CN111702134A

CN111702134A - Casting mould of aluminum piston

Info

Publication number: CN111702134A
Application number: CN202010640839.7A
Authority: CN
Inventors: 吴晓明
Original assignee: Anhui Hengming Engineering Technology Co ltd
Current assignee: Anhui Hengming Engineering Technology Co ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2020-09-25

Abstract

The invention discloses an aluminum piston casting mold which comprises an upper mold, a lower mold and a base, wherein the lower mold comprises a slow flow mold and cavity molds on two sides, a pouring gate is arranged at the top of the upper mold and is communicated with a buffer tank through a main runner, the buffer tank is positioned in the slow flow mold of the lower mold, two sides of the buffer tank are respectively communicated with a piston cavity through sub-runners, the piston cavity is positioned in the cavity molds, a buffer plate is arranged at the top inside the buffer tank, the buffer plates are symmetrically arranged on two sides of the main runner, a buffer port is reserved between the bottom of the buffer plate and the bottom of the buffer tank, a baffle is arranged at the bottom inside the buffer tank, the baffle and the buffer plates are installed in a staggered mode, and a filter port is reserved between the top of the baffle and the top of the buffer tank. The invention can filter impurities without a filter screen, and simultaneously slows down the flow velocity of the aluminum liquid, thereby being beneficial to improving the casting quality.

Description

Casting mould of aluminum piston

Technical Field

The invention relates to the technical field of molds, in particular to a casting mold of an aluminum piston.

Background

With the increasing development of the machine manufacturing industry, such as the continuous progress of the engine piston manufacturing technology, the corresponding technical requirements on the lower core-pulling double-piston casting mold are higher and higher. In the well-known technique, the pouring mode that the product of loosing core down adopted is present is mostly gravity pouring mode, through the effect of earth's gravity, let aluminium liquid get into the die cavity through watering, the shaping of solidifying, the product percent of pass after in order to guarantee to process is high, in order to guarantee that aluminium liquid solidifies after getting into the die cavity, can not produce hot node in big place, cause the appearance of defective products, so, what present lower double piston casting die of loosing core mainly adopted has filter screen formula to water in double piston mould main part intracavity, but also need the feeding package to supply with aluminium liquid and just can guarantee product quality.

Disclosure of Invention

The invention aims to provide a casting mold of an aluminum piston, which aims to solve the problems that impurities in aluminum liquid cannot be effectively filtered out and the casting quality is influenced by too high flow speed of the aluminum liquid in casting in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an aluminum piston's casting mould, includes mould, lower mould and base, the lower mould comprises the die cavity mould of slow flow mould and both sides, the sprue gate has been seted up at the top of last mould, the sprue gate passes through sprue intercommunication dashpot, the dashpot is located the slow flow mould of lower mould, the both sides of dashpot are respectively through subchannel intercommunication piston cavity, piston cavity is located the die cavity mould, and the buffer board is installed at the top of the inside of dashpot, the both sides at the sprue are installed to the buffer board symmetry, leave the dashpot between the bottom of buffer board and the bottom of dashpot, the baffle is installed to the bottom of the inside of dashpot, baffle and the crisscross installation of buffer board, leave the filtration mouth between the top of baffle and the top of dashpot.

Preferably, the bottom plate is installed at the bottom of the cavity die, the sliding groove is formed in the top of the base, the sliding block is installed in the sliding groove in a sliding mode, and the sliding block is fixed to the bottom of the bottom plate.

Preferably, the bottom of the upper die is provided with a groove, a sleeve is fixed in the groove, and the top of the lower die is provided with a loop bar which is connected in the sleeve in a sliding manner.

Preferably, the bottom of the slow flow die is provided with a limiting groove, the tail end of the bottom plate is provided with a limiting block, and the limiting block is positioned in the limiting groove.

Preferably, the outer wall of the cavity die of the lower die is provided with a handle, and the handle is provided with a heat insulation pad.

Preferably, the lower die is made of MP-breathable steel.

Preferably, the top of the outer wall of the cavity die is provided with a buckle, and the buckle is connected with the upper die through a clamping groove.

Preferably, the bottom of the base is provided with a supporting seat, and the bottom of the supporting seat is provided with an anti-skid pad.

