Hot runner system

Abstract

The utility model provides a hot runner system which comprises a splitter plate and a diaphragm heater, the splitter plate is provided with a first surface, a second surface and a plurality of runners penetrating through the first surface and the second surface, the first surface and the second surface are opposite, and the diaphragm heater is attached to the first surface and / or the second surface of the splitter plate. The first insulating layer is arranged on the substrate; the conductor layer and the resistance layer are arranged on the first insulating layer; the second insulating layer is arranged on the conductor layer and the resistance layer; the attaching area of the diaphragm heater is not smaller than 50% of the first surface and / or the second surface. The membrane heater is attached to the first surface and / or the second surface of the splitter plate, a heating wire groove does not need to be formed in the surface of the splitter plate, and the process cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runners, in particular to a hot runner system. Background Art

[0002] The existing heating method for the manifold is to bend the heating wire into a specific shape, process a heating wire groove of a corresponding shape on the surface of the manifold, and embed the heating wire into the manifold for heating. This heating method requires processing the heating wire groove on the manifold, which has high processing costs, and special equipment is required to press the heating wire into the manifold, which is inconvenient to assemble; subsequent maintenance and disassembly of the heating wire is also inconvenient; each heating zone is heated by two heating wires, and the heating uniformity needs to be further improved. Utility Model Content

[0003] The utility model aims to provide a hot runner system, in which a diaphragm heater is attached to a manifold, the diaphragm heater is a sheet structure, and is composed of two insulating layers and a conductor layer and a resistor layer arranged in the two insulating layers, thereby solving the problems of high cost and inconvenience caused by processing a heating wire groove on the manifold in the prior art.

[0004] In order to achieve one of the purposes of the utility model mentioned above, one embodiment of the utility model provides a hot runner system, including a manifold and a diaphragm heater, the manifold having a first surface and a second surface relative to each other, and a plurality of flow channels penetrating the first surface and the second surface, the diaphragm heater being attached to the first surface and / or the second surface of the manifold, and including a substrate, a first insulating layer arranged on the substrate, a conductor layer and a resistor layer arranged on the first insulating layer, and a second insulating layer arranged on the conductor layer and the resistor layer; the attachment area of ​​the diaphragm heater is not less than 50% of the first surface and / or the second surface.

[0005] As a further improvement of an embodiment of the utility model, it also includes a main nozzle and a hot nozzle;

[0006] The diverter plate is in an I-shape, and includes two transverse diverter portions and an incident portion connecting the two diverter portions. The main nozzle is connected to a first surface of the incident portion, and the hot nozzle is connected to a second surface of the diverter portion.

[0007] As a further improvement of an embodiment of the utility model, the diaphragm heaters are arranged at intervals along the length direction of the transversely arranged diversion portion.

[0008] As a further improvement of one embodiment of the utility model, the conductor layer includes a connecting wire and an interface, the connecting wire is connected to the resistance layer, the interface is used to connect to an external power supply, and the interface is arranged near one end of the shunt part away from the incident part.

[0009] As a further improvement of one embodiment of the utility model, it also includes a tubular heater sleeved on the hot nozzle and / or the main nozzle, and the tubular heater also includes a substrate, a first insulating layer arranged on the substrate, a conductor layer and a resistor layer arranged on the first insulating layer, and a second insulating layer arranged on the conductor layer and the resistor layer.

[0010] As a further improvement of an embodiment of the utility model, the resistance layer is composed of resistance wires, and the resistance wires are evenly distributed or unevenly distributed on the first insulating layer.

[0011] As a further improvement of an embodiment of the utility model, the resistance wires in the diaphragm heater are evenly distributed.

[0012] As a further improvement of an embodiment of the utility model, the resistance wires in the tubular heater are unevenly distributed.

[0013] As a further improvement of an embodiment of the utility model, the resistance wires of the tubular heater are distributed more densely at one end away from the diverter plate than at one end close to the diverter plate.

[0014] As a further improvement of an embodiment of the utility model, the substrate is a metal layer, the first insulating layer is a ceramic layer, and the second insulating layer is a glass layer.

