JP7320719B2 - Cast pin for oil return hole for engine block mold - Google Patents

Description

TECHNICAL FIELD The present invention relates to the technical field of engine parts, and more particularly to an oil return hole casting pin for an engine block mold.

At present, China's die-casting mold industry is developing at a high speed, and the total output has increased significantly. The die-casting production process applied in the field is mainly used in the production of engine parts. The engine block is provided with an inclined oil passage and an oil return hole at the mounting position of the crankshaft. This ensures the constant temperature of the oil and the cleanliness of the oil film in the lubrication tank, but the installation of both the inclined oil passage and the oil return hole makes it difficult to cast the block, which is mainly due to the design and fabrication of the mold. reflected in Both the cast pin provided in the inclined oil passage and the core pin provided in the oil return hole are attached to a fixed core at a limited position, the axes of the cast pin and the core pin are on the same plane, and the cast pin and Since the included angle between the axes of the core pins is 36 degrees, in order to install two cast-out pins on the fixed core at the same time, a 36-degree through hole must be provided below the cast-out pin provided in the oil return hole. However, in this way, the cast pin provided in the inclined oil passage is penetrated.

However, conventionally, an internal cooling structure cannot be provided inside the cast pin provided in the oil return hole. The temperature rises above 300 ° C, which causes shrinkage cavities, cracks, voids and aluminum adhesion phenomena in the cast pin and core pin, affecting the life of the cast pin and core pin, and in serious cases , the equipment must be stopped for maintenance, which brings inconvenience to engine manufacturing.

The technical problems to be solved by the present invention are as follows. In the conventional technology, the cast pin of the oil return hole for the engine block mold is not provided with a cooling mechanism, so the cast pin and the core pin have shrinkage cavities, cracks, voids, and aluminum adhesion during the production process. To provide a casting pin for an oil return hole for an engine block mold for solving the problem that a phenomenon is likely to occur.

In order to solve the above-described technical problems, the cast-out pin for the oil return hole for the engine block mold of the present invention is a cast-out pin for the oil return hole for the engine block mold that is attached to a mold body. ,
A base and a mold surface attached to the bottom of the base, wherein the base is provided with a first mounting hole, one end of the mold surface is provided in the first mounting hole, and a core pin is mounted on the base. a water supply and drainage pipe is attached to the mold body, and spaced apart first water supply and first drainage conduits are defined in the base. and, both the first water supply pipeline and the first drainage pipeline are provided apart from the through hole, and the second water supply pipeline and the second water supply pipeline spaced apart are provided in the mold surface portion. of drainage lines are defined,
The water supply and drainage pipe is provided with a first water supply port and a first drainage port, and a cooling water circulation system for supplying cooling water is connected to the first water supply port and the first drainage port, The first water supply pipe line is provided with a second water supply port and a second water discharge port, the first water discharge pipe line is provided with a third water supply port and a third water discharge port, and the The second water outlet and the third water inlet are provided in the first mounting hole, and the first water inlet, the second water inlet, the second outlet, and the second water supply pipeline. , the second drain line, the third water inlet, the third outlet, and the first outlet communicate with each other to form a cooling water circulation path.

Alternatively, the mold face includes a mold face body, a shoulder, and a cold water pipe open at both ends, the shoulder being integrally connected to the tip of the mold face body, and the first attachment. mounted in the hole,
The shoulder and the mold face body are provided with a first cavity and a second cavity communicating with the first cavity, respectively, and the cold water pipe is provided between the first cavity of the shoulder and the mold face body . provided in a second cavity, the cold water pipe is provided with a third cavity serving as the second water supply pipe, the outer wall of the cold water pipe, the inner wall of the mold surface body, and the inner side of the shoulder There is a gap between the wall and it becomes the second drainage pipe,
A fourth drainage port is provided in the outer wall of the shoulder in the circumferential direction, and the fourth drainage port communicates with the third water supply port.

Optionally, a flange is provided on the top of the cold water pipe, the flange is welded to the inner wall of the shoulder, and the water inlet and the fourth outlet of the cold water pipe are located on opposite sides of the flange, respectively. do.

