CN212945382U - Tilting type gravity casting equipment - Google Patents

Abstract

The application belongs to the technical field of gravity casting, and provides a tilting type gravity casting device which comprises a mold, a sand core assembly and a tilting device, wherein the mold is provided with a cavity for installing the sand core assembly, the top of the mold is provided with a sprue gate communicated with the cavity, the mold is further provided with a pouring tray for loading pouring materials, and the mold is provided with a first position for inputting the pouring tray and loading the pouring materials and a second position for enabling the pouring materials in the pouring tray to be injected from the sprue gate and fill the cavity; the tilting device is used for driving the mould to reciprocate between the first position and the second position, so that molten aluminum injection in the cavity gradually fills the whole cavity along with the change of the tilting angle and the sand core assembly. The application improves the structure of gravity casting equipment, improves the quality of casting products.

Description

Tilting type gravity casting equipment

Technical Field

The application belongs to the technical field of gravity casting, and particularly relates to tilting type gravity casting equipment.

Background

Gravity casting, which is a casting process under the action of earth gravity, is more applied to products with large wall thickness than low-pressure casting. A commonly used gravity casting process includes: the static gravity casting forming process and the tilting casting forming process are widely applied to the automobile aluminum alloy forming process particularly for the tilting casting process, and three common modes are adopted:

(1) and a metal cavity is completely adopted, and molten aluminum is molded by applying certain pressure during pouring to generate a casting.

(2) The sand core molding process realizes casting molding, and is characterized in that a plurality of sand cores are combined together through a core assembly fixture, molten aluminum is poured into a cavity formed by the sand cores to produce a casting, all shapes of the casting are formed by the sand cores, the number of the needed sand cores is large, and the investment cost is high.

(3) The metal mold gravity casting process is one mode of combining metal mold and sand core and features small number of tools and low cost of mold making and development. And, the gravity metal casting mold can adapt to the continuous adjustment of the product development stage. However, the common metal mold gravity casting process is difficult to use, and mainly takes the technical problems of feeding, mold filling, slag entrapment, air entrainment, molten aluminum cooling, product yield and the like into consideration.

In practical application, for casting technology of automobile aluminum alloy parts, casting production of complex-structure castings of engine cylinder covers, such as shown in fig. 1, is easy to generate finished product defects. As shown in fig. 2, a casting mold 1 for producing the casting in the prior art is provided, a sand core assembly 2 and a pouring pipe (not shown) connected with the bottom of the sand core assembly 2 are arranged in the mold 1, and molten aluminum is injected through a pouring port 10 at the side of the mold 1, and the molten aluminum enters the mold 1 and the inside of the sand core from the bottom through the pouring pipe, so as to form a bottom pouring structure. The casting formed by adopting the bottom pouring mode is easy to have defects. Firstly, the air discharge rate in the mold is low due to bottom pouring, so that the casting is easy to generate bubbles; secondly, an oxide film on the aluminum liquid is easy to mix into the casting to influence the quality of the casting; thirdly, because the casting is poured from the bottom, the bottom cooling and shaping of the casting are not facilitated, the casting, particularly a casting product with high strength requirement on the bottom of a similar engine cylinder cover, is caused, the structural strength after the casting is formed is insufficient, and the quality of the casting product is influenced.

Therefore, the castings produced by the gravity casting equipment in the prior art have more defects, and are the research difficulty of the current gravity casting manufacturers.

Disclosure of Invention

An object of the embodiment of this application is to provide a formula of verting gravity casting equipment to the defect that the pouring casting mode of gravity casting equipment among the prior art exists is solved, improves gravity casting equipment's structure, improves the quality of foundry goods product.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: the mould is provided with a cavity for installing the sand core assembly, the top of the mould is provided with a sprue gate communicated with the cavity, the mould is also provided with a pouring disc for loading pouring materials, and the mould is provided with a first position for inputting and loading the pouring materials to the pouring disc and a second position for injecting the pouring materials in the pouring disc from the sprue gate and filling the cavity; the tilting device is used for driving the mould to reciprocate between the first position and the second position, so that molten aluminum injection in the cavity gradually fills the whole cavity along with the change of the tilting angle and the sand core assembly.

The application provides a formula of verting gravity casting equipment's beneficial effect lies in: compared with the prior art, utilize the device that verts to vert to the mould to at the in-process that verts, let the pouring nozzle injection die cavity of pouring the material from the mould top in watering the dish, make the aluminium liquid pouring in the die cavity fill up whole die cavity and fill up psammitolite subassembly along with the change of angle of verting gradually. As the molten aluminum is poured into the cavity from one side and the whole cavity is gradually filled, the height of the static head of the molten aluminum pouring is gradually increased from small to large in the flowing process of the molten aluminum pouring, so that the gas is favorably discharged, the bubble formation of casting products is reduced, the problem of secondary slag inclusion of the filling caused by large static head in common gravity casting is avoided, the filling time and speed of the poured molten aluminum pouring are effectively controlled, and the whole filling process is stable, quick and effective. And moreover, the oxide film floating on the surface layer of the aluminum liquid injection material is kept at the top of the injection material, so that the oxide film is prevented from being mixed into the cavity to influence the quality of the produced and shaped casting product.

