Charging barrel of die-casting machine
By designing a spiral heat conduction channel in the die-casting machine barrel to heat the inner cylinder and exhaust air, the deformation and defect problems caused by the alternation of hot and cold of the barrel in the prior art are solved, the quality of the die-casting parts is improved and raw material waste is reduced.
Patent Information
- Application Number
- CN202421731691.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-19
AI Technical Summary
The existing die-casting machine barrels are not preheated and discharged from internal air before use, resulting in the sudden transportation of high-temperature metal liquid to the cold and cold barrel, causing alternation of cold and heat, sudden temperature changes, resulting in deformation or cracking of the barrel, and resulting pores and hollow defects.
A die-casting machine barrel including an inner cylinder, an outer cylinder, a circulation joint and a temperature sensor is designed. The inner cylinder is heated through a spiral heat conduction channel, and the air in the injection channel is discharged through the first exhaust passage and the second exhaust passage to ensure that the barrel is preheated and air-free before the metal liquid is transported.
It effectively avoids deformation and cracking caused by the alternation of cold and heat of the barrel, reduces pores and hollow defects, improves the production quality of die castings, and reduces waste of raw materials by refluxing the metal liquid.
Smart Images
Figure CN222919613U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of die-casting, in particular to a die-casting machine barrel. Background Art
[0002] The die-casting machine barrel is a key component in a die-casting machine for carrying and conveying molten metal, and its design, material and manufacturing process directly affect the quality and production efficiency of die-castings.
[0003] However, the die-casting machine barrel in the prior art is not preheated and the air inside it is not discharged before use. When high-temperature molten metal is suddenly conveyed into the cold die-casting machine barrel, the die-casting machine barrel undergoes alternating hot and cold and sudden temperature changes, resulting in large deformations or even direct cracking and damage in the injection channel inside the die-casting machine barrel. Moreover, due to the air in the injection channel not being discharged, defects such as pores and cavities will appear in the die-castings. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a die-casting machine barrel, which solves the problems that the die-casting machine barrel in the prior art is not preheated and the air inside it is not discharged before use. When high-temperature molten metal is suddenly conveyed into the cold die-casting machine barrel, the die-casting machine barrel undergoes alternating hot and cold and sudden temperature changes, resulting in large deformations or even direct cracking and damage in the injection channel inside the die-casting machine barrel. Moreover, due to the air in the injection channel not being discharged, defects such as pores and cavities will appear in the die-castings.
[0005] To achieve this purpose, the utility model adopts the following technical solutions:
[0006] A die-casting machine barrel includes an inner cylinder, an outer cylinder, a circulation joint and a temperature sensor;
[0007] The inner cylinder is installed inside the outer cylinder. The inner cylinder is provided with an injection channel, a liquid inlet and a first exhaust channel. The first exhaust channel communicates with the front end of the injection channel and is used to discharge the air in the injection channel. The liquid inlet communicates with the rear end of the injection channel;
[0008] The outer cylinder is provided with a transfer interface, a second exhaust channel, an oil inlet channel and an oil discharge channel. A spiral heat conduction channel is provided between the inner wall of the outer cylinder and the outer wall of the inner cylinder. One end of the spiral heat conduction channel communicates with the oil inlet channel, and the other end of the spiral heat conduction channel communicates with the oil discharge channel;
[0009] One end of the adapter is connected to the liquid inlet, and the other end of the adapter is used to install the adapter of the molten metal supply pipe. One end of the second exhaust passage is connected to the first exhaust passage, and the other end of the second exhaust passage is connected to the circulation joint. The circulation joint is installed on the outer cylinder, and the circulation joint is used to discharge the air in the injection passage and return the discharged molten metal to the molten metal supply place. The temperature sensor is installed on the outer cylinder, and the temperature sensor is used to detect the temperature of the inner cylinder.
[0010] Further, the pitch of the spiral heat conduction passage gradually decreases along the liquid injection direction of the injection passage.
[0011] Specifically, a diversion groove is provided inside the inner cylinder.
[0012] Preferably, the circulation joint is provided with an exhaust pipe and a return pipe. The exhaust pipe is arranged vertically, and the return pipe is arranged horizontally.
