A demolding structure with size slider delayed movement under single drive

Abstract

The application discloses a single driving demoulding structure with size slider delayed movement. The structure comprises a base, a large slider, a small slider, a mould core, a driving rod and a shovel base. The mould core is provided with an inserting cavity for accommodating the driving rod. The end of the driving rod is provided with a gradually outwardly inclined guide groove. The small slider is inserted into the mould core along the vertical direction and can move up and down along the vertical direction. The bottom end of the small slider is provided with a guide block which is always placed in the guide groove. The surface of the sliding seat is provided with at least two locking grooves. The large slider is provided with a spring plunger. The side of the shovel base close to the large slider is sequentially provided with an inclined surface and a first vertical surface from top to bottom. The application can separate and drive the movement of the large and small sliders by vertical driving, so that the two sliders realize delayed movement. The application meets the design of the demoulding during injection molding, effectively reduces the design of the driving structure, makes the overall structure simpler, and facilitates the design to be more compact.

Description

Technical Field

[0001] This invention relates to the field of demolding structure technology, and in particular to a demolding structure in which large and small sliders move with a delay under a single drive. Background Technology

[0002] As is well known, injection molding is a method of industrial product manufacturing. This method usually uses rubber injection molding and plastic injection molding. It uses an upper mold and a lower mold to form a closed injection cavity. After the injection molding is completed, the upper mold and the lower mold are separated, and finally the product is removed.

[0003] Currently, existing demolding methods either rely on prying the product off with tools, which is only suitable for relatively large injection molded products. For some small injection molded products (such as Bluetooth headphones), prying them off with tools can easily damage the product. The other method involves using ejector pins. During injection, the top surface of the ejector pin passes through the injection cavity and forms a snap-fit ​​structure. The snap-fit ​​is mainly used to hold the injection molded product in place, stabilizing it. Although this allows the product to remain in the open mold, avoiding the need for the product to follow the upper or lower mold, the snap-fit ​​must be released first during demolding, and then the mold core must be detached from the product. Therefore, conventional demolding structures require two sets of drives: one to drive the snap-fit ​​and the other to drive the mold core movement. The order of these two drives cannot be reversed. Designing two sets of drives for injection molds of small products undoubtedly increases the size of the mold body and the number of internal structural components. If a small and simple mold is to be made, both the production of the mold assembly and the layout of the internal structure will be very difficult.

[0004] Therefore, structural optimization is required for the existing demolding structure. Summary of the Invention

[0005] To address the shortcomings of the existing technology, the present invention aims to provide a demolding structure with delayed movement of large and small sliders under a single drive.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A demolding structure with delayed movement of large and small sliders under a single drive includes a base, a large slider, a small slider, a mold core, a drive rod, and a spade base. The base is mounted on the mold and forms a first sliding cavity. The large slider is placed in the first sliding cavity and can move along the first sliding cavity. The mold core is connected to one end of the large slider and has an insertion cavity for accommodating the drive rod. The end of the drive rod has a guide groove that gradually slopes outward. A small slider is inserted vertically into the mold core and can move up and down vertically. A guide block is provided at the bottom of the small slider and is always placed in the guide groove. A second sliding cavity is provided inside the large slider. A sliding seat that can move along the second sliding cavity is placed in the second sliding cavity. The surface of the sliding seat has at least two locking grooves. A spring plunger is installed on the large slider. The spring plunger's top ball is placed in the second sliding chamber and moves into different locking grooves as the sliding seat moves. The drive rod is fixedly connected to the sliding seat. The shovel base is located on the side of the large slider. A first spring is provided on one side of the large slider. One end of the first spring touches the mold. Under the action of the first spring, the other side of the large slider keeps touching the shovel base. The shovel base has an inclined surface and a first vertical surface arranged from top to bottom on the side near the large slider. The sliding seat and the side of the large slider facing the shovel base are both provided with a ramp that matches it. The bottom of the large slider is also provided with a second vertical surface that matches the first vertical surface of the shovel base. A slanted rod is inserted obliquely into the sliding seat. When the slanted rod moves upward, the sliding seat moves away from the mold core. The large slider is provided with a clearance hole relative to the slanted rod to prevent the slanted rod from touching the large slider.

