A rotor injection mold

Abstract

This application discloses a rotor injection mold, comprising an upper mold, a middle mold, and a lower mold arranged sequentially from top to bottom. The lower edge of the upper mold and the upper edge of the middle mold, and the lower edge of the middle mold and the upper edge of the lower mold, are respectively fitted by vertical steps. An injection runner is provided on the upper surface of the upper mold, and the injection runner has a through-channel that penetrates the upper mold and extends into the interior of the mold. The middle mold includes multiple identical circumferentially distributed splicing modules, with adjacent splicing modules fitted by axially distributed steps. The lower mold has a through-hole at its center, penetrating vertically, and an insert is disposed in the through-hole. The insert has a clearance fit with the rotor blades in the area below the rotor blade shaft and a tight fit with the rotor bearing seat inside the rotor disk. Using this mold for rotor injection results in minimal mold deformation and no bulging or chipping, thus ensuring a long mold lifespan. Minimal mold deformation also ensures uniform product dimensions and high quality.

Description

Technical Field

[0001] This application relates to a mold, and more particularly to a rotor injection mold. Background Technology

[0002] In conventional rotor vulcanization production, due to the large size of the rotors and the different requirements of flotation equipment, there are many types, specifications, complex structures, and small production quantities of rotors. The rotors are generally designed as semi-open molding dies. This type of die is economical and suitable for the production of such products.

[0003] The frame of this type of mold is generally divided into equal parts, which is consistent with the number of rotor blades. The concave and convex grooves are designed to fit together and lock each other. The upper and lower parts of the frame are made with locking grooves to cooperate with the upper and lower molds. When the mold is closed, the whole mold is locked and sealed.

[0004] However, due to the high and thin blades of this type of rotor mold, filling with glue during product manufacturing is difficult, and it is generally done in sections. The high internal pressure during mold closing and pressing makes it impossible to accurately control the amount of glue. To ensure product molding quality, more glue is usually added, resulting in excessive pressure on the mold and potential deformation, causing the outer edge to tilt outwards and misalign. Furthermore, the locking grooves of the upper mold and the outer edge are prone to interlocking, significantly shortening the mold's lifespan. Additionally, the product dimensions cannot be guaranteed after mold expansion, leading to poor product appearance and numerous steps on the parting surface. Summary of the Invention

[0005] This application provides a rotor injection mold to solve the technical problems of excessive glue application leading to mold deformation, short mold lock groove life, and inability to guarantee product size and appearance when using traditional semi-open molding molds to prepare rotors.

[0006] A rotor injection mold includes an upper mold, a middle mold, and a lower mold arranged sequentially from top to bottom; The lower edge of the upper mold and the upper edge of the middle mold, and the lower edge of the middle mold and the upper edge of the lower mold are respectively connected by vertical steps; the upper surface of the upper mold is provided with an injection channel, which has a through channel that penetrates the upper mold and extends into the interior of the mold. The middle mold includes multiple identical splicing modules distributed circumferentially. Adjacent splicing modules are fitted together by steps distributed axially. The splicing surfaces on the sides of the splicing modules form a blade upper mold cavity that is clearance-fitted to the sidewall of the rotor blade. The inner end face of the splicing module forms a sidewall that is clearance-fitted to the rotating shaft of the rotor blade. The lower end face of the splicing module is concave, and the upper end face of the lower mold is concave. The lower end face of the splicing module and the upper end face of the lower mold fit together to form a space that can accommodate the rotor disk. The upper surface of the lower mold is provided with a blade lower mold cavity for clearance fit with the rotor blade. Each blade lower mold cavity and one of the blade upper mold cavities in the middle mold together form a complete mold cavity for the rotor blade. The center of the lower mold has a through hole running vertically. An insert is disposed in the through hole. The insert is clearance fit with the rotor blade in the area below the rotor blade shaft and tight fit with the rotor bearing seat on the inner side of the rotor disk.

[0007] Preferably, the splicing module is fan-shaped, including a frame located on the larger end of the fan ring and a splicing module body located on the smaller end of the fan ring relative to the frame. The portion of the splicing module that forms the mold cavity is located on the splicing module body.

