CN110722126A

CN110722126A - Die casting die that can fast demold of pure

Info

Publication number: CN110722126A
Application number: CN201910985480.4A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-01-24

Abstract

The invention discloses a flawless die-casting die capable of quickly demoulding, belonging to the technical field of die-casting dies, the flawless die-casting die capable of quickly demoulding is characterized in that a groove is arranged in a lower die, a baffle is arranged on the right side in the groove, a cavity is formed between the left side wall of the baffle and the left side wall of the groove, an elastic bag is arranged in the cavity, the right side of the elastic bag is attached to the baffle, a high temperature resistant layer is covered on the outer wall of the elastic bag, a metal wire framework is filled in the elastic bag, a water storage tank is arranged on the left side of the lower die, and the bottom end of the water storage tank is connected with a water pipe, so that the die-casting piece can be quickly demoulded, die-casting pieces with different sizes and shapes can be obtained by adjusting the deformation degree of the elastic bag according to needs, the production cost is effectively reduced, the water in the elastic bag has a cooling effect on the upper, the safety is improved, and the service life of the die-casting die is effectively prolonged.

Description

Die casting die that can fast demold of pure

Technical Field

The invention relates to the technical field of die-casting molds, in particular to a die-casting mold free of time and capable of being rapidly demolded.

Background

The die casting, or pressure casting, is a metal casting process, which is to press high-temperature liquid metal into a die cavity under high pressure, the structure of the die cavity is the same as that of a product to be formed, and after the liquid metal in the die cavity is cooled and solidified, the liquid metal is taken out to obtain a workpiece to be formed. The die-casting die is a method for casting liquid die forging, a process completed on a special die-casting die forging machine. The basic process comprises the following steps: molten metal is cast at low speed or high speed and filled into the cavity of the mold, the mold has movable cavity surface, and it is pressurized and forged along with the cooling process of the molten metal, so that the shrinkage cavity and shrinkage porosity defects of the blank are eliminated, and the internal structure of the blank reaches the broken crystal grains in the forged state. The comprehensive mechanical property of the blank is obviously improved.

The existing die-casting die has the following defects:

(1) the structure is complex, the heat conductivity and cooling effect are poor during working, and the thermal expansion is large, so that the service life is short;

(2) the cavity of a die-casting die is fixed, so that only one die-casting product can be correspondingly produced, and the production cost is high;

(3) when high-temperature and high-pressure gas is discharged in the die-casting process, sometimes molten metal and gas are discharged from the exhaust groove at the same time, and the high-temperature and high-pressure gas or the molten metal is directly discharged out of the die through the exhaust groove, so that workers are easily scalded;

(4) the existing material for preparing the die-casting die has low overall service life due to low thermal fatigue under high temperature.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a flawless die-casting die capable of rapidly demoulding, which can realize rapid demoulding of die-casting parts, can adjust the deformation degree of an elastic bag according to requirements to obtain die-casting parts with different sizes and shapes, effectively reduces the production cost, has a cooling effect on an upper die and a lower die by water in the elastic bag, is convenient to position and install, avoids the phenomenon of scalding caused by exhaust in the die-casting process, improves the safety, and effectively prolongs the service life of the die-casting die.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A pressure casting die capable of realizing rapid demolding without time, comprising a lower die and an upper die, wherein a groove is formed in the lower die, a baffle is arranged on the right side in the groove, a cavity is formed between the left side wall of the baffle and the left side wall of the groove, an elastic bag is arranged in the cavity, the right side of the elastic bag is attached to the baffle, a high temperature resistant layer covers the outer wall of the elastic bag, a metal wire framework is filled in the elastic bag, a water storage tank is arranged on the left side of the lower die, the bottom end of the water storage tank is connected with a water pipe, a water pump is further connected onto the water pipe, the tail end of the water pipe penetrates through the left side wall of the lower die to be communicated with the interior of the elastic bag, an obliquely arranged liquid injection hole is formed in the upper die, an exhaust groove is formed in the upper side of the upper die, the top of, the other end of the flow guide pipe is connected with a vertical pipe, the bottom end of the vertical pipe is connected with a collecting box, the top end of the left side of the collecting box is connected with an air outlet pipe, the other end of the air outlet pipe extends into the water storage box, and one end, located at the water storage box, of the air outlet pipe is provided with a one-way valve.

