Earphone charging box mold sequence opening structure

Abstract

The utility model relates to the field of injection moulding, and the utility model discloses a earphone charging box mould sequence opening mould structure, include: back mould essence, first line position mechanism and second line position mechanism, first line position mechanism includes first line position seat and first line position insert, and first line position insert both ends are equipped with parting surface and T -type groove respectively, and T -type groove sets up obliquely, and the one end of first line position seat is equipped with T -type sliding block close to back mould essence, and T -type sliding block sets up in T -type groove slidingly, and two recesses are symmetrically seted up on the parting surface of first line position insert, and every second line position mechanism includes second line position seat, inclined guide pillar, locating block and two forming assemblies, and inclined guide pillar penetrates second line position seat, and locating block is detachably set up in the one end of second line position seat close to back mould essence, and every forming assembly includes second line position insert and insert needle, and insert needle penetrates second line position insert, and second line position insert penetrates locating block. Guarantee opening and closing mould sequence normal, guarantee product concentricity.

Description

Technical Field

[0001] This utility model relates to the field of injection molding, and in particular to a sequential mold opening structure for an earphone charging case mold. Background Technology

[0002] Most TWS earphone charging cases on the market use a metal hinge assembly or magnet to open and close the lid, achieving a smooth rotation effect. During injection molding, a protruding part for mounting the metal hinge assembly needs to be formed at one end of the injection molded part, and holes for mounting the metal hinge need to be formed at both ends of this protrusion. Because the metal hinge assembly of the injection molded part needs to be concentric, the coaxiality of the holes at both ends of the protrusion needs to meet specifications. Furthermore, due to product structure limitations, multiple molding processes may occur without a specific order, easily leading to hole misalignment. Utility Model Content

[0003] The purpose of this utility model is to provide a sequential mold opening structure for an earphone charging case, which uses inserts to form holes for installing metal shafts, and the inserts are released sequentially.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a sequential mold opening structure for an earphone charging case, comprising: a rear mold core, a first sliding mechanism, and a second sliding mechanism.

[0005] The rear mold core has a main channel at its center, and the rear mold core has a number of cavities evenly spaced around the main channel. The first sliding mechanism is arranged in a one-to-one correspondence with the cavity. The first sliding mechanism is distributed on the side of the cavity away from the main channel, and the second sliding mechanism is provided on both sides of each first sliding mechanism.

[0006] The first sliding mechanism includes a first sliding seat and a first sliding insert. The first sliding insert has a parting surface and a T-slot at both ends, respectively. The T-slot is inclined. The first sliding seat has a T-slider at one end near the rear mold core. The T-slider is slidably disposed in the T-slot. Two grooves are symmetrically formed on the parting surface of the first sliding insert.

[0007] Each of the second sliding mechanisms includes a second sliding seat, an inclined guide post, a positioning block, and two molding components. The inclined guide post passes through the second sliding seat, and the positioning block is detachably disposed at one end of the second sliding seat near the rear mold core. Each molding component includes a second sliding insert and an insert pin. The insert pin passes through the second sliding insert, and the second sliding insert passes through the positioning block. The ends of the second sliding insert and the insert pin away from the rear mold core are both clamped between the positioning block and the second sliding seat.

[0008] Preferably, the positioning block has a first receiving groove at the end away from the rear mold core, and the second sliding insert has an outer mounting platform at the end away from the rear mold core. The outer mounting platform is disposed inside the first receiving groove, and the bottom of the first receiving groove has a first through hole. The second sliding insert is clearance-fitted with the first through hole, and the cross-section of the first through hole is smaller than the cross-section of the outer mounting platform.

[0009] Preferably, the outer mounting platform has a second receiving groove in the middle, and the end of the insert pin away from the rear mold core has an inner mounting platform. The inner mounting platform is located inside the second receiving groove, and the bottom of the second receiving groove has a second through hole. The insert pin is clearance-fitted with the second through hole, and the cross-section of the second through hole is smaller than the cross-section of the inner mounting platform.

[0010] Preferably, the second row seat has a stepped groove at one end near the rear mold core, and the positioning block is disposed inside the stepped groove.

