A core structure and molding die for an axial flow fan blade
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-17
- Publication Date
- 2026-08-14
AI Technical Summary
[0004]本实用新型的目的在于克服现有技术中所存在的动模轴芯位于成型平面一侧的端面面积较小，导致封胶位较窄的不足，提供一种轴流风叶的模芯结构及成型模具
1.本实用新型提供一种轴流风叶的模芯结构，通过在动模模芯的定位凹槽内设置抵接块，抵接块增大了第一端面和第二端面的接触面积，从而增大了模芯结构封胶位，避免漏胶到垫片孔内；为适应抵接块使用，在定位柱环周排列设置定位凸棱以适应抵接块使用，使动模模芯和定模模芯对接定位，通过将抵接块设置在相邻两块定位凸棱之间，避免抵接块与定模的定位结构干涉；通过抵接平面与第二端面平齐，在动模模芯与定模模芯对接时，抵接平面与第一端面抵接，增加了位于靠近成型平面一侧的封胶位最小宽度，从而避免因模具合模误差导致的漏胶，降低了模具返修率，提高了轴流风叶的成型质量；具有良好的经济价值和实用价值。
Smart Images
Figure CN224631191U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of axial flow fan blade injection molding, and in particular to a core structure and molding die for an axial flow fan blade. Background Technology
[0002] The axial fan blade has a shaft hole in the center for connecting to the motor of the outdoor unit of the air conditioner; for example... Figures 1-4 As shown, this shaft hole consists of a metal gasket 100 with a central circular hole and a molding hole in the plastic portion surrounding the metal gasket 100. The molding hole is a flat shaft hole coaxial with the circular hole of the gasket 100. The flat shaft hole is injection molded by the interaction of a moving mold core 102 on the moving mold and a fixed mold positioning core 101 on the fixed mold. The moving mold core 102 is slightly larger than the circular hole of the gasket 100. During mold closing, the fixed mold positioning core 101 passes through the circular hole of the gasket 100 and engages with the central circular hole of the moving mold core 102, causing the end face of the fixed mold positioning core 101 to abut and seal with the end face of the moving mold core 102, forming a sealing position. Figures 1-2 As shown, a positioning cylinder is provided at the end of the fixed mold positioning core 101, and a cylindrical positioning groove is provided at the end of the moving mold shaft core 102. The positioning groove and the positioning cylinder are adapted to each other, so that the fixed mold positioning core 101 and the moving mold shaft core 102 can be accurately docked.
[0003] However, due to the need for forming the flat shaft hole, a forming plane needs to be set on the side of the moving mold core 102. This makes the end face area of the moving mold core 102 on the side of the forming plane smaller than that of other positions. The sealing position of the end face of the moving mold core 102 on the side of the forming plane is narrower. During mold closing and injection molding, it is easy to cause glue leakage into the hole of the gasket 100, which increases the amount of rework of the axial flow fan blade, reduces production efficiency, and in severe cases, may even lead to product scrap and mold damage. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the existing technology, where the end face area of the moving mold core located on one side of the molding plane is small, resulting in a narrow sealing position, and to provide a mold core structure and molding die for an axial flow fan blade.
[0005] In a first aspect, this utility model provides a core structure for an axial flow fan blade, comprising: A fixed mold core, wherein the fixed mold core is provided with a first end face, the first end face is provided with positioning posts, and the positioning posts are provided with a plurality of positioning protrusions arranged around their circumference; The moving mold core has a second end face and a forming plane for forming a flat shaft hole. The forming plane is located on the side wall of the moving mold core. The second end face has a positioning groove, and an abutment block is provided in the positioning groove. The abutment block is located on the side of the positioning groove closer to the forming plane and is connected to the moving mold core. The abutment block has an abutment plane, which is flush with the second end face. After the mold is closed, the first end face abuts against the second end face, the positioning post is inserted into the positioning groove, the positioning protrusion abuts against the side wall of the positioning groove, and the abutting plane abuts against the first end face.
[0006] Preferably, the abutting block is an arc-shaped block, and the end of the arc-shaped block abuts against the positioning protrusion.
[0007] Preferably, one end of the arc-shaped block abuts against the positioning protrusion, and the other end abuts against another positioning protrusion.
[0008] Preferably, the abutting block and the moving mold core are integrally formed structural components, and the positioning post and the fixed mold core are integrally formed structural components.
[0009] Preferably, the bottom of the positioning groove has a limiting groove, the abutting block is located in the limiting groove, and the abutting plane is flush with the bottom of the groove; the first end face has a boss, the shape of the boss is adapted to the shape of the positioning groove, the positioning post is connected to the boss, the positioning protrusion can abut against the side wall of the limiting groove, the boss can abut against the bottom of the groove, and the boss can abut against the abutting plane.
