A multi-gate injection device and a gating system

Abstract

The present invention discloses a multi-gate injection device, including an injection nozzle and a hot runner. One end of the hot runner is connected to the injection nozzle. Wherein, the hot runner includes a fixed template and a manifold plate disposed within the fixed template. The manifold plate is provided with a plurality of hot gates embedded in the fixed template. A centering ring for adjusting the position of the hot gate is sleeved on the end of each of the plurality of hot gates. In this embodiment, a gating system applying the above injection device is also provided. The purpose of the present invention is to provide a multi-gate injection device and a gating system, which solve the problem in the prior art that the openings of the respective hot gates cannot be accurately aligned with the bushings, resulting in uneven ejection flow rates of the respective hot gates and affecting the safety of equipment use.

Description

Technical Field

[0001] The present invention relates to the technical field of alloy casting, and particularly relates to a multi-gate injection device and a pouring system. Background Art

[0002] The pouring and forming principle of semi-solid magnesium alloy is to add magnesium particles into the barrel, and through the rotation of the screw and the heating of the outer wall of the barrel, the magnesium alloy particles are made into a semi-solid state. Then the injection seat moves forward to make the nozzle close to the gate of the mold. Next, pressure oil is introduced into the injection cylinder to make the screw advance forward, so as to inject the molten material into the relatively low-temperature closed mold at a very high pressure and extremely fast speed. After pressure holding and cooling, it is solidified and formed, and then the mold can be opened to take out the product.

[0003] The single-channel injection device has only one hot gate. To ensure that there is no semi-solid magnesium alloy melt remaining in the hot gate, it is only necessary to accurately align the opening of the hot gate with the opening on the gate bushing. However, on the other hand, for a multi-channel injection device with multiple hot gates, to achieve accurate alignment between each hot gate and the corresponding opening on the gate bushing to ensure that there is no melt retention, the process requirements are difficult. Moreover, during the application process, it is also impossible to ensure that the hot gate and the gate bushing will not be misaligned, which will easily cause the injection device to malfunction and ultimately affect the product quality.

[0004] It can be seen that for a multi-gate injection device, it is very difficult to ensure 100% accurate alignment between each hot gate and the corresponding opening on the bushing during equipment manufacturing. During use, it may cause a large difference in the injection flow of each hot gate, and the safety performance of the equipment and the product will be greatly affected. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-gate injection device to solve the problem in the prior art that it is impossible to accurately align the openings of each hot gate with the corresponding bushings, resulting in uneven ejection flow of each hot gate and affecting the safety of equipment use.

[0006] To achieve the above purpose, the technical solution of the present invention is as follows:

[0007] A multi-gate injection device includes an injection nozzle and a hot runner. One end of the hot runner is connected to the injection nozzle. Among them, the hot runner includes a fixed template and a manifold plate arranged in the fixed template. The manifold plate has a plurality of hot gates embedded in the fixed template, and a centering ring for adjusting the position of the hot gate is sleeved at the end of each of the plurality of hot gates.

[0008] A multi-gate injection device of the present invention is provided with an alignment ring on each of a plurality of hot gates, enabling adjustment of the positions of the respective hot gates. After the fixed template and the manifold are assembled, the storage positions of the respective hot gates are uncertain. The alignment ring can limit the hot gate to a position or a range, ensuring that the semi-solid alloy material passing through the hot gate can completely shoot out from the opening corresponding to the hot gate, solving the problem that the hot gate cannot be aligned with the outlet of the semi-solid alloy material, and further ensuring the safety of the equipment.

[0009] Further, a plurality of mounting grooves located on the end face of the fixed template and positioning gland covers corresponding to the mounting grooves are provided on the fixed template, and the alignment ring is located in the area formed by the mounting groove and the positioning gland cover.

[0010] Further, the positioning cover plate has a flared opening, and the flared opening is arranged in alignment with the hot gate.

[0011] Further, there is a first distance between the alignment ring and the mounting groove, and a second distance between the flared opening and the hot gate, and the first distance is less than the second distance.

[0012] Further, the hot gate is a hot gate with a gradually narrowing end, and the alignment ring is a concave-ring-shaped alignment ring.

[0013] Further, a first temperature control component is arranged on the outer periphery of the hot gate. The first temperature control component includes:

[0014] A first thermocouple, which is arranged on the fixed template; and

[0015] A first heater, which is wound around the outer peripheral wall of the hot gate.

