Punch structure of die-casting machine

Abstract

The die-casting machine punch structure comprises a charging barrel and a punch which are matched with each other, an annular clamping groove is formed in the front portion of the punch, the punch is connected with a first lantern ring through the annular clamping groove, the first lantern ring is of an open-loop structure, the outer diameter of the first lantern ring is larger than the inner diameter of the charging barrel, and one end of the first lantern ring exceeds the front end of the punch; a plurality of mounting holes are formed in the side face of the punch, the punch is movably connected with a lubricating spray head through the mounting holes, an annular cavity is formed in the position, corresponding to the mounting holes, in the punch and can be communicated with the lubricating spray head, an oil inlet channel and an oil inlet pipe are connected to the annular cavity, and a cooling water channel is formed in the inner side of the front end of the punch. During use, molten metal enters the opening of the first lantern ring under the pressure of the first lantern ring, so that the first lantern ring is opened, and the sealing performance of the punch and the charging barrel is guaranteed; and by arranging the lubricating spray head and the cooling water channel, the side, making contact with the high temperature, of the punch can be cooled, the cooling effect is improved, and the service life of the punch is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of die-casting machine accessories, and in particular to a die-casting machine punch structure. Background Art

[0002] A die-casting machine is a machine that uses pressure for casting. It consists of a hot press chamber and a cold press chamber. It can be divided into two types according to its structure: vertical and horizontal. The main die-casting process is carried out in a high-temperature closed environment.

[0003] The die-casting punch is a matching metal part installed on the die-casting machine. It is used to cooperate with the injection chamber to allow molten high-temperature aluminum water to enter the mold, thereby die-casting. During the die-casting process, the barrel and the punch are in direct contact with the high-temperature molten metal, and the heat is concentrated. Long-term high-temperature working environment will reduce the service life of the punch. Therefore, a cooling structure needs to be set in the punch; at the same time, the gap between the punch and the barrel and the lubrication between the punch and the barrel need to be considered to prevent the aluminum liquid from leaking from the punch end to the rear, affecting the punch effect.

[0004] There are some punch structures that can be cooled in the prior art. For example, the Chinese patent with authorization announcement number CN216729470U and publication date August 23, 2021 discloses a ring-sleeve sealing punch for high vacuum die-casting; it includes copper ring A, a punch body, a punch joint, a water dividing block, and copper ring B. The copper ring A is stretched open by a caliper and put into the corresponding groove of the punch body; a gap is provided between the copper ring A and the punch body; the punch joint is respectively connected to the punch body and the water dividing block by threads; the copper ring B is stretched open by a caliper and put into the corresponding groove of the punch body.

[0005] The above application is to eliminate the tolerance between the punch and the material cup under the premise of ensuring smooth injection of the punch, to prevent air leakage due to the gap between the punch and the material cup during the vacuum pumping process of die casting, and to prevent the vacuum value in the cavity from failing to meet the standard, resulting in internal pores in the casting and blistering after heat treatment. By setting an open copper ring A, the high-temperature molten metal can enter the opening during the injection process to open the copper ring, thereby ensuring the sealing effect between the punch and the material cup. At the same time, a copper ring B is provided to ensure the alignment and coaxiality of the punch and the material cup. With respect to the above-mentioned related technologies, the inventor believes that although the application can ensure the sealing effect, the installation of its copper ring is very inconvenient, and the punch in the application is drip-lubricated, and the lubricating oil can easily enter the notch on the copper ring, resulting in uneven lubrication and poor effect. Therefore, it is necessary to design a die-casting machine punch structure with good cooling effect, uniform lubrication and easy replacement of copper rings. Utility Model Content

[0006] The present application provides a copper ring die-casting machine punch structure with good cooling effect, uniform lubrication and easy replacement.

[0007] The present application provides a die-casting machine punch structure adopting the following technical solution:

[0008] A die-casting machine punch structure includes a barrel and a punch that cooperate with each other, a front portion of the punch is provided with an annular groove and is connected to a first ring through the annular groove, the first ring is an open-loop structure and the outer diameter of the first ring is larger than the inner diameter of the barrel, one end of the first ring extends beyond the front end of the punch, a plurality of mounting holes are provided on the side of the punch and a lubricating spray head is movably connected to the mounting holes, an annular cavity is provided at a position corresponding to the mounting hole inside the punch and the annular cavity can be connected to the lubricating spray head, an oil inlet channel and an oil inlet pipe are connected to the annular cavity, and a cooling water channel is provided on the inner side of the front end of the punch.

[0009] Preferably, the punch is a hollow sleeve structure, the front end edge of the punch is provided with a rounded corner, the first ring is annular, and the inner side of the other end of the first ring is provided with a convex portion corresponding to the annular groove, the middle part of the first ring is disconnected and the two sides of the disconnection are staggered with protrusions, and a distance is provided between the protrusion and the other side.

[0010] Preferably, a second ring is clamped in the middle of the punch, the second ring is an open ring structure, the second ring is concentrically arranged with the first ring and the length of the second ring is greater than the length of the first ring.