[0008] Preferably, the upper surface of the frame is lower than the upper surface of the splicing module body, and the step surface forms an angle of 12°-15° with the vertical direction.

[0009] Preferably, the steps distributed along the axial direction are disposed on both sides of the frame, and the steps extend vertically through the entire middle mold.

[0010] Preferably, the lower surface of the frame is higher than the lower surface of the splicing module body, and the angle between the stepped surface and the vertical direction is 10°-12°.

[0011] Preferably, the injection channel includes multiple main channels radially distributed around the central axis of the mold, each main channel being connected to the upper edge of the mold cavity of one of the blades via a guide channel.

[0012] Preferably, it further includes an annular flow channel, which is coaxial with the central axis and connects to each main flow channel, and the guiding channel is disposed at the intersection of the main flow channel and the annular flow channel.

[0013] Preferably, the annular flow channel includes two channels, with the larger diameter annular flow channel corresponding to the upper edge of the rotor blade and the smaller diameter annular flow channel corresponding to the middle of the upper edge of the rotor blade. The inner end of the main flow channel is connected to one of the smaller diameter annular flow channels.

[0014] Preferably, the system further includes a plurality of auxiliary flow channels radially distributed around the central axis of the mold. The auxiliary flow channels are located inside the inner ring of the smaller annular flow channel. The auxiliary flow channels are connected to the upper edge of the rotor blade shaft through a connecting channel, and the distribution positions of the auxiliary flow channels are staggered from those of the main flow channel.

[0015] Preferably, both the upper and lower molds are provided with handles.

[0016] Beneficial effects This utility model provides a rotor injection mold. By setting up an upper mold, a middle mold, and a lower mold to cooperate with each other, the rotor is housed in the mold cavity. The rotor surface is covered with rubber by an injection channel. The flowing rubber can fill the gap between the cavity and the rotor metal, so the internal pressure of the mold is lower than that of traditional compression molding and there is no overfilling. The high temperature of the rubber during injection makes the fluidization time of the entire product controllable, the mold deformation is small, and there is no phenomenon of mold bulging or biting. This ensures that the mold has a long service life. At the same time, the small mold deformation also ensures that the product has uniform size and good quality. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the metal frame of the rotor in this embodiment.

[0018] Figure 2 This is a schematic diagram of the rotor after the metal frame has been coated with adhesive in this embodiment.

[0019] Figure 3 This is the embodiment. Figure 2 A cross-sectional view of the rotor after the motor has been installed.

[0020] Figure 4 This is a schematic diagram of the overall structure after mold closing in this embodiment.

[0021] Figure 5 This is a schematic diagram of the middle mold and lower mold parts in this embodiment.

[0022] Figure 6 This is a cross-sectional view of the rotor after it has been injected with glue in the mold in this embodiment.

[0023] Figure 7 This is a top view of the upper mold in this embodiment.

[0024] The meanings of the labels in the figures are as follows: Upper mold 1, middle mold 2, frame 3, lower mold 4, rubber layer 5, rotor blade 6, insert 7, handle 8, motor 9, rotor bearing seat 10, rotor blade disc 11, rotor blade shaft 12, main flow channel 13, first annular flow channel 14, second annular flow channel 15, guiding channel 16, auxiliary flow channel 17, first surface 18, second surface 19. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] like Figure 1 The image shows the object to be processed in an embodiment of this utility model, namely the metal frame of the rotor. This frame includes a hollow rotor blade 6 rotating shaft 12 disposed on the central axis and a rotor disk 11 coaxially spaced below it, as well as eight rotor blades 6 evenly distributed along the central axis. The rotor blades 6 are vertically fixed to the rotor blade 6 rotating shaft 12, and the rotor disk 11 and the rotor blades 6 are intersected and fixed. A coaxial rotor bearing seat 10 is provided at the center of the rotor disk 11 for connecting the bearing, and a connecting hole is provided at the bottom of the rotating shaft 12 bearing seat for connecting the rotor to the equipment. Figure 3 As shown, the cavity between the bearing housing and the rotor blade 6 shaft 12 is used to accommodate the motor 9 during subsequent rotor use.

