KR101651971B1 - Valve housing forming apparatus of EGR valve assembly - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve housing molding apparatus for an EGR valve assembly, and more particularly, to a valve housing molding apparatus for an EGR valve, which re-introduces exhaust gas of a vehicle into a combustion chamber of an engine to suppress generation of nitrogen oxides To an apparatus for forming a valve housing of an EGR valve assembly to be molded.

Description

[0001] The present invention relates to a valve housing forming apparatus for an EGR valve assembly,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve housing molding apparatus for an EGR valve assembly, and more particularly, to a valve housing molding apparatus for an EGR valve, which re-introduces exhaust gas of a vehicle into a combustion chamber of an engine to suppress generation of nitrogen oxides To an apparatus for forming a valve housing of an EGR valve assembly to be molded.

Generally, the exhaust gas of an automobile is compressed in a cylinder at a high temperature and a high pressure in a cylinder, then expanded and then discharged to the atmosphere through an exhaust manifold. Such exhaust gas includes carbon monoxide (CO), hydrocarbons HC), and nitrogen oxides (NOx).

Here, the nitrogen oxide is a harmful substance generated in the combustion process at a high temperature. In the related art, an exhaust gas recirculation system (EGR) valve for re-introducing a part of the exhaust gas discharged from the vehicle into the combustion chamber of the engine is installed in each vehicle , An appropriate amount of exhaust gas is introduced into the combustion chamber of the engine to lower the combustion temperature of the engine to reduce the generation of nitrogen oxides.

Wherein the EGR valve includes a valve housing having an intake port through which exhaust gas is introduced and an exhaust port through which the exhaust gas flowing along the intake port flows through the intake manifold of the engine; And a valve member for setting an opening and closing state of an intake port formed in the valve housing.

Here, the valve member includes an actuator, and a valve piece for ascending and descending by driving of the actuator and setting the opening and closing amount of the intake port and the opening and closing state.

Further, in the related art, a valve housing is formed through a die casting molding method in which a melt is injected into a molding space at a high pressure, and then a valve seat portion of the valve housing is finely cut to form a flat valve seat portion.

The valve seat including the valve seat portion is made of zinc or an aluminum alloy material having a relatively low strength as compared with the valve seat, The valve seat portion is worn out due to repetitive friction with the member, so that a stable airtightness can not be ensured.

SUMMARY OF THE INVENTION It is an object of the present invention which is devised to overcome the above-mentioned problems to provide a fixing structure for inserting a unique type of seat ring member in a molding space formed between a fixed type and a movable type, In addition, by forming the valve seat portion in which the seat ring member is constrained so as to be shaped in the valve housing formed therewith, it is possible to minimize the occurrence of defects and the occurrence of defects due to fabrication through deletion of the post- And to provide a valve housing molding apparatus for an EGR valve assembly capable of increasing the uniformity of the quality of the valve housing and the durability of the valve housing.

The above object is achieved by the following constitutions provided in the present invention.

The valve housing forming apparatus of an EGR valve assembly according to the present invention comprises:

A fixed mold having a molding groove communicating with an injection port on an opposite surface; And a movable mold having a molding groove formed on an opposite surface to form a closed molding space through close contact with the stationary mold, the valve housing molding apparatus comprising:
The movable die includes a first sliding core having a connecting piece of the seat ring member restrained to the head to enter longitudinally into the molding space portion;
A second sliding core for restricting the seat ring of the seat ring member, which has entered into the molding space portion by the first sliding core, into the head while entering the molding space in the lateral direction,

The seat ring member includes a plate member formed by bending a connecting piece on one side of the seat ring,

delete

The seat ring member is configured so as to be interposed within the molding space by the first sliding core and the second sliding core to prevent displacement of the molding space by the melt injected at a high pressure.

Preferably, an assembly pin is formed on the head of the first sliding core, and an assembly hole is formed in the connection piece of the seat ring member. The first sliding core penetrates and constrains the assembly pin to the assembly hole of the connection piece, In the longitudinal direction.

More preferably, a through-pin is formed in the head portion of the second sliding core so as to penetrate and seat the seat ring of the seat ring member longitudinally introduced into the molding space portion by the first sliding core,

The seat ring member longitudinally restrained in the longitudinal direction by the first sliding core and longitudinally restrained by the first sliding core rotates transversely in the forming space portion, Direction.

The seat ring member is composed of a plate-like body having seat rings integrally formed at both ends of the connecting piece, and the second sliding core sequentially penetrates a pair of spaced apart seat rings to restrain the seat ring member in the lateral direction .

The piston of the hydraulic cylinder constrained to the outer wall of the movable type is coupled to the rear of the first sliding core and the second sliding core to move into and out of the molding space due to advance and retreat of the piston.