In addition, aiming at the casting products of engine cylinder covers, the bottom structural strength of the products is high, and the products need to be rapidly cooled and shaped during casting, so that the bottom structural strength of the casting products is ensured. Therefore, compared with a bottom pouring type filling structure, the bottom pouring type filling structure of the equipment can lead the bottom of the cavity to be continuously added with new molten aluminum for filling, and the filling cooling and shaping effects at the bottom of the cavity are influenced. This equipment is owing to adopt the tilting type pouring, and the material is annotated to aluminium liquid can only get into the die cavity from sprue gate one side at mould top to along with the mobile of the material is annotated to aluminium liquid is full of the psammitolite component in whole die cavity and the die cavity gradually, and the foundry goods can not have new aluminium liquid to annotate the material and add in solidifying fashioned in-process die cavity bottom position again, therefore the bottom structure cooling shaping of the foundry goods product that is favorable to die cavity bottom position to correspond ensures the fashioned foundry goods product bottom structural strength of casting production, improves the quality of foundry goods product. The application discloses formula of verting gravity casting equipment can realize the pouring casting mode of formula of verting, especially to the foundry goods product of engine cylinder head class, can reduce the preparation cycle and the cost of mould and equipment, is favorable to accelerating the development cycle of new product, can also reduce the casting defect of engine cylinder head class foundry goods product, improves the quality and the material yield of foundry goods product.

It is right the structure of mould is improved, the mould includes front mould, back mould, left mould, right mould and die block, the die cavity by the front mould the back mould the left side mould the right side mould and the die block encloses to close and forms, water the dish and locate on the back mould, psammitolite subassembly accept in the die cavity. Wherein, water the dish and set up on the back mould, be favorable to the mould to set up the mounted position in the device that verts to the cooperation verts the device drive mould and does the motion of verting of appointed direction. In the casting process, can incline to the operating position that makes the dish of watering can pour into and load aluminium liquid and annotate the material earlier, then along with inclining to incline of device drive mould, let in the dish of watering aluminium liquid annotate the material and flow into the die cavity of mould from sprue gate one side at mould top to be full of whole die cavity and fill up the psammitolite subassembly from one side of die cavity gradually, and then be favorable to gaseous discharge, improve the stationarity of filling the type.

The structure of the sand core assembly is improved, the sand core assembly comprises a riser core at the top, an oil pool core at the middle, a water jacket core at the bottom, an exhaust core and an air inlet core, the riser core is vertically connected with the oil pool core, and positioning protrusions matched with the mold for positioning are arranged on two sides of the riser core. Aiming at the casting of engine cylinder cover casting products, an oil pool core and a water jacket core are arranged in the sand core assembly. The oil pool core is made of core sand with oil as a main adhesive, and is beneficial to forming of engine cylinder cover casting products. The water jacket core is a necessary sand core accessory for producing and casting the engine cylinder cover casting, so that the production quality of the engine cylinder cover casting product is effectively improved. In addition, the positioning bulges are arranged on the two sides of the riser core positioned at the top of the sand core assembly, so that the automatic positioning of the sand core assembly in the die assembly process is facilitated, the casting forming accuracy of a casting is ensured, and the quality of a casting product is improved.

Optionally, the both sides of watering the dish be equipped with to the current-limiting baffle that the sprue gate of mould extends, current-limiting baffle shelves on the location is protruding, so that current-limiting baffle centers on the both sides of sprue gate utilizes this location protruding and the cooperation of shelving of the current-limiting baffle of watering the dish, and the flow direction of pouring aluminium liquid notes material from watering the dish toward the die cavity is restricted effectively, especially to the motion process that verts at the mould, ensures that aluminium liquid notes material pours into the die cavity fully, avoids splashing of aluminium liquid notes material to spill, gets rid of the potential safety hazard, improves the utilization ratio of aluminium liquid notes material.

