Injection molding submarine gate double-ejection structure
By designing the double ejection structure and conical pull rod in latent gate injection molding technology, the problem of gate waste parts flying and falling is solved, and a more efficient production process and better product quality is achieved.
Patent Information
- Application Number
- CN202420900003.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-28
AI Technical Summary
In the existing latent gate injection molding technology, gate waste parts are prone to bounce and fall off when ejected, resulting in damage to the mold mirror or product surface, affecting appearance and production efficiency.
An injection molded latent gate double ejection structure is designed, and two ejector rods parallel and perpendicular to the gate runner are arranged below the gate runner, and a conical pull rod structure is arranged at the head of the ejector rod to synchronize ejection gate waste.
Effectively prevent gate waste parts from bounced and falling, ensure that they are balanced and stressed, reduce shutdown hours, improve production efficiency, protect product and mold surfaces, and improve product quality.
Smart Images
Figure CN222590582U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gate injection molding, in particular to an injection molding latent gate double ejection structure. Background Art
[0002] At present, with the development of automotive lighting technology, the shape of lamps is becoming more and more diversified. Due to factors such as the shape and appearance requirements of automotive lighting products, the product appearance and performance requirements have been greatly improved. Therefore, some products will use point gates and latent gates for injection molding. Among them, after latent gate injection molding, gate waste will be generated at the gate and gate runner. The gate waste will usually be ejected together with the injection molded product after the mold is opened. However, the current latent gate generally has only a single ejector. Since the latent gate is close to the edge of the product, it is difficult to ensure balanced force when using a single ejector to eject the gate waste. The part of the gate waste close to the edge of the product is easily subject to resistance, causing the gate waste to be ejected at an angle, or even bounce or fall at too fast a speed, resulting in damage to the mold mirror or product surface, affecting the appearance requirements, additional downtime, and affecting production efficiency and quality. Utility Model Content
[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an injection molding latent gate double ejection structure, which can solve the problem of ejection and flying and falling of waste parts of the latent gate.
[0004] In order to solve the above technical problems, the technical solution of the utility model is:
[0005] An injection molding latent gate double ejector structure, comprising a latent gate and a gate runner formed between molds, wherein the gate runner head is connected to the latent gate, and two ejector holes are provided on the mold below the gate runner, wherein the two ejector holes are parallel and perpendicular to the gate runner, and an ejector is provided in each ejector hole;
[0006] The two ejector rods can simultaneously eject the latent gate and the gate waste parts in the gate runner while ejecting the injection molded product.
[0007] Furthermore, a conical pulling rod structure is provided at the top of each push rod.
[0008] Furthermore, a pouring gate is provided on the mold above the tail of the gate runner.
[0009] By adopting the above technical solution, the utility model has the following beneficial effects:
[0010] 1. The utility model sets two ejector pins which are parallel and perpendicular to the gate flow channel. When the injection molded product is ejected by the ejector pin, the gate waste parts can be ejected synchronously. The double ejector pins are distributed head to tail. Although the waste parts at the latent gate are subject to the resistance of the mold core, the ejector pin at the tail can also effectively increase the pulling force, so that the gate waste parts can be ejected with balanced force, and the gate waste parts are not easy to bounce or fall when ejected, which is conducive to clamping the waste parts, reducing additional downtime, improving the overall production efficiency, protecting the surface appearance of the injection molded product and the mirror surface of the mold, and improving product quality.
[0011] 2. The utility model designs a tapered pulling rod structure on the head of the ejector rod, so that the adhesion area of the waste gate parts to the head of the ejector rod during molding is larger, and there is a certain pulling force to prevent the waste gate parts from falling off and flying, so that the waste gate parts can be ensured to stay on the ejector rod after being ejected, which is convenient for the retrieval tool to clamp them smoothly. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;
[0013] Figure 2 for Figure 1 A partial enlarged schematic diagram of the structure in the middle;
[0014] Figure 3 This is a schematic diagram of the original gate waste;
[0015] Figure 4 It is a schematic diagram of the waste part of the pouring gate;
[0016] Among them, 1. latent gate; 2. gate runner; 3. ejector hole; 4. ejector; 40. tapered pull rod structure; 5. pouring gate; 6. movable mold; 7. fixed mold; 8. ejector hole; 9. original gate waste parts; 10. existing gate waste parts. DETAILED DESCRIPTION
[0017] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.
