Demoulding mechanism

Abstract

The utility model provides a demolding mechanism. The demolding mechanism comprises a fixed insert, a movable insert and a demolding rod, the movable insert is movably sleeved on the demolding rod; the movable insert and the end face of the upper end of the demolding rod are similar to the bottom face of a product in shape, and the peripheral side face of the upper end of the movable insert is matched with an inverted buckle on the inner side of the product. The movable insert is sleeved with the fixed insert, and the inner circumferential side face of the upper end of the fixed insert is matched with the outer side of a product; the movable insert and the demolding rod can synchronously perform axial first demolding action relative to the fixed insert; and the demolding rod can perform axial second demolding action relative to the movable insert. According to the demolding mechanism, the movable insert and the demolding rod synchronously perform the first axial demolding action relative to the fixed insert, so that a product is separated from the fixed insert; and the demolding rod performs axial second demolding action relative to the movable insert, so that the product is separated from the movable insert, smooth demolding of the product is realized, and the inner inverted buckle is prevented from being pressed and damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of demoulding, in particular to a demoulding method suitable for the molding process of products with inner undercuts. Background Art

[0002] Products with internal undercuts refer to products with raised structures on their inner side walls, which play certain roles, such as limiting, locking, and fitting. One of the methods for producing such products with internal undercuts is through compression molding. However, the compression molding method has the problem of inconvenience in demoulding. That is, during demoulding, due to the interference between the formed internal undercut and the mold, forced demoulding may cause the internal undercut to be damaged by pressure, which may lead to the scrapping of the product. Therefore, it is necessary to propose further solutions to the above problems. Utility Model Content

[0003] The purpose of the utility model is to provide a demoulding mechanism to overcome the deficiencies in the prior art.

[0004] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a demoulding mechanism, which is used for demoulding products with internal undercuts. The demoulding mechanism includes: a fixed insert, a movable insert and a demoulding rod;

[0005] The movable insert is movably mounted on the demoulding rod; the end faces of the movable insert and the upper ends of the demoulding rod are similar in shape to the bottom surface of the product, and the outer peripheral side surface of the upper end of the movable insert cooperates with the undercut on the inner side of the product; the fixed insert is mounted on the movable insert, and the inner peripheral side surface of the upper end of the fixed insert cooperates with the outer side of the product; the movable insert and the demoulding rod can synchronously perform the first axial demoulding action relative to the fixed insert; the demoulding rod can perform the second axial demoulding action relative to the movable insert.

[0006] As an improvement to the demoulding mechanism of the present invention, the end surface of the upper end of the demoulding rod is a plane, and the center position of the plane has a concave surface; the end surface of the upper end of the movable insert is a concave arc surface.

[0007] As an improvement to the demoulding mechanism of the present invention, the outer peripheral side surface of the upper end of the demoulding rod is provided with a protruding shape.

[0008] As an improvement to the demoulding mechanism of the present invention, the protruding portion at the upper end of the demoulding rod is trumpet-shaped.

[0009] As an improvement to the demoulding mechanism of the present invention, a guide sleeve is further provided between the movable insert and the demoulding rod.

[0010] As an improvement to the demoulding mechanism of the present invention, the outer peripheral side surface of the lower end of the movable insert is convexly arranged, and there is initially a distance between the convex portion of the lower end and the fixed insert.

[0011] Compared with the prior art, the beneficial effects of the present invention are: in the demoulding mechanism of the present invention, the movable insert and the demoulding rod synchronously perform the first axial demoulding action relative to the fixed insert, so that the product is separated from the fixed insert; the demoulding rod performs the second axial demoulding action relative to the movable insert, so as to achieve smooth demoulding of the product and avoid damage to the internal undercut due to pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is a cross-sectional view of an embodiment of the demoulding mechanism of the present invention;

[0014] Figure 2 for Figure 1 A magnified schematic diagram of part A in the middle;

[0015] Figure 3 for Figure 1 Enlarged schematic diagram of part B in the middle. DETAILED DESCRIPTION

[0016] The present invention is described in detail below in conjunction with various embodiments, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in this field based on these embodiments are all within the scope of protection of the present invention.

[0017] The utility model provides a demoulding mechanism, which is used for demoulding products with inner undercuts. The demoulding mechanism comprises: a fixed insert, a movable insert and a demoulding rod;

[0018] The movable insert is movably mounted on the demoulding rod; the end faces of the movable insert and the upper end of the demoulding rod are similar in shape to the bottom surface of the product, and the outer peripheral side surface of the upper end of the movable insert matches the undercut on the inner side of the product; the fixed insert is mounted on the movable insert, and the inner peripheral side surface of the upper end of the fixed insert matches the outer side of the product; the movable insert and the demoulding rod can synchronously perform the first axial demoulding action relative to the fixed insert; the demoulding rod can perform the second axial demoulding action relative to the movable insert.

