CN216885048U

CN216885048U - Injection mold with fixed-distance demolding mechanism

Info

Publication number: CN216885048U
Application number: CN202123397138.4U
Authority: CN
Inventors: 谷祖兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-07-05
Anticipated expiration: 2031-12-31

Abstract

An injection mold with a fixed-distance demolding mechanism comprises a bottom plate and a sprue plate, wherein a cavity and a cavity insert are arranged on the bottom plate, a core fixing plate, a core and a core insert are arranged below the sprue plate, the core insert and the cavity insert form a mold cavity, an injection molded product and an inclined reverse buckle are arranged in the mold cavity, an air hole is formed in the core, a stripper plate is arranged outside the wall of the core, the inner parting surface of the stripper plate abuts against the bottom surface of the outermost contour of the product, lock sleeves are arranged in the outer walls of the two sides of the stripper plate, compression springs and lock blocks are arranged in the lock sleeves, the head of each lock block extends out of the lock sleeve, an inclined surface is arranged below the head of the lock sleeve, a draw hook rod is arranged on the outer wall of the corresponding cavity, the draw hook rod extends upwards to the position below the sprue plate, a draw hook is arranged at the head of the corresponding core fixing plate, a unhooking plate extends downwards to the cavity and is arranged at the position, when the mold is opened, the draw hook is matched with the upper surface of the locking block, and when the mold is reset, the unhook is matched with the inclined plane.

Description

Injection mold with fixed-distance demolding mechanism

Technical Field

The utility model relates to an injection mold with a fixed-distance demolding mechanism, and belongs to the field of injection molds.

Background

The injection mold is adopted to produce plastic products, such as plastic barrel covers and the like, the inner side of the products is provided with the inclined reverse buckle, and when the products are molded and demoulded, the inclined reverse buckle cannot be directly released. The traditional mold adopts an inclined ejection structure, after the mold is opened, an ejection mechanism drives an inclined ejector rod, the inclined ejector rod drives an inclined inverted buckle insert to be separated from an inclined inverted buckle, then the mold opening is continued, so that a product demolding core is formed, and finally, a worker or a mechanical arm takes away the product. However, in actual production, the inclined ejector structure has poor motion stability and is easy to interfere with other internal structures of the die, and the inclined ejector rod is easy to deform and break, so that shutdown maintenance is caused, and the production efficiency is influenced.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides the injection mold with the fixed-distance demolding mechanism, which adopts a mechanical drag hook and a fixed-distance unhooking structure, realizes fixed-distance demolding, has stable and reliable action and improves the production efficiency.

The utility model discloses an injection mold with a fixed-distance demolding mechanism, which adopts the technical scheme that: the device is characterized by comprising a bottom plate and a sprue plate, wherein a cavity is arranged on the bottom plate, a cavity insert is arranged in the cavity, a sprue ferrule is arranged in the sprue plate, a core fixing plate is arranged below the sprue plate, a core is arranged below the core fixing plate, a core insert is arranged below the core, the core insert and the cavity insert are matched to form a cavity, an injection-molded product is arranged in the cavity, an inclined reverse buckle is arranged on the product and is obliquely and reversely buckled on the core, air holes are arranged in the core and the core insert, the air holes are externally connected with an air source and internally communicated with the cavity, a stripper plate is arranged outside the wall of the core, the inner side parting surface of the stripper plate is abutted against the bottom surface of the outermost profile of the product, lock sleeves are arranged in the outer walls on two sides of the stripper plate, a compression spring and a lock block are arranged in each lock sleeve, the head of each lock block extends out of each lock sleeve, an inclined surface is arranged below the head of each lock cavity, a draw hook rod is arranged on the outer wall of the corresponding cavity, and extends upwards to the lower part of the sprue plate, and the head is provided with a drag hook, the outer wall of the corresponding core fixing plate is provided with a unhooking plate, the unhooking plate extends downwards to the cavity and is provided with a unhooking, the drag hook is matched with the upper surface of the locking block during mold opening, and the unhooking is matched with the inclined plane during resetting.

The injection mold with the fixed-distance demolding mechanism has the advantages that during demolding, the cavity and the cavity insert are driven by the power of an injection molding machine to move downwards to open the mold, a product is kept on the core and the core insert without moving, the stripper plate is also not moved, after the mold is opened for a certain distance, the draw hook is in contact with the upper surface of the locking block to drive the stripper plate to move downwards, the core and the core insert are always kept without moving, the inner parting surface of the stripper plate is abutted against the bottom surface of the outermost contour of the product, meanwhile, air holes are filled, the cavity is blown up, the product and the inclined inverted buckle are driven to be forcedly stripped from the core and the core insert, demolding is completed, and finally, the product is taken away by workers or a mechanical arm. When the product is forced to be stripped, the plastic is not completely cooled and solidified after the product is just molded, the inclined reverse buckle part can slightly deform due to forced stripping, but the inclined reverse buckle part can automatically recover after being stripped, and the product quality is not influenced. When the mold is reset, the unhooking plate is contacted with the inclined plane to compress the compression spring, the head of the locking block is retracted into the lock sleeve and is separated from the draw hook, the stripper plate is reset under the action of the unhooking plate, and other parts of the mold are reset to be the same as the conventional mold. In actual production, the unhooking plate is sleeved outside the pull hook rod, and the assembly is convenient.

