A material injection structure of a fan blade injection mold

Abstract

The utility model relates to the field of fan blade injection moulding, especially a material injection structure of fan blade injection mould, including fixed mould backing plate, elastic material board and forming plate, fixed mould backing plate, elastic material board and forming plate are in turn laminated, fixed mould backing plate is detachably connected with elastic material board, elastic material board is detachably connected with forming plate, the inside of forming plate is equipped with injection space, the top of forming plate is equipped with main runner groove, still include improved edition sprue bush, improved edition sprue bush is equipped with the connecting groove for accommodating injection head, connecting groove and main runner groove intercommunication, improved edition sprue bush is from the middle part of elastic material board and penetrates elastic material board, improved edition sprue bush is from the middle part of fixed mould backing plate and penetrates fixed mould backing plate, improved edition sprue bush is detachably connected with fixed mould backing plate, through optimizing runner to reduce injection material head, shorten the distance of opening mould, reduce product production cycle, reduce material recovery cost, improve economic benefit, avoid injection material waste.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine blade injection molding, and in particular to an injection structure for a wind turbine blade injection mold. Background Technology

[0002] Cross-flow, axial, or centrifugal fan blades all require multi-layer molds for injection molding. These multiple molds, connected together, form the injection space for the blade. The blade is formed by filling this space with molding material. For example... Figure 1 The injection structure of an injection mold shown includes a fixed mold base plate 1, a spring plate 2, and a molding plate 3 stacked in sequence. The molding plate 3 is provided with a main runner and a gating space. A sprue sleeve 4 is embedded in the fixed mold base plate 1. The top of the sprue sleeve 4 is the injection port. The sprue sleeve 4 connects the injection port and the main runner through its own slender tubular features. A positioning ring for positioning the injection nozzle is also provided on the top of the fixed mold base plate 1. When injection molding the fan blade, the injection nozzle is positioned by the positioning ring, and the injection material is filled into the injection space 5 through the injection port on the top, the sprue sleeve 4, and the main runner.

[0003] However, during use, it was found that the injection material enters the injection space sequentially through the injection port, sprue bushing, and main runner, resulting in a long flow path. After injection, the excessively long injection head causes waste of injection material, increases the mold opening distance, and consequently shortens the molding cycle and reduces production efficiency. Utility Model Content The purpose of this invention is to overcome the shortcomings of the existing technology, such as the long flow path of the injection material in the current injection mold and the excessively long injection head, which leads to waste of injection material, and to provide an injection structure for a fan blade injection mold.

[0004] This utility model provides an injection structure for a fan blade injection mold, including a fixed mold base plate, a spring plate, and a molding plate stacked sequentially. The molding plate has an injection space and a main runner groove on its top. It also includes a modified sprue sleeve that penetrates the fixed mold base plate, the spring plate, and the fixed mold base plate. The modified sprue sleeve is detachably connected to the fixed mold base plate and has a connecting groove that communicates with the main runner groove. The connecting groove can accommodate an injection nozzle.

[0005] Preferably, the improved gate sleeve is funnel-shaped, and the bottom of the funnel-shaped sleeve has an injection hole that is connected to the main runner.

[0006] Preferably, the length of the injection hole is less than 0.6 cm.

[0007] Preferably, the connecting groove includes a columnar section and a conical section, the columnar section and the conical section are connected, and the injection hole is connected to the conical section.

[0008] Preferably, the bottom of the conical segment is constructed as an arc-shaped surface.

[0009] Preferably, the connecting groove is provided with a sealing step for sealing, the sealing step is located between the columnar section and the conical section, and the sealing step can abut against the injection nozzle.

[0010] Preferably, the improved sprue sleeve is provided with a connecting ring, which is sleeved on the outside of the improved sprue sleeve and is detachably connected to the fixed mold plate.

[0011] Preferably, the connecting ring is provided with a connecting bolt, which is threadedly connected to the fixed mold plate.

[0012] Preferably, the connecting ring and the improved gate sleeve are integrally formed structural components.

[0013] Preferably, the mold plate has a groove that matches the connecting ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides an injection structure for a fan blade injection mold. By removing the sprue sleeve located at the spring plate and passing an improved sprue sleeve through the spring plate, the main runner groove is connected to the connecting groove of the injection nozzle. When the injection nozzle injects injection material into the injection space of the mold, the injection nozzle inserts into the connecting groove, thereby avoiding an excessively long injection head and shortening the flow channel length from the injection nozzle to the injection space, thus reducing the amount of injection material used. By optimizing the flow channel to shorten the sprue length, the mold opening distance is shortened, the product production cycle is reduced, the material recycling cost is reduced, economic efficiency is improved, and waste of injection material is avoided. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural diagram of an injection molding structure in the background art; Figure 2 This is a cross-sectional view of the injection structure of a fan blade injection mold according to the present invention. Figure 3 This is a schematic diagram of the improved sprue sleeve of the injection structure of a fan blade injection mold according to this utility model; Figure 4 This is a schematic diagram of the main channel of the injection structure of a fan blade injection mold according to the present invention; Figure 5 A schematic diagram of the injection structure of a fan blade injection mold using this utility model; Figure 6 This is a schematic diagram of the mold in use, showing the injection structure of a fan blade injection mold according to Example 1. Figure 7 This is a schematic diagram of the improved sprue sleeve structure of a fan blade injection mold according to Example 2.

