Inclined top injection mold device in narrow space

Abstract

The utility model discloses a narrow space pitched roof injection mold device in the field of injection mold demolding, the structure comprises a pitched roof insert core, a workpiece, a first ejector rod, a mold core and a third ejector rod, one end of the pitched roof insert core is in contact with the end face of the first ejector rod, and the other end of the pitched roof insert core is connected with the workpiece through an inverted buckle formed in the injection molding process; a cup head is arranged at the other end of the first ejector rod, the first ejector rod is fixed on an ejector plate through the cup head, the ejector plate is mounted on the base, one end of the third ejector rod penetrates through the base and is fixedly connected with the ejector plate, and the other end of the third ejector rod is connected with an ejection mechanism of the injection molding machine; the pitched roof insert is assembled in the mold core, a fixing mechanism is further arranged at the parting surface of the mold core, and the fixing mechanism is assembled on the mold core; after injection molding is completed, when the mold is opened and a product is ejected out, an ejection mechanism of the injection molding machine drives the third ejector rod to push the ejector plate to move, and then the first ejector rod is pushed, so that the first ejector rod pushes the inclined ejector insert to move along the inclined ejector groove in the mold core and is separated from the inverted buckle on the workpiece, and ejection of the workpiece is completed. The device is convenient to disassemble and assemble, and is particularly suitable for smooth demolding of a mold in a narrow space.

Description

Technical Field

[0001] This utility model relates to a narrow space inclined top injection mold device, belonging to the field of injection mold demolding technology. Background Technology

[0002] In injection-molded products, especially those requiring secondary assembly, snap-fit ​​fittings are commonly used instead of screws for assembly. Demolding these snap-fit ​​fittings typically requires a slanted ejector mechanism. However, if other features on the product obstruct the ejector's retraction path, and space is insufficient, traditional slanted ejector designs must sacrifice strength, resulting in excessively long ejectors that are prone to deformation. This is particularly noticeable in small products such as computer keycaps. Furthermore, traditional slanted ejector structures cannot be disassembled from the front during production and maintenance, increasing machine downtime and worker workload. Utility Model Content

[0003] The purpose of this invention is to provide a narrow-space inclined ejector injection mold device that can solve the problems of excessively long inclined ejectors, weak strength, long ejection stroke, and difficult disassembly and assembly caused by space limitations in traditional molds. At the same time, it improves the stability, durability, and ease of maintenance of the mold, reduces production costs, and improves the quality and production efficiency of injection molded products.

[0004] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution.

[0005] On one hand, this utility model provides a narrow-space inclined ejector injection mold device, including an inclined ejector, a workpiece, a first ejector pin, and a third ejector pin. One end of the inclined ejector is in contact with the end face of the first ejector pin, and the other end is connected to the workpiece through an undercut formed during the injection molding process. The other end of the first ejector pin is provided with a cup head, and the first ejector pin is fixed to the ejector plate through the cup head. The ejector plate is mounted on a base. One end of the third ejector pin passes through the base and is fixedly connected to the ejector plate, and the other end is connected to the ejection mechanism of the injection molding machine. The inclined ejector is assembled in the mold core, and a fixing mechanism is also provided at the parting surface of the mold core. The fixing mechanism is assembled on the mold core.

[0006] After injection molding is completed, when the mold opens and ejects the product, the ejection mechanism of the injection molding machine drives the third ejector rod to push the ejector plate to move, which in turn pushes the first ejector rod, causing the first ejector rod to push the inclined ejector insert to move along the inclined ejector groove in the mold core and disengage from the undercut on the workpiece, thereby completing the ejection of the workpiece.

[0007] Preferably, when the undercut is located at the edge of the workpiece, the fixing mechanism includes a pressure block, which is fixed to the mold core by fasteners.

[0008] Preferably, the inclined top insert is provided with a stepped hanging platform, and the stepped hanging platform and the pressure block form an ejection stroke.

