Replaceable ring mold

Abstract

The utility model discloses a replaceable mould of ring insert, including upper die, lower die and ring insert piece. Upper die is equipped with cavity. Lower die is fixedly connected with mould core, and lower die is located below upper die, and when the mould of upper die and lower die closes, the mould core is inserted into the cavity and forms the fan blade forming area. The ring insert piece is detachably connected to the lower end surface of the upper die, and the inner side wall of the ring insert piece extends into the cavity to form the fan blade frame forming surface. When the centrifugal fan blade is made, the mould of upper die and lower die is closed, the mould core is inserted into the cavity, the material enters the fan blade forming area to be shaped to form the centrifugal fan blade, the inner side wall of the ring insert piece forms the fan blade frame forming surface, and the ring insert piece is used for shaping the frame of the centrifugal fan blade. When the frame of the centrifugal fan blade has a large runout tolerance, the ring insert piece only needs to be detached from the upper die, and the ring insert piece can be burn welded and polished or directly replaced with a new ring insert piece, so that the whole upper die does not need to be detached, the maintenance cost and maintenance time are saved, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal fan technology, and in particular to a mold with replaceable insert rings. Background Technology

[0002] In the manufacturing process of centrifugal fan blades made of polypropylene, due to the significant shrinkage and deformation characteristics and insufficient stability of polypropylene, relying solely on mold temperature control and process parameter optimization is insufficient to effectively solve the problem of excessive runout tolerance at the fan blade edge. Therefore, repeated mold disassembly and assembly are necessary, along with welding and other operations on the mold area corresponding to the centrifugal fan blade frame to pre-compensate for deformation. However, the complex mold structure makes the disassembly and assembly process time-consuming and labor-intensive, and any misalignment during adjustment can easily lead to the complete scrapping of the mold core, resulting in high replacement costs. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a mold with replaceable inserts.

[0004] This utility model embodiment provides a mold for replaceable inserts, the mold for replaceable inserts comprising:

[0005] The upper mold has a cavity;

[0006] The lower mold is fixedly connected to a mold core. The lower mold is located below the upper mold. When the upper mold and the lower mold are closed, the mold core is inserted into the cavity to form the fan blade forming area.

[0007] An annular insert is detachably connected to the lower end face of the upper mold, and the inner sidewall of the annular insert extends into the cavity to form the fan blade frame forming surface.

[0008] According to some embodiments of the present invention, the lower end face of the upper mold is provided with a plurality of first threaded holes, which are distributed circumferentially along the upper mold. The annular insert is provided with a plurality of first mounting holes, which are distributed circumferentially along the annular insert. The mold with replaceable inserts further includes a plurality of first bolts, which pass through the first mounting holes and are threadedly connected to the first threaded holes. The first bolts press upward against the annular insert to fix the annular insert relative to the upper mold.

[0009] According to some embodiments of the present invention, the first mounting hole is an elongated through hole, and the two ends of the first mounting hole extend circumferentially along the length of the annular insert.

[0010] According to some embodiments of the present invention, the wall of the first mounting hole is provided with a first step portion, and the nut of the first bolt abuts against the first step portion.

[0011] According to some embodiments of the present invention, the lower end face of the annular insert is provided with a notch, and the mold for the replaceable insert further includes an insert block located within the notch. The insert block is detachably connected to the annular insert, and the side of the insert block near the axis of the annular insert constitutes the inner sidewall of the annular insert.

[0012] According to some embodiments of the present invention, the insert is provided with a second mounting hole, the annular insert is provided with a second threaded hole, and the mold for the replaceable insert further includes a second bolt. The second bolt passes through the second mounting hole and is threadedly connected to the second threaded hole. The second bolt presses upward against the insert so that the insert and the annular insert are relatively fixed.

[0013] According to some embodiments of the present invention, the wall of the second mounting hole is provided with a second step portion, and the nut of the second bolt abuts against the second step portion.

[0014] According to some embodiments of the present invention, the insert has multiple parts, the notch has multiple parts, the multiple notches are distributed circumferentially along the annular insert, and the multiple inserts correspond one-to-one with the multiple notches.

[0015] According to some embodiments of the present invention, the lower end face of the upper mold is provided with a first annular protrusion, and the inner peripheral wall of the first annular protrusion is attached to the outer peripheral wall of the annular insert.

[0016] According to some embodiments of the present invention, the lower end face of the upper mold is provided with a second annular protrusion, and an annular groove is formed between the first annular protrusion and the second annular protrusion, and the upper end of the annular insert is inserted into the annular groove.

