CN110216241B - High-efficient golden die casting mould - Google Patents
High-efficient golden die casting mould Download PDFInfo
- Publication number
- CN110216241B CN110216241B CN201910481288.1A CN201910481288A CN110216241B CN 110216241 B CN110216241 B CN 110216241B CN 201910481288 A CN201910481288 A CN 201910481288A CN 110216241 B CN110216241 B CN 110216241B
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- ejector plate
- runner
- riser
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- 238000004512 die casting Methods 0.000 title claims description 4
- 238000005266 casting Methods 0.000 claims abstract description 49
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 46
- 238000007667 floating Methods 0.000 claims description 38
- 229910052742 iron Inorganic materials 0.000 claims description 23
- 238000005452 bending Methods 0.000 claims description 15
- 239000000919 ceramic Substances 0.000 claims description 11
- 235000010627 Phaseolus vulgaris Nutrition 0.000 claims description 10
- 244000046052 Phaseolus vulgaris Species 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 18
- 238000005520 cutting process Methods 0.000 abstract description 2
- 239000000498 cooling water Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 8
- 238000003754 machining Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- QZLJNVMRJXHARQ-UHFFFAOYSA-N [Zr].[Cr].[Cu] Chemical compound [Zr].[Cr].[Cu] QZLJNVMRJXHARQ-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000007920 subcutaneous administration Methods 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/067—Venting means for moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/20—Stack moulds, i.e. arrangement of multiple moulds or flasks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
- B22D29/04—Handling or stripping castings or ingots
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a high-efficiency golden casting die which comprises a movable die and a fixed die which are oppositely arranged, wherein a vertical runner, a horizontal runner, a plurality of product cavities and riser cavities are formed between the movable die and the fixed die, the upper end of each product cavity is communicated with the riser cavity through a breakable slot forming part, the lower end of each product cavity is respectively communicated with the horizontal runner through a breakable inlet, the upper end of the vertical runner is communicated with a pouring cup, the lower end of each vertical runner is communicated with the horizontal runner, an ejection mechanism is arranged on the outer side wall of the movable die and comprises a runner ejector plate fixed with a plurality of runner ejector pins, a riser ejector plate fixed with a plurality of riser pins and a product ejector plate fixed with a plurality of product ejector pins, a plurality of penetrating ejector pin holes are formed in the movable die, each ejector pin is inserted into the ejector pin holes and does not extend out of the ejector pin holes, and a reset structure is arranged between each ejector pin plate and the movable die. The invention can realize the sequential ejection of the pouring gate, the feeding head and the product during the die opening, thereby eliminating the need of manually cutting off the pouring gate and the feeding head, improving the production efficiency and reducing the production cost.
Description
Technical Field
The invention relates to the technical field of dies, in particular to a high-efficiency gold mold casting die.
Background
In the existing cast iron (such as gray cast iron and spheroidal graphite cast iron) industry, metal mold (abbreviated as golden mold) casting and sand mold casting are the most common two casting forming modes, and the two modes are suitable for batch production of iron product blanks. However, as the national management and control on environmental protection and energy conservation are more and more strict, the problems of large dust, more equipment, large noise and the like in sand casting become more remarkable. In contrast, the use of metal-type moulds in the foundry industry has again demonstrated its advantages, for example: raw materials such as molding sand, bentonite and the like are not purchased and stored; no sand handling equipment procurement and maintenance; the casting is produced without sand cleaning, so that dust cannot be generated to pollute the environment; the reduction in equipment means that there is also a reduction in power requirements.
However, as shown in fig. 1, the existing golden casting mold adopts a single ejector plate, and the pouring gate (including the vertical pouring gate and the horizontal pouring gate), the product 26 and the feeding head 27 are ejected together during mold opening, and after cooling, the pouring gate and the feeding head 27 need to be manually cut off, so that independent products are obtained, and a specific post needs to be set to correspond to the cutting work of the pouring gate/feeding head, thereby not only reducing the production efficiency, but also increasing the production cost.