[0008] Preferably, the guide groove is a dovetail groove, and the shape of the guide block corresponds to the shape of the guide groove, so that the guide block can only move along the direction specified by the guide groove.

[0009] Preferably, the mold core and the large slider are fixedly connected by a pressure plate, one end of the pressure plate is fixed to one end of the mold core by a fastener, and the other end of the pressure plate is fixed to the large slider by a fastener. A second spring is provided between the mold core and the large slider, and the second spring is always kept in a compressed state.

[0010] Preferably, the pressure plate presses down on the small slider, preventing the small slider from detaching from the mold core. The snap-fit ​​end of the small slider is placed on the injection surface of the mold core. The pressure plate is provided with a vertically downward guide post, and the small slider is provided with a guide hole corresponding to the guide post. The guide post is placed in the guide hole, so that the small slider can only move in the vertical direction.

[0011] Preferably, the bottom end of the shovel base is provided with a guide slope, and the two ends of the inclined surface of the shovel base, the top of the large slider and the sliding seat, and the junction with the slope are all provided with arc-shaped chamfers.

[0012] By adopting the above solution, this invention can drive the movement of the large and small sliders separately by relying on a vertical drive, so that the two can move with a delay. This satisfies the release design during injection molding, effectively reduces the design of the drive structure, makes the overall structure simpler, and makes it easier to design a smaller size. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of an embodiment of the present invention.

[0014] Figure 2 This is an exploded view of the structure of an embodiment of the present invention.

[0015] Figure 3 This is a schematic diagram of the exploded view of an embodiment of the present invention from another direction.

[0016] Figure 4 This is a schematic diagram of the structure of the sliding seat according to an embodiment of the present invention.

[0017] Figure 5 This is a schematic diagram of the shovel base according to an embodiment of the present invention.

[0018] Figure 6 This is a cross-sectional view of the drive rod in an embodiment of the present invention.

[0019] Figure 7 This is a cross-sectional view of the diagonal bar in an embodiment of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0023] like Figures 1 to 7As shown, this embodiment provides a demolding structure with delayed movement of large and small sliders under a single drive, including a base 1, a large slider 2, a small slider 3, a mold core 4, a drive rod 5, and a shovel base 6. The base 1 is mounted on the mold and forms a first sliding cavity. The large slider 2 is placed in the first sliding cavity and can move along the first sliding cavity. The mold core 4 is connected to one end of the large slider 2. The mold core 2 is provided with an insertion cavity that can accommodate the insertion of the drive rod 5. The end of the drive rod 5 is provided with a guide groove 7 that gradually tilts outward. The small slider 3 is inserted vertically into the mold core 4 and can move up and down vertically. The bottom end of the small slider 3 is provided with a guide block 8 (the tilt direction is adapted to the guide groove 7). The guide block 8 is always placed in the guide groove 7. A second sliding cavity is provided inside the large slider 2. A sliding seat 9 that can move along the second sliding cavity is placed in the second sliding cavity. The surface of the sliding seat 9 is provided with at least two locking grooves 10. A spring plunger is installed on the large slider 2. 11. The top ball of the spring plunger 11 is placed in the second sliding chamber and is pushed into different locking grooves 10 as the sliding seat 9 moves. The drive rod 5 is fixedly connected to the sliding seat 9. The shovel base 6 is located on the side of the large slider 2. A first spring 12 is provided on one side of the large slider 2. One end of the first spring 12 touches the mold. Under the action of the first spring 12, the other side of the large slider 2 always touches the shovel base 6. The shovel base 6 is provided with the following from top to bottom on the side near the large slider 2: Inclined surface 13 and first vertical surface 14, the sliding seat 9 and the large slider 2 are both provided with a ramp 15 adapted to the side facing the shovel base 6. The bottom of the large slider 2 is also provided with a second vertical surface 16 adapted to the first vertical surface 14 of the shovel base 6. An inclined rod 17 is inserted obliquely into the sliding seat 9. When the inclined rod 17 moves upward, the sliding seat 9 moves away from the mold core 4. The large slider 2 is provided with a clearance hole relative to the inclined rod 17 to prevent the inclined rod 17 from touching the large slider 2.