[0009] Preferably, when the undercut is located in the middle position of the workpiece, the fixing mechanism includes a pressure block and a fixing block, the fixing block is fixedly connected to a second push rod, and the pressure block fixes the fixing block to the bottom of the mold core by fasteners.

[0010] Preferably, the inclined insert is provided with a first T-slot, the second push rod is provided with a second T-slot, and the female end of the first T-slot is connected to the male end of the second T-slot.

[0011] Preferably, the angled ejector and the second ejector rod are connected by a T-slot and inserted into the angled slot of the angled ejector from the front of the mold core. After the angled ejector and the second ejector rod pass through the mold core, a spring and a fixing block are installed at the bottom of the mold core. The fixing block connects the second ejector rod to the fixing block through the pin.

[0012] Preferably, one end of the first push rod with a cup head is fixed to the push pin plate, and the other end is in contact with the bottom of the fixing block.

[0013] Preferably, when the third ejector rod drives the ejector plate to eject, the spring is in a compressed state, the first ejector rod pushes the fixed block, causing the fixed block to push the second ejector rod to move, and then the second ejector rod pushes the inclined ejector insert to move in the inclined ejector groove in the mold core, thereby causing the inclined ejector insert to disengage from the undercut in the workpiece;

[0014] When the angled ejector returns to its original position, the spring is in the released state. The spring pushes the fixed block, which in turn drives the second ejector rod to move back to its original position. The second ejector rod then drives the angled ejector to move in the angled ejector groove in the mold core, so that the angled ejector returns to the initial state of the mold core.

[0015] Preferably, it also includes a template, wherein the mold core is fixed in a template frame within the template.

[0016] Preferably, the ejector plate is provided with an ejection limiting post, and the ejection distance of the ejection limiting post is less than or equal to a preset value of the ejection stroke.

[0017] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0018] This invention's device adapts to injection molding needs in confined spaces. Through the coordinated action of the angled ejector, the workpiece, the first ejector rod, and the third ejector rod, precise ejection control is achieved. One end of the angled ejector contactes the end face of the first ejector rod, while the other end connects to the workpiece via a buckle formed during injection molding, ensuring effective separation of the angled ejector from the workpiece and completing the ejection process. The cup head of the first ejector rod is fixed to the ejector plate, which is mounted on the base. The third ejector rod connects to the ejector plate, ensuring that after injection molding, when the mold opens and the product is ejected, the third ejector rod effectively pushes the ejector plate, which in turn pushes the first ejector rod, causing the first ejector rod to push the angled ejector rod along the inclined groove and disengage from the buckle on the workpiece. This continuous action not only improves ejection efficiency but also reduces the risk of damage to the workpiece, thus improving product quality.

[0019] In addition, a fixing mechanism is provided at the parting surface of the mold core. This fixing mechanism, mounted on the mold core, enhances the overall stability and durability of the mold. This structural design allows the mold to maintain precise part positioning during high-pressure injection molding, reducing mold wear and deformation and extending the mold's service life. Attached Figure Description

[0020] Figure 1 The diagram shows a sloping top structure in a narrow space when the inverted buckle is located at the edge, as provided by this utility model.

[0021] Figure 2 The diagram shown is a schematic diagram of the narrow space inclined top structure provided by this utility model when the undercut is located at the edge; a schematic diagram of the narrow space inclined top injection mold structure.

[0022] Figure 3 The diagram shown is a schematic diagram of the narrow space inclined ejector structure provided by this utility model when the undercut is located at the edge. It is a side view of the narrow space inclined ejector injection mold structure.

[0023] Figure 4 The diagram shows a sloping top structure in a narrow space when the inverted buckle is in the middle position, as provided by this utility model.

[0024] Figure 5 The diagram shown is a schematic diagram of the narrow space inclined top structure provided by this utility model when the undercut is in the middle position; a schematic diagram of the narrow space inclined top injection mold structure.

[0025] Figure 6 The diagram shown is a side view of the narrow space inclined top structure of the injection mold provided by this utility model when the undercut is in the middle position.

