CN114210928A

CN114210928A - Casting mold capable of improving casting yield

Info

Publication number: CN114210928A
Application number: CN202111302221.0A
Authority: CN
Inventors: 岑进彪
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2022-03-22

Abstract

The invention discloses a casting mold capable of improving the yield of castings, which comprises a pressing plate and a base, wherein a casting pressing block is fixedly arranged below the pressing plate, a casting groove body is fixedly arranged on the base, two sealing cylinders are symmetrically arranged in the base, sealing plates are slidably arranged in the two sealing cylinders, and fixing shafts are fixedly connected to the two sealing plates. Has the advantages that: the heat conduction piece can be along with the motion of heat insulating board earlier with the conducting strip contact, make the heating device can fully preheat the casting cell body, avoid liquid material and casting cell body contact department quick cooling, lead to foundry goods surface or inside gas pocket to appear, through setting up the time delay relay, after a definite time, go up a section of thick bamboo upward movement and break away from the casting cell body, vibrating device just can let in the electric current, in order to avoid going up a section of thick bamboo when vibrations and round groove between produce the clearance, go up a section of thick bamboo and make for elastic metal material, can enlarge vibrations, make the gaseous outwards discharge in the liquid material, improve the defoaming effect.

Description

Casting mold capable of improving casting yield

Technical Field

The invention relates to the technical field of casting processing, in particular to a casting mold capable of improving the yield of castings.

Background

The existing metal parts are mostly formed by casting, so that the production cost can be reduced, the metal parts with complex structures can be processed by designing a mould, the limitation of the size and the shape is small, but the rejection rate in the casting process is high, the main reason is that the casting structure is not compact enough, and the defects of shrinkage cavities, air pockets, air holes and the like exist, the air holes only existing on the surface of the casting can be easily detected by visual observation or optical system identification, and the improvement is carried out by means of polishing and the like, and the air holes in the casting are difficult to detect and repair.

The external factors of forming air holes in the casting are mainly that the preheating temperature of the mold is too low, so that liquid metal is cooled too fast when passing through a pouring system, and air is mixed in the pouring process of the liquid material, so that the casting mold capable of improving the yield of the casting is provided.

Disclosure of Invention

The invention aims to solve the problems that in the prior art, when a liquid material contacts a mold, the temperature of the mold is low, and gas in the liquid material cannot be discharged in the pouring process, so that air holes are easily formed in a casting, and the rejection rate in the casting processing process is high, and provides a casting mold capable of improving the yield of the casting.

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

the utility model provides a can improve casting mould of foundry goods yields, includes clamp plate and base, the below fixed mounting of clamp plate has the casting briquetting, fixed mounting has the casting cell body on the base, the symmetry is provided with two sealed section of thick bamboos, two in the sealed section of thick bamboo equal slidable mounting has the closing plate, two on the closing plate equal fixedly connected with fixed axle, the upper end of two fixed axles all run through the top of corresponding sealed section of thick bamboo and with the lower fixed surface of clamp plate be connected, two the periphery of fixed axle all around being equipped with first spring, two the upper end of first spring all with clamp plate fixed connection, two the lower extreme of first spring all with base fixed connection, the transfer storehouse, two are equipped with to the level safety in the base all intercommunication has the return bend between sealed section of thick bamboo and the transfer storehouse, still be equipped with defoaming mechanism in the base and preheat the mechanism.

Further, two all install first valve on the return bend, two all communicate there is the elasticity pipeline, two between sealed section of thick bamboo and the transfer storehouse the second valve is all installed, two to the junction in elasticity pipeline and transfer storehouse first valve is one-way solenoid with two second valves.

Further, defoaming mechanism includes the telescope tube that is linked together with the transfer storehouse, and the telescope tube is vertical installation upwards, the telescope tube includes interior barrel and outer barrel, and sealed sliding connection between interior barrel and the outer barrel, telescopic tube's interior barrel fixed stay has the heat insulating board, two moving contacts are installed to the symmetry on the heat insulating board.

Further, defoaming mechanism still includes two support casings of symmetric distribution in casting cell body below, two place down a section of thick bamboo, two in the support casing the top sealing connection of a section of thick bamboo down has last section of thick bamboo, and the corresponding lower section of thick bamboo in position constitutes a hollow sealed cylinder with last section of thick bamboo jointly, two circular slots have been seted up to the symmetry on the diapire of casting cell body, and two go up a section of thick bamboo be located corresponding circular slot respectively and with circular slot sealing sliding connection.