Optionally, a material conveying port communicated with the material pouring port is arranged on the pouring tray, the pouring tray is a rectangular tray body with a side part of the material conveying port, a material feeding port communicated with the material conveying port is arranged at the top of the pouring tray, a bottom wall part is arranged at the bottom of the pouring tray, three side wall parts respectively connected with the bottom wall part are arranged in the circumferential direction of the pouring tray, two of the three side wall parts are respectively located at two sides of the material conveying port, and the end parts of the two side wall parts are respectively provided with the flow limiting baffle; a flow guide inclined plane is arranged between the bottom wall part and the material conveying opening of the pouring tray, and a confluence inclined plane which enables the injected materials to be concentrated and flow to the material conveying opening is respectively arranged between the side wall part and the bottom wall part and between the side wall part and the flow guide inclined plane. The flow guiding inclined plane and the flow converging inclined plane in the casting disc are used for being beneficial to limiting the flow direction of the molten aluminum injection material in the casting disc, and the molten aluminum injection material is effectively ensured to be accurately injected into a cavity of the mold by matching the casting disc to a pouring gate on the mold in the tilting process of the mold.

Optionally, the riser core is further provided with a riser feeding bag matched with the top of the riser core in shape, two sides of the riser feeding bag are provided with positioning forks, and the positioning protrusions are provided with catching grooves inserted with the positioning forks. On one hand, the feeding effect of the riser core is enhanced by the additional riser feeding bag, and the effects of preventing shrinkage cavity, shrinkage porosity, exhausting and scum collection and collecting surface oxide skin are effectively achieved. On the other hand, the positioning fork on the riser feeding bag is in insertion fit with the fastening groove on the positioning protrusion to strengthen the fixation of the positioning protrusions on the two sides of the riser core, so that the positioning protrusion is prevented from falling off in the casting process to influence the casting forming of a casting, the positioning effect of the riser feeding bag on the riser core is effectively improved, and then the corresponding position on the riser core is fed.

The structure of the die is improved, mounting grooves which are in embedded connection with the positioning bulges are respectively arranged on the left die and the right die, positioning columns are arranged on the mounting grooves of the left die and the right die, pouring holes are arranged on the positioning columns, and positioning grooves which are in inserted connection with the positioning columns are arranged at the edges of the positioning bulges; and the mounting grooves of the left die and the right die are respectively provided with a positioning lug, and the bottom of the positioning lug is provided with a slot which is embedded with the positioning lug. By utilizing the positioning protrusions and the mounting grooves, the positioning columns and the positioning grooves, and the positioning lugs and the slots to be positioned and fixedly matched in multiple aspects, the left die and the right die can be accurately enclosed on two sides of the sand core component in the die closing process, a cavity in the die can be locked for accurate forming, and the casting forming quality of a casting product can be effectively ensured. And a pouring hole is formed in the positioning column, so that the positioning column can be used as a feeding channel at the same time, and the applicability of the positioning column is effectively improved.

Optionally, the front mold and the rear mold are respectively provided with a fixing strip for limiting the sand core assembly in the cavity, the fixing strip extends to the pouring gate of the mold, and the positioning protrusion is provided with a fixing groove embedded with the fixing strip. The fixing strip is embedded and matched with the fixing groove in the positioning protrusion, so that accurate alignment in the die assembling process of the front die and the rear die is facilitated, and the positioning effect and the fixing effect on the sand core assembly are effectively improved.

Optionally, be equipped with on the die block and be used for following the fashioned foundry goods of casting ejecting ejection mechanism in the die cavity, ejection mechanism includes the ejector pin and is used for the drive the ejecting seat of ejector pin, be equipped with a plurality of through-holes on the die block, be equipped with a plurality of on the ejecting seat the ejector pin, and it is a plurality of the ejector pin is followed the through-hole of die block penetrates in the die cavity. In practical application, the ejection mechanism on the die is kept in an initial state, and each ejector rod is only fixed on the through hole and is not inserted into the cavity; and when the casting is ejected, the ejection seat moves towards the bottom die, so that the ejector rods penetrate into the cavity from the through holes in the bottom die, the cast and molded casting is ejected out of the die, and the casting product is effectively and completely moved out of the die.

The structure of the tilting device is improved, the tilting device is provided with an installation platform for installing the die, and the installation platform is provided with an installation opening for embedding a bottom die of the die; the mounting table is provided with a plurality of first oil cylinder drivers arranged around the die, and the first oil cylinder drivers are respectively connected with the front die, the rear die, the left die, the right die and the bottom die of the die and can drive the front die, the rear die, the left die, the right die and the bottom die to perform die closing movement; the bottom of the tilting device is provided with a support connected with the mounting table, the support is provided with a second oil cylinder driver and a support rod, and the second oil cylinder driver can drive the support rod to jack up the mounting table and enable the mounting table to stand on the support. On one hand, each first oil cylinder driver on the tilting device is used for driving a front mold, a rear mold, a left mold, a right mold and a bottom mold of the mold, and the sand core assembly is used as the center to surround the sand core assembly from five directions to complete mold assembly, so that a casting cavity in the mold is formed. On the other hand, the device that verts is equipped with the support of connecting the mount table to through the cooperation of the second hydro-cylinder driver on the support with the bracing piece, the drive mount table does the motion of verting, lets the mount table can place or stand to switch between two operating position of placing at the level, thereby makes the mould that sets up on the mount table switch between primary importance and second place, realizes the pouring casting production that verts.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic illustration of a casting of an engine cylinder head;

