Demolding structure
By introducing a demolding structure with movable blocks and rotating shafts into the mold, the problem of molds being unable to form curved pen barrels is solved, achieving an efficient and stable demolding process, protecting the curvature of the injection molded parts and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU FEIDA PEN IND
- Filing Date
- 2025-05-07
- Publication Date
- 2026-04-17
AI Technical Summary
In existing technologies, it is difficult to mold a curved pen barrel in one injection, resulting in a cumbersome and inefficient production process.
The demolding structure adopts a movable block and a rotating shaft. The movable block drives the rotating shaft through the guide hole and the new arc block to rotate and cooperate, reducing the extrusion on the injection molded part. Combined with the limiting and elastic structure, the rotating shaft is stabilized, realizing the molding of pen barrels with different curvatures.
This technology protects the curvature integrity of injection molded parts during demolding, improving production efficiency and stability. It also enables the production of pen barrels with different curvatures, utilizing a rotating shaft that enhances stability and flexibility.
Smart Images
Figure CN224130367U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of molds, and in particular to a demolding structure. Background Technology
[0002] In daily life, many products require injection molding, especially in the pen barrel industry. Manufacturers need to produce pen barrels of different shapes. When making some pen barrels, the outer surface of the pen barrel may have a curvature. Manufacturers often first injection mold it into a simple shape and then process it to obtain the ideal curvature.
[0003] In related technologies, the demolding structure includes a mold, on which a moving rod and a drive assembly are provided, and the drive assembly is used to drive the moving rod to move.
[0004] When manufacturers need to produce pen barrels with curves, the moving rod usually moves in a straight line, making it difficult to process curved surfaces. Manufacturers cannot injection mold curved pen barrels in one go; they need to injection mold first and then cut, which makes the production process more complicated and reduces production efficiency. Utility Model Content
[0005] To improve the limitations of shape on the demolding of injection molded parts, this application provides a demolding structure.
[0006] This application provides a demolding structure, which adopts the following technical solution:
[0007] A demolding structure includes a mold, a movable rod and a drive assembly on the mold, the drive assembly driving the movable rod to move, a movable block on the movable rod, one end of the movable block inserted into the mold being configured as a curved head, the width of the head being less than the width of the movable block near the movable rod end, the movable block being used for demolding of injection molded parts, a guide hole being formed on the movable rod, the guide hole extending along the direction of the curved head, a rotating shaft being rotatably connected to the movable block, the rotating shaft slidingly engaging with the guide hole; when the movable block disengages from the mold, the rotating shaft drives the movable block to rotate along the direction of the curved head extension from the head to the direction of the movable block near the movable rod.
[0008] By adopting the above technical solution, when the movable block is removed from the mold, the moving rod moves in the direction of removal from the mold. The wall of the guide hole abuts against the rotating shaft and drives the rotating shaft to move. The rotating shaft drives the movable block to rotate along the direction of the head curvature extension, from the head to the movable block near the moving rod, so that the movable block can be removed from the mold. This reduces the possibility of the head squeezing the injection molded part during the removal process, so that the demolding structure will not damage the injection molded part during demolding, thus protecting the integrity of the curvature of the injection molded part.
[0009] Optionally, the movable block is provided with a receiving groove for inserting a moving rod, and a first inclined surface is provided on the groove wall. When the movable block is located inside the mold, the distance from the first inclined surface to the moving rod gradually increases along the direction in which the moving rod leaves the mold. When the first inclined surface abuts against the moving rod, the movable block is pre-fixed on the moving rod.
[0010] By adopting the above technical solution, when the movable block is inserted into the mold by the moving rod, the movable block is pre-fixed on the moving rod by the first inclined surface abutting against the moving rod, so that the movable block approaches the mold in a fixed direction and the movable block will not swing randomly, thereby realizing the movable block being inserted into the mold by the moving rod.
[0011] Optionally, the rotating shaft is provided with an elastic protrusion for fixing the rotating shaft. The groove wall of the receiving groove is provided with a groove for the protrusion to be inserted. The groove wall of the receiving groove is provided with a limiting groove for the rotating shaft to be inserted. The movable block is provided with a through hole for the rotating shaft to pass through. The through hole is aligned with the limiting groove. When the protrusion is inserted into the groove, the rotating shaft is inserted into the limiting groove, and the protrusion deforms.