[0010] Preferably, the positioning groove is a frustum-shaped groove.
[0011] Preferably, the three positioning protrusions are arranged circumferentially around the positioning post.
[0012] Preferably, both the fixed mold core and the moving mold core are steel structural components.
[0013] In a second aspect, this utility model provides a molding die for an axial flow fan blade, including a fixed die, a moving die, and the aforementioned mold core structure for an axial flow fan blade. The fixed die core is connected to the fixed die, and the moving die core is connected to the moving die. The fixed die is provided with a first molding groove, and the moving die is provided with a second molding groove. The first molding groove and the second molding groove engage to form a molding space. The fixed die core is located in the first molding groove, and the moving die core is located in the second molding groove.
[0014] Preferably, the fixed mold core is detachably connected to the fixed mold, and the moving mold core is detachably connected to the moving mold.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a mold core structure for an axial flow fan blade. By setting an abutment block in the positioning groove of the moving mold core, the contact area of the first and second end faces is increased, thereby increasing the sealing area of the mold core structure and preventing glue leakage into the gasket hole. To accommodate the use of the abutment block, positioning protrusions are arranged around the positioning post to accommodate the use of the abutment block, so that the moving mold core and the fixed mold core are docked and positioned. By placing the abutment block between two adjacent positioning protrusions, interference between the abutment block and the positioning structure of the fixed mold is avoided. By making the abutment plane flush with the second end face, when the moving mold core and the fixed mold core are docked, the abutment plane abuts with the first end face, increasing the minimum width of the sealing area located on the side near the forming plane, thereby avoiding glue leakage caused by mold closing errors, reducing the mold rework rate, and improving the forming quality of the axial flow fan blade. It has good economic and practical value.
[0016] 2. This utility model provides a molding die for an axial flow fan blade. By adopting a mold core structure for the axial flow fan blade, the sealing position after mold closing is increased; the probability of glue leakage is reduced, the mold closing efficiency is improved, the mold rework rate is reduced, and the molding quality of the axial flow fan blade is improved. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the docking structure between the fixed mold positioning core and the moving mold shaft core in the prior art; Figure 2 This is a schematic diagram of the structure of the fixed mold positioning core in the prior art; Figure 3 This is a schematic diagram of the structure of the moving mold shaft core in the prior art; Figure 4 This is a schematic diagram showing the minimum width of the sealing area of the moving mold core in the prior art; Figure 5 This is a schematic diagram of the docking structure between the fixed mold core and the moving mold core of a mold core structure for an axial flow fan blade according to this utility model; Figure 6 This is a schematic diagram of the fixed mold core of the mold core structure of an axial flow fan blade according to the present invention; Figure 7 This is a schematic diagram of the moving mold core of an axial flow fan blade according to the present invention; Figure 8 This is a schematic diagram showing the minimum width of the sealing area of the moving mold core of an axial flow fan blade according to the present invention. Figure 9 This is a schematic diagram of the fixed mold core of an axial flow fan blade according to Embodiment 1 of this utility model; Figure 10This is a schematic diagram of the moving mold core of an axial flow fan blade according to Embodiment 1 of this utility model; Figure 11 This is a schematic diagram of the magnetic suction component of a molding die for an axial flow fan blade, according to Embodiment 2 of this utility model.
[0018] Marked in the image: 1-Fixed mold core, 11-First end face, 12-Boss, 13-Locking pin, 14-Locking protrusion, 2-Moving mold core, 21-Second end face, 22-Forming plane, 23-Abutting block, 24-Locking groove, 25-Limiting groove, 3-Magnetic suction component 100 - Gasket, 101 - Fixed mold positioning core, 102 - Moving mold shaft core d - Minimum width of the sealing area. Detailed Implementation
[0019] 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.
[0020] 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.
[0021] 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.
[0022] 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.
[0023] 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.
[0024] 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.
