A mechanism for controlling the delay of an inclined ejector

Abstract

The utility model discloses a mechanism of controlling inclined top ejection delay relates to plastic mould technical field, including bottom needle plate, face needle plate, inclined top, inclined top seat, dowel, inclined top guide block, avoid empty slot, the top of bottom needle plate is provided with face needle plate, the bottom of inclined top seat is fixed with through bolt in bottom needle plate and face needle plate, the inclined top seat is opened with the avoid empty slot for realizing the delay stroke, the inclined top is horizontally provided with the dowel, and the both ends of dowel are slidably accommodated in the avoid empty slot, the length of avoid empty slot is the distance that the inclined top needs to delay ejection, the inclined direction of the middle end of inclined top is installed with inclined top guide block through bolt. This mechanism of controlling inclined top ejection delay opens a simple avoid empty slot on the inclined top seat, utilizes the empty running of mechanical stroke, and accurately realizes the delay ejection function of inclined top, and the delay distance can be accurately controlled by adjusting the length of avoid empty slot, and the process demand of different products is satisfied.

Description

Technical Field

[0001] This utility model relates to the field of plastic mold technology, and in particular to a mechanism for controlling the delay of the inclined ejection. Background Technology

[0002] In modern injection molding processes, to achieve complex plastic product structures, molds often require inclined ejectors, also known as inclined pins or slider mechanisms, to facilitate lateral core pulling or demolding. For products with internal snap-fit, groove, or undercut structures, the demolding sequence is subject to strict requirements.

[0003] Conventional ejector mechanisms are typically linked directly or synchronously with the mold's ejection system, such as ejector plates. During mold opening and ejection, the ejector moves simultaneously with other ejection elements, such as ejector pins. However, for certain product structures, if the ejector performs its core-pulling action too early, it may interfere with the product body before it has fully detached from the mold cavity, causing the product to be scratched, blistered, or even directly damaged. Conversely, if the product body needs to be ejected a certain distance first to make room for the ejector's lateral core-pulling, synchronous ejection mechanisms cannot meet this process requirement. Therefore, the industry needs a simple and reliable mechanism to achieve the delayed ejection function of the ejector. Utility Model Content

[0004] This invention proposes a control mechanism with a simple structure, precise and reliable operation, and effective implementation of the angled ejection delay function to meet the demolding requirements of special structure plastic products and avoid product damage during the ejection process.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a mechanism for controlling the delay of the inclined ejection, comprising a bottom needle plate, a top needle plate, an inclined ejection, an inclined ejection seat, a pin, an inclined ejection guide block, and a clearance groove.

[0006] A face needle plate is provided above the bottom needle plate, and the bottom of the inclined top seat is fixed inside the bottom needle plate and the face needle plate by bolts.

[0007] The inclined top seat is provided with a clearance groove for achieving a delayed stroke, and a pin is transversely inserted on the inclined top, with both ends of the pin slidably accommodated in the clearance groove.

[0008] Furthermore, the length of the clearance groove is the distance by which the inclined top needs to be delayed in its ejection.

[0009] Furthermore, a guide block for the inclined top is installed in the inclined direction at the middle end of the inclined top by bolts.

[0010] Furthermore, the centerline of the inclined guide block is located behind the centerline of the inclined base.

[0011] Furthermore, the inclined top is configured as a rotating structure with the pin as the center under the action of the pin.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. Achieve precise delay: By opening a simple clearance groove on the inclined ejector seat and utilizing the idle run of the mechanical stroke, the delayed ejection function of the inclined ejector is precisely realized; the delay distance can be precisely controlled by adjusting the length of the clearance groove to meet the process requirements of different products.

[0014] 2. Simple and reliable structure: This mechanism is achieved by adding a clearance groove to the inclined top seat and using a pin to cooperate. Compared with complex hydraulic or pneumatic delay mechanisms, its structure is extremely simple, with fewer parts, low manufacturing cost, and very convenient assembly and maintenance.

[0015] 3. Stable and reliable operation: The purely mechanical linkage design has no other auxiliary power source, ensuring stable operation and high repeatability, which greatly reduces the risk of production interruption due to mechanical failure and improves production reliability.