Disclosure of Invention
The invention aims to provide a high-efficiency golden casting die for solving the problems in the background technology.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a high-efficient golden die casting mould, includes movable mould and the cover half that set up relatively, be formed with vertical runner, cross gate and a plurality of product die cavity and riser die cavity between movable mould and the cover half, each the upper end and the riser die cavity intercommunication that corresponds of product die cavity, the lower extreme respectively with the cross gate intercommunication, the upper end intercommunication of vertical runner has the pouring cup, lower extreme and cross gate intercommunication, be equipped with the breakable groove formation portion between product die cavity and the riser die cavity, be equipped with the easily gate that breaks between product die cavity and the cross gate, be equipped with ejection mechanism on the lateral wall of movable mould, ejection mechanism includes runner ejector pin plate, riser ejector pin plate and the product ejector pin plate that sets gradually along the direction of motion of movable mould when the compound die, be fixed with the runner thimble that a plurality of root are relative with the cross gate on the runner ejector pin plate, be fixed with a plurality of root relative with each riser die cavity on the riser pin plate, be equipped with a plurality of thimble holes that run through on the movable mould, thimble pin and product pin plate and the product pin hole do not stretch out between riser pin and the movable mould ejector pin plate and the product ejector pin plate.
Further, both sides of the frangible groove forming part are pointed protrusions.
Further, the reset structure comprises a runner ejector plate return needle, a riser ejector plate return needle, a product ejector plate return needle and a plurality of penetrating return needle holes arranged on the movable mould, wherein respective first ends of the runner ejector plate return needle, the riser ejector plate return needle and the product ejector plate return needle are fixedly connected with the corresponding runner ejector plate, riser ejector plate and product ejector plate respectively, and respective second ends are flush with the inner side end face of the movable mould after being inserted into the return needle holes.
Further, a fixed mold core and a floating mold core are arranged in the product cavity, the fixed mold core is fixed on the movable mold, the floating mold core is arranged on the fixed mold, an elastic piece is arranged between the floating mold core and the fixed mold, and the elastic piece enables the end faces of the fixed mold core and the floating mold core to be always attached under a mold closing state.
Further, a central exhaust hole is formed in the floating mold core, the central exhaust hole is communicated with end faces of two sides of the floating mold core, a plurality of exhaust grooves are formed in the end face, close to the floating mold core, of the fixed mold core, two ends of each exhaust groove are respectively communicated with the center and the edge of the end face of the fixed mold core, and in a mold closing state, each exhaust groove is communicated with the central exhaust hole to form an exhaust channel.
Further, the both sides of pouring cup are equipped with the iron bean protection cover respectively, the iron bean protection cover includes the mainboard and two bending plates of setting in the mainboard both sides that the level set up, bending plate bending downwards, mainboard and two bending plate integrated into one piece are located the outside extension of bending plate level of movable mould top forms the fixed plate, the fixed plate passes through bolted connection and fixes on the movable mould.
Further, the inner wall of the pouring cup and the runner are detachably inlaid with ceramic inserts.
Further, a plurality of thermocouple mounting holes are formed in the fixed die, thermocouples are mounted in the thermocouple mounting holes, and each thermocouple is electrically connected to the intelligent temperature controller.
Further, the moving die and the fixed die are both provided with cooling waterways.
Further, the guide positioning structure comprises a guide post arranged on the inner side end surface of the movable die and a guide sleeve arranged on the inner side end surface of the fixed die, and the guide post and the guide sleeve are oppositely arranged.