[0024] The main effect of this embodiment is that by relying on a vertical drive, the movement of the large and small sliders can be driven separately, allowing the two to move with a delay. This satisfies the release design during injection molding, effectively reduces the design of the drive structure, makes the overall structure simpler, and facilitates a more compact design.

[0025] During injection molding, in this embodiment, the drive rod 5 is moved to the innermost end (i.e., the direction closer to the mold core is the inner end, and the direction farther from the mold core is the outer end), that is, the end closest to the mold core 4. At this time, because the drive rod 5 is moved to the innermost end, the guide block 8 is at the highest position of the guide groove 7, so the small slider 3 is at the highest position, that is, the buckle 100 of the small slider 3 is pushed out and placed on the injection surface of the mold core 4. The inclined rod 17 and the shovel base 6 are both moved to the lowest position, the first spring 12 is compressed to the maximum range, the large slider 2 and the sliding seat 9 are both moved to the innermost end, the first vertical surface 14 of the shovel base 6 and the second vertical surface 16 of the large slider 2 are in contact, and the slope 17 of the sliding seat 9 and the inclined surface 13 of the shovel base 6 are in contact. In this structural state, injection molding can be performed.

[0026] When the mold opens, the inclined rod 17 and the shovel base 6 move upwards synchronously. Driven by the inclined rod 17, the sliding seat 9 moves away from the mold core 4, that is, the sliding seat 9 moves from one side of the second sliding cavity to the other side. Initially, the first vertical surface 14 of the shovel base 6 has a height value. Therefore, although the sliding seat 9 and the large slider 2 are connected by the spring plunger 11 (the large slider 2 can move with the sliding seat 9 when not blocked by external force), the shovel base 6 initially limits the movement of the large slider 2 by the first vertical surface 14. Thus, after the sliding seat 9 moves, the locking groove 10 disengages from the spring plunger 11, allowing the sliding seat 9 to move on its own, while the large slider 2 remains stationary. After the sliding seat 9 moves, it drives the drive rod 5 to move synchronously. After the movement, the guide groove 7 receives the guide block 8 at its highest position, gradually receiving it at a lower position, thus causing the guide block 8 to gradually descend, resulting in the first disengagement. As the inclined rod 17 and the shovel base 6 continue to move upward, the first vertical surface 14 of the shovel base 6 just disengages from the limit on the large slider 2, and the other locking groove 10 just docks with the spring plunger 11. At this time, the sliding seat 9 can drive the large slider 2 to move together. Thus, after the inclined rod 17 and the shovel base 6 continue to move upward synchronously, the large slider 2 will also follow and move under the rebound force of the first spring 12. Thus, under the guidance of the inclined surface 13 of the shovel base 6 and the ramp 15 on the large slider 2 and the sliding seat 9, the mold core 2 can be pushed outward, and finally the secondary motion demolding is achieved. This asynchronous movement of the front and back forms the delayed movement between the large and small sliders.

[0027] Furthermore, in this embodiment, the guide groove 7 is a dovetail groove, and the shape of the guide block 8 corresponds to the shape of the guide groove 7. With this design, the guide block 8 can only move along the direction specified by the guide groove 7. Therefore, whether the drive rod 5 moves inward or outward, it will push the small slider 3 to move along the vertical direction.

[0028] Furthermore, in this embodiment, the mold core 4 and the large slider 2 are fixedly connected by a pressure plate 18. One end of the pressure plate 18 is fixed to one end of the mold core 4 by a fastener, and the other end of the pressure plate 18 is fixed to the large slider 2 by a fastener. A second spring 19 is provided between the mold core 4 and the large slider 2. The second spring 19 is always kept in a compressed state. This design achieves a fixed connection between the large slider 2 and the mold core 4, allowing the mold core 4 to move together with the large slider 2. On the other hand, the reaction force of the second spring 19 acts on the connection between the large slider 2 and the mold core 4 at all times, so that the connection between the two components is tightened, avoiding any looseness between the mold core 4 and the large slider 2 due to assembly tolerances.