[0012] By adopting the above technical solution, when the protrusion is inserted into the groove, the protrusion is elastic and deforms, thus fixing the shaft. At this time, the shaft is inserted into the limiting groove, which restricts the shaft from detaching. This allows people to fix the shaft, thereby realizing the disassembly and installation of the shaft. When different models of pen barrels require different sizes of curvature, people can completely pull the shaft out of the limiting groove and replace it with a different model of movable block, so that the mold can injection mold pen barrels with different curvatures.
[0013] Optionally, a movable block is slidably connected to the movable block, and a fixed groove is provided on the movable block. The fixed groove penetrates the surface of the movable block, and the rotating shaft enters the fixed groove through the through direction. A spring is provided on the fixed groove, and the spring drives the fixed block to be located on the moving path of the rotating shaft leaving the fixed groove. The spring is provided with a fixed block. When the spring is compressed towards the bottom wall of the fixed groove, the rotating shaft can pass through the fixed block. When one end of the rotating shaft is inserted into the limiting groove, the other end of the rotating shaft is located between the surface of the fixed groove away from the through-moving block and the fixed block.
[0014] By adopting the above technical solution, when one end of the rotating shaft is inserted into the limiting groove, people slide the moving block, and the other end of the rotating shaft enters the fixed groove through the through direction. The rotating shaft passes through the fixed block, and at this time the rotating shaft is located between the surface of the fixed groove away from the through moving block and the fixed block. The fixed block is driven by the spring to be located on the moving path of the rotating shaft leaving the fixed groove, so that the rotating shaft is fixed in the fixed groove. The rotating shaft will not leave the fixed groove with the rotation of the moving block, making the demolding structure more stable and firm.
[0015] Optionally, the movable block is provided with an elastic limiting block, which is located on the moving path of the movable block. When the movable block abuts against the limiting block, the movable block does not block the through hole.
[0016] By adopting the above technical solution, the limiting block is located on the moving path of the moving block, so that the limiting block prevents the moving block from moving in the direction of blocking the through hole. When the moving block abuts the limiting block, the moving block is blocked by the limiting block and will not move arbitrarily, thus maintaining the state of the unblocked through hole, making it convenient for people to take out the shaft.
[0017] Optionally, a second inclined surface is provided on the fixing block. The distance from the second inclined surface to the surface of the fixing groove away from the side of the moving block gradually increases along the direction from the fixing block to the spring. The second inclined surface is located on the moving path of the rotating shaft inserted into the fixing groove.
[0018] By adopting the above technical solution, the distance from the second inclined surface to the surface of the fixed groove away from the side of the moving block gradually increases along the direction from the fixed block to the spring, and the second inclined surface is located on the moving path of the rotating shaft inserting into the fixed groove. When people slide the moving block, when the rotating shaft abuts the fixed block, the rotating shaft can drive the fixed block to move towards the spring, so that the rotating shaft passes through the fixed block more smoothly along the direction of the second inclined surface.
[0019] Optionally, the movable block is provided with an elastic spring block, which is used to drive the fixed block to move toward the direction of the spring. When the spring block drives the fixed block to move toward the direction of the spring, the fixed block moves through the pivot.
[0020] By adopting the above technical solution, the elasticity of the spring block allows it to stretch and deform. People can directly press the spring block against the second inclined surface on the fixed block, thereby driving the fixed block to move towards the spring and causing the rotating shaft to disengage from the fixed groove. People do not need to press the smaller fixed block by hand, which provides convenience for operation.
[0021] Optionally, the spring block is provided with an elastic locking block, and the fixing block is provided with a locking slot for the locking block to be inserted. When the locking block is inserted into the locking slot, the spring block restricts the fixing block from moving towards the direction of the spring.
[0022] By adopting the above technical solution, the movement of the moving block will cause the spring to shake. When the card block is inserted into the card slot, the spring block will generate a force along the direction of the spring towards the fixed block due to deformation. The spring block restricts the fixed block from moving towards the spring, so that the fixed block is fixed and the fixed block is reduced from moving due to the shaking of the spring. This reduces the possibility of the rotating shaft coming out of the fixed slot, and the fixed slot can better fix the rotating shaft.
