Secondary ejection structure of plastic mold
By using a secondary ejection structure in the plastic mold, and employing a fixed seat, limit block, and locking mechanism, the deformation problem caused by excessive ejection force in the primary ejection of the car horn cover mold is solved, achieving stable ejection of the product and improving its appearance quality.
Patent Information
- Application Number
- CN202520569065.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-28
AI Technical Summary
In the existing technology, the car horn cover mold is deformed due to excessive force during the first ejection, which affects the appearance quality.
The system employs a two-stage ejection structure using plastic molds. Through primary and secondary ejection actions, and utilizing a fixed base, limit block, and locking mechanism, the ejection force is reduced, ensuring smooth product ejection.
By using two ejection actions, product deformation or damage is avoided, ensuring product stability and accuracy, and improving product appearance quality.
Smart Images
Figure CN223904466U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a plastic mould secondary ejection structure belongs to mould technical field. BACKGROUND
[0002] The horn is the sound signal device of the automobile, and the horn cover is the necessary protection device of the horn. The horn cover mold is a tool for manufacturing the horn cover of the automobile, which is usually made of metal or plastic material. It is a tool for processing and manufacturing the horn cover of the automobile, which provides efficient, accurate and economic production process for the automobile manufacturing industry through the functions of shaping raw materials, controlling size and realizing batch production.
[0003] The prior art patent authorization number CN214773659 U discloses a kind of special straight top glue mould structure of automobile horn cover, including the flow channel that is entered into straight top bottom from parting surface outside, and the flow channel is entered into product back muscle position injection molding, when ejection product, straight top, inclined top are ejected synchronously, the flow channel is inverted triangle, and a part is overlapped on inclined top, the inclined top is matched with inclined top seat and ejects product, inclined top seat two sides are matched with inclined top guide block, and play the role of guiding, the straight top is matched with straight top rod and ejects product. Well solve the glue injection and pick-up problem of such double-injection horn cover injection mold, can reduce space, reduce cost, improve product quality, mold structure is stable and reliable, improve mold production efficiency. However, for the horn cover with many reinforcing ribs, the reinforcing rib width limits the ejection, which is easy to pierce the product or not to eject. UTILITY MODEL CONTENT
[0004] To solve the problems existing in the prior art, the utility model provides a plastic mold secondary ejection structure, aiming at solving the problem of product deformation caused by excessive primary ejection force, affecting the appearance quality of the product.
[0005] The utility model adopts the technical scheme of a kind of plastic mould secondary ejection structure, including ejector pin, connecting rod, reset rod, locking mechanism and from top to bottom setting movable die core, movable template, upper ejector pin plate, lower ejector pin plate, fixed plate with let hole;Lower ejector pin plate lower side is equipped with ejection block, movable die core is installed on movable template, ejector pin bottom end and reset rod bottom end are located between upper ejector pin plate and lower ejector pin plate, ejector pin top end successively penetrates upper ejector pin plate, movable template and movable die core, reset rod top end successively penetrates upper ejector pin plate and movable template, reset spring is equipped between upper ejector pin plate and movable template, movable die core is equipped with top block, top block is connected with the top end of connecting rod by connecting pin, and the bottom end of connecting rod is equipped with fixing seat;When opening mould, lower ejector pin plate drives connecting rod to eject once, at this time, fixing seat is in contact with movable template, locking mechanism releases the locking of fixing seat, and then lower ejector pin plate continues to drive ejector pin to complete secondary ejection.
[0006] Further, the reset spring is sleeved on the reset rod.
[0007] Further, the locking mechanism comprises a guide block, a locking block and a locking spring, the locking block is sleeved on the guide block, and the locking spring is connected to the side wall of the locking block and the upper ejector plate at two ends.
[0008] Further, the side wall of the fixed seat is provided with a clamping groove, and the locking block is detachably inserted into the clamping groove.
[0009] Further, the hollow area in the locking block is larger than the cross-sectional dimension of the guide block.
[0010] Further, the bottom end of the guide block is fixed on the fixed plate through a screw, the other end of the guide block penetrates through the lower ejector plate and the upper ejector plate, the bottom end of the guide block is close to the side where the fixed seat is located, and the top end of the guide block is away from the side where the fixed seat is located.