[0017] The replaceable insert mold according to the embodiments of the present utility model has at least the following technical effects:

[0018] 1. When making centrifugal fan blades, the upper and lower molds are closed, the mold core is inserted into the cavity, and the material enters the fan blade forming area to be shaped and form a centrifugal fan blade. The inner side wall of the annular insert forms the fan blade frame forming surface. The annular insert is used to shape the frame of the centrifugal fan blade. When the frame of the centrifugal fan blade has a large runout tolerance, it is only necessary to remove the annular insert from the upper mold and weld and grind it or directly replace it with a new annular insert. There is no need to disassemble the entire upper mold, saving maintenance costs and maintenance time and improving production efficiency.

[0019] 2. Workers do not need to disassemble the entire upper mold; they only need to open the mold and remove the ring insert from below. This insert is lightweight and small, allowing it to be easily handled on a workbench or specialized machining equipment for precision operations. Welding, grinding, and measurement become exceptionally convenient and quick, eliminating the difficulties of "overhead welding" or "blind machining" on large molds. The upper mold body can be made of high-hardness, high-wear-resistant integral hardened steel (such as H13 or S136) to ensure durability and mold life during long-term production. The ring insert, on the other hand, can be made of mold steel with better toughness and easier welding and machining (such as P20 or 718H). This flexibility in material selection achieves the best balance between performance and maintainability, an advantage that integral molds cannot match.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a structural schematic diagram of a mold for a replaceable insert ring according to some embodiments of the present invention;

[0023] Figure 2 This is an exploded view of a mold for a replaceable insert ring according to some embodiments of the present invention;

[0024] Figure 3 This is a cross-sectional view of a mold for a replaceable insert ring according to some embodiments of the present invention;

[0025] Figure 4 This is a schematic diagram of the upper mold structure of some embodiments of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the annular insert and the insert block according to some embodiments of this utility model.

[0027] Icon labels:

[0028] Upper mold 100; cavity 110; fan blade forming area 120; first annular protrusion 131; second annular protrusion 132; annular groove 140;

[0029] Lower mold 200; mold core 210;

[0030] Circular insert 300; Fan blade frame molding surface 310; Notch 320; Inlay 330;

[0031] First threaded hole 400; First mounting hole 410; First stepped portion 420;

[0032] Second threaded hole 500; second mounting hole 510; second stepped portion 520. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0036] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0037] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0038] According to some embodiments of this utility model, refer to Figures 1 to 5 The replaceable insert mold includes an upper mold 100, a lower mold 200, and an annular insert 300. The upper mold 100 has a cavity 110. The lower mold 200 is fixedly connected to a mold core 210 and is located below the upper mold 100. When the upper mold 100 and the lower mold 200 are closed, the mold core 210 is inserted into the cavity 110 to form the fan blade forming area 120. The annular insert 300 is detachably connected to the lower end face of the upper mold 100, and the inner sidewall of the annular insert 300 extends into the cavity 110 to form the fan blade frame forming surface 310.

[0039] Understandably, when manufacturing centrifugal fan blades, the upper mold 100 and lower mold 200 are closed, the mold core 210 is inserted into the cavity 110, and the material enters the fan blade forming area 120 to be shaped and form a centrifugal fan blade. The inner sidewall of the annular insert 300 forms the fan blade frame forming surface 310. The annular insert 300 is used to shape the frame of the centrifugal fan blade. When the frame of the centrifugal fan blade has a large runout tolerance, it is only necessary to remove the annular insert 300 from the upper mold 100 and perform operations such as welding and grinding on the inner sidewall of the annular insert 300, or directly replace the new annular insert 300. There is no need to disassemble and repair or replace the entire upper mold 100, saving maintenance costs and maintenance time and improving production efficiency.

[0040] In traditional molds, the cavity 110, which determines the shape of the main fan blade, and the surface, which determines the precise dimensions of the frame, are integrated onto the same large piece of steel. This invention, by adding an independent annular insert 300, separates the fan blade frame forming surface 310, which is most prone to deformation and requires frequent modifications, from the large, expensive, and structurally complex upper mold 100 body. All high-risk operations such as welding, grinding, and replacement to pre-compensate for deformation are concentrated on this independent, relatively small, and structurally simple annular insert 300. Even if operational errors cause the annular insert 300 to be scrapped, its replacement cost is far lower than that of the entire upper mold 100 template.

[0041] Moreover, workers do not need to disassemble the entire upper mold 100; they only need to open the mold and remove the ring insert 300 from below. This insert is lightweight and small in size, making it easy to carry to a workbench or professional processing equipment for fine operations. Whether it is welding, grinding, or measuring, it becomes exceptionally convenient and quick, eliminating the dilemma of "overhead welding" or "blind processing" on a huge mold.

