Quick cooling structure of injection rod of die casting machine

Abstract

This utility model discloses a rapid cooling structure for the injection rod of a die-casting machine, comprising an injection rod, a connector, and a punch connected in sequence, all of which are hollow. A cooling copper tube is arranged inside the injection rod along its axial direction. The outer diameter of the cooling copper tube is smaller than the inner diameter of the injection rod, creating a first return channel between the outer wall of the cooling copper tube and the inner wall of the injection rod. A return cavity for the punch is formed between the inner wall of the punch and the front stud portion of the connector. The connector includes a rear stud portion, a nut portion, a front stud portion, and a flow divider portion; the rear stud portion is screwed to the injection rod, and the front stud portion is screwed to the punch. Several drainage grooves are radially arranged on the front surface of the flow divider portion; the connector has a second return channel connecting to the first return channel. This rapid cooling structure for the injection rod, by radially and evenly arranging drainage grooves on the connector, allows cooling water to uniformly cool the punch, achieving a rapid cooling effect.

Description

Technical Field

[0001] This utility model relates to the field of die casting equipment technology, and in particular to a rapid cooling structure for the injection rod of a die casting machine. Background Technology

[0002] Die casting machines are industrial casting machines that use pressure to inject molten metal into a mold, where it cools and solidifies, resulting in a solid metal casting. One end of the injection rod connects to the injection piston rod of the die casting machine's injection cylinder, while the other end connects to the punch via a connector. The punch is in direct contact with the high-temperature molten aluminum and remains in contact with the high-temperature material throughout the injection and cooling process, resulting in extremely high punch temperatures. Therefore, it is necessary to cool the punch.

[0003] In existing technologies, the cooling method for die-casting injection rods involves cooling water entering the punch after passing through a cooling copper pipe and connector. The cooling water performs heat exchange cooling on the punch, and the return water flows directly back out through the gap between the outer wall of the cooling copper pipe and the inside of the connector. This cooling method has the following drawbacks: 1) Because the flow pattern of the return water cannot be controlled, the cooling speed of the punch is slow and the cooling effect is poor; 2) Uneven contact between the cooling water and the punch further slows down the cooling speed of the punch; 3) The return water is not diverted and the return water flow rate is slow, making it impossible to quickly exchange heat. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a rapid cooling structure for the injection rod of a die-casting machine, thereby overcoming the deficiencies in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A rapid cooling structure for the injection rod of a die-casting machine includes an injection rod, a connector, and a punch; The injection rod is screwed to the rear stud of the connector, and the punch is screwed to the front stud of the connector. The injection rod, the connector, and the punch are all hollow. The injection rod has a cooling copper tube arranged inside along its axial direction. The outer diameter of the cooling copper tube is smaller than the inner diameter of the injection rod, so that the gap between the outer wall of the cooling copper tube and the inner wall of the injection rod forms a first return channel. The front end of the cooling copper tube passes through the injection rod and is inserted into the inner cavity of the connector. The rear end of the cooling copper tube is connected to an external cooling device through a water inlet connector. The first return channel discharges the heat-exchanged return water in the first return channel through a water outlet connector.

[0006] Furthermore, the inner diameter of the punch's inner cavity is larger than the outer diameter of the front stud portion of the connector, so that the gap between the inner wall of the punch and the outer wall of the front stud portion of the connector forms a punch return cavity.

[0007] Furthermore, the connector includes a rear stud portion, a nut portion, a front stud portion, and a diverter portion integrally arranged in sequence; the rear stud portion is screwed to the injection rod, the nut portion is used to connect external driving tools such as wrenches, the front stud portion is screwed to the punch, and the diverter portion is used to divert the coolant entering from the cooling copper pipe.

[0008] Furthermore, a plurality of drainage grooves are radially provided on the front end face of the diversion section; a plurality of first return water holes are uniformly provided on the circumferential wall of the diversion section.

[0009] Furthermore, the end face of the rear stud portion is provided with a plurality of second return water holes evenly arranged in the circumferential direction. The second return water holes correspond to and are connected with the first return water holes respectively, so that the connector has a plurality of second return channels circumferentially distributed around the central shaft.

[0010] Preferably, a first sealing ring is provided at the insertion point between the cooling copper pipe and the connector.

[0011] Preferably, a second sealing ring is provided at the screw connection between the rear stud portion of the connector and the injection rod.