The beneficial effects are that: according to the invention, by arranging the three-section type ejection mechanism, pouring gate, feeding head and products are sequentially ejected during die opening, after three ejection actions are completed, the die is emptied, castings are separated, then die assembly can be started, and in the die assembly process, the reset mechanism resets each ejector pin plate to carry out next die production. Compared with the existing die, the invention does not need to manually cut off the pouring gate and the feeding head, thereby improving the production efficiency and reducing the production cost.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a diagram showing the state of mold opening of a conventional metal mold;
FIG. 2 is a schematic perspective view of the present invention;
FIG. 3 is a front view of the present invention;
FIG. 4 is a top view of the present invention;
FIG. 5 is a mold opening state diagram of the present invention;
FIG. 6 is a schematic view showing the internal structure of the present invention when it is mounted on a casting machine;
FIG. 7 is a schematic view of the internal structure of the present invention;
FIG. 8 is a schematic view showing the states of the fixed mold core and the floating mold core when the mold is opened;
FIG. 9 is a schematic view showing the states of the fixed mold core and the floating mold core when the mold is closed;
FIG. 10 is an end view of a stationary mold core of the present invention;
FIG. 11 is a schematic view of a protecting cover for beans according to the present invention;
FIG. 12 is an enlarged schematic view of another view at A in FIG. 2 according to the present invention;
FIG. 13 is a schematic view showing the connection of the vent hole to the hexagonal steel rod according to the present invention;
FIG. 14 is a state diagram of the guide positioning structure of the present invention in a clamped state;
fig. 15 is a state diagram of the guide positioning structure when the present invention is in the mold-opened state.
Detailed Description
Referring to fig. 2 to 7, the invention relates to a high-efficiency gold mold casting mold, which comprises a movable mold 1 and a fixed mold 2 which are oppositely arranged, wherein a vertical runner 3, a horizontal runner 4, a plurality of product cavities 5 and riser cavities 6 are formed between the movable mold 1 and the fixed mold 2, the upper end of each product cavity 5 is communicated with the corresponding riser cavity 6, the lower end of each product cavity is respectively communicated with the horizontal runner 4, a pouring cup 7 is communicated with the upper end of the vertical runner 3, the lower end of each pouring cup is communicated with the horizontal runner 4, the pouring cup 7 is formed by a pouring gate block 71 arranged on the top of the movable mold 1 and the top of the fixed mold 2, a breakable slot forming part 8 is arranged between the product cavities 5 and the riser cavities 6, a breakable inlet gate 9 is arranged between the product cavities 5 and the horizontal runner 4, an ejector pin plate 11 and a product ejector pin 12 are sequentially arranged along the moving direction of the movable mold 1, a plurality of runner pins 13 are fixed on the ejector plate 10, a plurality of pin pins 13 opposite to the horizontal runner 4 are fixed on the ejector plate 10, a plurality of pin pins 14 are fixed on the ejector pin plate 11, a plurality of product pins 14 are fixed on the ejector pin plate 11 opposite to the ejector pin plate 6, a plurality of product pins 15 are arranged between the movable mold 1 and the product pins 15 are inserted between the movable mold 1 and the product pin 13.
Preferably, both sides of the frangible groove forming part 8 are pointed protrusions, and the distance between the pointed protrusions on both sides is preferably 3.5-6 mm, which is determined according to the size of the product. After casting, the product cavity 5 and the riser cavity 6 respectively form a product 26 and a feeding head 27, and the connection part of the product 26 and the feeding head 27 is provided with frangible grooves on two sides through the frangible groove forming part 8, so that the connection part of the product 26 and the feeding head 27 is propped up to break when the riser thimble 14 ejects the feeding head 27, and the feeding head 27 is ejected out. Similarly, the thickness of the cross section of the breakable inlet 9 is designed to be 3.5-6 mm, which is also dependent on the size of the product, so as to eject the runner (including the sprue 3 and runner 4).