[0016] Marked in the image: 1-Fixed mold base plate, 2-Spring plate, 3-Molding plate, 4-Gate bushing, 5-Injection space, 6-Improved gate bushing, 61-Connecting ring, 7-Connecting groove, 71-Columnar section, 72-Conical section, 8-Main runner groove, 9-Circular transition, 10-Injection hole, 11-Filling channel, 12-Groove, 13-Sealing step. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0018] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0019] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0020] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0021] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0022] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0023] Example 1 like Figures 2-6 As shown, the injection structure of a fan blade injection mold is specifically composed of a fixed mold base plate 1, a spring plate 2, a modified sprue bushing 6, and a molding plate 3. The fixed mold base plate 1, the spring plate 2, and the molding plate 3 are stacked sequentially. The fixed mold base plate 1 and the spring plate 2 are detachably connected, and the spring plate 2 and the molding plate 3 are detachably connected. The molding plate 3 has an injection space 5 inside, and a main runner groove 8 is provided on the top of the molding plate 3. The modified sprue bushing 6 has a connecting groove 7 for accommodating the injection nozzle. The connecting groove 7 communicates with the main runner groove 8. The modified sprue bushing 6 passes through the spring plate 2 from the middle and passes through the fixed mold base plate 1 from the middle. The modified sprue bushing 6 and the fixed mold base plate 1 are detachably connected.

[0024] By removing the sprue sleeve 4 located at the spring plate 2 and passing the improved sprue sleeve 6 through the spring plate 2, the main runner 8 is connected to the connecting groove 7 of the injection nozzle. When the injection nozzle injects the injection material into the injection space 5 of the mold, the injection nozzle inserts into the connecting groove 7, thereby avoiding excessively long injection nozzles, reducing the amount of injection material used, and shortening the runner length from the injection nozzle to the injection space 5. By optimizing the runner, the waste of injection material caused by excessively long injection nozzles is reduced, the mold opening distance is shortened, the product production cycle is reduced, the material recycling cost is reduced, the economic efficiency is improved, and the waste of injection material is avoided.

[0025] Specifically, after the fixed mold base plate 1, the spring plate 2, and the molding plate 3 are stacked in sequence, multiple bolts are passed through the fixed mold base plate 1, the spring plate 2, and the molding plate 3 in sequence to tighten the fixed mold base plate 1, the spring plate 2, and the molding plate 3, so that the fixed mold base plate 1, the spring plate 2, and the molding plate 3 are tightly connected. Multiple bolts are distributed around the circumference of the improved sprue bushing 6 to ensure the tension strength. The upper part of the main runner 8 is covered by the spring plate 2 to form the main runner. There are five main runners 8 on the top of the molding plate 3, which are arranged in a radiating pattern with the position where the injection material is discharged from the improved sprue bushing 6 as the center.

[0026] In one or more embodiments, the improved sprue sleeve 6 is constructed in the shape of a funnel, with an injection hole 10 at the bottom of the funnel. The injection hole 10 is connected to the main runner groove 8. After the injection nozzle is placed into the connecting groove 7, the discharge port of the injection nozzle is aligned with the injection hole 10, so that the injection material discharged from the injection nozzle enters the main runner through the injection hole 10, avoiding waste of injection material caused by an excessively long injection head.

[0027] In an optional embodiment, the channel length of the injection hole 10 is less than 0.6 cm. By shortening the length of the injection hole 10, the excessive length of the injection head is avoided, which would cause waste of injection material. Generally, when designing the channel length of the injection hole 10, the overall structural strength of the modified sprue sleeve 6 should also be considered to prevent the modified sprue sleeve 6 from breaking under pressure. Therefore, the channel length of the injection hole 10 should be greater than 0.5 cm. The modified sprue sleeve 6 is a stainless steel component.

[0028] In an optional embodiment, the connecting groove 7 includes a columnar section 71 and a conical section 72, which are connected. The injection hole 10 is connected to the conical section 72, and the columnar section 71 is located above the conical section 72. Specifically, the maximum diameter of the conical section 72 is equal to the diameter of the columnar section 71, and the columnar section 71 and the conical section 72 are coaxially arranged so that the connection between the columnar section 71 and the conical section 72 is aligned, thereby ensuring that the injection nozzle can fit tightly with the connecting groove 7. The larger opening of the columnar section 71 allows the injection nozzle to be positioned quickly, and the gradually changing diameter of the conical section 72 can guide the injection nozzle, thereby ensuring that the discharge port of the injection nozzle is aligned and connected with the injection hole 10. The bottom of the conical section 72 is arc-shaped so that the bottom of the conical section 72 fits with the injection nozzle, preventing the injection material from leaking into the connecting groove 7.

[0029] In an optional embodiment, the connecting groove 7 is provided with an arc transition 9, which is located at the connection between the columnar segment 71 and the conical segment 72.

