Accelerated ejection demolding structure of radome top cover

Abstract

The utility model relates to an accelerated ejection demolding structure for a top cover of an antenna housing, which comprises a mold frame, and at least comprises an upper mold plate and a lower mold plate which can be closed to form a mold cavity; an upper mold core and a lower mold core are arranged in the mold cavity, and when the upper mold plate and the lower mold plate are closed, the upper mold core and the lower mold core are closed to form a cavity; an injection molding runner is arranged in the mold frame and is communicated with the mold cavity; the insert is located on the lower mold core, and when the upper mold core and the lower mold core are closed, an injection molding cavity of the antenna housing top cover product is formed between the insert and the upper mold core; a plurality of groups of ejector pins are arranged on the ejector pin plate and are used for ejecting the insert and the product; the ejection mechanism further comprises an accelerated ejection mechanism which is arranged on the ejector plate and is driven by the ejector plate to eject a product. And in the mold opening process, the ejector plate is lifted by a first stroke and a second stroke.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an accelerated ejection and demolding structure for an antenna cover top cover. Background Art

[0002] At present, the mold structure of electrical products is usually a single ejection. For some complex products, a single ejection cannot solve the problem of product demolding, resulting in the product sticking to the mold and being difficult to take out. It needs to be taken out manually, and the product will be damaged, and it cannot be automatically produced by a manipulator, affecting the molding cycle.

[0003] The outer shape of the antenna cover top cover is small and has a relatively thin flanging. During ejection and demolding, it is easy to produce white marks or protrusions, resulting in defects on the surface of the product and a high defective rate. Summary of the Utility Model

[0004] In order to solve the above problems existing in the prior art, the utility model provides an accelerated ejection and demolding structure for an antenna cover top cover.

[0005] The above problems of the utility model are solved by the following technical solutions:

[0006] An accelerated ejection and demolding structure for an antenna cover top cover, comprising:

[0007] A mold base, at least including an upper template and a lower template that can be closed to form a mold cavity; an upper mold core and a lower mold core are arranged in the mold cavity. When the upper template and the lower template are closed, the upper mold core and the lower mold core are closed to form a cavity; an injection runner is arranged in the mold base and communicated with the cavity;

[0008] An insert, located on the lower mold core. When the upper mold core and the lower mold core are closed, an injection cavity for the antenna cover top cover product is formed between the insert and the upper mold core;

[0009] A thimble plate, on which a plurality of groups of thimbles are arranged for ejecting the insert and the product;

[0010] It further includes an accelerated ejection mechanism, which is arranged on the thimble plate and is driven by the thimble plate to eject the product;

[0011] During the mold opening process, the thimble plate has a lift in the first stroke and the second stroke:

[0012] In the first stroke, it is driven by an external driving component, and the thimble plate drives the thimbles to lift upward to eject the insert and the product at the same time;

[0013] In the second stroke, the thimble plate is lifted again and drives the accelerated ejection mechanism to quickly eject the product from the insert.

[0014] The further setting of the above technical solution is: The acceleration ejection mechanism includes a driving block, and the driving block is hinged to the ejector plate through a short shaft;

[0015] On both sides of the short shaft on the driving block are a driving side and a pushing side respectively, and a push rod capable of driving the pushing side downward is arranged on the pushing side.

[0016] The push rod can move towards the lower template and abut against the lower template;

[0017] In the first stroke, the push rod rises upward along with the ejector plate;

[0018] In the second stroke, the push rod abuts against the lower template, making the driving side of the driving block unable to continue rising.

[0019] The further setting of the above technical solution is: The acceleration ejection mechanism further includes a lifting block, the lifting block is embedded in the ejector plate, and is connected to the driving side of the driving block.

[0020] The further setting of the above technical solution is: A clamping groove is arranged on the driving side of the driving block, and a clamping shoulder capable of being clamped into the clamping groove is arranged on the lifting block.