[0015] One or more technical solutions provided by the utility model have at least the following technical effects or advantages:

[0016] In the hot runner system provided by the utility model, a diaphragm heater is used to heat the manifold plate. The diaphragm heater includes two insulating layers and a conductor layer and a resistor layer arranged between the insulating layers. The manifold plate is heated by generating heat by electrifying the resistor layer, so that the manifold plate can be heated evenly without the need to groove the manifold plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view of the hot runner system in an embodiment of the utility model.

[0018] Figure 2 It is a front view of the hot runner system in an embodiment of the utility model.

[0019] Figure 3 yes Figure 2 Schematic cross-sectional view along line AA.

[0020] Figure 4 yes Figure 1 Enlarged view of point B in the middle.

[0021] 1. Diverter plate; 11. Diverter part; 12. Incident part; 13. First surface; 14. Second surface; 15. Flow channel; 2. Diaphragm heater; 21. Substrate; 22. Conductor layer; 221. Connecting wire; 222. Interface; 23. Resistance layer; 24. Metal plate; 3. Main nozzle; 4. Hot nozzle; 5. Tubular heater; 6. Power wire. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Terms such as "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used herein to indicate spatial relative positions are used for the purpose of convenience to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. Terms of spatial relative positions may be intended to include different orientations of the device in use or operation other than the orientation shown in the drawings.

[0024] For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0025] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] Furthermore, it should be understood that although the terms first, second, etc. may be used herein to describe various elements or structures, these described objects should not be limited by these terms. These terms are only used to distinguish these described objects from each other. For example, a first insulating layer may be referred to as a second insulating layer, and similarly, a second insulating layer may also be referred to as a first insulating layer, without departing from the scope of protection of this application.

[0027] The utility model embodiment provides a hot runner system, such as Figure 1-4 As shown, it includes a diverter plate 1 and a diaphragm heater 2, the diverter plate 1 has a first surface 13 and a second surface 14 relative to each other, and a plurality of flow channels 15 penetrating the first surface 13 and the second surface 14, the diaphragm heater 2 is attached to the first surface 13 and / or the second surface 14 of the diverter plate 1, and includes a substrate 21, a first insulating layer arranged on the substrate 21, a conductor layer 22 and a resistor layer 23 arranged on the first insulating layer, and a second insulating layer arranged on the conductor layer 22 and the resistor layer 23; the attachment area of ​​the diaphragm heater 2 is not less than 50% of the first surface 13 and / or the second surface 14.

[0028] The manifold 1 in the utility model realizes heating by attaching a diaphragm heater 2 on its first surface 13 and / or second surface 14, without processing a heating wire groove on the surface of the manifold 1, thereby reducing the processing cost of the manifold 1 and avoiding the inconvenience of assembling the heater and the inconvenience of subsequent maintenance.

[0029] Preferably, the substrate 21 is a metal layer, the first insulating layer is a ceramic layer, and the second insulating layer is a glass layer.

[0030] like Figure 1 In the figure, the diaphragm heater 2 is fixed on a metal plate 24 by ceramic sintering or the like, and the four corners of the metal plate 24 are fixed on the diverter plate 1 by screws or the like. The metal plate 24 has good thermal conductivity, and the diaphragm heater 2 is fixed on the diverter plate 1 by the metal plate 24, which is convenient for the later maintenance or replacement of the diaphragm heater 2.

[0031] Furthermore, the hot runner system also includes a main nozzle 3 and a hot nozzle 4; the diverter plate 1 is in an I-shape, and the I-shaped diverter plate 1 includes two horizontal diverter portions 11 and an incident portion 12 connecting the two diverter portions 11, the main nozzle 3 is connected to the first surface 13 of the incident portion 12, and the hot nozzle 4 is connected to the second surface 14 of the diverter portion 11.

