Hot runner system capable of realizing multi-point injection molding balance

Abstract

The utility model provides a hot runner system capable of realizing multi-point injection molding balance, which is characterized in that a main nozzle and a splitter plate which are communicated are arranged, an injection molding inlet is formed in one end, deviating from the splitter plate, of the main nozzle, and a plurality of first runners are formed in the main nozzle; the multiple first runners are arranged at intervals and communicate with the injection molding inlet, multiple second runners are distributed in the splitter plate at intervals, one end of each second runner communicates with the corresponding first runner, and the other end of each second runner correspondingly communicates with a hot nozzle; in the operation process, the form of the interior of the main nozzle is different from that of a main runner conventionally arranged, the multiple first runners are arranged in a separated mode and all communicate with the injection molding inlet, and injection molding fluid at the inlet with the maximum injection molding pressure can be directly and evenly separated into all the first runners; and therefore, the injection molding fluid can be balanced in the hot runner system, and the injection molding effect is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runners, in particular to a hot runner system capable of realizing multi-point injection molding balance. Background Art

[0002] At present, hot runner systems are widely used in the injection molding industry. Compared with other injection molding methods, plastic products molded by hot runner systems have higher quality, and hot runner systems have the advantages of saving raw materials, improving production efficiency, and high degree of automation.

[0003] However, in the traditional hot runner system, a main channel is arranged in the main nozzle, and the branch channel is arranged in the diversion plate. When performing diversion, the main channel is generally radially divergent to form multiple branch channels. This leads to higher pressure at the diversion corner. Affected by the injection pressure of the injection molding machine, it is difficult to balance the flow of glue in each branch channel, which easily leads to an increase in the defective rate of products with multi-point injection molding. Utility Model Content

[0004] The purpose of the utility model is to provide a hot runner system that can achieve balanced multi-point injection molding, so as to solve the problem mentioned in the above background technology that the traditional hot runner system is difficult to balance the flow of glue in each branch runner, which easily leads to an increase in the defective rate of multi-point injection molding products.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hot runner system capable of achieving balanced multi-point injection molding, comprising: a main nozzle and a diverter plate which are connected to each other, the main nozzle having an injection molding inlet at one end away from the diverter plate, a plurality of first flow channels being arranged inside the main nozzle, the plurality of first flow channels being separated and connected to the injection molding inlet, a plurality of second flow channels being distributed at intervals inside the diverter plate, each of the second flow channels being connected to the corresponding first flow channel at one end, and being connected to a hot nozzle at the other end.

[0006] Optionally, the plurality of first flow channels are distributed in a concentrated manner along the central axis of the main nozzle at one end close to the injection inlet, and are distributed discretely along the central axis of the main nozzle at the other end.

[0007] Optionally, the plurality of first flow channels are evenly distributed around the axis of the main nozzle or are symmetrically distributed in pairs along the central axis of the main nozzle.

[0008] Optionally, an inclined angle between the first flow channel and the central axis of the main nozzle is 15°-75°.

[0009] Optionally, a central groove is formed at the center of one end of the main nozzle away from the injection inlet, and the central groove is located between the plurality of first flow channels.

[0010] Optionally, a first heater is arranged around the circumferential surface of the main nozzle.

[0011] Optionally, one end of the first flow channel away from the injection inlet is bent and extended in a direction perpendicular to the diverter plate, and is connected to the corresponding second flow channel.

[0012] Optionally, a plurality of the second flow channels are evenly distributed inside the diverter plate and are bent in a Z-shape to pass through the diverter plate.

[0013] Optionally, it also includes: a first fixed mold, which is fixedly arranged on the outside of the main nozzle; a second fixed mold, which is fixedly connected to the first fixed mold, and the second fixed mold is fixedly arranged on the outside of the diverter plate and fixedly connected to the hot nozzle.

[0014] Optionally, it also includes: a cylinder and a valve needle corresponding to the hot nozzle one by one, the cylinder slidingly cooperates with the first fixed mold, the valve needle sequentially penetrates the diverter plate, the second flow channel and the hot nozzle, and slides in a sealed manner with the second flow channel through a valve needle sleeve; driven by the cylinder, the valve needle can slide close to or away from the gate of the hot nozzle to turn on and off the injection fluid inside the hot nozzle.

