Ejection structure of injection mold

Abstract

The utility model relates to a slanted ejection strong stripping structure of injection mould, including slanted ejection head, slanted ejection rod, still including slanted ejection strong stripping insert block, spring, be equipped with removal cavity in slanted ejection head, be equipped with first step and second step in removal cavity, slanted ejection strong stripping insert block is located in removal cavity and slides, slanted ejection strong stripping insert block includes perpendicular insert block rod and baffle, spring is covered on insert block rod, and both ends of spring respectively with baffle and second step are in contact, and the end of insert block rod is equipped with the forming groove for the reverse buckle forming, and the reverse buckle sticks to insert block rod when injection, and slanted ejection head is ejected and moves obliquely up when, and the core-pulling of slanted ejection strong stripping insert block is transversely moved relative to slanted ejection strong stripping insert block, and spring is compressed, when first step and baffle contact, slanted ejection head drives slanted ejection strong stripping insert block synchronous movement, make slanted ejection strong stripping insert block and product reverse buckle forced separation, complete core-pulling. The utility model discloses compact and clever structure, simple operation, prevent product reverse buckle sticking to slanted ejection strong stripping insert block through secondary core-pulling process, and the space is small, guarantees product smooth stripping.

Description

Technical Field

[0001] This utility model relates to a slanted ejector structure for injection molds, and belongs to the field of injection mold technology. Background Technology

[0002] During injection molding, the undercuts created by mold parting are typically formed and demolded using an ejector mechanism within the mold. The top of the ejector mechanism has a molding area for the molded product. However, if the molding area at the top of the ejector is large, it can cause excessive adhesion between the molded product and the ejector pins. During demolding, the molded product is often laterally displaced by the ejector pins, which can result in the undercut not completely detaching from the ejector pins, leading to defects. To address this issue, locating ejector pins are typically added to prevent lateral displacement during demolding. However, these pins occupy significant space. If the molded product's structure limits the space available for these pins, normal injection molding may be impossible, hindering the process. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a space-saving inclined ejector structure for injection molds.

[0004] To achieve this objective, the technical solution adopted by this utility model is:

[0005] The inclined ejector force-release structure of the injection mold includes an inclined ejector head, an inclined ejector rod, an inclined ejector force-release insert, and a spring. The inclined ejector head has a movable cavity with a first step and a second step. The inclined ejector force-release insert is slidably disposed in the movable cavity. The inclined ejector force-release insert includes a mutually perpendicular insert rod and a baffle. The spring is sleeved on the insert rod, and both ends of the spring abut against the baffle and the second step, respectively. The end of the insert rod has a forming groove for undercutting. During injection molding, the undercut sticks to the insert rod. When the inclined ejector head is ejected and moves obliquely upward, it moves laterally relative to the inclined ejector force-release insert to pull the core, and the spring is compressed. When the first step contacts the baffle, the inclined ejector head drives the inclined ejector force-release insert to move synchronously, forcibly separating the inclined ejector force-release insert from the undercut of the product, thus completing the core pulling.

[0006] As a further optimization of the above technical solution: the moving cavity includes a first moving cavity, a second moving cavity and a third moving cavity in sequence. The height h1 of the first moving cavity is greater than the height h2 of the second moving cavity, the height h2 of the second moving cavity is greater than the height h3 of the third moving cavity, a first step is formed between the first moving cavity and the second moving cavity, a second step is formed between the second moving cavity and the third moving cavity, the baffle is located in the first moving cavity, and the end of the insert rod is located in the third moving cavity.

[0007] As a further optimization of the above technical solution: the inclined top head is also provided with an installation cavity that connects the first moving cavity and the external environment. The height of the installation cavity is greater than the height h1 of the first moving cavity. An insert pressure plate is installed in the installation cavity. When the spring is in the extended state, the baffle is in contact with the insert pressure plate.

[0008] Compared with existing technologies, this utility model has a compact and ingenious structure and is easy to operate. The adhesive force between the undercut and the insert rod allows the angled ejector head to pull the core separately first. Then, the contact between the first step and the baffle causes the angled ejector head to drive the angled ejector forcefully release insert to move synchronously, so that the angled ejector forcefully release insert is forcibly separated from the product undercut. The secondary core pulling process prevents the product undercut from sticking to the angled ejector forcefully release insert. There is no need to set up positioning ejector pins or other ejection structures, which occupies little space, ensures smooth demolding of the product, effectively ensures normal production of injection molding, and guarantees processing efficiency and product quality. Attached Figure Description

[0009] Figure 1 This is a cross-sectional structural diagram of the injection molding process of this utility model.

[0010] Figure 2 yes Figure 1 A magnified structural diagram of point A in the middle.