Optionally, the shoulder outer wall has an outer diameter less than the inner diameter of the first mounting hole, and the shoulder outer wall includes a first land spaced from the first land. a second land is provided, wherein both the first land and the second land are engaged with the side wall of the first mounting hole, and the plurality of fourth drain ports are provided in the first mounting hole; It is located between one land and the second land.

Optionally, a plurality of said fourth drainage holes are included, and said plurality of said fourth drainage holes are evenly provided on the outer wall of said shoulder at equal angles.

Optionally, the base is further provided with a positioning hole, the positioning hole is located outside the first mounting hole, and the inner diameter of the positioning hole is larger than the inner diameter of the first mounting hole. .

Alternatively, a third land is further provided on the outer wall of the shoulder, a first waterproof part is provided between the second land and the third land, and the third land and the third land are provided. A second waterproof portion is provided between the mold surface portion main body, and the first waterproof portion and the second waterproof portion abut on the outer wall of the positioning hole.

Alternatively, the tip of the base is provided with a second mounting hole for mounting the water supply and drainage pipe, and the second water inlet and the third water outlet are displaced from each other to form the second mounting hole. A third waterproof part is provided in the hole and on the outer wall of the water supply and drainage pipe, and the third waterproof part is provided between the second water inlet and the third water outlet.

Alternatively, the first waterproof part, the second waterproof part and the third waterproof part are all sealing rings.

Optionally, the length of said cold water pipe is less than the length of said second cavity.

Optionally, said base is molded by 3D printing.

The cast pin for the oil return hole for the engine block mold according to the embodiment of the present invention has the following beneficial effects compared with the prior art.

The casting pin of the oil return hole for the engine block mold according to the embodiment of the present invention includes a first water supply pipeline, a first drainage pipeline, a second water supply pipeline and a second drainage pipeline. By providing, the first water supply port, the first water supply pipe, the second water supply pipe, the second drain pipe and the first drain pipe of the cooling water circulation device are sequentially connected to circulate the cooling water It becomes a channel, whereby the heat generated during casting of the cast pin and the core pin is transferred to the cooling water, and the temperature of the cast pin and the core pin can be lowered.

Both the first water supply line and the second water supply line are spaced apart from the through hole, so that the cooling water can bypass the through hole, thereby avoiding direct contact with the core pin, To reduce the difficulty of producing pins.

Therefore, according to the cast pin for the oil return hole for the engine block mold of the present invention, the surface temperature of the cast pin and the core pin can be effectively lowered and improved. The casting quality of the core pin is excellent, and it has a value for popularization.

It is a schematic diagram of the connection structure of the core pin of the prior art. It is a structural schematic diagram of a core pin of the prior art. FIG. 3 is a schematic diagram showing a connection structure of a core pin, a water supply and drainage pipe, and a mold body according to an embodiment of the present invention; FIG. 3 is another schematic diagram showing the connection structure of the core pin, the water supply and drainage pipe, and the mold body according to the embodiment of the present invention. FIG. 5 is a schematic diagram showing the local structure of FIG. 4; 5 is another schematic diagram showing the local structure of FIG. 4; FIG. 5 is still another schematic diagram showing the local structure of FIG. 4; FIG. It is a schematic diagram which shows the structure of the core pin of the Example of this invention. FIG. 3 is a schematic diagram showing the structure of the cast pin of the embodiment of the present invention when no cold water pipe is attached. It is a schematic diagram which shows the structure of the mold surface part of the Example of this invention. FIG. 4 is a schematic diagram showing the structure of the mold face portion of the example of the present invention when an alternating load is applied.

Form for describing the invention

Specific embodiments of the present invention will be described in more detail below with reference to the drawings and examples. The following examples illustrate the invention without, however, limiting its scope.

In the description of the present invention, terms such as "top", "bottom", "left", "right", "top", and "bottom" refer to orientations or positional relationships shown in the drawings. and is merely for ease of description and explanation of the invention, and does not imply or indicate that such devices or components necessarily have a particular orientation, or are constructed or operated in a particular orientation. It is not meant to be suggestive and therefore cannot be taken as limiting the invention.

As shown in FIGS. 1 and 2, in the prior art, a 36-degree through hole 4 is provided in the lower part of the cast-out pin 50 provided in the oil return hole, so that the core pin 28 provided in the inclined oil passage penetrates. is dressed.