[0012] Preferably, a third sealing ring is provided at the threaded connection between the front stud portion of the connector and the punch.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1) The cooling structure of the injection rod of the die-casting machine in this case is improved by the connection head. The flow-guiding grooves are radially and evenly arranged on the flow-dividing part of the connection head, and several second return water channels are set inside the connection head. This makes the cooling water form a single-stream inlet and multiple-stream return water flow in the injection rod, which accelerates the flow rate of inlet and return water. Moreover, the cooling water can uniformly cool the punch through the flow-guiding grooves to achieve the effect of rapid cooling.

[0014] 2) The injection rod cooling structure of the die-casting machine in this case has a first sealing ring at the connection between the cooling copper pipe and the connector, a second sealing ring at the screw connection between the injection rod and the connector, and a third sealing ring at the screw connection between the connector and the punch, to ensure that the cooling water inlet and outlet do not mix, and further ensure the rapid cooling effect of the punch.

[0015] 3) The second return water channel of the cooling structure of the injection rod of the die-casting machine in this case has been beveled to ensure more stable and faster return water.

[0016] To provide a clearer understanding of this invention, the preferred embodiments of this invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a three-dimensional rendering of the present invention; Figure 2 This is a perspective view of the present invention; Figure 3 This is a perspective assembly drawing of the punch and connector in this utility model; Figure 4 , Figure 5 This is a three-dimensional rendering of the connector of this utility model; Figure 6 , Figure 7 This is a cross-sectional view of the connector of this utility model.

[0018] Attached image labels: 1-Injection rod, 2-Connector, 3-Punch, 4-Cooling copper pipe, 5-First sealing ring, 6-Water inlet connector, 7-Water outlet connector, 8-Second sealing ring, 9-Third sealing ring; 11-First return channel; 21-Rear end stud, 22-Nut, 23-Front end stud, 24-Diverter; 241-Drainage groove, 242-First return hole, 243-Second return hole, 244-Second return channel, 31-Punch return cavity. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] Furthermore, if terms such as "first" or "second" are used for descriptive purposes only, they are mainly used to distinguish different devices, components or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, components or parts, and should not be construed as indicating or implying relative importance.

[0021] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0022] Please also refer to Figures 1-7 This utility model provides a rapid cooling structure for the injection rod of a die casting machine, including an injection rod 1, a connector 2, and a punch 3. The injection rod 1 is screwed to the rear stud portion 21 of the connector 2, and the punch 3 is screwed to the front stud portion 23 of the connector 2. The injection rod 1, the connector 2, and the punch 3 are all hollow.

[0023] The injection rod 1 has a cooling copper tube 4 arranged inside along the axial direction. The outer diameter of the cooling copper tube 4 is smaller than the inner diameter of the injection rod 1, so that the gap between the outer wall of the cooling copper tube 4 and the inner wall of the injection rod 1 forms a first return channel 11. The front end of the cooling copper tube 4 passes through the injection rod 1 and is inserted into the inner cavity of the connector 2. A first sealing ring 5 is provided at the insertion point of the cooling copper tube 4 and the connector 2 to ensure that the return water after heat exchange does not mix into the cooling copper tube 4. The rear end of the cooling copper tube 4 is connected to an external cooling device through a water inlet connector 6. The return water after heat exchange in the first return channel 11 is discharged through a water outlet connector 7, so that the punch 3 continues to cool down.

[0024] The inner diameter of the punch 3 is larger than the outer diameter of the front stud portion 23 of the connector 2, so that the gap between the inner wall of the punch 3 and the outer wall of the front stud portion 23 of the connector 2 forms a punch return cavity 31.

[0025] The connector 2 includes a rear stud portion 21, a nut portion 22, a front stud portion 23, and a diverter portion 24, which are integrally arranged in sequence. The rear stud portion 21 is screwed to the injection rod 1 and a second sealing ring 8 is provided at the screw connection. The nut portion 22 is used to connect external driving tools such as wrenches. The front stud portion 23 is screwed to the punch 3 and a third sealing ring 9 is provided at the screw connection. The diverter portion 24 is used to divert the coolant entering from the cooling copper pipe 4. The diversion section 24 has a plurality of drainage grooves 241 radially arranged on its front end face; a plurality of first return water holes 242 are evenly arranged on the circumferential wall of the diversion section 24. The rear stud portion 21 has several second return water holes 243 evenly arranged circumferentially on its end face. The second return water holes 243 correspond to and are connected with the first return water holes 242 respectively, so that the connector 2 has several second return channels 244 circumferentially distributed around the central shaft.