[0011] Preferably, the bottom of the stepped groove is provided with a long strip-shaped protrusion, the bottom surface of the positioning block is provided with a positioning groove, and the protrusion and the positioning groove are fitted with a clearance.

[0012] Preferably, the second receiving groove is a rounded rectangle, and the diameter of the insert is smaller than the width of the rounded rectangle.

[0013] Preferably, the inner mounting platform has a circular cross-section, and the height of the inner mounting platform is equal to the width of the second receiving groove.

[0014] Preferably, the two grooves are arranged coaxially.

[0015] Preferably, the sequential mold opening structure of the earphone charging case mold further includes an A plate and a screw. The A plate is disposed above the rear mold core. The A plate has a countersunk hole. One end of the screw is slidably disposed in the countersunk hole, and the other end of the screw is threadedly connected to the first row seat.

[0016] Preferably, the countersunk hole includes a large hole and a small hole, which are connected sequentially in the direction toward the rear mold core. One end of the screw is slidably disposed inside the large hole, and the middle part of the screw passes through the small hole. The depth of the large hole is less than the stroke of the A plate when the mold is opened.

[0017] The beneficial effects of this utility model are as follows: it ensures that the first and second sliding mechanisms move sequentially during mold opening. During mold closing, the first sliding insert closes first, followed by the second sliding insert and insert pin, which are then inserted into the first sliding insert. During mold opening, the second sliding insert and insert pin lock the position of the first sliding insert, delaying its movement. After the second sliding insert and insert pin have opened, the first sliding insert is driven by the first sliding seat to open the mold, thus completing the mold opening action. This ensures a normal mold opening and closing sequence and guarantees product concentricity. Attached Figure Description

[0018] The accompanying drawings further illustrate the present invention, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0019] Figure 1 This is a schematic diagram of a structure provided for an embodiment of the present utility model;

[0020] Figure 2 A half-sectional view provided for an embodiment of this utility model;

[0021] Figure 3 for Figure 1 A magnified view of a portion of region E in the middle;

[0022] Figure 4 for Figure 2 A magnified view of a portion of region D in the middle;

[0023] Figure 5 A partial cross-sectional view provided for an embodiment of this utility model;

[0024] Markings in the diagram: 1: Rear mold core; 2: First row seat; 3: First row insert; 4: Second row seat; 5: Angled guide pillar; 6: Positioning block; 7: Molding component; 8: Second row insert; 9: Insert pin; 10: Outer mounting platform; 11: Inner mounting platform; 12: A plate. Detailed Implementation

[0025] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0026] It should be noted that, in this utility model, unless otherwise stated, when an element is referred to as "connected to" or "set on" another element, it can be directly on the other element or may have an intervening element present simultaneously. "Inner" and "outer" refer to the inner and outer contours of a specific part. "Far" and "near" refer to the far and near relative to a certain component.

[0027] like Figures 1-5 As shown in the figure, an embodiment of the present invention provides a sequential mold opening structure for an earphone charging case, comprising: a rear mold core 1, a first sliding mechanism, and a second sliding mechanism.

[0028] The rear mold core 1 has a main channel at its center, and the rear mold core 1 has a number of cavities evenly spaced around the main channel. The first sliding mechanism is arranged in a one-to-one correspondence with the cavity. The first sliding mechanism is distributed on the side of the cavity away from the main channel, and the second sliding mechanism is provided on both sides of each first sliding mechanism.

[0029] The first sliding mechanism includes a first sliding seat 2 and a first sliding insert 3. The first sliding insert 3 has a parting surface and a T-slot at both ends, respectively. The T-slot is inclined. The first sliding seat 2 has a T-slider at one end near the rear mold core 1. The T-slider is slidably disposed in the T-slot. Two grooves are symmetrically formed on the parting surface of the first sliding insert 3.

[0030] Each of the second sliding mechanisms includes a second sliding seat 4, an inclined guide post 5, a positioning block 6, and two molding components 7. The inclined guide post 5 passes through the second sliding seat 4, and the positioning block 6 is detachably disposed at one end of the second sliding seat 4 near the rear mold core 1. Each molding component 7 includes a second sliding insert 8 and an insert pin 9. The insert pin 9 passes through the second sliding insert 8, and the second sliding insert 8 passes through the positioning block 6. The ends of the second sliding insert 8 and the insert pin 9 away from the rear mold core 1 are both clamped between the positioning block 6 and the second sliding seat 4.