[0013] In some embodiments, the outer cylinder is provided with a vertical through groove and an installation cavity. The installation cavity is communicated with the vertical through groove, and the installation cavity and the vertical through groove are arranged in a staggered manner;
[0014] Clamping blocks are respectively arranged on both sides of the temperature sensor. The clamping blocks can move up and down along the height direction of the vertical through groove, and the clamping blocks can be installed in the installation cavity.
[0015] Further, a positioning pin is provided on the front side of the outer cylinder. The positioning pin is used to position and install the outer cylinder on the die-casting mold of the die-casting machine.
[0016] Compared with the prior art, one of the above technical solutions has the following beneficial effects:
[0017] By means of the inner cylinder, the injection passage, the liquid inlet, the outer cylinder, the adapter, the oil inlet passage, the oil drain passage, the temperature sensor and the spiral heat conduction passage, the inner cylinder is heated before adding the molten metal, avoiding large deformation or even cracking and damage of the inner cylinder due to the alternating hot and cold under the high temperature of the molten metal. Further, through the first exhaust passage, the second exhaust passage and the circulation joint, not only can the air in the injection passage be discharged, avoiding defects such as air holes and cavities in the die-castings and being beneficial to improving the production quality of the die-castings, but also the molten metal extruded from the second exhaust passage can be returned to the molten metal supply place to avoid waste of raw materials. Description of the Drawings
[0018] Figure 1 is a schematic structural diagram of a die-casting machine barrel according to one embodiment of the present invention;
[0019] Figure 2 is Figure 1 an enlarged view of part A of
[0020] Figure 3 is a schematic structural view of a variable pitch spiral heat conduction channel of one embodiment of the present utility model;
[0021] Figure 4 is Figure 3 an enlarged view of position B of;
[0022] Wherein: inner cylinder body 1, injection channel 11, liquid inlet 12, first exhaust channel 13, diversion groove 14, outer cylinder body 2, adapter 21, second exhaust channel 22, oil inlet channel 23, oil discharge channel 24, vertical through groove 25, installation cavity 26, positioning pin 27, circulation joint 3, exhaust pipe 31, return pipe 32, temperature sensor 4, clamping block 41, spiral heat conduction channel 5. Specific embodiments
[0023] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.
[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", "inner side", "outer side", "inner end", "outer end", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features, which are used to distinguish and describe the features, without order or importance. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is more than two.
[0025] In one embodiment of the present utility model, as Figures 1-4As shown in the figure, a shot sleeve of a die-casting machine includes an inner cylinder body 1, an outer cylinder body 2, a circulation joint 3 and a temperature sensor 4; the inner cylinder body 1 is installed inside the outer cylinder body 2, the inner cylinder body 1 is provided with a shot passage 11, a liquid inlet 12 and a first exhaust passage 13, the first exhaust passage 13 communicates with the front end of the shot passage 11, the first exhaust passage 13 is used for discharging the air in the shot passage 11, and the liquid inlet 12 communicates with the rear end of the shot passage 11; the outer cylinder body 2 is provided with a transfer interface 21, a second exhaust passage 22, an oil inlet passage 23 and an oil drain passage 24, and a spiral heat conduction passage 5 is provided between the inner wall of the outer cylinder body 2 and the outer wall of the inner cylinder body 1, one end of the spiral heat conduction passage 5 communicates with the oil inlet passage 23, and the other end of the spiral heat conduction passage 5 communicates with the oil drain passage 24; one end of the transfer interface 21 communicates with the liquid inlet 12, the other end of the transfer interface 21 is used for installing a connector of a molten metal supply pipe, one end of the second exhaust passage 22 communicates with the first exhaust passage 13, the other end of the second exhaust passage 22 communicates with the circulation joint 3, the circulation joint 3 is installed on the outer cylinder body 2, the circulation joint 3 is used for discharging the air in the shot passage 11 and returning the discharged molten metal to the molten metal supply place, the temperature sensor 4 is installed on the outer cylinder body 2, and the temperature sensor 4 is used for detecting the temperature of the inner cylinder body 1.In this embodiment, the outer wall of the inner cylinder 1 is provided with a spiral depression. After the inner cylinder 1 is installed inside the outer cylinder 2, a spiral heat conduction channel 5 is formed between the spiral depression and the inner wall of the outer cylinder 2. And the first exhaust channel 13 is communicated with the second exhaust channel 