[0023] In summary, this application includes at least one of the following beneficial technical effects:
[0024] 1. When the movable block detaches from the mold, the moving rod moves in the direction of detachment from the mold. The wall of the guide hole abuts against the rotating shaft and drives the rotating shaft to move. The rotating shaft drives the movable block to rotate along the direction of the head curvature extension, from the head to the movable block near the moving rod. This allows the movable block to detach from the mold, reducing the possibility of the head squeezing the injection molded part during the process of detaching from the mold. This ensures that the demolding structure will not damage the injection molded part during demolding, thus protecting the integrity of the curvature of the injection molded part.
[0025] 2. When one end of the rotating shaft is inserted into the limiting groove, people slide the moving block, and the other end of the rotating shaft enters the fixed groove through the through direction. The rotating shaft passes through the fixed block. At this time, the rotating shaft is located between the surface of the fixed groove away from the through moving block and the fixed block. The fixed block is driven by the spring to be located on the moving path of the rotating shaft leaving the fixed groove, so that the rotating shaft is fixed in the fixed groove. The rotating shaft will not leave the fixed groove with the rotation of the moving block, making the demolding structure more stable and firm. Attached Figure Description
[0026] Figure 1 This is a structural schematic diagram of Example 1;
[0027] Figure 2 It is along in Example 1 Figure 1 A partial cross-sectional view of line AA in the middle;
[0028] Figure 3 This is a partial structural schematic diagram of Example 2;
[0029] Figure 4 It is along in Example 2 Figure 3 A partial cross-sectional view of the middle BB line;
[0030] Figure 5 This is an enlarged schematic diagram of part C in Example 2.
[0031] Reference numerals: 1. Mold; 11. Moving rod; 111. Guide hole; 12. Drive assembly; 2. Movable block; 21. Head; 22. Receiving groove; 221. First inclined surface; 222. Limiting groove; 23. Rotating shaft; 231. Protrusion; 24. Through hole; 25. Limiting block; 26. Spring block; 261. Locking block; 27. Groove; 3. Moving block; 31. Fixing groove; 311. Placement groove; 32. Spring; 33. Fixing block; 331. Second inclined surface; 332. Locking groove. Detailed Implementation
[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.
[0033] Example 1
[0034] This embodiment discloses a demolding structure. (Refer to...) Figure 1 and Figure 2 A demolding structure includes a mold 1, on which a movable rod 11 and a drive assembly 12 are fixedly connected. The drive assembly 12 includes a hydraulic cylinder for driving the movable rod 11 to move linearly toward or away from the mold 1. A movable block 2 for demolding the injection molded part is rotatably connected to the movable rod 11. One end of the movable block 2 that inserts into the mold 1 is configured as a curved head 21. The outer surface of the head 21 near the drive assembly 12 is curved, and the width of the head 21 is smaller than the width of the end of the movable block 2 near the drive assembly 12. A guide hole 111 is provided at one end of the movable rod 11. The guide hole 111 is inclined along the curvature of the head 21 and is a straight line.
[0035] Reference Figure 1 and Figure 2 The movable block 2 has a receiving groove 22 on its surface near the drive assembly 12 for inserting the moving rod 11. A first inclined surface 221 is formed on the groove wall of the receiving groove 22 away from the drive assembly 12. The distance from the first inclined surface 221 to the moving rod 11 gradually increases along the direction of the movable block 2 towards the drive assembly 12.
[0036] Reference Figure 1 and Figure 2 A rotating shaft 23 is rotatably connected inside the receiving groove 22. The wall of the guide hole 111 abuts against the rotating shaft 23, and the rotating shaft 23 slides into the guide hole 111. When the movable block 2 is disengaged from the mold 1, the rotating shaft 23 drives the movable block 2 to rotate along the arc extension direction of the head 21 from the head 21 to the direction where the movable block 2 is close to the moving rod 11, until the first inclined surface 221 abuts against the moving rod 11.
[0037] The implementation principle of Example 1 is as follows: After the injection molded part is formed, the hydraulic cylinder drives the moving rod 11 to move away from the mold 1. The hole wall of the guide hole 111 abuts against the rotating shaft 23 and drives the rotating shaft 23 to move. The rotating shaft 23 drives the movable block 2 to rotate along the arc extension direction of the head 21 from the head 21 to the movable block 2 near the moving rod 11. The movable block 2 disengages from the mold 1.