[0016] 4. Protect products and molds: By ensuring that the main body of the product is demolded first, sufficient space is created for the inclined ejector core pulling, which effectively avoids problems such as product snap-fit ​​damage, deformation or mold damage caused by improper ejection sequence, and significantly improves the product yield. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0019] In the diagram: 1. Bottom needle plate, 2. Top needle plate, 3. Sloping top, 4. Sloping top seat, 5. Pin, 6. Sloping top guide block, 7. Clear slot. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] like Figure 1-2As shown, this utility model provides a mechanism for controlling the delay of the inclined ejection, including a bottom pin plate 1, a top pin plate 2, an inclined ejector 3, an inclined ejector seat 4, a pin 5, an inclined ejector guide block 6, and a clearance groove 7.

[0023] A face needle plate 2 is provided above the bottom needle plate 1. The bottom of the inclined top seat 4 is fixed inside the bottom needle plate 1 and the face needle plate 2 by bolts.

[0024] The inclined top seat 4 is provided with a clearance groove 7 for realizing the delay stroke, and the inclined top 3 is provided with a pin 5 through which the two ends of the pin 5 can be slidably accommodated in the clearance groove 7.

[0025] The length of the clearance groove 7 is the distance that the inclined top 3 needs to delay in ejecting; the inclined top guide block 6 is installed in the inclined direction at the middle of the inclined top 3 by bolts; the inclined top 3 is set as a rotating structure with the pin 5 as the center under the action of the pin 5.

[0026] The centerline of the inclined guide block 6 is located behind the centerline of the inclined base 4.

[0027] Working principle:

[0028] When the mold enters the ejection process, the face pin plate 2 and the bottom pin plate 1 begin to eject, and drive the inclined ejector 4 to move together;

[0029] In the initial stage of ejection, due to the presence of the clearance groove 7, the pin 5 only slides in the groove. At this time, the movement of the inclined ejector seat 4 will not be transmitted to the inclined ejector 3, and the inclined ejector 3 remains stationary.

[0030] When the ejection stroke of the inclined ejector 4 reaches the distance set by the clearance groove 7, the end wall of the clearance groove will contact the pin 5. At this point, the inclined ejector 4 will start to push the inclined ejector 3 through the pin 5, so that it can complete the subsequent tilting ejection and lateral core pulling actions. During the upward movement of the inclined ejector 3, the inclined ejector guide block 6 installed on it will cooperate with the guide groove on the fixed mold side of the mold, forcing the inclined ejector 3 to generate a lateral core pulling displacement while ejecting vertically, thereby completing the subsequent tilting ejection and lateral core pulling actions.

[0031] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A mechanism for controlling the delay of the ejection of an inclined top, comprising a bottom pin plate (1), a top pin plate (2), an inclined top (3), an inclined top seat (4), a pin (5), an inclined top guide block (6), and a clearance groove (7), characterized in that: A face needle plate (2) is provided above the bottom needle plate (1), and the bottom of the inclined top seat (4) is fixed inside the bottom needle plate (1) and the face needle plate (2) by bolts. The inclined top seat (4) is provided with a clearance groove (7) for achieving a time delay stroke, and a pin (5) is provided horizontally through the inclined top (3). The two ends of the pin (5) are slidably accommodated in the clearance groove (7).

2. The mechanism for controlling the delay of the inclined jack ejection according to claim 1, characterized in that: The length of the clearance groove (7) is the distance that the inclined top (3) needs to delay before being pushed out.

3. The mechanism for controlling the delay of the inclined jack ejection according to claim 1, characterized in that: An inclined guide block (6) is bolted to the inclined end of the inclined top (3) in the inclined direction.

4. The mechanism for controlling the delay of the inclined jack ejection according to claim 3, characterized in that: The centerline of the inclined guide block (6) is located behind the centerline of the inclined base (4).

5. The mechanism for controlling the delay of the inclined jack ejection according to claim 1, characterized in that: The inclined top (3) is configured as a rotating structure with the pin (5) as the center under the action of the pin (5).

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