FIG. 2 is a schematic diagram of a prior art mold for producing an engine cylinder head casting;

FIG. 3 is a schematic structural diagram illustrating an embodiment of a tilting gravity casting apparatus driving a mold to a first position;

FIG. 4 is a schematic structural diagram illustrating an embodiment of a tilting gravity casting apparatus driving a mold to a second position;

fig. 5 is a schematic perspective view of a mold according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of an assembly structure of a mold and a sand core assembly provided in an embodiment of the present application;

FIG. 7 is a schematic diagram of an exploded structure of a mold according to an embodiment of the present disclosure;

fig. 8 is a schematic perspective view of a riser core provided in an embodiment of the present application;

fig. 9 is a schematic view of an assembly structure of a sand core assembly provided in an embodiment of the present application;

fig. 10 is a schematic perspective view of a right mold according to an embodiment of the present disclosure;

fig. 11 is a schematic perspective view of a bottom mold according to an embodiment of the present disclosure;

fig. 12 is an exploded view of a bottom mold according to an embodiment of the present disclosure;

fig. 13 is a schematic perspective view of a tilting device according to an embodiment of the present application.

Wherein, in the figures, the respective reference numerals:

100-a cavity;

1-a mould; 10-a pouring gate; 11-front mould; 12-back mould; 13-left mould; 14-right mold; 15-bottom die; 150-a via;

2-a sand core assembly; 21-a riser core; 22-oil sump core; 23-water jacket core; 24-an exhaust core; 25-an air inlet core; 26-feeder feeding bag; 261-positioning fork;

3-a tilting device; 30-a mounting port; 31-a mounting table; 32-a first cylinder actuator; 33-a scaffold; 34-a second cylinder driver; 35-a support bar;

4-casting a disc; 40-a feeding port; 41-a flow-restricting baffle; 42-material conveying port; 43-bottom wall portion; 44-a sidewall portion; 45-diversion inclined plane; 46-a converging bevel;

5-positioning the projection; 51-a catching groove; 52-positioning grooves; 53-slot; 54-fixed groove;

6-mounting grooves; 61-a positioning column; 610-a pouring hole; 62-positioning the bump;

7-fixing strips;

8-an ejection mechanism; 81-an ejection seat; 82-mandril.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 3, 4 and 5 together, the tilting gravity casting apparatus according to the embodiment of the present application will now be described. The tilting gravity casting equipment comprises a mould 1, a sand core assembly 2 and a tilting device 3, please refer to fig. 5 and fig. 6 together, wherein the mould 1 is provided with a cavity 100 for installing the sand core assembly 2, the top of the mould 1 is provided with a sprue gate 10 communicated with the cavity 100, the mould 1 is also provided with a pouring tray 4 for loading pouring materials, the mould 1 is provided with a first position for inputting and loading the pouring materials for the pouring tray 4 and a second position for injecting the pouring materials in the pouring tray 4 from the sprue gate 10 and filling the cavity 100; the tilting device 3 is used for driving the mould 1 to reciprocate between the first position and the second position, and the molten aluminum injection in the cavity 100 is gradually filled in the whole cavity 100 along with the change of the tilting angle and the sand core assembly 2 is filled in the molten aluminum injection.

Compared with the prior art, the tilting type gravity casting equipment provided by the application utilizes the tilting device 3 to tilt the mould 1, and in the tilting process, the pouring material in the pouring disc 4 is poured into the cavity 100 from the pouring gate 10 at the top of the mould 1, so that the molten aluminum pouring material in the cavity 100 is gradually full of the whole cavity 100 along with the change of the tilting angle and the sand core assembly 2 is filled. As the molten aluminum is poured into the cavity 100 from one side and gradually fills the whole cavity 100, the height of the static pressure head of the molten aluminum pouring is gradually increased from small to large in the flowing process of the molten aluminum pouring, which is beneficial to the discharge of gas, reduces the formation of bubbles of casting products, avoids the problem of secondary slag inclusion of the pouring type caused by large static pressure head in common gravity casting, effectively controls the time and speed of pouring molten aluminum pouring, and makes the whole pouring process stable, quick and effective. Moreover, the oxide film floating on the surface layer of the aluminum liquid injection material is kept on the top of the injection material, so that the oxide film is prevented from being mixed into the cavity 100 to influence the quality of the produced and shaped casting product.

