Small back-off separation core-pulling device in narrow space

Abstract

The utility model discloses a small back-off separation core-pulling device in a narrow space. The small back-off separation core-pulling device comprises a straight ejector, a straight ejector rod, a first elastic block and a second elastic block, the straight ejector is installed in the movable mold plate, the movable mold plate is correspondingly provided with a straight ejector groove, and one end of the straight ejector rod extends into the straight ejector groove in a sliding mode and is connected with the bottom of the straight ejector. A first elastic block and a second elastic block are slidably arranged on the two sides of the top of the straight ejector correspondingly, an inverted buckle is clamped between the first elastic block and the second elastic block, the inner side of the first elastic block and the inner side of the second elastic block are connected with the top of the straight ejector through springs correspondingly, and the outer side of the first elastic block and the outer side of the second elastic block are slidably connected with the upper portion of the straight ejector groove correspondingly. And sliding surfaces between the first elastic block and the straight ejection groove and between the second elastic block and the straight ejection groove are inclined surfaces respectively. According to the utility model, the straight ejector rod extends into the straight ejector groove to eject the straight ejector upwards, so that the first elastic block and the second elastic block slide outwards along the inclined surface, and the inverted buckle in the middle is separated. According to the utility model, the structure space is effectively saved, the separation of a small inverted buckle in the middle of a product can be met, and the practicability is better.

Description

Technical Field

[0001] This utility model belongs to the technical field of injection molds, specifically relating to a small undercut release and core-pulling device for narrow spaces. Background Technology

[0002] In mold design, injection molding is an important method of product forming. Injection molding utilizes the principle that plastic materials change shape under high temperature and pressure, using plastic molds to create the products people need. Currently, some plastic parts require not only core pulling after injection molding but also angled ejection to remove undercuts from the product. However, current injection molds generally use angled ejection for core pulling and ejection. With product design updates, when small undercuts are present in the middle of the product, and space is limited, the conventional angled ejection structure cannot remove the undercuts. Utility Model Content

[0003] The purpose of this invention is to provide a small, inverted, detachable core-pulling device for use in narrow spaces, in order to solve the aforementioned problems.

[0004] This utility model is mainly achieved through the following technical solutions:

[0005] A small, inverted snap-out core-pulling device for narrow spaces includes a straight pusher, a straight pusher rod, a first spring block, and a second spring block. The straight pusher is installed inside a moving template, and the moving template is correspondingly provided with a straight pusher groove. One end of the straight pusher rod slides into the straight pusher groove and connects to the bottom of the straight pusher. The first spring block and the second spring block are slidably arranged on both sides of the top of the straight pusher, respectively. An inverted snap is clamped between the first spring block and the second spring block. The inner sides of the first spring block and the second spring block are respectively connected to the top of the straight pusher through springs. The outer sides of the first spring block and the second spring block are respectively slidably connected to the upper part of the straight pusher groove. The sliding surfaces between the first spring block and the straight pusher groove, and between the second spring block and the straight pusher groove, are inclined surfaces.

[0006] To better realize this utility model, it further includes a limiting mechanism, which includes a limiting block and a limiting groove; limiting blocks are respectively installed on both sides of the straight top, and the bottoms of the first spring block and the second spring block are respectively provided with limiting grooves corresponding to the limiting blocks.

[0007] To better realize this utility model, the limiting block is further fixedly connected to the straight pin by screws.

[0008] To better realize this utility model, the lower part of the straight top groove is fitted with the straight top, and the upper part of the straight top groove is slidably fitted with the first spring block and the second spring block.

[0009] To better realize this utility model, the bottom of the straight top is provided with a plug groove corresponding to the straight top rod, and one end of the straight top rod slides into the straight top groove and connects with the plug groove of the straight top.

[0010] To better realize this utility model, the bottom of the straight push rod is further connected to the push pin plate.

