A multi-stage ejection sequence tripping mechanism and an injection mold

Abstract

The present invention provides a multi-stage ejecting sequential unlocking mechanism and an injection mold. The multi-stage ejecting sequential unlocking mechanism includes a sequential unlocking assembly, a first ejector plate, a second ejector plate, and a third ejector plate. The sequential unlocking assembly includes a primary unlocking device, a secondary unlocking device, a locking hook, and a driving block. Both the primary unlocking device and the secondary unlocking device include a buckling plate that can slide horizontally and an elastic member. The buckling plate is buckled on the locking hook under the drive of the elastic member. The driving block is provided with a first inclined surface that forms a guiding fit with the buckling plate of the primary unlocking device, a vertical surface that forms a guiding fit with the buckling plate of the secondary unlocking device, and a second inclined surface located above the vertical surface. The downward movement of the driving block forces the buckling plates of the primary unlocking device and the secondary unlocking device to disengage from the locking hook successively. It can achieve the sequential action of first ejecting all together and then releasing step by step.

Description

Technical Field

[0001] The present invention relates to the field of injection molds, and particularly to a multi-stage ejection sequence unlocking mechanism and an injection mold having the multi-stage ejection sequence unlocking mechanism. Background Art

[0002] An injection mold is a tool for producing plastic products; it is also a tool for endowing plastic products with a complete structure and precise dimensions. Injection molding using an injection mold is a processing method used in mass-producing some parts with complex shapes. Specifically, it means injecting the heat-melted plastic into the mold cavity under high pressure by an injection molding machine, and after cooling and solidifying, a formed product is obtained.

[0003] An injection mold consists of a moving mold and a fixed mold. The moving mold is installed on the moving template of the injection molding machine, and the fixed mold is installed on the fixed template of the injection molding machine. During injection molding, the moving mold and the fixed mold are closed to form a gating system and a cavity. When the mold is opened, the moving mold and the fixed mold are separated, and the product is ejected by the ejector pins on the moving mold.

[0004] According to the characteristics of the product, the existing ejection methods of ejector pins include direct ejection at one time, and there is also a method of ejecting a part first and then ejecting synchronously. The implemented structures are all relatively simple. However, in some cases where the structure is relatively complex and requires a sequential action of first ejecting all together and then releasing step by step (not ejecting after release), the existing mechanisms cannot achieve this. A new design is needed. Summary of the Invention

[0005] Therefore, to solve the above problems, the present invention provides a multi-stage ejection sequence unlocking mechanism and an injection mold having the multi-stage ejection sequence unlocking mechanism.

[0006] To achieve the above object, the technical solution provided by the present invention is as follows:

[0007] A multi-stage ejection sequence unlocking mechanism includes: a sequential unlocking component, and a first ejector plate, a second ejector plate, and a third ejector plate which are sequentially stacked from bottom to top. The sequential unlocking component includes a primary unlocking device assembled on the first ejector plate, a secondary unlocking device assembled on the second ejector plate, a locking hook passing through the first ejector plate and the second ejector plate and fixed on the third ejector plate, and a driving block passing through the first ejector plate, the second ejector plate, and the third ejector plate and higher than the third ejector plate. Both the primary unlocking device and the secondary unlocking device include a buckling plate that can slide horizontally and an elastic member. The buckling plate is buckled on the locking hook under the drive of the elastic member. The driving block is provided with a first inclined surface that forms a guiding fit with the buckling plate of the primary unlocking device, a vertical surface that forms a guiding fit with the buckling plate of the secondary unlocking device, and a second inclined surface located above the vertical surface. The downward movement of the driving block forces the buckling plates of the primary unlocking device and the secondary unlocking device to disengage from the locking hook successively.

[0008] Furthermore, the buckle plate and elastic member of the primary release are defined as the first buckle plate and the first elastic member, and the buckle plate and elastic member of the secondary release are defined as the second buckle plate and the second elastic member; the lock hook is provided with a first snap-in slot corresponding to the first buckle plate and a second snap-in slot corresponding to the second buckle plate; the first buckle plate is snapped onto the first snap-in slot under the drive of the first elastic member, and the second buckle plate is snapped onto the second snap-in slot under the drive of the second elastic member.

[0009] Furthermore, the first elastic member is a first spring, and a accommodating blind hole is provided on a side of the first buckle plate away from the lock hook. The first spring is assembled in the accommodating blind hole of the first buckle plate and abuts against the first ejector plate.

[0010] Furthermore, the second elastic member is a second spring, and a accommodating blind hole is provided on a side of the second buckle plate away from the lock hook. The second spring is assembled in the accommodating blind hole of the second buckle plate and abuts against the second ejector plate.

