Rear mold cavity forced demolding structure of injection mold
The strong ejection structure on the mold cavity addresses the issue of mold separation damage by using inwardly recessed grooves on the mold core to ensure precise and efficient cap production.
Patent Information
- Application Number
- CN202422055188.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-23
AI Technical Summary
During the injection molding process, the front mold is easily stuck when the cover body is separated from the front mold, which leads to damage and affects the production accuracy. Especially when the cover body and the front mold have a large and smooth contact range, it is difficult to effectively avoid this problem in conventional mold release methods.
A strong dislocation is formed in the smooth surface of the mold kernel. Combined with the thrust hole design, it ensures that the cover body and the mold kernel are not separated by the front mold when separated, and the separation between the cover body and the mold kernel is restricted through strong dislocation.
It effectively prevents damage to the cover body when the mold kernel is separated from the front mold, and improves the production accuracy and production efficiency of the injection molded cover body.
Smart Images
Figure CN223099822U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technology in the field of molds, especially to a strong ejection structure for the rear mold cavity of an injection mold. Background Art
[0002] The strong ejection structure for the rear mold cavity of an injection mold refers to a forced demolding measure taken to enable plastic products to be smoothly ejected from the mold during the injection molding process.
[0003] Due to injection pressure or local feature factors, the product adheres to the front mold during the production process, affecting production efficiency. The conventional methods are full-cavity polishing / applying release agent or welding to make undercuts, etc. However, when the product made by the injection mold is a cover body, since the contact range between the cover body and the front mold is large and the skirt of the cover body is relatively smooth, when the front mold and the rear mold are separated, due to the lack of limit between the mold core and the cover body, at this time, as the front mold moves away from the rear mold, the cover body will separate from the mold core due to adhering to the front mold, and this separation is likely to cause damage to the cover body and affect the manufacturing precision of the injection cover body. Summary of the Utility Model
[0004] In view of this, aiming at the deficiencies existing in the prior art, the main purpose of the present utility model is to provide a strong ejection structure for the rear mold cavity of an injection mold, which solves the problem that when the front mold and the rear mold are separated, due to the lack of limit between the mold core and the cover body, at this time, as the front mold moves away from the rear mold, the cover body will separate from the mold core due to adhering to the front mold, and this separation is likely to cause damage to the cover body and affect the manufacturing precision of the injection cover body.
[0005] To achieve the above purpose, the present utility model adopts the following technical solution: A strong ejection structure for the rear mold cavity of an injection mold is used to mold a cover body, and the cover body includes a skirt; the strong ejection structure for the rear mold cavity includes a rear mold and a protruding mold core arranged on the rear mold. The side edge of the mold core has a smooth surface adapted to the inner wall of the skirt, and a strong ejection position for preventing the cover body from being carried out by the front mold when demolding is concave on the smooth surface.
[0006] Further, the depth of the strong ejection position is 0.06 mm.
[0007] Further, the mold core is disc-shaped, and the shape of the cover body is the same as that of the mold core.
[0008] Further, the strong ejection positions are arranged around the side edge of the mold core in a head-to-tail connection.
[0009] Further, the strong ejection positions are in a line segment shape and are arranged around the side edge of the mold core at intervals.
[0010] Further, the strong ejection positions are in a linear shape, and there are no less than two strong ejection positions, which are oppositely arranged on the side edge of the mold core.
[0011] Further, the strong ejection positions are in a corrugated line segment shape and are arranged around the side edge of the mold core at equal intervals.
[0012] Furthermore, an ejector hole is provided on the mold core, and one end of the ejector hole passes through the rear mold.
[0013] Furthermore, the strong dislocation is wide outside and narrow inside, and the two opposite walls of the strong dislocation are smooth arc surfaces.
[0014] Furthermore, the skirt portion extends into the strong dislocation and is adapted to the smooth curved surface.
[0015] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that by opening an inwardly concave strong dislocation on the smooth surface of the mold core, after the rear mold and the front mold are closed, the product is formed on the mold core and connected with the strong dislocation, so that when the rear mold and the front mold are separated, the product will not be separated from the mold core due to the separation of the front mold and the rear mold.