[0015] Optionally, the hot nozzle is fixedly connected to a second heater.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] In the utility model, a main nozzle and a diverter plate are connected to each other, the main nozzle has an injection inlet at one end away from the diverter plate, a plurality of first flow channels are provided inside the main nozzle, the plurality of first flow channels are separated and connected to the injection inlet, a plurality of second flow channels are spaced apart inside the diverter plate, each of the second flow channels is connected to the corresponding first flow channel at one end, and the other end is connected to a corresponding hot nozzle; during operation, the interior of the main nozzle is different from the conventional form of setting one main flow channel, but adopts a plurality of first flow channels separated and connected to the injection inlet, the injection fluid at the inlet with the largest injection pressure can be directly and evenly separated into each of the first flow channels, so that the injection fluid can be balanced in the hot runner system, which greatly improves the injection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.

[0019] In the figure: 1 - first fixed mold, 2 - second fixed mold, 3 - main nozzle, 4 - manifold, 5 - injection inlet, 6 - first flow channel, 7 - second flow channel, 8 - cylinder, 9 - valve needle, 10 - hot nozzle, 11 - gate, 12 - first heater, 13 - second heater. DETAILED DESCRIPTION

[0020] The scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0022] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0023] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0024] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] Please refer to Figure 1 The utility model is a hot runner system that can achieve multi-point injection balance, including: a main nozzle 3 and a diverter plate 4 that are connected, the main nozzle 3 has an injection inlet 5 at one end away from the diverter plate 4, and a plurality of first flow channels 6 are opened inside the main nozzle 3, and the plurality of first flow channels 6 are separated and connected to the injection inlet 5. A plurality of second flow channels 7 are distributed inside the diverter plate 4 at intervals, and each of the second flow channels 7 is connected to the corresponding first flow channel 6 at one end, and is connected to a hot nozzle 10 at the other end.

[0027] Specifically, the main nozzle 3 is arranged along the height direction, and its top is connected to the equipment carrying the molten plastic, and the bottom of the main nozzle 3 is connected to the diverter plate 4, that is, the top of the main nozzle 3 has an injection inlet 5, and the bottom of the main nozzle 3 is distributed with multiple injection outlets. When the injection fluid passes through the inside of the main nozzle 3, it can be directly and evenly divided into multiple portions, avoiding the problem of uneven glue flow caused by insufficient pressure.

[0028] During operation, the interior of the main nozzle 3 is different from the conventional form of a main flow channel. Instead, it is separated by multiple first flow channels 6 and connected to the injection inlet 5. The injection fluid at the inlet with the highest injection pressure can be directly and evenly separated into each of the first flow channels 6, so that the injection fluid can flow in a balanced manner in the hot runner system, greatly improving the injection effect.

[0029] In one embodiment of the present invention, the plurality of first flow channels 6 are distributed together along the central axis of the main nozzle 3 at one end close to the injection inlet 5 , and are distributed discretely along the central axis of the main nozzle 3 at the other end.

[0030] Specifically, since the injection inlet 5 and the injection outlet are respectively located at the top and bottom of the main nozzle 3, the distribution form of the multiple first flow channels 6 is set to be gathered at one end and discrete at the other end, which can be understood as a trumpet-shaped dispersed arrangement, which can reduce the pressure of the injection fluid flowing inside the first flow channel 6, making the injection fluid flow in the hot runner system more balanced and smooth, greatly improving the injection molding effect.

[0031] In one embodiment of the present invention, the plurality of first flow channels 6 are evenly distributed around the axis of the main nozzle 3 or are symmetrically distributed in pairs along the central axis of the main nozzle 3 .

[0032] Specifically, in order to make the injection pressure of the injection fluid in each of the first flow channels 6 more balanced, the present application may evenly distribute the plurality of first flow channels 6 with the axis of the main nozzle 3 as the center, or may symmetrically distribute the plurality of first flow channels 6 in pairs along the central axis of the main nozzle 3 to achieve balanced glue flow.

[0033] In one embodiment of the present invention, the inclined angle between the first flow channel 6 and the central axis of the main nozzle 3 is 15°-75°.

