Die for forcibly removing inverted buckle

Abstract

The utility model discloses a die for forcibly removing an inverted buckle, which comprises a bottom plate, an ejector pin mechanism, a push plate and a plate B. A die core is arranged on the plate B. Two side surfaces of the push plate are provided with buckle position cover plates, floating inserts are movably arranged in the buckle position cover plates, and the floating inserts are connected with the side wall of the plate B. An insert corresponding to the bottom of a product in the mold core and an inverted buckling structure on the product is arranged on the push plate, the ejector pin mechanism pushes the B plate and the mold core to move upwards, a movable groove is formed in the buckling position cover plate, and the floating insert moves in the movable groove. According to the utility model, when a product is ejected through the ejector pin mechanism, the B plate is synchronously ejected, and the floating inserts movably arranged on the two sides of the B plate are limited through the buckling position cover plate, so that the movement of the B plate is limited, and then through continuous ejection of the ejector pin mechanism, the product with an inverted buckle is forcibly demolded; the demolding requirements of corresponding products are met, meanwhile, the structural size of the whole mold is reduced, and excessive occupied space is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of mold processing and production, in particular to a mold with strong release and undercut. Background Art

[0002] In existing molds, most common undercuts are removed using a sliding mechanism and a tilting ejector. The sliding mechanism is driven by inclined guide pins or hydraulic cylinders during mold opening to remove the undercut, while the tilting ejector utilizes a specific angle to eject the undercut during the ejection process. Both of these common methods place significant demands on the product's structural space, requiring ample clearance for undercut removal. However, some mold designs lack this space, resulting in thin steel sheets being used to facilitate undercut removal, impacting the overall mold lifespan.

[0003] Therefore, the existing technology has defects and needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a mold with a strong release mechanism.

[0005] The technical solution of the present utility model is as follows: a mold for forced removal of undercuts is provided, comprising: a lower mold and an upper mold that are interlocked with each other, a mold core is arranged between the interlocking surfaces of the lower mold and the upper mold, and the lower mold comprises, from bottom to top, a bottom plate, a ejector mechanism, a push plate, and a B plate, the mold core is arranged on the B plate, and buckle cover plates are arranged on both sides of the push plate, a floating insert is movably arranged in the buckle cover plate, and the floating insert is connected to the side wall of the B plate, the inserts of the product bottom and the undercut structure on the product corresponding to the mold core are arranged on the push plate, the ejector mechanism pushes the B plate and the mold core to move upward, and a movable groove is arranged in the buckle cover plate, and the floating insert moves inside the movable groove.

[0006] Furthermore, the top surface of the movable groove and the top surface of the floating insert in contact with the movable groove are both inclined surfaces.

[0007] Furthermore, the side wall of the B plate is provided with an installation slot corresponding to the floating insert, and the floating insert is embedded in the installation slot.

[0008] Furthermore, a plurality of springs are provided on a side surface of the floating insert facing the B plate.

[0009] Furthermore, a trigger rod is arranged between the buckle cover plate and the floating insert, one end of the trigger rod is fixed on the side wall of the ejector mechanism, and the other end of the trigger rod is inserted into the movable groove and arranged between the floating insert and the buckle cover plate. The top of the trigger rod is an L-shaped groove, and the bottom of the floating insert is located in the L-shaped groove.

[0010] Adopting the above scheme, the product is ejected by the ejector pin mechanism, meanwhile, the B plate is synchronously lifted up, and the floating insert movably arranged on the two sides of the B plate is limited by the buckle cover plate, so that the movement of the B plate is limited, and then the product with the undercut is strongly demolded by the continuous ejection of the ejector pin mechanism, thereby meeting the demolding requirement of the corresponding product, reducing the structural volume of the overall mold, and avoiding occupying too much space. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structural schematic view of the utility model.

[0012] Figure 2 It is a top view of the lower mold.

[0013] Figure 3 It is Figure 2 It is a sectional structure schematic view of A-A.

[0014] Figure 4 It is Figure 2 It is a sectional structure schematic view of B-B. DETAILED DESCRIPTION

[0015] The utility model will be explained in detail in combination with the drawings and specific embodiments.

[0016] Please refer to Figures 1 to 4 The utility model provides a strong demolding undercut mold, which comprises a lower mold 2 and an upper mold 1 that are buckled with each other, a mold core 241 is arranged between the buckling surfaces of the lower mold 2 and the upper mold 1, the lower mold 2 comprises a bottom plate 21, an ejector pin mechanism 22, a push plate 23 and a B plate 24 from bottom to top, the mold core 241 is arranged on the B plate 24, the push plate 23 is provided with a buckle cover plate 25 on the two sides, the buckle cover plate 25 is movably provided with a floating insert 26, the floating insert 26 is connected with the side wall of the B plate 24, the insert 231 corresponding to the product bottom and the product upper undercut structure in the mold core 241 is arranged on the push plate 23, the ejector pin mechanism 22 drives the B plate 24 and the mold core 241 to move upwards, the buckle cover plate 25 is provided with a movable slot, and the floating insert 26 moves inside the movable slot.

