A mold
By designing inclined cores and sliding module components in the mold, combined with guide surfaces and elastic components, the interference problem during demolding of products with negative angles was solved, achieving high molding yield and stable production.
Patent Information
- Application Number
- CN202611395930.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-09
- Publication Date
- 2026-11-06
AI Technical Summary
Existing injection molds have difficulty handling products with negative angle structures during demolding, which can easily lead to surface scratches or deformation, resulting in low molding yield and failing to meet the needs of mass production.
A mold structure was designed, in which the first core is set at an angle and the second core is set at a vertical angle. The modular components include the first module that slides at an angle and the second and third modules that slide relative to each other. Through a specific mold opening sequence and components such as guide surfaces and guide pillars, interference between the modules and the product is avoided during demolding. Elastic components are used to achieve rapid demolding.
It effectively avoids interference during demolding, prevents product tearing or deformation, improves molding yield, and ensures product integrity and production stability.
Smart Images
Figure CN123040291A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of mold technology, and in particular to a mold. Background Technology
[0002] In injection molding, there is a type of injection molded product where the lower part extends horizontally and the upper part extends downward at an angle, creating a negative angle between the upper and lower parts. Because this negative angle structure interferes with the mold opening and ejection directions, during demolding, the mold cavity wall directly scrapes and pulls on the corresponding parts of the product, easily causing surface scratches or deformation. In severe cases, defects such as tearing or material breakage may occur.
[0003] Most existing conventional injection mold structures are only suitable for demolding products with positive angle structures, and are difficult to adapt to products with downward tilt forming negative angles. If conventional molds are used for production, the product molding yield is low, the production stability is poor, and the needs of mass production cannot be met. Summary of the Invention
[0004] To address the shortcomings of the prior art, the present invention provides a mold that avoids interference between the module and the product during demolding, thereby preventing the product from being pulled or deformed and improving the molding yield.
[0005] The technical effects to be achieved by this invention are realized through the following technical solutions: This invention provides a mold, comprising: A first mold base, wherein a first core and a second core are provided on the surface of the first mold base, the first core is inclined along a first horizontal direction, and the second core is arranged vertically with its first end connected to the first core; and The modular assembly includes a first module, a second module, and a third module. The first module is slidably disposed above the first core along a first horizontal direction and forms a first cavity with the first core. The second module and the third module are slidably disposed on opposite sides of the second core along a second horizontal direction and form a second cavity with the second core. The second cavity is connected to the first cavity. During mold opening, the second module and the third module move away from each other along the second horizontal direction, while the first module tilts upward along the first horizontal direction to complete demolding.
[0006] In some implementations, the mold further includes a second mold base, which is slidably disposed above the module assembly in a vertical direction, and a third core is provided on the side of the second mold base near the module assembly. The third core is located above the second core and forms a third cavity with the second module and the third module. The third cavity is in communication with the second cavity.
[0007] In this implementation, a block is provided on the side of the third core near the second core. When the mold is closed, the block is located above the second core and between the second and third modules, so that the upper part of the product has a groove structure to adapt to the product molding requirements.
[0008] In some implementations, the second mold base has an inclined first guide surface, and the second module and the third module have inclined second guide surfaces, with the second guide surface slidingly attached to the first guide surface.
[0009] In this implementation, when the mold is opened, the first mold base moves downward. At this time, the first guide surface and the second guide surface cooperate to decompose the vertical downward movement into a horizontal outward thrust, so that the second module and the third module move away from each other along the second horizontal direction at the same time, thereby achieving lateral demolding and releasing the restriction on the upper and middle parts of the product.
[0010] In some implementations, the second module base is further provided with a limiting block, which is located on a path where the second module and the third module are far apart from each other along a second horizontal direction.
[0011] In some implementations, the mold further includes an elastic component, which includes a guide post and an elastic element. The guide post has its second guide surface inclined between the first mold base and the second mold base, and is connected to the second module and the third module respectively. The elastic element is sleeved on the guide post and its opposite ends abut against the first mold base and the second mold base respectively.
[0012] In some implementations, the second and third modules are provided with guide holes, the guide post is disposed in the guide hole, and one end of the guide post is connected to the second mold base.
[0013] In this implementation, at the moment of mold opening, the elastic element releases stress and is ejected along the inclined direction of the guide post, thereby causing the second and third modules to be ejected along the direction of the guide post. In this way, the second and third modules can be separated from the product at the moment of mold opening, achieving rapid demolding.
[0014] In some implementations, the elastic component further includes an elastic gasket disposed between the second module and the second mold base; and / or The elastic gasket is disposed between the third module and the second mold base.