[0021] The further setting of the above technical solution is: The ejector pin includes a first ejector pin group and a second ejector pin group, the first ejector pin group is arranged on the ejector plate to eject the insert;

[0022] The second ejector pin group is arranged on the lifting block to eject the product.

[0023] The further setting of the above technical solution is: A limiting groove is arranged on the lifting block, and the limiting groove is arranged below the clamping shoulder.

[0024] The further setting of the above technical solution is: The upper end surface of the pushing side of the driving block is set as a notch, and a first abutting surface and a second abutting surface which are bent and connected are arranged on the end surface of the notch.

[0025] Compared with the prior art, the beneficial effect of the present utility model is that: In the first stroke, the insert and the product are slowly separated from the lower mold core, causing the first separation of the product from the components on the mold. The product only contacts the insert, reducing the adhesion generated between the product and the mold during the second ejection; In the second stroke, the lifting speed of the ejector plate remains unchanged, while the ejection of the product is accelerated. At the same time, the insert is no longer lifted, further accelerating the separation speed of the product relative to the insert. The product separates from the insert at a very fast speed, reducing the top white or protrusion generated by slow separation, avoiding surface defects during product ejection, and reducing the defective rate. Description of the Drawings

[0026] Figure 1 This is a schematic cross-sectional structure diagram of the present utility model.

[0027] Figure 2 This is a schematic cross-sectional structure diagram of the present utility model from another angle.

[0028] Figure 3 This is an exploded structure schematic diagram of the acceleration ejection mechanism.

[0029] Figure 4 is Figure 2 an enlarged structure schematic diagram of part A in

[0030] Figure 5 a structure schematic diagram of the acceleration ejection mechanism when it rotates to the limit position.

[0031] Figure 6 is Figure 3 an enlarged structure schematic diagram of part B in

[0032] Marked on the attached drawings:

[0033] 110. Upper template; 120. Lower template;

[0034] 210. Upper die core; 220. Lower die core;

[0035] 300. Insert block;

[0036] 400. Ejector plate;

[0037] 510. Driving block; 511. Pushing side; 512. Driving side; 513. Engaging groove; 520. Short shaft; 530. Ejector rod; 540. Lifting block; 541. Engaging shoulder; 510.1. First abutting surface; 510.2. Second abutting surface; 542. Limiting groove;

[0038] 610. First ejector pin group; 620. Second ejector pin group;

[0039] 1. Product. Specific embodiments

[0040] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in combination with the attached drawings and preferred embodiments, details the specific embodiments, structures, features and their effects of the present utility model as follows.

[0041] As Figures 1-6 shown, this embodiment discloses an acceleration ejection and demolding structure for an antenna radome top cover, including

[0042] The mold base includes at least an upper template 110 and a lower template 120 that can be closed to form a mold cavity. An upper mold core 210 and a lower mold core 220 are arranged in the mold cavity. When the upper template 110 and the lower template 120 are closed, the upper mold core 210 and the lower mold core 220 are closed to form a cavity. An injection runner is arranged in the mold base and communicated with the cavity.

[0043] The insert 300 is located on the lower mold core 220. When the upper mold core 210 and the lower mold core 220 are closed, an injection cavity for the radome top cover product 1 is formed between the insert 300 and the upper mold core 210.

[0044] The ejector plate 400 is provided with multiple groups of ejector pins for ejecting the insert 300 and the product 1.

[0045] It further includes an accelerating ejection mechanism. The accelerating ejection mechanism is arranged on the ejector plate 400 and is driven by the ejector plate 400 to eject the product 1.

[0046] During the mold opening process, the ejector plate 400 has a lift in the first stroke and the second stroke:

[0047] In the first stroke, it is driven by an external driving component. The ejector plate 400 drives the ejector pins to lift upward, ejecting the insert 300 and the product 1 simultaneously.

[0048] In the second stroke, the ejector plate 400 is lifted again and drives the accelerating ejection mechanism to quickly eject the product 1 from the insert 300.

[0049] The above is the basic solution of this embodiment.