[0017] In the utility model, the product for injection molding production is of an opening-down structure, so as to facilitate demolding. Meanwhile, the outer side of the product is provided with a plurality of undercuts. In the prior art, the demolding of the undercut needs to adopt an inclined ejector pin to eject the undercut, which has a complex structure and occupies a large space. In the utility model, the sectional strong demolding mode meets the demolding requirement of the product with the undercut. The specific working process is as follows:

[0018] When the product's injection molding is complete and the upper and lower molds 1 and 2 are opened, the ejector mechanism 22 simultaneously lifts the product and, simultaneously, the B-plate 24, causing it to move upward a certain distance. At this point, the insert 231 on the push plate 23 gradually separates from the product. When the floating insert 26 contacts the top of the movable slot, the locking cover 25 restricts its movement, securing the B-plate 24. Simultaneously, the ejector mechanism 22 continues to eject the product. At this point, the undercut on the product moves to the top edge of the mold core 241. Because the inside of the product has separated from the insert 231, it provides some clearance for the product. When the B-plate 24 is fixed and the ejector mechanism 22 continues to eject the product, the product slightly deflects inward, allowing the undercut to separate from the mold core 241. After leaving the mold core 241, the undercut recovers due to the product's own elasticity, thus enabling the demolding of the product with the undercut.

[0019] In order to cooperate with the strong demoulding of undercut, it is necessary to reduce the cooling time during the injection molding production process, so that the product can be ejected before it is completely cooled, so as to ensure that the product can have good toughness to meet the elastic deformation for demoulding and recovery, and avoid damage to the product during the demoulding process.

[0020] In some embodiments, the top surface of the movable groove and the top surface of the floating insert 26 in contact with the movable groove are both inclined surfaces. By interfitting and squeezing the inclined surfaces, the movement of the floating insert 26 is restricted, thereby ensuring the fixing effect of the B plate 24 and the mold core 241.

[0021] In some embodiments, the sidewall of the B-plate 24 is provided with a mounting slot 242 corresponding to the floating insert 26, and the floating insert 26 is embedded in the mounting slot 242. Several springs 261 are provided on the side of the floating insert 26 facing the B-plate 24. When the top surface of the floating insert 26 contacts the top surface of the movable slot, the compression between the inclined surfaces pushes the floating insert 26 deeper into the mounting slot 242, simultaneously compressing the springs 261. The springs 261, under their elastic action, generate a reaction force, pushing the floating insert 26 toward the locking cover 25, thereby locking the floating insert 26 and effectively securing the B-plate 24.

[0022] In some embodiments, a cocking rod is positioned between the locking cover plate 25 and the floating insert 26. One end of the cocking rod is fixed to the side wall of the ejector mechanism 22, while the other end of the cocking rod penetrates the movable groove and is positioned between the floating insert 26 and the locking cover plate 25. The top of the cocking rod is an L-shaped groove, and the bottom of the floating insert 26 is located in the L-shaped groove. When the ejector mechanism 22 is lifted upward, the cocking rod moves upward with the lifting mechanism, thereby lifting the floating insert 26 through the L-shaped groove at the top of the cocking rod, thereby lifting the B plate 24 upward. When the top surface of the floating insert 26 contacts the top surface of the movable groove, the floating insert 26 will be pushed deeper into the installation groove 242 through the extrusion between the inclined surfaces, and the spring 261 will be squeezed at the same time, so that the floating insert 26 will be disengaged from the L-shaped groove at the top of the trigger rod, and then under the action of gravity, the B plate 24 will fall downward as a whole, thereby forcibly demolding the undercut on the product and ensuring the demolding effect of the product with undercut.

[0023] To sum up, the utility model ejects the product through the ejector mechanism while simultaneously lifting the B plate, and restricts the floating inserts movably arranged on both sides of the B plate through the buckle cover plate, thereby limiting the movement of the B plate, and then continuously ejects the product with the undercut through the ejector mechanism, thereby strongly demolding the product, meeting the demolding requirements of the corresponding product, reducing the structural volume of the overall mold, and avoiding excessive space occupation.

[0024] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mold for strong undercut removal, characterized in that: include: The lower mold and the upper mold are interlocked with each other, and a mold core is arranged between the interlocking surfaces of the lower mold and the upper mold. The lower mold includes, from bottom to top, a bottom plate, an ejector mechanism, a push plate, and a B plate. The mold core is arranged on the B plate, and buckle cover plates are provided on both sides of the push plate. A floating insert is movably provided in the buckle cover plate, and the floating insert is connected to the side wall of the B plate. The inserts of the product bottom and the inverted structure on the product corresponding to the mold core are arranged on the push plate. The ejector mechanism pushes the B plate and the mold core to move upward. A movable groove is provided in the buckle cover plate, and the floating insert moves inside the movable groove.

2. The mold for strong undercut removal according to claim 1, characterized in that: The top surface of the movable groove and the top surface of the floating insert in contact with the movable groove are both inclined surfaces.

3. The mold for strong undercut removal according to claim 1, characterized in that: The side wall of the B plate is provided with an installation slot corresponding to the floating insert, and the floating insert is embedded in the installation slot.

4. The mold for strong undercut removal according to claim 1, characterized in that: A plurality of springs are provided on a side of the floating insert facing the B plate.

5. The mold for strong undercut removal according to claim 1, characterized in that: A trigger rod is arranged between the buckle cover plate and the floating insert, one end of the trigger rod is fixed on the side wall of the ejector mechanism, and the other end of the trigger rod is inserted into the movable groove and arranged between the floating insert and the buckle cover plate. The top of the trigger rod is an L-shaped groove, and the bottom of the floating insert is located in the L-shaped groove.

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