[0032] Two horizontally arranged flow diverters 11 are arranged in parallel, the incident part 12 is arranged perpendicular to the two flow diverters 11, one main nozzle 3 is arranged and arranged in the middle of the incident part 12, and four hot nozzles 4 are arranged, wherein two hot nozzles 4 are arranged at intervals in each flow diverter 11. The main nozzle 3 and the hot nozzle 4 are both connected to the flow channel 15, and the fluid enters the flow channel 15 of the flow diverter plate 1 through the main nozzle 3, and then flows out through the hot nozzle 4. Of course, the number of hot nozzles 4 is not limited to four, and the number of hot nozzles 4 can be set as needed. Of course, the shape of the flow diverter plate is not limited to the I-shaped shape, and can be designed into other shapes as needed.

[0033] Furthermore, the diaphragm heaters 2 are arranged at intervals along the length direction of the transversely arranged diverter portion 11 .

[0034] The second surface 14 of the flow dividing portion 11 is connected to the hot nozzle 4, and the diaphragm heater 2 needs to give way to the hot nozzle 4; the hot nozzle 4 needs to control the flow rate through the valve needle, and the valve needle needs to be driven by a driving mechanism, and the driving mechanism (not shown) is arranged on the first surface 13 side of the flow dividing plate 1, so the diaphragm heater 2 arranged on the first surface 13 of the flow dividing portion 11 needs to give way to the driving mechanism. Figure 1 In the embodiment, a smaller diaphragm heater 2 may be arranged in the blank portion between the two diaphragm heaters 2 to maximize the heating area.

[0035] Further, such as Figure 4 As shown, the conductor layer 22 includes a connecting wire 221 and an interface 222 . The connecting wire 221 is connected to the resistance layer 23 . The interface 222 is used to connect to an external power source. The interface 222 is arranged near the end of the shunt portion 11 away from the incident portion 12 .

[0036] The interface 222 is connected to the power supply wire 6 of the external power supply, and the connecting wire 221 is connected to the resistance layer 23 to provide power to the resistance layer 23. The resistance layer 23 generates heat after being energized, and converts the electrical energy into thermal energy to heat the shunt plate 1. The interface 222 is close to the end of the shunt portion 11 away from the incident portion 12, that is, the interface 222 is arranged outside the shunt portion 11, so that when the interface 222 is connected to the external power supply, the external power supply will not be squeezed between the two shunt portions 11, causing the external power supply to be messy, and the temperature between the shunt portions 11 is high, which is easy to cause the wires of the external power supply to age faster.

[0037] In some embodiments, the hot runner system also includes a tubular heater 5 mounted on the hot nozzle 4 and / or the main nozzle 3, and the tubular heater 5 also includes a substrate 21, a first insulating layer arranged on the substrate 21, a conductor layer 22 and a resistor layer 23 arranged on the first insulating layer, and a second insulating layer arranged on the conductor layer 22 and the resistor layer 23.

[0038] In the hot runner system, in addition to the manifold 1, the main nozzle 3 and the hot nozzle 4 also need to be heated to ensure the temperature of the fluid in the flow channel 15. The basic structure of the tubular heater 5 is the same as that of the diaphragm heater 2. The difference between the two is that the diaphragm heater 2 is sheet-shaped, while the tubular heater 5 is cylindrical and can be mounted on the cylindrical main nozzle 3 and the hot nozzle 4.

[0039] Like the diaphragm heater 2 , the tubular heater 5 can be fixed on a cylindrical metal tube by ceramic sintering or the like, and then the metal tube is sleeved on the main nozzle 3 and / or the hot nozzle 4 .

[0040] Furthermore, the resistance layer 23 is composed of resistance wires, and the resistance wires are evenly distributed or unevenly distributed on the first insulating layer.

[0041] After being energized, the resistance wire generates heat to heat the manifold 1, the main nozzle 3 or the hot nozzle 4. According to the different heat requirements of the manifold 1, the main nozzle 3 and the hot nozzle 4, the distribution of the resistance wire on the first insulating layer is different.

[0042] Preferably, the resistance wires in the diaphragm heater 2 are evenly distributed. Since the diaphragm heater 2 is attached to the manifold 1 and the manifold 1 requires even heat, the resistance wires are evenly distributed.

