Die casting apparatus

Abstract

This utility model discloses a die-casting device, comprising: a material cylinder having a pressure chamber; a material cake having a material cake end face, at least a portion of the material cake being disposed in the pressure chamber with the material cake end face positioned within the pressure chamber; and a hammer assembly slidably disposed in the pressure chamber, the hammer assembly including a hammer and a connecting rod, the hammer being slidably disposed in the pressure chamber, the hammer having an extrusion section disposed opposite to the material cake end face, and a cooling chamber formed on the side of the extrusion section away from the material cake end face, the hammer being operably close to or away from the material cake end face, the connecting rod having a first end and a second end opposite to each other, the first end passing through the cooling chamber and forming a gap with the extrusion section, wherein the outer wall of the first end is provided with a spiral flow channel, the connecting rod also having an inlet flow channel and an outlet flow channel, the inlet of the inlet flow channel being exposed in the cooling chamber, the outlet of the inlet flow channel passing through the end face of the first end, and the inlet of the outlet flow channel being formed on the outer wall of the first end and communicating with the outlet of the spiral flow channel.

Description

Technical Field

[0001] This utility model relates to the field of die casting technology, and in particular to a die casting device. Background Technology

[0002] In the field of die casting technology, die casting equipment is used to inject high-temperature molten metal (such as aluminum or magnesium alloys) into a mold cavity to form precision parts. The hammer assembly is a key component, responsible for propelling the molten metal within the pressure chamber. However, existing cooling systems have significant drawbacks, leading to low production efficiency and increased costs.

[0003] The working principle of a die-casting device includes: high-temperature molten metal (approximately 700℃) enters the pressure chamber through the inlet; the hammer pushes the molten metal, which then flows through the cake-flow channel into the mold cavity; after the cavity is filled, the hammer remains at the termination position for a period of time to cool the cake; subsequently, the hammer returns to the starting position, entering the next injection cycle. Throughout the cycle, cooling water flows inside the hammer to cool it. However, after entering the hammer, the cooling water cannot flow evenly within it, resulting in several "blind spots" where the cooling water cannot fill. This leads to uneven cooling of the hammer and affects the cooling effect of the hammer on the cake. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a die-casting device that can improve the cooling effect on the hammer and / or the die.

[0005] A die-casting apparatus according to some embodiments of the present invention includes: a barrel having a pressure chamber; a die having a die end face, at least a portion of the die being disposed in the pressure chamber and the die end face being placed within the pressure chamber; and a hammer assembly slidably disposed in the pressure chamber, the hammer assembly including a hammer and a connecting rod, the hammer being slidably disposed in the pressure chamber, the hammer having an extrusion portion disposed opposite to the die end face, and a cooling cavity formed on the side of the extrusion portion away from the die end face, the hammer being operably close to or away from the die end face. The connecting rod has a first end and a second end. The first end passes through the cooling cavity and forms a gap with the extrusion part. The second end is located outside the cooling cavity. The outer wall of the first end is provided with a spiral flow channel. The connecting rod is also provided with an inlet flow channel and an outlet flow channel. The inlet of the inlet flow channel is exposed in the cooling cavity. The outlet of the inlet flow channel passes through the end face of the first end. The inlet of the outlet flow channel is formed on the outer wall of the first end and communicates with the outlet of the spiral flow channel. The outlet of the outlet flow channel is exposed in the cooling cavity.

[0006] The die-casting apparatus according to the embodiments of the present invention has at least the following beneficial effects: In the die-casting device of this invention, coolant, such as water or other coolant, enters the inlet channel through the inlet of the inlet channel, then enters the gap through the outlet of the inlet channel, then enters the spiral channel, then enters the outlet channel through the outlet of the spiral channel, and finally flows out through the outlet of the outlet channel. During this process, the hammer head is cooled. When the extrusion section abuts against the end face of the cake, the cooling effect of the coolant on the extrusion section also transfers the cooling energy to the cake, thereby lowering its temperature. It should be noted that by providing a spiral channel on the outer wall of the first end of the connecting rod, the spiral channel slows down the flow rate of the coolant, allowing the coolant to fill the gap, thus providing more uniform cooling to all parts of the extrusion section, resulting in more even cooling of the cake and improving the cooling effect.

[0007] According to some embodiments of the present invention, the outer side wall of the first end is provided with helical blades, and the helical blades define the helical flow channel.

