Die casting model core pin cooling device with adaptive cooling channel depth

Abstract

The invention relates to the technical field of die-casting molds, and in particular to a die-casting model core needle cooling device with adaptive cooling channel depth; the device comprises a connector, an outer tube and an inner tube, wherein the outer tube and the inner tube are coaxial and fixedly mounted on the connector, a telescopic tube is arranged inside the inner tube, and the telescopic tube can move axially relative to the inner tube; a water sealing plate is arranged at a water outlet of the telescopic tube, and a plurality of water outlet holes are opened on the water sealing plate; a limiting column is arranged on the water sealing plate; by arranging an axially telescopic telescopic tube in the inner tube, when the invention is applied to a core needle part with cooling channels of different depths, the telescopic tube can extend outward along the axial direction of the inner tube under the action of its own gravity or the pressure of water inlet, so as to adapt to cooling channels of different depths, so that core needles with different cooling channel depths can share the same type of cooling device, thereby reducing the assembly time and maintenance cost of the mold.

Description

Technical Field

[0001] The invention relates to the technical field of die casting moulds, in particular to a die casting model core pin cooling device with adaptive cooling channel depth. Background Art

[0002] Die casting is an advanced and efficient manufacturing technology that is widely used in the automotive, communications, home appliance and other industries.

[0003] The temperature and control technology of the die-casting mold have a great influence on the service life of the die-casting mold, the surface and internal quality of the die-casting parts. To efficiently and economically produce high-quality die-casting parts, mold temperature control is essential.

[0004] With the global development and attention to energy conservation, emission reduction and product lightweighting technologies, the structure of die castings is becoming more and more complex and the size is getting larger. There are more and more places where core pins are set on the die casting mold. For the core pin part of the die casting mold, when the temperature is too low, the core pin is strongly impacted by the liquid metal, and the temperature difference between the inside and outside is large, and the core pin is very likely to deform or even crack and damage. Surrounded by high-temperature molten metal, the temperature rises rapidly. When the temperature at the core pin is too high, the cooling speed of the molten metal at this place is slow, and defects such as shrinkage and shrinkage holes are prone to appear in the casting, which seriously affects the quality of the casting. At the same time, the molten metal is easy to stick to the mold, resulting in difficulty in demolding, pulling the casting, and damaging the core pin.

[0005] Therefore, in order to ensure normal production, the temperature of the mold core pin must be effectively controlled.

[0006] At present, the temperature control of the core needle part generally adopts a water cooling device, through which cooling water is transported to the bottom of the cooling channel inside the core needle, and then the cooled hot water is pumped away at the upper part of the cooling channel, and the cycle is repeated, thereby achieving effective cooling of the core needle part.

[0007] For core pins of different lengths, since the depths of the cooling channels inside them are different, the current practice is to configure different core pins with different cooling devices, which cannot be shared. This leads to a large variety of mold parts, and specific cooling devices must be used during assembly and maintenance, which greatly affects the mold assembly speed and maintenance costs.

[0008] Therefore, it is necessary to design a cooling core needle device so that it can adapt to core needles with different cooling channel depths. Summary of the invention

[0009] In order to solve the problem that core pins with different cooling channel depths in the current die-casting mold need to be provided with different cooling core pin devices, resulting in long mold assembly time and high subsequent maintenance costs, the present invention provides a die-casting model core pin cooling device with adaptive cooling channel depth.

[0010] In order to achieve the above functions, the technical solution provided by the present invention is:

[0011] A die-casting model core pin cooling device with adaptive cooling channel depth, comprising a connector, an outer tube and an inner tube, wherein the outer tube and the inner tube are coaxial and fixedly mounted on the connector, and a telescopic tube is arranged inside the inner tube, and the telescopic tube can move axially relative to the inner tube;

[0012] The water outlet of the telescopic pipe is provided with a water sealing plate, and a plurality of water outlet holes are opened on the water sealing plate;

[0013] The water sealing plate is provided with a limiting column.

[0014] Preferably, a raised shoulder is provided at the rear end of the connector, a water outlet joint and a water inlet joint are rotatably sleeved on the connector in sequence, a nut is provided at the front end of the connector, the water inlet joint is connected to the inner tube, and the water outlet joint is connected to the outer tube;

[0015] The water inlet joint and the water outlet joint are coaxially arranged;

[0016] A first sealing ring, a second sealing ring and a third sealing ring are respectively arranged in sequence between the water outlet joint and the shaft shoulder, between the water outlet joint and the water inlet joint, and between the water inlet joint and the nut.

[0017] Preferably, a plurality of radial water outlet micro-holes are provided on the circumferential tube wall at the end of the telescopic tube.

[0018] Preferably, the length of the limiting column is 5 mm to 15 mm.

[0019] Preferably, the sum of the water outlet areas of the water outlet hole and the radial water outlet micropores is not greater than the cross-sectional area of ​​the telescopic tube.

[0020] The beneficial effects of the present invention are:

[0021] 1. By arranging an axially retractable telescopic tube in the inner tube, when the present invention is applied to core pins with cooling channels of different depths, the telescopic tube can extend outward along the axial direction of the inner tube under the action of its own gravity or the pressure of water inflow, so as to adapt to cooling channels of different depths, so that core pins with different cooling channel depths can share the same cooling device, thereby reducing the assembly time and maintenance cost of the mold;

[0022] 2. The water outlet joint and the water inlet joint can be rotated 360 degrees at will, so that the direction of the water inlet joint and the water outlet joint can be adjusted at will to facilitate connection and facilitate water inflow and outflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a structural schematic diagram of embodiment 1;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of the extension of the middle telescopic tube;

[0025] Figure 3 for Figure 1 Cross-sectional view of . DETAILED DESCRIPTION

[0026] The following is combined with Figure 1 To Attachment Figure 3 The present invention will be further described:

[0027] like Figure 1 and Figure 2 The die casting model core pin cooling device with adaptive cooling channel depth shown in the figure comprises a connector 1, an outer tube 2, an inner tube 3 and a telescopic tube 4. The outer tube 2 and the inner tube 3 are coaxial and fixedly mounted on the connector 1. The end of the outer tube 2 is provided with a thread for connecting with the core pin.

