Secondary ejection automatic material cutting structure

Abstract

The utility model belongs to the technical field of injection mold demolding, and particularly relates to a secondary ejection automatic material cutting structure which comprises an upper sealing plate, a delay ejection mechanism, a primary ejection mechanism and an injection molding mechanism, the delay ejection mechanism comprises an ejector pin bottom plate, a movable cavity is formed in the ejector pin bottom plate, and the primary ejection mechanism is arranged in the movable cavity. Delay thimbles are movably mounted in the movable cavities, and two groups of movable cavities and two groups of delay thimbles are arranged. Through the design of the secondary ejection mechanism, the secondary ejection mechanism can perform ejection step by step, so that the force applied by the ejector pin during ejection each time is reduced, and the step-by-step ejection mode is beneficial to avoiding the defects, such as deformation, strain or cracking, of the product in the ejection process, so that the concentricity and the planeness of the product meet the requirements. Meanwhile, by means of the design of the disc-shaped pouring gate, the product is ejected out through joint cooperation of the delay ejector pin and the limiting ring, and the product is disengaged.

Description

Technical Field

[0001] This utility model relates to the field of injection mold demolding technology, specifically to a secondary ejection automatic material cutting structure. Background Technology

[0002] An ejection and material-cutting mechanism is a device used in mold production to eject molded parts from the mold. The design and application of this mechanism are of great significance for improving production efficiency, ensuring product quality, and reducing production costs.

[0003] Traditional mold ejection mechanisms typically employ a single ejection method, such as mechanical or pneumatic ejection mechanisms. While these mechanisms can achieve basic ejection functions, they often have limitations when faced with complex mold structures and diverse production needs. For example, mechanical ejection mechanisms may suffer from high maintenance costs and noticeable ejection marks; pneumatic ejection mechanisms may be affected by the stability of the air supply, leading to unstable ejection actions.

[0004] The conventional approach in existing technologies is to use submerged glue or two-point side gates, but this cannot meet the requirements for concentricity and flatness. It requires a secondary processing process of shaping fixtures and oven baking, which is complex and cannot guarantee product quality. Therefore, there is an urgent need to improve the automatic material cutting structure of secondary ejection to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a secondary ejection automatic material cutting structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a secondary ejection automatic material cutting structure, comprising an upper sealing plate, an injection port located in the middle of the upper sealing plate, a female template movably mounted on the left side of the upper sealing plate, a male template movably mounted on the left side of the female template, two sets of fixing plates fixedly mounted on the left side of the male template, an ejector pin base plate movably mounted between the fixing plates, a lower sealing plate fixedly mounted on the left side of the ejector pin base plate, and a support column fixedly mounted at the bottom of the fixing plates; the secondary ejection automatic material cutting structure comprises a delayed ejection mechanism, a primary ejection mechanism, and an injection mechanism, the delayed ejection mechanism comprising an ejector pin base plate, a movable cavity provided within the ejector pin base plate, a delayed ejector pin movably mounted within the movable cavity, and two sets of the movable cavity and the delayed ejector pin.

[0007] Preferably, a first ejector pin is movably mounted on the left side of the delay ejector pin, the right side of the delay ejector pin is connected to the air pump pipe, a limit ring is fixedly mounted on the left end of the first ejector pin, and an ejector rod is fixedly mounted on the front end of the limit ring.

[0008] Preferably, the initial ejection mechanism includes an ejector base plate, on which multiple sets of ejector pins are fixedly installed. The ejector base plate is provided with four sets of guide posts, on which springs are movably installed. The two ends of the springs are fixedly installed between the male template and the ejector base plate.

[0009] Preferably, the injection molding mechanism includes a male mold plate, a male mold core is fixedly installed inside the male mold plate, a female mold core is fixedly installed on the left side of the male mold core, and a molding cavity is left between the male mold core and the female mold core.

[0010] Preferably, a nozzle is fixedly installed inside the mother mold, and the end of the nozzle is aligned with the forming cavity between the male mold core and the female mold core. The nozzle is provided in two sets.