[0011] Furthermore, a first accommodating groove is provided on the first ejector plate, and the primary release is assembled in the first accommodating groove. The primary release also includes a first fixing plate, which is fixed to the first ejector plate. The first clip plate can be horizontally slidable between the bottom of the first accommodating groove and the first fixing plate.

[0012] Furthermore, a second accommodating groove is provided on the second ejector plate, and the secondary release is assembled in the second accommodating groove. The secondary release also includes a second fixed plate, which is fixed to the second ejector plate. The second clip plate can be horizontally slidable between the bottom of the second accommodating groove and the second fixed plate.

[0013] Furthermore, the sequential release assembly also includes a guide seat, which is fixed on the third ejector plate. A guide hole is provided on the guide seat, and the drive block is inserted into the guide hole of the guide seat.

[0014] An injection mold comprises at least the above-mentioned multi-stage ejection sequence release mechanism.

[0015] The technical solution provided by the present invention has the following beneficial effects:

[0016] This multi-stage ejection sequential release mechanism enables the synchronous ejection of the first, second, and third ejector plates. At a certain ejection position, it forces the first and second ejector plates to be released sequentially, achieving a sequential action of ejecting all at once and then releasing them step by step (no ejection after release). It also features a simple structure, low cost, and ingenious design. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1The figure shows the external schematic diagram of the multi-stage ejection sequence unlocking mechanism in the embodiment;

[0018] Figure 2 The figure shows the external schematic diagram of the sequence unlocking component in the embodiment;

[0019] Figure 3 The figure shows the exploded structural schematic diagram of the sequence unlocking component in the embodiment;

[0020] Figure 4 The figure shows the cross-sectional view of the multi-stage ejection sequence unlocking mechanism in the initial state in the embodiment;

[0021] Figure 5 The figure shows the cross-sectional view of the multi-stage ejection sequence unlocking mechanism in the state where the first buckling plate is disengaged from the locking hook in the embodiment;

[0022] Figure 6 The figure shows the cross-sectional view of the multi-stage ejection sequence unlocking mechanism in the state where the second buckling plate is disengaged from the locking hook in the embodiment;

[0023] Figure 7 The figure shows the cross-sectional view of the multi-stage ejection sequence unlocking mechanism in the state where the ejection is completed in the embodiment. Detailed implementation manners

[0024] To further illustrate each embodiment, the present invention provides accompanying drawings. These accompanying drawings are a part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used to explain the operating principle of the embodiments in combination with the relevant descriptions in the specification. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0025] Now, the present invention will be further described in combination with the accompanying drawings and the detailed implementation manners.

[0026] Refer to Figures 1 to 3As shown in the figure, this embodiment provides a multi-stage ejection sequence unlocking mechanism, including: a sequence unlocking component 20, and a first ejector plate 11, a second ejector plate 12, and a third ejector plate 13 that are stacked in sequence from bottom to top. The first ejector plate 11, the second ejector plate 12, and the third ejector plate 13 are all used to install ejector pins. The sequence unlocking component 20 includes a primary unlocking device 21 assembled on the first ejector plate 11, a secondary unlocking device 22 assembled on the second ejector plate 12, a locking hook 23 that penetrates through the first ejector plate 11 and the second ejector plate 12 and is fixed on the third ejector plate 13, and a driving block 24 that penetrates through the first ejector plate 11, the second ejector plate 12, and the third ejector plate 13 and is higher than the third ejector plate 13; both the primary unlocking device 21 and the secondary unlocking device 22 include a buckling plate that can slide horizontally and an elastic member. Specifically, the buckling plate and the elastic member of the primary unlocking device 21 are defined as a first buckling plate 211 and a first elastic member 212, and the buckling plate and the elastic member of the secondary unlocking device 22 are defined as a second buckling plate 221 and a second elastic member 222.

[0027] The buckling plate is buckled on the locking hook 23 under the drive of the elastic member, that is, the first buckling plate 211 is buckled on the locking hook 23 under the drive of the first elastic member 21; the second buckling plate 221 is buckled on the locking hook 23 under the drive of the second elastic member 222.

[0028] The driving block 24 is provided with a first inclined surface 241 that forms a guiding fit with the buckling plate (i.e., the first buckling plate 211) of the primary unlocking device 21, a vertical surface 242 that forms a guiding fit with the buckling plate (i.e., the second buckling plate 221) of the secondary unlocking device 22, and a second inclined surface 243 located above the vertical surface 242; the downward movement of the driving block 24 forces the buckling plates of the primary unlocking device 21 (i.e., the first buckling plate 211) and the secondary unlocking device 22 (i.e., the second buckling plate 221) to disengage from the locking hook 23 in sequence.