Preferably, the reset structure comprises a runner ejector plate return needle 16, a riser ejector plate return needle 17, a product ejector plate return needle 18 and a plurality of penetrating return needle holes arranged on the movable mould 1, wherein first ends of the runner ejector plate return needle 16, the riser ejector plate return needle 17 and the product ejector plate return needle 18 are fixedly connected with the runner ejector plate 10, the riser ejector plate 11 and the product ejector plate 12 respectively, and second ends of the runner ejector plate return needle 16, the riser ejector plate return needle 17 and the product ejector plate return needle 18 are flush with the inner end face of the movable mould 1 after being inserted into the return needle holes. After completing a complete ejection process, the mold is closed to produce the next mold, at this time, the runner ejector plate return pin 16, the riser ejector plate return pin 17 and the product ejector plate return pin 18 are sequentially abutted against the inner side end surface of the fixed mold 2, and the runner ejector plate 10, the riser ejector plate 11 and the product ejector plate 12 are sequentially reset under the action of the return pins.
Referring to fig. 6, the mold is used in cooperation with a casting machine, the movable mold 1 and the fixed mold 2 are fixed on the casting machine through a movable mold fixing plate 28 and a fixed mold fixing plate 29 respectively, the movable mold fixing plate 28 and the fixed mold fixing plate 29 are parts on the casting machine, the movable mold fixing plate 28 can slide back and forth under the action of an oil cylinder, the fixed mold fixing plate 29 is not movable, a top rod 30 opposite to the movable mold 1 is further arranged on the casting machine, and the top rod 30 is abutted with a runner top needle plate 10 in the process of retreating the movable mold 1. Further, since the ejector mechanism is provided on the movable die 1, the product 26, the runner, and the feeding head 27 are designed to be buckled on the side of the movable die 1 with the ejector mechanism, so that the draft angle of the product 26 is designed to be 0 to 0.5 °. The working process of the die is as follows:
1. after casting and cooling (at 800-900 ℃), the mold is opened, and the product 26, the pouring gate and the feeding head 27 are buckled on the movable mold 1 to retract with the movable mold 1.
2. When the movable die 1 retreats, the runner ejector plate 10 will first contact the ejector pins 30 fixed on the casting machine, and at this time, the runner ejector pins 13 extend out of the ejector pin holes and eject the runner, which drops due to the ejection of the junction with the product 26.
3. The movable mould 1 continues to retreat, at this time, because the travel distance between the runner ejector plate 10 and the riser ejector plate 11 is already finished, the acting force of the ejector rod 30 is applied to the riser ejector plate 11 through the runner ejector plate 10, the riser ejector 14 stretches out of the ejector pin hole and ejects the feeding head 27, and the feeding head 27 falls off due to the fact that the joint of the feeding head 27 and the product 26 is broken by ejection.
4. The first two ejection actions are to eject the runner and the feeding head 27 respectively, but the product 26 is still buckled on the movable die 1 under the action of friction force generated by a die-off angle of 0-0.5 degrees, at this time, the movable die 1 is retreated again, the acting force of the ejection rod 30 is indirectly applied to the product ejector plate 12, and the product 15 is ejected through the product ejector pins 15 symmetrically designed relative to the appearance of the product 26 (the purpose of symmetrical design is to ensure that the stress balance is ensured under the condition that the inner hole and the outer diameter of the product 15 are at the die-off angle of 0-0.5 degrees).
5. After the three ejection actions are completed, the mold is emptied and the castings are separated, then the mold closing is started, and under the action of each return needle, the runner ejector plate 10, the riser ejector plate 11 and the product ejector plate 12 are reset in sequence, and the next mold production is started.
The three-section ejection mechanism is arranged in the mold, so that the runner, the feeding head 27 and the product 26 are sequentially ejected when the mold is opened, after three ejection actions are completed, the mold is emptied, the castings are separated, then the mold can be closed, and the reset mechanism resets each ejector plate in the mold closing process so as to carry out next mold production. Compared with the existing die, the die does not need to manually cut off the pouring gate and the feeding head 27, so that the production efficiency is improved, and the production cost is reduced.