[0026] The working principle of connector 2 is as follows: Cooling water introduced under high pressure from the cooling copper pipe 4 enters the return chamber 31 of the punch after passing through the drainage groove 241 of the connector 2. Since the drainage groove 241 is radially uniformly arranged, the cooling water can uniformly cool the punch 3, achieving a rapid cooling effect. Then, the return water after heat exchange is uniformly guided into the first return water hole 242, and then through the second return channel 244 in the connector 2, and then through the second return water hole 243 into the first return channel 11 in the injection rod 1, and finally discharged from the outlet connector 7. Throughout the process, the cooling water introduced from the cooling copper pipe 4 rapidly cools the punch 3, and the return water after heat exchange is discharged from the first return channel 11 in the injection rod 1, forming a continuous cooling cycle for the punch 3, ensuring that the punch 3 is maintained in a safe low-temperature working state.

[0027] Compared to existing technologies, the rapid cooling structure for the injection rod of a die-casting machine in this case improves the connector by radially and evenly setting drainage grooves on the flow distribution part of the connector and setting several second return water channels inside the connector. This allows the cooling water to form a single-stream inlet and multiple-stream return flow in the injection rod, accelerating the flow rate of inlet and return water, and enabling the cooling water to uniformly cool the punch, achieving a rapid cooling effect.

[0028] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A rapid cooling structure for the injection rod of a die-casting machine, comprising an injection rod (1), a connector (2), and a punch (3), characterized in that: The injection rod (1) is screwed to the rear stud portion (21) of the connector (2), and the punch (3) is screwed to the front stud portion (23) of the connector (2). The injection rod (1), the connector (2) and the punch (3) are all hollow. The injection rod (1) has a cooling copper tube (4) arranged inside along the axial direction. The outer diameter of the cooling copper tube (4) is smaller than the inner diameter of the injection rod (1), so that the gap between the outer wall of the cooling copper tube (4) and the inner wall of the injection rod (1) forms a first return channel (11). The front end of the cooling copper tube (4) passes through the injection rod (1) and is inserted into the inner cavity of the connector (2). The rear end of the cooling copper tube (4) is connected to an external cooling device through a water inlet connector (6). The first return channel (11) discharges the heat-exchanged return water in the first return channel (11) through a water outlet connector (7). The connector (2) includes a rear stud portion (21), a nut portion (22), a front stud portion (23), and a diverter portion (24) integrally arranged in sequence. The rear stud portion (21) is screwed to the injection rod (1), the nut portion (22) is used to connect an external driving tool, the front stud portion (23) is screwed to the punch (3), and the diverter portion (24) is used to divert the coolant entering from the cooling copper pipe (4). The front end face of the diverter portion (24) is radially provided with several drainage grooves (241). Several first return water holes (242) are uniformly provided on the circumferential wall of the diverter portion (24). Several second return water holes (243) are uniformly provided on the end face of the rear stud portion (21) in the circumferential direction. The second return water holes (243) correspond to and communicate with the first return water holes (242) respectively, so that the connector (2) has several second return channels (244) circumferentially distributed around the central axis.

2. The quick cooling structure of the injection rod of the die casting machine according to claim 1, characterized in that: The inner diameter of the inner cavity of the punch (3) is larger than the outer diameter of the front stud portion (23) of the connector (2), so that the gap between the inner wall of the punch (3) and the outer wall of the front stud portion (23) of the connector (2) forms a punch return cavity (31).

3. The quick cooling structure of the injection rod of the die casting machine according to claim 2, characterized in that: A first sealing ring (5) is provided at the insertion point of the cooling copper pipe (4) and the connector (2).

4. The rapid cooling structure of the injection rod of the die casting machine according to claim 2, characterized in that: A second sealing ring (8) is provided at the screw connection between the rear stud portion (21) of the connector (2) and the injection rod (1).

5. The quick cooling structure of the injection rod of the die casting machine according to claim 2, characterized in that: A third sealing ring (9) is provided at the screw connection between the front stud portion (23) of the connector (2) and the punch (3).

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