Furthermore, the high temperature resistant layer is made of elastic high temperature resistant materials, and the circumferential side wall of the baffle is coated with a high temperature resistant sealing layer, so that the contact sealing performance of the baffle and the groove is ensured.

Further, the right side of lower mould is equipped with first cylinder, the flexible end of first cylinder is connected with the connecting rod, the left end of connecting rod and the right side wall fixed connection of baffle, when the size of needs adjustment die cavity, the work of control first cylinder drives the baffle through the connecting rod and removes, can realize the regulation to the die cavity size, the not equidimension foundry goods of die-casting of being convenient for.

Further, the downside of lower mould is equipped with the second cylinder, and the flexible end of second cylinder is connected with the ejector pin, the ejector pin runs through the bottom of lower mould, the top of ejector pin flushes with the bottom of recess, sets up second cylinder and ejector pin, and after the foundry goods shaping was accomplished in die-casting, start the second cylinder and drive the ejector pin and rise, can be with inside the ejecting recess of shaping foundry goods, realized the quick drawing of patterns.

Furthermore, the locating hole has all been seted up to the four corners department of last mould, the constant head tank has all been seted up to the four corners department of lower mould, the locating hole with the constant head tank one-to-one sets up, every group the locating hole with the locating lever has all been pegged graft to the constant head tank inside, sets up the locating hole and the constant head tank that four groups correspond the setting, conveniently fixes a position last mould and lower mould, avoids last mould and lower mould to take place the aversion phenomenon.

Further, the mounting hole has all been seted up at both ends about on the mould, the mounting groove has all been seted up at both ends about on the lower mould, the mounting hole with the mounting groove one-to-one sets up, all be equipped with the internal thread on mounting hole and the mounting groove inner wall, every group equal spiro union has the screw rod in mounting hole and the mounting groove, sets up the mounting hole and the mounting groove that two sets of correspondence set up, and the convenience is installed the fastening to last mould and lower mould, avoids going up mould and lower mould and takes place not hard up the phenomenon.

Furthermore, water is injected into the collecting box, and the height of the injected water is half of that of the collecting box.

Furthermore, the outer walls of the exhaust pipe, the flow guide pipe, the vertical pipe and the air outlet pipe are wrapped by heat insulation material layers, so that scalding is avoided.

Furthermore, the lower die and the upper die are made of special materials for die-casting dies.

Further, the special material for the die-casting die comprises the following components in percentage by weight: 0.4 to 0.52 percent of C, 0.90 to 1.40 percent of Si, 0.30 to 0.55 percent of Mn, 4.65 to 5.25 percent of Cr, 1.60 to 2.10 percent of Mo, 0.9 to 1.4 percent of V, 0.35 to 0.55 percent of Co0.01 percent of S, 0 to 0.02 percent of P and the balance of Fe.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the die-casting parts with different sizes and shapes can be obtained by adjusting the deformation degree of the elastic bag according to the needs, so that the production cost is effectively reduced, and the use is convenient; and the water in the elastic bag has a cooling effect on the upper die and the lower die, so that the service life of the whole die is effectively prolonged.

(2) The periphery of the baffle is coated with a high-temperature-resistant sealing layer, so that the contact sealing performance of the baffle and the groove is ensured.

(3) When the size of the cavity needs to be adjusted, the first cylinder is controlled to work, the baffle is driven by the connecting rod to move left and right, the size of the cavity can be adjusted, and castings of different sizes can be die-cast conveniently.

(4) After the casting is finished and the casting is formed, the second cylinder is started to drive the ejector rod to ascend, the formed casting can be ejected out of the groove, and rapid demolding is achieved.

(5) Four groups of correspondingly arranged positioning holes and positioning grooves are arranged, so that the upper die and the lower die are conveniently positioned, and the upper die and the lower die are prevented from shifting; set up two sets of mounting holes and the mounting groove that corresponds the setting, the convenience is installed the fastening to last mould and lower mould, avoids last mould and lower mould to take place not hard up phenomenon.