[0026] In the diagram: 1. Angled ejector; 2. First ejector pin; 3. Pressure block; 4. Fastener; 5. Workpiece; 6. Fixing block; 7. Second ejector pin; 8. Spring; 9. Pin; 10. Ejection stroke; 11. Mold core; 12. Template; 13. Ejector plate; 14. Base; 15. Third ejector pin; 16. Ejection limit pin. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features therein are detailed descriptions of the present invention, rather than limitations thereof. In the absence of conflict, the embodiments of the present invention and the technical features therein can be combined with each other.

[0028] The term "and / or" simply describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship. Example 1

[0029] See Figures 1 to 6 This embodiment introduces a narrow-space inclined ejector injection mold device. This structure is particularly suitable for injection molding in narrow spaces and can effectively solve the problems of product interference or insufficient space in the molding retreat direction caused by the inclined ejector structure in traditional molds, such as excessively long and weak inclined ejectors. The structure includes an inclined ejector insert 1, a workpiece 5, a first ejector rod 2, and a third ejector rod 15. One end of the inclined ejector insert 1 contacts the end face of the first ejector rod 2, and the other end is connected to the workpiece 5 through an undercut formed during the injection process. The other end of the first ejector rod 2 is provided with a cup head, which is fixed to the ejector plate 13 by the cup head. The ejector plate 13 is mounted on the base 14.

[0030] Furthermore, one end of the third ejector rod 15 passes through the base 14 and is fixedly connected to the ejector plate 13, and the other end is connected to the ejection mechanism of the injection molding machine; the inclined ejector 1 is assembled in the inclined ejector groove in the mold core 11, and a fixing mechanism is also provided at the parting surface of the mold core 11, and the fixing mechanism is assembled on the mold core 11.

[0031] It should be noted that the structure of the fixing mechanism is different depending on the position of the inverted part 5.

[0032] After injection molding is completed, during the process of mold opening and ejecting the product, the ejection mechanism of the injection molding machine drives the third ejector rod 15 to push the ejector plate 13 to move, which in turn pushes the first ejector 2, causing the first ejector rod 2 to push the inclined ejector 1 to move along the inclined ejector groove in the mold core 11, thereby causing the inclined ejector 1 to disengage from the undercut on the workpiece 5, so as to complete the ejection process of the workpiece 5.

[0033] In summary, this device can significantly shorten the length of the ejector pin, reduce processing costs, and simultaneously increase the strength of the ejector pin while reducing deformation. The shorter ejector pin length also effectively reduces the mold ejection stroke, enabling correct assembly and disassembly, thereby reducing downtime for maintenance and repair, and improving production efficiency. Furthermore, this structure saves space, is simple and quick to install, and allows for standardization and interchangeability, further enhancing its practicality and economy in the field of injection mold release technology. Example 2

[0034] When the undercut is located at the edge of workpiece 5, its angled injection mold device is as follows: Figures 1 to 3 As shown, the fixing mechanism consists of only the pressure block 3, which is fixed to the mold core 11 by fasteners 4, such as screws, so that the angled ejector 1 can be stably assembled in the angled ejector groove in the mold core 11 and maintain a precise position during injection molding.

[0035] Furthermore, the inclined ejector 1 is provided with a stepped platform, and an ejection stroke 10 is formed between the stepped platform and the pressure block 3. The ejection stroke 10 is the area in which the inclined ejector 1 moves during the ejection process. Its size and shape are determined according to the specific size of the product barb and the angle of the inclined ejector 1, so as to ensure that the inclined ejector 1 can fully detach from the product barb within the ejection stroke 10.

[0036] In summary, the design of the angled ejector injection mold device when the undercut is at the edge not only improves the stability and reliability of the mold, but also enhances the stability of the angled ejector 1 in the ejection state, that is, at least 1 / 3 of the length of the angled ejector 1 is retained in the corresponding groove of the mold core 11.