22. One end of the spiral heat conduction channel 5 is communicated with the oil inlet channel 23, and the other end of the spiral heat conduction channel 5 is communicated with the oil discharge channel 24. Then the circulation joint 3 and the temperature sensor 4 are respectively installed on the outer cylinder 2, so that the circulation joint 3 is communicated with the second exhaust channel 22, and the end of the temperature sensor 4 is located inside the inner cylinder 1. Finally, the joint of the molten metal supply pipe is installed on the adapter 21, so as to facilitate the transportation of molten metal. During operation, heat-conducting oil is added to the oil inlet channel 23, and the heat-conducting oil enters the spiral heat conduction channel 5. At this time, the heat-conducting oil winds around the outer circumference of the inner cylinder 1 through the spiral heat conduction channel 5, so as to heat the inner cylinder 1. Then the heat-conducting oil is discharged to the outside from the oil discharge channel 24. During the heating process of the heat-conducting oil, the temperature sensor 4 detects the temperature of the inner cylinder 1. If the temperature of the inner cylinder 1 reaches the set value, the transportation of the heat-conducting oil is stopped. Then a set amount of molten metal is transported to the injection channel 11 by the molten metal supply through the adapter 21 and the liquid inlet 12. During the transportation of the molten metal, part of the air in the injection channel 11 is discharged to the circulation joint 3 through the first exhaust channel 13 and the second exhaust channel 22, and is discharged to the outside by the circulation joint 3. Then when the injection rod injects the molten metal in the injection channel 11 into the die-casting mold, the injection head of the injection rod moves from the rear end to the front end of the inner cylinder 1. While injecting the molten metal, the injection head discharges the remaining air in the injection channel 11 from the first exhaust channel 13 and the second exhaust channel 22, and is discharged to the outside by the circulation joint 3. And a small amount of molten metal extruded from the second exhaust channel 22 flows back to the molten metal supply through the circulation joint 3; Through the inner cylinder 1, the injection channel 11, the liquid inlet 12, the outer cylinder 2, the adapter 21, the oil inlet channel 23, the oil discharge channel 24, the temperature sensor 4 and the spiral heat conduction channel 5 in this application, the inner cylinder 1 is heated before adding molten metal, so as to avoid large deformation or even cracking damage of the inner cylinder 1 due to the alternating heat and cold under the high temperature of the molten metal. Further, through the first exhaust channel 13, the second exhaust channel 22 and the circulation joint 3, not only can the air in the injection channel 11 be discharged, avoiding defects such as air holes and cavities in the die-casting parts, which is beneficial to improving the production quality of the die-casting parts, but also the molten metal extruded from the second exhaust channel 22 can be returned to the molten metal supply, so as to avoid waste of raw materials.
[0026] As Figure 3As shown, the pitch of the spiral heat conduction channel 5 gradually decreases along the liquid infusion direction of the injection channel 11. In this embodiment, the spiral heat conduction channel 5 is set as a variable pitch structure, specifically, the pitch of the spiral heat conduction channel 5 gradually decreases along the liquid infusion direction of the injection channel 11. During operation, the heat-conducting oil enters from the outer wall at the rear end of the outer cylinder 2 and moves towards the front end of the outer cylinder 2. The temperature of the heat-conducting oil is higher when it is at the rear end of the inner cylinder 1 and lower when it is at the front end of the inner cylinder 1. Therefore, the pitch at the rear end of the spiral heat conduction channel 5 is set larger, and the pitch at the front end of the spiral heat conduction channel 5 is set smaller, so as to make the heating temperatures at the front end and the rear end of the inner cylinder 1 more uniform.
[0027] As Figure 1 and Figure 3 shown, a diversion groove 14 is provided inside the inner cylinder 1. In this embodiment, a plurality of the diversion grooves 14 are formed by recessing the inner wall of the inner cylinder 1. The diversion grooves 14 are of an arc structure and are inclined, which is beneficial to improving the fluidity of the molten metal.
[0028] As Figure 3 shown, the circulation joint 3 is provided with an exhaust pipe 31 and a return pipe 32. The exhaust pipe 31 is arranged vertically, and the return pipe 32 is arranged horizontally. In this embodiment, the circulation joint 3 is installed on the outer periphery of the outer cylinder 2, and the circulation joint 3 is communicated with the second exhaust channel 22. During operation, the air discharged from the second exhaust channel 22 is discharged upward through the vertical exhaust pipe 31, and the extruded molten metal flows back to the molten metal supply through the horizontally arranged return pipe 32, which is convenient and fast.