Aiming at casting products of engine cylinder covers, the bottom structural strength of the products is high in requirement, and the products need to be cooled and shaped quickly during casting, so that the bottom structural strength of the casting products is ensured. Therefore, compared with the bottom pouring type filling structure, the bottom pouring type filling structure of the equipment can lead to the fact that new molten aluminum is continuously added to the bottom of the cavity 100, and the material injection, cooling and shaping effects of the bottom of the cavity 100 are affected. This equipment is owing to adopt the tilting type pouring, the material is annotated to aluminium liquid only can get into in the die cavity 100 from sprue gate 10 one side at mould 1 top, and along with the mobile of the material is annotated to aluminium liquid and be full of whole die cavity 100 and the psammitolite component 2 in the die cavity 100 gradually, the foundry goods can not have new aluminium liquid to annotate the material and add at solidification fashioned in-process die cavity 100 bottom position again, therefore be favorable to the bottom structure cooling shaping of the foundry goods product that the die cavity 100 bottom position corresponds, ensure the fashioned foundry goods product bottom structural strength of casting production, improve the quality of foundry goods product. The application discloses tilting type gravity casting equipment orders about mould 1 and can rotate between tilting state and horizontality controllablely, casting production is carried out by the horizontal state in-process of tilting state gyration at the pouring mould, especially to the foundry goods product of engine cylinder head class, can reduce the preparation cycle and the cost of mould 1 and equipment, is favorable to accelerating the development cycle of new product, can also reduce the casting defect of engine cylinder head class foundry goods product, improves the quality and the material yield of foundry goods product.

In another embodiment of the present application, the structure of the mold 1 is optimized, referring to fig. 7, the mold 1 includes a front mold 11, a rear mold 12, a left mold 13, a right mold 14, and a bottom mold 15, the cavity 100 is enclosed by the front mold 11, the rear mold 12, the left mold 13, the right mold 14, and the bottom mold 15, the casting tray 4 is disposed on the rear mold 12, and the sand core assembly 2 is accommodated in the cavity 100. Wherein, water set 4 and set up on back mould 12, be favorable to mould 1 to set up the mounted position in tilting device 3 to the cooperation tilts device 3 and drives mould 1 and make the tilting motion of appointed direction. In the casting process, can incline to the operating position that makes to water dish 4 and can pour into and load aluminium liquid and annotate the material earlier with mould 1, then along with inclining to incline to rotate device 3 drive mould 1, let to water in the dish 4 aluminium liquid and annotate the material and flow into mould 1's die cavity 100 from pouring gate 10 one side at mould 1 top to be full of whole die cavity 100 and fill up psammitolite component 2 from one side of die cavity 100 gradually, be favorable to gaseous discharge, improve the stationarity of filling the type.

In another embodiment of the present application, the structure of the sand core assembly 2 is optimized, and referring to fig. 8 to 9, the sand core assembly 2 includes a top riser core 21, a middle oil pool core 22, and a bottom water jacket core 23, an exhaust core 24 and an air intake core 25, wherein the riser core 21 and the oil pool core 22 are connected up and down. For casting of an engine cylinder head casting product, an oil pool core 22 and a water jacket core 23 are arranged in the sand core assembly 2. The oil pool core 22 is made of core sand with oil as a main binder, and is beneficial to forming of engine cylinder cover casting products. The water jacket core 23 is a necessary sand core fitting for producing and casting engine cylinder cover castings, and therefore production quality of engine cylinder cover casting products is effectively improved.

Referring to fig. 7, 8 and 9, positioning protrusions 5 for positioning in cooperation with the mold 1 are disposed on two sides of the riser core 21, so as to facilitate automatic positioning of the sand core assembly 2 during mold closing of the mold 1, ensure casting accuracy, and improve quality of a casting product.

In another embodiment of the present application, please refer to fig. 5 and 6 together, two sides of the pouring tray 4 are provided with a flow limiting baffle 41 extending to the pouring gate 10 of the mold 1, the flow limiting baffle 41 is placed on the positioning protrusion 5, so that the flow limiting baffle 41 surrounds two sides of the pouring gate 10, the placing cooperation of the positioning protrusion 5 and the flow limiting baffle 41 of the pouring tray 4 is utilized to effectively limit the flow direction of the molten aluminum pouring material poured from the pouring tray 4 into the cavity 100, especially in the tilting movement process of the mold 1, the molten aluminum pouring material is ensured to be fully poured into the cavity 100, the splashing and scattering of the molten aluminum pouring material is avoided, the potential safety hazard is eliminated, and the utilization rate of the molten aluminum pouring material is improved.