[0011] Further, the upper ejector plate is provided with a sliding groove, and the locking block is provided with a pressing block on two sides, and the pressing block is slidably connected with the sliding groove.
[0012] Further, the lower surface of the movable die plate is provided with a step, and the step is provided with a limiting block for limiting the movement stroke of the fixed seat.
[0013] The utility model discloses a plastic mould secondary ejection structure, which has the beneficial effects that compared with the prior art, the utility model discloses through the use of twice ejection action reduces the ejection force, guarantees the stability of product ejection process, avoids the product deformation or damage caused by ejection. Through the design of the fixed seat, the limiting block and the locking mechanism, the locking block and the fixed seat are switched between locking and unlocking, and the stability and accuracy of twice ejection are guaranteed. ACCURACY
[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.
[0015] Fig. 1 It is a partial schematic view of the three-dimensional structure of the utility model;
[0016] Fig. 2 It is a second ejection cross-sectional structure schematic view when the utility model is opened;
[0017] Fig. 3 It is a cross-sectional structure schematic view when the utility model is closed;
[0018] Fig. 4 It is the utility model Fig. 3The middle locking block and the fixed seat locking state structure schematic view;
[0019] Fig. 5 The top pin plate top view structure schematic view of the utility model;
[0020] Fig. 6 The product (car horn cover).
[0021] As shown in the figure: 1, product; 2, top block; 3, connecting pin; 4, connecting rod; 5, fixed seat; 6, ejector pin; 7, ejector block; 8, guide block; 9, locking block; 10, locking spring; 11, reset spring; 12, reset rod; 13, top pin plate; 14, bottom pin plate; 15, fixed plate; 16, moving die plate; 17, limit block; 18, moving die core; 19, let go of the hole; 20, clamping groove; 21, pressing block; 22, sliding slot; 81, first horizontal section; 82, transition section; 83, second horizontal section. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.
[0023] In order to further understand the content of the utility model, the technical scheme will be further described below in combination with specific embodiments.
[0024] Embodiment 1: as Figs. 1-6As shown, the embodiment provides a plastic mold secondary ejection structure, which comprises a top block 2, a connecting rod 4, a fixing seat 5, a ejector pin 6, an ejector block 7, a guide block 8, a lock block 9, a locking spring 10, a reset spring 11, a reset rod 12, an upper ejector pin plate 13, a lower ejector pin plate 14, a fixing plate 15, a movable mold core 18, and a movable mold plate 16. The movable mold core 18 is installed on the movable mold plate 16, and the movable mold plate 16, the upper ejector pin plate 13, the lower ejector pin plate 14, and the fixing plate 15 are sequentially arranged from top to bottom. The ejector block 7 is installed below the lower ejector pin plate 14 through a screw, and the fixing plate 15 is provided with a clearance hole 19. The upper ejector pin plate 13 and the lower ejector pin plate 14 are fixed together through a screw. The bottom end of the ejector pin 6 and the bottom end of the reset rod 12 are located between the upper ejector pin plate 13 and the lower ejector pin plate 14. The top end of the ejector pin 6 penetrates the upper ejector pin plate 13, the movable mold plate 16, and the movable mold core 18 in sequence. The top end of the reset rod 12 penetrates the upper ejector pin plate 13 and the movable mold plate 16 in sequence. The reset spring 11 is arranged between the upper ejector pin plate 13 and the movable mold plate 16 and is sleeved on the reset rod 12. The ejector pin 6 ejects the product 1 during the ejection process. The movable mold core 18 is provided with the top block 2. The top block 2 is connected with the top end of the connecting rod 4 through a connecting pin 3. The bottom end of the connecting rod 4 is provided with the fixing seat 5. The middle parts of the movable mold core 18, the movable mold plate 16, the upper ejector pin plate 13, and the lower ejector pin plate 14 are provided with avoiding spaces, so that the top block 2, the connecting rod 4, and the fixing seat 5 can move along the avoiding spaces during the ejection or reset process. When the mold is opened, the lower ejector pin plate 14 drives the connecting rod 4 to perform primary ejection. At this time, the fixing seat 5 is in contact with the movable mold plate 16. The locking mechanism releases the locking of the fixing seat 5. Then, the lower ejector pin plate 14 continues to drive the ejector pin 6 to complete secondary ejection. In the embodiment, the ejector pin 6 is in multiple groups. Different diameters and different positions of the ejector pin 6 are designed for different parts of the reinforcing ribs, so that the ejection force is more suitable for the needs of different regions.
