Ejection mechanism and mold
By designing a three-stage lifting stroke and guiding structure for the ejection mechanism, the separation of the injection molding runner from the product was achieved, solving the problem of product damage caused by runner adhesion and improving production efficiency and product yield.
Patent Information
- Application Number
- CN202423206507.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-25
AI Technical Summary
During the demolding process of precision products, the injection runner can easily stick to the product body, causing product damage and increasing production costs and reducing efficiency.
Design an ejection mechanism including a stacked top plate and template assembly, which achieves separation of the runner from the product through three lifting strokes. The coordinated action of the runner ejector pin, the clamping mechanism and the ejector sleeve ensures that the product is separated from the runner before demolding, and uniform force is achieved through the guiding structure and delayed contact gap.
This effectively prevents product damage during demolding, improves production efficiency, reduces production costs, and ensures product quality and demolding reliability.
Smart Images
Figure CN223735375U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a mould technical field especially relates to a ejection mechanism and mould. BACKGROUND
[0002] At present, plastic parts are usually injected into the forming cavity of the injection mold when processing, and the demolding structure is controlled after cooling and forming to separate the product from the forming cavity.
[0003] After some products are formed, the flow channel of injection is bonded to the product body and is ejected from the mold together. For precision products, the flow channel may cause damage to the product itself during the demolding process, thereby affecting the product quality, and the flow channel bonded product needs to be screened before entering the flow channel separation process, which will undoubtedly lead to the problem of increasing cost and reducing efficiency in production.
[0004] Therefore, it is necessary to design an injection mold with an ejection mechanism to solve the above problems. INVENTION CONTENTS
[0005] The utility model discloses a kind of ejection mechanism and mould, which can effectively separate flow channel before ejecting product, realize reliable automated demolding function, so as to improve the production efficiency of product, reduce production cost.
[0006] The utility model discloses the following technical scheme is adopted to realize the purpose:
[0007] A kind of ejection mechanism, comprising:
[0008] Top plate assembly, including the first top plate and the second top plate of laminated arrangement, wherein the second top plate is used to connect jacking device;
[0009] Template assembly, including the first template and the second template of laminated arrangement, wherein the second template is provided with die core in the first template;
[0010] Clamping machine, lower end fixedly connected the first and second top plate, upper end separablely connected the first template;
[0011] Forming assembly, including core, cylinder and barrel needle sequentially arranged from outside to inside, wherein the core is connected with the first template, the lower end of the cylinder is connected with the first top plate after penetrating the second template;
[0012] Flow channel ejector pin, it is arranged in one side of the forming assembly, the lower end of the flow channel ejector pin is connected with the second top plate, and upper end sequentially penetrates the second template and the die core.
[0013] In some embodiments, the top plate assembly is configured to have three jacking strokes, wherein:
[0014] In the first ejection stroke, the runner pin moves upward, causing the injection runner to separate from the target product;
[0015] In the second ejection stroke, the first mold plate is moved upward by the buckle machine, and the plunger is moved upward synchronously, so that the target product is separated from the mold core;
[0016] In the third ejection stroke, the buckle machine is separated from the first mold plate, and the plunger continues to move upward until the target product is completely ejected.
[0017] In some embodiments, a matching sleeve for abutting the lower end of the plunger is arranged in the second top plate, and a first delayed contact gap L1 is arranged between the second top plate and the matching sleeve.
[0018] In some embodiments, the buckle machine comprises:
[0019] A machine base is arranged outside the mold plate assembly, and a pull rod slot is arranged inside the machine base, and a guide structure is arranged at the top of the machine base;
[0020] A pull rod member is arranged in the pull rod slot and slides in the Z-axis direction, and the bottom of the pull rod member is connected to the first and second top plates, and a jacking step is arranged at the top of the pull rod member;
[0021] A locking member is arranged at the side of the first mold plate and slides in the X-axis direction, and in the initial state, the locking member is partially arranged between the guide structure and the jacking step, and a second delayed contact gap L2 is arranged between the locking member and the jacking step;
[0022] A spring is arranged between the locking member and the first mold plate, and the spring is used to reset the locking member.