Furthermore, the bottom of each of the two lower barrels is embedded with a static contact, the two static contacts are respectively positioned right above the corresponding moving contact, the two lower barrels are respectively provided with a time delay relay, and the two upper barrels are respectively provided with a vibration device.

Further, preheat the mechanism and include the device that heats, and the symmetrical connection has a plurality of second springs between device and the heat insulating board that heats, the device that heats includes the conducting strip, fixed mounting has the conducting strip on the lateral wall of casting cell body, the position of conducting strip is corresponding with the position of conducting strip.

Further, the distance between the heat conducting block and the heat conducting fin is smaller than the distance between the moving contact and the fixed contact, and a plurality of supporting frameworks are symmetrically arranged between the casting groove body and the base.

The invention has the following advantages:

the heat conducting block is firstly contacted with the heat conducting fins along with the movement of the heat insulating plate, so that the temperature increasing device can fully preheat the casting tank body, and the contact part of the liquid material and the casting tank body is prevented from being rapidly cooled, so that air holes are formed on the surface or inside of a casting;

the heat conducting sheet can uniformly transfer the heat of the heat conducting block to the casting groove body, so that the temperature of all parts of the casting groove body is approximately the same;

by arranging the time delay relay, after a certain time, the upper cylinder moves upwards and is separated from the casting groove body, the current can be introduced into the vibration device so as to prevent the upper cylinder from generating a gap with the circular groove when vibrating, and the upper cylinder is made of elastic metal materials, so that the vibration can be amplified, and the defoaming effect is improved;

when the second valve is opened, the moving contact can be quickly separated from the fixed contact, so that the upper cylinder does not vibrate any more, and liquid materials can be prevented from entering between the circular groove and the upper cylinder;

when the upper cylinder vibrates, the bubbles in the liquid material can be shattered, so that the gas in the liquid material is discharged outwards, the probability of pores in the casting is reduced, and the quality of the casting is improved;

the first valve and the second valve are both one-way electromagnetic valves, and when the second valve is closed, liquid in the elastic pipeline cannot flow back to the transfer bin, so that the heat insulation plate does not move upwards again.

Drawings

FIG. 1 is a schematic structural diagram of a casting mold capable of improving the yield of castings according to the present invention;

FIG. 2 is a schematic connection diagram of a transfer bin portion of a casting mold capable of improving the yield of castings according to the present invention;

FIG. 3 is a schematic structural diagram of a lower barrel part of a casting mold capable of improving the yield of castings according to the present invention;

fig. 4 is an enlarged view of a portion a in fig. 1.

In the figure: the device comprises a pressing plate 1, a fixing shaft 2, a casting pressing block 3, a casting groove 4, a first spring 5, a base 6, a sealing barrel 7, an elbow 8, a first valve 9, a transfer bin 10, an expansion sleeve 11, a second valve 12, an elastic pipeline 13, a sealing plate 14, a thermal insulation plate 15, a movable contact 16, a second spring 17, a heating device 18, a heat conduction block 19, a support framework 20, a heat conduction sheet 21, a support shell 22, a lower barrel 23, a static contact 24, a time delay relay 25, a vibration device 26 and an upper barrel 27.

Detailed Description

Referring to fig. 1-4, a casting mold capable of improving the yield of castings comprises a pressure plate 1 and a base 6, a casting press block 3 is fixedly installed below the pressure plate 1, a mechanism for driving the pressure plate 1 and the casting press block 3 is not shown, a casting groove body 4 is fixedly installed on the base 6, two sealing cylinders 7 are symmetrically arranged in the base 6, sealing plates 14 are respectively installed in the two sealing cylinders 7 in a sliding manner, fixing shafts 2 are respectively fixedly connected to the two sealing plates 14, the upper ends of the two fixing shafts 2 penetrate through the tops of the corresponding sealing cylinders 7 and are fixedly connected with the lower surface of the pressure plate 1, first springs 5 are respectively wound on the peripheries of the two fixing shafts 2, the upper ends of the two first springs 5 are respectively fixedly connected with the pressure plate 1, the lower ends of the two first springs 5 are respectively fixedly connected with the base 6, the first springs 5 can support the pressure plate 1, and the casting press block 3 are reset, a transfer bin 10 is horizontally arranged in the base 6, bent pipes 8 are communicated between the two sealing barrels 7 and the transfer bin 10, and a defoaming mechanism and a preheating mechanism are further arranged in the base 6.