[0025] Example 1 like Figures 5-10As shown, a core structure for an axial flow fan blade comprises a fixed mold core 1 and a moving mold core 2. The fixed mold core 1 has a first end face 11 at its end, with positioning posts 13 arranged around its circumference. The moving mold core 2 has a second end face 21 and a forming plane 22 for forming a flat shaft hole at its end. The forming plane 22 is located on the side wall of the moving mold core 2. The second end face 21 has a positioning groove 24, and an abutment block 23 is located within the positioning groove 24 near the forming plane 22. On one side, the abutment block 23 is connected to the moving mold core 2; the abutment block 23 is provided with an abutment plane, which is flush with the second end face 21; after the mold is closed, the first end face 11 abuts with the second end face 21, the positioning pin 13 is inserted into the positioning groove 24, and the positioning protrusion 14 abuts with the side wall of the positioning groove 24, so that the fixed mold core 1 and the moving mold core 2 are coaxially arranged, and the abutment plane abuts with the first end face 11; specifically, the fixed mold core 1 and the moving mold core 2 are both cylindrical parts, the first end face 11 is located at the end of the fixed mold core 1, and the second end face 21 is located at the end of the moving mold core 2.
[0026] By setting an abutment block 23 in the positioning groove 24 of the moving mold core 2, the contact area of the first end face 11 and the second end face 21 is increased, thereby increasing the sealing position of the mold core structure and preventing glue leakage into the hole of the gasket 100. To accommodate the use of the abutment block 23, positioning protrusions 14 are arranged around the positioning post 13 to accommodate the use of the abutment block 23, so that the moving mold core 2 and the fixed mold core 1 are docked and positioned. By setting the abutment block 23 between two adjacent positioning protrusions 14, interference between the abutment block 23 and the positioning structure of the fixed mold is avoided. By making the abutment plane flush with the second end face 21, when the moving mold core 2 and the fixed mold core 1 are docked, the abutment plane abuts with the first end face 11, increasing the minimum width d of the sealing position located on the side near the forming plane 22, thereby avoiding glue leakage caused by mold closing error, reducing the mold rework rate, and improving the forming quality of the axial flow fan blade.
[0027] In one or more embodiments, the abutment block 23 is an arc-shaped block, the end of which abuts against the positioning protrusion 14. The arc-shaped block increases the sealing position after the moving mold core 2 and the fixed mold core 1 are connected, thereby increasing the minimum width d of the sealing position on the abutment plane side, thus preventing glue leakage from the sealing position on the abutment plane side. Specifically, in existing axial flow fan blade injection molds, the minimum width d of the sealing position on the abutment plane side is 0.04mm. During injection molding, even a slight positional shift during mold closing can lead to glue leakage. In this application, the abutment block 23 increases the minimum width d of the sealing position on the abutment plane side to 1.04mm, thereby preventing glue leakage during axial flow fan blade injection molding. The arc-shaped block abuts against the side wall of the positioning protrusion 14, forming a guide structure that guides the moving mold core 2 and the fixed mold core 1 to achieve precise docking.
[0028] In an optional embodiment, one end of the arc-shaped block abuts against the positioning protrusion 14, and the other end abuts against another positioning protrusion 14. By having both ends of the arc-shaped block abut against the sidewalls of the positioning protrusion 14 respectively, the positioning accuracy of the moving mold core 2 and the fixed mold core 1 is enhanced.
[0029] In one or more embodiments, the abutment block 23 and the moving mold core 2 are integrally formed structural components, and the positioning post 13 and the fixed mold core 1 are integrally formed structural components to ensure structural strength.
[0030] In one or more embodiments, a limiting groove 25 is provided at the bottom of the positioning groove 24, and the abutting block 23 is located in the limiting groove 25 with the abutting plane flush with the bottom of the groove; a boss 12 is provided on the first end face 11, the shape of the boss 12 is adapted to the shape of the positioning groove 24, the positioning post 13 is connected to the boss 12, the positioning protrusion 14 can abut against the side wall of the limiting groove 25, the boss 12 can abut against the bottom of the groove, and the boss 12 can abut against the abutting plane.
[0031] In one or more embodiments, the positioning groove 24 is a frustum-shaped groove with inclined sidewalls, which can guide the moving mold core 2 and the fixed mold core 1 to dock. Specifically, the sidewall of the positioning protrusion 14 is provided with an inclined surface that matches the sidewall of the frustum-shaped groove. After the moving mold core 2 and the fixed mold core 1 dock, the inclined surface abuts against the sidewall of the frustum-shaped groove. By having multiple positioning protrusions 14 abut against the frustum-shaped groove in different positions, the moving mold core 2 and the fixed mold core 1 can be accurately docked.
[0032] In one or more embodiments, three positioning protrusions 14 are arranged around the circumference of the positioning post 13, and the included angle between two adjacent positioning protrusions 14 is 120°. After the fixed mold core 1 and the moving mold core 2 are docked, the abutment block 23 is located between two adjacent positioning protrusions 14.
[0033] In one or more embodiments, both the fixed mold core 1 and the moving mold core 2 are steel structural components, which can be made of model steel.