[0028] The inner tube 3 is provided with a telescopic tube 4, that is, the inner tube 3 is sleeved outside the telescopic tube 4. Figure 3 As shown, more than two support rings 31 are arranged inside the inner tube 3 , and the support rings 31 are used to support the telescopic tube 4 and limit the radial movement of the telescopic tube 4 . The telescopic tube 4 can move axially relative to the inner tube 3 .

[0029] The water outlet of the telescopic tube 4 is provided with a water sealing plate 41 , and a plurality of water outlet holes 411 are evenly opened on the water sealing plate 41 .

[0030] In order to achieve a better cooling effect, a plurality of radial water outlet micropores 42 are provided on the circumferential tube wall at the end of the telescopic tube 4. In this embodiment, the sum of the water outlet areas of the water outlet holes 411 and the radial water outlet micropores 42 is not greater than the cross-sectional area of ​​the telescopic tube 4. The cross-sectional area of ​​the telescopic tube 4 refers to the cross-sectional area of ​​the water flow channel inside the telescopic tube 4.

[0031] The water sealing plate 41 is provided with a limit post 43. The purpose of providing the limit post 43 is to prevent the telescopic tube 4 from extending to the bottom of the cooling channel. If the telescopic tube 4 fits the bottom of the cooling channel, it will affect the outflow of cold water in the telescopic tube 4, thereby affecting the cooling effect of the present invention on the core needle.

[0032] In this embodiment, the length of the limiting column 43 is 10 mm, and the length of the limiting column 43 can be selected according to actual needs. Generally, when the length of the limiting column 43 is 5 mm to 15 mm, the cooling effect of the device on the core needle is better.

[0033] A raised shoulder 11 is provided at the rear end of the connector 1, and the water outlet connector 5 and the water inlet connector 6 are rotatably mounted on the connector 1 in sequence, and the water inlet connector 6 and the water outlet connector 5 are coaxially arranged. A nut 7 is provided at the front end of the connector 1, and the water inlet connector 6 is connected to the inner tube 3, and the water outlet connector 5 is connected to the outer tube 2.

[0034] A first sealing ring 8, a second sealing ring 9 and a third sealing ring 10 are respectively arranged between the water outlet joint 5 and the shaft shoulder 11, between the water outlet joint 5 and the water inlet joint 6, and between the water inlet joint 6 and the nut 7. The first sealing ring 8, the second sealing ring 9 and the third sealing ring 10 are all sleeved on the connector 1. By pressing the water inlet joint 6 and the water outlet joint 5 onto the shaft shoulder 11 through the nut 7, the sealing ring can be deformed to achieve the purpose of sealing and preventing water leakage. In this embodiment, the sealing ring is an O-ring.

[0035] When in use, the outer tube 2 of the present invention is connected to the cooling channel of the core needle provided with an internal thread, and the water inlet joint 6 and the water outlet joint 5 are respectively connected to the water inlet and outlet pipes of the external cooling system. In normal die-casting production, due to the continuous heat exchange between the high-temperature aluminum liquid and the mold, the mold temperature will continue to rise, and the temperature of the core needle part on the mold will also gradually rise. At this time, cooling water is introduced into the water inlet pipe, and the cooling water enters the inner tube 3 after passing through the water inlet joint 6. The high-pressure cooling water pushes the telescopic tube 4 to move forward axially until the limit column 43 contacts the bottom of the cooling channel. Cold water is sprayed out from the water outlet hole 411 at the bottom of the telescopic tube 4 and the radial water outlet micropores 42 on the side. When flowing through the cooling channel inside the core needle, it continuously exchanges heat with the core needle, thereby reducing the temperature of the core needle part. The cooling water finally enters the water outlet pipe through the outer tube 2 and the water outlet joint 5.

Claims

1. A die-casting model core pin cooling device with adaptive cooling channel depth, comprising a connector, an outer tube and an inner tube, wherein the outer tube and the inner tube are coaxial and fixedly mounted on the connector, characterized in that: A telescopic tube is arranged inside the inner tube, and the telescopic tube can move axially relative to the inner tube; The water outlet of the telescopic pipe is provided with a water sealing plate, and a plurality of water outlet holes are opened on the water sealing plate; The water sealing plate is provided with a limiting column; The rear end of the connector is provided with a raised shoulder, the water outlet connector and the water inlet connector are rotatably sleeved on the connector in sequence, the front end of the connector is provided with a nut, the water inlet connector is connected to the inner tube, and the water outlet connector is connected to the outer tube; The water inlet joint and the water outlet joint are coaxially arranged; A first sealing ring, a second sealing ring and a third sealing ring are respectively arranged between the water outlet joint and the shaft shoulder, between the water outlet joint and the water inlet joint, and between the water inlet joint and the nut; A plurality of radial water outlet micro-holes are provided on the circumferential tube wall at the end of the telescopic tube; The length of the limiting column is 5mm to 15mm.

2. The die casting mold core pin cooling device with adaptive cooling channel depth according to claim 1, characterized in that: The sum of the water outlet areas of the water outlet hole and the radial water outlet micropores is not greater than the cross-sectional area of ​​the telescopic tube.

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