Inclined top injection mold device in narrow space

Abstract

The invention discloses a narrow space inclined ejection injection mold device in the field of injection mold demolding, the structure comprises an inclined ejection insert core, a workpiece, a first ejection rod, a mold core and a third ejection rod, one end of the inclined ejection insert core is in contact with the end face of the first ejection rod, and the other end of the inclined ejection 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, especially for smooth demolding of a mold in a narrow space.

Description

Technical Field

[0001] The invention relates to a narrow space inclined top injection mold device, belonging to the technical field of injection mold demoulding. Background Art

[0002] In injection molded products, especially those that require secondary assembly, it is common to use clips instead of screws for assembly, and the demolding of the clips usually requires a sloping roof structure. However, if there are other features on the product that hinder the retreat path of the sloping roof and there is insufficient space, the traditional sloping roof design needs to sacrifice strength, resulting in the sloping roof being too long and easy to deform, which is particularly obvious on small products such as computer keycaps. In addition, the traditional sloping roof structure cannot be disassembled from the front during production maintenance, which will increase machine downtime and worker workload. Summary of the invention

[0003] The purpose of the present invention is to provide a narrow space inclined ejector injection mold device, which can solve the problems of traditional molds such as too long inclined ejector, weak strength, long ejection stroke, and difficult disassembly and assembly due to space limitations, while improving the stability, durability and maintenance convenience of the mold, reducing production costs, and improving the quality and production efficiency of injection molded products.

[0004] In order to solve the above technical problems, the present invention is implemented by adopting the following technical solutions.

[0005] On the one hand, the present invention provides a narrow space inclined ejector injection mold device, comprising an inclined ejector, a workpiece, a first ejector rod and a third ejector rod, one end of the inclined ejector rod contacts the end surface of the first ejector rod, 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 rod is provided with a cup head, the first ejector rod is fixed to an ejector plate through the cup head, the ejector plate is installed on a base, one end of the third ejector rod 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 rod is assembled in the mold core, and a fixing mechanism is also arranged at the parting surface of the mold core, and the fixing mechanism is assembled on the mold core; After the injection molding is completed, when the mold is opened to eject the product, the ejection mechanism of the injection molding machine drives the third ejector rod to push the ejector plate to move, and then pushes the first ejector rod, so that the first ejector rod pushes the inclined ejector to move along the inclined ejector groove in the mold core and disengage from the undercut on the workpiece to complete the ejection of the workpiece.

[0006] Preferably, when the undercut is located at the edge of the workpiece, the fixing mechanism comprises a pressing block, and the pressing block is fixed to the mold core by a fastener.

[0007] Preferably, the inclined ejector is provided with a step hanging platform, and an ejection space is formed between the step hanging platform and the pressing block.

[0008] Preferably, when the undercut is located in the middle of the workpiece, the fixing mechanism comprises a pressing block and a fixing block, the fixing block is fixedly connected to a second push rod, and the pressing block fixes the fixing block to the bottom of the mold core through a fastener.

[0009] Preferably, the inclined ejector is provided with a first T-slot, the second ejector 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.

[0010] Preferably, the inclined ejector and the second ejector rod are connected by a T-slot and then inserted into the inclined slot in the inclined ejector from the front side of the mold core. After the inclined 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.

[0011] Preferably, one end of the first ejector rod provided with a cup head is fixed on the ejector plate, and the other end is in contact with the bottom of the fixing block.

[0012] Preferably, when the third ejector drives the ejector plate to eject, the spring is in a compressed state, the first ejector pushes the fixed block, so that the fixed block pushes the second ejector to move, and then the second ejector pushes the inclined ejector to move in the inclined ejector groove in the mold core, so that the inclined ejector is separated from the undercut in the workpiece; When the inclined ejector returns to its position, the spring is in a released state, and the spring pushes the fixed block, thereby driving the second ejector rod to return and move, and the second ejector rod then drives the inclined ejector to move in the inclined ejector groove in the mold core, so that the inclined ejector returns to the initial state of the mold core.

[0013] Preferably, it also includes a template, and the mold core is fixed in a template frame in the template.