[0015] In some implementations, a limiting guide rail is provided on the first guide surface, and a limiting groove is provided on the second guide surface to slide in cooperation with the limiting guide rail.
[0016] In some implementations, a guide rail assembly is further provided on the surface of the first module base. The guide rail assembly is inclined along a first horizontal direction, and the first module is slidably connected to the guide rail assembly.
[0017] In some implementations, the guide rail assembly includes a first guide rail and a second guide rail, with the two opposite sides of the first module slidably connected to the first guide rail and the second guide rail, respectively.
[0018] In summary, the present invention has at least the following advantages: The mold provided by this invention has a first core inclined along a first horizontal direction, a second core extending vertically and connected at one end to the end of the first core, a first module and the first core forming a first cavity, and a second module and a third module together forming a second cavity with the second core. The second cavity is connected to the first cavity. During mold opening, the second and third modules are driven to move away from each other along a second horizontal direction, and then the first module is driven to tilt upward along the first horizontal direction to match the negative angle structure of the product. This avoids interference between the modules and the product during demolding, thereby preventing the product from being scratched or deformed and improving the molding yield. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the mold structure in Example 1; Figure 2 for Figure 1 The image shows a partial exploded view of the mold. Figure 3 for Figure 2 The image shows a magnified view of the mold at point A. Figure 4 This is a schematic diagram of the mold structure in Example 2; Figure 5 for Figure 4 A cross-sectional view of the mold shown; Figure 6 This is a schematic diagram of the structure of the elastic component in Example 2; Figure 7 This is a schematic diagram of the mold structure for Example 3.
[0020] Marked in the image: 100. First mold base; 101. Guide groove; 110. First core; 120. Second core; 130. Limiting block; 140. Guide rail assembly; 141. First guide rail; 142. Second guide rail; 200. Module component; 210. First module; 211. First cavity; 220. Second module; 221. Second cavity; 222. Second guide surface; 2221. Limiting groove; 223. Guide hole; 230. Third module; 300, Second mold base; 310, Third core; 311, Third cavity; 320, First guide surface; 321, Limiting guide rail; 400, Elastic component; 410, Guide post; 420, Elastic element; 430, Elastic gasket. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of the present invention.
[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.
[0023] Example 1: Please see the appendix Figure 1 ~Appendix Figure 3 The mold of the present invention includes a first mold base 100 and a module assembly 200.
[0024] In this regard, please combine Figures 1-3 , Figure 1 The diagram illustrates the overall structure of the mold in an embodiment of the present invention. Figure 2 The diagram illustrates the structural relationship between the first module base 100 and the module component 200 in an embodiment of the present invention. Figure 3 The structural relationship between the first cavity 211 and the second cavity 221 in an embodiment of the present invention is illustrated. For ease of description, an example of the first horizontal direction, the second horizontal direction, and the vertical direction is defined, specifically as follows: Figure 2 As shown, the XYZ coordinate axes are defined, where the first horizontal direction is parallel to the X-axis, the second horizontal direction is parallel to the Y-axis, and the vertical direction is parallel to the X-axis. These three directions are orthogonal to each other. It is understandable that the first horizontal direction, the second horizontal direction, and the vertical direction may not be orthogonal to each other, or may be partially orthogonal.
[0025] Specifically, the surface of the first mold base 100 is provided with a first core 110 and a second core 120. The first core 110 is inclined along a first horizontal direction, and the second core 120 is vertically arranged with its first end connected to the first core 110. The module assembly 200 includes a first module 210, a second module 220, and a third module 230. The first module 210 is inclined and slidably disposed above the first core 110 along the first horizontal direction, forming a first cavity 211 with the first core 110. The second module 220 and the third module 230 are slidably disposed on opposite sides of the second core 120 along a second horizontal direction, forming a second cavity 221 with the second core 120. The second cavity 221 communicates with the first cavity 211. During mold opening, the second module 220 and the third module 230 move away from each other along the second horizontal direction, and the first module 210 tilts upward along the first horizontal direction to complete demolding.
[0026] In this embodiment, the first horizontal direction is perpendicular to the second horizontal direction; the first core 110 is inclined upward along the first horizontal direction, and the second core 120 extends vertically and its first end is connected to the end of the first core 110, forming an acute angle between the first core 110 and the second core 120; the first module 210 is inclined upward along the first horizontal direction and can slide relative to the first core 110 along the inclined direction to form a first cavity 211 with the first core 110 in the mold-closed state; the second module 220 and the third module 230 slide relative to each other on opposite sides of the second core 120 along the second horizontal direction, and together with the second core 120 to form a second cavity 221 in the mold-closed state; the second cavity 221 is connected to the first cavity 211; the upper part of the second cavity 221 is parallel to the horizontal plane, so that the upper and lower parts of the injection molded product form a negative angle structure.