[0008] According to some embodiments of the present invention, the liquid inlet channel extends from the end face of the second end toward the end face of the first end.

[0009] According to some embodiments of the present invention, the outlet of the liquid outlet channel is located on the end face of the second end.

[0010] According to some embodiments of the present utility model, the connecting rod includes a rod body and a tube. The rod body is provided with a through hole. The through hole extends along the axial direction of the rod body and penetrates the end face of the first end and the end face of the second end. The through hole includes a first hole segment disposed near the end face of the first end and a second hole segment communicating with the first hole segment and located on the side of the end face of the first hole segment away from the first end. The first hole segment and the second hole segment are coaxially disposed, and the diameter of the first hole segment is smaller than the diameter of the second hole segment. The pipe is inserted through the first hole section and the second hole section. The pipe is sealed to the hole wall of the first hole section. The internal flow channel of the pipe constitutes the liquid inlet flow channel. The liquid outlet flow channel includes a first flow channel formed between the outer wall of the pipe and the hole wall of the second hole section, and a second flow channel that communicates with the first flow channel and penetrates the outer wall of the first end.

[0011] According to some embodiments of the present invention, the hammerhead further has a side portion connected to the extrusion section, the side portion being connected to the side of the extrusion section away from the end face of the cake, and the extrusion section and the side portion together form the cooling cavity.

[0012] According to some embodiments of the present invention, a sealing ring is provided between the outer wall of the connecting rod and the inner wall of the side portion, and the sealing ring is located on the side of the inlet of the liquid outlet channel near the second end.

[0013] According to some embodiments of the present invention, the outer side wall of the connecting rod is provided with a mounting groove, and the sealing ring is disposed in the mounting groove.

[0014] According to some embodiments of the present invention, the outer side wall of the first end is provided with a spiral blade, the spiral blade defines the spiral flow channel, and the spiral blade abuts against or is spaced 0.1mm-0.5mm from the inner wall of the side.

[0015] According to some embodiments of the present invention, the distance between the end face of the first end and the inner wall of the extrusion part is between 1mm and 3mm.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of a die-casting device according to an embodiment of the present invention; Figure 2 This is another structural schematic diagram of a die-casting device according to an embodiment of the present invention.

[0018] Icon labels: 100. Material cylinder; 101. Pressure chamber; 102. Inlet; 200. Hammer head assembly; 201. First end; 202. Second end; 203. Liquid inlet channel; 204. Liquid outlet channel; 2041. First channel; 2042. Second channel; 210. Hammer head; 211. Extrusion section; 212. Side section; 213. Cooling chamber; 220. Connecting rod; 221. Rod body; 2211. Spiral blade; 2212. Spiral channel; 2213. Through hole; 22131. First hole section; 22132. Second hole section; 222. Pipe fitting; 230. Gap; 300. Material cake; 310. End face of material cake; 400. Injection runner; 500, cavity. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1 As shown, a die-casting apparatus provided in one embodiment of the present invention includes a material cylinder 100, a hammer assembly 200, and a material cake 300.

[0023] The material cylinder 100 is equipped with a pressure chamber 101.

[0024] Specifically, the barrel 100 is a hollow structure with openings at both ends and a pressure chamber 101 inside. Furthermore, the outer wall of the barrel 100 is provided with an inlet 102, through which liquid metal can enter the interior of the pressure chamber 101. The temperature of the liquid metal can reach above 600°C.

[0025] The material cake 300 has a material cake end face 310, and at least a portion of the material cake 300 is disposed in the pressure chamber 101 with the material cake end face 310 placed inside the pressure chamber 101.

[0026] Specifically, the material cake 300 is disposed at one end of the material cylinder 100, and at least a portion of the structure of the material cake 300 is disposed inside one end of the pressure chamber 101, with the material cake end face 310 of the material cake 300 facing the other end of the pressure chamber 101.

[0027] The hammer assembly 200 is slidably disposed within the pressure chamber 101, and the hammer assembly 200 can be operated to approach or move away from the end face 310 of the material cake 300. It should be noted that the hammer assembly 200 includes a starting position (…). Figure 1 The position of the hammerhead assembly 200 and the termination position ( Figure 2 (Position of hammer assembly 200); When hammer assembly 200 is in the starting position, hammer assembly 200 is located on the side of feed inlet 102 away from cake 300. At this time, cake 300 and hammer assembly 200 respectively seal both ends of pressure chamber 101. Liquid metal entering pressure chamber 101 through feed inlet 102 can accumulate between cake 300 and hammer assembly 200. When hammer assembly 200 is in the ending position, hammer assembly 200 abuts against cake end face 310 of cake 300. Hammer assembly 200 can move within pressure chamber 101 to move back and forth between the starting position and the ending position.