[0029] When ejecting, in the first stage, as Figure 4 shown, the driving mechanism (such as a cylinder) pushes the third ejector plate 13 to jack up. At this time, the third ejector plate 13 simultaneously jacks up the first ejector plate 11 and the second ejector plate 12 through the locking hook 23, and the driving block 24 also moves together; when jacked up to a certain height, the driving block 24 is limited, such as the driving block 24 abuts against the lower template of the mold and cannot continue to move up.

[0030] In the second stage, as Figure 5As shown, the continued upward movement of the third ejector plate 13 causes the driving block 24 to move downward relative to the first ejector plate 11, the second ejector plate 12 and the third ejector plate 13. The buckle plate of the primary release 21 (i.e., the first buckle plate 211) cooperates with the guiding of the first inclined surface 241 of the driving block 24, forcing the first buckle plate 211 to overcome the action of the first elastic member 212 and disengage from the lock hook 23, causing the first ejector plate 11 to be released, i.e., stop moving up and out; and in this process, the second buckle plate 221 cooperates with the vertical surface 242 of the driving block 24 to enable the second buckle plate 221 to continue to be clamped on the lock hook 23, thereby causing the second ejector plate 12 to continue to be driven to move up and out.

[0031] In the third stage, if Figure 6 As shown, the third ejector plate 13 continues to move upward, that is, the driving block 24 continues to move downward relative to the second ejector plate 12 and the third ejector plate 13, and the second inclined surface 243 of the driving block 24 is guided and matched with the buckle plate (that is, the second buckle plate 221) of the secondary release 22, and forces the second buckle plate 221 to overcome the action of the second elastic member 222 and disengage from the lock hook 23, causing the second ejector plate 12 to be released, that is, stop moving up and ejecting.

[0032] In the fourth stage, if Figure 7 As shown, the third ejector plate 13 moves upward independently to finally complete the ejection action.

[0033] This multi-stage ejection sequential release mechanism enables the synchronous ejection of the first, second, and third ejector plates 11, 12, and 13. At a certain ejection position, it forces the first and second ejector plates 11, 12 to be released sequentially, thereby achieving a sequential action of ejecting all at once and then releasing them step by step (no ejection after release). It also features a simple structure, low cost, and ingenious design.

[0034] The lock hook 23 is provided with a first snap-in notch 231 corresponding to the first snap-in plate 211 and a second snap-in notch 232 corresponding to the second snap-in plate 221. The first snap-in plate 211 is snapped onto the first snap-in notch 231 under the drive of the first elastic member 212, and the second snap-in plate 221 is snapped onto the second snap-in notch 232 under the drive of the second elastic member 222. This facilitates the snapping of the first and second snap-in plates 211, 221, and the lock hook 23, and the structural design is simple.

[0035] Specifically, the first elastic member 212 is a first spring. A blind hole 2111 is defined on the side of the first gusset plate 211 facing away from the lock hook. The first spring is assembled within the blind hole 2111 of the first gusset plate 211 and abuts against the first ejector plate 11. This allows for a simple and stable assembly of the first elastic member 212. More specifically, there are two first springs, arranged side by side, for uniform force.

[0036] Similarly, the second elastic member 222 is also a spring, that is, the second elastic member 222 is the second spring. A receiving blind hole 2211 is formed on the side of the second buckle plate 221 away from the locking hook 23. The second spring is assembled in the receiving blind hole 2211 of the second buckle plate 221 and abuts against the second ejector plate 12 to achieve stable assembly of the second spring. Specifically, the number of the second springs is also two, arranged side by side, and the acting force is uniform.

[0037] The above structures and assembly methods of the first elastic member 212 and the second elastic member 222 are both relatively preferred solutions. Of course, in other embodiments, the structures and assembly methods of the first elastic member 212 and / or the second elastic member 222 are not limited thereto.

[0038] A first receiving groove is formed on the first ejector plate 11. The primary release device 21 is assembled in the first receiving groove. The primary release device 21 further includes a first fixing plate 213, and the first fixing plate 213 is fixed on the first ejector plate 11. The first buckle plate 211 is horizontally slidably restricted between the bottom of the first receiving groove and the first fixing plate 213, realizing the horizontally slidable assembly of the first buckle plate 211. And the assembly and disassembly operations are simple. That is, during assembly, the first buckle plate 211 and the first elastic member 212 can be placed in the first receiving groove, and then the first fixing plate 213 is covered and fixed. During disassembly, the first fixing plate 213 is removed.