As a preferable aspect of the present invention, referring to fig. 7, a fixed mold core 19 and a floating mold core 20 are provided in the product cavity 5, the fixed mold core 19 is fixed on the movable mold 1, the floating mold core 20 is mounted on the fixed mold 2, an elastic member 21 is provided between the floating mold core 20 and the fixed mold 2, and the elastic member 21 enables the end surfaces of the fixed mold core 19 and the floating mold core 20 to be always adhered in a mold clamping state. Therefore, the tightness of the mold core position is ensured, the quality of the central hole position of the casting is ensured, and the service life of the mold is prolonged. The floating mold core 20 includes a floating mold core body 201 and a fixed column 202, a first end of the fixed column is connected with a center of the floating mold core body 201, and a second end of the fixed column 202 penetrates through the fixed mold 2 and is connected with an outer side wall of the fixed mold 2. Preferably, the fixed column 202 is a bolt, a screw rod of the bolt is in threaded connection with the floating mold core body 201, and the head of the bolt abuts against the outer side wall of the fixed mold 2 to play a limiting role. Preferably, both the floating core body 201 and the fixed core 19 are made of a wear-resistant, high temperature-resistant, thermally conductive material (e.g., chromium zirconium copper). The fixed die 2 is provided with an elastic piece placing groove for installing the elastic piece 21, the elastic piece 21 is a spring, preferably a high-temperature-resistant spring, the spring is sleeved on the fixed column 202, and two ends of the spring are respectively abutted with the end face of the floating die core body 201 and the end face of the elastic piece placing groove. Preferably, in the free state, the end of the spring extends out of the spring receiving groove by a length of 3mm, and a floating stroke of 3mm is opened by the spring force.
In addition, referring to fig. 8 to 10, the floating mold core 20 is provided with a central vent hole, specifically, the central vent hole includes a hole 2011 formed on an end surface of the floating mold core body 201 near the fixed mold core 19 and a through hole 2021 formed inside the fixed column 202, the central vent hole is communicated with two side end surfaces of the floating mold core 20, the end surface of the fixed mold core 19 near the floating mold core 20 is provided with a plurality of vent grooves 191, two ends of each vent groove 191 are respectively communicated with a center and an edge of the end surface of the fixed mold core 19, and in a mold closing state, each vent groove 191 is communicated with the central vent hole to form a vent passage. The exhaust passage is matched with external equipment to exhaust the exhaust gas and guide cooling gas. Preferably, the width of the air discharge groove 191 is 3 to 5mm and the depth is 0.1 to 0.2mm. Specifically, in the actual production process of the metal mold, because the annular product is easy to trap gas in the inner hole site (the gas source comprises air, water vapor, hydrogen, nitrogen and the like generated by aluminum element during molten iron smelting), if the annular product is trapped gas, the quality defects such as air holes, pinholes and the like can be directly generated on the surface or under the skin of the product. Therefore, the air exhaust groove 191 is designed on the end surface of the fixed mold core 19, and the air exhaust groove 191 is communicated with the central air exhaust hole of the floating mold core 20 in the mold closing state, so that the air accumulated around the mold core can be actively pumped out by an air pumping tool on the casting machine in the period from the beginning of casting molten iron (the temperature of the molten iron is 1300-1400 ℃) to the end of casting the molten iron, and the purpose of eliminating air holes of products is achieved.