[0011] Figure 3 This is a partial cross-sectional structural diagram of the core-pulling process of this utility model. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. For example... Figure 1-3As shown, the inclined ejector force release structure of the injection mold includes an inclined ejector head 1, an inclined ejector rod 2, an inclined ejector force release insert 3, and a spring 5. The inclined ejector head 1 has a movable cavity, within which are a first step 14 and a second step 15. The inclined ejector force release insert 3 is slidably disposed within the movable cavity. The inclined ejector force release insert 3 includes mutually perpendicular insert rods 31 and baffles 32, and the inclined ejector force release insert 3 is approximately T-shaped. The spring 5 is sleeved on the insert rod 31, and its two ends respectively abut against the baffles 32 and the second step 15. The end of the insert rod 31 is provided with a molding groove 33 for undercut molding. During injection molding, the undercut adheres to the insert rod 31. Due to the large adhesive force between the undercut and the insert rod 31, the insert rod 31 remains fixed when the inclined ejector head 1 is pushed out and moves obliquely upward. This allows the inclined ejector head 1 to move horizontally relative to the inclined ejector forcefully release insert 3 for core pulling, and the spring 5 is compressed. When the first step 14 contacts the baffle 32, the inclined ejector head 1 drives the inclined ejector forcefully release insert 3 to move synchronously, forcibly separating the inclined ejector forcefully release insert 3 from the undercut of the product, completing the core pulling. Figure 3 As shown. After the core is pulled out, the spring 5 releases its force, causing the inclined top force-release insert 3 to return to its original position. Figure 1 The present invention features a compact and ingenious structure, simple operation, and a single core-pulling mechanism. The adhesive force between the undercut and the insert rod 31 allows the angled ejector head 1 to pull the core separately first. Then, the contact between the first step 14 and the baffle 32 causes the angled ejector head 1 to move synchronously with the angled ejector force-release insert 3, forcibly separating the angled ejector force-release insert 3 from the product undercut. This secondary core-pulling process prevents the product undercut from sticking to the angled ejector force-release insert 3. It eliminates the need for ejector pins or other ejection structures, occupies little space, ensures smooth product demolding, effectively guarantees normal injection molding production, and ensures processing efficiency and product quality.

[0013] In the above technical solution: the moving cavity sequentially includes a first moving cavity 11, a second moving cavity 12, and a third moving cavity 13. The height h1 of the first moving cavity 11 is greater than the height h2 of the second moving cavity 12, and the height h2 of the second moving cavity 12 is greater than the height h3 of the third moving cavity 13. A first step 14 is formed between the first moving cavity 11 and the second moving cavity 12, and a second step 15 is formed between the second moving cavity 12 and the third moving cavity 13. The baffle 32 is located in the first moving cavity 11, and the end of the insert rod 31 is located in the third moving cavity 13.

[0014] In the above technical solution: the inclined head 1 is further provided with an installation cavity that connects the first moving cavity 11 and the external environment. The height of the installation cavity is greater than the height h1 of the first moving cavity 11. An insert pressure plate 4 is installed in the installation cavity. When the spring 5 is in the extended state, the baffle 32 contacts the insert pressure plate 4. After long-term use, the elasticity of the spring 5 may decrease, or the forming groove 33 on the inclined head force release insert 3 may wear, resulting in burrs on the formed undercut. At this time, it is necessary to disassemble and replace the spring 5 or the inclined head force release insert 3. The insert pressure plate 4 is removed so that the inclined head force release insert 3 and the spring 5 can be separated from the inclined head 1 through the installation cavity. The installation cavity facilitates the disassembly and replacement of the inclined head force release insert 3 and the spring 5, and the insert pressure plate 4 limits the movement of the inclined head force release insert 3.

[0015] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should fall within the protection scope of this utility model.

Claims

1. A slanted ejector force release structure for an injection mold, comprising a slanted ejector head (1) and a slanted ejector rod (2), characterized in that... It also includes a sloping top force-release insert (3) and a spring (5). The sloping top (1) has a moving cavity, and the moving cavity has a first step (14) and a second step (15). The sloping top force-release insert (3) is slidably disposed in the moving cavity. The sloping top force-release insert (3) includes a insert rod (31) and a baffle (32) that are perpendicular to each other. The spring (5) is sleeved on the insert rod (31), and the two ends of the spring (5) abut against the baffle (32) and the second step (15) respectively. The end of the insert rod (31) is provided with a molding groove (33) for undercut molding. During injection molding, the insert rod (31) is stuck to the undercut. When the inclined top head (1) is pushed out and moves obliquely upward, it moves horizontally relative to the inclined top force-release insert (3) to pull the core. The spring (5) is compressed. When the first step (14) contacts the baffle (32), the inclined top head (1) drives the inclined top force-release insert (3) to move synchronously, so that the inclined top force-release insert (3) is forcibly separated from the undercut of the product, and the core is pulled.

2. The inclined ejector structure of the injection mold according to claim 1, characterized in that... The movable cavity includes a first movable cavity (11), a second movable cavity (12), and a third movable cavity (13) in sequence. The height h1 of the first movable cavity (11) is greater than the height h2 of the second movable cavity (12), and the height h2 of the second movable cavity (12) is greater than the height h3 of the third movable cavity (13). A first step (14) is formed between the first movable cavity (11) and the second movable cavity (12), and a second step (15) is formed between the second movable cavity (12) and the third movable cavity (13). The baffle (32) is located in the first movable cavity (11), and the end of the insert rod (31) is located in the third movable cavity (13).

3. The inclined ejector structure of the injection mold according to claim 2, characterized in that... The inclined head (1) is also provided with an installation cavity that connects the first moving cavity (11) and the external environment. The height of the installation cavity is greater than the height h1 of the first moving cavity (11). An insert pressure plate (4) is installed in the installation cavity. When the spring (5) is in the extended state, the baffle (32) is in contact with the insert pressure plate (4).

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