[0016] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a three-dimensional diagram of embodiment 1 of the present utility model.
[0018] Figure 2 It is a three-dimensional diagram of the mold core of Example 1 of the present utility model.
[0019] Figure 3 It is a three-dimensional diagram of the mold core of Example 1 of the present utility model.
[0020] Figure 4 It is a three-dimensional diagram of the mold core of Example 1 of the present utility model.
[0021] Figure 5 It is a three-dimensional diagram of the mold core of Example 1 of the present utility model.
[0022] Figure 6 It is embodiment 1 of the utility model Figure 1 Enlarged view of point A.
[0023] Description of the accompanying drawings:
[0024] 10 rear mold, 20 mold core, 21 smooth surface, 22 strong dislocation, 221 smooth arc surface, 23 ejector hole, 30 cover body, 31 skirt. DETAILED DESCRIPTION
[0025] Please refer to Figures 1-6As shown, it shows the specific structure of the first preferred embodiment of the present utility model, which is a strong ejection structure for the rear mold cavity of an injection mold for molding the cover body 30. The cover body 30 includes a skirt 31. The strong ejection structure for the rear mold cavity includes a rear mold 10 and a protruding mold core 20 provided on the rear mold 10. The side edge of the mold core 20 has a smooth surface 21 adapted to the inner wall of the skirt 31, and a strong ejection position 22 is concavely formed on the smooth surface 21 to prevent the cover body 30 from being carried out by the front mold when demolding. When the mold core 20 on the rear mold is disc-shaped, after the front mold and the rear mold 10 are clamped, the cover body 30 formed by the shape of the mold core 20 fits with the mold core 20. When the front mold and the rear mold 10 are separated, in order to facilitate the separation of the cover body 30 and the mold core 20, a smooth surface 21 is provided on the mold core 20, and the inner wall of the cover body 30 corresponds to the mold core 20 to facilitate the separation of the cover body 30 and the mold core 20.
[0026] Specifically, due to the opening of the strong ejection position 22, when the front mold and the rear mold 10 are separated, through the restriction of the strong ejection position 22 on the mold core 20, the cover body 30 will not be separated from the mold core 20 with the front mold due to sticking to the front mold.
[0027] As Figure 1 shown, exemplarily, the depth of the strong ejection position 22 is 0.06 mm. The depth of the strong ejection position 22 being 0.06 mm can not only increase the resistance during the separation between the cover body 30 and the mold core 20, but also reduce the influence on the cover body 30 caused by the strong ejection position 22.
[0028] As Figure 2 shown, exemplarily, the mold core 20 is disc-shaped, and the shape of the cover body 30 is consistent with that of the mold core 20.
[0029] As Figure 2 shown, exemplarily, the strong ejection position 22 is opened around the side edge of the mold core 20 with its head and tail connected. When the mold core 20 is disc-shaped and the strong ejection position 22 is opened around the mold core 20, due to the opening of the strong ejection position 22, the resistance during the separation between the cover body 30 and the strong ejection position 22 is greater, thereby avoiding the separation of the front mold and the rear mold 20 from driving the separation of the cover body 30 and the mold core 20.
[0030] As Figure 3 shown, exemplarily, the strong ejection position 22 is in a line segment shape and is opened around the side edge of the mold core 20 at intervals. When the strong ejection position 22 is opened in a line segment shape, the contact area between the cover body 30 and the strong ejection position 22 can be reduced, and further, due to the opening of the strong ejection position 22, the convex part on the inner wall of the mold core 20 corresponding to the strong ejection position 22 can be reduced, making the inner wall of the cover body 30 smoother.
[0031] As Figure 4 shown, exemplarily, the strong ejection position 22 is in a line shape, and there are at least two strong ejection positions 22, which are oppositely arranged on the side edge of the mold core 20. When the strong ejection position 22 is in a line shape and is oppositely arranged, the convex part of the cover body 30 corresponding to the strong ejection position 22 can be further reduced.