[0042] In addition, the upper mold 100 body can be made of high-hardness, high-wear-resistant integral quenched steel (such as H13, S136) to ensure durability and mold life during long-term production. The ring insert 300, on the other hand, can be made of mold steel with better toughness and easier welding and machining (such as P20, 718H). This flexibility in material selection achieves the best balance between performance and maintainability, an advantage that integral molds cannot match.

[0043] The annular insert 300 works in conjunction with the upper mold 100, lower mold 200, and mold core 210. The upper mold 100 and mold core 210 define the main components of the fan blades, such as the blades and hub, while the annular insert 300 precisely defines the outer frame that has the greatest impact on dynamic balance. After the mold is closed, they together form a complete, closed cavity 110, ensuring the smooth progress of the injection molding process. This design allows the mold to achieve unprecedented ease of maintenance while maintaining its original injection molding function.

[0044] According to some embodiments of this utility model, refer to Figure 4 and Figure 5 The lower end face of the upper mold 100 is provided with a plurality of first threaded holes 400, which are distributed circumferentially around the upper mold 100. The annular insert 300 is provided with a plurality of first mounting holes 410, which are distributed circumferentially around the annular insert 300. The mold with replaceable inserts also includes a plurality of first bolts. The first bolts pass through the first mounting holes 410, and the upper ends of the first bolts are inserted into the first threaded holes 400 and threadedly connected to the first threaded holes 400. The first bolts press upward against the annular insert 300, thereby fixing the annular insert 300 relative to the upper mold 100. The annular insert 300 and the upper mold 100 are detachably connected by the first bolts, and the connection is firm and easy to disassemble and assemble.

[0045] Preferred, refer to Figure 5 The first mounting hole 410 is an elongated through hole, with both ends extending circumferentially along the annular insert 300. It is understood that the number of first threaded holes 400 is greater than the number of first mounting holes 410. The first mounting holes 410 are elongated and arc-shaped, facilitating communication between the inner cavity of the first mounting hole 410 and the inner cavities of multiple first threaded holes 400, eliminating the need for precise hole alignment and simplifying assembly.

[0046] Understandably, in actual manufacturing, positional errors inevitably exist between the first threaded hole 400 of the upper die 100 and the first mounting hole 410 of the annular insert 300. If both were round holes, precise alignment would be required to insert the bolt, which would consume a significant amount of alignment time. The elongated design of the first mounting hole 410 provides an adjustment range in the circumferential direction, allowing workers to easily insert the bolt with only approximate alignment, greatly reducing assembly difficulty and shortening assembly time. Furthermore, it also gives the annular insert 300 the ability to make minor rotational adjustments in the circumferential direction. In some cases, the deformation of the fan blade may not be entirely radial, but may also involve slight torsion. This torsional deformation can be compensated for by loosening all bolts, slightly rotating the annular insert 300 by an angle, and then tightening it again. Additionally, the upper die 100 has more first threaded holes 400 than the annular insert 300, meaning one first mounting hole 410 can correspond to two to three first threaded holes 400 on the upper die 100. If one of the first threaded holes 400 becomes stripped or damaged due to repeated disassembly and assembly, the worker can directly use the adjacent spare first threaded hole 400 without having to perform drilling, tapping, or other repair work on the expensive upper die 100, thus indirectly extending the service life of the upper die 100. This also means that the same upper die 100 can accommodate multiple annular inserts 300 with slight differences in the position of the first mounting hole 410, increasing versatility.

[0047] Preferred, refer to Figure 5The first mounting hole 410 has a first step 420 on its wall. The nut of the first bolt abuts against the first step 420. The first bolt applies force to the first step 420, so that the first bolt presses the annular insert 300 against the upper mold 100.

[0048] According to some embodiments of this utility model, refer to Figure 5 The lower end face of the annular insert 300 has a notch 320. The mold for replacing the insert also includes an insert block 330, which is located within the notch 320. The insert block 330 is detachably connected to the annular insert 300, and the side of the insert block 330 closest to the axis of the annular insert 300 forms the inner sidewall of the annular insert 300. It is understood that when the area requiring repair or replacement is on the insert block 330, only the insert block 330 needs to be replaced, without disassembling the entire annular insert 300, thereby further saving time and improving production efficiency.

[0049] According to some embodiments of this utility model, refer to Figure 5 The insert 330 has a second mounting hole 510, and the annular insert 300 has a second threaded hole 500. The mold for replacing the insert also includes a second bolt, which passes through the second mounting hole 510 and is threaded into the second threaded hole 500. The second bolt presses upward against the insert 330, fixing the insert 330 and the annular insert 300 relative to each other. The second bolt enables a detachable connection between the annular insert 300 and the insert 330, providing a secure connection that is easy to install and remove.