[0011] The beneficial effects of this utility model are as follows:

[0012] This invention uses a straight push rod that extends into a straight push groove to lift the push rod upwards, causing the first and second spring blocks to slide outwards along the inclined surface, thus disengaging the central buckle. This invention effectively saves structural space and allows for the disengagement of a small, centrally located buckle within a confined space, demonstrating good practicality. Furthermore, this invention uses a limiting mechanism to restrict the movement of the first and second spring blocks on both sides, enabling reuse. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the small inverted release core-pulling device for narrow spaces according to this utility model;

[0014] Figure 2 This is a schematic diagram of the ejected state of the small inverted core-pulling device for narrow spaces according to this utility model.

[0015] Among them: 1-straight push, 2-straight push rod, 3-first spring block, 4-second spring block, 5-moving template, 6-straight push groove, 7-spring, 8-limiting block, 9-inverted buckle. Detailed Implementation

[0016] Example 1:

[0017] A small, inverted buckle release and core-pulling device for narrow spaces includes a straight pusher 1, a straight pusher rod 2, a first spring block 3, and a second spring block 4. The straight pusher 1 is installed inside a movable template 5, and the movable template 5 is correspondingly provided with a straight pusher groove 6. One end of the straight pusher rod 2 slides into the straight pusher groove 6 and connects to the bottom of the straight pusher 1. The first spring block 3 and the second spring block 4 are slidably arranged on both sides of the top of the straight pusher 1, respectively. An inverted buckle 9 is clamped between the first spring block 3 and the second spring block 4. The inner sides of the first spring block 3 and the second spring block 4 are respectively connected to the top of the straight pusher 1 through springs 7. The outer sides of the first spring block 3 and the second spring block 4 are respectively slidably connected to the upper part of the straight pusher groove 6. The sliding surfaces between the first spring block 3 and the straight pusher groove 6 and between the second spring block 4 and the straight pusher groove 6 are inclined surfaces.

[0018] During use, the front and rear molds of this invention open, the pin plate ejects, and the straight ejector rod 2 on the pin plate rises, driving the straight ejector 1 to eject in the positive Z direction. As the straight ejector 1 ejects, it is no longer at the bottom of the straight ejector groove 6. At this point, there is space between the upper side of the straight ejector groove 6 and the spring block. Under the action of the spring 7, the first spring block 3 and the second spring block 4 on both sides slide along the inclined surface and eject to both sides until they eject to the limit position of the limit mechanism on both sides. At this point, the product buckle 9 between the first spring block 3 and the second spring block 4 is disengaged.

[0019] This invention uses a straight push rod 2 that extends into a straight push groove 6 to lift the straight push rod 1 upwards, causing the first spring block 3 and the second spring block 4 to slide outwards along the inclined surface, thereby disengaging the central buckle 9. This invention effectively saves structural space and allows the small, centrally located buckle 9 to disengage in confined spaces, demonstrating good practicality. Furthermore, this invention uses a limiting mechanism to restrict the movement of the first spring blocks 3 and the second spring blocks 4 on both sides, enabling reuse.

[0020] Example 2:

[0021] A small, inverted, release-type core-pulling device for confined spaces, such as Figure 1 and Figure 2 As shown, the main components include a straight pusher 1, a straight pusher rod 2, a spring block, a spring 7, and a limiting block 8. The moving template 5 is provided with a straight pusher groove 6 corresponding to the straight pusher 1. The bottom of the straight pusher rod 2 is connected to the needle plate, and the top slides into the straight pusher groove 6 and connects to the straight pusher 1. Spring blocks are fitted inside on both sides of the top of the straight pusher 1, forming a bidirectional pop-out core-pulling structure, which cleverly pulls out the product buckle 9. The straight pusher rod 2 is installed at the bottom of the straight pusher 1, and a first spring block 3 and a second spring block 4 are slidably arranged on both sides of the top. The inner sides of the first spring block 3 and the second spring block 4 are connected to the middle of the straight pusher 1 through the spring 7, and the outer sides are inclined sidewalls that fit with the upper inclined surface of the straight pusher groove 6. The outer inclined sidewalls of the first spring block 3 and the second spring block 4 are slidably connected to the upper inclined surface of the straight pusher groove 6. A buckle 9 is provided between the first spring block 3 and the second spring block 4.

