CN218611563U

CN218611563U - Core making process structure of vermicular graphite cast iron vertical casting cylinder head cover surface core

Info

Publication number: CN218611563U
Application number: CN202222314128.8U
Authority: CN
Inventors: 赵鹏; 郭康康; 井园园
Original assignee: Asimco International Casting Co ltd Shanxi
Current assignee: Asimco International Casting Co ltd Shanxi
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2023-03-14
Anticipated expiration: 2032-09-01

Abstract

The utility model discloses a core making technology structure of vermicular graphite cast iron vertical casting cylinder head cover face core, which comprises a die, there is the oil spout mouth at the mould middle part, there is the top facing son of taking on oil spout mouth upside, wherein, be provided with the rising head in the mould, the rising head includes the rising head body, the side of rising head body is equipped with the connecting seat of connecting the mould, be equipped with the benefit shrinkage cavity in the middle of the connecting seat, the benefit shrinkage cavity aligns with top facing son portion, make the rising head can carry out the feeding to the fuel sprayer position through the top facing son, still be provided with riser base core between mould and the connecting seat, the back and the connection seat face contact of riser base core, the front and the mould face contact of riser base core, the side of riser base core, part and mould face contact, riser base core is equipped with the intercommunicating pore directly over the son is taken on the top facing for the intercommunication benefit shrinkage cavity. The riser base core is arranged, so that a riser can be arranged at the position of an oil nozzle of a cylinder cover, the riser can be used for feeding the position of the oil nozzle, and the problem of shrinkage porosity of the cylinder cover is solved.

Description

Core making process structure of vermicular graphite cast iron vertical casting cylinder head cover surface core

Technical Field

The utility model relates to a diesel engine cylinder head casting technical field, concretely relates to vermicular graphite cast iron founds coremaking technology structure of watering head cover face core.

Background

At present, a vertical casting process is generally adopted in a high-grade vermicular graphite cast iron cylinder cover casting process design method, a box of two-piece layout is selected according to a production line, in the production process, hot joint parts such as cylinder cover bolt holes, guide pipe holes and oil nozzles are more, a temperature field is complex, wall thickness thinning caused by casting lightening aggravates shrinkage cavity shrinkage porosity tendency, in addition, the solidification characteristic of the high-grade vermicular graphite cast iron per se causes that the hot joint parts cannot be effectively fed, an isolated liquid phase region is formed, and the defect of shrinkage cavity shrinkage porosity is generated.

The Chinese invention CN113182496A discloses a casting process design method of a high-grade vermicular cast iron cylinder cover, which adopts a one-box two-piece vertical casting process and comprises the following steps: s1, determining a pouring system as an injection type, designing the pouring system between two combined cores, and designing a full-package sand core; s2, determining the position of an inner pouring gate, wherein the position of the inner pouring gate is arranged near a hot spot part of a casting bolt hole; designing a gating system on the bottom surface of the chassis core, wherein half gating systems are formed on the bottom surfaces of 2 chassis cores respectively, and a complete gating system is formed on the bottom surfaces of 2 chassis cores after core combination; s3, determining an exhaust system forming mode; s4, adopting a cold iron-free process; s5, all sand cores of the cylinder cover are combined into a core and locked by a lock core screw, and then core discharging, box assembling and pouring waiting are carried out; and S6, casting. The invention solves the problem of shrinkage porosity of the cylinder cover by arranging the position of the inner sprue near the hot joint part of the casting bolt hole. However, in the production practice of the cylinder cover, the problem of shrinkage porosity of the position of the oil nozzle is more common and the proportion is higher. Seriously influence yield and product delivery rate, the oil nozzle is in the middle position of cylinder cap, and the process design of end pouring can't set up the ingate position here in order to solve the shrinkage porosity problem. The conventional modes for solving shrinkage porosity are two, cold iron is placed at a hot spot to realize sequential solidification or a riser is placed at a position where shrinkage porosity is easy to generate for feeding, and the space of an oil nozzle of a cylinder cover is narrow and complex in structure, so that the cold iron or the riser is difficult to place.

