Inner core-pulling and pitched roof knockout mechanism of aluminum alloy flywheel casing extrusion casting mold

Abstract

The utility model discloses an inner core pulling and pitched roof knockout mechanism of an aluminum alloy flywheel casing extrusion casting die, and relates to the field of flywheel casing die design and extrusion casting. An inner loose core of an aluminum alloy flywheel casing squeeze casting die comprises a cylindrical insert, an inner loose core and a plurality of inner loose cores, and the outer side of the cylindrical insert is obliquely arranged; the arc-shaped inserts I are symmetrically mounted on the two sides of the cylindrical insert; the inner core-pulling structure of the metal mold is designed aiming at the situation that a flywheel cavity of a flywheel shell cannot be directly opened and only a sand core can be used, the traditional sand core is replaced, the effects of higher production efficiency and lower casting cost are achieved, and the production cost is reduced by optimizing the mold structure. And due to the limitation of the flywheel shell structure, only an inherent casting process can be adopted, other casting processes are possibly selected, and by changing the casting process, the efficiency is further improved, and the cost is further reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of flywheel housing mold design and squeeze casting, and specifically relates to an internal core-pulling and inclined ejector knocking mechanism for an aluminum alloy flywheel housing squeeze casting mold. Background Technique

[0002] The flywheel housing is a cast iron part installed between the engine and the transmission, externally connected to the crankcase, starter, and oil pan, and internally installed with a flywheel assembly, playing the role of connecting the engine body, protecting, and supporting. Its main function is to achieve an effective connection between the engine and the transmission to meet the needs of different types of automotive markets.

[0003] Due to the design of some flywheel housings, the inner cavity diameter of the flywheel cavity of the flywheel housing is large, and the diameter of the stop is small, which results in limitations in the selection of casting processes. It can only be molded by using the aluminum alloy low-pressure casting process or gravity casting process. Since the above-mentioned die-casting methods are used, the sand core needs to be repeatedly placed for each mold, which greatly increases the unit cost of the flywheel housing. Moreover, the low-pressure casting or gravity casting process requires a relatively high aluminum liquid temperature, so the solidification time of the flywheel housing is relatively long and the production efficiency is low. In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0004] The technical problem to be solved by the present utility model is to overcome the deficiencies of the prior art and provide an internal core-pulling and inclined ejector knocking mechanism for an aluminum alloy flywheel housing squeeze casting mold that can overcome or at least partially solve the above problems.

[0005] To solve the above technical problems, the basic concept of the technical solution adopted by the present utility model is: an internal core-pulling of an aluminum alloy flywheel housing squeeze casting mold, including: a cylindrical insert block, the outer side of the cylindrical insert block is inclined; a first arc-shaped insert block, symmetrically installed on both sides of the cylindrical insert block; a second arc-shaped insert block, symmetrically slidably connected to both sides of the cylindrical insert block; the two symmetrically arranged first arc-shaped insert blocks and the two symmetrically arranged second arc-shaped insert blocks are vertically distributed, the adjacent side surfaces between the first arc-shaped insert block and the second arc-shaped insert block are in contact, the height of the second arc-shaped insert block is higher than the height of the first arc-shaped insert block, the shape of the first arc-shaped insert block is an inverted isosceles trapezoid, the shape of the second arc-shaped insert block is a regular isosceles trapezoid; a lifting column is fixedly connected to the cylindrical insert block.

[0006] The lifter ejection mechanism of an extrusion casting die for an aluminum alloy flywheel housing includes the internal core-pulling of an extrusion casting die for an aluminum alloy flywheel housing, and also includes a lower die. A barrel is installed on the lower die. A middle die is placed at the upper end of the lower die, and an upper die is placed at the upper end of the middle die. Two groups of sliders are symmetrically arranged between the middle die and the upper die. The two groups of sliders are cross-shaped and distributed between the middle die and the upper die. A flywheel housing cavity is formed between the lower die, the middle die, the upper die, and the sliders and the interiors of a cylindrical insert, a first arc-shaped insert, and a second arc-shaped insert. The barrel is communicated with the flywheel housing cavity.

