Mold ejection structure for preventing product from being damaged

Abstract

The utility model relates to mould technical field, concretely is a kind of mould ejection structure for preventing product to be pulled and hurt, including ejection drive unit, balanced ejection unit, flexible contact unit and mounting seat, ejection cylinder drives drive plate, guide rod ensures linear motion;Ejection rod lower half section rotates and is set on ejection rod upper half section, and cooperation adjusting screw pipe realizes ejection force dynamic balance;Silica gel ejection pad integrated anti-skid line provides soft contact, spherical positioning pin is accurately positioned in the linkage board buffer groove by spring buffer, effectively absorbs impact. The structure reduces product pulling and hurting rate, improves product pass rate, reduces mould wear, significantly reduces scrap rate and maintenance cost, is applicable to high requirement manufacturing scene such as precision injection molding, improves production efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a mold ejection structure that prevents product damage. Background Technology

[0002] In the mold manufacturing and injection molding industry, the product ejection process is a critical link affecting the quality of the finished product. Traditional mold ejection structures often use rigid ejector pins that directly contact the product, which has significant drawbacks: uneven ejection force distribution leads to localized stress concentration, easily causing product tearing, deformation, or breakage; excessive ejection impact force, especially on high-speed production lines, generates instantaneous high stress between the product and the ejection components, resulting in a tearing rate of over 2.5%. Existing improvement solutions, such as adding spring buffers or using soft ejection pads, have limited buffering effects due to the lack of a dynamic force balancing mechanism, and soft materials are prone to wear and have a short lifespan. Furthermore, traditional locating pins are mostly planar structures, unable to adapt to product deformation, and are prone to displacement during ejection, further exacerbating the risk of tearing.

[0003] More importantly, existing ejection systems do not consider the diversity of product shapes and the dynamic characteristics of the ejection process. For example, complex curved surface products experience uneven force distribution during ejection, and rigid ejection rods cannot adaptively adjust, leading to an imbalance in contact pressure distribution. Furthermore, the lack of multi-stage buffering design fails to effectively attenuate ejection impact energy. While some patents introduce a dual ejection rod structure, the connection method is rigid, failing to eliminate axial offset, and the buffering elements are prone to failure. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a mold ejection structure to prevent product tearing.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: A mold ejection structure for preventing product tearing, comprising an ejection drive unit, a balanced ejection unit, a flexible contact unit, and a mounting base; the ejection drive unit, the balanced ejection unit, and the buffer adjustment unit are all mounted on the mounting base; the flexible contact unit is fixed to the end of the balanced ejection unit; the mounting base is a rectangular plate with several guide holes; the ejection drive unit includes an ejection cylinder, a drive plate, and several guide rods; the balanced ejection unit includes several ejection rods, a linkage plate, an adjusting screw, and a buffer tube; the flexible contact unit includes a silicone ejection pad, anti-slip texture, and a positioning pin.

[0008] Preferably, the ejector cylinder is fixed to the outside of the mounting base, the output end of the ejector cylinder passes through the mounting base and is connected to the drive plate, the guide rod is fixed to the four corners of the drive plate, and the guide rod passes through the guide hole of the mounting base.

[0009] More preferably, the ejector rod has a two-section structure, and the lower half of the ejector rod is rotatably sleeved on the upper half of the ejector rod. The upper half of the ejector rod is fixedly connected to the linkage plate by a screw structure, and the lower half of the ejector rod is sleeved with an adjusting screw tube by a threaded structure. The buffer tube is located at the bottom of the drive plate, and the adjusting screw tube passes through the drive plate and is slidably installed in the buffer tube by an elastic element.

[0010] Preferably, the ejector pad is attached to one side of the linkage plate, and the anti-slip texture is provided on the surface of the ejector pad.

[0011] Preferably, the linkage plate is provided with a plurality of buffer grooves, and the positioning pin is slidably installed in the buffer grooves through a buffer component.

[0012] More preferably, the buffer and elastic elements adopt a spring structure.

[0013] Preferably, the top of the positioning pin has a spherical structure.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a mold ejection structure to prevent product tearing, which has the following beneficial effects:

[0016] This technical solution employs a balanced ejection unit with a dual-segment rotating ejection rod structure, combined with an adjusting screw and buffer tube, to achieve uniform distribution and dynamic adjustment of ejection force, eliminating localized stress concentration. The flexible contact unit uses a silicone ejection pad with integrated anti-slip texture, providing a high-friction, low-rigidity, soft contact surface to prevent scratches or deformation of the product surface. The buffer adjustment unit absorbs ejection impact energy through a spring-type elastic element, attenuating the instantaneous impact force by more than 50% to prevent the product from being pulled and broken. The spherical structure of the positioning pin ensures precise positioning, and the linkage plate buffer groove design further optimizes stability. The guide rod structure ensures linear ejection motion, avoiding localized stress caused by misalignment. This device reduces product tearing rate, improves product qualification rate, reduces mold wear, significantly reduces scrap rate and maintenance costs, and is suitable for high-requirement manufacturing scenarios such as precision injection molding and stamping, effectively improving production efficiency and product quality, and meeting the high-reliability ejection requirements of modern manufacturing. Attached Figure Description