(6) In the die casting process, high-temperature and high-pressure gas in the cavity is discharged from the exhaust groove, and the gas sequentially passes through the exhaust pipe, the flow guide pipe, the vertical pipe and the air outlet pipe and finally enters the water storage tank. The one-way valve enables the gas to be discharged from the air outlet pipe, and prevents the water in the water storage tank from entering the air outlet pipe. The water in the water storage tank can cool the gas, so that the condition that workers are scalded by high-temperature gas is effectively avoided, and the safety is improved.

(7) When the molten metal appears and along with gaseous entering blast pipe, the molten metal passes through inside honeycomb duct and the standpipe entering collecting box, and under the effect of gravity, the molten metal can drop and get into the inside aquatic of collecting box, and hydroenergy in the collecting box plays the cooling action to the molten metal to effectively avoid taking place the phenomenon that the workman was scalded to the molten metal, further improvement the security.

(8) The special material for preparing the die-casting die is added with Co, and the content of other components is correspondingly adjusted, so that the prepared die-casting die has very high strength at high temperature on the premise of not reducing the high-temperature toughness, the early-rise cracking phenomenon easily occurs in the existing material for preparing the die-casting die can be effectively solved, and the service life of the die-casting die can be effectively prolonged.

Drawings

Fig. 1 is a front view of the present invention.

The reference numbers in the figures illustrate:

1 lower die, 101 die cavities, 2 upper dies, 3 grooves, 4 elastic bags, 5 high-temperature resistant layers, 6 metal wire frameworks, 7 water storage tanks, 8 water pumps, 9 water pipes, 10 baffles, 11 connecting rods, 12 first cylinders, 13 ejector rods, 14 second cylinders, 15 positioning rods, 16 positioning holes, 17 positioning grooves, 18 screw rods, 19 mounting holes, 20 mounting grooves, 21 liquid injection holes, 22 exhaust grooves, 23 exhaust pipes, 24 flow guide pipes, 25 vertical pipes, 26 collecting boxes and 27 exhaust pipes.

Detailed Description

The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

the die-casting die comprises a lower die 1 and an upper die 2, a groove 3 is formed in the lower die 1, a baffle 10 is arranged on the right side of the inside of the groove 3, a cavity 101 is formed between the left side wall of the baffle 10 and the left side wall of the groove 3, an elastic bag 4 is arranged in the cavity 101, the right side of the elastic bag 4 is attached to the baffle 10, a high-temperature-resistant layer 5 covers the outer wall of the elastic bag 4, a metal wire framework 6 is filled in the elastic bag 4, a water storage tank 7 is arranged on the left side of the lower die 1, a water pipe 9 is connected to the bottom end of the water storage tank 7, a water pump 8 is further connected to the water pipe 9, the tail end of the water pipe 9 penetrates through the left side wall of the lower die 1 to be communicated with the inside of the;

when the die-casting die works, a sample piece is placed into the cavity 101, the water pump 8 is turned on, water is filled into the elastic bag 4, the elastic bag 4 is made to expand, the elastic bag 4 deforms and is tightly attached to the outer wall of the sample piece, then the sample piece is taken out, a working cavity for forming the sample piece is formed between the elastic bag 4 and the cavity 101, then the upper die 2 and the lower die 1 are matched, metal liquid is introduced from the liquid injection hole 21, and a die-casting component required for forming in the working cavity can be formed. The deformation degree of the elastic bag 4 can be adjusted according to the requirement to obtain die castings with different sizes and shapes, so that the production cost is effectively reduced, and the use is convenient; and the water in the elastic bag 4 has a cooling effect on the upper die 2 and the lower die 1, so that the service life of the whole die is effectively prolonged.

High temperature resistant layer 5 is made by elasticity high temperature resistant material, and the cladding has high temperature resistant sealing layer on the circumference lateral wall of baffle 10, guarantees the contact leakproofness of baffle 10 and recess 3.

The right side of lower mould 1 is equipped with first cylinder 12, and the flexible end of first cylinder 12 is connected with connecting rod 11, and the left end of connecting rod 11 and the right side wall fixed connection of baffle 10 when the size of needs adjustment die cavity 101, the work of control first cylinder 12, move about through connecting rod 11 drive baffle 10, can realize the regulation to the die cavity 101 size, the not casting of equidimension of die-casting of being convenient for.