[0011] Preferably, a cutting insert is fixedly installed inside the male mold core, and the ejector pin passes through the cutting insert. The product is located in the molding cavity between the male mold core and the female mold core.

[0012] Preferably, the cutting insert contacts the product, the bottom surface of the product contacts the ejector pin, the product has an ejection cavity at its center, the limiting ring is the same size as the ejection cavity, and the ejection cavity is a disc-shaped design.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This secondary ejection automatic material cutting structure, through the design of the secondary ejection mechanism, can eject in stages, thereby reducing the force applied by the ejector pin each time. This staged ejection method helps to avoid defects such as deformation, tearing or cracking of the product during the ejection process.

[0015] 2. This secondary ejection automatic material cutting structure, through the inverted design inside the ejection cavity, makes the limiting ring in front of the ejector pin abut against the ejection cavity, giving it sufficient force to pull off the disc-shaped gate, thereby achieving automatic material cutting and ensuring the quality of the product. Attached Figure Description

[0016] Figure 1 This is one of the three-dimensional schematic diagrams of the present utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the ejection mechanism of this utility model;

[0019] Figure 4 This is a schematic diagram of the state after one ejection of the present invention;

[0020] Figure 5 This is a schematic diagram of the state after the secondary ejection of this utility model.

[0021] In the diagram: 1. Upper sealing plate, 2. Injection port, 3. Female mold plate, 4. Male mold plate, 5. Fixing plate, 6. Ejector pin base plate, 7. Lower sealing plate, 8. Support column, 201. Spring, 202. Guide column, 203. Male mold core, 204. Female mold core, 205. Sprue, 301. Cutting insert, 302. Product, 303. Ejector rod, 304. Limiting ring, 305. Ejector pin one, 306. Ejector pin two, 307. Ejection cavity, 308. Movable cavity, 309. Delayed ejector pin. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1:

[0024] Please see Figures 1-4 This utility model provides a technical solution: a secondary ejection automatic material cutting structure, including an upper sealing plate 1, characterized in that: an injection port 2 is provided in the middle of the upper sealing plate 1, a female template 3 is movably installed on the left side of the upper sealing plate 1, a male template 4 is movably installed on the left side of the female template 3, two sets of fixing plates 5 are fixedly installed on the left side of the male template 4, an ejector pin base plate 6 is movably installed between the fixing plates 5, a lower sealing plate 7 is fixedly installed on the left side of the ejector pin base plate 6, and a support column 8 is fixedly installed at the bottom of the fixing plates 5; the secondary ejection automatic material cutting structure includes a delayed ejection mechanism and an injection mechanism, the delayed ejection mechanism includes an ejector pin base plate 6, an active cavity 308 is provided in the ejector pin base plate 6, a delayed ejector pin 309 is movably installed in the active cavity 308, and two sets of active cavity 308 and delayed ejector pin 309 are provided.

[0025] A first ejector pin 305 is movably installed on the left side of the delay ejector pin 309. The right side of the delay ejector pin 309 is connected to the air pump pipe. A limit ring 304 is fixedly installed on the left end of the first ejector pin 305. An ejector rod 303 is fixedly installed on the front end of the limit ring 304.

[0026] After the product is formed, the product 302 is separated from the male mold core 203 by the initial ejection demolding. The delayed ejector pin 309 is controlled to move forward in the movable cavity 308, which in turn pushes the ejector pin 305 to move, so that the limiting ring 304 contacts the end face of the ejection cavity 307 at the bottom of the product 302. With the use of the disc design, the force of the ejector pin 305 is sufficient to pull the product off, thus breaking the material head and realizing automatic material cutting.

[0027] Example 2:

[0028] Please see Figures 4-5 This utility model provides a technical solution: a secondary ejection automatic material cutting structure, wherein the primary ejection mechanism includes an ejector base plate 6, multiple sets of ejector pins 306 are fixedly installed on the ejector base plate 6, four sets of guide posts 202 are provided on the ejector base plate 6, and springs 201 are movably installed on the guide posts 202, with both ends of the springs 201 fixedly installed between the male template 4 and the ejector base plate 6.