[0029] Except for the exposed metal portion of the rotor bearing housing 10 located below the rotor disk 11, the rest of the metal frame of the aforementioned rotor needs to be covered with rubber before use, forming a shape as shown below. Figure 2 As shown, the metal frame is covered with a rubber layer 5.

[0030] An embodiment of this utility model provides a rotor injection mold, such as... Figures 4 to 7 As shown, the mold is cylindrical in shape and includes an upper mold 1, a middle mold 2, and a lower mold 4 arranged sequentially from top to bottom. Figure 4 As shown, handles 8 are provided on both the upper mold 1 and the lower mold 4 to facilitate the handling of the mold.

[0031] The lower edge of the upper mold 1 and the upper edge of the middle mold 2, and the lower edge of the middle mold 2 and the upper edge of the lower mold 4, are respectively connected by vertical steps, as shown in the figure. Figure 6 In the attached diagram, positions A and B indicate the mating stepped surfaces. These stepped surfaces ensure the upper, middle, and lower molds 4 are aligned and interlocked, preventing deviation from the central axis. Simultaneously, the stepped surfaces facilitate mold separation. In this embodiment, demolding is completed axially between the upper mold 1 and the middle mold 2, and between the middle mold 2 and the lower mold 4. The upper surface of the upper mold 1 is provided with an injection channel, which has a through-channel 16 that penetrates the upper mold 1 and extends into the interior of the mold.

[0032] like Figure 5 As shown, the middle mold 2 includes multiple identical splicing modules distributed circumferentially. To ensure the accurate positioning of the middle mold 2 relative to the lower mold, corresponding vertical positioning holes are provided on one of the splicing modules of the middle mold 2 and the lower mold 4. The positioning holes of the splicing module are aligned with the positioning holes on the lower mold 4. Then, the remaining splicing modules are placed sequentially in a clockwise direction. Adjacent splicing modules are connected by steps distributed axially. Here, the steps are as follows: Figure 5 The indicator at point C indicates that the step here is for the interlocking and positioning of adjacent splicing modules, preventing them from misaligning and disengaging along the axial direction. Multiple splicing modules ultimately complete a 360° assembly of the entire mold. Preferably, as shown... Figure 4 As shown, to facilitate the removal of the middle mold, lifting holes are provided on the outer side of the middle mold, and to facilitate lifting the middle mold, lifting holes are provided on the top of the middle mold. Figure 6 As shown, the metal frame of the rotor is mainly housed in the middle mold 2, and partly housed in the lower mold 4. Therefore, the splicing surfaces on the sides of the splicing module form a clearance fit with the upper mold 1 cavity of the rotor blade 6 sidewall, and the inner end face of the splicing module forms a clearance fit with the sidewall of the rotor blade 6 shaft 12. Figure 5 As shown, the lower end face of the splicing module is concave, and the upper end face of the lower mold 4 is concave. The lower end face of the splicing module and the upper end face of the lower mold 4 cooperate to form a space to accommodate the rotor disk 11.

[0033] like Figure 5As shown, the upper surface of the lower mold 4 is provided with a blade lower mold 4 cavity for clearance fit with the rotor blade 6. Each blade lower mold 4 cavity and one of the blade upper mold 1 cavities in the middle mold 2 together form a complete mold cavity of the rotor blade 6. The lower mold 4 has a through hole in the center that runs through the vertical direction. An insert 7 is arranged in the through hole. The insert 7 is clearance fit with the rotor blade 6 in the area below the rotor blade shaft 12 and tight fit with the rotor bearing seat 10 on the inner side of the rotor disk 11.

[0034] By using an upper mold 1, a middle mold 2, and a lower mold 4 that work together, the rotor is housed within the mold cavity. An injection runner coats the rotor surface with rubber, and the flowing rubber fills the gap between the cavity and the rotor metal. This results in lower internal mold pressure compared to traditional compression molding methods, less excessive weight packing, minimal mold deformation, and no bulging or chipping, ensuring a longer mold lifespan. Minimal mold deformation also guarantees consistent product dimensions and high quality. Furthermore, it reduces the time operators spend loading and unloading the mold. Since the rubber temperature reaches over 100 degrees Celsius during injection, the vulcanization time is significantly reduced. The mold is easy to disassemble and reassemble without prying, hammering, or vibration, indirectly extending its lifespan.