As described above, according to the present invention, in molding the valve housing for the EGR valve assembly into which the seat ring member is inserted by inserting the seat ring member into the molding space portion, it is possible to improve the shape and structure of the seat ring member, A restricting structure for restricting the ring member to the shaping space portion in a regular manner is provided.

That is, in the present invention, the seat ring member is constituted by a plate shaped body having a seat ring formed at both ends of a connecting piece, and a sliding core for restraining the seat ring member in the longitudinal direction and the transverse direction is disposed Thus, the seat ring member is restrained in a regular manner.

With this configuration, the phenomenon that the seat ring member is released from the correct position by the melt to be injected at a high pressure is prevented, and as a result, the uniformity of the quality of the valve housing constituted thereby is secured.

Particularly, the seat ring is formed with a pair of seat rings spaced from each other, and it is possible to eliminate a post-process in which the formed sheet portion is separately formed through a post-process.

Fig. 1 shows the overall configuration of a valve housing molding apparatus of an EGR valve assembly proposed as a preferred embodiment in the present invention,
FIG. 2 is a plan view of a movable mold of an apparatus for molding a valve housing of an EGR valve assembly proposed as a preferred embodiment of the present invention,
Fig. 3 shows the forward and backward movement of the auxiliary sliding core provided in the valve housing forming apparatus of the EGR valve assembly proposed as a preferred embodiment of the present invention,
4 shows the detailed configuration and operation state of the 'A' portion in FIG. 2,
5 is a partial cutaway view showing the internal configuration of the valve housing of the EGR valve assembly formed by the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus for forming a valve housing of an EGR valve assembly according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the overall structure of a valve housing molding apparatus of an EGR valve assembly proposed as a preferred embodiment of the present invention. FIG. 2 shows a valve housing molding apparatus for an EGR valve assembly proposed in the preferred embodiment of the present invention FIG. 3 shows the forward and backward movement of the auxiliary sliding core provided in the valve housing forming apparatus of the EGR valve assembly proposed in the preferred embodiment of the present invention, and FIG. 4 is a cross- FIG. 5 is a partial cutaway view showing the internal structure of the valve housing of the EGR valve assembly formed by the present invention. FIG.

1 and 3, the valve housing molding apparatus 1 of the EGR valve assembly according to the present invention includes a stationary mold 10 having a molding groove 11 communicating with an injection port 12 formed on an opposite surface thereof; And a movable mold 20 having a molding groove 21 formed on an opposing face to form a closed molding space S through a close contact with the fixed mold 10, The valve housing 100 is formed by curing the molten material entering into the valve body S.

In this embodiment, the seat ring member 110 is inserted into the molding space S so that the seat ring member 110 is inserted into each valve seat portion 101 of the valve housing 100.

Particularly, in the present embodiment, in inserting the seat ring member 110 into the molding space S, the shape of the improved seat ring member 110 and the constraining structure for restraining the shape of the seat ring member 110 So that the valve housing 100 including the valve housing 100 can be stabilized.

That is, in the present invention, as described later, the seat ring member 110 is shaped and fixed by the first sliding core 22 and the second sliding core 23 in an alternating structure, Thereby preventing the sheet ring member 110 from being displaced from the predetermined position due to the injection pressure of the melt W to be supplied.

The seat ring member 110 is composed of a plate member in which a connecting piece 111 bent in one piece of the seat ring 112 is integrally formed as shown in FIG. 4B and FIG. 5. In this embodiment, Shaped plate member in which a seat ring 112 is integrally formed.

The sheet ring member 110 may be formed by cutting a plate through laser cutting, then bending the sheet metal through a bending process, or molding by a pressing process including blanking, piercing, and bending processes.

As shown in FIG. 2, the movable die 20 includes a first sliding core 22 that restrains the connecting piece 111 of the seat ring member 110 to the head and enters longitudinally into the molding space S; A seat ring 112 of the seat ring member 110 which has entered the molding space S by the first sliding core 22 while entering the molding space S in the lateral direction, 2 sliding cores 23 are disposed.

The piston 25a of the hydraulic cylinder 25 constrained to the outer wall of the movable die 20 is coupled to the rear of the first sliding core 22 and the second sliding core 23, (25a) to advance and retract into the molding space (S).

2 and 4a and 4b, an assembly pin 22a is formed on the head of the first sliding core 22 and an assembly hole 111a is formed in the connection piece 111 of the seat ring member 110. [ The first sliding core 22 penetrates and constrains the assembly pin 21a formed on the head portion to the assembly hole 111a of the connecting piece 111 to enter the molding space S in the longitudinal direction.