[0025] Embodiment 2: as Figs. 1-6As shown, on the basis of Embodiment 1, as a specific embodiment of the present embodiment, the locking mechanism includes a guide block 8, a locking block 9 and a locking spring 10, the locking block 9 is sleeved on the guide block 8, the locking block 9 is hollow inside and the size is larger than the cross-sectional size of the guide block 8, so as to ensure that the locking block 9 has enough stroke space when locking or unlocking with the fixed seat 5. The locking spring 10 is connected to the side wall of the locking block 9 and the upper ejector plate 13 at both ends respectively. The side wall of the fixed seat 5 is provided with a clamping groove 20, and the locking block 9 is inserted and matched with the clamping groove 20; the bottom end of the guide block 8 is fixed on the fixed plate 15 through a screw, and the other end of the guide block 8 penetrates the lower ejector plate 14 and the upper ejector plate 13, the bottom end of the guide block 8 is close to the side where the fixed seat 5 is located, and the top end of the guide block 8 is away from the side where the fixed seat 5 is located, specifically, the guide block 8 is divided into a first horizontal section 81, a transition section 82 and a second horizontal section 83 from the bottom end to the top end, the first horizontal section 81 and the second horizontal section 83 are arranged in parallel, and the transition section 82 gradually inclines from the middle to the outside from the bottom end to the top end, and the inclination angle of the transition section 82 needs to meet that when the mold is closed, the locking block 9 just moves to the junction of the transition section 82 and the first horizontal section 81 and the locking block 9 can just be inserted into the clamping groove 20 of the fixed seat 5. Specifically, the locking spring 10 is installed between the second horizontal section 83 of the guide block 8 away from the fixed seat 5 and the upper ejector plate 13. In order to ensure the stability and accuracy of the movement of the locking block 9, the upper ejector plate 13 is provided with a sliding groove 22, and the locking block 9 is provided with a pressing block 21 on both sides, the pressing block 21 is slidingly connected with the sliding groove 22, when the locking spring 10 drives the locking block 9 to move, the pressing block 21 moves along the sliding groove 22, so that the locking block 9 approaches or moves away from the fixed seat 5.
[0026] On this basis, in order to ensure that the locking block 9 and the clamping groove 20 are precisely inserted and matched during the ejection process, a limiting block 17 for limiting the movement stroke of the fixed seat 5 is arranged in the step on the lower surface of the movable die plate 16, so that when the fixed seat 5 contacts with the limiting block 17, the locking block 9 is driven by the locking spring 10 and the locking block 9 is out of the clamping groove 20.
[0027] As Figs. 1-6As shown, taking Example 2 as an example, the working process of the utility model is specifically described: first, when the mold is opened, the ejection block 7 is ejected from the accommodation hole 19 of the fixed plate 15 by the molding machine, and then the upper ejector plate 13 and the lower ejector plate 14 are moved, and the bottom end of the guide block 8 does not move because it is connected with the fixed plate 15 during the moving process, and the locking block 9 moves along the guide block 8 to the top end direction of the guide block 8, when the fixed seat 5 contacts with the limiting block 17, the locking spring 10 is compressed, the locking spring 10 pulls the locking block 9 out of the clamping groove 20 of the fixed seat 5, at this time, the top block 2 above the connecting rod 4 performs the first ejection on the product 1, and then the ejection block 7 continues to move upward to drive the upper ejector plate 13 and the lower ejector plate 14 to move, and then the ejector pin 6 performs the second ejection on the product 1, and the reset spring 11 is continuously compressed, at this time, the product 1 is completely separated from the movable mold core 18; when the mold is closed, the molding machine withdraws the support and retreats, the reset spring 11 is driven to reset the lower ejector plate 14, the upper ejector plate 13, the locking mechanism and other components, during the process, the locking block 9 is gradually close to the fixed seat 5 under the driving of the compressed locking spring 10, when the lower ejector plate 14 contacts with the fixed plate 15, the locking block 9 just moves to the junction of the transition section 82 and the first horizontal section 81 and the locking block 9 can be inserted into the clamping groove 20 of the fixed seat 5. During the opening and closing of the mold, the reset rod 12 plays a guiding role; the guide block 8 also plays a guiding role, which ensures that the locking block 9 and the fixed seat 5 can move accurately. The locking or unlocking state is realized by the cooperation of the locking mechanism and the fixed seat 5. The locking spring 10 provides elastic force for assisting the locking or unlocking between the locking block 9 and the fixed seat 5. Through the two-time ejection mode during the ejection process, the problem that the product 1 is deformed due to the excessive ejection force or the insufficient uniformity of the ejection force of the one-time stamping ejection operation is avoided, the stable ejection of the product 1 is ensured, and the good appearance of the product 1 is ensured.