[0050] Specifically referring to Figure 1 and Figure 2 As shown, when the mold is closed, the upper template 110 and the lower template 120 are closed, the upper mold core 210 and the lower mold core 220 are joined, an injection cavity is formed between the insert 300 and the upper mold core 210, and the injection plastic enters the injection cavity through the injection runner to form the radome top cover product 1.

[0051] When the mold is opened, the external driving component drives the upper template 110 and the lower template 120 to separate, separating the upper mold core 210 and the lower mold core 220.

[0052] The mold closing and opening processes are the same as those of the mold in the prior art and will not be elaborated here.

[0053] When ejecting the product 1, the external driving component lifts the ejector plate 400. The ejector plate 400 drives the ejector pins to lift upward, and the ejector pins eject the insert 300 and the product 1 on the insert 300.

[0054] In the first stroke, the insert 300 and the product 1 on the insert 300 are ejected in the same direction and at the same speed, and the product 1 remains molded on the insert 300;

[0055] At the end of the first stroke and in the second stroke, the ejector plate 400 continues to lift upward. At this time, due to the action of the acceleration ejection mechanism, the ejector plate 400 continues to lift, the insert 300 is lifted at the same speed as the ejector plate 400, and some of the ejector pins that hold the product 1 are lifted at a speed greater than that of the ejector plate 400, so that the product 1 is quickly ejected from the product 1.

[0056] In the first stroke, the insert 300 and the product 1 are slowly separated from the lower mold core 220, causing the first separation of the product 1 from the components on the mold. The product 1 is only in contact with the insert 300, reducing the adhesion generated between the product 1 and the mold during the second ejection;

[0057] In the second stroke, the lifting speed of the ejector plate 400 remains unchanged, while the ejection of the product 1 is accelerated. At the same time, the insert 300 is no longer lifted, further accelerating the separation speed of the product 1 relative to the insert 300. The product 1 separates from the insert 300 at a very fast speed, reducing the top white or bulge that would be generated by slow separation, avoiding surface defects during the ejection of the product 1, and reducing the defective rate.

[0058] Specifically, the acceleration ejection mechanism includes a driving block 510, and the driving block 510 is hinged to the ejector plate 400 through a short shaft 520;

[0059] On both sides of the short shaft 520 on the driving block 510 are a driving side 512 and a pushing side 511 respectively. A ejector rod 530 that can drive the pushing side 511 downward is provided on the pushing side 511.

[0060] Refer to Figure 3 As shown, the driving side 512 and the pushing side 511 are respectively arranged on both sides of the short shaft 520, forming a seesaw through the short shaft 520. When the pushing side 511 moves downward under the action of the ejector rod 530, the driving block 510 rotates clockwise around the short shaft 520, so that the driving side 512 moves upward.

[0061] Specifically, in this embodiment, the driving mode of the ejector rod 530 on the pushing side 511 is set as: the ejector rod 530 can move toward the lower template 120 and hold against the lower template 120;

[0062] In the first stroke, the ejector rod 530 rises upward with the ejector plate 400;

[0063] In the second stroke, the ejector rod 530 holds against the lower template 120, preventing the driving side 512 of the driving block 510 from continuing to rise.

[0064] On the upper end face of the driving block 510 near the pushing side 511, there is a supporting face, and the lower end of the ejector rod 530 abuts against the supporting face;

[0065] In the mold closing state, there is a stroke space between the upper end of the ejector rod 530 and the upper template 110. In the first stroke, when the ejector plate 400 is lifted, it drives the driving block 510 to lift together. Then, the ejector rod 530 abutting against the driving block 510 also moves upward and gradually approaches the lower template 120;

[0066] After the first stroke ends, the upper end of the ejector rod 530 abuts against the lower end face of the lower template 120;

[0067] In this way, in the second stroke, when the ejector plate 400 continues to lift, since the ejector rod 530 cannot continue to move upward, the pushing side 511 of the driving block 510 cannot continue to move upward either; while the pushing side 511 of the driving block 510 can still move upward, thus realizing the movement of the seesaw.