[0023] In some embodiments, a limiting sleeve fixed to the first mold plate is arranged on the outer periphery of the locking member, and a ball or bearing is arranged inside the limiting sleeve.
[0024] In some embodiments, a connecting bridge is arranged on the outer periphery of the core, and the connecting bridge is fixed to the first mold plate through the connecting bridge;
[0025] A third delayed contact gap L3 is arranged between the connecting bridge and the mold core.
[0026] In some embodiments, a cooling flow channel is arranged between the core and the connecting bridge, and an inlet and outlet flow channel connected to the cooling flow channel is arranged on the first mold plate.
[0027] In some embodiments, a limiting screw is arranged between the first and second mold plates, and the limiting screw is used to limit the distance of upward movement of the first mold plate to be equal to the distance of the third delayed contact gap L3.
[0028] In some embodiments, a guide reset feature is provided between the top plate assembly and the mold plate assembly.
[0029] A mold including the ejection mechanism described above.
[0030] Compared with the prior art, the beneficial effects of the utility model at least include:
[0031] 1、Before demolding, the injection flow channel is separated from the target product, avoiding damage to the target product during demolding and subsequent screening and reprocessing problems, effectively improving the production efficiency of the product, reducing the production cost, and ensuring the product quality and integrity.
[0032] 2、During demolding, two times of lifting are adopted, the target product is uniformly stressed, and can be completely separated from the mold core, improving the product yield and demolding reliability. BRIEF DESCRIPTION OF DRAWINGS
[0033] Figure 1 is a three-dimensional schematic view of the ejection mechanism of the utility model.
[0034] Figure 2 is a sectional structure schematic view of the ejection mechanism of the utility model.
[0035] Figure 3 is Figure 2 a local enlarged view.
[0036] Figure 4 is a connection structure schematic view of the utility model's buckling machine and the top plate assembly and the mold plate assembly.
[0037] In the figure: 1, top plate assembly; 11, first top plate; 12, second top plate; 2, mold plate assembly; 21, first mold plate; 22, second mold plate; 23, connecting bridge; 3, buckling machine; 31, machine base; 311, pull rod groove; 312, guide structure; 32, pull rod piece; 321, lifting step; 33, locking piece; 34, spring; 35, limiting sleeve; 4, forming assembly; 41, core; 411, cooling flow channel; 42, barrel; 43, barrel needle; 5, flow channel ejector pin; 6, mold core; 7, matching sleeve; 8, limiting screw; 9, guide reset feature; 10, lifting device. DETAILED DESCRIPTION
[0038] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations, however, can be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and fully convey the inventive aspects to those skilled in the art. Identical reference numerals can be used to refer to identical or similar elements throughout the several figures, and description of the same can be omitted.
[0039] The words expressing position and direction described in the utility model are all explained by taking the drawings as examples, but changes can also be made according to needs, and the changes made are all included in the protection scope of the utility model.
[0040] Referring to Figures 1 to 4 The utility model discloses a ejection mechanism, including roof panel subassembly 1, template subassembly 2, buckle machine 3, forming subassembly 4 and runner ejector pin 5.
[0041] Among them, the die insert 6 is arranged on the template subassembly 2, and the forming subassembly 4 is arranged in the die insert 6, which is used for injection molding of target products, and the roof panel subassembly 1 is selectively linked with the template subassembly 2 through the buckle machine 3, cooperates with the runner ejector pin 5 and part of the forming subassembly 4, sequentially cuts off injection runner and ejects target products, and completes demolding action.
[0042] As shown in Figure 2 And Figure 4 As shown in, the template subassembly 2 includes the first template 21 and the second template 22 arranged in layers. Among them, the first template 21 is located in the upper layer of the second template 22 and can move up and down relative to it, the die insert 6 is arranged in the first template 21, and the forming subassembly 4 and the runner ejector pin 5 are both arranged in the die insert 6.