As shown in FIGS. 3-11, a preferred embodiment of the present invention provides an oil return hole cast-out pin for an engine block mold, the oil return hole cast-out pin is a mold It is attached to a main body 1 and includes a base 2 and a mold surface portion 3 attached to the bottom of the base 2. The base 2 is provided with a first mounting hole 5, and one end of the mold surface portion 3 is connected to the first mounting hole 5. A through hole 4 for attaching a core pin 28 is obliquely provided in the base 2, a water supply and drainage pipe 40 is attached to the mold main body 1, and the base 2 includes a spaced apart first A water supply pipeline 6 and a first drainage pipeline 7 are defined, and both the first water supply pipeline 6 and the first drainage pipeline 7 are provided apart from the through hole 4, and the mold surface portion Within 3 are defined a second water supply line 8 and a second water discharge line 9 which are spaced apart.

The water supply and drainage pipe 40 is provided with a first water supply port 10 and a first water discharge port 11, and the first water supply port 10 and the first water discharge port 11 are provided with a cooling water circulation system for supplying cooling water. The first water supply pipe line 6 is provided with a second water supply port 12 and a second water discharge port 13, and the first water discharge pipe line 7 is provided with a third water supply port 14 and a third water discharge port. A water outlet 15 is provided, a second water outlet 13 and a third water inlet 14 are provided in the first mounting hole 5, a first water inlet 10, a second water inlet 12 and a second water outlet. 13, the second water supply pipe 8, the second water discharge pipe 9, the third water supply port 14, the third water discharge port 15 and the first water discharge port 11 communicate with each other to form a cooling water circulation channel. .

Based on the above configuration, the cast pin for the oil return hole for the engine block mold of the embodiment of the present invention includes the first water supply pipe 6, the first water discharge pipe 7, and the second water supply pipe 8. And by providing the second drainage pipeline 9, the first water supply port 10 of the cooling water circulation device, the first water supply pipeline 6, the second water supply pipeline 8, the second drainage pipeline 9 and the first The drain pipe 7 is sequentially connected to form a cooling water circulation path, whereby the heat generated during casting of the cast pin and the core pin 28 is transferred to the cooling water, and the temperature of the cast pin and the core pin 28 is lowered. be able to.

Since both the first water supply pipe 6 and the second water supply pipe 8 are provided apart from the through hole 4 , the cooling water can bypass the through hole 4 , thereby allowing direct contact with the core pin 28 . Avoiding contact and facilitating pin manufacturing.

Therefore, the cast pin of the oil return hole for the engine block mold of the present invention can effectively reduce and improve the surface temperature of the cast pin and the core pin 28, thereby The casting quality of 28 is excellent, and there is a popularization value.

In this embodiment, as shown in FIGS. 3 to 11, the mold surface 3 is formed by a mold surface main body 31, a shoulder 32, and a and a cold water tube 33 open at both ends, the shoulder 32 is integrally connected to the tip of the mold face body 31 and mounted in the first mounting hole 5 .

The shoulder 32 and the mold face body 31 are provided with a first cavity and a second cavity 16 communicating with the first cavity, respectively. A third cavity is provided in the second cavity 16 and the cold water pipe 33 is provided with a third cavity serving as the second water supply pipe 8. There is a gap between the inner wall and the second drain pipe 9 .

A fourth drain port 17 is provided in the outer wall of the shoulder 32 in the circumferential direction, and each fourth drain port 17 communicates with the third water supply port 14 . Specifically, by providing the first cavity and the second cavity 16, a space for accommodating the cold water pipe 33 can be provided by the first cavity and the second cavity 16, and the second drainage By providing the pipeline 9, in addition to ensuring the structural integrity of the second drainage pipeline 9, the second drainage pipeline 9 is skillfully provided, the difficulty of processing is low, and the cooling water distribution becomes easier.

By providing the fourth drain port 17 so that the two open ends of the fourth drain port 17 communicate with the third water supply port 14 and the second drain pipe line 9 respectively, the second Communication between the drain line 9 and the first drain line 7 is facilitated.