[0014] Preferably, an ejection limiting column is provided on the ejector plate, and an ejection distance of the ejection limiting column is less than or equal to a preset value of the ejection stroke.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The device of the present invention can adapt to the injection molding needs in a narrow space, and realizes precise ejection control through the coordinated action of the inclined ejector, the workpiece, the first ejector rod and the third ejector rod. One end of the inclined ejector rod contacts the end face of the first ejector rod, and the other end is connected to the workpiece through the undercut formed during the injection molding process, ensuring that the inclined ejector rod can be effectively separated from the workpiece to complete the ejection process. The cup head of the first ejector rod is fixed on the ejector plate, and the ejector plate is installed on the base. The third ejector rod is connected to the ejector plate to ensure that after the injection molding is completed, when the mold is opened to eject the product, the third ejector rod can effectively push the ejector plate to move, and then push the first ejector rod, so that the first ejector rod pushes the inclined ejector rod to move along the inclined groove and disengage from the undercut on the workpiece. This continuous action not only improves the ejection efficiency, but also reduces the risk of damage to the workpiece and improves product quality.

[0016] In addition, a fixing mechanism is provided at the parting surface of the mold core, which is assembled on the mold core to enhance the overall stability and durability of the mold. This structural design allows the mold to maintain precise component positioning during high-pressure injection molding, reduces mold wear and deformation, and extends the service life of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure shows a schematic diagram of a narrow space inclined roof structure when the undercut is located at the edge provided by an embodiment of the present invention; Figure 2 Schematic diagram of the narrow space inclined top structure when the undercut is located at the edge and schematic diagram of the narrow space inclined top injection mold structure provided by an embodiment of the present invention; Figure 3 The figure shows a schematic diagram of a narrow space inclined top structure when the undercut is located at the edge provided by an embodiment of the present invention. A side view of a narrow space inclined top injection mold structure Figure 4 The figure shows a schematic diagram of a narrow space inclined roof structure when the undercut is located in the middle position provided by an embodiment of the present invention; Figure 5 Schematic diagram of the narrow space inclined top structure when the undercut is located in the middle position provided by an embodiment of the present invention; Schematic diagram of the narrow space inclined top injection mold structure; Figure 6 The figure shows a schematic diagram of a narrow space inclined top structure when the undercut is located at a middle position provided by an embodiment of the present invention and a side view of a narrow space inclined top injection mold structure; In the figure: 1. inclined ejector; 2. first ejector rod; 3. pressure block; 4. fastener; 5. workpiece; 6. fixing block; 7. second ejector rod; 8. spring; 9. pin; 10. ejection stroke; 11. mold core; 12. template; 13. ejector plate; 14. base; 15. third ejector rod; 16. ejection limit column. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations on the technical solution of the present invention. The embodiments of the present invention and the technical features in the embodiments may be combined with each other unless there is a conflict.

[0019] The term "and / or" is only a description of the association relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " generally indicates that the related objects are in an "or" relationship. Example 1

[0020] See also Figures 1 to 6 This embodiment introduces a narrow space inclined ejector injection mold device. The structure is particularly suitable for injection molding in a narrow space and can effectively solve the problems of the inclined ejector structure in the traditional mold being too long and weak in strength due to product interference or insufficient space in the molding backward direction. The structure includes an inclined ejector 1, a workpiece 5, a first ejector 2 and a third ejector 15. One end of the inclined ejector 1 contacts the end surface of the first ejector 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 2 is provided with a cup head, and the first ejector 2 is fixed to the ejector plate 13 through the cup head, and the ejector plate 13 is installed on the base 14.

[0021] Furthermore, one end of the third ejector pin 15 passes through the base 14 and is fixedly connected to the ejector plate 13, and the other end is connected to the ejector 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.

[0022] It should be noted that the structure of the fixing mechanism is different depending on the position of the undercut on the workpiece 5 .

[0023] After the injection molding is completed, during the process of the mold opening and ejecting the product, the ejection mechanism of the injection molding machine drives the third ejector 15 to push the ejector plate 13 to move, and then pushes the first ejector 2, so that the first ejector 2 pushes the inclined ejector 1 to move along the inclined ejector groove in the mold core 11, thereby making the inclined ejector 1 detach from the undercut on the workpiece 5 to complete the ejection process of the workpiece 5.