[0027] It should be noted that the lower part of the product is formed in the first cavity 211, and the middle and upper parts of the product are formed in the second cavity 221.
[0028] Specifically, during the mold opening process, the second module 220 and the third module 230 are first driven to move away from each other along the second horizontal direction, disengaging from the second core 120. This releases the constraints on the upper side walls of the product and the binding of the middle part of the product, while simultaneously releasing the contact limit of the first module 210. At this point, the upper and middle parts of the product are no longer held by the first module 210 and the second module 220, and a clearance space is reserved for the subsequent demolding of the lower part of the product, which is tilted, to prevent the product from being stretched and deformed during demolding. After the second module 220 and the third module 230 have completed demolding, the first module 210 is driven to tilt and slide upward along the first horizontal direction. The movement trajectory of the first module 210 is consistent with the upward tilting direction of the first core 110, gradually disengaging from the first core 110 and realizing the demolding of the lower part of the product. After the first module 210 reaches the preset demolding stroke in the oblique ejection movement, the upper and lower parts of the product are separated from the core and the forming surface of the module, realizing the release of the negative angle structure, avoiding interference and scratches caused by vertical mold opening, thereby avoiding problems such as scratches or deformation of the product.
[0029] During the mold closing stage, the first module 210 is first driven to slide downward along the first horizontal direction and reset to the mold closing reference position, forming the first cavity 211 together with the first core 110. Then, the second module 220 and the third module 230 are driven to move closer to each other along the second horizontal direction, forming the second cavity 221 together with the second core 120, which facilitates the next round of mold opening and demolding cycle.
[0030] In the aforementioned mold, the first core 110 is inclined along the first horizontal direction, and the second core 120 extends vertically and is connected at one end to the end of the first core 110. The first module 210 and the first core 110 form the first cavity 211. The second module 220 and the third module 230 together with the second core 120 form the second cavity 221. The second cavity 221 is connected to the first cavity 211. When the mold is opened, the second module 220 and the third module 230 are driven to move away from each other along the second horizontal direction, and then the first module 210 is driven to tilt upward along the first horizontal direction to eject. This action sequence matches the negative angle structure of the product, avoids interference between the module and the product during demolding, and thus prevents the product from being torn or deformed, thereby improving the molding yield.
[0031] Example 2: The difference between this embodiment and Embodiment 1 is that this embodiment further optimizes the structure of the mold of the present invention. Please refer to the appendix. Figure 1 ~Appendix Figure 6 .
[0032] In this regard, please combine Figures 1-3 , Figure 1 The diagram illustrates the structural relationship between the first mold base 100 and the second mold base 300 in an embodiment of the present invention. Figure 2and Figure 3 The diagram illustrates the structural relationship between the third core 310, the second module 220, and the third module 230 in an embodiment of the present invention. Specifically, the mold further includes a second mold base 300, which is slidably disposed above the module assembly 200 in a vertical direction. The third core 310 is provided on the side of the second mold base 300 near the module assembly 200. The third core 310 is located above the second core 120 and forms a third cavity 311 with the second module 220 and the third module 230. The third cavity 311 communicates with the second cavity 221.
[0033] In this embodiment, the upper part of the product is formed within the second cavity 221 and the third cavity 311. During mold opening, the first mold base 100 slides downwards in the vertical direction, separating the second core 120 from the third core 310, thus releasing the product from its confinement and achieving demolding. Specifically, the third core 310 has a mold block on its side near the second core 120. This mold block is located above the second core 120 in the mold-closed state and is also positioned between the second module 220 and the third module 230, giving the upper part of the product a groove structure to accommodate product molding requirements.
[0034] In some preferred embodiments, please refer to Figure 4 and Figure 5 , Figure 4 and Figure 5 The diagram illustrates the structural relationship between the first guide surface 320 and the second guide surface 222 in an embodiment of the present invention. Specifically, the second mold base 300 has an inclined first guide surface 320, and the second module 220 and the third module 230 have inclined second guide surfaces 222. The second guide surfaces 222 slide against the first guide surface 320. When the mold is opened, the first mold base 100 moves downward. At this time, the first guide surface 320 and the second guide surface 222 cooperate to decompose the vertical downward movement into a horizontal outward thrust, so that the second module 220 and the third module 230 move away from each other simultaneously along the second horizontal direction, realizing lateral demolding and releasing the restriction on the upper and middle parts of the product.