4b, the connecting piece 111 of the seat ring member 110 is connected to the connecting pin 111 of the first sliding core 22, And is assembled in a set direction in a square shape on the head of the second sliding core 23. [

The annular elastic boding ring 22a-a made of a steel sheet material is formed on the assembly pin 22a and the seat ring member 22a-a penetrating the assembly pin 22a by the elastic boding ring 22a- The connecting piece 111 of the first sliding core 22 is fixed to the first sliding core 22 and prevented from being detached from the assembly pin 22a in the process of entering the molding space S. [

A seat ring 112 of the seat ring member 110 longitudinally entered into the molding space S is formed in the head portion of the second sliding core 23 disposed to intersect with the first sliding core 22 And the through hole 23a is formed in the seat ring 112 of the seat ring member 110 longitudinally inserted into the forming space S by the first sliding core 22, (23a) and restrains the seat ring member (110) in the lateral direction.

At this time, the seat ring member 110 has a seat ring 112 integrally formed at both ends of the connecting piece 111, and the second sliding core 23 has a pair of seat rings 112 spaced apart from each other. So as to confine the seat ring member 110 in the transverse direction at two points.

The movable die 20 is formed with a press-fit groove 27a for press-fitting the through-pin 23a of the second sliding core 23, which sequentially passes through the connecting pieces 111 of the seat ring member 110, The press-fit support core 27 which is introduced into the molding space S by the hydraulic cylinder 25 is disposed and fixed to the through hole 23a through the connecting piece 111 of the seat ring member 110 Thereby suppressing the occurrence of warpage of the through-pin 23a, and allowing the sheet ring member to be shaped and constrained by the through-pin.

Therefore, the seat ring member 110, which has entered the forming space S, is restricted in the longitudinal direction to the first sliding core 22, Is constrained at two points in the transverse direction by the elastic member 23 so as to be crossed within the molding space S.

Thus, the seat ring member 110, which has entered the molding space S, is prevented from being displaced from the fixed position by the melt W flowing at high pressure along the injection port 12 formed in a fixed shape, It is possible to form the valve housing 1 in which the seat ring member 110 is stably inserted.

The seat ring member 110 restrained by the valve housing 100 is formed of a plate shaped body having a seat ring 112 integrally formed at both ends of the connecting piece 111. The valve ring 100 includes a valve housing 100, And is inserted into each valve seat portion 101 of the valve body 101 in a regular manner.

As shown in FIGS. 2 and 3, the auxiliary sliding core 24 is disposed in the movable die 20 in a forward and backward movement structure. The auxiliary sliding cores 24 support the seat ring member 110 in the molding space portion When the first sliding core 22 and the second sliding core 23 entering and constraining the first sliding core 22 and the second sliding core 23 enter the molding space S, ) And the second sliding core (23).

According to the present embodiment, the first sliding core 22, the second sliding core 23, and the press-fit support core 27 are configured to move forward and backward by the drive of the hydraulic cylinder 25, (24) move forward and backward in cooperation with the movable die (20) which is in close contact with the fixed die.

In the drawing, a piston (not shown) of the hydraulic cylinder 25 constrained to the outer wall of the movable die 20 is provided at the rear of the first sliding core 22, the second sliding core 23, 25a are engaged with each other, so that the piston 25a moves forward and backward in the molding space S by advancing and retracting.

3, an inclined guide structure including an inclined groove 24a and an inclined fin 13 is formed between the auxiliary sliding core 24 and the stationary die 10 disposed in the movable die 20 in a forward / The auxiliary sliding core 24 disposed in the movable die 20 is retracted to the outside of the forming space S when the movable die 20 is separated from the fixed die 10 and the movable die 20 is fixed 10, it is allowed to enter the molding space S.

At this time, a trailing spring portion 26 for pulling the auxiliary sliding core 24 to the inside of the movable die is formed at the rear of the auxiliary sliding core 24 exposed to the outside of the movable die 20, 24 are caused to be elastically pulled into the molding space S by the elastic traction force provided by the traction spring portion 26.

The first sliding core 22 and the second sliding core 23 sequentially move into the molding space S by driving the hydraulic cylinder 25 and then the auxiliary sliding cores 24, Are sequentially introduced into the molding space S by the inclined guide structure.

At this time, since the auxiliary sliding cores 24 always form a stable adhered state to the inclined fins 13 by the elastic pulling force provided by the pulling spring portion 26, the contact between the movable die 20 and the fixed die 10 It is possible to carry out the sliding movement which is shaped according to the movement of the movable die 20 and the stationary die 10,

In the state where the movable die 20 is separated from the stationary die 10 and the forming space S is opened, the worker moves the first sliding core 22, And the connecting piece 111 of the seat ring member 110 having the assembly hole 111a formed therein is inserted into the assembly pin 22a formed on the head of the seat assembly.