The second water supply pipe 8 and the second water discharge pipe 9 are separated by the cold water pipe 33, and the cooling water can flow along a certain flow trajectory, ensuring a stable flow of the cooling water. Here, as a trajectory along which the cooling water flows from the first water supply pipe 6 to the first water discharge pipe 7, the cooling water flows sequentially from the second water discharge port 13 of the first water supply pipe 6 to the cold water pipe. It flows to the first drain port 11 via the water inlet of 33 , the outlet of the cold water pipe 33 , the second drain line 9 , and the fourth outlet 17 .

In this embodiment, as shown in FIGS. 6, 10 and 11, a flange 18 is provided at the top of the cold water pipe 33, the flange 18 is welded to the inner wall of the shoulder 32, and the water inlet of the cold water pipe 33 and the plurality of fourth The water outlets 17 are located on both sides of the flange 18, and the water inlet of the cold water pipe 33 can be well isolated from the plurality of fourth water outlets 17 by the flange 18. Avoid direct communication with the fourth drain port 17 and avoid cooling water being supplied to the water inlet of the cold water pipe 33 at the same time as being supplied to the fourth drain port 17 .

In this embodiment, as shown in FIGS. 8 to 11, the outer diameter of the outer wall of the shoulder 32 is smaller than the inner diameter of the first mounting hole 5 in order to facilitate attachment and detachment of the base 2 and the mold surface 3. , the outer wall of the shoulder 32 is provided with a first land 19 and a second land 20 spaced apart from the first land 19, the first land 19 and the second land 20 being are also engaged with the side walls of the first mounting hole 5 , and the plurality of fourth drain holes 17 are located between the first land 19 and the second land 20 . Here, since the alternating load does not act on the base 2, the base 2 can be used for a long period of time and does not require periodic replacement. The face portion 3 requires periodic replacement. Thus, by detachably connecting the base 2 and the mold face 3, a design is realized that allows complete interchangeability between the base 2 and the mold face 3, thereby eliminating the cost of replacing the cast pin. Lower. Specifically, the detachable connection between the base 2 and the mold surface portion 3 is when the first land 19 and the second land 20 are engaged with the side walls of the first mounting hole 5 . is firmly connected to the mold face 3 and the base 2 is separated from the mold face 3 when the first land 19 and the second land 20 are separated from the sidewall of the first mounting hole 5 .

Since the outer diameter of the outer wall of the shoulder 32 is less than the inner diameter of the first mounting hole 5, the gap between the outer wall of the shoulder 32 and the first mounting hole 5 is annular, and further the outer wall of the shoulder 32 is provided with at least two fourth drains 17 through which cooling water exiting the second drain line 9 passes in turn through each fourth drain 17 to the outer wall of the shoulder 32 and the first mounting hole. 5, thus increasing the circulation efficiency of the cooling water between the second drain line 9 and the first drain line 7.

In this embodiment, as shown in FIG . 9 , the base 2 is further provided with a positioning hole 21, the positioning hole 21 is positioned outside the first mounting hole 5, and the inner diameter of the positioning hole 21 is the first mounting hole. It is larger than the inner diameter of the mounting hole 5. Here, the positioning holes 21 facilitate rough positioning when assembling the base 2 and the mold surface 3, and further enable the base 2 and the mold surface 3 to be assembled quickly.

In this embodiment, as shown in FIG. 10 , a third land 22 is further provided on the outer wall of the shoulder 32 to enhance the waterproof effect between the shoulder 32 and the base 2, and a second land 20 and the third land 22, a second waterproof portion 24 is provided between the third land 22 and the mold surface body 31, and the first waterproof portion 23 And the second waterproof part 24 contacts the outer wall of the positioning hole 21 . Specifically, the first waterproof portion 23 and the second waterproof portion 24 can prevent the coolant from flowing out from the shoulder 32 and the base 2 , thereby preventing the coolant from flowing between the base 2 and the mold surface 3 . flow between them is ensured. Preferably, the first waterproof part 23 and the second waterproof part 24 are seal rings with good sealing properties.