[0068] In this embodiment, the way to realize the accelerating jacking effect of the driving block 510 on the product 1 is as follows: The accelerating ejection mechanism further includes a lifting block 540, the lifting block 540 is embedded in the ejector plate 400 and is connected to the driving side 512 of the driving block 510.

[0069] Specifically, a clamping groove 513 is provided on the driving side 512 of the driving block 510, and a clamping shoulder 541 that can be inserted into the clamping groove 513 is provided on the lifting block 540.

[0070] Specifically refer to Figure 3 and Figure 4 As shown, the lifting block 540 is embedded in the ejector plate 400 and moves upward together with the ejector plate 400. At the same time, the injection cavity is located above the lifting block 540, and some ejector pins for ejecting the product 1 are arranged on the lifting block 540. The product 1 is ejected during the upward lifting process of the lifting block 540;

[0071] A clamping shoulder 541 is provided on one side of the lifting block 540 facing the driving block 510, and the clamping groove 513 of the driving block 510 cooperates with the clamping shoulder 541 to drive the lifting block 540;

[0072] In the second stroke, the lifting block 540 moves upward under the action of the ejector plate 400. At the same time, due to the action of the ejector rod 530, the pushing side 511 of the driving block 510 cannot continue to move upward, and the lifting plate driven by the ejector plate 400 also moves upward relative to the pushing side 511. That is, the pushing side 511 moves downward relative to the lifting plate at the same speed; due to the seesaw effect of the driving block 510, the driving side 512 also moves upward at this speed. Due to the connection between the engaging shoulder 541 and the engaging groove 513, the driving side 512 lifts the lifting block 540 at the same speed, so that the lifting block 540 moves upward at a speed greater than that of the ejector plate 400, realizing the accelerated ejection of the product 1.

[0073] In this embodiment, the ejector pin includes a first ejector pin group 610 and a second ejector pin group 620. The first ejector pin group 610 is arranged on the ejector plate 400 to eject the insert block 300.

[0074] The second ejector pin group 620 is arranged on the lifting block 540 to eject the product 1.

[0075] The first ejector pin group 610 is arranged between the ejector plate 400 and the insert block 300. When the ejector plate 400 moves upward, the first ejector pin group 610 ejects the insert block 300.

[0076] The second ejector pin group 620 is arranged between the lifting block 540 and the injection cavity to eject the product 1.

[0077] In this embodiment, in order to limit the rotation angle of the driving block 510, a limiting groove 542 is provided on the lifting block 540, and the limiting groove 542 is arranged below the engaging shoulder 541.

[0078] Refer to Figure 3 and Figure 5 As shown, the limiting groove 542 is a notch provided below the engaging shoulder 541. In the second stroke, the driving block 510 rotates clockwise under the action of the ejector rod 530, so that the lower end of the driving side 512 of the driving block 510 is embedded in the limiting groove 542. When interference occurs due to the abutment between the end of the driving side 512 and the limiting groove 542, the driving side 512 cannot continue to rotate, so the driving block 510 rotates to the limit position.

[0079] Preferably, in this embodiment, to ensure the stable abutment between the ejector rod 530 and the driving block 510, the upper end surface of the pushing side 511 of the driving block 510 is provided with a notch, and a first abutting surface 510.1 and a second abutting surface 510.2 which are bent and connected are arranged on the end surface of the notch.

[0080] Refer to Figure 6As shown, the first abutting surface 510.1 is a horizontal plane. In the mold-closed state and the first stroke, the lower end surface of the ejector pin 530 contacts the first abutting surface 510.1; when the driving block 510 rotates, the first abutting surface 510.1 gradually becomes inclined as the driving block 510 rotates, while the originally inclined second abutting surface 510.2 gradually rotates to the horizontal position and contacts and abuts against the lower end surface of the ejector pin 530.