Compared with the prior art, the invention has the beneficial effects that:

when an aluminum piston needs to be cast, aluminum liquid is poured from a pouring gate, the aluminum liquid enters a buffer groove of a buffer die through a main runner, the aluminum liquid flows in from the buffer port between the bottom of the buffer plate and the bottom of the buffer groove, floating impurities in the aluminum liquid are separated from the floating impurities in the aluminum liquid due to the blocking of the buffer plate, the floating impurities cannot flow in from the buffer port, the aluminum liquid is stacked between the buffer plate and a baffle plate after flowing through the buffer plate, when the aluminum liquid is stacked to a certain height, the aluminum liquid flows into a piston type cavity from a filtering port between the baffle plate and the buffer groove, the impurities precipitated in the aluminum liquid are blocked by the baffle plate, the impurities precipitated in the aluminum liquid are left at the bottom of the buffer groove and cannot flow in from the filtering port, the floating and precipitated impurities in the aluminum liquid can be filtered simultaneously without a filter screen through the buffer plate and the baffle plate, and the flow speed of the aluminum liquid is properly reduced due to the blocking of the buffer plate, the air bubbles generated after flowing into the piston cavity are reduced, and the quality of the product is improved.

Drawings

Fig. 1 is a sectional view of a casting mold for an aluminum piston according to the present invention;

FIG. 2 is a side view of an aluminum piston casting mold according to the present invention;

FIG. 3 is an enlarged view of the casting mold A of the aluminum piston according to the present invention;

in the figure: 1-upper die, 2-lower die, 3-slide, 4-runner, 5-base, 6-stopper, 7-piston cavity, 8-inlay, 9-buckle, 10-loop bar, 11-sprue gate, 12-main runner, 13-buffer groove, 14-buffer plate, 15-runner, 16-bottom plate, 17-sleeve, 18-handle, 19-support seat, 20-baffle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, an aluminum piston casting mold, including last mould 1, lower mould 2 and base 5, lower mould 2 comprises the die cavity mould of slow flow mould and both sides, it has seted up sprue gate 11 to go up the top of mould 1, sprue gate 11 passes through sprue channel 12 intercommunication dashpot 13, dashpot 13 is located the slow flow mould of lower mould 2, the both sides of dashpot 13 communicate piston cavity 7 through subchannel 15 respectively, piston cavity 7 is located the die cavity mould, buffer board 14 is installed at the top of the inside of dashpot 13, buffer board 14 symmetry is installed in the both sides of sprue channel 12, leave the dashpot between the bottom of buffer board 14 and the bottom of dashpot 13, baffle 20 is installed to the bottom of the inside of dashpot 13, baffle 20 and buffer board 14 crisscross installation, leave the filtration mouth between the top of baffle 20 and the top of dashpot 13.

The bottom plate 16 is installed to the bottom of die cavity mould, and spout 4 has been seted up at the top of base 5, and slidable mounting has slider 3 in spout 4, and slider 3 is fixed in the bottom of bottom plate 16.

The bottom of the upper die 1 is provided with a groove, a sleeve 17 is fixed in the groove, the top of the lower die 2 is provided with a loop bar 10, and the loop bar 10 is connected in the sleeve 17 in a sliding manner.

The limiting groove is formed in the bottom of the slow flow die, the limiting block 6 is installed at the tail end of the bottom plate 16, the limiting block 16 is located in the limiting groove, the handle 18 is installed on the outer wall of the cavity die of the lower die 2, the heat insulation pad is installed on the handle 18, the lower die 2 is made of MP-35 breathable steel, the buckle 9 is installed at the top of the outer wall of the cavity die, the buckle 9 is connected with the upper die 1 through the clamping groove, the supporting seat 19 is installed at the bottom of the base 5, and the anti-slip pad is installed at the bottom of.