[0031] During mold opening, the first sliding insert 3 is locked in place by the second sliding insert 8 and the insert pin 9, delaying its opening motion. After the second sliding insert 8 and the insert pin 9 have opened, the screw is engaged with the countersunk hole, pulling the first sliding seat 2. The first sliding seat 2 then drives the first sliding insert 3 to open the mold, completing the mold opening action. During mold closing, the first sliding insert 3 closes to the rear mold core 1 first, followed by the second sliding insert 8 and the insert pin 9. This ensures a proper mold opening and closing sequence and guarantees product concentricity.

[0032] The positioning block 6 has a first receiving groove at its end away from the rear mold core 1, and the second sliding insert 8 has an outer mounting platform 10 at its end away from the rear mold core 1. The outer mounting platform 10 is disposed inside the first receiving groove, and the bottom of the first receiving groove has a first through hole. The second sliding insert 8 is clearance-fitted with the first through hole, and the cross-section of the first through hole is smaller than the cross-section of the outer mounting platform 10. The outer mounting platform 10 is positioned by the first receiving groove, and the outer mounting platform 10 will move synchronously with the positioning block 6, avoiding relative displacement between the second sliding insert 8 and the positioning block 6.

[0033] The outer mounting platform 10 has a second receiving groove in its middle. An inner mounting platform 11 is located at the end of the insert pin 9 furthest from the rear mold core 1. The inner mounting platform 11 is situated inside the second receiving groove. A second through hole is located at the bottom of the second receiving groove. The insert pin 9 is clearance-fitted with the second through hole, and the cross-section of the second through hole is smaller than the cross-section of the inner mounting platform 11. The inner mounting platform 11 is positioned by the second receiving groove, and it will move synchronously with the outer mounting platform 10, preventing relative displacement between the insert pin 9 and the second sliding insert 8.

[0034] The second row of seat 4 has a stepped groove at one end near the rear mold core 1, and the positioning block 6 is disposed inside the stepped groove. The positioning block 6 is accommodated by the stepped groove.

[0035] The bottom of the stepped groove is provided with a long strip-shaped protrusion, and the bottom surface of the positioning block 6 is provided with a positioning groove. The protrusion and the positioning groove are fitted with a clearance. The position of the positioning block 6 is accurately positioned by the protrusion, ensuring that both the inner mounting platform 11 and the outer mounting platform 10 abut against the second row seat 4.

[0036] The second receiving groove is a rounded rectangle, and the diameter of the insert 9 is smaller than the width of the rounded rectangle. The inner mounting platform 11 is accommodated by the second receiving groove. During the mold opening movement, the inner mounting platform 11 is held in the second receiving groove, and the insert 9 moves together with the second sliding insert 8, which is also easy to disassemble.

[0037] The inner mounting platform 11 has a circular cross-section, and its height is equal to the width of the second receiving groove. The inner mounting platform 11 can be machined using ordinary ejector pins, reducing the machining difficulty of the inner mounting platform 11. The position of the inner mounting platform 11 is positioned by the second receiving groove.

[0038] The two grooves are coaxially arranged. The coaxiality of the holes at both ends of the protruding portion of the injection molded part must meet the specified requirements.

[0039] The sequential mold opening structure of the earphone charging case mold also includes an A plate 12 and screws. The A plate 12 is disposed above the rear mold core 1. The A plate 12 has a countersunk hole. One end of the screw is slidably disposed in the countersunk hole, and the other end of the screw is threadedly connected to the first row seat 2. The first row seat 2 and the A plate 12 are connected by screws. The A plate 12 pulls the first row seat 2 upward. The first row seat 2 drives the first row insert 3 away from or towards the rear mold core 1 through an inclined T-slot.

[0040] The countersunk hole includes a large hole and a small hole, which are connected sequentially in the direction towards the rear mold core 1. One end of the screw is slidably disposed inside the large hole, and the middle of the screw passes through the small hole. The depth of the large hole is less than the mold opening stroke of plate A 12. During mold opening, plate A 12 moves away from the rear mold core 1, and the screw head slides along the large hole until the screw head contacts the bottom of the groove in the large hole. Only when the screw head is engaged with the bottom of the groove in the large hole does the first sliding mechanism begin to open the mold, thus delaying the mold opening movement of the first sliding mechanism.