[0024] In summary, the device can significantly shorten the length of the inclined ejector and reduce processing costs, while improving the strength of the inclined ejector and reducing deformation. A shorter inclined ejector length can also effectively reduce the mold ejection stroke and achieve correct disassembly and assembly, thereby reducing downtime for maintenance and repair and improving production efficiency. In addition, the structure saves space, is simple and quick to install, and can achieve standardization and interchangeability, further enhancing its practicality and economy in the field of injection mold demolding technology. Example 2

[0025] When the undercut is located at the edge of the workpiece 5, the inclined top injection mold device is as follows Figures 1 to 3 As shown, the fixing mechanism consists of only a pressing block 3, which is fixed to the mold core 11 by a fastener 4, such as a screw, so that the inclined ejector 1 can be stably assembled in the inclined ejector groove in the mold core 11 and maintain a precise position during the injection molding process.

[0026] Furthermore, the inclined ejector 1 is provided with a step hanging platform, and an ejection space 10 is formed between the step hanging platform and the pressing block 3. The ejection space 10 is the area where the inclined ejector 1 moves during the ejection process. The size and shape of the ejector space 10 are determined according to the specific size of the product undercut and the angle of the inclined ejector 1 to ensure that the inclined ejector 1 can fully break away from the product undercut within the ejection stroke 10.

[0027] In summary, the design of the inclined ejector 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 inclined ejector 1 in the ejection state, that is, at least 1 / 3 of the length of the inclined ejector 1 is retained in the corresponding groove of the mold core 11.

[0028] In addition, the formation of the ejection space 10 also helps to reduce the interference between the inclined ejector 1 and other parts of the mold during the ejection process, thereby reducing the risk of wear and damage and extending the service life of the mold. The device also allows the mold core 11 and related components to be quickly disassembled and assembled from the front, greatly simplifying the maintenance and servicing process, reducing downtime caused by maintenance, and improving production efficiency. Example 3

[0029] See also Figures 4 to 6 When the undercut is located in the middle position of the workpiece 5, the fixing mechanism includes not only the pressing block 3 but also the fixing block 6. The fixing block 6 is connected to the second push rod 7 through the pin 9, and the pressing block 3 fixes the fixing block 6 to the bottom of the mold core 11 through the fastener 4.

[0030] 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, and the female end of the first T-slot is connected to the male end of the second T-slot. The connection method of the T-slot provides a firm and precise connection mechanism to ensure the synchronous movement of the inclined ejector 1 and the second ejector rod 7 during the ejection process.

[0031] During the assembly process, after the inclined ejector 1 and the second ejector rod 7 are connected through the T-slot, the inclined ejector 1 is inserted into the inclined slot in the mold core 11 from the front side. After the inclined ejector 1 and the second ejector rod 7 pass through the mold core 11, the spring 8 and the fixing block 6 are installed at the bottom of the mold core 11, and the second ejector rod 7 is connected to the fixing block 6 through the pin 9. The assembly sequence not only simplifies the installation process, but also ensures the precise positioning and fixing of all components.

[0032] In another embodiment of the present invention, one end of the first ejector rod 2 provided with a cup head is fixed on the ejector plate 13, and the other end contacts the bottom of the fixed block 6. After the injection molding is completed, when the mold is opened to eject 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, and the first ejector rod 2 pushes the fixed block 6, and the fixed 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 inclined ejector groove of the mold core 11, so that the inclined ejector 1 is separated from the undercut on the workpiece 5, and the ejection of the workpiece 5 is completed.

[0033] When the inclined ejector 1 returns to its original position, the spring 8 is in a released state, and the spring 8 pushes the fixed block 6 and then drives the second ejector rod 7 to return and move. The second ejector rod 7 then drives the inclined ejector 1 to move in the inclined ejector groove in the mold core 11, so that the inclined ejector 1 returns to the initial state of the mold core 11.

[0034] The narrow space inclined top injection mold device of the present invention further includes a template 12 to meet the injection molding requirements of different snap-in positions. The mold core 11 is fixed in the template frame in the template 12, allowing the mold to perform precise injection molding in a limited space while maintaining the stability of the mold and the convenience of operation.