In another embodiment of the present application, please refer to fig. 5, fig. 6 and fig. 7 together, a material feeding port 42 communicated with the pouring port 10 is provided on the pouring tray 4, the pouring tray 4 is a rectangular tray body having a side portion of the material feeding port 42, a material feeding port 40 communicated with the material feeding port 42 is provided at the top of the pouring tray 4, a bottom wall portion 43 is provided at the bottom of the pouring tray 4, three side wall portions 44 respectively connected with the bottom wall portion 43 are provided at the circumferential direction of the pouring tray 4, two of the three side wall portions 44 are respectively located at two sides of the material feeding port 42, and the end portions of the two side wall portions 44 are respectively provided with the flow limiting baffle 41; a flow guiding inclined plane 45 is arranged between the bottom wall 43 and the material delivery port 42 of the pouring tray 4, and a converging inclined plane 46 for concentrating the injected material to flow to the material delivery port 42 is respectively arranged between the side wall 44 and the bottom wall 43 and between the side wall 44 and the flow guiding inclined plane 45. The flow guide inclined surface 45 and the confluence inclined surface 46 in the casting disc 4 are used for helping to limit the flow direction of the molten aluminum injection material in the casting disc 4, and particularly, the flow guide inclined surface and the confluence inclined surface are matched with the casting disc 4 to perform casting towards the pouring gate 10 on the mold 1 in the tilting process of the mold 1, so that the molten aluminum injection material is effectively ensured to be accurately injected into the cavity 100 of the mold 1.

In another embodiment of the present application, referring to fig. 9, a riser feeding bag 26 adapted to the shape of the top of the riser core 21 is further disposed on the riser core 21, so as to enhance the feeding effect of the riser core 21, and effectively prevent shrinkage cavity, shrinkage porosity, exhaust, scum collection and surface scale collection.

Referring to fig. 9, two sides of the feeder head feeding bag 26 are provided with positioning forks 261, and the positioning protrusions 5 are provided with catching grooves 51 inserted into the positioning forks 261, so as to strengthen the fixation of the positioning protrusions 5 on two sides of the feeder head core 21, prevent the positioning protrusions 5 from falling off during the casting process, influence the casting molding of the casting, and simultaneously effectively improve the positioning effect of the feeder head feeding bag 26 mounted on the feeder head core 21, thereby feeding the corresponding position on the feeder head core 21.

In another embodiment of the present application, the structure of the mold 1 is optimized, please refer to fig. 8, 9 and 10, wherein the left mold 13 and the right mold 14 are respectively provided with an installation groove 6 engaged with the positioning protrusion 5, the installation grooves 6 of the left mold 13 and the right mold 14 are provided with a positioning column 61, the positioning column 61 is provided with a pouring hole 610, and the edge of the positioning protrusion 5 is provided with a positioning groove 52 engaged with the positioning column 61; the mounting grooves 6 of the left die 13 and the right die 14 are respectively provided with a positioning lug 62, and the bottom of the positioning bulge 5 is provided with a slot 53 which is embedded with the positioning lug 62. By utilizing the multi-aspect positioning and fixing matching of the positioning protrusion 5, the mounting groove 6, the positioning column 61, the positioning groove 52 and the positioning lug 62 with the slot 53, the left die 13 and the right die 14 are accurately enclosed at two sides of the sand core component 2 in the die closing process, the cavity 100 in the die 1 is locked for accurate forming, and the casting forming quality of a casting product is effectively ensured.

Referring to fig. 10, the positioning column 61 is further provided with a pouring hole 610, so that the positioning column 61 can be used as a feeding channel at the same time, and the applicability of the positioning column 61 is effectively improved.

In another embodiment of the present application, referring to fig. 7 and 9, the front mold 11 and the rear mold 12 are respectively provided with a fixing strip 7 for limiting the sand core assembly 2 in the cavity 100, the fixing strip 7 extends to the pouring gate 10 of the mold 1, and the positioning protrusion 5 of the riser core 21 is provided with a fixing groove 54 engaged with the fixing strip 7. The fixing strip 7 is in scarf joint fit with the fixing groove 54 on the positioning protrusion 5, so that accurate alignment of the front mold 11 and the rear mold 12 in the mold closing process is facilitated, and the positioning effect and the fixing effect on the sand core assembly 2 are effectively improved.

In another embodiment of the present application, please refer to fig. 11 and 12 together, the bottom die 15 is provided with an ejection mechanism 8 for ejecting a casting from the cavity 100, the ejection mechanism 8 includes an ejector rod 82 and an ejection seat 81 for driving the ejector rod 82, the bottom die 15 is provided with a plurality of through holes 150, the ejection seat 81 is provided with a plurality of ejector rods 82, and a plurality of ejector rods 82 penetrate into the cavity 100 from the through holes 150 of the bottom die 15. In practical application, the ejection mechanism 8 on the mold 1 is kept in an initial state, and each ejector rod 82 is only fixed on the through hole 150 and is not inserted into the cavity 100; during the ejection stage of the casting, the ejection seat 81 is displaced towards the bottom mold 15, so that each ejector rod 82 penetrates into the cavity 100 from the through hole 150 on the bottom mold 15, and the cast casting is ejected out of the mold 1, thereby effectively moving the casting product out of the mold 1 completely.