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

[0018] Figure 2This is a top view of the structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the buffer tube and linkage plate of this utility model;

[0020] In the diagram: 1. Mounting base; 2. Ejector cylinder; 3. Drive plate; 4. Guide rod; 5. Linkage plate; 6. Buffer tube; 7. Ejector rod; 8. Adjusting screw; 9. Ejector pad; 10. Positioning pin; 11. Elastic element; 12. Buffer element. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-3 This utility model discloses a mold ejection structure for preventing product tearing, comprising an ejection drive unit, a balanced ejection unit, a flexible contact unit, and a mounting base 1. The ejection drive unit, the balanced ejection unit, and the buffer adjustment unit are all mounted on the mounting base 1. The flexible contact unit is fixed to the end of the balanced ejection unit. The mounting base 1 is a rectangular plate with several guide holes. The ejection drive unit includes an ejection cylinder 2, a drive plate 3, and several guide rods 4. The balanced ejection unit includes several ejection rods 7, a linkage plate 5, an adjusting screw tube 8, and a buffer tube 6. The flexible contact unit includes a silicone ejection pad 9, anti-slip texture, and a positioning pin 10.

[0023] This technical solution is based on the core logic of precise guidance, balanced force application, flexible contact, and multi-level buffering. The ejection drive unit provides stable power, and the guide rod 4 ensures accurate ejection trajectory. The balanced ejection unit achieves uniform force distribution at multiple points through an adjustable structure, avoiding local stress concentration. The flexible contact unit uses a silicone ejection pad 9 to adhere to the product, and works with the buffer component to absorb the ejection impact. The positioning pin 10 precisely aligns with the product, ultimately achieving product ejection without damage or deformation, solving the pain points of traditional ejection structures such as easy tearing and uneven force distribution.

[0024] Mounting base 1 is a rectangular plate with several guide holes; ejector cylinder 2 is fixed to the outside of mounting base 1, and its output end passes through mounting base 1 and connects to drive plate 3; guide rod 4 is fixed to the four corners of drive plate 3 and passes through the guide holes of mounting base 1.

[0025] Mounting base 1 provides a rigid mounting reference for each unit to ensure structural assembly accuracy; guide hole provides a directional channel for guide rod 4 to prevent drive plate 3 from shifting during ejection.

[0026] The ejector cylinder 2 outputs axial thrust, which drives the drive plate 3 to move the subsequent ejector components synchronously; four guide rods 4 are distributed along the four corners, and cooperate with the guide holes to restrict the drive plate 3 to move only along the axial direction, ensuring that the ejection trajectory is straight and avoiding product stress deviation that could cause damage.

[0027] The ejector rod 7 has a double-segment rotating sleeve structure. The upper half is fixed to the linkage plate 5 with screws, and the lower half is threaded to the adjusting screw tube 8. The adjusting screw tube 8 passes through the drive plate 3 and is slidably installed in the buffer tube 6 through the spring component.

[0028] Rotate the lower half of the ejector rod 7 and adjust the extension length of the adjusting screw tube 8 through the threaded connection, thereby fine-tuning the overall length of the ejector rod 7 to ensure that all ejector rods 7 contact the product synchronously, achieve multi-point uniform force application, and avoid excessive local pressure that could damage the product.

[0029] During ejection, the spring is compressed to absorb the ejection impact force and reduce rigid collision; the buffer tube 6 provides a sliding guide for the adjusting screw tube 8, which, together with the spring, forms a buffer mechanism to further alleviate the stress impact at the moment of ejection.

[0030] The silicone ejector pad 9 is attached to one side of the linkage plate 5, and the surface is provided with anti-slip texture; the linkage plate 5 is provided with a buffer groove, and the spherical positioning pin 10 is slidably installed in the buffer groove through a spring component.

[0031] The silicone material has good elasticity, and the ejector pad 9 flexibly fits the product surface, increasing the contact area, dispersing local stress, and avoiding tearing and indentation caused by rigid contact; the low roughness design of the ejector pad 9 further reduces the risk of scratches.

[0032] The anti-slip texture increases the friction between the ejector pad 9 and the product, preventing slippage and displacement during ejection;

[0033] The spherical positioning pin 10 is aligned with the product to achieve precise alignment of the ejection position and avoid offset and damage; the spring at the bottom of the positioning pin 10 can buffer the impact force during positioning, while adapting to the slight position deviation of the product and improving the positioning error tolerance.

[0034] Detailed Workflow

[0035] Step 1: Structural pre-assembly and parameter debugging

[0036] Installation and fixing: Fix the mounting base 1 to the preset position of the moving mold, assemble the ejection drive unit, the equal ejection unit and the flexible contact unit to ensure that the guide rod 4 slides smoothly and the ejection components are not stuck.