[0035] In some preferred embodiments, the second mold base 300 is further provided with a limiting block 130, which is located on a path where the second module 220 and the third module 230 move away from each other along a second horizontal direction. During mold opening, the second module 220 and the third module 230 move away from each other along the second horizontal direction until they abut against the limiting block 130. The limiting block 130 restricts the movement of the second module 220 and the third module 230, causing them to move downward along the vertical direction along with the first mold base 100 to complete the demolding action.
[0036] In some preferred embodiments, please refer to Figure 6 , Figure 6The diagram illustrates the structural relationship between the elastic component 400 and the second module 220 and the third module 230 in an embodiment of the present invention. Specifically, the mold further includes the elastic component 400, which includes a guide post 410 and an elastic element 420. The inclined direction of the second guide surface 222 of the guide post 410 is located between the first mold base 100 and the second mold base 300, and is connected to the second module 220 and the third module 230 respectively. The elastic element 420 is sleeved on the guide post 410, and its opposite ends abut against the first mold base 100 and the second mold base 300 respectively. In the mold-closed state, the elastic element 420 is compressed by the first mold base 100 and the second mold base 300, causing it to be in a contracted state. At the moment of mold opening, the elastic element 420 releases stress, so that while the second module 220 and the third module 230 move away from each other, the second module 220 and the third module 230 are pushed by the elastic element 420. That is, the elastic element 420 pushes the first module 210 and the second module 220 to move along the inclined direction of the second guide surface 222, instantly releasing the contact with the product, thus avoiding the problem of tearing the product surface during slow demolding.
[0037] In some preferred embodiments, the second module 220 and the third module 230 are provided with guide holes 223, and guide posts 410 are disposed in the guide holes 223, with one end of each post connected to the second mold base 300. At the moment of mold opening, the elastic element 420 releases stress and is ejected along the inclined direction of the guide post 410, thereby causing the second module 220 and the third module 230 to be ejected at an inclined direction along the guide post 410. In this way, the second module 220 and the third module 230 can be separated from the product at the moment of mold opening, achieving rapid demolding and avoiding the problem of surface scratches caused by slow demolding.
[0038] In some more preferred embodiments, the elastic component 400 further includes an elastic pad 430 disposed between the second module 220 and the second mold base 300; and / or the elastic pad 430 disposed between the third module 230 and the second mold base 300. At the moment of mold opening, the elastic pad 430 releases stress, applying elastic force to the second module 220 and the third module 230, pushing them to move. Combined with the elastic action of the elastic element 420, this pushes the second module 220 and the third module 230 to instantly detach from the product, thereby avoiding the problem of surface scratches caused by slow demolding.
[0039] Example 3: The difference between this embodiment and Embodiment 2 is that this embodiment further optimizes the structure of the mold of the present invention. Please refer to the appendix. Figure 7 .
[0040] The first guide surface 320 is provided with a limiting guide rail 321, and the second guide surface 222 is provided with a limiting groove 2221 that slides with the limiting guide rail 321.
[0041] In this embodiment, when the mold is opened, the second module 220 and the third module 230 move away from each other until they come into contact with the limiting block 130. The first mold base 100 will continue to move vertically to demold. At this time, the limiting guide rail 321 slides along the limiting slide groove 2221, which enhances the stability of the sliding connection between the first mold base 100 and the second mold base 300, so as to make the overall structure more reliable.
[0042] In some preferred embodiments, a guide rail assembly 140 is further provided on the surface of the first mold base 100. The guide rail assembly 140 is inclined along a first horizontal direction, and the first module 210 is slidably connected to the guide rail assembly 140. The first module 210 is slidably connected to the first mold base 100 through the guide rail assembly 140, which enhances the sliding stability of the first module 210, so as to make the mold closing and opening process more stable.
[0043] In some preferred embodiments, the guide rail assembly 140 includes a first guide rail 141 and a second guide rail 142, with the opposite sides of the first module 210 slidably connected to the first guide rail 141 and the second guide rail 142, respectively. The first guide rail 141 and the second guide rail 142 are respectively disposed on opposite sides of the surface of the first mold base 100, and the first module 210 is disposed between the first guide rail 141 and the second guide rail 142 so as to be clamped by the first guide rail 141 and the second guide rail 142, which not only makes the sliding of the first module 210 more stable, but also enhances the stability of the structural assembly.