[0016] Further, multiple layers of third heaters are arranged on the outer surface of the manifold.

[0017] Further, a cooling ring is arranged outside the connection between the injection nozzle and the hot runner.

[0018] Further, a second temperature control component is arranged on the outer side of the injection nozzle. The second temperature control component includes:

[0019] A second thermocouple, which is arranged on the outer wall of the injection nozzle; and

[0020] A second heater, which is wound around the outer periphery of the injection nozzle.

[0021] The present invention also provides a pouring system, including:

[0022] A pouring mold, which is provided with a pouring port;

[0023] For the multi-gate injection device as described above, the hot runner end is inserted into the pouring gate so that the hot gate is close to the cavity of the pouring mold. Description of the Drawings

[0024] Figure 1 FIG. 1 is a schematic structural diagram of a multi-gate injection device provided by an embodiment of the present invention;

[0025] Figure 2 FIG. 2 is a schematic partial structural diagram of a multi-gate injection device provided by an embodiment of the present invention;

[0026] Figure 3 FIG. 3 is a schematic combined structural diagram of an injection nozzle and a cooling ring in an embodiment of the present invention;

[0027] Figure 4 FIG. 4 is a schematic structural diagram of a pouring system provided by an embodiment of the present invention. Detailed Embodiments

[0028] A multi-gate injection device and an injection system of the present invention will be described in conjunction with the accompanying drawings.

[0029] As Embodiment 1 of the present invention:

[0030] In this embodiment, the material poured in the multi-gate injection device is a magnesium alloy material, and the flow state of the magnesium alloy material in the multi-gate injection device described in this embodiment is semi-solid.

[0031] In addition, in this embodiment, scenarios where other materials are used are not excluded.

[0032] As Figure 1 shown, this embodiment provides a multi-gate injection device, including an injection nozzle 100 and a hot runner 200. One end of the hot runner 200 is connected to the injection nozzle 100, and the magnesium alloy material enters the hot runner 200 from the injection nozzle 100. The hot runner 200 is used for injecting the poured magnesium alloy material;

[0033] Among them, the hot runner 200 includes a fixed template 210 and a manifold 220 arranged in the fixed template 210. The manifold 220 has a plurality of hot gates 211 embedded in the fixed template 210, and a centering ring 212 for adjusting the position of the hot gate 211 is sleeved at the end of each of the plurality of hot gates 211.

[0034] In this embodiment, a multi-gate injection device is provided. By arranging an alignment ring 212 on each of the plurality of hot gates 211, the position of each hot gate 211 can be adjusted. After the fixed template 210 and the manifold plate 220 are assembled, the storage positions of the respective hot gates 211 are uncertain. The alignment ring 212 can limit the hot gate 211 to a position or a range, so as to ensure that the semi-solid alloy material passing through the hot gate 211 can completely shoot out from the opening corresponding to the hot gate 211, solve the problem that the hot gate 211 cannot be aligned with the ejection port of the semi-solid alloy material, and further ensure the safety of the equipment.

[0035] As Figures 1 to 2 shown, the alignment ring 212 is sleeved on the end of the hot gate 211. In order to position it, a plurality of mounting grooves 213 located on the end face of the fixed template 210 and positioning gland covers 214 corresponding to the mounting grooves 213 are provided on the fixed template 210. The alignment ring 212 is located in the area formed by the mounting groove 213 and the positioning gland cover 214 to ensure that the alignment ring 212 does not protrude outside the fixed template 210.

[0036] When the manifold plate 220 is combined with the fixed template 210, the alignment ring 212 can abut against the peripheral side wall of the provided mounting area, which is beneficial for positioning or adjusting the hot gate 211.

[0037] In addition, a fastener 215 is provided on the positioning gland cover 214. The fastener can be a fixing screw or a fixing bolt to fix the positioning gland cover 214 on the mounting groove 213 and clamp the alignment ring 212 so that the alignment ring 212 does not slide axially.

[0038] In the embodiment of the present invention, the positioning gland cover 214 has a flared opening 216. The flared opening 216 is arranged opposite to the hot gate 211, and the material passing through the hot gate 211 shoots out from the flared opening 216. The flared opening 216 is used to limit the ejection position and angle of the material of the hot gate 211.