[0007] In order to facilitate better breaking and separating between the solidified slug in the barrel and the gate sleeve on the solidified flywheel housing, further, a circle of spiral grooves is equidistantly arranged in a circumferential manner at a position near the flywheel housing cavity at the upper end of the barrel.

[0008] After adopting the above technical solution, the present utility model has the following beneficial effects compared with the prior art: In view of the situation that the flywheel cavity of the flywheel housing cannot be directly opened and only sand cores can be used, the present utility model designs an internal core-pulling structure of a metal die, replacing the traditional sand core, and achieving the effects of faster production efficiency and lower casting cost.

[0009] By optimizing the die structure, it makes it possible to change from the inherent casting process that is limited by the flywheel housing structure to other casting processes. Through the change of the casting process, the efficiency is further improved and the cost is reduced.

[0010] The following further describes in detail the specific implementation manners of the present utility model with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In the drawings:

[0012] Figure 1 is the structural schematic diagram of the internal core-pulling of the present utility model;

[0013] Figure 2 is the structural schematic diagram of the lifter ejection mechanism of the present utility model;

[0014] Figure 3 is the cross-sectional structural schematic diagram of the lifter ejection mechanism of the present utility model.

[0015] In the figure: 1, cylindrical insert; 101, first arc-shaped insert; 102, second arc-shaped insert; 103, lifting column; 2, lower die; 201, barrel; 202, spiral groove; 3, middle die; 4, upper die; 5, slider. DETAILED DESCRIPTION OF THE INVENTION

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will, in conjunction with the accompanying drawings in the embodiments of the present utility model, clearly and completely describe the technical solutions in the embodiments. The following embodiments are used to illustrate the present utility model but are not intended to limit the scope of the present utility model.

[0017] Embodiment 1:

[0018] Referring to Figure 1 , an internal core-pulling mechanism for an extrusion casting mold of an aluminum alloy flywheel housing includes: a cylindrical insert 1, with the outer side of the cylindrical insert 1 being inclined; arc-shaped inserts one 101, symmetrically installed on both sides of the cylindrical insert 1; arc-shaped inserts two 102, symmetrically and slidably connected to both sides of the cylindrical insert 1; the two symmetrically arranged arc-shaped inserts one 101 and the two symmetrically arranged arc-shaped inserts two 102 are vertically distributed, the adjacent side surfaces between the arc-shaped insert one 101 and the arc-shaped insert two 102 are in contact, the height of the arc-shaped insert two 102 is higher than the height of the arc-shaped insert one 101, the shape of the arc-shaped insert one 101 is an inverted isosceles trapezoid, and the shape of the arc-shaped insert two 102 is a regular isosceles trapezoid; a lifting column 103 is fixedly connected to the cylindrical insert 1.

[0019] When the flywheel housing in the mold solidifies and needs to be removed from the mold, at this time, the worker can pull the cylindrical insert 1 upward through the lifting column 103, and the cylindrical insert 1 will drive the arc-shaped inserts one 101 to approach the middle at the same time. When the cylindrical insert 1 rises to the upper limit in the vertical direction, at this time, the two arc-shaped inserts two 102 will move downward at the same time, and the bottom will move and tilt toward the middle to eject the flywheel housing. Then, the flywheel housing will be separated from the mold and this internal core-pulling mechanism under the impact of the arc-shaped insert one 101 and the pushing of the arc-shaped insert two 102, so that the flywheel housing can be smoothly demolded.

