CN114407294A

CN114407294A - Fixed die inclined ejection mechanism of injection mold

Info

Publication number: CN114407294A
Application number: CN202111557625.4A
Authority: CN
Inventors: 杨炯
Original assignee: Zhejiag Taizhou Meiduo Mould Co ltd
Current assignee: Zhejiag Taizhou Meiduo Mould Co ltd
Priority date: 2021-12-19
Filing date: 2021-12-19
Publication date: 2022-04-29

Abstract

The invention relates to a fixed die inclined ejection mechanism of an injection mold, which comprises a movable die and a fixed die, wherein the fixed die comprises a fixed die base plate and a fixed die insert, a mounting hole is formed in the fixed die insert, an inclined ejector and a floating insert are arranged in the mounting hole, the side surface of the floating insert is obliquely arranged, the inclined ejector is tightly attached to the side surface of the floating insert, the inclined ejector is connected with the floating insert, a spring groove is formed in the tail part of the floating insert, a stud is arranged in the spring groove, one end of the stud is fixed on a fixed die base plate, a spring is sleeved on the stud, and two ends of the spring are respectively contacted with the fixed die base plate and the groove bottom of the spring groove. Compared with the prior art, the die-opening automatic ejection mechanism is provided with the floating insert and the inclined ejector, the floating insert realizes die-opening automatic ejection through the spring compressed during die closing, and drives the inclined ejector to eject and loose the core so that a product is separated from a fixed die, the structure is simple, the occupied space is small, the complete product demolding is ensured, and the production efficiency of the product is improved.

Description

Fixed die inclined ejection mechanism of injection mold

Technical Field

The invention relates to a fixed die inclined ejection mechanism of an injection mold, and belongs to the technical field of injection molds.

Background

The injection mold often encounters a reverse buckle on a product, and if the reverse buckle is forcedly demolded, the product is damaged, so that the product is demolded unsuccessfully. In the prior art, the product back-off usually exists in a movable die, and the back-off is ejected out by adopting a mode that a stripper plate or an oil cylinder drives an inclined ejector. However, when the back-off exists in the fixed die, the product back-off sticks to the cavity, forced demolding can strain the product, but the space in the fixed die is narrow and small, and a stripper plate and an oil cylinder are difficult to install, so that the core pulling difficulty of the fixed die is high, and a solution is needed urgently.

Disclosure of Invention

The invention aims to provide a fixed die inclined ejection mechanism of an injection mold for realizing stable core pulling of a fixed die, aiming at the defects of the prior art.

The technical scheme adopted by the invention for realizing the purpose is as follows:

injection mold's cover half pushes up ejection mechanism to one side, including movable mould and cover half, the cover half includes cover half bottom plate and cover half insert, the system has the mounting hole in the cover half insert, be provided with oblique top and the unsteady insert in the mounting hole, the side slope setting of the unsteady insert, oblique top with the side of unsteady insert is hugged closely, oblique top with the unsteady insert is connected, the afterbody system of unsteady insert has the spring groove, be provided with the double-screw bolt in the spring groove, the one end of double-screw bolt is fixed on the cover half bedplate, the cover is equipped with the spring on the double-screw bolt, the both ends of spring respectively with the cover half bedplate with the tank bottom in spring groove contacts.

As a further optimization of the above technical solution: and a lug which enables a product to be in upper collision and perforation molding is arranged at the head part of the floating insert.

As a further optimization of the above technical solution: the mounting hole comprises a large hole and a small hole, a first step is formed between the large hole and the small hole, a second step is formed by protruding the side surface of the floating insert, and the second step is contacted with the first step in the ejection process of the floating insert.

As a further optimization of the above technical solution: the floating insert is provided with a clamping block, the inclined top is correspondingly provided with a clamping groove, and the clamping block is clamped in the clamping groove.

As a further optimization of the above technical solution: still be provided with the oblique top slide in the mounting hole, the oblique top slide is fixed in the cover half inlay, the system has the spout on the slide of pushing up to one side, partly position in the spout of pushing up to one side can slide in the spout.

Compared with the prior art, the die-opening automatic ejection mechanism is provided with the floating insert and the inclined ejector, the floating insert realizes die-opening automatic ejection through the spring compressed during die closing, and drives the inclined ejector to eject and loose the core so that a product is separated from a fixed die, the structure is simple, the occupied space is small, the complete demolding of the product is ensured, and the production efficiency of the product is improved; the first step on the mounting hole is matched with the second step on the floating insert to limit the ejection process; the inclined top sliding seat is arranged to play a role in guiding and sliding in the ejection process of the inclined top.

Drawings

Fig. 1 is a schematic cross-sectional structure of the present invention.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

FIG. 3 is a schematic cross-sectional view of another embodiment of the present invention.