[0034] Example 2 A molding die for an axial flow fan blade is specifically composed of a fixed die, a moving die, and a core structure for an axial flow fan blade as described in Example 1. The fixed die core 1 is connected to the fixed die, and the moving die core 2 is connected to the moving die. The fixed die is provided with a first molding groove, and the moving die is provided with a second molding groove. The first molding groove and the second molding groove are engaged to form a molding space. The fixed die core 1 is located in the first molding groove, and the moving die core 2 is located in the second molding groove.
[0035] By adopting a mold core structure for axial flow fan blades, the sealing area after mold closing is increased; the probability of glue leakage is reduced, the mold closing efficiency is improved, the mold rework rate is reduced, and the molding quality of axial flow fan blades is improved.
[0036] In one or more embodiments, the fixed mold core 1 is detachably connected to the fixed mold, and the moving mold core 2 is detachably connected to the moving mold, which facilitates the maintenance of the fixed mold core 1 and the moving mold core 2; in some embodiments, the fixed mold core 1 and the fixed mold are integrally formed steel structural components, and the moving mold core 2 and the moving mold are integrally formed steel structural components.
[0037] In specific implementation methods, such as Figure 11 As shown, a magnetic suction element 3 is also provided on the fixed mold. The three magnetic suction elements 3 are arranged around the circumference of the fixed mold core 1 to attract the pad 100.
[0038] The above description is only a preferred embodiment of the present utility model and is 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. A core structure of an axial flow fan blade, characterized by comprising: include: A fixed mold core (1) is provided with a first end face (11), and the first end face (11) is provided with a positioning post (13). The positioning post (13) is provided with a plurality of positioning protrusions (14) arranged around its circumference. The moving mold core (2) has a second end face (21) and a forming plane (22) for forming a flat shaft hole. The forming plane (22) is located on the side wall of the moving mold core (2). The second end face (21) has a positioning groove (24). The positioning groove (24) has an abutment block (23). The abutment block (23) is located on the side of the positioning groove (24) close to the forming plane (22). The abutment block (23) is connected to the moving mold core (2). The abutment block (23) has an abutment plane. The abutment plane is flush with the second end face (21). After the mold is closed, the first end face (11) abuts against the second end face (21), the positioning post (13) is inserted into the positioning groove (24), the positioning protrusion (14) abuts against the side wall of the positioning groove (24), and the abutting plane abuts against the first end face (11).
2. The mold core structure of an axial flow fan blade according to claim 1, wherein The abutting block (23) is an arc-shaped block, and the end of the arc-shaped block abuts against the positioning protrusion (14).
3. The mold core structure of an axial fan blade according to claim 2, wherein One end of the arc-shaped block abuts against the positioning protrusion (14), and the other end abuts against another positioning protrusion (14).
4. The mold core structure of an axial fan blade according to claim 1, wherein The abutting block (23) and the moving mold core (2) are integrally formed structural components, and the positioning post (13) and the fixed mold core (1) are integrally formed structural components.
5. The mold core structure of an axial fan blade according to claim 1, wherein The bottom of the positioning groove (24) is provided with a limiting groove (25), the abutting block (23) is located in the limiting groove (25), and the abutting plane is flush with the bottom of the groove; the first end face (11) is provided with a boss (12), the shape of the boss (12) is adapted to the shape of the positioning groove (24), the positioning post (13) is connected to the boss (12), the positioning protrusion (14) can abut against the side wall of the limiting groove (25), the boss (12) can abut against the bottom of the groove, and the boss (12) can abut against the abutting plane.
6. The core structure of an axial fan blade according to claim 5, wherein The positioning groove (24) is a frustum-shaped groove.
7. The mold core structure of an axial fan blade according to claim 1, wherein The three positioning protrusions (14) are arranged around the circumference of the positioning post (13).
8. A core structure for a propeller blade according to any one of claims 1 to 7, wherein Both the fixed mold core (1) and the moving mold core (2) are steel structural components.
9. A molding die for an axial flow fan blade, comprising a fixed die, a moving die, and a core structure for an axial flow fan blade as described in any one of claims 1-8, wherein the fixed die core (1) is connected to the fixed die, the moving die core (2) is connected to the moving die, the fixed die is provided with a first molding groove, the moving die is provided with a second molding groove, and the first molding groove and the second molding groove are engaged to form a molding space; the fixed die core (1) is located in the first molding groove, and the moving die core (2) is located in the second molding groove.
10. The forming mold for an axial flow fan blade according to claim 9, wherein The fixed mold core (1) is detachably connected to the fixed mold, and the moving mold core (2) is detachably connected to the moving mold.