[0032] AsFigure 1 As shown, exemplarily, the strong disengagement 22 is in the shape of a corrugated line segment, and the strong disengagement 22 is arranged at equal intervals around the side edge of the mold core 20. When the strong disengagement 22 is in the shape of a corrugated line segment, the resistance when the cover body 30 and the strong disengagement 22 are separated can be increased.
[0033] As Figure 1 As shown, exemplarily, the mold core 20 is provided with a thimble hole 23, and one end of the thimble hole 23 penetrates through the rear mold 10. By providing the thimble hole 23, the thimble rod can penetrate out of the thimble hole 23, and then the cover body 30 on the mold core 20 is ejected, so that the cover body 30 and the mold core 20 are separated.
[0034] As Figure 1 As shown, exemplarily, the strong disengagement 22 is wider outside and narrower inside, and the two opposite walls of the strong disengagement 22 are smooth arc surfaces 221. Due to the wider outside and narrower inside of the strong disengagement 22, it is convenient for the thimble to eject the cover body 30, and the smooth arc surface 221 can further facilitate the separation of the skirt 31 on the cover plate 30 and the strong disengagement 22. The skirt 31 partially extends into the strong disengagement 22 and is adapted to the smooth arc surface 221.
[0035] In summary, the design focus of the present utility model is that by providing the strong disengagement 22 on the mold core 20, when the front mold and the rear mold 20 are separated, the mold core 20 will not be separated with the front mold and the rear mold 20, and the cover body 30 and the mold core 20 are separated.
[0036] The above is only a preferred embodiment of the present utility model, and does not impose any limitation on the technical scope of the present utility model. Therefore, any minor modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.
Claims
1. A strong ejection structure for the rear mold cavity of an injection mold for molding a cover body (30), the cover body (30) including a skirt (31); the strong ejection structure for the rear mold cavity includes a rear mold (10) and a mold core (20) protruding on the rear mold (10), characterized in that: The side edge of the mold core (20) contains a smooth surface (21) adapted to the inner wall of the skirt (31), and a strong dislocation groove (22) is formed by concave inward on the smooth surface (21) to prevent the cover body (30) from being carried out by the front mold when demolding.
2. The forced ejection structure of the rear mold cavity of an injection mold according to claim 1, characterized in that: The depth of the strong dislocation groove (22) is 0.06 mm.
3. The forced ejection structure of the rear mold cavity of an injection mold according to claim 1, characterized in that: The mold core (20) is disc-shaped, and the shape of the cover body (30) is the same as that of the mold core (20).
4. The forced ejection structure of the rear mold cavity of an injection mold according to claim 1, characterized in that: The strong dislocation groove (22) is arranged around the side edge of the mold core (20) with its head and tail connected.
5. The strong ejection structure of the rear mold cavity of an injection mold according to claim 4, characterized in that: The strong dislocation groove (22) is in a line segment shape and is arranged at intervals around the side edge of the mold core (20).
6. The strong ejection structure of the rear mold cavity of an injection mold according to claim 4, characterized in that: The strong dislocation groove (22) is in a linear shape, and there are no less than two strong dislocation grooves (22), which are oppositely arranged on the side edge of the mold core (20).
7. The strong ejection structure of the rear mold cavity of an injection mold according to claim 4, characterized in that: The strong dislocation groove (22) is in a corrugated line segment shape, and the strong dislocation grooves (22) are arranged at equal intervals around the side edge of the mold core (20).
8. The strong ejection structure of the rear mold cavity of an injection mold according to claim 1, wherein: A thimble hole (23) is provided on the mold core (20), and one end of the thimble hole (23) penetrates through the rear mold (10).
9. The strong ejection structure of the rear mold cavity of an injection mold according to claim 2, characterized in that: The strong dislocation groove (22) is wider outside and narrower inside, and the two opposite walls of the strong dislocation groove (22) are smooth arc surfaces (221).
10. The strong ejection structure of the rear mold cavity of an injection mold according to claim 9, characterized in that: Part of the skirt (31) extends into the strong dislocation groove (22) and is adapted to the smooth arc surface (221).