Disclosure of Invention

The utility model discloses a solve cylinder cap fuel sprayer position because the narrow and small structure in space is complicated to be difficult to set up the technical problem of rising head, provide a vermicular graphite cast iron that can set up the rising head at the fuel sprayer position and found the core-making technology structure of cylinder head cover face core of watering to effectively solve the shrinkage porosity problem of fuel sprayer position.

The utility model discloses a technical scheme be, a core making technology structure of vermicular graphite cast iron founds cylinder head cover face core, which comprises a die, there is the oil spout mouth at the mould middle part, there is the top facing to take the sub-part spout mouth upside, wherein, be provided with the rising head in the mould, the rising head includes the rising head body, the side of rising head body is equipped with the connecting seat of connecting the mould, be equipped with the benefit shrinkage cavity in the middle of the connecting seat, the benefit shrinkage cavity aligns with top facing lug part, make the rising head can carry out the benefit to the oil spout position through the top facing lug, still be provided with the top facing base core between mould and the connecting seat, the back and the connection seat face contact of top facing base core, the front and the mould face contact of top facing base core, the side of top facing base core, part and mould face contact, the edge line of face contact extends to the back along with the shape and forms along with the face, the part that does not be the mould face contact is the free face, the free face is connected with the face along with the shape face, the top facing base core is equipped with the intercommunicating hole directly over the top facing lug, be used for communicate the benefit shrinkage cavity.

Further, the free surface is a circular arc surface.

Further, the arc surface coincides with the axis of the communication hole.

Further, the free surface is arranged outside the peripheral contour of the connecting seat.

Further, the back of the riser base core is higher than the highest point of the upper cover surface of the die.

The utility model discloses a set up riser base core, make cylinder cap fuel sprayer position can set up the riser, the big plane at riser base core back makes things convenient for the riser location and places, and the sand filling is not influenced yet, and the riser can carry out the feeding to the fuel sprayer position, solves the cylinder cap shrinkage porosity problem.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a plan view of the present invention.

Fig. 3 is a schematic view of the riser and riser base core assembly of the present invention.

Fig. 4 is a schematic view of the riser of the present invention.

Fig. 5 is a schematic view of the riser base core of the present invention.

Icon: 1. a mold; 11. a nozzle spout; 12. a mat-covered mounting part; 2. a riser; 21. a riser body; 22. a connecting seat; 23. hole shrinkage is compensated; 3. a riser base core; 31. following the shape of the surface; 32. a free surface; 33. and (4) connecting the holes.

Detailed Description

In order to better understand the purpose, structure and function of the present invention, the core-making process structure of the cover core of vermicular cast iron vertical-casting cylinder head of the present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-5, a core making process structure of a cover core of a vermicular cast iron vertical casting cylinder cover comprises a mold 1, wherein an oil spout 11 is arranged in the middle of the mold 1, a cover surface lapping sub-part 12 is arranged on the upper side of the oil spout 11, a riser 2 is arranged in the mold 1, the riser 2 comprises a riser body 21, a connecting seat 22 connected with the mold 1 is arranged on the side surface of the riser body 21, a feeding hole 23 is arranged in the middle of the connecting seat 22, the feeding hole 23 is connected with the cover surface lapping sub-part 12, so that the riser 2 can feed the position of the oil spout through the cover surface lapping sub-part, a riser base core 3 is arranged between the cover surface lapping sub-part 12 and the connecting seat 22, the back surface of the riser base core 3 is a plane and is in surface contact with the connecting seat 22, the front surface of the riser base core 3 is in surface contact with the special-shaped mold 1, the side surface of the riser base core 3 is partially in surface contact with the mold 1, an edge line in surface contact with the back surface to form a following surface 31, a part which is extended to the back surface without being in a surface contact with the mold 1 is a free surface 32, the free surface 32 is connected with the following surface 31, the free surface of the riser base core 3 is arranged above the cover surface lapping sub-shaped base core 12, and is provided with a feeding hole 23 for communicating hole 33 for communicating with the feeding sub-surface. The utility model discloses a set up riser base core 3, make narrow and small, the complicated cylinder cap fuel sprayer position in structure in space can set up riser 2, riser 2 can carry out the feeding to the fuel sprayer position to solve the cylinder cap shrinkage porosity problem. Meanwhile, the large plane on the back of the riser base core 3 facilitates positioning and placement of the riser, and sand filling is not affected.