[0039] Similarly, a second receiving groove is formed on the second ejector plate 12. The secondary release device 22 is assembled in the second receiving groove. The secondary release device 22 further includes a second fixing plate 223, and the second fixing plate 223 is fixed on the second ejector plate 12. The second buckle plate 221 is horizontally slidably restricted between the bottom of the second receiving groove and the second fixing plate 223, which also realizes the horizontally slidable assembly of the second buckle plate 221 and has the characteristics of simple assembly and disassembly operations.

[0040] Specifically, corresponding through holes are formed in the second fixing plate 223, the second buckle plate 221, the second ejector plate 12, the first fixing plate 213, the first buckle plate 211, and the first ejector plate 11 for the fixing block 24 to pass through.

[0041] The above structures and assembly methods of the primary release device 21 and the secondary release device 22 are both relatively preferred solutions. Of course, in other embodiments, the structures and assembly methods of the primary release device 21 and / or the secondary release device 22 are not limited thereto.

[0042] The sequential tripping assembly 20 further includes a guide seat 25 which is fixed on the third ejector plate 13. A guide hole 251 is formed in the guide seat 25, and the driving block 24 is inserted into the guide hole 251 of the guide seat 25 to realize the guiding assembly for the vertical lifting of the driving block 24, so that the driving block 24 is not easily displaced.

[0043] Further, this embodiment also provides an injection mold, which at least includes the multi-stage ejecting sequential tripping mechanism described above.

[0044] Although the present invention is specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all of them fall within the protection scope of the present invention.

Claims

1. A multi-stage ejection sequence tripping mechanism, characterized in that, Comprising: A sequential tripping component, a first ejector plate, a second ejector plate, and a third ejector plate that are stacked in sequence from bottom to top. The sequential tripping component includes a primary tripper assembled on the first ejector plate, a secondary tripper assembled on the second ejector plate, a locking hook that passes through the first ejector plate and the second ejector plate and is fixed on the third ejector plate, and a driving block that passes through the first ejector plate, the second ejector plate, and the third ejector plate and is higher than the third ejector plate. Both the primary tripper and the secondary tripper include a horizontally slidable clamping plate and an elastic member. The clamping plate is snapped onto the locking hook under the drive of the elastic member. The driving block is provided with a first inclined surface that forms a guiding fit with the clamping plate of the primary tripper, a vertical surface that forms a guiding fit with the clamping plate of the secondary tripper, and a second inclined surface located above the vertical surface. The downward movement of the driving block forces the clamping plates of the primary tripper and the secondary tripper to disengage from the locking hook successively.

2. The multi-stage ejection sequence tripping mechanism according to claim 1, wherein: Define the clamping plate and the elastic member of the primary tripper as the first clamping plate and the first elastic member, and the clamping plate and the elastic member of the secondary tripper as the second clamping plate and the second elastic member. The locking hook is provided with a first bayonet corresponding to the first clamping plate and a second bayonet corresponding to the second clamping plate. The first clamping plate is snapped onto the first bayonet under the drive of the first elastic member, and the second clamping plate is snapped onto the second bayonet under the drive of the second elastic member.

3. The multi-stage ejection sequence tripping mechanism according to claim 2, wherein: The first elastic member is a first spring. A receiving blind hole is provided on the side of the first clamping plate facing away from the locking hook. The first spring is assembled in the receiving blind hole of the first clamping plate and abuts against the first ejector plate.

4. The multi-stage ejection sequence tripping mechanism according to claim 2, characterized in that: The second elastic member is a second spring. A receiving blind hole is provided on the side of the second clamping plate facing away from the locking hook. The second spring is assembled in the receiving blind hole of the second clamping plate and abuts against the second ejector plate.

5. The multi-stage ejection sequence tripping mechanism according to claim 2, characterized in that: A first receiving groove is provided on the first ejector plate. The primary tripper is assembled in the first receiving groove. The primary tripper further includes a first fixing plate that is fixed to the first ejector plate. The first clamping plate is horizontally slidably restricted between the bottom of the first receiving groove and the first fixing plate.

6. The multi-stage ejection sequence tripping mechanism according to claim 2, characterized in that: A second receiving groove is provided on the second ejector plate. The secondary tripper is assembled in the second receiving groove. The secondary tripper further includes a second fixing plate that is fixed to the second ejector plate. The second clamping plate is horizontally slidably restricted between the bottom of the second receiving groove and the second fixing plate.

7. The multi-stage ejection sequence tripping mechanism according to claim 1, characterized in that: The sequential tripping component further includes a guiding seat that is fixed on the third ejector plate. A guiding hole is provided on the guiding seat. The driving block passes through the guiding hole of the guiding seat.

8. An injection mold, characterized in that: At least including the multi-stage ejection sequential tripping mechanism according to any one of claims 1 to 7.

Images