CN212603109U - Injection mold with replaceable mold core - Google Patents

Abstract

The utility model relates to an injection mold of removable mold core, including hot runner system, mold core system, cooling system, demolding system and limit lock, guide pin bushing guide pillar and location connecting device. The mold core system comprises a front mold core and a rear mold core assembly; the rear die core assembly comprises a rear die core part and a connecting part with a fixed shape; the mold stripping system is internally provided with a rear mold core base, and the upper end of the rear mold core base is provided with a connecting part II with a fixed shape; the first connecting part and the second connecting part are detachably connected; a front mold core hole with a fixed shape is arranged on a template of the front mold core, and the outer contour of the front mold core is matched with the front mold core hole; and a rear mold core assembly hole with a fixed shape is formed in the template of the rear mold core assembly, and the outer contour of the rear mold core assembly is matched with the rear mold core assembly hole. The utility model discloses an useful part lies in, produces different products and only need change the mold core system and need not change template and other systems, has greatly reduced the mould cost, has shortened mould manufacturing cycle.

Description

Injection mold with replaceable mold core

Technical Field

The utility model relates to an injection mold, in particular to injection mold of removable mold core.

Background

The mold consists of mold plate and mold core, and is connected via side lock, guide sleeve and guide post and precise positioning. The template is provided with a hot runner, a cooling system, a mold stripping system and mold core holes. In the current industry, every product developed, including products of the same series but different specifications and products with local differences, needs to independently manufacture a whole set of dies including all the systems, so that the die manufacturing period is long, the manufacturing cost is high, and great resource waste is brought to the society.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides an injection mold of removable mold core only needs to change the mold core system to reduce the mould cost, shortened mould manufacturing cycle.

The technical scheme provided by the utility model does: an injection mold with a replaceable mold core comprises a hot runner system, a mold core system, a cooling system, a mold stripping system, a side lock, a guide sleeve guide pillar and a positioning connecting device; the mold core system comprises a front mold core and a rear mold core assembly; the rear die core assembly comprises a rear die core part and a connecting part; the mold stripping system is internally provided with a rear mold core base, and the upper end of the rear mold core base is provided with a connecting part II; the first connecting part and the second connecting part are detachably connected. The first connecting part and the second connecting part form a push rod, so that the product is separated from the die. The template of the front mold core is provided with a front mold core hole with a fixed shape, and the outer contour of the front mold core is matched and assembled with the front mold core hole. And a rear mold core assembly hole with a fixed shape is formed in the template of the rear mold core assembly, and the outer contour of the rear mold core assembly is matched and assembled with the rear mold core assembly hole. The connecting part of the rear mold core assembly is fixed in size and is matched and assembled with the connecting part of the demolding system with the same fixed size. The connecting part can be in internal and external thread connection or screw connection or other common connection modes as long as the connecting part and the connecting part can be fastened together. According to different products to be manufactured, a product cavity formed by the front mold core and the rear mold core assembly is changed, and the overall external outline of the front mold core and the rear mold core assembly is not changed, so that the mold core system is only needed to be replaced even if the produced products are replaced, and the mold plate and other parts such as a hot runner system, a cooling system, a mold stripping system and the like arranged on the mold plate are not needed to be replaced. When the push rod works, the push rod in the prior art can be formed by connecting the first connecting part with the second connecting part, and the front mold core and the rear mold core are assembled into a set template hole position.

As a further improvement, the rear die core part and the connecting part are the same cylinder; the outer surface of the upper end of the rear mould core part is provided with a thread groove; the rear die core assembly also comprises an anti-rotation insert which is sleeved outside the connecting part; one end of the anti-rotation insert is provided with at least one bulge which extends into the cavity; the anti-rotation insert is fixed on the template; the demolding system comprises a driving device; the driving device is connected to the mold core base and can enable the mold core base to rotate around the shaft. The structure can be used for producing products with threads, such as bottle caps, the rear mold core is rotated through the driving device, the bottle caps are limited by the anti-rotation inserts and cannot rotate, the threads of the bottle caps and the rear mold core are separated, and then the push plate where the rear mold core is located is pushed forwards to separate the bottle caps from the rear mold core.

As a further improvement, the rear die core assembly further comprises a pushing block, the pushing block is fixed on the die plate and is pushed against the opening of the bottle cap, and the pushing block is used for pushing a product away from the die when the product is demoulded.

As a second improvement mode, the rear die core assembly comprises a push rod, a rear die insert, an annular tooth rod and a push block; the push rod is a cylinder, and the rear mold insert is an annular column sleeved outside the push rod; the tooth bar is sleeved outside the rear mold insert; the upper part of the push rod, the upper part of the rear mold insert and the upper part of the tooth rod form a rear mold core part together; the lower part of the push rod is connected with a part; the outer surface of the upper part of the tooth rod is provided with a thread groove; the upper part of the push rod, the upper part of the tooth rod, the rear mold insert and the front mold core form a cavity together; the rear mold insert is fixed on the template. The push block is propped against the opening of the bottle cap. The structure can be used for producing products with screw teeth of different structures, such as bottle caps with inner rings, and the screw teeth of the products can be directly matched with a template or a pushing block through a pushing rod to push the products away from a rear template component during demolding due to the structure.

The utility model discloses an useful part lies in, produces different products and only need change the mold core system and need not change template and other systems, has greatly reduced the mould cost, has shortened mould manufacturing cycle.

Drawings

Fig. 1 is an exploded schematic view of a first embodiment of the injection mold with a replaceable mold core according to the present invention.

Fig. 2 is a schematic view of a combined structure of the first embodiment of the injection mold with a replaceable mold core.

Fig. 3 is a schematic view of an exploded structure of a second embodiment of the injection mold with a replaceable mold core according to the present invention.