[0037] Parameter adjustment: According to the product size and shape, rotate the lower half of the ejector rod 7, and finely adjust the length of each ejector rod 7 by adjusting the screw tube 8, so that the plane of the ejector pad 9 is parallel to the product surface; adjust the extension length of the positioning pin 10 by adjusting the spring to ensure that it is compatible with the product positioning hole.

[0038] Step 2: Positioning and Alignment After Product Molding

[0039] Product forming: Before the mold opens, the product is formed in the mold cavity; the ejector cylinder 2 is in the reset state, and the positioning pin 10 is kept extended under the action of the spring.

[0040] Precise positioning: After the mold opens to the preset position, the ejector cylinder 2 is ready to start, and the spherical positioning pin 10 precisely fits the product to complete the ejection position alignment and avoid ejection offset.

[0041] Step 3: Flexible and balanced ejection

[0042] Power output: Start the ejector cylinder 2, output thrust to drive the drive plate 3 to move, and guide rod 4 slides along the guide hole of mounting base 1 to ensure accurate ejection trajectory.

[0043] Uniform force application: The drive plate 3 drives the ejector rod 7 and the linkage plate 5 to move towards the product direction, the ejector pad 9 flexibly fits against the product surface, and several ejector rods 7 apply force evenly.

[0044] During the ejection process, the spring components of ejection rod 7 and positioning pin 10 are compressed synchronously to absorb impact loads and avoid rigid collisions; the adjusting screw tube 8 slides inside the buffer tube 6 to further buffer stress.

[0045] Step 4: Product detachment and condition monitoring

[0046] Continuous ejection: Ejection cylinder 2 continuously advances, and ejection pad 9 maintains reliable contact with the product through anti-slip texture to avoid slippage until the product is completely removed from the mold cavity.

[0047] Step 5: Component Reset and Preparation for the Next Round

[0048] Reset Operation: After the product is detached, the ejector cylinder 2 reverses its movement, driving each ejector component to reset, and the positioning pin 10 returns to its extended state under the action of the spring.

[0049] Inspection and maintenance: Clean impurities from the surface of ejector pad 9, check the wear of the ejector assembly, and prepare for the next product ejection.

[0050] Step 6: Product Replacement and Adaptation

[0051] Parameter adjustment: When changing to products of different specifications, repeat the parameter adjustment in step 1. Adjust the length of the ejector rod 7 by adjusting the screw tube 8 and replace the appropriate ejector pad 9. No need to replace the main structure, achieving quick adaptation.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mold ejection structure for preventing product tearing, characterized in that, It includes an ejection drive unit, a balanced ejection unit, a flexible contact unit, and a mounting base (1); the ejection drive unit, the balanced ejection unit, and the buffer adjustment unit are all mounted on the mounting base (1), the flexible contact unit is fixed to the end of the balanced ejection unit, the mounting base (1) is a rectangular plate, and several guide holes are opened on the mounting base (1). The ejection drive unit includes an ejection cylinder (2), a drive plate (3), and several guide rods (4); the balanced ejection unit includes several ejection rods (7), a linkage plate (5), an adjustment screw (8), and a buffer tube (6); the flexible contact unit includes a silicone ejection pad (9), anti-slip texture, and a positioning pin (10).

2. The mold ejection structure for preventing product tearing according to claim 1, characterized in that, The ejector cylinder (2) is fixed to the outside of the mounting base (1). The output end of the ejector cylinder (2) passes through the mounting base (1) and is connected to the drive plate (3). The guide rod (4) is fixed to the four corners of the drive plate (3) and passes through the guide hole of the mounting base (1).

3. The mold ejection structure for preventing product tearing according to claim 2, characterized in that, The ejector rod (7) has a two-section structure, and the lower half of the ejector rod (7) is rotatably sleeved on the upper half of the ejector rod (7). The upper half of the ejector rod (7) is fixedly connected to the linkage plate (5) by a screw structure. The lower half of the ejector rod (7) is sleeved with the adjusting screw tube (8) through a threaded structure. The buffer tube (6) is located at the bottom of the drive plate (3). The adjusting screw tube (8) passes through the drive plate (3) and is slidably installed in the buffer tube (6) through the elastic element (11).

4. The mold ejection structure for preventing product tearing according to claim 3, characterized in that, The ejector pad (9) is attached to one side of the linkage plate (5), and the anti-slip texture is provided on the surface of the ejector pad (9).

5. The mold ejection structure for preventing product tearing according to claim 4, characterized in that, The linkage plate (5) is provided with several buffer grooves, and the positioning pin (10) is slidably installed in the buffer groove through the buffer member (12).

6. The mold ejection structure for preventing product tearing according to claim 5, characterized in that, The buffer (12) and elastic element (11) adopt a spring structure.

7. The mold ejection structure for preventing product tearing according to claim 6, characterized in that, The top of the positioning pin (10) has a spherical structure.

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