Because the fixed mold core 19 and the floating mold core 20 are wrapped in the center of the casting, the temperature is higher, so that the fixed mold core 19 and the floating mold core 20 can be rapidly cooled, and the air extraction tool can realize the purpose of air blowing cooling. The method comprises the following steps: after casting, the surface of the casting begins to harden (the casting temperature is about 1000 ℃) under the cooling effect of cooling water. In this case, the suction is switched to the blowing line by means of a reversing valve provided on the casting machine. Cold air (e.g., compressed air, nitrogen, etc.) provided by the peripheral devices is blown from the central vent holes of the floating core 20 into the central hole site of the product, thereby forcing the fixed core 19 and the floating core 20 to cool down rapidly. Meanwhile, because the fixed mold core 19 and the floating mold core body 201 are made of wear-resistant high-temperature-resistant heat-conducting materials, the volumes of the fixed mold core 19 and the floating mold core body 201 can be rapidly contracted at the moment according to the principle of thermal expansion and contraction, and the size of an inner hole of a product is increased, so that a demolding gap is formed between the product and the mold core, and therefore, the mold can be normally demolded even under the condition that the demolding angle of the mold core is designed to be small (such as 0-0.5 ℃). Meanwhile, compared with 2-3 mm machining allowance in the prior art, the invention provides a technology for eliminating subcutaneous air holes after the matching of the technical scheme of a demoulding angle of 0-0.5 degrees, the machining allowance of the outer surface and the inner hole of a product can be designed to be about 0.5mm, the utilization rate of molten iron is improved, the weight of the sand mould casting of 0.5mm is reduced by 6-12% compared with that of the sand mould casting of the prior art, the machining procedures for machining the inner surface and the outer surface of a rough lathe can be reduced during the subsequent mechanical addition, and one machine tool and one worker can be saved in one production line; the demoulding angle of 0-0.5 degrees reduces the machining allowance of the inner hole of the casting in the later mechanical processing and greatly reduces the production cost of casting and mechanical processing.
As one preferable aspect of the present invention, two sides of the pouring cup 7 are respectively provided with the iron bean protection cover 22, referring to fig. 11, the iron bean protection cover 22 includes a main board 221 horizontally arranged and two bending boards 222 arranged at two sides of the main board 221, the bending boards 222 are bent downwards, the main board 221 and the two bending boards 222 are integrally formed, the bending boards 222 above the movable mold 1 horizontally extend outwards to form a fixing board 223, and the fixing board 223 is fixed on the movable mold 1 through a bolt connection. By arranging the iron bean protection covers 22 on the two sides of the pouring cup 7, a small amount of molten iron splashed when molten iron is poured into the pouring cup 7 is prevented from being cooled on the surface of the die to form iron beans, defective products caused by the fact that the iron beans fall into the product cavity 5 during die assembly are avoided, and the situation that a cutter is broken due to the fact that the defective products flow into a machining area and the situation that production is influenced due to overflow of the pouring cup 7 are avoided. Preferably, referring to fig. 12, a gap, preferably 1mm, is left between the lowest point of the bending plate 222 located above the fixed mold 2 and the top of the fixed mold 2. Thus, when the mold is normally opened and closed, the bending plate 222 above the fixed mold 2 scrapes off some slag generated during casting with the movement of the movable mold 1. The main board 221 is provided with an observation window 224, and the observation window 224 is made of toughened glass. Specifically, the main board 221 is provided with a through hole having a stepped inner wall, and the observation window 224 is mounted on the through hole. Because each product die cavity 5 all communicates to the top of movable mould 1 and cover half 2 through the rising head die cavity 6 that sets up above it, consequently observe window 224 not only can prevent that the molten iron of spill from falling into rising head die cavity 6 and entering into product die cavity 5, can also play the condition of being convenient for observe molten iron casting, be favorable to the staff to judge whether molten iron casting is in place.
As a preferable mode of the invention, the inner wall of the pouring cup 7 and the runner 4 are detachably embedded with ceramic inserts, namely, the ceramic inserts are arranged at easy-to-burn positions such as molten iron direct flushing positions, corner positions which are easy to form hot joints due to heat accumulation, and the like, so that the pouring cup 7 and the runner 4 are prevented from being burnt, when the ceramic inserts are burnt, the ceramic inserts are directly replaced, the whole mould is not required to be maintained or replaced, and the production cost is greatly saved and the production efficiency is improved. Preferably, the ceramic insert is made of aluminum nitride ceramic. The aluminum nitride ceramic with good heat resistance is beneficial to prolonging the service life of the ceramic insert, thereby saving the time for replacing the ceramic insert and being beneficial to improving the production efficiency.