Fig. 4 is a schematic view of a combined structure of a second embodiment of the injection mold with a replaceable mold core according to the present invention.

Detailed Description

A first embodiment of the injection mold with a replaceable mold core shown in fig. 1-2 is a mold for a bottle cap, and includes a hot runner system, a mold core system, a cooling system, a demolding system, a side lock, a guide sleeve guide post, and a positioning connection device. The mold core system comprises a front mold core 1 and a rear mold core assembly 2. The template of the front mold core 1 is provided with a front mold core hole with a fixed shape, and the outer contour of the front mold core 1 is matched and assembled with the front mold core hole. And a rear mold core assembly hole with a fixed shape is formed in the template of the rear mold core assembly 2, and the outer contour of the rear mold core assembly 2 is matched and assembled with the rear mold core assembly hole. The rear die core assembly 2 comprises a rear die core part 3 and a connecting part 4, and the rear die core part 3 and the connecting part 4 are the same cylinder. The outer surface of the rear mould core part 3 is provided with a thread groove. The bottom of the first connecting part 4 is provided with screw teeth matched with the second connecting part 10. The anti-rotation insert 5 is an annular body sleeved on the outer surface of the connecting part 4, and the lower edge of the anti-rotation insert is fixed on the template. The upper end of the anti-rotation insert 5 is provided with two bulges 7 which extend into the cavity of the bottle cap. The upper end of the anti-rotation insert 5 is also sleeved with an annular push block 6. A cylindrical rear mold core base 8 is arranged in the mold stripping system, a second connecting part 9 is arranged at the upper end of the rear mold core base 8, and the upper part of the second connecting part 9 is provided with a screw tooth matched with the first connecting part 4. A driving device 10 is connected to the rear mold core base 8, and the rear mold core base 8 can rotate around the shaft. The drive means 10 is fixed to the formwork.

A second embodiment of the mold core-replaceable injection mold shown in fig. 3-4 is another mold for a bottle cap, which includes a hot runner system, a mold core system, a cooling system, a demolding system, a side lock, a guide sleeve guide post, and a positioning connection device. The mold core system includes a front mold core 11 and a rear mold core assembly 12. The template of the front mold core 11 is provided with a front mold core hole with a fixed shape, and the outer contour of the front mold core 11 is matched and assembled with the front mold core hole. A rear mold core assembly hole with a fixed shape is arranged on the template of the rear mold core assembly 12, and the outer contour of the rear mold core assembly 12 is matched and assembled with the rear mold core assembly hole. The rear mold core assembly comprises a push rod 13, a rear mold insert 14, an annular tooth rod 15 and a push block 19. The push rod 13 is a cylinder, and the rear mold insert 14 is a ring-shaped member sleeved outside the push rod 13. The tooth rod 15 is sleeved outside the rear mold insert 14, and the push block 19 is sleeved outside the tooth rod 15. The upper part of the push rod 13, the upper part of the rear mold insert 14 and the upper part of the tooth rod 15 jointly form a rear mold core part. The lower part of the push rod 13 is connected with a part 16. The upper outer surface of the screw rod 15 is provided with screw thread grooves to form screw threads of the bottle cap. The rear mold insert 14 is fixed to the mold plate. The demolding system is internally provided with a cylindrical rear mold core base 17, the upper end of the rear mold core base 17 is provided with a second connecting part 18, and the upper part of the second connecting part 18 is provided with a screw tooth matched with the first connecting part 4.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the scope of knowledge possessed by those skilled in the art.

Claims (5)

1. An injection mold with a replaceable mold core comprises a hot runner system, a mold core system, a cooling system, a mold stripping system, a side lock, a guide sleeve guide pillar and a positioning connecting device; the method is characterized in that: the mold core system comprises a front mold core and a rear mold core assembly; the rear die core assembly comprises a rear die core part and a connecting part with a fixed shape; the mold stripping system is internally provided with a rear mold core base, and the upper end of the rear mold core base is provided with a connecting part II with a fixed shape; the first connecting part and the second connecting part are detachably connected; a front mold core hole with a fixed shape is arranged on a template of the front mold core, and the outer contour of the front mold core is matched with the front mold core hole; and a rear mold core assembly hole with a fixed shape is formed in the template of the rear mold core assembly, and the outer contour of the rear mold core assembly is matched with the rear mold core assembly hole.

2. The core-replaceable injection mold of claim 1, wherein: the rear die core part and the connecting part are the same cylinder; the outer surface of the upper end of the rear mould core part is provided with a thread groove; the rear die core assembly also comprises an anti-rotation insert which is sleeved outside the connecting part; one end of the anti-rotation insert is provided with at least one bulge which extends into the cavity; the anti-rotation insert is fixed on the template; the demolding system comprises a driving device; the driving device is connected to the mold core base and can enable the mold core base to rotate around the shaft.

3. The core-replaceable injection mold according to any one of claims 1 or 2, wherein: the rear mold core assembly further comprises a push block.

4. The core-replaceable injection mold of claim 1, wherein: the rear mold core assembly comprises a push rod, a rear mold insert and an annular tooth rod push block; the push rod is a cylinder, and the rear mold insert is an annular column sleeved outside the push rod; the tooth bar is sleeved outside the rear mold insert; the upper part of the push rod, the upper part of the rear mold insert and the upper part of the tooth rod form a rear mold core part together; the lower part of the push rod is connected with a part; the outer surface of the upper part of the tooth rod is provided with a thread groove; the upper part of the push rod, the upper part of the tooth rod, the rear mold insert and the front mold core form a cavity together; the rear mold insert is fixed on the template.

5. The core-replaceable injection mold according to any one of claims 1 or 4, wherein: the rear mold core assembly further comprises a push block.