[0035] In some preferred embodiments, the splicing module is generally fan-shaped, including a frame 3 located on the larger end of the fan ring and a splicing module body located on the smaller end of the fan ring relative to the frame 3. The portion of the splicing module that forms the mold cavity is located on the splicing module body.

[0036] In some preferred embodiments, the upper surface of the frame 3 is lower than the upper surface of the splicing module body, and the stepped surface forms an angle of 12°-15° with the vertical direction. Therefore, the upper surface of the middle mold 2 forms a pattern that is high in the middle and low around the edges, corresponding to, as... Figure 6 As shown, the lower surface of the upper mold 1 has a concave shape in the middle, which mates with the middle mold 2. Similarly, the lower surface of the frame 3 is higher than the lower surface of the main body of the splicing module, and the angle between the stepped surface and the vertical direction is 10°-12°. Therefore, the lower surface of the middle mold 2 has a low center and high periphery, corresponding to, as Figure 6 As shown, the lower surface of the lower mold 4 has a convex shape in the middle, which matches the middle mold 2.

[0037] In some preferred embodiments, the steps distributed along the axial direction are... Figure 5 The steps indicated at point C are located on both sides of the frame 3, and extend vertically through the entire middle mold 2, providing axial fitting along the entire height direction, thereby ensuring that the positions of each splicing module of the middle mold 2 are relatively fixed. Specifically, as shown... Figure 5As shown, taking two adjacent splicing modules as an example, half of the upper mold cavity of one of the blades in the middle mold 2 is located in one of the splicing modules, and the contact surface of the main body of the splicing module is exactly located on the center line of the rotor blade 6. Since the frame 3 is set outside the splicing module, part of the step on the frame 3 is the first surface 18 that is in the same plane as the contact surface, and the other part is the second surface 19 that is offset from the contact surface in the circumferential direction. In the two splicing modules that cooperate with each other, one of the second surfaces 19 is offset clockwise relative to the first surface 18, and the other second surface 19 is offset counterclockwise relative to the first surface 18, so that the two second surfaces 19 can be engaged.

[0038] In some preferred embodiments, such as Figure 7 As shown, the injection channel includes multiple main channels 13 radially distributed around the central axis of the mold. Each main channel 13 is connected to the upper edge of one of the blade mold cavities 1 via a guide channel 16. In the figure, the starting end of each main channel 13 is close to the center of the mold, and the ending end is located at the periphery of the mold. The ending end extends a certain distance from the periphery of the mold. During injection, the glue flows into the mold from the guide channel 16, and some excess glue flows along the main channel 13.

[0039] In some preferred embodiments, in order to make the glue injection more uniform, an annular flow channel is also included. The annular flow channel is coaxial with the central axis and connects each main flow channel 13. The connecting channel 16 is disposed at the intersection of the main flow channel 13 and the annular flow channel.

[0040] In some preferred embodiments, the annular flow channel includes two channels: a second annular flow channel 15 with a larger diameter corresponds to the upper edge of the rotor blade 6, and a first annular flow channel 14 with a smaller diameter corresponds to the middle of the upper edge of the rotor blade 6. This allows the adhesive to flow evenly from above the rotor blade 6, thereby uniformly filling the cavity. The inner end of the main flow channel 13 is connected to one of the smaller annular flow channels.

[0041] In some preferred embodiments, a plurality of auxiliary flow channels 17 are further included, radially distributed around the central axis of the mold. The auxiliary flow channels 17 are located within the inner ring of the smaller annular flow channel. The auxiliary flow channels 17 are connected to the upper edge of the rotor blade 6 shaft 12 via a connecting channel 16, and the distribution of the auxiliary flow channels 17 is staggered from the main flow channel 13. Figure 7As shown, the main flow channel 13 includes 8 channels, and the auxiliary flow channel 17 also includes 8 channels, which are staggered from each other. The position of each main flow channel 13 relative to the central axis is between two auxiliary flow channels 17, and the position of each auxiliary flow channel 17 relative to the central axis is also between two main flow channels 13. The auxiliary flow channels 17 correspond to the position of the rotor blade 6 shaft 12 through the guide channel 16, which can uniformly inject glue into the area above the rotor blade 6 shaft 12.