[0044] In some preferred embodiments, a guide groove 101 is formed on the first mold base 100, a first guide rail 141 is disposed on the first side wall of the guide groove 101, and a second guide rail 142 is disposed on the second side wall of the guide groove 101. The first module 210 is installed in the guide groove 101, which makes the overall structure more compact, thereby reducing the overall volume of the mold. Furthermore, the mold also includes a driving component for driving the first module 210 to move. The driving component is installed inside the first mold base 100, further reducing the overall volume of the mold. Preferably, the driving component can be a hydraulic cylinder.
[0045] In the mold of the present invention, a first core 110 is inclined along a first horizontal direction, a second core 120 extends vertically and one end is connected to the end of the first core 110, a first module 210 and the first core 110 form a first cavity 211, a second module 220 and a third module 230 together with the second core 120 form a second cavity 221, and the second cavity 221 is connected to the first cavity 211. When the mold is opened, the second module 220 and the third module 230 are driven to move away from each other along a second horizontal direction, and then the first module 210 is driven to tilt upward along the first horizontal direction to eject. This action sequence matches the negative angle structure of the product, avoids interference between the module and the product when demolding, thereby preventing the product from being torn or deformed, and improving the molding yield.
[0046] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0047] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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 invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0048] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0049] In this invention, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0050] Although the description of the invention has been given in conjunction with the specific embodiments described above, it will be apparent to those skilled in the art that many substitutions, modifications, and variations can be made based on the foregoing. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.
Claims
1. A mold characterized in that, include: A first mold base (100) has a first core (110) and a second core (120) on its surface. The first core (110) is inclined along a first horizontal direction, and the second core (120) is vertically arranged with its first end connected to the first core (110). The module assembly (200) includes a first module (210), a second module (220) and a third module (230). The first module (210) is slidably disposed above the first core (110) along a first horizontal direction and forms a first cavity (211) with the first core (110). The second module (220) and the third module (230) are slidably disposed on opposite sides of the second core (120) along a second horizontal direction and form a second cavity (221) with the second core (120). The second cavity (221) is connected to the first cavity (211). During mold opening, the second module (220) and the third module (230) move away from each other along the second horizontal direction, and the first module (210) tilts upward along the first horizontal direction to complete the demolding.
2. The mold of claim 1, wherein It also includes a second mold base (300), which is slidably disposed above the module assembly (200) in the vertical direction, and a third core (310) is provided on the side of the second mold base (300) near the module assembly (200). The third core (310) is located above the second core (120) and forms a third cavity (311) with the second module (220) and the third module (230). The third cavity (311) is connected to the second cavity (221).
3. The mold of claim 2, wherein, The second mold base (300) has an inclined first guide surface (320), the second module (220) and the third module (230) have inclined second guide surfaces (222), and the second guide surface (222) slides against the first guide surface (320).
4. The mold according to claim 3, characterized in that, The second mold base (300) is also provided with a limiting block (130), which is located on the path where the second module (220) and the third module (230) are far apart from each other along the second horizontal direction.
5. The mold according to claim 3, characterized in that, It also includes an elastic component (400), which includes a guide post (410) and an elastic element (420). The guide post (410) is inclined between the first mold base (100) and the second mold base (300) in the direction of the second guide surface (222), and is connected to the second module (220) and the third module (230) respectively. The elastic element (420) is sleeved on the guide post (410) and its opposite ends abut against the first mold base (100) and the second mold base (300) respectively.
6. The mold according to claim 5, characterized in that, The second module (220) and the third module (230) are provided with guide holes (223), and the guide post (410) is provided in the guide hole (223), and one end of the guide post is connected to the second mold base (300).
7. The mold according to claim 5, characterized in that, The elastic component (400) further includes an elastic gasket (430) disposed between the second module (220) and the second mold base (300); and / or The elastic gasket (430) is disposed between the third module (230) and the second mold base (300).
8. The mold according to claim 4, characterized in that, The first guide surface (320) is provided with a limiting guide rail (321), and the second guide surface (222) is provided with a limiting groove (2221) that slides with the limiting guide rail (321).
9. The mold according to claim 1, characterized in that, The first module (210) is also provided with a guide rail assembly (140) on its surface. The guide rail assembly (140) is inclined along the first horizontal direction, and the first module (210) is slidably connected to the guide rail assembly (140).
10. The mold according to claim 9, characterized in that, The guide rail assembly (140) includes a first guide rail (141) and a second guide rail (142), and the two opposite sides of the first module (210) are slidably connected to the first guide rail (141) and the second guide rail (142).