The downside of lower mould 1 is equipped with second cylinder 14, and the flexible end of second cylinder 14 is connected with ejector pin 13, and ejector pin 13 runs through the bottom of lower mould 1, and the top of ejector pin 13 flushes with the bottom of recess 3, sets up second cylinder 14 and ejector pin 13, and after the casting shaping is ended in die-casting, start second cylinder 14 and drive ejector pin 13 and rise, can be with inside the ejecting recess 3 of shaping casting, realized quick drawing of patterns.

Go up the four corners department of mould 2 and all seted up locating hole 16, the constant head tank 17 has all been seted up to the four corners department of lower mould 1, and locating hole 16 sets up with constant head tank 17 one-to-one, and every group locating hole 16 and constant head tank 17 are inside all pegged graft to have the locating lever 15, set up four locating holes 16 and the constant head tank 17 that correspond the setting of group, conveniently fix a position last mould 2 and lower mould 1, avoid going up mould 2 and lower mould 1 and take place the aversion phenomenon.

Go up the mould 2 and all seted up mounting hole 19 at both ends about, mounting groove 20 has all been seted up at both ends about on the lower mould 1, mounting hole 19 and the setting of mounting groove 20 one-to-one, all be equipped with the internal thread on mounting hole 19 and the 20 inner walls of mounting groove, equal spiro union has screw rod 18 in every group mounting hole 19 and the mounting groove 20, set up mounting hole 19 and the mounting groove 20 that two sets of correspondence set up, the convenience is installed the fastening to last mould 2 and lower mould 1, avoid going up mould 2 and lower mould 1 and take place not hard up the phenomenon.

Go up the upside of mould 2 and seted up exhaust duct 22, the top of exhaust duct 22 is connected with blast pipe 23, the top of blast pipe 23 is connected with the honeycomb duct 24 that the slope set up, the other end of honeycomb duct 24 is connected with standpipe 25, the bottom of standpipe 25 is connected with collecting box 26, the left side top of collecting box 26 is connected with outlet duct 27, the other end of outlet duct 27 stretches into inside the water storage box 7, outlet duct 27 is located the one end of water storage box 7 and installs the check valve.

The water is injected into the collecting tank 26 at a height half that of the collecting tank 26.

In the die casting process, high-temperature and high-pressure gas in the cavity 101 is discharged from the exhaust groove 22, and the gas sequentially passes through the exhaust pipe 23, the flow guide pipe 24, the vertical pipe 25 and the air outlet pipe 27 and finally enters the water storage tank 7. The one-way valve allows air to escape from the outlet conduit 27 and prevents water in the reservoir 7 from entering the outlet conduit 27. The water in the water storage tank 7 can cool the gas, so that the condition that workers are scalded by high-temperature gas is effectively avoided, and the safety is improved.

When appearing molten metal along with gaseous admission blast pipe 23, inside molten metal passed through honeycomb duct 24 and standpipe 25 entering collecting box 26, under the effect of gravity, molten metal can drop and get into the inside aquatic of collecting box 26, and hydroenergy in the collecting box 26 plays the cooling action to molten metal to effectively avoid taking place molten metal and scald workman's phenomenon, further improvement the security.

The outer walls of the exhaust pipe 23, the guide pipe 24, the vertical pipe 25 and the exhaust pipe 27 are all wrapped with heat insulation material layers, so that scalding is avoided.

The lower die 1 and the upper die 2 are made of special materials for die-casting dies, and the special materials for the die-casting dies comprise the following components in percentage: 0.4 to 0.52 percent of C, 0.90 to 1.40 percent of Si, 0.30 to 0.55 percent of Mn, 4.65 to 5.25 percent of Cr, 1.60 to 2.10 percent of Mo1, 0.9 to 1.4 percent of V, 0.35 to 0.55 percent of Co, 0 to 0.01 percent of S, 0 to 0.02 percent of P and the balance of Fe.

The special material for preparing the die-casting die is added with Co, and the content of other components is correspondingly adjusted, so that the prepared die-casting die has very high strength at high temperature on the premise of not reducing the high-temperature toughness, the early-rise cracking phenomenon easily occurs in the existing material for preparing the die-casting die can be effectively solved, and the service life of the die-casting die can be effectively prolonged.