The working principle is as follows:

1. when an aluminum piston needs to be cast, aluminum liquid is poured in from a pouring gate 11, the aluminum liquid enters a buffer groove 13 of a buffer die through a main runner 12, the aluminum liquid flows in from a buffer port between the bottom of a buffer plate 14 and the bottom of the buffer groove 13, floating impurities in the aluminum liquid are separated from the floating impurities in the aluminum liquid due to the blocking of the buffer plate 14, the floating impurities cannot flow in from the buffer port, the aluminum liquid flows through the buffer plate 14 and is stacked between the buffer plate 14 and a baffle plate 20, when the aluminum liquid is stacked to a certain height, the aluminum liquid flows into a piston cavity 7 from a filter port between the baffle plate 20 and the buffer groove 13, the impurities precipitated in the aluminum liquid are blocked by the baffle plate 20, the impurities precipitated in the aluminum liquid are left at the bottom of the buffer groove 13 and cannot flow in from the filter port, the floating and precipitated impurities in the aluminum liquid can be simultaneously filtered through the buffer plate 14 and the baffle plate 20 without a filter screen, and the blocking of the baffle plate 14 and the baffle plate 20, the flow velocity of the aluminum liquid is properly reduced, bubbles generated after the aluminum liquid flows into the piston cavity 7 are reduced, and the quality of products is improved.

2. The aluminum liquid flows into a piston cavity 7 of the cavity die through a sub-runner 15, and the lower die 2 is made of MP-35 breathable steel. The PM-35 air permeable steel is a high-quality air permeable steel, the interior of the PM-35 air permeable steel is formed by connecting fine small holes, air or any gas can smoothly permeate and penetrate through the PM-35 air permeable steel, the gas in the piston cavity 7 is discharged to the outside through the air permeable steel, the influence on the quality of an aluminum piston caused by excessive expansion of the gas in the piston cavity 7 is prevented, after the interior of the piston cavity 7 is cooled, the handle 18 is pulled, a cavity die in the lower die 2 slides out of the lower die 2 through the sliding block 3 in the sliding groove 4, the cooled aluminum piston is taken out, the cavity die is pushed into the lower die 2 through the handle 18 after being taken out, and the position of the cavity die is fixed through the buckle 9. The design of one mould two-chamber makes the operation simple and easy convenient, has promoted the quality of aluminium piston.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The casting mold for the aluminum piston comprises an upper mold (1), a lower mold (2) and a base (5), and is characterized in that the lower mold (2) consists of a slow flow mold and cavity molds on two sides, a pouring port (11) is formed in the top of the upper mold (1), the pouring port (11) is communicated with a buffer tank (13) through a main runner (12), the buffer tank (13) is located in the slow flow mold of the lower mold (2), two sides of the buffer tank (13) are communicated with a piston cavity (7) through branch runners (15) respectively, the piston cavity (7) is located in the cavity molds, a buffer plate (14) is installed at the top of the inner part of the buffer tank (13), the buffer plate (14) is symmetrically installed on two sides of the main runner (12), a buffer port is reserved between the bottom of the buffer plate (14) and the bottom of the buffer tank (13), a baffle plate (20) is installed at the bottom of the inner part of the buffer tank (13), the baffle plates (20) and the buffer plates (14) are arranged in a staggered mode, and a filter opening is reserved between the top end of each baffle plate (20) and the top of the buffer groove (13).

2. The casting mold for the aluminum piston according to claim 1, wherein a bottom plate (16) is installed at the bottom of the cavity mold, a sliding groove (4) is formed in the top of the base (5), a sliding block (3) is installed in the sliding groove (4), and the sliding block (3) is fixed at the bottom of the bottom plate (16).

3. The casting mold for the aluminum piston as recited in claim 1, characterized in that the bottom of the upper mold (1) is provided with a groove, a sleeve (17) is fixed in the groove, the top of the lower mold (2) is provided with a loop bar (10), and the loop bar (10) is slidably connected in the sleeve (17).

4. The casting mold of the aluminum piston as recited in claim 1, wherein a limiting groove is formed at the bottom of the slow flow mold, a limiting block (6) is installed at the end of the bottom plate (16), and the limiting block (6) is located in the limiting groove.

5. The casting mold of an aluminum piston as recited in claim 1, wherein a handle (18) is installed on an outer wall of the cavity mold of the lower mold (2), and a heat insulating pad is installed on the handle (18).

6. The casting mold of an aluminum piston as claimed in claim 1, wherein the lower mold (2) is made of MP-35 gas permeable steel.

7. The casting mold for the aluminum piston as recited in claim 1, characterized in that a buckle (9) is installed on the top of the outer wall of the cavity mold, and the buckle (9) is connected with the upper mold (1) through a clamping groove.

8. The casting mold of an aluminum piston according to claim 1, characterized in that the bottom of the base (5) is provided with a support seat (19), and the bottom of the support seat (19) is provided with a non-slip mat.