[0039] As Figure 2 shown, there is a first distance 31 between the alignment ring 212 and the mounting groove 213, and a second distance 32 between the flared opening 216 and the hot gate 211. The first distance 31 is less than the second distance 32.

[0040] When the alignment ring 212 is not provided on the hot gate 211, the alignment between the hot gate 211 and the flared opening 216 may be inaccurate. For example, only a part of the hot gate 211 is aligned with the corresponding flared opening 216. When there is material ejection in the hot gate 211, part of the material will be blocked and retained in the hot gate 211.

[0041] Further, there is a first distance 31 between the centering ring 212 and the installation groove 213, and a second distance 32 between the flared opening 216 and the hot runner 211. In this embodiment, the first distance 31 refers to the distance between the outer wall of the centering ring 212 and the inner wall of the installation groove 213 after the centering ring 212 is installed on the hot runner 211, and the second distance 32 is the distance between the inner wall of the hot runner 211 and the inner wall of the flared opening 216 under the condition that the hot runner 211 is located within the flared opening 216.

[0042] Under the above conditions, no matter how the centering ring 212 adjusts its position within the installation groove 213, the hot runner 211 can always be completely placed within the flared opening 216.

[0043] In this embodiment, the flared opening 216 is in the shape of an open mouth with a gradually increasing inner diameter.

[0044] Preferably, the minimum inner diameter of the flared opening 216 is greater than the inner diameter of the hot runner 211.

[0045] In this embodiment, the hot runner 211 is a hot runner with a gradually narrowing end, and the centering ring 212 is a concave-ring-shaped centering ring.

[0046] In this embodiment, as Figure 1 shown, a first temperature control component 217 is provided on the outer periphery of the hot runner 211. The first temperature control component 217 includes:

[0047] A first thermocouple 218, which is provided on the fixed template 210; and

[0048] A first heater 219, which is wound around the outer peripheral wall of the hot runner 211.

[0049] The first thermocouple 218 is mainly used to measure the temperature of the hot tip 200, and to control the heating power of the first heater 219 according to the temperature condition, so as to control the temperature of the material flowing inside the hot runner and ensure that the material within the manifold 220 is in a semi-solid state.

[0050] Among them, thermocouples and heaters are common temperature measurement and heating components in the art. Those skilled in the art can select or customize them from the market according to actual needs, and will not further elaborate on them here. At the same time, it can be understood that the circuit connection design of the thermocouple and the heating coil belongs to a simple conventional design, and only needs to ensure that power can be supplied to both of them. It will not be further illustrated and described here, and those skilled in the art can make a simple design according to the actual situation.

[0051] In addition, a plug member 221 is provided on one side of the flow splitter plate 220. The plug member 221 is used to seal the hot runner channels in the flow splitter plate 220. Additionally, removing the plug member 221 can provide an interface for the flow splitter plate 220 to expand other hot runner channels.

[0052] A plurality of layers of third heaters 222 are arranged on the outer surface of the flow splitter plate 220. The third heaters 222 are used to heat the materials within the plate body of the flow splitter plate 220 to ensure that the materials here are in a semi-solid state.

[0053] In this embodiment, as Figure 1 or Figure 3 shown, a cooling ring 300 is externally provided at the connection between the injection nozzle 100 and the hot runner head 200.

[0054] Among them, the cooling ring 300 is installed at the connection between the hot runner head 200 and the injection nozzle 100. The cooling ring 300 serves as a connecting member between the hot runner and the injection nozzle 100, and has a clearance fit with both the hot runner head 200 and the injection nozzle 100.

[0055] On the other hand, a material blocking channel 310 is formed at the connection between the injection nozzle 100 and the cooling ring 300.

[0056] Generally speaking, the cooling ring 300 has a cooling channel 320. A cooling medium, such as water or air, is introduced into the cooling channel 320 to cool down the cooling ring 300. During the process where the material passes through the injection nozzle 100 and enters the hot runner head 200 via the cooling ring 300, some materials may enter the cooling ring 300 through the installation gap between the cooling ring 300 and the injection nozzle 100, resulting in the leakage of materials from the connection between the cooling ring 300 and the injection nozzle 100. If a material blocking channel 310 is provided, the leaked materials are stored in the material blocking channel 310. Utilizing the cooling effect of the cooling ring 300, the materials in the material blocking channel 310 solidify into a solid state, which is equivalent to blocking this gap, making it difficult for the materials to leak or overflow from this gap, thereby achieving the functions of sealing and leak prevention.