In this embodiment, the free surface 32 is an arc surface, and the arc surface coincides with the axis of the communicating hole 33, which facilitates positioning of the riser 2. Meanwhile, the free surface 32 extends to the outer side of the peripheral outline of the connecting seat 22, so that the riser 2 is convenient to mount, and the phenomenon that the riser 2 generates virtual sand below the connecting seat 22 after being mounted can be avoided. The back surface of the riser base core 3 is higher than the highest point of the upper cover surface of the mould 1, so that the molding sand is prevented from covering the riser base core in the first sand releasing process.

The utility model discloses a core making technology through the rising head base core 3 that sets up, makes cylinder cap fuel sprayer position set up rising head 2 easily, and the big plane at the 3 backs of rising head base core makes things convenient for rising head 2 to fix a position and place, and the sand-packed is not influenced yet, adopts the utility model discloses core making technology at the position that cylinder cap top facing fuel sprayer corresponds, each fuel sprayer department sets up a corresponding rising head 2, and rising head 2 plays the effect of molten iron overflow feeding to the fuel sprayer position, and the yield of foundry goods is improved to the shrinkage porosity proportion of the upright casting cylinder cap fuel sprayer position of reduction that can be fine, reduces the processing cost, improves the delivery rate.

It is to be understood that the present invention has been described with reference to certain embodiments and that various changes or equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention as defined by the appended claims. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims

1. A core making process structure of a vermicular cast iron vertical casting cylinder head cover surface core comprises a die (1), an oil spout part (11) is arranged in the middle of the die (1), a cover surface lapping sub-part (12) is arranged on the upper side of the oil spout part (11), the injection molding machine is characterized in that a riser (2) is arranged in a mold (1), the riser (2) comprises a riser body (21), a connecting seat (22) connected with the mold (1) is arranged on the side face of the riser body (21), a compensation hole (23) is formed in the middle of the connecting seat (22), the compensation hole (23) is aligned with a cover face lapping sub-portion (12), so that the riser (2) can compensate the position of an oil nozzle through the cover face lapping, a riser base core (3) is further arranged between the mold (1) and the connecting seat (22), the back face of the riser base core (3) is in surface contact with the connecting seat (22), the front face of the riser base core (3) is in surface contact with the mold (1), part of the side face of the riser base core (3) is in surface contact with the mold (1), the edge line of the surface contact extends to the back face along the shape to form a following surface (31), the part of the riser base core not in surface contact with the mold is a free surface (32), the free surface (32) is connected with the following surface (31), and the compensation hole (33) is arranged above the cover lapping sub-portion (12) of the riser base core (3) and is used for communication.

2. The core making process structure of the vermicular cast iron vertical casting cylinder head cover surface core as claimed in claim 1, wherein the free surface (32) is a circular arc surface.

3. The core making process structure of the cover surface core of the vermicular cast iron vertical casting cylinder head according to claim 2, wherein the arc surface is coincident with the axis of the communication hole (33).

4. The core making process structure of the cover surface core of the vermicular cast iron vertical casting cylinder head as claimed in claim 1, wherein the free surface (32) is outside the peripheral contour of the connecting seat (22).

5. The core making process structure of the cover surface core of the vermicular cast iron vertical casting cylinder cover according to claim 1, wherein the back surface of the riser base core (3) is higher than the highest point of the upper cover surface of the mold (1).