[0018] In the prior art, products with one-color injection molding often use latent gate injection molding, which will produce gate waste at the gate and runner. Figure 3 The original gate waste part 9 shown in the figure needs to be ejected when the injection molded product is ejected. However, the prior art generally uses a single ejector to eject. Since the gate inlet is close to the edge of the product, the gate waste part will encounter resistance when it is ejected. The structure of the single ejector is not very stable, and the tail of the gate waste part is easy to tilt upward. If the speed is too fast, it will bounce or fall due to inertia, causing damage to the product surface.
[0019] Therefore, reference Figure 1 ,2 As shown in Figure 4, in this embodiment, a double ejection structure of a latent gate for injection molding is provided, wherein the main body is composed of a movable mold 6 and a fixed mold 7, a latent gate 1 and a gate runner 2 are formed between the movable mold 6 and the fixed mold 7, the latent gate 1 is close to the mold core cavity, the head of the gate runner 2 is connected to the latent gate 1, and a pouring gate 5 is also provided on the fixed mold 7 above the tail of the gate runner 2, and the injection molding is performed through the pouring gate 5, and the glue is injected into the product cavity through the gate runner 2 and the latent gate 1 for molding.
[0020] After the product is injection molded, waste gate parts will also be generated at the latent gate 1 and the gate runner 2. In order to balance and eject the waste gate parts, two ejector holes 3 are opened on the movable mold 6 below the gate runner 2 in this embodiment. The two ejector holes 3 are parallel and perpendicular to the gate runner 2, and an ejector 4 is arranged in each ejector hole 3. In addition, a plurality of ejector holes 8 are also opened on the movable mold 6 below the product cavity, and an ejector is arranged in each ejector hole 3. When the mold is opened, the ejection mechanism will drive the ejector to eject the injection molded product, and at the same time, it will also drive the two ejector rods 4 to synchronously eject the waste gate parts generated in the latent gate 1 and the gate runner 2, that is, Figure 4 Since the double ejector pins 4 can be distributed head to tail, although the waste parts at the latent gate 1 are subject to the resistance of the mold core, the ejector pin 4 at the tail can also effectively increase the pulling force to form a force offset, so that the waste parts 10 at the in-situ gate can be ejected with balanced force, and thus the waste parts 10 at the in-situ gate are not easy to bounce or fall when ejected, which is conducive to clamping the waste parts, reducing additional downtime, improving the overall production efficiency, protecting the surface appearance of the injection molded product and the mirror surface of the mold, and improving product quality.
[0021] It is worth mentioning that in this embodiment, a tapered pull rod structure 40 is provided at the top of each ejector rod 4. Since the rubber material will penetrate into the two ejector rod holes 3 from the gate runner 2 during injection molding and adhere to the top of the ejector rod 4, that is, the two protrusions below the in-situ gate waste piece 10, the tapered pull rod structure 40 can make the in-situ gate waste piece 10 adhere to the head of the ejector rod 4 with a larger area during molding, and there is a certain pulling force to prevent the gate waste piece from falling off and flying, so that the gate waste piece can be guaranteed to stay on the ejector rod 4 after being ejected, which is convenient for the removal tool to smoothly clamp.
[0022] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0023] The above specific embodiments further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An injection molding latent gate double ejection structure, characterized in that: It comprises a latent gate (1) and a gate runner (2) formed between the molds, the head of the gate runner (2) is connected to the latent gate (1), and two ejector holes (3) are provided on the mold below the gate runner (2), the two ejector holes (3) are parallel and perpendicular to the gate runner (2), and each ejector hole (3) is provided with an ejector (4); The two ejector rods (4) can simultaneously eject the latent gate (1) and the gate waste parts in the gate runner (2) while ejecting the injection molded product.
2. The double ejection structure of latent gate for injection molding according to claim 1, characterized in that: A conical material pulling rod structure (40) is provided at the top of each of the push rods (4).
3. The double ejection structure of latent gate for injection molding according to claim 1, characterized in that: A pouring port (5) is provided on the mold above the tail of the pouring gate runner (2).