[0081] Due to the rotation of the driving block 510, the single horizontal plane will gradually incline during rotation, resulting in unstable abutment with the ejector pin 530. In this embodiment, two mutually connected abutting surfaces are provided, so that the ejector pin 530 abuts against the horizontal plane in both strokes, ensuring the stability of the abutment.

[0082] In this embodiment, both the first ejector pin group 610 and the second ejector pin group 620 include a plurality of ejector pins.

[0083] At the same time, two acceleration ejection mechanisms are symmetrically arranged on each lifting block 540.

[0084] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed as above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An accelerated ejection demoulding structure for a radome top cover, comprising: The mold frame at least comprises an upper mold plate (110) and a lower mold plate (120) capable of being molded together to form a mold cavity; an upper mold core (210) and a lower mold core (220) are arranged in the mold cavity; when the upper mold plate (110) and the lower mold plate (120) are molded together, the upper mold core (210) and the lower mold core (220) are molded together to form a mold cavity; an injection flow channel is arranged in the mold frame and is connected to the mold cavity; The insert (300) is located on the lower mold core (220); when the upper mold core (210) and the lower mold core (220) are molded together, an injection molding cavity of the antenna cover top cover product (1) is formed between the insert (300) and the upper mold core (210); An ejector plate (400) on which a plurality of ejector pins are arranged for ejecting the insert (300) and the product (1); Features: It also includes an accelerating ejection mechanism, which is arranged on the ejector plate (400) and is driven by the ejector plate (400) to eject the product (1); During the mold opening process, the ejector plate (400) has a first stroke and a second stroke lift: In the first stroke, the ejector plate (400) is driven by an external driving component to lift the ejector upward, thereby ejecting the insert (300) and the product (1) simultaneously; In the second stroke, the ejector plate (400) is lifted again and the accelerated ejection mechanism is driven to quickly eject the product (1) from the insert (300).

2. The accelerated ejection demoulding structure of the antenna cover according to claim 1 is characterized in that: The accelerating ejection mechanism comprises a driving block (510), and the driving block (510) is hinged on the ejector plate (400) via a short shaft (520); The two sides of the driving block (510) located on the short shaft (520) are respectively a driving side (512) and a pushing side (511), and the pushing side (511) is provided with a push rod (530) capable of driving the pushing side (511) downward.

3. The accelerated ejection demoulding structure of the antenna cover according to claim 2 is characterized in that: The push rod (530) is capable of moving toward the lower template (120) and being supported by the lower template (120); During the first stroke, the ejector rod (530) is lifted upward along with the ejector plate (400); During the second stroke, the push rod (530) is supported by the lower template (120), so that the driving side (512) of the driving block (510) cannot be further lifted.

4. The accelerated ejection demoulding structure of the antenna cover according to claim 2 or 3, characterized in that: The accelerated ejection mechanism further comprises a lifting block (540), wherein the lifting block (540) is embedded in the ejector plate (400) and connected to the driving side (512) of the driving block (510).

5. The accelerated ejection demoulding structure of the antenna cover according to claim 4, characterized in that: The driving side (512) of the driving block (510) is provided with an engagement groove (513), and the lifting block (540) is provided with an engagement shoulder (541) that can be inserted into the engagement groove (513).

6. The accelerated ejection demoulding structure of the antenna cover according to claim 4, characterized in that: The ejector pins include a first ejector pin group (610) and a second ejector pin group (620); the first ejector pin group (610) is arranged on the ejector pin plate (400) to eject the insert (300); The second ejector pin group (620) is arranged on the lifting block (540) to eject the product (1).

7. The accelerated ejection demoulding structure of the antenna cover according to claim 5, characterized in that: The lifting block (540) is provided with a limiting groove (542), and the limiting groove (542) is arranged below the engaging shoulder (541).

8. The accelerated ejection demoulding structure of the antenna cover according to claim 4, characterized in that: The upper end surface of the pushing side (511) of the driving block (510) is arranged as a notch, and the end surface of the notch is provided with a first abutting surface (510.1) and a second abutting surface (510.2) which are connected in a bent manner.

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