[0038] Example 2
[0039] Reference Figure 3 and Figure 4The difference between this embodiment and Embodiment 1 is that an elastic protrusion 231 is fixedly connected to the outer surface of the rotating shaft 23, and the protrusion 231 is used to fix the rotating shaft 23. A limiting groove 222 for inserting the rotating shaft 23 is provided on the groove wall of the receiving groove 22. A through hole 24 for the rotating shaft 23 to pass through is provided on the surface of the movable block 2. The through hole 24 is aligned with the limiting groove 222, and the length of the rotating shaft 23 is greater than the distance from the through hole 24 to the bottom wall of the limiting groove 222. When one end of the rotating shaft 23 passes through the through hole 24 and the receiving groove 22 and is inserted into the limiting groove 222, the other end of the rotating shaft 23 protrudes from the movable block 2. A groove 27 for inserting the protrusion 231 is provided on the groove wall of the limiting groove 222. When the protrusion 231 is inserted into the groove 27, the rotating shaft 23 passes through the through hole 24 and is inserted into the limiting groove 222, and the protrusion 231 deforms, thus fixing the rotating shaft 23 in the limiting groove 222.
[0040] Reference Figure 4 and Figure 5 A movable block 3 is slidably connected to the surface of the movable block 2 with the through hole 24. A fixing groove 31 is formed on the surface of the movable block 3 that abuts against the movable block 2, and the fixing groove 31 penetrates the surface of the movable block 3. When the movable block 3 slides toward the position of blocking the through hole 24, the rotating shaft 23 enters the fixing groove 31 through the fixing groove 31. A placement groove 311 is formed on the bottom wall of the fixing groove 31, and a spring 32 is fixedly connected to the bottom wall of the placement groove 311. A fixing block 33 is fixedly connected to the spring 32.
[0041] Reference Figure 4 and Figure 5 When the spring 32 is not under stress, the surface of the fixed block 33 away from the spring 32 abuts against the movable block 2. When the spring 32 is compressed towards the bottom wall of the fixed groove 31, the fixed block 33 is not on the moving path of the rotating shaft 23 disengaging from the fixed groove 31, and the user can slide the movable block 3, allowing the movable block 3 to disengage from the rotating shaft 23. When one end of the rotating shaft 23 is inserted into the limiting groove 222, the other end of the rotating shaft 23 is located between the surface of the fixed groove 31 away from the side penetrating the movable block 3 and the fixed block 33.
[0042] Reference Figure 3 and Figure 5 A limiting block 25 is fixedly connected to the surface of the movable block 2 with a through hole 24. The limiting block 25 is elastic and is located on the moving path of the movable block 3. When the movable block 3 abuts against the limiting block 25, the movable block 3 does not block the through hole 24.
[0043] Reference Figure 5 A second inclined surface 331 is provided on the surface of the fixed block 33 near the movable block 2. The distance from the second inclined surface 331 to the surface of the fixed groove 31 away from the side of the movable block 3 gradually increases along the direction from the fixed block 33 to the spring 32. The second inclined surface 331 is located on the moving path of the rotating shaft 23 to the fixed groove 31.
[0044] Reference Figure 5 A spring block 26 with elasticity is fixedly connected to the surface of the movable block 2 where the through hole 24 is provided. The spring block 26 includes a long strip and a short strip. The long strip is fixedly connected to the surface of the movable block 2, and the short strip is fixedly connected to the surface of the long strip near the fixed block 33. The spring block 26 is used to drive the fixed block 33 to move towards the spring 32. When the user presses the spring block 26, the spring block 26 drives the fixed block 33 to move towards the spring 32 through the second inclined surface 331, so that the rotating shaft 23 does not restrict the movement of the fixed block 33, so that the user can pull the movable block 3 to unlock the rotating shaft 23.
[0045] Reference Figure 5 A short strip is fixedly connected to a flexible locking block 261 on the surface near the movable block 2. A slot 332 for the locking block 261 to be inserted is provided on the surface of the fixed block 33 near the spring 32. When the locking block 261 is inserted into the slot 332, the elastic block 26 generates a force along the direction of the spring 32 near the fixed block 33 due to deformation. The elastic block 26 restricts the fixed block 33 from moving in the direction of the spring 32.
[0046] The implementation principle of Example 2 is as follows: The user inserts the end of the rotating shaft 23 with the protrusion 231 through the through hole 24 and the guide hole 111 into the limiting groove 222. At this time, the protrusion 231 is inserted into the groove 27. The user slides the moving block 3, and the rotating shaft 23 drives the fixing block 33 to move towards the spring 32 through the second inclined surface 331, so that the rotating shaft 23 passes through the fixing block 33. Then the spring 32 returns to its original position, and the rotating shaft 23 is located between the surface of the fixing groove 31 away from the side that passes through the moving block 3 and the fixing block 33. The user pulls the spring block 26 so that the locking block 261 is inserted into the locking groove 332, and the installation of the rotating shaft 23 is completed.