The two bent pipes 8 are respectively provided with a first valve 9, the two sealing barrels 7 and the transfer bin 10 are respectively communicated with an elastic pipeline 13, the joints of the two elastic pipelines 13 and the transfer bin 10 are respectively provided with a second valve 12, the two first valves 9 and the two second valves 12 are respectively one-way solenoid valves, stable insulating liquid is contained in the sealing barrels 7, when the first valves 9 are opened, the liquid in the sealing barrels 7 can flow to the transfer bin 10, when the second valves 12 are opened, the liquid in the transfer bin 10 can flow to the elastic pipelines 13, the densities and viscosities of the liquid in the sealing barrels 7 and the transfer bin 10 and the liquid material in the casting groove body 4 are different, after the liquid in the transfer bin 10 flows to the elastic pipelines 13, the descending speed of the upper barrel 27 and the lower barrel 23 is smaller than the descending speed of the movable contact 16, namely, after the second valves 12 are opened, the movable contact 16 can be quickly separated from the fixed contact 24, causing the vibration device 26 to be turned off;

because the second valve 12 is a one-way solenoid valve, when the second valve 12 is closed, the liquid in the elastic pipe 13 does not flow back to the transfer chamber 10, so as to prevent the heat insulation plate 15 from moving upwards again.

Defoaming mechanism includes the telescopic tube 11 that is linked together with transfer bin 10, and telescopic tube 11 is vertical upward installation, and telescopic tube 11 includes interior barrel and outer barrel, and sealed sliding connection between interior barrel and the outer barrel, and telescopic tube 11's interior barrel fixed stay has heat insulating board 15, and two moving contacts 16 are installed to the symmetry on heat insulating board 15.

Defoaming mechanism still includes two support casings 22 of symmetric distribution in casting cell body 4 below, lower section of thick bamboo 23 has been placed in two support casings 22, the top sealing connection of two lower section of thick bamboos 23 has last section of thick bamboo 27, and the corresponding lower section of thick bamboo 23 in position constitutes a hollow sealed cylinder with last section of thick bamboo 27 jointly, two circular slots have been seted up to the symmetry on the diapire of casting cell body 4, and two last section of thick bamboos 27 are located corresponding circular slot respectively and with the sealed sliding connection of circular slot, when last section of thick bamboo 27 upwards slides, the circular slot still can keep encapsulated situation, and when last section of thick bamboo 27 was located initial position, the top of last section of thick bamboo 27 flushes with the inner bottom wall of casting cell body 4.

The bottom of each of the two lower tubes 23 is embedded with a static contact 24, the two static contacts 24 are respectively located right above the corresponding moving contact 16, the moving contact 16 and the static contacts 24 are matched with each other, each of the two lower tubes 23 is provided with a time delay relay 25, each of the two upper tubes 27 is provided with a vibration device 26, when the moving contact 16 abuts against the static contact 24, a circuit where the time delay relay 25 and the vibration device 26 are located is conducted, the vibration device 26 is turned on after a certain time, the "certain time" refers to the time taken for the upper tube 27 to move from an initial position to a position where the upper tube 27 is completely separated from the circular groove, the vibration device 26 is a vibration motor or the like in the prior art, the upper tube 27 is made of an elastic metal sheet, and the amplitude during vibration is slightly large.

The preheating mechanism comprises a temperature increasing device 18, a plurality of second springs 17 are symmetrically connected between the temperature increasing device 18 and the heat insulation plate 15, the temperature increasing device 18 comprises a heat conducting block 19, a heat conducting sheet 21 is fixedly mounted on the outer side wall of the casting groove body 4, the position of the heat conducting block 19 corresponds to the position of the heat conducting sheet 21, and the temperature increasing device 18 refers to a heater or the like in the prior art.

The distance between the heat conduction block 19 and the heat conduction sheet 21 is smaller than the distance between the movable contact 16 and the fixed contact 24, so that the casting tank body 4 is fully preheated, the heat conduction sheet 21 can uniformly transfer heat to the casting tank body 4, the temperature difference at each position of the casting tank body 4 is prevented from being large, and a plurality of supporting frameworks 20 are symmetrically arranged between the casting tank body 4 and the base 6.