[0043] The roof panel subassembly 1 is arranged below the template subassembly 2 and includes the first roof panel 11 and the second roof panel 12 arranged in layers. Among them, the first roof panel 11 is located in the upper layer of the second roof panel 12, and the first roof panel 11 is used for connecting the runner ejector pin 5 and the part of the barrel 42 of the forming subassembly 4. The second roof panel 12 is used for connecting the jacking device 10, for example, the jacking rod driven by hydraulic pressure, so as to provide the ejection power. And, the second roof panel 12 is provided with the matching sleeve 7, and the matching sleeve 7 is used for abutting the lower end of the barrel 42, and the target product is separated from the die insert 6 by pushing the barrel 42 to move upwards. In the application, the first delay contact gap L1 is arranged between the second roof panel 12 and the matching sleeve 7, and the gap is determined according to the injection condition, for example, it can be 3mm, and the design of the first delay contact gap L1 can make the runner ejector pin 5 move first than the barrel 42, and since the runner ejector pin 5 is arranged on one side of the forming subassembly 4, the lower end thereof is connected with the second roof panel 12, and the upper end sequentially penetrates the second template 22 and the die insert 6, and when the runner ejector pin 5 moves upwards, the injection runner and the target product can be separated.
[0044] The lower end of the buckle machine 3 is fixedly connected with the first roof panel 11 and the second roof panel 12, and the upper end is separably connected with the first template 21, so as to selectively drive the first template 21 to move upwards, cooperate with the forming subassembly 4 and the runner ejector pin 5 to perform corresponding actions. Figure 2 And Figure 3As shown, the buckle machine 3 includes a machine base 31, a pull rod member 32, a lock buckle member 33 and a spring 34. Among them, the machine base 31 is arranged outside the mold plate assembly 2 and is fixedly connected with the second mold plate 22. The inner side of the machine base 31 is provided with a pull rod groove 311 for limiting and guiding the pull rod member 32. The top is provided with a guide structure 312 (including an upper inclined guide surface and a lower inclined guide surface) for driving the lock buckle member 33 to retract and promote the first mold plate 21 to be in place and then be separated from the buckle machine 3. The pull rod member 32 is slidably arranged in the pull rod groove 311 along the Z-axis direction. The bottom is fixedly connected with the first and second top plates 11 and 12. The top is provided with a jacking step 321 which is used to form a lap joint with the outer extension part (head) of the lock buckle member 33, so as to lift the first mold plate 21 upward and separate the target product from the mold core 6. The lock buckle member 33 is slidably arranged at the side edge of the first mold plate 21, for example, in the groove at the side edge of the first mold plate 21. The lock buckle member 33 and the first mold plate 21 are provided with the spring 34. The spring 34 has a resetting function and can push the head of the lock buckle member 33 outward so as to be between the guide structure 312 and the jacking step 321. In the present application, a second delay contact gap L2 is arranged between the lock buckle member 33 and the jacking step 321 in the initial state. The distance is the same as the first delay contact gap L1, which is used to absorb the first jacking stroke of the first top plate 11. During this period, only the runner pin 5 can move upward.
[0045] Also see Figure 2 As shown, the forming assembly 4 is sequentially provided with a core 41, a barrel 42 and a barrel needle 43 from outside to inside, which together form an injection molding cavity on the mold core 6. Among them, the core 41 is connected with the first mold plate 21. As an example, the outer periphery of the core 41 is provided with a connecting bridge 23 which is integrated with the first mold plate 21. The connecting bridge 23 can drive the core 41 to move up and down with the first mold plate 21, so as to separate the target product from the mold core 6. In the present application, a third delay contact gap L3 is arranged between the connecting bridge 23 and the mold core 6. The gap is determined according to the demolding condition, for example, it can be 5mm. The third delay contact gap L3 provides a certain space for the synchronous upward movement of the core 41 and the barrel 42, so that the target product is uniformly stressed and completely and reliably separated from the mold core 6. After the third delay contact gap L3 disappears, the buckle machine 3 is separated from the first mold plate, thereby limiting the height position of the first mold plate and the core 41. For the barrel 42, the lower end penetrates through the second mold plate 22 and is connected with the first top plate 11. After the target product is separated from the mold core 6, the top plate assembly 1 continues to drive the barrel 42 to move upward, so as to completely eject the target product and complete the demolding action.