[0034] Specifically, each of the first flow channels 6 is tilted at one end close to the injection inlet 5, which not only facilitates the opening of multiple first flow channels 6, but also avoids unbalanced injection caused by excessive pressure at the connection between the injection inlet 5 and the first flow channel 6; the larger the tilt angle between the first flow channel 6 and the central axis of the main nozzle 3, the more first flow channels 6 can be set, the smaller the tilt angle between the first flow channel 6 and the central axis of the main nozzle 3, the smaller the pressure at the connection between the injection inlet 5 and the first flow channel 6, and the more balanced the injection fluid in the hot runner system. Therefore, setting the tilt angle between the first flow channel 6 and the central axis of the main nozzle 3 to 15°-75° can avoid the production of defective products due to injection pressure and greatly improve the injection effect.

[0035] In one embodiment of the present invention, a central groove is formed at the center of one end of the main nozzle 3 away from the injection inlet 5 , and the central groove is located between the plurality of first flow channels 6 .

[0036] Specifically, since the injection fluid in the hot runner system is a high-temperature molten plastic, if the temperature of the injection fluid is not enough, it will easily lead to problems with poor flow in the hot runner system. Therefore, the present application provides a center groove at the center of one end of the main nozzle 3 away from the injection inlet 5. The center groove is located between the multiple first flow channels 6, which can avoid the problem of poor flow of the glue due to heat loss.

[0037] In one embodiment of the present invention, a first heater 12 is disposed around the circumference of the main nozzle 3 .

[0038] Specifically, the main nozzle 3 is fixedly connected to the first heater 12, which can avoid the problem of poor glue flow caused by insufficient temperature of the injection fluid, and the first heater 12 is arranged around the circumferential surface of the main nozzle 3, which can wrap multiple first flow channels 6 at one time. Therefore, there is no need to set a heater for each second flow channel 7 on the diverter plate 4, which saves production costs to a great extent.

[0039] In one embodiment of the present invention, one end of the first flow channel 6 away from the injection inlet 5 is bent and extended in a direction perpendicular to the diverter plate 4 , and is connected to the corresponding second flow channel 7 .

[0040] Specifically, one end of the first flow channel 6 away from the injection inlet 5 is bent and extended in a direction perpendicular to the diverter plate 4. It can be understood that the outlet of the first flow channel 6 in the main nozzle 3 is set in a vertical form, which not only makes the glue discharge smoother and more uniform, but also connects the outlet of the vertically arranged first flow channel 6 with the inlet of the vertically arranged second flow channel 7, which can avoid glue leakage at the connection point to a great extent, and makes the injection fluid flow more smoothly inside the first flow channel 6 and the second flow channel 7, thereby greatly improving the injection efficiency.

[0041] In one embodiment of the present invention, a plurality of the second flow channels 7 are evenly distributed inside the diverter plate 4 and are bent in a Z-shape to penetrate the diverter plate 4 .

[0042] Specifically, in order to separate the multiple hot nozzles 10 from each other so that the multiple injection points do not interfere with each other when processing plastic products, the present application evenly distributes the multiple second flow channels 7 inside the diverter plate 4, and bends in a Z shape to pass through the diverter plate 4, which can not only achieve multi-point injection molding balance, but also can perform injection molding of multiple products at the same time, greatly improving the injection molding efficiency.

[0043] One embodiment of the utility model further includes: a first fixed mold 1, which is fixedly arranged on the outside of the main nozzle 3; a second fixed mold 2, which is fixedly connected to the first fixed mold 1, and the second fixed mold 2 is fixedly arranged on the outside of the diverter plate 4 and fixedly connected to the hot nozzle 10.

[0044] Specifically, the outer sides of the main nozzle 3, the manifold 4 and the hot nozzle 10 are fixedly connected to different fixed molds, which can not only avoid heat loss, but also install different accessories for the entire hot runner system, such as heaters or cylinder accessories, valve needle accessories, etc.; and the assembly is more stable, and it can also avoid the damage of important components in the hot runner system due to bumps.

[0045] One embodiment of the utility model further includes: a cylinder 8 and a valve needle 9 corresponding one to one with the hot nozzle 10, the cylinder 8 slidingly cooperates with the first fixed mold 1, the valve needle 9 sequentially penetrates the diverter plate 4, the second flow channel 7 and the hot nozzle 10, and is sealed and slidably cooperated with the second flow channel 7 through the valve needle sleeve; driven by the cylinder 8, the valve needle 9 can slide close to or away from the gate 11 of the hot nozzle 10 to open and close the injection fluid inside the hot nozzle 10.