[0019] The process of the present invention is described below with reference to specific embodiments. Figures 1 to 3 As shown, the demoulding mechanism of this embodiment is used for demoulding a product 100 with an internal undercut 101, and includes: a fixed insert 10, a movable insert 20, and a demoulding rod 30. Among them, the movable insert 20 is movably mounted on the demoulding rod 30. In this way, the demoulding rod 30 can move axially relative to the movable insert 20. In order to have a larger effective area, the outer peripheral side surface of the upper end of the demoulding rod 30 is convex. In one embodiment, the protruding portion 31 of the upper end of the demoulding rod 30 is trumpet-shaped. In this way, the demoulding rod 30 has a larger end effective area. In addition, in order to ensure a coaxial arrangement, a guide sleeve 40 is also provided between the movable insert 20 and the demoulding rod 30.

[0020] To meet the requirements of compression molding, the upper end faces of the movable insert 20 and the ejector pin 30 are contoured to the bottom surface of the product. The outer side surface of the upper end of the movable insert 20 mates with the undercut on the inner side of the product. In one embodiment, the upper end face of the ejector pin 30 is a flat surface 32 with a concave surface 33 at its center. The center of the concave surface 33 is coaxial with the axis of the ejector pin 30. The upper end face of the movable insert 20 is a concave arcuate surface 21. Furthermore, a smooth transition is formed between the upper end faces of the movable insert 20 and the upper end faces of the ejector pin 30.

[0021] The fixed insert 10 is sleeved onto the movable insert 20. The movable insert 20 and the demolding rod 30 are capable of axial movement relative to the fixed insert 10. The inner circumference of the upper end of the fixed insert 10 mates with the outer side of the product. As a result, due to the radial restriction of the fixed insert 10, the inner undercut on the product interferes with the movable insert 20 during demolding.

[0022] To address this issue, the movable insert 20 and the demolding rod 30 can simultaneously perform a first axial demolding motion relative to the fixed insert 10; the demolding rod 30 can also perform a second axial demolding motion relative to the movable insert 20. Thus, the movable insert 20 and the demolding rod 30 simultaneously perform a first axial demolding motion relative to the fixed insert 10, separating the product from the fixed insert 10; and the demolding rod 30 performs a second axial demolding motion relative to the movable insert 20, separating the product from the movable insert 20. This ensures smooth demolding of the product and prevents damage to the internal undercut from pressure.

[0023] Furthermore, to limit the first demolding movement of the movable insert 20 and the demolding rod 30, a protruding portion 22 is provided on the outer peripheral side of the lower end of the movable insert 20. Initially, a distance 23 is provided between the protruding portion 22 and the fixed insert 10. Thus, the distance 23 constitutes the travel range of the first demolding movement.

[0024] To sum up, in the demoulding mechanism of the present invention, the movable insert and the demoulding rod synchronously perform the first axial demoulding action relative to the fixed insert, so that the product is separated from the fixed insert; the demoulding rod performs the second axial demoulding action relative to the movable insert, so as to achieve smooth demoulding of the product and avoid pressure damage to the internal undercut.

[0025] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

[0026] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A demoulding mechanism, characterized in that: The demoulding mechanism is used for demoulding products with inner undercuts, and the demoulding mechanism comprises: a fixed insert, a movable insert and a demoulding rod; The movable insert is movably mounted on the demoulding rod; the end faces of the movable insert and the upper ends of the demoulding rod are similar to the bottom surface of the product, and the outer peripheral side surface of the upper end of the movable insert cooperates with the undercut on the inner side of the product; the fixed insert is mounted on the movable insert, and the inner peripheral side surface of the upper end of the fixed insert cooperates with the outer side of the product; the movable insert and the demoulding rod can synchronously perform the first axial demoulding action relative to the fixed insert; the demoulding rod can perform the second axial demoulding action relative to the movable insert.

2. The demoulding mechanism according to claim 1, characterized in that: The end surface of the upper end of the demoulding rod is a plane, and the center position of the plane has a concave surface; the end surface of the upper end of the movable insert is a concave arc surface.

3. The demoulding mechanism according to claim 1, characterized in that: The outer peripheral side surface of the upper end of the demoulding rod is convexly arranged.

4. The demoulding mechanism according to claim 3, characterized in that: The protruding portion at the upper end of the demoulding rod is trumpet-shaped.

5. The demoulding mechanism according to claim 1, characterized in that: A guide sleeve is also arranged between the movable insert and the demoulding rod.

6. The demoulding mechanism according to claim 1, characterized in that: The outer peripheral side surface of the lower end of the movable insert is convexly arranged, and there is a distance between the convex part of the lower end and the fixed insert initially.

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