A delayed ejection gate structure
By designing a stable flow-guiding frustum and a flow divider structure in the injection mold, the problem of low accuracy of the hydraulic cylinder-driven delayed ejector pin movement was solved, achieving stable product ejection and avoiding deformation or damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN JINSUNWAY MOULD CO LTD
- Filing Date
- 2025-08-04
- Publication Date
- 2026-07-31
AI Technical Summary
In existing injection molds, the precision of hydraulic cylinders controlling oil flow to drive the delayed ejector pin movement is not high, which makes the product prone to deformation or damage during the ejection process.
It adopts a stable flow-guiding frustum, a concave inclined angle flow-guiding groove and a flow divider structure, and is integrally cast by mold to achieve buffering and stable flow of oil, ensuring the stability of the oil flow process, and thus stably driving the movement of the delay ejector pin.
The precision of hydraulic control has been improved, avoiding deformation or damage to the product during the ejection process and achieving a more stable delayed ejection effect.
Smart Images
Figure CN224576096U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a delayed ejection gate structure, belonging to the field of mold technology. Background Technology
[0002] Delayed ejector pins (also known as delayed ejection mechanisms) are special ejection devices in injection molds, used to eject the molded product after a certain period of time following mold opening. This mechanism is typically used for demolding complex-shaped or thin-walled products to prevent deformation or damage during ejection. Delayed ejector pins employing hydraulic delay technology use a hydraulic cylinder to control the flow of oil, delaying the pin's movement. In contrast, traditional ejector pins are simple cylindrical structures, and the precision of oil-driven pin movement control is not high. Utility Model Content
[0003] The purpose of this invention is to provide a delayed ejection gate structure to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a delayed ejection gate structure, including a submersible gate, a floating slider, and a delayed ejector pin. The mold is integrally cast with a submersible gate, which is located at the upper end of the delayed ejector pin of the fixed mold. A floating slider is positioned on the right side of the mold.
[0005] Preferably, the delay ejector pin rod is positioned and welded with a stable flow-guiding frustum.
[0006] Preferably, the stable flow guiding frustum consists of a positioning frustum, a concave angled flow guiding groove, and a flow divider. The inclined end face of the positioning frustum is uniformly spaced and formed with concave angled flow guiding grooves, and the flow divider is installed in the lower end of the concave angled flow guiding groove by positioning welding.
[0007] Preferably, the flow divider consists of a flow divider plate and flow stabilizing holes, with the flow divider plate having flow stabilizing holes machined at even intervals.
[0008] Compared with the prior art, the beneficial effects of this utility model are: The stabilizing guide frustum consists of a positioning frustum, a concave angled guide channel, and a flow divider. The flow divider consists of a flow divider plate and stabilizing holes. The flow divider plate is evenly spaced and machined with stabilizing holes. When the oil moves to the position of the stabilizing guide frustum, the positioning frustum acts as a buffer for the oil, and the concave angled guide channel guides the oil flow, enabling the oil to quickly fill the cavity. The flow divider plate and stabilizing holes of the flow divider ensure the stability of the oil flow process, achieving stable drive. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the delayed ejection gate structure of this utility model; Figure 2 This is a schematic diagram of the installation structure of the floating slider of this utility model; Figure 3 This is a schematic diagram of the structure of the delay ejector pin of this utility model; Figure 4 This is a schematic diagram of the structure of the stable flow-guiding frustum of this utility model; Figure 5 This is a schematic diagram of the structure of the flow divider of this utility model.
[0010] In the diagram: 1. Submersible gate, 2. Floating slider, 3. Delayed ejector pin, 4. Stabilizing guide frustum, 5. Positioning frustum, 6. Concave angled guide groove, 7. Flow divider, 8. Flow divider plate, 9. Stabilizing flow hole. Detailed Implementation
[0011] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0012] like Figures 1-5 As shown, a delayed ejection gate structure includes a subgate 1, a floating slider 2, and a delayed ejector pin 3. The mold is integrally cast with a subgate. The subgate 1 is located at the upper end of the delayed ejector pin 3 of the fixed mold. The floating slider 2 is positioned on the right side of the mold.
[0013] The delay pin 3 rod body is positioned and welded with a stable flow guiding frustum 4.
[0014] The stabilizing guide frustum 4 consists of a positioning frustum 5, a concave angled guide groove 6, and a flow divider 7. The positioning frustum 5 has concave angled guide grooves 6 evenly spaced on its inclined end face. The flow divider 7 is installed and positioned by welding at the lower end of the concave angled guide groove 6. When the oil moves to the position of the stabilizing guide frustum 4, the positioning frustum 5 acts as an oil buffer, and the concave angled guide groove 6 guides the oil flow, so as to realize the rapid filling of the cavity with oil.
[0015] The flow divider 7 consists of a flow divider plate 8 and a flow stabilizing hole 9. The flow divider plate 8 is formed with evenly spaced flow stabilizing holes 9. The flow divider plate 8 and the flow stabilizing holes 9 ensure the stability of the oil flow process and achieve stable drive.
[0016] Specific usage: A delayed ejection gate-breaking structure. This device is designed for delayed ejection and optimization of delayed structures in molds. During the ejection process, the floating slider moves up and down, and the delayed ejector pin does not eject during the delay period, thereby detaching the gate from the floating slider. The delayed ejection gate-breaking function adopts a needle hydraulic delay technology solution for the delayed ejector pin. The hydraulic cylinder drives the delayed ejector pin to move by controlling the flow of oil. The oil moves to the position of the stable guide frustum, where the positioning frustum acts as a buffer for the oil. The concave angled guide channel guides the oil, enabling the oil to quickly fill the cavity. The flow divider plate and the stable flow hole ensure the stability of the oil flow process, achieving stable drive.
[0017] The above description is a preferred embodiment of the present utility model. For those skilled in the art, any changes, modifications, substitutions and variations made to the implementation methods without departing from the principles and spirit of the present utility model, based on the teachings of the present utility model, still fall within the protection scope of the present utility model.
Claims
1. A delayed ejection gate structure, characterized in that, The mold includes a submersible gate (1), a floating slider (2), and a delayed ejector pin (3). The mold is integrally cast with a submersible gate. The submersible gate (1) is located at the upper end of the delayed ejector pin (3) of the fixed mold. The floating slider (2) is positioned on the right side of the mold. The delayed ejector pin (3) is positioned and welded with a stable flow guiding frustum (4). The stable flow guiding frustum (4) is composed of a positioning frustum (5), a concave angled flow guiding groove (6), and a flow divider (7). The angled end face of the positioning frustum (5) is uniformly spaced and formed with a concave angled flow guiding groove (6). The lower end of the concave angled flow guiding groove (6) is internally positioned and welded with a flow divider (7). The flow divider (7) is composed of a flow divider plate (8) and a stable flow hole (9). The flow divider plate (8) is uniformly spaced and formed with stable flow holes (9).