In another embodiment of the present application, the structure of the tilting device 3 is optimized, please refer to fig. 3, 4 and 13 together, an installation table 31 for installing the mold 1 is provided on the tilting device 3, and an installation opening 30 for embedding the bottom mold 15 of the mold 1 is provided on the installation table 31; be equipped with on mount table 31 around a plurality of first hydro-cylinder drivers 32 that mould 1 set up, a plurality of first hydro-cylinder drivers 32 respectively with front mould 11, back mould 12, left mould 13, right mould 14 and die block 15 of mould 1 are connected and can drive front mould 11 back mould 12 left mould 13 right mould 14 and die block 15 makes the motion of closing the mould. The front mold 11, the rear mold 12, the left mold 13, the right mold 14, and the bottom mold 15 of the mold 1 are driven by the respective first cylinder actuators 32 of the tilting device 3, and the mold assembly 2 is closed around the core assembly 2 from five directions with the core assembly 2 as the center, thereby forming a casting cavity 100 in the mold 1.

In addition to the above, referring to fig. 3, 4 and 13, a bracket 33 connected to the mounting table 31 is provided at the bottom of the tilting device 3, a second cylinder actuator 34 and a support rod 35 are provided on the bracket 33, and the second cylinder actuator 34 can drive the support rod 35 to jack up the mounting table 31 and raise the mounting table 31 from the bracket 33. The tilting device 3 drives the mounting platform 31 to perform tilting movement through the matching of the second oil cylinder driver 34 on the bracket 33 and the support rod 35, so that the mounting platform 31 can be switched between two working positions in which the mounting platform is horizontally placed or vertically placed, and the die 1 arranged on the mounting platform 31 can be switched between the first position and the second position, thereby realizing the tilting casting production.

Referring to fig. 3, 4 and 13, the tilting gravity casting apparatus according to the embodiment of the present application drives the mold 1 to controllably rotate between the tilting state and the horizontal state, and performs casting production during the process of rotating the casting mold 1 from the tilting state to the horizontal state, and the operation principle includes:

(1) and (3) core setting, resetting the mounting table 31 to a horizontal state by the tilting device 3, mounting the sand core assembly 2 on the equipment, and then blowing sand.

(2) The molds are closed by closing the front mold 11, the rear mold 12, the left mold 13, the right mold 14, and the bottom mold 15 of the mold 1 around the core assembly 2 from five directions by the first cylinder actuators 32 of the tilting device 3.

(3) Tilting, starting the tilting device 3, driving the support rod 35 by the second cylinder driver 34 on the tilting device 3 to tilt the mounting platform 31 to the standing state, so that the die 1 on the mounting platform 31 is at the first position where molten aluminum can be input into the pouring tray 4.

(4) Pouring, namely conveying the pouring ladle aluminum liquid pouring material to a pouring tray 4 of the mold 1 through a manipulator, and inputting the aluminum liquid pouring material to the pouring tray 4.

(5) The tilting casting, the tilting device 3 is started again, the second oil cylinder driver 34 on the tilting device 3 drives the support rod 35 to tilt the mounting platform 31 from the standing state to the horizontal state, the pouring disc 4 on the mold 1 pours into the cavity 100 of the mold 1, and the whole cavity 100 is filled with the molten aluminum and the sand core assembly 2 in the mold 1 is filled with the molten aluminum.

(6) And (3) solidifying, namely fixing the mounting table 31 in a horizontal state, and gradually solidifying the molten aluminum injection material in the cavity 100 of the mold 1 so as to solidify the cast product.

(7) And (3) opening the mold, wherein the front mold 11, the rear mold 12, the left mold 13, the right mold 14 and the bottom mold 15 of the mold 1 are moved away by each first cylinder driver 32 on the tilting device 3.

(8) And (3) taking the casting, starting the ejection mechanism 8 on the mold 1, and displacing the ejection seat 81 towards the bottom mold 15, so that each ejection rod 82 penetrates into the cavity 100 from the through hole 150 on the bottom mold 15, and ejecting the casting out of the mold 1 from the cavity 100.

Wherein, at the in-process of gravity vert casting production, there is following technological parameter to need carry out the management and control, specifically includes:

(a) the angle of the tilt casting is generally set to-3 to 89 degrees.