As a preferred aspect of the present invention, referring to fig. 3, in order to enable better gas discharge in the product cavity 5 at the time of molten iron casting, a plurality of vent holes 31 are provided at an upper portion of an end surface of the product cavity 5, preferably, vent holes 31 are provided at the fixed mold 2, and in this embodiment, the number of the product cavities 5 is 4, wherein the number of vent holes 31 on two product cavities 5 distant from the sprue 3 is 3, and the number of vent holes 31 on two product cavities 5 close to the sprue 3 is 5. Referring to fig. 13, since the temperature of molten iron is high, a general vent plug cannot be directly applied, so that the vent hole 31 adopts a mode of matching a hexagonal steel bar 32 with a round hole, that is, the vent hole 31 is a round hole, the hexagonal steel bar 32 is arranged in the vent hole 31, six edges of the hexagonal steel bar 32 are respectively abutted with the inner wall of the vent hole 31, and a vent gap 33 is formed between the vent hole 31 and the prismatic surface of the hexagonal steel bar 32. The method is simple and easy to process, convenient to maintain and good in exhaust. Preferably, the exhaust gap 33 is 0.1 to 0.2mm.
As a preferred embodiment of the present invention, referring to fig. 3, a plurality of thermocouple mounting holes 23 are provided on the stationary mold 2, and thermocouples are installed in the thermocouple mounting holes 23, each thermocouple being electrically connected to the intelligent thermostat. Simultaneously, all be equipped with cooling water route 24 on movable mould 1 and the cover half 3, cooling water route 24 includes the cooling water branch road that two intervals set up, and the both ends of cooling water branch road are connected with the water pipe respectively, and the cooling water is opened by mould cooling water control system control and is stopped. Specifically, the thermocouple detects the temperature of the center of the die in real time, the detected die temperature is timely fed back to the intelligent temperature controller, the intelligent temperature controller compares the set value with the feedback value, when the feedback value is higher than the set value, the intelligent temperature controller sends an opening signal to a die cooling water control system, and the system controls a water valve to open, so that cooling water flows into a cooling water channel 24 to reduce the die temperature; when the temperature of the mold is lower than the set value, the mold cooling water control system controls the water valve to be closed. Wherein, a plurality of thermocouples are arranged to obtain an average value of a plurality of detection values, so that the detection result is more accurate.
As a preferred embodiment of the present invention, referring to fig. 14 and 15, the present mold further includes a guide positioning structure including a guide post 251 provided on an inner side end surface of the movable mold 1 and a guide sleeve 252 provided on an inner side end surface of the fixed mold 2, the guide post 251 and the guide sleeve 252 being disposed opposite to each other. After the die is mounted on a relatively fixed position on the casting machine, the die needs to be precisely positioned to ensure that the position of each die opening and closing is unchanged, so that the produced product is free from die errors and deformation.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
Claims (8)
1. The utility model provides a high-efficient golden die casting mould, includes movable mould (1) and cover half (2) that set up relatively, be formed with between movable mould (1) and cover half (2) and erect and water (3), cross gate (4) and a plurality of product die cavity (5) and riser die cavity (6), each the upper end and the riser die cavity (6) intercommunication that correspond of product die cavity (5), the lower extreme communicates with cross gate (4) respectively, the upper end intercommunication of erecting water (3) has pouring basin (7), lower extreme and cross gate (4) intercommunication, its characterized in that: the utility model discloses a cooling system for casting a casting mould, which comprises a movable mould (1), and is characterized in that a frangible groove forming part (8) is arranged between a product cavity (5) and a riser cavity (6), a frangible inlet gate (9) is arranged between the product cavity (5) and a cross gate (4), an ejection mechanism is arranged on the outer side wall of the movable mould (1), the ejection mechanism comprises a runner ejector plate (10), a riser ejector plate (11) and a product ejector plate (12) which are sequentially arranged along the moving direction of the movable mould (1) during mould closing, a plurality of runner ejector pins (13) which are opposite to the cross gate (4) are fixed on the runner ejector plate (10), a plurality of riser pins (14) which are opposite to the riser cavities (6) are fixed on the riser ejector plate (11), a plurality of product ejector pins (15) which are opposite to the product cavity (5) are fixed on the product ejector plate (12), a plurality of penetrating ejector pins (13), riser pins (14) and product ejector pins (15) are inserted into ejector pins without extending out of ejector pins holes are arranged on the movable mould (1), a cooling system for casting a casting mould (382) is arranged between the runner ejector plate (10), the runner ejector plate (11) and the runner ejector plate (12) and the movable mould (1), the guiding and positioning structure comprises a guide post (251) arranged on the inner side end surface of the movable die (1) and a guide sleeve (252) arranged on the inner side end surface of the fixed die (2), wherein the guide post (251) and the guide sleeve (252) are oppositely arranged.