[0047] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0048] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of this application should be included within the protection scope of this application.
Claims
1. A demolding structure, comprising a mold (1), wherein the mold (1) is provided with a movable rod (11) and a driving assembly (12), the driving assembly (12) being used to drive the movable rod (11) to move, characterized in that: The movable rod (11) is provided with a movable block (2). The end of the movable block (2) that is inserted into the mold (1) is set as a head (21) with an arc. The width of the head (21) is smaller than the width of the movable block (2) near the movable rod (11). The movable block (2) is used for demolding of the injection molded part. The movable rod (11) is provided with a guide hole (111). The guide hole (111) extends along the arc of the head (21). The movable block (2) is rotatably connected with a rotating shaft (23). The rotating shaft (23) slides with the guide hole (111). When the movable block (2) is removed from the mold (1), the rotating shaft (23) drives the movable block (2) to rotate along the arc of the head (21) from the head (21) to the movable block (2) near the movable rod (11).
2. A release structure according to claim 1, wherein: The movable block (2) is provided with a receiving groove (22) for inserting the moving rod (11). The groove wall of the receiving groove (22) is provided with a first inclined surface (221). When the movable block (2) is located in the mold (1), the distance from the first inclined surface (221) to the moving rod (11) gradually increases along the direction in which the moving rod (11) leaves the mold (1). When the first inclined surface (221) abuts against the moving rod (11), the movable block (2) is pre-fixed on the moving rod (11).
3. A release structure according to claim 2, wherein: The rotating shaft (23) is provided with an elastic protrusion (231) for fixing the rotating shaft (23). The groove wall of the receiving groove (22) is provided with a groove (27) for inserting the protrusion (231). The groove wall of the receiving groove (22) is provided with a limiting groove (222) for inserting the rotating shaft (23). The movable block (2) is provided with a through hole (24) for the rotating shaft (23) to pass through. The through hole (24) is aligned with the limiting groove (222). When the protrusion (231) is inserted into the groove (27), the rotating shaft (23) is inserted into the limiting groove (222), and the protrusion (231) deforms.
4. A release structure according to claim 3, wherein: A movable block (3) is slidably connected to the movable block (2). A fixed groove (31) is provided on the movable block (3). The fixed groove (31) penetrates the surface of the movable block (3). The rotating shaft (23) enters the fixed groove (31) through the through direction. A spring (32) is provided on the fixed groove (31). The spring (32) drives the fixed block (33) to be located on the moving path of the rotating shaft (23) leaving the fixed groove (31). The spring (32) is provided with the fixed block (33). When the spring (32) is compressed towards the bottom wall of the fixed groove (31), the rotating shaft (23) can pass through the fixed block (33). When one end of the rotating shaft (23) is inserted into the limiting groove (222), the other end of the rotating shaft (23) is located between the surface of the fixed groove (31) away from the through movable block (3) and the fixed block (33).
5. A release structure according to claim 4, wherein: The movable block (2) is provided with an elastic limiting block (25), which is located on the moving path of the movable block (3). When the movable block (3) abuts against the limiting block (25), the movable block (3) does not block the through hole (24).
6. A release structure according to claim 4, wherein: The fixed block (33) has a second inclined surface (331). The distance between the second inclined surface (331) and the surface of the fixed groove (31) away from the side of the moving block (3) gradually increases along the direction from the fixed block (33) to the spring (32). The second inclined surface (331) is located on the moving path of the rotating shaft (23) inserted into the fixed groove (31).
7. A release structure according to claim 6, wherein: The movable block (2) is provided with an elastic spring block (26), which is used to drive the fixed block (33) to move toward the spring (32). When the spring block (26) drives the fixed block (33) to move toward the spring (32), the fixed block (33) moves through the pivot (23).
8. A release structure according to claim 7, wherein: The spring block (26) is provided with an elastic locking block (261), and the fixing block (33) is provided with a slot (332) for the locking block (261) to be inserted. When the locking block (261) is inserted into the slot (332), the spring block (26) restricts the fixing block (33) from moving towards the spring (32).