[0046] In the above ejection mechanism, the top plate assembly 1 is configured to have three jacking strokes:
[0047] In the first ejection stroke, the flow channel ejector pin 5 moves upward, causing the injection flow channel to separate from the target product. Specifically, the lifting device 10 can drive the second top plate 12 to move upward by 3 mm. Due to the existence of the first delayed contact gap L1 and the second delayed contact gap L2, the first mold plate 21 and the molding assembly 4 remain stationary during this process, and only the flow channel ejector pin 5 moves upward by 3 mm, thereby separating and disconnecting the injection flow channel from the target product, which is the first ejection.
[0048] In the second ejection stroke, the first mold plate 21 is driven upward by the buckle machine 3, and the plunger 42 is synchronously moved upward to separate the target product from the mold core 6. Specifically, the lifting device 10 can drive the second top plate 12 to move upward by 5 mm. During this process, the first mold plate 21 is driven upward by 5 mm and separated from the buckle machine 3, and at the same time, the plunger 42 is also moved upward by 5 mm. Together, they eject the target product by 5 mm, which separates the target product from the mold core 6 (the mold core 6 is always fixed on the second mold plate 22), which is the second ejection.
[0049] In the third ejection stroke, the buckle machine 3 is separated from the first mold plate 21, and the plunger 42 continues to move upward until the target product is completely ejected. For example, the lifting device 10 continues to drive the second top plate 12 to move upward. During this process, since the buckle machine 3 has been separated from the first mold plate 21, the first mold plate 21 and the core 41 remain stationary, and only the plunger 42 can continue to move upward, thereby completely ejecting the target product, and the demolding process is completed.
[0050] In summary, before demolding, the ejection mechanism first separates the injection flow channel from the target product, avoiding damage to the target product during demolding and subsequent screening and reprocessing problems, effectively improving the production efficiency of the product, reducing the production cost, and ensuring the product quality and integrity. During demolding, two upward movements are used, the target product is uniformly stressed, and the target product can be completely separated from the mold core 6, improving the product yield and demolding reliability.
[0051] Referring to Figure 3 As shown, in some embodiments, the outer periphery of the locking piece 33 is provided with a limiting sleeve 35 fixed with the first mold plate 21. The limiting sleeve 35 is fixed with the groove of the side edge of the first mold plate 21, which is used to prevent the locking piece 33 from being separated.
[0052] Further, the inner side of the limiting sleeve 35 is provided with a ball or bearing (not shown) to reduce the friction between the locking piece 33 and the limiting sleeve 35 and improve the smoothness of the movement of the locking piece 33.
[0053] Referring to Figure 2As shown, in some embodiments, a cooling flow channel 411 is arranged between the core 41 and the connecting bridge 23, and the first mold plate 21 is provided with an inlet flow channel and an outlet flow channel (not shown) connected to the cooling flow channel 411. During molding, the cooling medium can be input from the inlet flow channel to the cooling flow channel 411 and discharged from the outlet flow channel after absorbing heat, so as to circulate, so as to locally cool the core 41 and the bushing 42, so as to accelerate the local cooling molding of the target product, and avoid the sticking problem caused by overheating and softening of the target product, and facilitate the subsequent demolding operation.
[0054] Referring to Figure 4 As shown, in some embodiments, a limiting screw 8 is arranged between the first mold plate 21 and the second mold plate 22, and the limiting screw 8 is used to limit the distance of the upward movement of the first mold plate 21. In the present application, the distance of the upward movement of the first mold plate 21 limited by the limiting screw 8 is equal to the distance of the third delay contact gap L3, for example, which can be 5mm.
[0055] In some embodiments, a guide reset feature 9 is arranged between the top plate assembly 1 and the mold plate assembly 2 to guide the reset of the mold plate assembly 2. For example, the guide reset feature 9 includes a guide column arranged between the top plate assembly 1 and the mold plate assembly 2 and an elastic member sleeved on the guide column.
[0056] The utility model discloses still a kind of mould, including the above ejection mechanism, the mould can first separate injection runner from target product before demolding, avoid target product demolding damage and subsequent screening reprocessing problem, effectively improve the production efficiency of product, reduce production cost, and ensure that product quality is intact nature. When demolding, using first and second times jacking, target product stress is uniform, and can completely separate from bushing 6, improve product yield and demolding reliability.