[0029] The injection molding mechanism includes a male mold plate 4, a male mold core 203 is fixedly installed inside the male mold plate 4, a female mold core 204 is fixedly installed on the left side of the male mold core 203, and a molding cavity is left between the male mold core 203 and the female mold core 204.

[0030] A nozzle 205 is fixedly installed inside the mother mold 3. The end of the nozzle 205 is connected to the molding cavity between the male mold core 203 and the female mold core 204. There are two sets of nozzles 205.

[0031] A cutting insert 301 is fixedly installed inside the male mold core 203. An ejector pin 305 passes through the cutting insert 301. The product 302 is located in the molding cavity between the male mold core 203 and the female mold core 204.

[0032] The cut insert 301 contacts the product 302, the bottom surface of the product 302 contacts the ejector pin 306, and the center of the product 302 is provided with an ejection cavity 307. The limiting ring 304 is the same size as the ejection cavity 307.

[0033] Plastic is injected into the molding cavities of the male mold core 203 and the female mold core 204 through the nozzle 205. After molding, the ejector plate 6 is activated to control the ejector pin 306 fixedly installed on the ejector plate 6 to eject the product, completing the initial ejection of the product. At this time, the material head is not disconnected.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A secondary ejection automatic material cutting structure, comprising an upper sealing plate (1), characterized in that: The upper sealing plate (1) has an injection port (2) in the middle. A female template (3) is movably installed on the left side of the upper sealing plate (1). A male template (4) is movably installed on the left side of the female template (3). Two sets of fixing plates (5) are fixedly installed on the left side of the male template (4). A pin base plate (6) is movably installed between the fixing plates (5). A lower sealing plate (7) is fixedly installed on the left side of the pin base plate (6). A support column (8) is fixedly installed at the bottom of the fixing plate (5). The secondary ejection automatic material cutting structure includes a delayed ejection mechanism, a primary ejection mechanism, and an injection molding mechanism. The delayed ejection mechanism includes an ejector base plate (6), and the ejector base plate (6) is provided with a movable cavity (308). A delayed ejector pin (309) is movably installed in the movable cavity (308). The movable cavity (308) and the delayed ejector pin (309) are provided in two sets.

2. The automatic material cutting structure for secondary ejection according to claim 1, characterized in that: The left side of the delay ejector pin (309) is movably mounted with ejector pin one (305), the right side of the delay ejector pin (309) is connected to the air pump pipe, the left end of ejector pin one (305) is fixedly mounted with a limit ring (304), and the front end of the limit ring (304) is fixedly mounted with an ejector rod (303).

3. The automatic material cutting structure for secondary ejection according to claim 2, characterized in that: The initial ejection mechanism includes an ejector base plate (6), on which multiple sets of ejector pins (306) are fixedly installed. The ejector base plate (6) is provided with four sets of guide posts (202), on which springs (201) are movably installed. The two ends of the springs (201) are fixedly installed between the male template (4) and the ejector base plate (6).

4. The automatic material cutting structure for secondary ejection according to claim 3, characterized in that: The injection molding mechanism includes a male mold plate (4), a male mold core (203) is fixedly installed inside the male mold plate (4), a female mold core (204) is fixedly installed on the left side of the male mold core (203), and a molding cavity is left between the male mold core (203) and the female mold core (204).

5. The automatic material cutting structure for secondary ejection according to claim 4, characterized in that: The mother template (3) is fixedly installed with a nozzle (205). The end of the nozzle (205) is connected to the molding cavity between the male mold core (203) and the female mold core (204). The nozzle (205) is provided in two sets.

6. The automatic material cutting structure for secondary ejection according to claim 5, characterized in that: A cutting insert (301) is fixedly installed inside the male mold core (203), and the ejector pin (305) passes through the cutting insert (301). The product (302) is located in the molding cavity between the male mold core (203) and the female mold core (204).

7. The automatic material cutting structure for secondary ejection according to claim 6, characterized in that: The cutting insert (301) contacts the product (302), the bottom surface of the product (302) contacts the ejector pin (306), the product (302) has an ejection cavity (307) at its center, and the limiting ring (304) is the same size as the ejection cavity (307).

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