[0029] As Figure 2 and Figure 4 shown, the outer cylinder 2 is provided with a vertical through groove 25 and an installation cavity 26. The installation cavity 26 is communicated with the vertical through groove 25, and the installation cavity 26 and the vertical through groove 25 are arranged in a staggered manner; clamping blocks 41 are respectively arranged on both sides of the temperature sensor 4. The clamping blocks 41 can move up and down along the height direction of the vertical through groove 25, and the clamping blocks 41 can be installed in the installation cavity 26. In this embodiment, the number of the vertical through groove 25, the installation cavity 26 and the clamping blocks 41 is two. When installing the temperature sensor 4 on the outer cylinder 2, align the two clamping blocks 41 with the vertical through groove 25, then move the clamping blocks 41 along the height direction of the vertical through groove 25 until the clamping blocks 41 are at the same horizontal plane as the installation cavity 26, and then rotate the temperature sensor 4 around its axis. At this time, the two clamping blocks 41 rotate along with it and are placed in the installation cavity 26. At this time, the two clamping blocks 41 are arranged in a staggered manner with the vertical through groove 25, so that they cannot be disengaged. During disassembly, just operate in the reverse direction. The disassembly and assembly are convenient and fast, and the disassembly and assembly efficiency is high.
[0030] AsFigure 3 As shown, a positioning pin 27 is provided on the front side of the outer cylinder body 2, and the positioning pin 27 is used to position and install the outer cylinder body 2 on the die-casting mold of the die-casting machine. In this embodiment, two positioning pins 27 are provided on the front side of the outer cylinder body 2. Through the two positioning pins 27, the die-casting machine barrel can be quickly and accurately installed on the die-casting mold, which is convenient and fast.
[0031] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0032] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.
Claims
1. A die casting machine barrel, characterized in that: It includes an inner cylinder, an outer cylinder, a circulation joint and a temperature sensor; The inner cylinder is installed inside the outer cylinder, and the inner cylinder is provided with an injection channel, a liquid inlet and a first exhaust channel, the first exhaust channel is connected to the front end of the injection channel, and the first exhaust channel is used to exhaust the air in the injection channel, and the liquid inlet is connected to the rear end of the injection channel; The outer cylinder is provided with an adapter, a second exhaust channel, an oil inlet channel and an oil discharge channel, and a spiral heat conduction channel is provided between the inner wall of the outer cylinder and the outer wall of the inner cylinder, one end of the spiral heat conduction channel is connected to the oil inlet channel, and the other end of the spiral heat conduction channel is connected to the oil discharge channel; One end of the adapter is connected to the liquid inlet, and the other end of the adapter is used to install the adapter of the molten metal supply pipe. One end of the second exhaust channel is connected to the first exhaust channel, and the other end of the second exhaust channel is connected to the circulation joint. The circulation joint is installed on the outer cylinder. The circulation joint is used to exhaust the air in the injection channel and return the exhausted molten metal to the molten metal supply. The temperature sensor is installed on the outer cylinder, and the temperature sensor is used to detect the temperature of the inner cylinder.
2. A die casting machine barrel according to claim 1, characterized in that: The pitch of the spiral heat-conducting channel gradually decreases along the infusion direction of the injection channel.
3. The die casting machine barrel according to claim 1, characterized in that: A guide groove is arranged inside the inner cylinder.
4. The die casting machine barrel according to claim 1, characterized in that: The circulation joint is provided with an exhaust pipe and a return pipe, wherein the exhaust pipe is arranged vertically and the return pipe is arranged horizontally.
5. The die casting machine barrel according to claim 1, characterized in that: The outer cylinder is provided with a vertical through slot and a mounting cavity, the mounting cavity is communicated with the vertical through slot, and the mounting cavity and the vertical through slot are staggered; A clamping block is respectively arranged on both sides of the temperature sensor. The clamping block can move up and down along the height direction of the vertical through slot, and the clamping block can be installed in the installation cavity.
6. The die casting machine barrel according to claim 1, characterized in that: A positioning pin is provided on the front side of the outer cylinder, and the positioning pin is used to position the outer cylinder and install it on the die-casting mold of the die-casting machine.