[0028] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.
Claims
1. A secondary ejection structure of a plastic mold characterized by comprising: The ejection mechanism comprises a ejector pin (6), a connecting rod (4), a reset rod (12), a locking mechanism, and a movable mold core (18), a movable mold plate (16), an upper ejector plate (13), a lower ejector plate (14), a fixed plate (15) with a clearance hole (19) arranged from top to bottom; a ejection block (7) is arranged below the lower ejector plate (14), the movable mold core (18) is arranged on the movable mold plate (16), the bottom end of the ejector pin (6) and the bottom end of the reset rod (12) are located between the upper ejector plate (13) and the lower ejector plate (14), the top end of the ejector pin (6) penetrates the upper ejector plate (13), the movable mold plate (16) and the movable mold core (18) in sequence, the top end of the reset rod (12) penetrates the upper ejector plate (13) and the movable mold plate (16) in sequence, a reset spring (11) is arranged between the upper ejector plate (13) and the movable mold plate (16), a ejection block (2) is arranged in the movable mold core (18), the ejection block (2) is connected with the top end of the connecting rod (4) through a connecting pin (3), and a fixed seat (5) is arranged at the bottom end of the connecting rod (4); when the mold is opened, the lower ejector plate (14) drives the connecting rod (4) to be ejected once, at this time, the fixed seat (5) is in contact with the movable mold plate (16), the locking mechanism releases the locking of the fixed seat (5), and then the lower ejector plate (14) continues to drive the ejector pin (6) to complete secondary ejection.
2. The secondary ejection structure of a plastic mold according to claim 1, wherein The locking mechanism comprises a guide block (8), a locking block (9) and a locking spring (10), the locking block (9) is sleeved on the guide block (8), and the two ends of the locking spring (10) are connected with the side wall of the locking block (9) and the upper ejector plate (13) respectively.
3. A plastic mold secondary ejection structure according to claim 2, wherein The bottom end of the guide block (8) is fixed on the fixed plate (15) through a screw, the other end of the guide block (8) penetrates the lower ejector plate (14) and the upper ejector plate (13), the bottom end of the guide block (8) is close to the side where the fixed seat (5) is located, and the top end of the guide block (8) is away from the side where the fixed seat (5) is located.
4. The plastic mold secondary ejection structure of claim 3, wherein, The side wall of the fixed seat (5) is provided with a clamping groove (20), and the locking block (9) and the clamping groove (20) are detachably inserted and matched.
5. A secondary ejection structure for a plastic mould according to any one of claims 2 to 4, characterised in that, The hollow area in the locking block (9) is larger than the cross-sectional dimension of the guide block (8).
6. A plastic mold secondary ejection structure according to claim 5, wherein The upper ejector plate (13) is provided with a sliding groove (22), the locking block (9) is provided with a pressing block (21) on the two sides, and the pressing block (21) is in sliding connection with the sliding groove (22).
7. The plastic mold secondary ejection structure of claim 2, wherein, The lower surface of the movable mold plate (16) is provided with a step, and a limiting block (17) for limiting the movement stroke of the fixed seat (5) is arranged in the step.
8. The plastic mold secondary ejection structure of claim 1, wherein, The reset spring (11) is sleeved on the reset rod (12).