In this embodiment, as shown in FIG. 9, the tip of the base 2 is provided with a second mounting hole 27 for mounting a water supply/drainage pipe 40, and the second water supply port 12 is connected to the third water discharge port 15. A third waterproof part 25 is provided in the second mounting hole 27 apart from and on the outer wall of the water supply/drainage pipe 40. The third waterproof part 25 includes the second water supply port 12 and the third is arranged between the drain port 15 of the Here, the third waterproof part 25 can prevent the coolant from flowing directly between the second water supply port 12 and the third drain port 15, thereby allowing the coolant to flow through a predetermined flow path. ensured to flow along.

A plurality of fourth waterproof parts 26 are further provided at the front end portion of the third drain port 15 of the water supply and drainage pipe 40 , and the fourth waterproof part 26 allows the cooling liquid to flow to the outside from the second mounting hole 27 . Preferably, the third waterproof part 25 and the fourth waterproof part 26 are seal rings having good sealing properties.

In this embodiment, the length of the cold water pipe 33 is less than the length of the second cavity 16 , as shown in FIGS. It is flush and there is a certain gap between the outlet of the cold water pipe 33 and the bottom of the second cavity 16 , thus allowing the coolant to flow from the outlet of the cold water pipe 33 into the second cavity 16 . Easier to drain.

In this embodiment, as shown in FIGS. 3-11, the base 2 is molded by 3D printing to ensure the structural integrity of the through-hole 4, as well as the first water supply line 6 and the first water discharge line. The path 7 can bypass the through-hole 4 , thereby ensuring the structural strength of the base 2 , reducing the weight of the base 2 , and reducing the difficulty of processing the base 2 .

In this embodiment, as shown in FIGS. 3 and 4, the water supply/drainage pipe 40 is fixed to the mold body 1 by the platen 30 and the push rod 29, so that the water supply/drainage pipe 40 can be stably installed.

In this embodiment, as shown in FIG. 11, the mold surface portion 3 is a portion that receives an alternating load, and the alternating load acts on a portion of the side surface of the mold surface portion 3 along a predetermined direction. Shrinkage occurs in the side surface of the surface portion 3 that receives the alternating load, and as a result, a part of the side surface of the mold surface portion 3 is worn in the radial direction. As shown in the drawing, if an alternating load acts on the upper surface of the mold surface 3 along a predetermined direction, the mold surface 3 is rotatably connected to the base 2, so that the operator can perform the next die casting. In the work, by rotating the lower side surface of the mold surface portion 3 (of course, it may be a side surface other than the lower surface of the mold surface portion 3) to the point of action facing the alternating load, the mold surface portion 3: The side surface on which the alternating load acts is different every die casting, thereby balancing wear and tear of the mold surface part 3, prolonging the life of the mold surface part 3, and reducing the cost for exchanging the mold surface part 3.例文帳に追加

In this embodiment, as shown in FIGS. 3-11, the method of connection between the core pin of the present invention, the water supply/drainage pipe 40 and the mold body 1 is as follows.

S1, welding the cold water pipe 33 into the first cavity;

S2, the first waterproof part 23 and the second waterproof part 24 are fitted over the shoulder 32, and the shoulder 32 is installed in the first mounting hole 5, thereby connecting the mold surface part 3 and the base 2;

S3, the assembled cast pin is mounted in the mold main body 1 .

S4, the third waterproof part 25 and the fourth waterproof part 26 are fitted onto the water supply/drainage pipe 40, and the water supply/drainage pipe 40 is attached to the second mounting hole 27;

S5, the platen 30 and the push rod 29 press the water supply and drainage pipe 40 into the mold main body 1. As shown in FIG.

The above are only preferred embodiments of the present invention, and those skilled in the art can make multiple improvements and replacements without departing from the technical principles of the present invention. should be within the scope of the patent.