[0037] Furthermore, the ejection stroke 10 helps reduce interference between the angled ejector 1 and other parts of the mold during the ejection process, thereby reducing the risk of wear and damage, extending the service life of the mold, and the device also allows for quick disassembly and assembly of the mold core 11 and related parts from the front, greatly simplifying the maintenance and upkeep process, reducing downtime caused by maintenance, and improving production efficiency. Example 3

[0038] See Figures 4 to 6 When the undercut is located in the middle position of the workpiece 5, the fixing mechanism includes not only the pressure block 3, but also the fixing block 6. The fixing block 6 is connected to the second push rod 7 through the pin 9, while the pressure block 3 fixes the fixing block 6 to the bottom of the mold core 11 through the fastener 4.

[0039] In another embodiment of the present invention, the inclined ejector 1 is provided with a first T-slot and the second ejector rod 7 is provided with a second T-slot. The female end of the first T-slot is connected to the male end of the second T-slot. The T-slot connection method provides a robust and precise connection mechanism to ensure the synchronous movement of the inclined ejector 1 and the second ejector rod 7 during the ejection process.

[0040] During assembly, the angled ejector 1 and the second ejector pin 7 are connected via a T-slot and then inserted into the angled slot of the angled ejector 1 from the front of the mold core 11. After the angled ejector 1 and the second ejector pin 7 have passed through the mold core 11, a spring 8 and a fixing block 6 are installed at the bottom of the mold core 11, and the second ejector pin 7 is connected to the fixing block 6 by a pin 9. This assembly sequence not only simplifies the installation process but also ensures the precise positioning and fixation of all components.

[0041] In another embodiment of this utility model, one end of the first ejector rod 2 with a cup head is fixed on the ejector plate 13, and the other end is in contact with the bottom of the fixing block 6. After injection molding is completed, when the mold opens and ejects the product, the third ejector rod 15 drives the ejector plate 13 to eject. At this time, the spring 8 is in a compressed state, the first ejector rod 2 pushes the fixing block 6, the fixing block 6 pushes the second ejector rod 7 to move, and then the second ejector rod 7 pushes the inclined ejector 1 to move in the mold core 11 in the inclined ejector groove, so that the inclined ejector 1 disengages from the undercut on the workpiece 5 and completes the ejection of the workpiece 5.

[0042] When the angled ejector 1 returns to its original position, the spring 8 is in the released state. The spring 8 pushes the fixed block 6, which in turn drives the second ejector rod 7 to move back to its original position. The second ejector rod 7 then drives the angled ejector 1 to move in the angled ejector groove in the mold core 11, thereby returning the angled ejector 1 to the initial state of the mold core 11.

[0043] The present invention relates to a narrow space inclined top injection mold device, which, in order to meet the injection requirements of different buckle positions, further includes a template 12. The mold core 11 is fixed in the template frame in the template 12, which allows the mold to perform precise injection molding in a limited space, while maintaining the stability of the mold and the convenience of operation.

[0044] In Embodiments 1 and 2, the ejector plate 13 is provided with an ejection limiting post 16, which controls the ejection distance during the mold ejection process. The ejection distance of the ejection limiting post 16 is set to be less than or equal to a preset value of the ejection stroke 10, ensuring that the angled ejector 1 can completely disengage from the undercut on the product 5 during the ejection process, while ensuring precise control of the ejection stroke 10 and avoiding product damage or mold damage that may be caused by excessive ejection.

[0045] By precisely controlling the ejection stroke, this device ensures consistent product quality and long-term mold durability. Furthermore, it helps reduce equipment failures and maintenance costs caused by improper ejection stroke control, facilitating mold maintenance and upkeep. It enables efficient and precise injection molding in confined spaces, while simultaneously reducing production costs and improving production efficiency and product quality.

[0046] The embodiments of the present utility model have been described above with reference to the accompanying drawings. However, the present utility model is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present utility model without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present utility model.