[0042] In some preferred embodiments, a positioning hole is provided at the bottom of the lower mold to position the mold on the injection molding machine, so that the injection nozzle of the machine can be aligned with the corresponding guide channel.

[0043] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A rotor injection mold, characterized in that, It includes the upper mold, middle mold, and lower mold arranged from top to bottom; The lower edge of the upper mold and the upper edge of the middle mold, and the lower edge of the middle mold and the upper edge of the lower mold are respectively connected by vertical steps; the upper surface of the upper mold is provided with an injection channel, which has a through channel that penetrates the upper mold and extends into the interior of the mold. The middle mold includes multiple identical splicing modules distributed circumferentially. Adjacent splicing modules are fitted together by steps distributed axially. The splicing surfaces on the sides of the splicing modules form a blade upper mold cavity that is clearance-fitted to the sidewall of the rotor blade. The inner end face of the splicing module forms a sidewall that is clearance-fitted to the rotating shaft of the rotor blade. The lower end face of the splicing module is concave, and the upper end face of the lower mold is concave. The lower end face of the splicing module and the upper end face of the lower mold fit together to form a space that can accommodate the rotor disk. The upper surface of the lower mold is provided with a blade lower mold cavity for clearance fit with the rotor blade. Each blade lower mold cavity and one of the blade upper mold cavities in the middle mold together form a complete mold cavity for the rotor blade. The center of the lower mold has a through hole running vertically. An insert is disposed in the through hole. The insert is clearance fit with the rotor blade in the area below the rotor blade shaft and tight fit with the rotor bearing seat on the inner side of the rotor disk.

2. The rotor injection mold according to claim 1, characterized in that, The splicing module is generally fan-shaped, including a frame located on one side of the larger end of the fan ring and a splicing module body located on one side of the smaller end of the fan ring relative to the frame. The parts of the splicing module that form the mold cavity are all located on the splicing module body.

3. The rotor injection mold according to claim 2, characterized in that, The upper surface of the frame is lower than the upper surface of the splicing module body, and the step surface forms an angle of 12°-15° with the vertical direction.

4. The rotor injection mold according to claim 2, characterized in that, The steps distributed along the axial direction are provided on both sides of the frame, and the steps extend vertically through the entire middle mold.

5. The rotor injection mold according to claim 2, characterized in that, The lower surface of the frame is higher than the lower surface of the splicing module body, and the angle between the stepped surface and the vertical direction is 10°-12°.

6. The rotor injection mold according to claim 1, characterized in that, The injection channel includes multiple main channels radially distributed around the central axis of the mold, and each main channel is connected to the upper edge of the mold cavity of one of the blades through a guide channel.

7. The rotor injection mold according to claim 6, characterized in that, It also includes an annular flow channel, which is coaxial with the central axis and connects to each main flow channel, and the guiding channel is located at the intersection of the main flow channel and the annular flow channel.

8. The rotor injection mold according to claim 7, characterized in that, The annular flow channel includes two channels. The larger diameter annular flow channel corresponds to the upper edge of the rotor blade, and the smaller diameter annular flow channel corresponds to the middle of the upper edge of the rotor blade. The inner end of the main flow channel is connected to one of the smaller diameter annular flow channels.

9. The rotor injection mold according to claim 8, characterized in that, It also includes a plurality of auxiliary flow channels radially distributed around the central axis of the mold. The auxiliary flow channels are located inside the inner ring of the smaller annular flow channel. The auxiliary flow channels are connected to the upper edge of the rotor blade shaft through a connecting channel, and the distribution position of the auxiliary flow channels is staggered from that of the main flow channel.

10. The rotor injection mold according to any one of claims 1-9, characterized in that, Both the upper and lower molds are equipped with handles.

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