[0028] Understandably, when the hammer assembly 200 is in the initial position, liquid metal enters the pressure chamber 101 through the inlet 102. Then, the hammer assembly 200 is operated to move towards the sprue 300 until it reaches the termination position. During this process, the liquid metal in the pressure chamber 101 enters the mold cavity 500 through the sprue 300 and the injection channel 400. It should be noted that due to the high temperature of the liquid metal, the temperatures of both the sprue 300 and the hammer assembly 200 will rise during this process. Therefore, cooling treatment of the sprue 300 and the hammer assembly 200 is necessary.

[0029] The hammer assembly 200 includes a hammer 210 and a connecting rod 220. The hammer 210 is slidably disposed in the pressure chamber 101 and is disposed opposite to the end face 310 of the cake. The hammer 210 has a pressing part 211 disposed opposite to the end face 310 of the cake and a cooling chamber 213 formed on the side of the pressing part 211 away from the end face 310 of the cake. The hammer 210 can be operably moved closer to or away from the end face 310 of the cake.

[0030] Specifically, the hammerhead 210 also has a side portion 212 connected to the extrusion section 211. The side portion 212 is connected to the side of the extrusion section 211 away from the end face 310 of the cake. The extrusion section 211 and the side portion 212 together form a cooling chamber 213. When the hammerhead 210 moves toward the end face 310 of the cake, the extrusion section 211 extrudes the liquid metal until it abuts against the end face 310 of the cake. When the extrusion section 211 abuts against the end face 310 of the cake, the hammerhead assembly 200 is in the terminated position.

[0031] The connecting rod 220 has a first end 201 and a second end 202. The first end 201 of the connecting rod 220 passes through the cooling chamber 213. The connecting rod 220 can move together with the hammer head 210. In other words, the relative position of the connecting rod 220 and the hammer head 210 is fixed.

[0032] Furthermore, the first end 201 of the connecting rod 220 passes through the cooling cavity 213 and forms a gap 230 between it and the extrusion part 211, while the second end 202 of the connecting rod 220 is located outside the cooling cavity 213.

[0033] Furthermore, the outer wall of the first end 201 of the connecting rod 220 is provided with a spiral flow channel 2212. Specifically, the outer wall of the first end 201 of the connecting rod 220 is provided with a spiral blade 2211, which defines the spiral flow channel 2212. More specifically, the spiral blade 2211 extends spirally from the end face of the first end 201 of the connecting rod 220 toward the end face of the second end 202 of the connecting rod 220 to form the spiral flow channel 2212. The connecting rod 220 is also provided with an inlet flow channel 203 and an outlet flow channel 204, with the inlet of the inlet flow channel 203 exposed. Regarding the cooling chamber 213, in other words, the inlet of the liquid inlet channel 203 is not inside the cooling chamber 213, and the outlet of the liquid inlet channel 203 passes through the end face of the first end 201 of the connecting rod 220 and communicates with the gap 230, while the gap 230 communicates with the inlet of the spiral channel 2212; the inlet of the liquid outlet channel 204 is formed on the outer side wall of the first end 201 of the connecting rod 220 and communicates with the outlet of the spiral channel 2212, and the outlet of the liquid outlet channel 204 is exposed in the cooling chamber 213, in other words, the outlet of the liquid outlet channel 204 is not inside the cooling chamber 213.

[0034] Understandably, coolant, such as water or other coolant, enters the inlet channel 203 through the inlet, then enters the gap 230 through the outlet, then enters the spiral channel 2212, then enters the outlet channel 204 through the outlet of the spiral channel 2212, and finally flows out through the outlet of the outlet channel 204. This process cools the hammerhead 210. When the extrusion section 211 abuts against the end face 310 of the cake, the cooling effect of the coolant on the extrusion section 211 also transfers the cooling energy to the cake 300, thereby lowering the temperature of the cake 300. It should be noted that by providing a spiral flow channel 2212 on the outer wall of the first end 201 of the connecting rod 220, the spiral flow channel 2212 can slow down the flow rate of the coolant, thereby allowing the coolant to fill the gap 230, thus providing more uniform cooling to all parts of the extrusion section 211, resulting in more uniform cooling of the material cake 300 and improving the cooling effect. This also reduces the expansion size of the extrusion section 211, lowering the risk of the hammer head 210 getting stuck during sliding.