[0043] Preferably, the resistance wires in the tubular heater 5 are unevenly distributed. More preferably, the resistance wires at the end of the tubular heater 5 away from the manifold 1 are more densely distributed than at the end close to the manifold 1. The temperature of the fluid in the flow channel 15 of the manifold 1 needs to be uniform, and the temperature difference needs to be as small as possible, so the resistance wires in the diaphragm heater 2 attached to the first surface 13 and the second surface 14 of the manifold 1 need to be evenly distributed. One end of the hot nozzle 4 is connected to the manifold 1, and the end of the hot nozzle 1 connected to the manifold 1 has heat transfer or supplement from the manifold 1, so the resistance wires at the end of the tubular heater 5 close to the manifold 1 are less densely distributed. The end of the hot nozzle 4 away from the manifold 1 is in contact with or connected to the mold. Since the mold temperature is lower than the temperature of the hot nozzle 4, the temperature of the end of the hot nozzle 4 away from the manifold 1 will be transferred to the mold, resulting in a lower temperature at the end of the hot nozzle 4 away from the manifold 1. In order to make the fluid temperature in the hot nozzle 4 as uniform as possible and the temperature difference as small as possible, and to compensate for the heat loss at the end of the hot nozzle 4 away from the diverter plate 1, it is necessary to have a higher heating temperature requirement for the end of the hot nozzle 4 away from the diverter plate 1. Therefore, the resistance wires of the tubular heater 5 mounted on the hot nozzle 4 are distributed more densely at the end away from the diverter plate 1.

[0044] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0045] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A hot runner system, characterized in that: It includes a diverter plate and a diaphragm heater, the diverter plate has a first surface and a second surface relative to each other, and a plurality of flow channels penetrating the first surface and the second surface, the diaphragm heater is attached to the first surface and / or the second surface of the diverter plate, and includes a substrate, a first insulating layer arranged on the substrate, a conductor layer and a resistor layer arranged on the first insulating layer, and a second insulating layer arranged on the conductor layer and the resistor layer; the attachment area of ​​the diaphragm heater is not less than 50% of the first surface and / or the second surface.

2. The hot runner system according to claim 1, characterized in that: It also includes the main nozzle and hot nozzle; The diverter plate is in an I-shape, and includes two transverse diverter portions and an incident portion connecting the two diverter portions. The main nozzle is connected to a first surface of the incident portion, and the hot nozzle is connected to a second surface of the diverter portion.

3. The hot runner system according to claim 2, characterized in that: The diaphragm heaters are arranged at intervals along the length direction of the transversely arranged diverter portion.

4. The hot runner system according to claim 3, characterized in that: The conductor layer includes a connecting wire and an interface, wherein the connecting wire is connected to the resistance layer, and the interface is used to connect to an external power source, and the interface is arranged close to one end of the shunt portion away from the incident portion.

5. The hot runner system according to claim 2, characterized in that: It also includes a tubular heater sleeved on the hot nozzle and / or the main nozzle, and the tubular heater also includes a substrate, a first insulating layer arranged on the substrate, a conductor layer and a resistor layer arranged on the first insulating layer, and a second insulating layer arranged on the conductor layer and the resistor layer.

6. The hot runner system according to claim 5, characterized in that: The resistance layer is composed of resistance wires, and the resistance wires are evenly distributed or unevenly distributed on the first insulating layer.

7. The hot runner system according to claim 6, characterized in that: The resistance wires in the diaphragm heater are evenly distributed.

8. The hot runner system according to claim 6, characterized in that: The resistance wires in the tubular heater are not evenly distributed.

9. The hot runner system according to claim 8, characterized in that: The resistance wires of the tubular heater at one end away from the diverter plate are more densely distributed than at one end close to the diverter plate.

10. The hot runner system according to claim 1, characterized in that: The substrate is a metal layer, the first insulating layer is a ceramic layer, and the second insulating layer is a glass layer.

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