[0035] In Example 1 and Example 2, the ejector plate 13 is provided with an ejection limit column 16, which controls the ejection distance during the ejection process of the mold. The ejection distance of the ejection limit column 16 is set to be less than or equal to the preset value of the ejection stroke 10, ensuring that the inclined ejector 1 can completely break away from the undercut on the product 5 during the ejection process, while ensuring the precise control of the ejection stroke 10, avoiding product damage or mold damage that may be caused by excessive ejection.

[0036] By precisely controlling the ejection stroke, the device can ensure consistent product quality and long-term durability of the mold. In addition, the device helps reduce equipment failures and repair costs caused by improper ejection stroke control, facilitates the maintenance and upkeep of injection molds, and enables efficient and precise injection molding in narrow spaces, while reducing production costs and improving production efficiency and product quality.

[0037] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the protection of the present invention.

Claims

1. A narrow space inclined top injection mold device, characterized in that: The invention comprises an inclined ejector (1), a workpiece (5), a first ejector rod (2) and a third ejector rod (15); one end of the inclined ejector rod (1) contacts the end surface 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 to an ejector plate (13) through the cup head; the ejector plate (13) is mounted on a 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 an ejection mechanism of an injection molding machine; the inclined ejector rod (1) is assembled in a mold core (11); 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 the injection molding is completed, when the mold is opened to eject the product, the ejection mechanism of the injection molding machine drives the third ejector pin (15) to push the ejector plate (13) to move, thereby pushing the first ejector pin (2), so that the first ejector pin (2) pushes the inclined ejector (1) to move along the inclined ejector groove in the mold core (11) and disengage from the undercut on the workpiece (5), thereby completing the ejection of the workpiece (5).

2. A narrow space tilt top 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 comprises a pressing block (3), and the pressing block (3) is fixed to the mold core (11) via a fastener (4).

3. The narrow space tilt top injection mold device according to claim 2, characterized in that: The inclined ejector (1) is provided with a step hanging platform, and an ejection space (10) is formed between the step hanging platform and the pressing block (3).

4. The narrow space tilt top injection mold device according to claim 1, characterized in that: When the undercut is located at a middle position of the workpiece (5), the fixing mechanism comprises a pressing block (3) and a fixing block (6), the fixing block (6) being fixedly connected to a second push rod (7), and the pressing block (3) fixing the fixing block (6) to the bottom of the mold core (11) via a fastener (4).

5. The narrow space tilt top injection mold device according to claim 4, characterized in that: The inclined ejector (1) is provided with a first T-slot, the second ejector rod (7) 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.

6. The narrow space tilt top injection mold device according to claim 5, characterized in that: The inclined ejector (1) and the second ejector rod (7) are connected via a T-slot and then inserted into the inclined slot in the inclined ejector (1) from the front side 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) via a pin (9).

7. The narrow space tilt top injection mold device according to claim 6, characterized in that: One end of the first ejector rod (2) provided 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).

8. The narrow space tilt top injection mold device according to claim 7, characterized in that: When the third ejector rod (15) drives the ejector plate (13) to eject, the spring (8) is in a compressed state, and the first ejector rod (2) pushes the fixed block (6), so that the fixed 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 inclined ejector groove in the mold core (11), so that the inclined ejector rod (1) is separated from the undercut in the workpiece (5); When the inclined ejector returns to its original position, the spring (8) is in a released state, so that the spring (8) pushes the fixed block (6), thereby driving the second ejector rod (7) to return and move, and the second ejector rod (7) then drives the inclined ejector (1) to move in the inclined ejector groove in the mold core (11), so that the inclined ejector (1) returns to the initial state of the mold core (11).

9. The narrow space tilt top injection mold device according to claim 1, characterized in that: It also comprises a template (12), wherein the mold core (11) is fixed in a template frame in the template (12).

10. The narrow space tilt top injection mold device according to claim 1, characterized in that: An ejection limit column (16) is provided on the ejector plate (13), and an ejection distance of the ejection limit column (16) is less than or equal to a preset value of the ejection stroke (10).

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