[0030] In one or more embodiments, the improved sprue sleeve 6 is provided with a connecting ring 61. The connecting ring 61 is sleeved on the outside of the improved sprue sleeve 6 and is detachably connected to the fixed mold pad 1. Specifically, the connecting ring 61 makes the improved sprue sleeve 6 firmly fixed on the fixed mold pad 1, which facilitates the positioning of the injection nozzle. By setting the connecting ring 61, interference with the injection nozzle is avoided.

[0031] In an optional embodiment, the connecting ring 61 is provided with a connecting bolt, which is threadedly connected to the fixed mold pad 1; bolt holes are provided on opposite sides of the connecting ring 61, and the connecting bolt is installed in the bolt hole to make the connecting bolt threadedly connected to the fixed mold pad 1, which facilitates the installation and disassembly of the improved sprue sleeve 6, and facilitates mold disassembly and mold closure.

[0032] In an optional embodiment, the connecting ring 61 and the improved sprue sleeve 6 are integrally formed structural components, thereby ensuring the connection strength between the connecting ring 61 and the improved sprue sleeve 6.

[0033] In an optional embodiment, the mold plate 1 is provided with a groove 12 that is adapted to the connecting ring 61.

[0034] In one or more embodiments, the molding plate 3 is provided with a filler channel 11, one end of which is connected to the main runner 8 and the other end is connected to the injection space 5. The filler channel 11 is used to guide the injection material from the main runner 8 to the injection space 5.

[0035] In an optional embodiment, the filler channel 11 is arranged vertically, the main channel groove 8 is arranged horizontally, the filler channel 11 is perpendicular to the main channel groove 8, and the end of the filler channel 11 is connected to the end of the main channel groove 8. By making the filler channel 11 perpendicular to the main channel groove 8, the five main channels arranged in a divergent manner can be filled with injection molding material evenly into the columnar space through the filler channel 11.

[0036] The present invention relates to an injection structure for a fan blade injection mold, which shortens the flow channel length during fan blade injection and avoids waste of injection material caused by an excessively long injection head.

[0037] Example 2 like Figure 7 The injection structure of the fan blade injection mold shown is roughly the same as that of Embodiment 1. The difference is that the connecting groove 7 is provided with a sealing step 13 for sealing. The sealing step 13 is located between the columnar section 71 and the conical section 72. The sealing step 13 can abut against the injection nozzle. The funnel-shaped structure is adapted to the shape of the injection nozzle. After the injection nozzle is fitted into the connecting groove 7, it can ensure a good seal between the injection nozzle and the improved sprue sleeve 6. The sealing step 13 can limit the injection nozzle and prevent the end of the injection nozzle from damaging the injection hole 10.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An injection structure for a fan blade injection mold, comprising a fixed mold base plate (1), a spring plate (2), and a molding plate (3) stacked sequentially, wherein the molding plate (3) has an injection space (5) and a main runner groove (8) is provided on the top of the molding plate (3), characterized in that, It also includes an improved sprue bushing (6), which penetrates the fixed mold base plate (1), the spring plate (2) and the fixed mold base plate (1). The improved sprue bushing (6) is detachably connected to the fixed mold base plate (1). The improved sprue bushing (6) is provided with a connecting groove (7), which is connected to the main runner groove (8). The connecting groove (7) can accommodate the injection nozzle.

2. The injection structure of a fan blade injection mold according to claim 1, characterized in that, The improved sprue sleeve (6) is funnel-shaped, and the bottom of the funnel-shaped sleeve is provided with a sprue hole (10), which is connected to the main channel groove (8).

3. The injection structure of a fan blade injection mold according to claim 2, characterized in that, The length of the injection hole (10) is less than 0.6 cm.

4. The injection structure of a fan blade injection mold according to claim 2, characterized in that, The connecting groove (7) includes a columnar section (71) and a conical section (72), the columnar section (71) and the conical section (72) are connected, and the injection hole (10) is connected to the conical section (72).

5. The injection structure of a fan blade injection mold according to claim 4, characterized in that, The bottom of the conical segment (72) is constructed as an arc-shaped surface.

6. The injection structure of a fan blade injection mold according to claim 4, characterized in that, The connecting groove (7) is provided with a sealing step (13) for sealing. The sealing step (13) is located between the columnar section (71) and the conical section (72). The sealing step (13) can abut against the injection nozzle.

7. The injection structure of a fan blade injection mold according to claim 1, characterized in that, The improved sprue sleeve (6) is provided with a connecting ring (61), which is sleeved on the outside of the improved sprue sleeve (6) and is detachably connected to the fixed mold plate (1).

8. The injection structure of a fan blade injection mold according to claim 7, characterized in that, The connecting ring (61) is provided with a connecting bolt, which is threadedly connected to the fixed mold plate (1).

9. The injection structure of a fan blade injection mold according to claim 7, characterized in that, The connecting ring (61) and the improved sprue sleeve (6) are integrally formed structural components.

10. The injection structure of a fan blade injection mold according to claim 7, characterized in that, The fixed mold plate (1) is provided with a groove (12) that is adapted to the connecting ring (61).

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