(b) The tilting speed is divided into 7 sections according to the water inlet speed of pouring, the speed of each section is set according to the pouring condition, and the general pouring time is within 25 seconds.

(c) Setting a water cooling channel and setting air extraction parameters.

(d) Setting of curing time, etc.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a tilting type gravity casting equipment which characterized in that: the sand core assembly tilting device comprises a mold, a sand core assembly and a tilting device, wherein the mold is provided with a cavity for mounting the sand core assembly, the top of the mold is provided with a pouring gate communicated with the cavity, the mold is also provided with a pouring disc for loading pouring materials, and the mold is provided with a first position for inputting and loading the pouring disc and a second position for injecting the pouring materials in the pouring disc from the pouring gate and filling the cavity; the tilting device is used for driving the mould to reciprocate between the first position and the second position, so that molten aluminum injection in the cavity gradually fills the whole cavity along with the change of the tilting angle and the sand core assembly.

2. The tilting gravity casting apparatus according to claim 1, wherein: the mould includes front mould, back mould, left mould, right mould and die block, the die cavity by the front mould the back mould left side mould right side mould and the die block encloses to close and forms, water the dish and locate on the back mould.

3. The tilting gravity casting apparatus according to claim 2, wherein: the sand core assembly comprises a riser core at the top, an oil pool core at the middle, and a water jacket core, an exhaust core and an air inlet core at the bottom, the riser core is connected with the oil pool core up and down, and positioning protrusions used for being matched and positioned with the mold are arranged on two sides of the riser core.

4. The tilting gravity casting apparatus according to claim 3, wherein: and flow-limiting baffles extending to the pouring gate of the mold are arranged on two sides of the pouring disc and are placed on the positioning bulges.

5. The tilting gravity casting apparatus according to claim 4, wherein: the pouring tray is provided with a material conveying port communicated with the pouring port, the pouring tray is a rectangular tray body with a side part of the material conveying port, the top of the pouring tray is provided with a material feeding port communicated with the material conveying port, the bottom of the pouring tray is provided with a bottom wall part, three side wall parts respectively connected with the bottom wall part are arranged in the circumferential direction of the pouring tray, two of the three side wall parts are respectively positioned on two sides of the material conveying port, and the end parts of the two side wall parts are respectively provided with the current limiting baffle; a flow guide inclined plane is arranged between the bottom wall part and the material conveying opening of the pouring tray, and a confluence inclined plane which enables the injected materials to be concentrated and flow to the material conveying opening is respectively arranged between the side wall part and the bottom wall part and between the side wall part and the flow guide inclined plane.

6. The tilting gravity casting apparatus according to claim 3, wherein: the riser core is further provided with a riser feeding bag matched with the top of the riser core in shape, two sides of the riser feeding bag are provided with positioning forks, and the positioning protrusions are provided with catching grooves inserted with the positioning forks.

7. The tilting gravity casting apparatus according to claim 3, wherein: mounting grooves which are in scarf joint with the positioning bulges are respectively arranged on the left die and the right die, positioning columns are arranged on the mounting grooves of the left die and the right die, pouring holes are arranged on the positioning columns, and positioning grooves which are in plug-in connection with the positioning columns are arranged at the edges of the positioning bulges; and the mounting grooves of the left die and the right die are respectively provided with a positioning lug, and the bottom of the positioning lug is provided with a slot which is embedded with the positioning lug.

8. The tilting gravity casting apparatus according to claim 3, wherein: the front die and the rear die are respectively provided with a fixing strip used for limiting the sand core assembly in the cavity, the fixing strip extends to the pouring gate of the die, and the positioning bulge is provided with a fixing groove embedded with the fixing strip.

9. The tilting gravity casting apparatus according to claim 2, wherein: the die block is provided with an ejection mechanism for ejecting a casting formed by casting in the die cavity, the ejection mechanism comprises an ejector rod and an ejection seat for driving the ejector rod, the die block is provided with a plurality of through holes, the ejection seat is provided with a plurality of ejector rods, and the ejector rods penetrate into the die cavity from the through holes of the die block.

10. The tilting gravity casting apparatus according to any one of claims 2 to 9, wherein: the tilting device is provided with an installation platform for installing the die, and the installation platform is provided with an installation opening for embedding a bottom die of the die; the mounting table is provided with a plurality of first oil cylinder drivers arranged around the die, and the first oil cylinder drivers are respectively connected with the front die, the rear die, the left die, the right die and the bottom die of the die and can drive the front die, the rear die, the left die, the right die and the bottom die to perform die closing movement; the bottom of the tilting device is provided with a support connected with the mounting table, the support is provided with a second oil cylinder driver and a support rod, and the second oil cylinder driver can drive the support rod to jack up the mounting table and enable the mounting table to stand on the support.

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