[0050] Preferred, refer to Figure 5 The second mounting hole 510 has a second stepped portion 520 on its wall, and the nut of the second bolt abuts against the second stepped portion 520. The second bolt applies force to the second stepped portion 520, so that the second bolt presses the insert 330 against the annular insert 300.

[0051] According to some embodiments of this utility model, there are multiple inserts 330 and multiple notches 320. The multiple notches 320 are distributed circumferentially along the annular insert 300, and the multiple inserts 330 correspond one-to-one with the multiple notches 320. The multiple inserts 330 are distributed circumferentially, thereby increasing the proportion of the inserts 330 forming the inner sidewall of the annular insert 300. However, when the inner sidewall of the annular insert 300 at any position needs to be repaired or replaced, it is only necessary to disassemble and repair or replace the corresponding insert 330.

[0052] According to some embodiments of this utility model, refer to Figure 3 and Figure 4The lower end face of the upper mold 100 is provided with a first annular protrusion 131, and the inner peripheral wall of the first annular protrusion 131 fits against the outer peripheral wall of the annular insert 300, which facilitates the positioning of the annular insert 300. Preferably, the lower end face of the upper mold 100 is provided with a second annular protrusion 132, and an annular groove 140 is formed between the first annular protrusion 131 and the second annular protrusion 132. The upper end of the annular insert 300 is inserted into the annular groove 140, and the groove can restrict the movement of the annular insert 300 in the horizontal direction.

[0053] In this specification, the reference to the term "some embodiments" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A mold with replaceable inserts, characterized in that, include: The upper mold (100) is provided with a cavity (110); The lower mold (200) is fixedly connected with the mold core (210). The lower mold (200) is located below the upper mold (100). When the upper mold (100) and the lower mold (200) are closed, the mold core (210) is inserted into the cavity (110) to form the fan blade forming area (120). An annular insert (300) is detachably connected to the lower end face of the upper mold (100), and the inner sidewall of the annular insert (300) extends into the cavity (110) to form the fan blade frame forming surface (310).

2. The mold for replaceable inserts according to claim 1, characterized in that, The lower end face of the upper mold (100) is provided with a plurality of first threaded holes (400), which are distributed circumferentially along the upper mold (100). The annular insert (300) is provided with a plurality of first mounting holes (410), which are distributed circumferentially along the annular insert (300). The mold with replaceable inserts also includes a plurality of first bolts, which pass through the first mounting holes (410) and are threadedly connected to the first threaded holes (400). The first bolts press upward against the annular insert (300) to fix the annular insert (300) relative to the upper mold (100).

3. The mold for the replaceable insert ring according to claim 2, characterized in that, The first mounting hole (410) is an elongated through hole, and the two ends of the first mounting hole (410) extend along the circumference of the annular insert (300) along the length direction.

4. The mold for replaceable inserts according to claim 2, characterized in that, The first mounting hole (410) has a first stepped portion (420) on its hole wall, and the nut of the first bolt abuts against the first stepped portion (420).

5. The mold for replaceable inserts according to claim 1, characterized in that, The lower end face of the annular insert (300) is provided with a notch (320). The mold for the replaceable insert also includes an insert block (330). The insert block (330) is located in the notch (320). The insert block (330) is detachably connected to the annular insert (300). The side of the insert block (330) near the axis of the annular insert (300) forms the inner sidewall of the annular insert (300).

6. The mold for the replaceable insert ring according to claim 5, characterized in that, The insert (330) is provided with a second mounting hole (510), the annular insert (300) is provided with a second threaded hole (500), and the mold for the replaceable insert also includes a second bolt. The second bolt passes through the second mounting hole (510) and is threadedly connected to the second threaded hole (500). The second bolt presses upward against the insert (330) so that the insert (330) and the annular insert (300) are relatively fixed.

7. The mold for replaceable inserts according to claim 6, characterized in that, The second mounting hole (510) has a second stepped portion (520) on its hole wall, and the nut of the second bolt abuts against the second stepped portion (520).

8. The mold for the replaceable insert ring according to claim 5, characterized in that, The insert (330) has multiple parts, and the notch (320) has multiple parts. The multiple notches (320) are distributed circumferentially along the annular insert (300), and the multiple inserts (330) correspond one-to-one with the multiple notches (320).

9. The mold for the replaceable insert ring according to claim 1, characterized in that, The lower end face of the upper mold (100) is provided with a first annular protrusion (131), and the inner peripheral wall of the first annular protrusion (131) is attached to the outer peripheral wall of the annular insert (300).

10. The mold for the replaceable insert ring according to claim 9, characterized in that, The lower end face of the upper mold (100) is provided with a second annular protrusion (132), and an annular groove (140) is formed between the first annular protrusion (131) and the second annular protrusion (132). The upper end of the annular insert (300) is inserted into the annular groove (140).

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