[0020] Embodiment 2:

[0021] Referring to Figures 1-3 , an inclined ejector feeding mechanism for an extrusion casting mold of an aluminum alloy flywheel housing includes an internal core-pulling mechanism for an extrusion casting mold of an aluminum alloy flywheel housing, and further includes a lower mold 2, a material cylinder 201 is installed on the lower mold 2, a middle mold 3 is placed at the upper end of the lower mold 2, an upper mold 4 is placed at the upper end of the middle mold 3, two groups of sliders 5 are symmetrically arranged between the middle mold 3 and the upper mold 4, the two groups of sliders 5 are cross-shaped and distributed between the middle mold 3 and the upper mold 4. A flywheel housing cavity is formed between the lower mold 2, the middle mold 3, the upper mold 4, and the sliders 5 and the inside of the cylindrical insert 1, the arc-shaped insert one 101, and the arc-shaped insert two 102, and the material cylinder 201 is communicated with the flywheel housing cavity.

[0022] A circle of spiral grooves 202 is circumferentially and equidistantly opened at a position near the flywheel housing cavity at the upper end of the material cylinder 201.

[0023] When casting an aluminum alloy flywheel housing using the squeeze casting die for the aluminum alloy flywheel housing provided with this mechanism, the staff first place the squeeze casting die for the aluminum alloy flywheel housing with this mechanism in a specific position. Then, the molten aluminum melted at high temperature can be injected from the barrel 201 into the flywheel housing cavity formed between the lower die 2, the middle die 3, the upper die 4, and the inside of the slider 5 and the cylindrical insert 1, the first arc insert 101, and the second arc insert 102. After the aluminum water cools and solidifies, at this time, the middle die 3, the upper die 4, and the two sliders 5 can be controlled to move upward simultaneously. Then, the spiral groove 202 provided on the barrel 201 can be used to break and separate the solidified slug in the barrel 201 from the sprue bushing on the solidified flywheel housing. After the slug is taken out, the middle die 3, the upper die 4, and the two sliders 5 are lowered and placed back on the lower die 2. Then, the upper die 4 is separated from the middle die 3. Then, the slider 5 is moved outward, and the cast flywheel housing can be exposed. Then, the internal core-pulling mechanism is operated according to the movement described in Embodiment 1, and the flywheel housing can be demolded and taken out of the mold.

[0024] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention.

Claims

1. The internal core-pulling of an extrusion casting die for an aluminum alloy flywheel housing, characterized in that, Comprising: A cylindrical insert (1), the outer side of the cylindrical insert (1) being inclined; An arc-shaped insert one (101), symmetrically installed on both sides of the cylindrical insert (1); An arc-shaped insert two (102), symmetrically and slidably connected to both sides of the cylindrical insert (1); The two symmetrically arranged arc-shaped inserts one (101) and the two symmetrically arranged arc-shaped inserts two (102) are vertically distributed. The adjacent side surfaces between the arc-shaped insert one (101) and the arc-shaped insert two (102) are in contact. The height of the arc-shaped insert two (102) is higher than the height of the arc-shaped insert one (101). The shape of the arc-shaped insert one (101) is an inverted isosceles trapezoid, and the shape of the arc-shaped insert two (102) is a regular isosceles trapezoid; A lifting column (103) is fixedly connected to the cylindrical insert (1).

2. The inclined ejector mechanism of an extrusion casting die for an aluminum alloy flywheel housing, comprising the inner core-pulling of the extrusion casting die for an aluminum alloy flywheel housing as described in claim 1, characterized in that, It further includes a lower die (2). A material cylinder (201) is installed on the lower die (2). A middle die (3) is placed at the upper end of the lower die (2), and an upper die (4) is placed at the upper end of the middle die (3). Two groups of sliders (5) are symmetrically arranged between the middle die (3) and the upper die (4). The two groups of sliders (5) are cross-shapedly distributed between the middle die (3) and the upper die (4). A flywheel housing cavity is formed between the lower die (2), the middle die (3), the upper die (4), and the sliders (5) and the interiors of the cylindrical insert (1), the arc-shaped insert one (101), and the arc-shaped insert two (102). The material cylinder (201) is communicated with the flywheel housing cavity.

3. The ejector mechanism of the inclined ejector for the squeeze casting die of an aluminum alloy flywheel housing according to claim 2, characterized in that, A circle of spiral grooves (202) is circumferentially and equidistantly opened at a position near the flywheel housing cavity at the upper end of the material cylinder (201).

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