[0041] The technical features of the embodiments described above can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these should all be considered to be within the scope of this specification.

Claims

1. A sequential mold opening structure for an earphone charging case, characterized in that: Includes: rear mold core, first sliding mechanism, and second sliding mechanism. The rear mold core has a main channel at its center, and the rear mold core has a number of cavities evenly spaced around the main channel. The first sliding mechanism is arranged in a one-to-one correspondence with the cavity. The first sliding mechanism is distributed on the side of the cavity away from the main channel, and the second sliding mechanism is provided on both sides of each first sliding mechanism. The first sliding mechanism includes a first sliding seat and a first sliding insert. The first sliding insert has a parting surface and a T-slot at both ends, respectively. The T-slot is inclined. The first sliding seat has a T-slider at one end near the rear mold core. The T-slider is slidably disposed in the T-slot. Two grooves are symmetrically formed on the parting surface of the first sliding insert. Each of the second sliding mechanisms includes a second sliding seat, an inclined guide post, a positioning block, and two molding components. The inclined guide post passes through the second sliding seat, and the positioning block is detachably disposed at one end of the second sliding seat near the rear mold core. Each molding component includes a second sliding insert and an insert pin. The insert pin passes through the second sliding insert, and the second sliding insert passes through the positioning block. The ends of the second sliding insert and the insert pin away from the rear mold core are both clamped between the positioning block and the second sliding seat.

2. The sequential mold opening structure of the earphone charging case mold according to claim 1, characterized in that: The positioning block has a first receiving groove at one end away from the rear mold core, and the second sliding insert has an outer mounting platform at one end away from the rear mold core. The outer mounting platform is located inside the first receiving groove. The bottom of the first receiving groove has a first through hole. The second sliding insert is clearance-fitted with the first through hole. The cross-section of the first through hole is smaller than the cross-section of the outer mounting platform.

3. The sequential mold opening structure of the earphone charging case mold according to claim 2, characterized in that: The outer mounting platform has a second receiving groove in the middle, and the end of the insert pin away from the rear mold core has an inner mounting platform. The inner mounting platform is located inside the second receiving groove. The bottom of the second receiving groove has a second through hole. The insert pin is clearance-fitted with the second through hole. The cross-section of the second through hole is smaller than the cross-section of the inner mounting platform.

4. The sequential mold opening structure of the earphone charging case mold according to claim 1, characterized in that: The second row of seats has a stepped groove at one end near the rear mold core, and the positioning block is disposed inside the stepped groove.

5. The sequential mold opening structure of the earphone charging case mold according to claim 4, characterized in that: The bottom of the stepped groove is provided with a long strip-shaped protrusion, and the bottom surface of the positioning block is provided with a positioning groove, with the protrusion and the positioning groove fitting together with a clearance.

6. The sequential mold opening structure of the earphone charging case mold according to claim 3, characterized in that: The second receiving groove is a rounded rectangle, and the diameter of the insert is smaller than the width of the rounded rectangle.

7. The sequential mold opening structure of the earphone charging case mold according to claim 6, characterized in that: The inner mounting platform has a circular cross-section, and its height is equal to the width of the second receiving groove.

8. The sequential mold opening structure of the earphone charging case mold according to claim 1, characterized in that: The two grooves are arranged coaxially.

9. The sequential mold opening structure of the earphone charging case mold according to claim 1, characterized in that: The sequential mold opening structure of the earphone charging case mold also includes an A plate and a screw. The A plate is located above the rear mold core and has a countersunk hole. One end of the screw is slidably disposed in the countersunk hole, and the other end of the screw is threadedly connected to the first row seat.

10. The sequential mold opening structure of the earphone charging case mold according to claim 9, characterized in that: The countersunk hole includes a large hole and a small hole, which are connected sequentially in the direction toward the rear mold core. One end of the screw is slidably disposed inside the large hole, and the middle of the screw passes through the small hole. The depth of the large hole is less than the stroke of the A plate when the mold is opened.

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