[0057] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary, and cannot be understood as limiting the utility model. The ordinary skilled in the art can change, modify, replace and modify the above-mentioned embodiments without departing from the principles and purposes of the utility model within the scope of the utility model. All these changes should be within the protection scope of the utility model claim.
Claims
1. An ejection mechanism characterized in that, The utility model relates to a kind of injection molding machine, including: Top plate assembly (1), including the first top plate (11) and second top plate (12) of laminated arrangement, wherein the second top plate (12) is used to connect jacking device (10); Formwork assembly (2), including the first formwork (21) and second formwork (22) of laminated arrangement, wherein the second formwork (22) is provided with the die core (6) received in the first formwork (21); Ducking machine (3), lower end fixedly connected the first and second top plate (11,12), upper end separable connection first formwork (21); Forming assembly (4), including the core (41) sequentially arranged from outside to inside, the boss cylinder (42) and barrel needle (43), wherein the core (41) is connected with the first formwork (21), the lower end of the boss cylinder (42) is connected with the first top plate (11) after penetrating the second formwork (22); Runner ejector pin (5), it is arranged in one side of the forming assembly (4), the lower end of the runner ejector pin (5) is connected with the second top plate (12), and the upper end sequentially penetrates the second formwork (22) and the die core (6).
2. The ejection mechanism of claim 1, wherein The top plate assembly (1) is configured to have three times of jacking stroke, wherein: In the first time, the runner ejector pin (5) moves up, causing injection runner to separate from target product; In the second time, the ducking machine (3) drives the first formwork (21) to move up, and the boss cylinder (42) is synchronously moved up to make target product separate from the die core (6); In the third time, the ducking machine (3) is separated from the first formwork (21), and the boss cylinder (42) continuously moves up until target product is completely ejected.
3. The ejection mechanism of claim 2, wherein, The second top plate (12) is provided with a matching sleeve (7) for abutting against the lower end of the boss cylinder (42), and a first delay contact gap L1 is provided between the second top plate (12) and the matching sleeve (7).
4. The ejection mechanism of claim 2, wherein The ducking machine (3) includes: Machine base (31), arranged outside formwork assembly (2), the inner side of the machine base (31) is provided with pull rod groove (311), and the top is provided with guide structure (312); Pull rod piece (32), slidingly arranged in the pull rod groove (311) along Z-axis direction, the bottom of the pull rod piece (32) is connected with the first and second top plate (11,12), and the top is provided with jacking step (321); Locking piece (33), slidingly arranged in the side of the first formwork (21) along X-axis direction, in initial state, the locking piece (33) is partially between the guide structure (312) and the jacking step (321), and a second delay contact gap L2 is provided between the locking piece (33) and the jacking step (321); Spring (34), arranged between the locking piece (33) and the first formwork (21), the spring (34) is used to reset the locking piece (33).
5. The ejection mechanism of claim 4, wherein, The outer periphery of the locking piece (33) is provided with a limiting sleeve (35) fixed with the first formwork (21), and the inner side of the limiting sleeve (35) is provided with ball or bearing.
6. The ejection mechanism of claim 1, wherein The outer periphery of the core (41) is provided with a connecting bridge (23), and is fixed with the first mold plate (21) through the connecting bridge (23); A third delayed contact gap L3 is arranged between the connecting bridge (23) and the mold core (6).
7. The ejection mechanism of claim 6, wherein, A cooling flow channel (411) is arranged between the core (41) and the connecting bridge (23), and the first mold plate (21) is provided with an inlet and outlet flow channel connected with the cooling flow channel (411).
8. The ejection mechanism of claim 6, wherein, A limiting screw (8) is arranged between the first and second mold plates (21, 22), and the limiting screw (8) is used to limit the distance of the upward movement of the first mold plate (21) to be equal to the distance of the third delayed contact gap L3.
9. The ejection mechanism of claim 1, wherein, A guide reset feature (9) is arranged between the top plate assembly (1) and the mold plate assembly (2).
10. A mold characterized in that, The ejection mechanism comprises the top plate assembly (1) and the mold plate assembly (2).