[0011] Preferably, an annular portion is provided between the first ring and the second ring, the mounting hole is circumferentially provided on the annular portion, a thread is provided in the mounting hole and is connected to the lubricating spray head through the thread, the lower part of the lubricating spray head is a conical structure and a sealing ring is provided at the lower part of the lubricating spray head.

[0012] Preferably, a positioning hole is provided on the second collar, and a positioning protrusion matching the positioning hole is provided in the middle of the punch. When the positioning hole and the positioning protrusion cooperate, the open loop position on the second collar is set downward.

[0013] Preferably, the first ring and the second ring are both made of beryllium copper alloy material.

[0014] Preferably, a polygonal clamping protrusion is provided on the outer side of the end of the punch, a step is provided on the inner side of the end, and a connecting thread is provided at the end of the step.

[0015] Preferably, the cooling water channel is arranged in a spiral shape and is arranged around the end and side of the punch.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. The present application provides an open first ring on the punch and the end of the first ring extends beyond the front end of the punch. When the punch is punched, the molten metal enters the opening of the first ring under the pressure of the first ring, and then opens the first ring to ensure the sealing between the punch and the barrel; a mounting hole is provided on the side of the punch and a lubricating spray head is connected through the mounting hole, and oil is supplied through an annular cavity provided in the punch and connected to the lubricating spray head to ensure the lubrication effect; a cooling water channel is provided inside the front end of the punch, so that the side of the punch that contacts the high temperature can be directly cooled, thereby improving the cooling effect and extending the service life of the punch.

[0018] 2. By setting a rounded corner on the front edge of the punch, combined with the annular groove set on the punch and the convex part set on the first ring, the first ring is easily inserted; the middle part of the first ring is disconnected, and when the punch pushes the material, the molten metal can enter the disconnection of the first ring. During die-casting, pressure can be transmitted through the molten metal to expand the first ring from the disconnection, thereby ensuring the sealing effect between the punch and the molten metal.

[0019] 3. By arranging a second ring on the punch and the second ring is an open-loop structure, it is convenient to insert the second ring into the punch, and the second ring can play a centering and positioning effect on the punch to ensure stable pushing; at the same time, an annular portion is arranged between the first ring and the second ring and the lubricating spray head is movably connected to the annular portion, which has a compact structure and is convenient to connect. The sealing ring arranged at the lower part of the lubricating spray head ensures the sealing between the punch and the annular cavity to avoid oil leakage; by arranging a positioning hole on the second ring and arranging a positioning convex portion on the punch, it is convenient to fix the second ring, and at the same time, the open-loop position of the second ring is set downward, and the accumulated excess lubricating oil can be discharged through the open-loop of the second ring, which is convenient for continuous lubrication and ensures the pushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the die-casting machine punch structure in a preferred embodiment of the present application.

[0021] Figure 2 It is an exploded view of the die-casting machine punch structure in a preferred embodiment of the present application.

[0022] Figure 3 It is a structural diagram of the punch in a preferred embodiment of the present application.

[0023] Figure 4 It is an exploded view of the punch in the preferred embodiment of the present application.

[0024] Figure 5 It is a side view of the punch in the preferred embodiment of the present application.

[0025] Figure 6 yes Figure 5 Cross-section of AA.

[0026] Figure 7 It is a cross-sectional view of the punch in the preferred embodiment of the present application.

[0027] Explanation of the accompanying drawings: 1. Barrel; 2. Punch; 201. Annular groove; 202. Mounting hole; 203. Annular cavity; 204. Cooling water channel; 205. Positioning protrusion; 3. First ring; 4. Lubricating spray head; 401. Sealing ring; 5. Second ring; 501. Positioning hole. DETAILED DESCRIPTION

[0028] The present application is further described in detail below with reference to the accompanying drawings.

[0029] The embodiments of the present application disclose a die-casting machine punch structure.

[0030] Reference Figures 1 to 7 , a die-casting machine punch structure, including a barrel 1 and a punch 2 that cooperate with each other, the punch 2 is a hollow sleeve structure and the front end edge of the punch 2 is provided with a rounded corner, the front part of the punch 2 is provided with an annular groove 201 and is connected to a first ring 3 through the annular groove 201, the first ring 3 is an open-loop structure and the outer diameter of the first ring 3 is larger than the inner diameter of the barrel 1, one end of the first ring 3 exceeds the front end of the punch 2, the first ring 3 is annular, and the other end of the first ring 3 is provided with a convex portion corresponding to the annular groove 201 on the inner side, the middle part of the first ring 3 is disconnected and the two sides of the disconnection are staggered with protrusions, and a distance is provided between the protrusion and the other side; a second ring 5 is clamped in the middle of the punch 2, the first ring 3 and the second ring 5 are both made of beryllium copper alloy material, and the second ring 5 is an open-loop structure The second ring 5 is concentrically arranged with the first ring 3 and the length of the second ring 5 is greater than that of the first ring 3. An annular portion is provided between the first ring 3 and the second ring 5. A mounting hole 202 is circumferentially provided on the annular portion. A thread is provided in the mounting hole 202 and is connected to the lubricating spray head 4 through the thread. The lower part of the lubricating spray head 4 is a conical structure and a sealing ring 401 is provided at the lower part of the lubricating spray head 4. A positioning hole 501 is provided on the second ring 5, and a positioning protrusion 205 matching the positioning hole 501 is provided in the middle part of the punch 2. When the positioning hole 501 cooperates with the positioning protrusion 205, the open loop position on the second ring 5 is set downward, and a polygonal clamping protrusion is provided on the outer side of the end of the punch 2, a step is provided on the inner side of the end and a connecting thread is provided on the end of the step.