When the device is used, the pressure plate 1 drives the casting pressure block 3 to descend for a certain distance firstly to prepare for a casting process, when the fixed shaft 2 drives the sealing plate 14 to move downwards, the external controller controls the first valve 9 to be opened, liquid in the sealing barrel 7 can flow into the transfer bin 10 through the bent pipe 8, the second valve 12 is in a closed state at the moment, so that the heat insulation plate 15 is lifted upwards, the telescopic sleeve 11 comprises an inner barrel body and an outer barrel body, the inner barrel body is connected with the outer barrel body in a sealing and sliding mode, when the liquid in the transfer bin 10 is increased, the telescopic sleeve 11 is forced to extend upwards, otherwise, when the liquid in the transfer bin 10 is reduced, the telescopic sleeve 11 is shortened;

because the distance between the heat conducting block 19 and the heat conducting fin 21 is smaller than the distance between the movable contact 16 and the fixed contact 24, the heat conducting block 19 contacts with the heat conducting fin 21 firstly along with the movement of the heat insulation plate 15, so that the temperature increasing device 18 can preheat the casting tank body 4, the contact part of the liquid material and the casting tank body 4 is prevented from being cooled rapidly, in the process, the heat conducting fin 21 can uniformly transmit heat to the casting tank body 4, and the temperature of all parts of the casting tank body 4 is approximately the same;

with the continuous rising of the heat insulation board 15, the second spring 17 is compressed, the two movable contacts 16 pass through the support shell 22 and abut against the corresponding lower cylinder 23, and at the moment, the movable contacts 16 are in contact with the fixed contacts 24, so that the circuit where the time delay relay 25 and the vibration device 26 are located is conducted;

in the process, the liquid material can flow into the casting trough body 4 quantitatively and at a constant speed, and a feeding port on the casting trough body 4 and a device for feeding are not shown in the figure;

under time delay relay 25's effect, vibrating device 26 is in the outage state, and after a certain time, go up a 27 upward movements and break away from casting cell body 4, vibrating device 26 just can let in the electric current, and when vibrating device 26 opened, go up the vibrations that a 27 can be quick, shakes the bits of broken glass with the bubble in the liquid material, makes the gaseous outwards discharge in the liquid material, reduces the inside probability that appears the gas pocket of foundry goods, improves the foundry goods quality.

After the liquid material is injected, the external controller controls the second valve 12 to be opened and the first valve 9 to be closed, and under the action of the gravity of the defoaming mechanism and the preheating mechanism, the heat insulation plate 15 moves downwards, so that the heat conduction block 19 is separated from the heat conduction sheet 21, and the movable contact 16 is also separated from the static contact 24;

it should be noted that, because the density and the viscosity of the liquid in the sealing cylinder 7 and the transfer bin 10 are different from those of the liquid material in the casting trough 4, the descending speed of the upper cylinder 27 and the lower cylinder 23 is smaller than that of the movable contact 16, that is, after the second valve 12 is opened, the movable contact 16 is quickly separated from the fixed contact 24, so that the vibrating device 26 is closed, and when the upper cylinder 27 falls back to the initial position, the upper cylinder 27 does not vibrate any more, and the liquid material can be prevented from entering between the circular trough and the upper cylinder 27;

when the pressing plate 1 continues to drive the casting pressing block 3 to continue descending, and the casting pressing block 3 enters the casting groove body 4, liquid in the sealing cylinder 7 directly enters the elastic pipeline 13, and the second valve 12 is a one-way electromagnetic valve, so that when the second valve 12 is closed, the liquid in the elastic pipeline 13 cannot flow back to the transfer bin 10, and the heat insulation plate 15 is prevented from moving upwards again;

after the casting material is cooled, the pressing plate 1 drives the casting pressing block 3 to move upwards, the sealing plate 14 slides upwards along with the casting pressing block, the first spring 5 can support the pressing plate 1, the pressing plate 1 and the casting pressing block 3 are assisted to reset, and liquid in the elastic pipeline 13 can automatically return to the sealing cylinder 7 under the action of pressure intensity, so that the elastic pipeline 13 restores to the initial form;

in particular, in order to ensure that the heat insulation plate 15 can be completely lowered to the initial position, the position of the elastic duct 13 may be moved downward, and the connection point of the elastic duct 13 and the transfer bin 10 may be disposed at the bottom of the transfer bin 10;

it should be noted that, when the shape or structure of the casting is complicated, the fixing shaft 2 can be separated from the pressing plate 1, and the positions of the fixing shaft 2 and the sealing plate 14 can be adjusted by an external device, so as to change the preheating duration of the casting trough body 4 and the defoaming duration of the liquid material, thereby meeting the actual casting requirement.