[0035] Furthermore, the distance between the end face of the first end 201 of the connecting rod 220 and the inner wall of the extrusion part 211 is between 1mm and 3mm. In other words, the width of the gap 230 is between 1mm and 3mm. Thus, the distance between the end face of the first end 201 of the connecting rod 220 and the inner wall of the extrusion part 211 is relatively short, and the space of the gap 230 is relatively small, which is conducive to the coolant filling the gap 230 and uniformly cooling all parts of the inner wall of the extrusion part 211.

[0036] Furthermore, the spiral blade 2211 abuts against or is spaced 0.1mm-0.5mm from the inner wall of the side portion 212. In this way, the spiral flow channel 2212 formed is very close to the inner wall of the side portion 212. Thus, when the coolant flows in the spiral flow channel 2212, it can also uniformly cool the side portion 212.

[0037] In some embodiments, the inlet channel 203 extends from the end face of the second end 202 of the connecting rod 220 toward the end face of the first end 201. Specifically, the inlet of the inlet channel 203 is formed on the end face of the second end 202 of the connecting rod 220, and the outlet of the inlet channel 203 is formed on the end face of the first end 201 of the connecting rod 220.

[0038] In some embodiments, the outlet of the liquid outlet channel 204 is located at the end face of the second end 202 of the connecting rod 220.

[0039] In some embodiments, the connecting rod 220 includes a rod body 221 and a tube 222. The rod body 221 is provided with a through hole 2213, which extends along the axial direction of the rod body 221 and passes through the end face of the first end 201 and the end face of the second end 202 of the connecting rod 220. It should be noted that the first end 201 of the connecting rod 220 is the first end of the rod body 221, and the end face of the first end 201 of the connecting rod 220 is the end face of the first end of the rod body 221. The second end 202 of the connecting rod 220 is the second end of the rod body 221, and the end face of the second end 202 of the connecting rod 220 is the end face of the second end of the rod body 221.

[0040] The through hole 2213 includes a first hole segment 22131 disposed near the end face of the first end 201 of the connecting rod 220, and a second hole segment 22132 communicating with the first hole segment 22131 and located on the side of the first hole segment 22131 away from the end face of the first end 201 of the connecting rod 220. The first hole segment 22131 and the second hole segment 22132 are coaxially disposed, and the diameter of the first hole segment 22131 is smaller than the diameter of the second hole segment 22132. The fitting 222 passes through the first hole section 22131 and the second hole section 22132. The fitting 222 is sealed to the hole wall of the first hole section 22131. The internal flow channel of the fitting 222 forms the liquid inlet flow channel 203. The liquid outlet flow channel 204 includes a first flow channel 2041 formed between the outer wall of the fitting 222 and the hole wall of the second hole section 22132, and a second flow channel 2042 that communicates with the first flow channel 2041 and passes through the outer wall of the first end 201 of the rod body 221.

[0041] In some embodiments, a sealing ring is provided between the outer wall of the connecting rod 220 and the inner wall of the side portion 212. The sealing ring is located on the side of the inlet of the liquid outlet channel 204 near the second end 202 of the connecting rod 220. The sealing ring is used to improve the sealing effect between the outer wall of the connecting rod 220 and the inner wall of the side portion 212, and reduce the risk of coolant leakage in the cooling chamber 213.

[0042] Furthermore, the outer wall of the connecting rod 220 is provided with a mounting groove, and the sealing ring is disposed in the mounting groove, which is used to position the sealing ring.