[0031] Reference Figures 3 to 7A plurality of mounting holes 202 are provided on the side of the punch 2, and a lubricating spray head 4 is movably connected through the mounting holes 202. An annular cavity 203 is provided at the position corresponding to the mounting hole 202 inside the punch 2, and the annular cavity 203 can be connected to the lubricating spray head 4. An oil inlet channel and an oil inlet pipe are connected to the annular cavity 203. A cooling water channel 204 is provided on the inner side of the front end of the punch 2. The cooling water channel 204 is spirally arranged and is wound around the end and side of the punch 2.

[0032] The implementation principle is as follows: the present application provides an open-loop first ring 3 on the punch and the end of the first ring 3 extends beyond the front end of the punch 2. When the punch is punched, the molten metal enters the opening of the first ring 3 under the pressure of the first ring 3, and then opens the first ring 3 to ensure the sealing between the punch 2 and the barrel 1; a mounting hole 202 is provided on the side of the punch 2 and the lubricating spray head 4 is connected through the mounting hole 202, and oil is supplied to the lubricating spray head 4 through the annular cavity 203 provided in the punch 2; a cooling water channel 204 is provided inside the front end of the punch 2, so that the side of the punch 2 that contacts the high temperature can be directly cooled, thereby improving the cooling effect and extending the service life of the punch 2.

[0033] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A die-casting machine punch structure, characterized in that: The invention comprises a barrel (1) and a punch (2) which cooperate with each other, wherein the front of the punch (2) is provided with an annular groove (201) and is connected to a first ring (3) through the annular groove (201), the first ring (3) is an open ring structure and the outer diameter of the first ring (3) is larger than the inner diameter of the barrel (1), one end of the first ring (3) exceeds the front end of the punch (2), a plurality of mounting holes (202) are provided on the side of the punch (2) and a lubricating spray head (4) is movably connected through the mounting holes (202), an annular cavity (203) is provided at a position corresponding to the mounting holes (202) inside the punch (2), and the annular cavity (203) can be connected to the lubricating spray head (4), an oil inlet channel and an oil inlet pipe are connected to the annular cavity (203), and a cooling water channel (204) is provided on the inner side of the front end of the punch (2).

2. A die-casting machine punch structure according to claim 1, characterized in that: The punch (2) is a hollow sleeve structure, the front edge of the punch (2) is provided with a rounded corner, the inner side of the other end of the first collar (3) is provided with a convex portion corresponding to the annular groove (201), the middle of the first collar (3) is disconnected, and protrusions are staggered on both sides of the disconnection, and a distance is provided between the protrusion and the other side.

3. The die-casting machine punch structure according to claim 1, characterized in that: A second ring (5) is clamped in the middle of the punch (2). The second ring (5) is an open ring structure. The second ring (5) is concentrically arranged with the first ring (3) and the length of the second ring (5) is greater than the length of the first ring (3).

4. The die-casting machine punch structure according to claim 3, characterized in that: An annular portion is provided between the first sleeve ring (3) and the second sleeve ring (5), the annular portion being circumferentially provided with the mounting hole (202), a thread being provided in the mounting hole (202) and being connected to the lubricating spray head (4) via the thread, the lower portion of the lubricating spray head (4) being a conical structure and a sealing ring (401) being provided at the lower portion of the lubricating spray head (4).

5. The die-casting machine punch structure according to claim 3, characterized in that: The second collar (5) is provided with a positioning hole (501), and the middle portion of the punch (2) is provided with a positioning protrusion (205) matching the positioning hole (501). When the positioning hole (501) and the positioning protrusion (205) are matched, the open loop position on the second collar (5) is set downward.

6. The die-casting machine punch structure according to claim 3, characterized in that: The first sleeve ring (3) and the second sleeve ring (5) are both made of beryllium copper alloy material.

7. The die-casting machine punch structure according to claim 1, characterized in that: A polygonal clamping protrusion is provided on the outer side of the end of the punch (2), a step is provided on the inner side of the end, and a connecting thread is provided at the end of the step.

8. The die-casting machine punch structure according to claim 1, characterized in that: The cooling water channel (204) is arranged in a spiral shape and is arranged around the end and side of the punch (2).

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