[0046] Specifically, the first fixed mold 1 is connected to the cylinder 8, and the first fixed mold 1 is provided with two air flow channels, which are respectively connected to the two sides of the piston inside the cylinder 8. When the two air flow channels are working respectively, the piston inside the cylinder 8 can slide back and forth along the height direction; at this time, the valve needle 9 fixedly connected to the piston also slides close to or away from the gate 11 of the hot nozzle 10 at the same time to turn on and off the injection fluid inside the hot nozzle 10, thereby avoiding the occurrence of wire drawing at the gate position during the injection molding process, and improving the injection molding effect.

[0047] In one embodiment of the present invention, the hot nozzle 10 is fixedly connected to a second heater 13 .

[0048] Specifically, the hot nozzle 10 is fixedly connected to the second heater 13, so as to avoid the problem of poor fluid flow caused by insufficient temperature of the injection fluid, thereby greatly improving the injection molding effect.

[0049] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A hot runner system capable of achieving multi-point injection balance, characterized in that: include: A main nozzle (3) and a flow divider (4) are connected, the main nozzle (3) has an injection inlet (5) at one end facing away from the flow divider (4), a plurality of first flow channels (6) are provided inside the main nozzle (3), the plurality of first flow channels (6) are separately arranged and are all connected to the injection inlet (5), a plurality of second flow channels (7) are spaced apart inside the flow divider (4), each of the second flow channels (7) is connected to the corresponding first flow channel (6) at one end, and is connected to a corresponding hot nozzle (10) at the other end.

2. The hot runner system capable of achieving multi-point injection balance according to claim 1, characterized in that: The plurality of first flow channels (6) are distributed in a cluster along the central axis of the main nozzle (3) at one end close to the injection inlet (5), and are distributed discretely along the central axis of the main nozzle (3) at the other end.

3. The hot runner system capable of achieving multi-point injection balance according to claim 2, characterized in that: The plurality of first flow channels (6) are evenly distributed around the axis of the main nozzle (3) or symmetrically distributed in pairs along the central axis of the main nozzle (3).

4. The hot runner system capable of achieving multi-point injection balance according to claim 2, characterized in that: The inclined angle between the first flow channel (6) and the central axis of the main nozzle (3) is 15°-75°.

5. The hot runner system capable of achieving balanced multi-point injection molding according to claim 2, characterized in that: A central groove is provided at the center of one end of the main nozzle (3) away from the injection inlet (5), and the central groove is located between the plurality of first flow channels (6).

6. The hot runner system capable of achieving multi-point injection balance according to claim 2, characterized in that: A first heater (12) is arranged around the circumferential surface of the main nozzle (3).

7. The hot runner system capable of achieving balanced multi-point injection molding according to any one of claims 1 to 6, characterized in that: One end of the first flow channel (6) facing away from the injection inlet (5) is bent and extended in a direction perpendicular to the diverter plate (4) and is connected to the corresponding second flow channel (7).

8. The hot runner system capable of achieving balanced multi-point injection molding according to claim 7, characterized in that: A plurality of the second flow channels (7) are evenly distributed inside the diverter plate (4) and are bent in a Z-shape to penetrate the diverter plate (4).

9. The hot runner system capable of achieving multi-point injection balance according to claim 8, characterized in that: Also includes: A first fixed mold (1) which is fixedly arranged outside the main nozzle (3); The second fixed mold (2) is fixedly connected to the first fixed mold (1); the second fixed mold (2) is fixedly arranged on the outside of the diverter plate (4) and is fixedly connected to the hot nozzle (10).

10. The hot runner system capable of achieving multi-point injection balance according to claim 9, characterized in that: Also includes: A cylinder (8) and a valve needle (9) corresponding one to one with the hot nozzle (10), the cylinder (8) being in sliding cooperation with the first fixed mold (1), the valve needle (9) sequentially passing through the manifold (4), the second flow channel (7) and the hot nozzle (10), and being in sealing and sliding cooperation with the second flow channel (7) through the valve needle sleeve; Driven by the cylinder (8), the valve needle (9) can slide close to or away from the gate (11) of the hot nozzle (10) to open or close the injection fluid inside the hot nozzle (10).

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