[0029] Furthermore, during actual movement, the small slider 3 can only move in the vertical direction. In order to better limit the movement direction of the small slider 3, the pressure plate 18 in this embodiment presses against the top of the small slider 3, so that the small slider 3 cannot detach from the mold core 4. The buckle 100 end of the small slider 3 is placed at the injection surface of the mold core. The pressure plate 18 is provided with a vertically downward guide post (not shown in the figure). The small slider 3 is provided with a guide hole 20 corresponding to the guide post. The guide post is placed in the guide hole 20, so that the small slider 3 can only move in the vertical direction.

[0030] Furthermore, in order to better push the large slider 2 and the sliding seat 9 when the inclined rod 17 and the shovel base 6 move downwards, and to allow the large slider 2 and the sliding seat 9 to automatically retract, the bottom end of the shovel base 6 in this embodiment is provided with a guide slope 21. The two ends of the inclined surface 13 of the shovel base 6, and the points where the tops of the large slider 2 and the sliding seat 9 meet the slope 17 are all provided with arc-shaped chamfers. The end of the inclined rod 17 is a spherical surface. Relying on the guide slope 21, the arc-shaped chamfers, and the spherical surface, the large slider 2 and the sliding seat 9 can be smoothly forced to move when the inclined rod 17 and the shovel base 6 touch them.

[0031] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A demolding structure with delayed movement of large and small sliders under a single drive, characterized in that: The system includes a base, a large slider, a small slider, a mold core, a drive rod, and a shovel base. The base is mounted on the mold and forms a first sliding chamber. The large slider is placed in the first sliding chamber and can move along it. The mold core is connected to one end of the large slider and has an insertion cavity for accommodating the drive rod. The end of the drive rod has a guide groove that gradually slopes outward. A small slider is inserted vertically into the mold core and can move up and down vertically. A guide block is provided at the bottom of the small slider and is always placed in the guide groove. A second sliding chamber is provided inside the large slider. A sliding seat that can move along the second sliding chamber is placed in the second sliding chamber. The surface of the sliding seat has at least two locking grooves. A spring plunger is installed on the large slider, and the top ball of the spring plunger is positioned... The sliding block is located in the second sliding chamber and moves into different locking slots as the sliding seat moves. The drive rod is fixedly connected to the sliding seat. The shovel base is located on the side of the large slider. A first spring is provided on one side of the large slider. One end of the first spring touches the mold. Under the action of the first spring, the other side of the large slider touches the shovel base. The shovel base is provided with an inclined surface and a first vertical surface from top to bottom on the side near the large slider. The sliding seat and the side of the large slider facing the shovel base are both provided with a slope that matches it. The bottom of the large slider is also provided with a second vertical surface that matches the first vertical surface of the shovel base. A slanted rod is inserted obliquely into the sliding seat. When the slanted rod moves upward, the sliding seat moves away from the mold core. The large slider is provided with a clearance hole relative to the slanted rod to prevent the slanted rod from touching the large slider.

2. The demolding structure with delayed movement of large and small sliders under a single drive as described in claim 1, characterized in that: The guide groove is a dovetail groove, and the shape of the guide block corresponds to the shape of the guide groove, so that the guide block can only move along the direction specified by the guide groove.

3. The demolding structure with delayed movement of large and small sliders under a single drive as described in claim 2, characterized in that: The mold core and the large slider are fixedly connected by a pressure plate. One end of the pressure plate is fixed to one end of the mold core by a fastener, and the other end of the pressure plate is fixed to the large slider by a fastener. A second spring is provided between the mold core and the large slider, and the second spring is always kept in a compressed state.

4. The demolding structure with delayed movement of large and small sliders under a single drive as described in claim 3, characterized in that: The pressure plate presses down on the small slider, preventing the small slider from detaching from the mold core. The snap-fit ​​end of the small slider is positioned at the injection surface of the mold core. The pressure plate is provided with a vertically downward guide post, and the small slider is provided with a guide hole corresponding to the guide post. The guide post is placed in the guide hole, so that the small slider can only move in the vertical direction.

5. The demolding structure with delayed movement of large and small sliders under a single drive as described in claim 4, characterized in that: The bottom end of the shovel base is provided with a guide slope, and the two ends of the inclined surface of the shovel base, the top of the large slider and the sliding seat and the junction with the slope are all provided with arc-shaped chamfers.

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