Detailed Description

The invention is further described with reference to the following figures and detailed description. As shown in fig. 1-3, the fixed die inclined top ejection mechanism of the injection mold comprises a movable die and a fixed die, wherein the fixed die comprises a fixed die bottom plate 1 and a fixed die insert 2, a mounting hole 21 is formed in the fixed die insert 2, and an inclined top 3 and a floating insert 4 are arranged in the mounting hole 21. The two sides of the floating insert 4 are obliquely arranged, and the oblique top 3 is clung to the side surface of the floating insert 4. The lifter 3 is connected with the floating insert 4. The tail part of the floating insert 4 is provided with a spring groove 41, a stud 5 is arranged in the spring groove 41, one end of the stud 5 is fixed on the fixed die base plate 1, a spring 6 is sleeved on the stud 5, and two ends of the spring 6 are respectively contacted with the fixed die base plate 1 and the groove bottom of the spring groove 41. When the die is closed, the spring 6 is in a compressed state; after the injection molding is finished, the movable mold is separated from the fixed mold, the spring 6 releases elasticity to drive the floating insert 4 and the inclined top 3 to eject out, the inclined top 3 and the floating insert 4 eject out a product back-off part, and meanwhile, the inclined top 3 inclines along the floating insert 4 to the direction far away from the floating insert 4 to perform core pulling on the product back-off, so that the product is separated from the fixed mold. The ejection structure matched with the pitched roof 3 and the floating insert 4 occupies a small space, is simple in structure, ensures complete product demolding, and improves the production efficiency of products.

In the above technical scheme: the head of the floating insert 4 is formed with a projection 44 for making the product bump against the perforation. Because the product is provided with the collision perforation, the movable die is also provided with a matching block for forming the collision perforation of the product, and when the die is closed, the matching block on the movable die is contacted with the lug 44 and extrudes the floating insert 4, so that the floating insert 4 is reset.

In the above technical scheme: the mounting hole 21 includes a large hole and a small hole with a first step 22 formed therebetween. The side of the floating insert 4 is convex forming a second step 42. During the ejection process of the floating insert 4, the second step 42 contacts with the first step 22, and the movement of the floating insert 4 is limited.

In the above technical scheme: the floating insert 4 is provided with a clamping block 43, the inclined top 3 is correspondingly provided with a clamping groove, and the clamping block 43 is clamped in the clamping groove to realize the connection between the floating insert 4 and the inclined top 3.

In the above technical scheme: an inclined top sliding seat 7 is further arranged in the mounting hole 21, the inclined top sliding seat 7 is fixed in the fixed die insert 2, a sliding groove 71 is formed in the inclined top sliding seat 7, and a part of the inclined top 3 is located in the sliding groove 71 and can slide in the sliding groove 71. The sliding groove 71 plays a role in guiding and sliding the ejection process of the lifter 3.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concept of the present invention should fall within the scope of the present invention.

Claims

1. A fixed die inclined ejection mechanism of an injection mold comprises a movable die and a fixed die, wherein the fixed die comprises a fixed die bottom plate (1) and a fixed die insert (2), it is characterized in that a mounting hole (21) is arranged in the fixed die insert (2), an inclined top (3) and a floating insert (4) are arranged in the mounting hole (21), the side surface of the floating insert (4) is obliquely arranged, the oblique top (3) is clung to the side surface of the floating insert (4), the inclined top (3) is connected with the floating insert (4), the tail part of the floating insert (4) is provided with a spring groove (41), a stud (5) is arranged in the spring groove (41), one end of the stud (5) is fixed on the fixed die base plate (1), the stud (5) is sleeved with a spring (6), and two ends of the spring (6) are respectively in contact with the fixed die base plate (1) and the bottom of the spring groove (41).

2. The fixed die inclined ejection mechanism of the injection mold according to claim 1, characterized in that the head of the floating insert (4) is provided with a projection (44) for making the product collide with the perforation.

3. The fixed die lifter ejection mechanism of the injection die according to claim 1, characterized in that the mounting hole (21) comprises a large hole and a small hole, a first step (22) is formed between the large hole and the small hole, the side surface of the floating insert (4) is protruded to form a second step (42), and the second step (42) is contacted with the first step (22) during ejection of the floating insert (4).

4. The fixed die inclined top ejection mechanism of the injection mold according to claim 1, wherein a clamping block (43) is formed on the floating insert (4), a clamping groove is correspondingly formed on the inclined top (3), and the clamping block (43) is clamped in the clamping groove.

5. The fixed die lifter ejection mechanism of the injection die according to claim 1, wherein a lifter slide (7) is further arranged in the mounting hole (21), the lifter slide (7) is fixed in the fixed die insert (2), a sliding groove (71) is formed in the lifter slide (7), and a part of the lifter (3) is positioned in the sliding groove (71) and can slide in the sliding groove (71).