Claims

1. The casting mold capable of improving the yield of castings comprises a pressing plate (1) and a base (6), wherein a casting pressing block (3) is fixedly installed below the pressing plate (1), a casting groove body (4) is fixedly installed on the base (6), and the casting mold is characterized in that two sealing cylinders (7) are symmetrically arranged in the base (6), sealing plates (14) are installed in the two sealing cylinders (7) in a sliding mode, fixing shafts (2) are fixedly connected to the two sealing plates (14), the upper ends of the two fixing shafts (2) penetrate through the tops of the corresponding sealing cylinders (7) and are fixedly connected with the lower surface of the pressing plate (1), first springs (5) are wound on the peripheries of the two fixing shafts (2), the upper ends of the two first springs (5) are fixedly connected with the pressing plate (1), and the lower ends of the two first springs (5) are fixedly connected with the base (6), transfer storehouse (10) are equipped with to horizontal installation in base (6), two all communicate between sealed section of thick bamboo (7) and transfer storehouse (10) return bend (8), still be equipped with defoaming mechanism and preheat the mechanism in base (6).

2. The casting mold capable of improving the casting yield according to claim 1, wherein the two bent pipes (8) are respectively provided with a first valve (9), the two sealing cylinders (7) and the transfer bin (10) are respectively communicated with an elastic pipeline (13), the two elastic pipelines (13) and the transfer bin (10) are respectively provided with a second valve (12), and the two first valves (9) and the two second valves (12) are respectively one-way solenoid valves.

3. The casting mold capable of improving the casting yield according to claim 1, wherein the defoaming mechanism comprises a telescopic sleeve (11) communicated with the transfer bin (10), the telescopic sleeve (11) is vertically and upwardly installed, the telescopic sleeve (11) comprises an inner cylinder and an outer cylinder, the inner cylinder and the outer cylinder are in sealed sliding connection, a heat insulation plate (15) is fixedly supported on the inner cylinder of the telescopic sleeve (11), and two movable contacts (16) are symmetrically installed on the heat insulation plate (15).

4. The casting mold capable of improving the yield of castings according to claim 3, wherein the defoaming mechanism further comprises two supporting shells (22) symmetrically distributed below the casting trough body (4), a lower barrel (23) is placed in the two supporting shells (22), an upper barrel (27) is hermetically connected above the two lower barrels (23), the lower barrel (23) and the upper barrel (27) which correspond to each other in position jointly form a hollow sealed cylinder, two circular grooves are symmetrically formed in the bottom wall of the casting trough body (4), and the two upper barrels (27) are respectively located in the corresponding circular grooves and are in sealed sliding connection with the circular grooves.

5. The casting mold capable of improving the casting yield according to claim 4, wherein the bottom of each of the two lower barrels (23) is embedded with a static contact (24), the two static contacts (24) are respectively located right above the corresponding movable contacts (16), each of the two lower barrels (23) is provided with a time delay relay (25), and each of the two upper barrels (27) is provided with a vibration device (26).

6. The casting mold capable of improving the yield of castings according to claim 5, wherein the preheating mechanism comprises a heating device (18), a plurality of second springs (17) are symmetrically connected between the heating device (18) and the heat insulation plate (15), the heating device (18) comprises a heat conduction block (19), a heat conduction sheet (21) is fixedly mounted on the outer side wall of the casting groove body (4), and the position of the heat conduction block (19) corresponds to the position of the heat conduction sheet (21).

7. The casting mold capable of improving the casting yield according to claim 6, wherein the distance between the heat conducting block (19) and the heat conducting strip (21) is smaller than the distance between the movable contact (16) and the fixed contact (24), and a plurality of supporting frameworks (20) are symmetrically arranged between the casting groove body (4) and the base (6).