[0057] In addition, a material blocking channel 310 with the same function is formed at the connection between the flow splitter plate 220 and the cooling ring 300.

[0058] In this embodiment, a second temperature control component 101 is provided on the outer side of the injection nozzle 100. The second temperature control component 101 includes:

[0059] A second thermocouple 102, which is disposed on the outer wall of the injection nozzle 100; and

[0060] A second heater 103, which is wound around the outer periphery of the injection nozzle 100.

[0061] Among them, the second thermocouple 102 and the second heater 103 mainly function to control the temperature of the material flowing through the injection nozzle 100, and avoid the blockage caused by the solidification of the molten material at the injection nozzle 100.

[0062] As the second embodiment of the present invention:

[0063] This embodiment also provides a pouring system, as Figure 4 shown, including:

[0064] A pouring mold 10, with a pouring port 11 provided on the pouring mold 10;

[0065] Such as the multi-gate injection device described above, the end of the hot runner 200 is inserted into the pouring port 11, so that the hot gate 211 is close to the cavity of the pouring mold 10.

[0066] For the pouring system provided in this embodiment, compared with the ordinary nozzle injection method, a large part of the cold runner can be reduced when designing the mold, which can save 30% to 50% of the mold material. At the same time, there is no need for subsequent processing of cutting the sprue material, reducing the recycling cost; by controlling the state of the molten material entering the mold through the hot runner, point pouring is realized to make the temperature and pressure of the material in the cavity uniform, improving the deformation of large and thin parts. The flow length ratio of the cavity is reduced, making the filling easier to complete, and reducing the under-injection at the end of the product. The pouring temperature can be strictly controlled to effectively control the quality of the semi-solid molten material; in addition, the hot runner 200 can be standardized, and various different length specifications and outlet diameter specifications can be selected according to different mold depths and product structures, with good interchangeability.

[0067] According to the disclosure and teachings of the above specification, those skilled in the art of the present invention can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A multi-gate injection device, characterized in that, it includes an injection nozzle, and a second temperature control component is arranged on the outer side of the injection nozzle; a hot runner, one end of the hot runner is connected to the injection nozzle; wherein, the hot runner includes a fixed template and a manifold plate arranged in the fixed template, the manifold plate is provided with a plurality of hot gates embedded in the fixed template, and a centering ring for adjusting the position of the hot gate is sleeved at the end of each of the plurality of hot gates; a plurality of installation grooves located on the end face of the fixed template and positioning gland covers corresponding to the installation grooves are arranged on the fixed template, and the centering ring is located in the area formed by the installation groove and the positioning gland cover; when the manifold plate is combined with the fixed template, the centering ring can abut against the peripheral side wall of the installation area provided for it; the positioning gland cover has a flared opening, and the flared opening is arranged in alignment with the hot gate; a first distance exists between the outer wall of the centering ring and the inner wall of the installation groove, and a second distance exists between the inner wall of the flared opening and the inner wall of the hot gate, and the first distance is less than the second distance.

2. The multi-gate injection device according to claim 1, characterized in that, the hot gate is a hot gate with a gradually narrowing end, and the centering ring is a concave ring-shaped centering ring.

3. The multi-gate injection device according to claim 1, characterized in that, a first temperature control component is arranged on the outer periphery of the hot gate, and the first temperature control component includes: a first thermocouple, the first thermocouple is arranged on the fixed template; and a first heater, the first heater is wound around the outer peripheral wall of the hot gate.

4. The multi-gate injection device according to claim 1, characterized in that, multiple layers of third heaters are arranged on the outer surface of the manifold plate.

5. The multi-gate injection device according to claim 1, characterized in that, a cooling ring is arranged outside the connection between the injection nozzle and the hot runner.

6. The multi-gate injection device according to claim 1, characterized in that, the second temperature control component includes: a second thermocouple, the second thermocouple is arranged on the outer wall of the injection nozzle; and a second heater, the second heater is wound around the outer periphery of the injection nozzle.

7. A pouring system, characterized in that, it includes: a pouring mold, and a pouring port is arranged on the pouring mold; the multi-gate injection device according to any one of claims 1 to 6, and the end of the hot runner is inserted into the pouring port so that the hot gate is close to the cavity of the pouring mold.

Images