In this state, the first sliding core 22 enters the molding space S in the longitudinal direction by the sequential driving of the hydraulic cylinders 25, and then the second sliding core 23 moves to the molding space S And the seat ring member 110 sequentially passes through the seat ring 112 of the seat ring member 110 in which the connecting piece 111 is restrained by the first sliding core 22 so that the seat ring member 110 is moved in the lateral direction Restraint.

That is, the seat ring member 110, which has entered the forming space S, is restrained in the longitudinal direction of the first sliding core 22 in the longitudinal direction, The seat ring member 110 is constrained to intersect the molding space S by two points in the transverse direction by the elastic member 23.

At this time, the end portion of the through-pin 23a, which is fixed through the connecting piece 111 of the seat ring member 110, is pressed by the hydraulic cylinder 25 into the press-fit groove 27a To support the end portion of the through pin 23a of the second sliding core 23 which passes through the connecting pieces 111 of the seat ring member 110 in order and suppresses the occurrence of warping of the through pin And a phenomenon in which the seat ring member 110 fixed thereto is released from the correct position.

The movable mold 20 is closed by closing the molding space S while being in close contact with the stationary mold 10 and is injected into the closed molding space S through the injection port 12 of the stationary mold 110, The melt W is introduced and cured.

At this time, the seat ring member 110, which has entered the molding space S, is constrained so as to intersect with the first sliding core 22 and the second sliding core 23, It is possible to prevent the phenomenon of deviation from the correct position by the melt W injected at high pressure along the valve seat 12 and consequently to form the valve housing 100 in which the seat ring member 110 is stably inserted.

After the molding of the valve housing 100 in which the seat ring member 110 is inserted into the molding space S is completed, the movable mold 20 is separated from the stationary mold 10, And the valve housing 100 in which the seat ring member 110 is inserted is elevated by a demoulding pin EP which is disposed on the movable die 20 in an ascending and descending structure to enter and exit the forming groove 21, And is demarcated in the space portion S.

1. Valve housing forming device of EGR valve assembly
10. Fixed type 11. Molding groove
12. Inlet 13. Inclined pin
20. Movable Type 21. Molding Grooves
22. First sliding core 22a. Assembly pin
22a-a. Elastic bonding
23. Second sliding core 23a. Through pin
24. Auxiliary sliding core 24a. Oblique groove
25. Hydraulic cylinder 25a. piston
26. Traction spring portion 27. Press-fit support core
27a. Press-fit groove
100. Valve housing 101. Valve seat portion
110. The seat ring member
111. Connection 111a. Assembly
112. Seat ring 112a. Inflow groove

Claims (5)

A fixed mold having a molding groove communicating with an injection port on an opposite surface; And a movable mold having a molding groove formed on an opposite surface to form a closed molding space through close contact with the stationary mold, the valve housing molding apparatus comprising:
The movable die includes a first sliding core having a connecting piece of the seat ring member restrained to the head to enter longitudinally into the molding space portion;
A second sliding core for restricting the seat ring of the seat ring member, which has entered into the molding space portion by the first sliding core, into the head while entering the molding space in the lateral direction,
The seat ring member includes a plate member formed by bending a connecting piece on one side of the seat ring,
Wherein the seat ring member is configured so as to be interdigitated in the molding space by the first sliding core and the second sliding core so as to be prevented from being displaced by the melt injected at a high pressure in the molding space portion. Valve housing molding device. The seat assembly of claim 1, wherein an assembly pin is formed on a head portion of the first sliding core, and an assembly hole is formed in a connection piece of the seat ring member. The first sliding core penetrates and constrains the assembly pin to the assembly hole of the connection piece, Wherein the valve housing is configured to enter longitudinally into the molding space. [2] The apparatus according to claim 1, wherein a through-pin is formed in a head portion of the second sliding core so as to penetrate and seat the seat ring of the seat ring member longitudinally introduced into the forming space portion by the first sliding core,
The seat ring member longitudinally restrained in the longitudinal direction by the first sliding core and longitudinally restrained by the first sliding core rotates transversely in the forming space portion, So as to be confined in a predetermined position of the molding space. The seat according to claim 1 or 3, wherein the seat ring member is composed of a plate-like body having seat rings integrally formed at both ends of a connecting piece, and the second sliding core sequentially passes a pair of seat rings spaced apart Wherein the valve member is configured to restrain the seat ring member in the transverse direction. [2] The apparatus of claim 1, wherein a piston of a hydraulic cylinder constrained to a movable outer wall is coupled to the rear of the first sliding core and the second sliding core to advance and retreat into and out of the molding space by advancing and retreating the piston The valve housing forming device of the EGR valve assembly.

Images