2. The high-efficiency golden casting mold of claim 1, wherein: both sides of the frangible groove forming part (8) are pointed bulges.
3. The high-efficiency golden casting mold of claim 1, wherein: the reset structure comprises a runner ejector plate return needle (16), a riser ejector plate return needle (17), a product ejector plate return needle (18) and a plurality of through return needle holes arranged on the movable mould (1), wherein the respective first ends of the runner ejector plate return needle (16), the riser ejector plate return needle (17) and the product ejector plate return needle (18) are respectively fixedly connected with the corresponding runner ejector plate (10), the riser ejector plate (11) and the product ejector plate (12), and the respective second ends are inserted into the return needle holes and then are flush with the inner side end faces of the movable mould (1).
4. The high-efficiency golden casting mold of claim 1, wherein: the novel mold is characterized in that a fixed mold core (19) and a floating mold core (20) are arranged in the product cavity (5), the fixed mold core (19) is fixed on the movable mold (1), the floating mold core (20) is arranged on the fixed mold (2), an elastic piece (21) is arranged between the floating mold core (20) and the fixed mold (2), and the elastic piece (21) enables the end faces of the fixed mold core (19) and the floating mold core (20) to be always attached under a mold closing state.
5. The high-efficiency golden casting mold of claim 4 wherein: the floating mold core (20) is provided with a central exhaust hole, the central exhaust holes are communicated with the end faces of the two sides of the floating mold core (20), the end face, close to the floating mold core (20), of the fixed mold core (19) is provided with a plurality of exhaust grooves (191), the two ends of each exhaust groove (191) are respectively communicated with the center and the edge of the end face of the fixed mold core (19), and in a mold closing state, each exhaust groove (191) is communicated with the central exhaust hole to form an exhaust channel.
6. The high-efficiency golden casting mold of claim 1, wherein: the pouring cup is characterized in that iron bean protection covers (22) are respectively arranged on two sides of the pouring cup (7), each iron bean protection cover (22) comprises a main board and two bending boards arranged on two sides of the main board, each bending board is bent downwards, the main board and the two bending boards are integrally formed, the bending boards above the movable die (1) horizontally extend outwards to form fixing boards, and the fixing boards are fixed on the movable die (1) through bolt connection.
7. The high-efficiency golden casting mold of claim 1, wherein: the ceramic insert is detachably inlaid in the inner wall of the pouring cup (7) and the runner (4).
8. The high-efficiency golden casting mold of claim 1, wherein: the fixed die (2) is provided with a plurality of thermocouple mounting holes (23), thermocouples are mounted in the thermocouple mounting holes (23), and each thermocouple is electrically connected to the intelligent temperature controller.
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| CN201910481288.1A CN110216241B (en) | 2019-06-04 | 2019-06-04 | High-efficient golden die casting mould |
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| CN201910481288.1A CN110216241B (en) | 2019-06-04 | 2019-06-04 | High-efficient golden die casting mould |
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| CN114367647B (en) * | 2021-12-24 | 2023-12-19 | 重庆美利信科技股份有限公司 | Die casting mold structure and die casting method for thin-wall shielding cover |
| CN116809892A (en) * | 2023-07-20 | 2023-09-29 | 宁波星源卓镁技术股份有限公司 | Magnesium alloy die casting die |
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| CN110216241A (en) | 2019-09-10 |
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