0022] For example, a singular expression includes a plural expression unless the context clearly indicates otherwise. Furthermore, terms such as "include," "equip," or "have" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0023] Furthermore, when a part such as a layer, membrane, region, or plate is said to be "above" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when a part such as a layer, membrane, region, or plate is said to be "below" another part, this includes not only the case where it is "directly below" the other part, but also the case where there is another part in between.

[0024] In addition, terms including ordinal numbers, such as "first," "second," etc., used in this specification may be used to describe various components, but said components are not limited by said terms, and said terms are used solely for the purpose of distinguishing one component from another.

[0025] Hereinafter, in describing an embodiment of the present invention in detail with reference to the drawings, the same reference numerals are used for identical components, and for clarity, only the different parts are described primarily to avoid duplication as much as possible.

[0026] FIG. 1 is a front view of a die-casting device according to the present invention, FIG. 2 is a cross-sectional view along line II-II of FIG. 1, FIG. 3 is a cross-sectional view along line III-III of FIG. 2, FIG. 4 is a cross-sectional view along line IV-IV of FIG. 1, and FIG. 5 is a cross-sectional view along line V-V of FIG. 4. As illustrated, the die-casting device according to the present invention comprises a fixed die plate (100), a movable die plate (200) corresponding to the fixed die plate (100), a sleeve block (300) detachably coupled to the fixed die plate (100) and having at least one sleeve (310) formed therein, a support plate (400) having at least one sleeve rod (430) corresponding to each sleeve (310), and a device for reciprocating the support plate (400) toward the fixed die plate (100). It includes a driving unit (500).

[0027] The above-mentioned movable die plate (200) is similar to the conventional one, so a detailed description is omitted.

[0028] In addition, the above-mentioned drive unit (500) is preferably a hydraulic cylinder that facilitates high-pressure pressing. Since this hydraulic cylinder type drive unit (500) is substantially similar to conventional ones, a detailed description will be omitted.

[0029] The fixed die plate (100) has a fixed core (120) formed with a cavity facing the movable die plate (200) fixed thereto.

[0030] And, a sleeve block (300) having at least one sleeve (310) formed thereon is detachably coupled to the fixed die plate (100).

[0031] In this case, a sleeve block installation hole (110) is formed in the fixed die plate (100), and a step (111) may be formed in the sleeve block installation hole (110) to prevent the sleeve block (300) from being dislodged from the sleeve block installation hole (110) or being pushed toward the mold core (120).

[0032] The above-mentioned step (111) is formed in an annular shape along the edge of the sleeve block (300). Additionally, another step (301) corresponding to the step (111) of the sleeve block installation hole (110) is formed in the sleeve block (300).

[0033] In this embodiment, the sleeve block (300) is shown as being firmly fixed to the fixed die plate (100) by bolt fastening, but it is not limited to this and can be combined in various ways.

[0034] The sleeve block (300) configured in this manner forms a set for each part to be cast, and is replaced from the fixed die plate (100) when a new part is cast.

[0035] Therefore, the operator can easily design a gating system based on a multi-biscuit that satisfies optimal casting conditions during design while freely changing the position and quantity of the sleeves (310).

[0036] As a result, even if the size of the part to be cast increases, the position and quantity of the sleeve (310) can be freely changed so that the molten metal injected into the cavity can easily penetrate into every corner of the cavity, thereby enabling the production of a super-large cast part with high quality.

[0037] Meanwhile, the position of the sleeve rod (430) must be formed to be on the same horizontal line as the sleeve (310). However, as described above, if the position and quantity of the sleeve (310) change, removing the sleeve rod (430) fixed to the support plate (400) and re-attaching it to correspond to the changed position and quantity of the sleeve (310) requires a significant amount of manpower and time, and it is difficult to guarantee precision.

[0038] Considering these points, it is preferable that the support plate (400) comprises a body part (410) coupled to the driving unit (500) and a sleeve rod block (420) detachably coupled to the body part (410) and coupled with a sleeve rod (430).

[0039] In this case, the worker only needs to replace the sleeve rod block (420) from the body part (410) of the support plate (400), so the replacement of the sleeve rods (430) can be performed quickly and precisely.

[0040] In this embodiment, the sleeve load block (420) is shown as being firmly fixed to the support plate (400) by bolt fastening, but it is not limited to this and can be combined in various ways.

[0041] Accordingly, the sleeve block (300) and sleeve rod block (420) form a set for each part to be cast, and when a new part is cast, they are replaced from the fixed die plate (100) and support plate (400), respectively.

[0042] Meanwhile, it is preferable that a plurality of guide bars (600) are installed on the fixed die plate (100) to horizontally penetrate the edge of the support plate (400).

[0043] The guide bar (600) helps the support plate (400) to move back and forth while maintaining a stable horizontal state.

[0044] In this case, a through hole (440) through which a guide bar (600) passes is formed at the edge of the body portion (410) of the support plate (400). It is preferable that a linear bushing (610) be installed in the through hole (440) to minimize friction between the guide bar (600) and the through hole (440) and to facilitate smooth reciprocating movement of the body portion (410).

[0045] The die casting device of the present invention configured in this manner can change the position and quantity of sleeves (310) according to the part to be cast using sleeve blocks (300), thereby making it easy to design a gating system based on multi-biscuits that satisfies optimal casting conditions, allowing the molten metal injected into the cavity to penetrate very easily into every corner of the cavity, and as a result, it is possible to easily perform casting of an extra-large part formed as a single unit.

[0046] In addition, the present invention allows for the rapid and precise setting of the sleeves (310) and sleeve rods (430) even if the position and quantity of the sleeves (310) vary depending on the part to be cast, because the sleeve block (300) to which the sleeves (310) are fixed is detachably installed on the fixed die plate (100) and the sleeve rod block (420) to which the sleeve rods (430) are fixed is detachably installed on the support plate (400).

[0047] Although preferred embodiments of the present invention have been illustrated and described above with reference to the drawings, various modifications and changes may be made without departing from the spirit or scope of the invention as defined by the following claims, and such changes should also be included within the scope of the present invention.

Claims

1. Fixed die plate; A movable die plate corresponding to the above fixed die plate; A sleeve block detachably coupled to the fixed die plate and having at least one sleeve formed therein; A support plate having at least one sleeve rod corresponding to the sleeve; and A die casting device comprising a driving unit that reciprocates the support plate toward the fixed die plate.

2. In Paragraph 1, The above support plate is A body part coupled to the above-mentioned driving unit; and A die-casting device having a sleeve rod block that is detachably coupled to the body part and has the sleeve rod fixed thereto.

3. In Paragraph 1, A die-casting device having a plurality of guide bars installed on the fixed die plate to guide the reciprocating movement of the support plate by being inserted horizontally through the edge of the support plate.

4. In Paragraph 3, A through hole is formed at the edge of the above support plate through which a guide bar passes; A die-casting device equipped with a linear bushing in the above-mentioned through hole.

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