[0022] like Figure 2 As shown, after the ejector pin 1 is ejected, the first spring block 3 and the second spring block 4 on both sides have space to move outward. Under the action of the spring 7, the first spring block 3 and the second spring block 4 on both sides of the upper part of the ejector pin 1 slide upward along the inclined surface and pop out, so that the undercut 9 of the product is disengaged, thereby completing the demolding of the undercut 9. It is especially suitable for demolding small undercut 9. Preferably, the spring block and the ejector pin 1 are usually made of P20; the spring 7 is a standard part; the limiting block 8 is usually made of S45C; the ejector pin 2 is usually made of SKD61 with a hardness of HRC50±2, all of which are commonly used materials for injection molds.

[0023] like Figure 2 As shown, the straight ejector 1 is installed inside the moving template 5, and the straight ejector rod 2 is installed on the ejector plate. Its function is that as the mold opens, the ejector plate is ejected, which drives the straight ejector 1 to be ejected, thereby ejecting the product. The two side spring blocks are installed inside the straight ejector 1. Their function is that when the straight ejector 1 is ejected, the two side spring blocks pop out, thereby realizing the demolding of the product undercut 9. The limiting block 8 is installed inside the straight ejector 1. Its function is to control the distance of the spring block popping out. The spring 7's function is to give the spring block a driving force, allowing the spring block to pop out to both sides.

[0024] Working principle: The mold opens from the front and rear molds → the pin plate ejects → the straight ejector 1 is ejected in the positive Z direction. As the straight ejector 1 is ejected, it is no longer in the straight ejector groove 6, creating space on the sides. The spring blocks on both sides are ejected to the sides under the force of the spring 7 until they reach the positions of the limit blocks 8 on both sides. At this point, the spring blocks have ejected completely, and the product undercut 9 has disengaged.

[0025] This invention is effective when normal angled ejection cannot be achieved. The advantages of this structure are obvious: it occupies little mold space, has a simple structure and principle, and its effect is significant. It simply and efficiently solves the problem of undercut demolding when product space is limited, and it is versatile; other products with similar product structures can use this mold structure in their mold data.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A small, inverted, detachable core-pulling device for use in confined spaces, characterized in that: It includes a straight pusher (1), a straight pusher rod (2), a first spring block (3), and a second spring block (4); the straight pusher (1) is installed in a moving template (5), the moving template (5) is provided with a straight pusher groove (6), one end of the straight pusher rod (2) slides into the straight pusher groove (6) and connects to the bottom of the straight pusher (1); the first spring block (3) and the second spring block (4) are slidably arranged on both sides of the top of the straight pusher (1), the first spring block (3) and the second spring block (4) are clamped together with a buckle (9), the inner sides of the first spring block (3) and the second spring block (4) are respectively connected to the top of the straight pusher (1) through springs (7), the outer sides of the first spring block (3) and the second spring block (4) are respectively slidably connected to the upper part of the straight pusher groove (6), and the sliding surfaces between the first spring block (3) and the straight pusher groove (6) and between the second spring block (4) and the straight pusher groove (6) are inclined surfaces.

2. A small undercut clearance device for a narrow space according to claim 1, characterized in that, It also includes a limiting mechanism, which includes a limiting block (8) and a limiting groove; the two sides of the straight top (1) are respectively equipped with limiting blocks (8), and the bottoms of the first spring block (3) and the second spring block (4) are respectively provided with limiting grooves corresponding to the limiting blocks (8).

3. A small undercut clearance device for a narrow space according to claim 2, characterized in that The limiting block (8) is fixedly connected to the straight pin (1) by screws.

4. A small undercut clearance device for a narrow space according to claim 1, characterized in that, The lower part of the straight top groove (6) is engaged with the straight top (1), and the upper part of the straight top groove (6) is engaged with the first spring block (3) and the second spring block (4).

5. A small-sized undercut core ejection device for a narrow space according to claim 1 or 4, characterized in that, The bottom of the straight top (1) is provided with a plug groove corresponding to the straight top rod (2). One end of the straight top rod (2) slides into the straight top groove (6) and connects with the plug groove of the straight top (1).

6. A small undercut clearance device for a narrow space according to claim 5, characterized in that The bottom of the straight push rod (2) is connected to the push plate.

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