Claims

1. A narrow-space inclined injection mold device, characterized in that, The system includes an angled ejector (1), a workpiece (5), a first ejector rod (2), and a third ejector rod (15). One end of the angled ejector (1) is in contact with the end face of the first ejector rod (2), and the other end is connected to the workpiece (5) through an undercut formed during the injection molding process. The other end of the first ejector rod (2) is provided with a cup head, and the first ejector rod (2) is fixed on the ejector plate (13) through the cup head. The ejector plate (13) is installed on the base (14). One end of the third ejector rod (15) passes through the base (14) and is fixedly connected to the ejector plate (13), and the other end is connected to the ejection mechanism of the injection molding machine. The angled ejector (1) is assembled in the mold core (11), and a fixing mechanism is also provided at the parting surface of the mold core (11). The fixing mechanism is assembled on the mold core (11). After injection molding is completed, when the mold opens and ejects the product, the ejection mechanism of the injection molding machine drives the third ejector rod (15) to push the ejector plate (13) to move, thereby pushing the first ejector rod (2), so that the first ejector rod (2) pushes the inclined ejector insert (1) to move along the inclined ejector groove in the mold core (11) and disengage from the undercut on the workpiece (5) to complete the ejection of the workpiece (5).

2. The narrow-space inclined injection mold device according to claim 1, characterized in that, When the undercut is located at the edge of the workpiece (5), the fixing mechanism includes a pressure block (3), which is fixed to the mold core (11) by fasteners (4).

3. The narrow-space inclined injection mold device according to claim 2, characterized in that, The inclined top insert (1) is provided with a stepped hanging platform, and the stepped hanging platform and the pressure block (3) form an ejection stroke (10).

4. The narrow-space inclined injection mold device according to claim 1, characterized in that, When the undercut is located in the middle position of the workpiece (5), the fixing mechanism includes a pressure block (3) and a fixing block (6). The fixing block (6) is fixedly connected to a second push rod (7). The pressure block (3) fixes the fixing block (6) to the bottom of the mold core (11) by fasteners (4).

5. The narrow-space inclined injection mold device according to claim 4, characterized in that, The inclined top insert (1) is provided with a first T-shaped groove, and the second top rod (7) is provided with a second T-shaped groove. The female end of the first T-shaped groove is connected to the male end of the second T-shaped groove.

6. The narrow-space inclined injection mold device according to claim 5, characterized in that, After the inclined ejector (1) and the second ejector rod (7) are connected by a T-slot, they are inserted into the inclined slot of the inclined ejector (1) from the front of the mold core (11). After the inclined ejector (1) and the second ejector rod (7) pass through the mold core (11), a spring (8) and a fixing block (6) are installed at the bottom of the mold core (11). The fixing block (6) is connected to the second ejector rod (7) by a pin (9).

7. The narrow-space inclined injection mold device according to claim 6, characterized in that, The first push rod (2) has one end with a cup head fixed on the push pin plate (13), and the other end is in contact with the bottom of the fixing block (6).

8. The narrow-space inclined injection mold device according to claim 7, characterized in that, When the third ejector rod (15) pushes the ejector plate (13) out, the spring (8) is in a compressed state. The first ejector rod (2) pushes the fixing block (6), causing the fixing block (6) to push the second ejector rod (7) to move. Then the second ejector rod (7) pushes the inclined ejector insert (1) to move in the inclined ejector groove in the mold core (11), thereby causing the inclined ejector insert (1) to disengage from the undercut in the workpiece (5). When the angled ejector returns to its original position, the spring (8) is in a released state, causing the spring (8) to push the fixed block (6), which in turn drives the second ejector rod (7) to return to its original position. The second ejector rod (7) then drives the angled ejector (1) to move in the angled ejector groove in the mold core (11), so that the angled ejector (1) returns to the initial state of the mold core (11).

9. The narrow-space inclined injection mold device according to claim 1, characterized in that, It also includes a template (12), wherein the core (11) is fixed in the template frame of the template (12).

10. The narrow-space inclined injection mold device according to claim 1, characterized in that, The ejector plate (13) is provided with an ejection limiting post (16), and the ejection distance of the ejection limiting post (16) is less than or equal to the preset value of the ejection stroke (10).

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