1 mold body 2 base 3 mold surface 31 mold surface main body 32 shoulder 33 cold water pipe 4 through hole 5 first mounting hole 6 first water supply pipe 7 first drainage pipe 8 second water supply pipe 9 second 2 drain pipes 10 first water inlet 11 first drain 12 second water inlet 13 second outlet 14 third water inlet 15 third outlet 16 second cavity 17 fourth Drain port 18 Flange 19 First land 20 Second land 21 Positioning hole 22 Third land 23 First waterproof part 24 Second waterproof part 25 Third waterproof part 26 Fourth waterproof part 27 Second waterproof part Mounting hole 28 Core pin 29 Push rod 30 Platen 40 Water supply and drainage pipe 50 Cast pin

Claims (10)

A casting pin for an oil return hole for an engine block mold attached to a mold body,
a base and a mold surface attached to the bottom of the base, the base having a first mounting hole, the base having an inclined through-hole for mounting a core pin, and the mold surface is provided in the first mounting hole , the mold surface portion is detachably and rotatably connected to the base, a water supply and drainage pipe is attached to the mold body, and a spaced apart and a first water supply line and a first water discharge line are defined, and both the first water supply line and the first water discharge line are spaced from the through hole. a spaced second water supply line and a second water discharge line defined within the mold face;
The water supply and drainage pipe is provided with a first water supply port and a first drainage port, and a cooling water circulation system for supplying cooling water is connected to the first water supply port and the first drainage port, The first water supply pipeline is provided with a second water supply port and a second drainage port, the first drainage pipeline is provided with a third water supply port and a third drainage port, and the The second water outlet and the third water inlet are provided in the first mounting hole, and the first water inlet, the second water inlet, the second outlet, and the second water supply pipeline. , the second drain pipe, the third water supply port, the third drain port, and the first drain port communicate with each other to form a cooling water circulation path. Cast pin for oil return hole for mold. The mold surface includes a mold surface body, a shoulder, and a cold water pipe with both ends open, the shoulder being integrally connected to the tip of the mold surface body and mounted in the first mounting hole,
The shoulder and the mold face body are provided with a first cavity and a second cavity communicating with the first cavity, respectively, and the cold water pipe is provided between the first cavity of the shoulder and the mold face body. provided in a second cavity, the cold water pipe is provided with a third cavity serving as the second water supply pipe, the outer wall of the cold water pipe, the inner wall of the mold surface body, and the inner side of the shoulder There is a gap between the wall and it becomes the second drainage pipe,
2. The engine block metal according to claim 1, wherein a fourth drain port is provided in the outer wall of the shoulder in the circumferential direction, and the fourth drain port communicates with the third water inlet. Cast pin for oil return hole for mold. A flange is provided on the top of the cold water pipe, the flange is welded to the inner wall of the shoulder, and the water inlet and the fourth outlet of the cold water pipe are located on opposite sides of the flange, respectively. A cast pin for an oil return hole for an engine block mold according to claim 2. The outer wall of the shoulder has an outer diameter less than the inner diameter of the first mounting hole, and the outer wall of the shoulder has a first land and a second land spaced from the first land. a land, wherein the first land and the second land are both engaged with the side wall of the first mounting hole, and the plurality of fourth drain ports are connected to the first land and the 4. A cast pin for an oil return hole for an engine block mold according to claim 3, characterized in that it is located between the second land. 5. The engine block mold according to claim 4, further comprising a plurality of said fourth drainage ports, wherein said plurality of said fourth drainage ports are evenly provided on an outer wall of said shoulder at equal angles. Cast pin for oil return hole. The base is further provided with a positioning hole, the positioning hole is positioned outside the first mounting hole, and the inner diameter of the positioning hole is larger than the inner diameter of the first mounting hole. A cast pin for an oil return hole for an engine block mold according to claim 5. A third land is further provided on the outer wall of the shoulder, a first waterproof part is provided between the second land and the third land, and the third land and the mold face main body are provided. 7. The engine block mold according to claim 6, wherein a second waterproof part is provided between the first waterproof part and the second waterproof part, and the first waterproof part and the second waterproof part are in contact with the outer wall of the positioning hole. Cast pin for oil return hole. The tip of the base is provided with a second mounting hole for mounting the water supply and drainage pipe, the second water supply port and the third drainage port are displaced from each other and provided in the second mounting hole, A third waterproof part is provided on an outer wall of the water supply and drainage pipe, and the third waterproof part is provided between the second water supply port and the third drainage port. Item 8. A cast pin for an oil return hole for an engine block mold according to Item 7. 9. The oil return hole for the engine block mold according to claim 8, wherein the first waterproof part, the second waterproof part, and the third waterproof part are all seal rings. cast pin. The cast pin of oil return hole for engine block mold according to claim 2, wherein the base is molded by 3D printing.