[0043] In the die-casting apparatus of this invention, when the hammer assembly 200 is in the initial position, liquid metal enters the interior of the pressure chamber 101 through the feed port 102. Then, the hammer assembly 200 is operated to move towards the sprue 300 until it reaches the termination position. During this process, the liquid metal in the pressure chamber 101 enters the mold cavity 500 through the sprue 300 and the injection channel 400. It should be noted that due to the high temperature of the liquid metal, the temperatures of both the sprue 300 and the hammer assembly 200 will rise during this process. Therefore, it is necessary to cool down the sprue 300 and the hammer assembly 200. Coolant, such as water or other coolant, enters the inlet channel 203 through the inlet, then enters the gap 230 through the outlet, then enters the spiral channel 2212, and finally enters the outlet channel 204 through the outlet of the spiral channel 2212, thus cooling the hammerhead 210. When the extrusion section 211 abuts against the end face 310 of the cake, the cooling effect of the coolant on the extrusion section 211 also transfers the cooling energy to the cake 300, thereby cooling the cake 300. It should be noted that by providing the spiral channel 2212 on the outer wall of the first end 201 of the connecting rod 220, the spiral channel 2212 can slow down the flow rate of the coolant, allowing the coolant to fill the gap 230, thereby providing more uniform cooling to all parts of the extrusion section 211, and thus making the cake 300 more uniformly cooled, improving the cooling effect.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A die-casting apparatus, characterized in that, include: The material cylinder is equipped with a pressure chamber; A cake, having a cake end face, wherein at least a portion of the cake is disposed in the pressure chamber and the cake end face is placed within the pressure chamber; A hammer assembly is slidably disposed in the pressure chamber. The hammer assembly includes a hammer and a connecting rod. The hammer is slidably disposed in the pressure chamber. The hammer has an extrusion section disposed opposite to the end face of the cake and a cooling cavity formed on the side of the extrusion section away from the end face of the cake. The hammer is operably close to or away from the end face of the cake. The connecting rod has a first end and a second end opposite to each other. The first end passes through the cooling cavity and forms a gap with the extrusion section. The second end is located outside the cooling cavity. The outer wall of the first end is provided with a spiral flow channel. The connecting rod is also provided with an inlet flow channel and an outlet flow channel. The inlet of the inlet flow channel is exposed in the cooling cavity. The outlet of the inlet flow channel passes through the end face of the first end. The inlet of the outlet flow channel is formed on the outer wall of the first end and communicates with the outlet of the spiral flow channel. The outlet of the outlet flow channel is exposed in the cooling cavity.

2. The die-casting apparatus according to claim 1, characterized in that, The outer wall of the first end is provided with helical blades, which define the helical flow channel.

3. The die-casting apparatus according to claim 1, characterized in that, The liquid inlet channel extends from the end face of the second end toward the end face of the first end.

4. The die-casting apparatus according to claim 1, characterized in that, The outlet of the liquid outlet channel is located on the end face of the second end.

5. The die-casting apparatus according to claim 1, characterized in that, The connecting rod includes a rod body and a tube. The rod body has a through hole. The through hole extends along the axial direction of the rod body and passes through the end face of the first end and the end face of the second end. The through hole includes a first hole segment disposed near the end face of the first end and a second hole segment communicating with the first hole segment and located on the side of the end face of the first hole segment away from the first end. The first hole segment and the second hole segment are coaxially disposed, and the diameter of the first hole segment is smaller than the diameter of the second hole segment. The pipe is inserted through the first hole section and the second hole section. The pipe is sealed to the hole wall of the first hole section. The internal flow channel of the pipe constitutes the liquid inlet flow channel. The liquid outlet flow channel includes a first flow channel formed between the outer wall of the pipe and the hole wall of the second hole section, and a second flow channel that communicates with the first flow channel and penetrates the outer wall of the first end.

6. The die-casting apparatus according to claim 1, characterized in that, The hammerhead also has a side portion connected to the extrusion section. The side portion is connected to the side of the extrusion section away from the end face of the cake. The extrusion section and the side portion together form the cooling chamber.

7. The die-casting apparatus according to claim 6, characterized in that, A sealing ring is provided between the outer wall of the connecting rod and the inner wall of the side portion, and the sealing ring is located on the side of the inlet of the liquid outlet channel near the second end.

8. The die-casting apparatus according to claim 7, characterized in that, The outer wall of the connecting rod is provided with a mounting groove, and the sealing ring is disposed in the mounting groove.

9. The die-casting apparatus according to claim 6, characterized in that, The outer wall of the first end is provided with a helical blade, which defines the helical flow channel. The helical blade abuts against or is spaced 0.1mm-0.5mm from the inner wall of the side.

10. The die-casting apparatus according to claim 1, characterized in that, The distance between the end face of the first end and the inner wall of the extrusion part is between 1mm and 3mm.

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