The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.

Claims

1. The utility model provides a die casting die that can fast release from mould of pure, includes lower mould (1) and mould (2), its characterized in that: the improved water injection mold is characterized in that a groove (3) is formed in the lower mold (1), a baffle (10) is arranged on the right side of the interior of the groove (3), a cavity (101) is formed between the left side wall of the baffle (10) and the left side wall of the groove (3), an elastic bag (4) is arranged in the cavity (101), a right side laminating baffle (10) of the elastic bag (4) is arranged, a high temperature resistant layer (5) covers the outer wall of the elastic bag (4), a metal wire framework (6) is filled in the elastic bag (4), a water storage tank (7) is arranged on the left side of the lower mold (1), a water pipe (9) is connected to the bottom end of the water storage tank (7), a water pump (8) is further connected to the water pipe (9), the tail end of the water pipe (9) penetrates through the left side wall of the lower mold (1) to be communicated with the interior of the elastic bag (4), and an obliquely arranged liquid injection, go up the upside of mould (2) and seted up air discharge duct (22), the top of air discharge duct (22) is connected with blast pipe (23), the top of blast pipe (23) is connected with honeycomb duct (24) that the slope set up, the other end of honeycomb duct (24) is connected with standpipe (25), and the bottom of standpipe (25) is connected with collecting box (26), and the left side top of collecting box (26) is connected with outlet duct (27), inside the other end of outlet duct (27) stretched into water storage box (7), the check valve was installed to the one end that outlet duct (27) were located water storage box (7).

2. The die casting mold of claim 1, wherein: the high-temperature resistant layer (5) is made of elastic high-temperature resistant materials, and the circumferential side wall of the baffle (10) is coated with a high-temperature resistant sealing layer.

3. The die casting mold of claim 1, wherein: the right side of lower mould (1) is equipped with first cylinder (12), the flexible end of first cylinder (12) is connected with connecting rod (11), the left end of connecting rod (11) and the right side wall fixed connection of baffle (10).

4. The die casting mold of claim 1, wherein: the downside of lower mould (1) is equipped with second cylinder (14), and the flexible end of second cylinder (14) is connected with ejector pin (13), ejector pin (13) run through the bottom of lower mould (1), the top of ejector pin (13) flushes with the bottom of recess (3).

5. The die casting mold of claim 1, wherein: locating holes (16) are formed in four corners of the upper die (2), locating grooves (17) are formed in four corners of the lower die (1), the locating holes (16) and the locating grooves (17) are arranged in a one-to-one correspondence mode, and locating rods (15) are inserted into the locating holes (16) and the locating grooves (17) in each group.

6. The die casting mold of claim 1, wherein: go up mould (2) and go up the left and right sides both ends and all seted up mounting hole (19), mounting groove (20) have all been seted up at the left and right sides both ends on lower mould (1), mounting hole (19) with mounting groove (20) one-to-one sets up, all be equipped with the internal thread on mounting hole (19) and mounting groove (20) inner wall, every group equal spiro union has screw rod (18) in mounting hole (19) and mounting groove (20).

7. The die casting mold of claim 1, wherein: the water is injected into the collecting box (26), and the height of the injected water is half of that of the collecting box (26).

8. The die casting mold of claim 1, wherein: and the outer walls of the exhaust pipe (23), the guide pipe (24), the vertical pipe (25) and the air outlet pipe (27) are all wrapped with heat insulation material layers.

9. The die casting mold of claim 1, wherein: the lower die (1) and the upper die (2) are made of special materials for die-casting dies.

10. The flawless die casting mold capable of rapid die release according to claim 9, wherein: the special material for the die-casting die comprises the following components in percentage by weight: 0.4 to 0.52 percent of C, 0.90 to 1.40 percent of Si, 0.30 to 0.55 percent of Mn, 4.65 to 5.25 percent of Cr, 1.60 to 2.10 percent of Mo, 0.9 to 1.4 percent of V, 0.35 to 0.55 percent of Co, 0 to 0.01 percent of S, 0 to 0.02 percent of P0 and the balance of Fe.