Drawings

FIG. 1 is a schematic view of an injection mold having a distance ejection mechanism according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a cross-sectional view of the lock block and the drawbar and trip plate of the present invention;

fig. 4 is a perspective view of the injection mold with a distance ejector mechanism of the present invention.

Detailed Description

The utility model relates to an injection mould with a fixed-distance demoulding mechanism, which comprises a bottom plate 1 and a gate plate 2, wherein a cavity 3 is arranged on the bottom plate, a cavity insert 4 is arranged in the cavity, a gate ferrule 5 is arranged in the gate plate, a core fixing plate 6 is arranged below the gate plate, a core 7 is arranged below the core fixing plate, a core insert 8 is arranged below the core, the core 7 and the core insert 8 are matched with the cavity insert 4 to form a mould cavity, an injection-molded product 9 is arranged in the mould cavity, an inclined inverted buckle 10 is arranged on the product, the inclined inverted buckle 10 is buckled on the core 7, air holes 11 are arranged in the core 7 and the core insert 8, the air holes are externally connected with an air source and are communicated with the mould cavity, a stripper plate 12 is arranged outside the wall of the core 7, the inner side surface 13 of the stripper plate 12 is abutted against the bottom surface of the outermost contour of the product 9, locking sleeves 15 are arranged in the outer walls on two sides of the stripper plate 12, and compression springs 21 and locking blocks 16 are arranged in the locking sleeves, the head of the locking block 16 extends out of the locking sleeve 15, an inclined plane 14 is arranged below the head of the locking block, a draw hook rod 17 is arranged on the outer wall of the corresponding cavity 3, the draw hook rod extends upwards to the lower part of the sprue gate 2, a draw hook 18 is arranged at the head of the locking block, a unhooking plate 19 is arranged on the outer wall of the corresponding core fixing plate 6, the unhooking plate extends downwards to the cavity 3, a unhooking 20 is arranged at the position, when the mold is opened, the draw hook 18 is matched with the upper surface of the locking block 16, and when the mold is reset, the unhooking 20 is matched with the inclined plane 14. During demoulding, the cavity 3 and the cavity insert 4 are driven by the power of an injection molding machine to move downwards for mould opening, the product 9 is left on the core 7 and the core insert 8 without moving, the stripper plate 12 is also without moving, after the mould is opened for a certain distance, the draw hook 18 is contacted with the upper surface of the locking block 16 to drive the stripper plate 12 to move downwards, the core 7 and the core insert 8 are always kept still, the inner side parting surface 13 of the stripper plate 12 is abutted against the bottom surface of the outermost contour of the product 9, meanwhile, the air holes 11 are filled with air, the mould cavity is blown up, the product 9 and the inclined reverse buckle 10 are driven to be forcedly released from the core 7 and the core insert 8, demoulding is completed, and finally, a worker or a mechanical arm takes away the product. When the product is forced to be stripped, the plastic is not completely cooled and solidified after the product is just molded, the inclined reverse buckle part can slightly deform due to forced stripping, but the inclined reverse buckle part can automatically recover after being stripped, and the product quality is not influenced. When the mould is reset, the unhooking plate 20 is contacted with the inclined surface 14, so that the compression spring 21 is compressed, the head part of the locking block 16 is retracted into the locking sleeve 15 and is separated from the draw hook 18, the stripper plate 12 is reset under the action of the unhooking plate 19, and other parts of the mould are reset as the same as the conventional mould. In actual production, the unhooking plate 19 is sleeved outside the pull hook rod 17, and assembly is convenient.

Claims

1. An injection mold with a fixed-distance demolding mechanism is characterized by comprising a bottom plate (1) and a gate plate (2), wherein a cavity (3) is arranged on the bottom plate, a cavity insert (4) is arranged in the cavity, a gate ferrule (5) is arranged in the gate plate, a core fixing plate (6) is arranged below the gate plate, a core (7) is arranged below the core fixing plate, a core insert (8) is arranged below the core, the core (7) and the core insert (8) are matched with the cavity insert (4) to form a mold cavity, an injection-molded product (9) is arranged in the mold cavity, an inclined inverted buckle (10) is arranged on the product, the inclined inverted buckle (10) is buckled on the core (7), air holes (11) are formed in the core (7) and the core insert (8), an air source is externally connected with the air holes, the mold cavity is internally communicated with the mold cavity, a demolding plate (12) is arranged outside the wall of the core (7), and the inner side surface (13) of the demolding plate (12) abuts against the bottom surface of the outline of the product (9), and set up lock sleeve (15) in the both sides outer wall of taking off flitch (12), set up compression spring (21) and locking piece (16) in the lock sleeve, the head of locking piece (16) stretches out outside lock sleeve (15), and system inclined plane (14) below its head, set up pull rod (17) on corresponding die cavity (3) outer wall, pull rod upwards extends runner plate (2) below, and set up drag hook (18) at the head, set up unhook board (19) on corresponding core fixed plate (6) outer wall, unhook board extends die cavity (3) department downwards, and set up unhook (20) in this department, during the die sinking, drag hook (18) cooperate with the higher authority of locking piece (16), during the restoration, unhook (20) cooperate with inclined plane (14).