Plastic mold secondary ejection device capable of finishing straight ejection block in advance

Abstract

The utility model discloses a plastic mould secondary ejection device capable of finishing a straight ejection block in advance. The plastic mould secondary ejection device comprises a first ejector plate and a second ejector plate which are stacked from bottom to top, a mold seat is arranged above the second ejector plate, a first cavity for forming a product is formed in the top of the mold seat, a first ejector rod is further mounted on the first ejector plate, and one end of the first ejector rod movably penetrates through the second ejector plate and then is movably inserted into the first cavity of the mold seat; the end, movably inserted into the first cavity, of the first ejector rod is further connected with an ejector block, and a limiting sleeve is further arranged on the outer wall of the lower portion of the first ejector rod. In order to avoid the problem that a product is difficult to take out due to the fact that the ejector block clamps a bone position, a secondary ejection structure with the ejector block ending ejection action in advance is designed, it is guaranteed that the product can be taken out smoothly, the overall design is reasonable, the structure is compact, use is convenient, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a secondary ejection device for a plastic mold with a straight ejector block terminating in advance. Background Art

[0002] In plastic molds, products often have local deep cavity features, and dense grid bone positions are often used to enhance product strength. The position of such products often has a very large clamping force after injection molding, making it difficult to eject. Conventional ejection will require a large number of ejectors to meet the force-bearing area to eject the product. However, because places with many bone positions usually accumulate heat, mold cooling must be relatively better to ensure the production cycle. Due to space limitations, it is difficult to meet both ejection and cooling requirements at the same time. Utility Model Content

[0003] The utility model aims to provide a secondary ejection device for a plastic mold with a straight ejector block terminating prematurely. An ejector block is added to the device to increase the ejection area, thereby reducing the number of ejector pins, so as to better arrange the water transport cooling structure. At the same time, in order to avoid the problem of difficulty in removing products due to the ejector block being stuck in the bone position, a secondary ejection structure is designed in which the ejector block terminates the ejection action prematurely, so as to ensure that the products can be smoothly removed. The overall design is reasonable, the structure is compact, the use is convenient, and the practicability is strong.

[0004] In order to achieve the above purpose, the following technical solutions are adopted:

[0005] A secondary ejection device for a plastic mold with a straight ejector block terminating prematurely, comprising a first ejector plate and a second ejector plate which are stacked from bottom to top; a mold base is arranged above the second ejector plate, and a first cavity for molding a product is opened on the top of the mold base, a first ejector rod is also installed on the first ejector plate, and one end of the first ejector rod is movably inserted into the first cavity of the mold base after movably passing through the second ejector plate; an ejector block is also connected to one end of the first ejector rod movably inserted into the first cavity, and a limiting sleeve is also provided on the lower outer wall of the first ejector rod; the second ejector plate is movably sleeved on the limiting sleeve, and one end of the limiting sleeve passes through the second ejector plate and extends in the direction of the mold base; a second ejector rod is also installed on the second ejector plate, and one end of the second ejector rod is movably inserted into the first cavity of the mold base.

[0006] Furthermore, a first fixing block is installed in the first ejector plate at a position corresponding to the first ejector rod; and a compression spring is connected between the top of the first fixing block and the bottom of the limiting sleeve.

[0007] Furthermore, a first groove is formed at the top of the first ejector plate, and a second groove is formed at the bottom of the second ejector plate corresponding to the first groove; a limiting cavity is formed between the first groove and the second groove; a limiting step is also formed at the bottom of the limiting sleeve, and the limiting step is arranged in the limiting cavity.

[0008] Furthermore, it also includes a bottom plate; the top two ends of the bottom plate are each connected to a limit vertical plate; a limit protrusion is also provided on the opposite side of the two limit vertical plates; the first ejector plate and the second ejector plate are both movably arranged on the bottom plate and located between the two limit vertical plates; both sides of the first ejector plate and the second ejector plate are provided with limit slots, and the limit protrusions are arranged in the limit slots.

[0009] Furthermore, a guide rod is installed on the bottom plate, and one end of the guide rod moves through the first ejector plate and the second ejector plate in sequence.

[0010] Furthermore, a guide groove is provided at a position corresponding to the guide rod and the outer wall of the mold base; one end of the guide rod movably passes through the second ejector plate and is inserted into the guide groove.

[0011] By adopting the above scheme, the beneficial effects of the utility model are:

[0012] An ejector block is added to the device to increase the ejection area, thereby reducing the number of ejector pins to facilitate better arrangement of the water cooling structure. At the same time, in order to avoid the problem of difficulty in removing the product due to the ejector block getting stuck in the bone position, a secondary ejection structure is designed to allow the ejector block to end the ejection action in advance, ensuring that the product can be smoothly removed. The overall design is reasonable, the structure is compact, the use is convenient, and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 for Figure 1 A structural diagram omitting some structures;

[0015] Figure 3 It is a cross-sectional view of the utility model;

[0016] The accompanying drawings illustrate:

[0017] 1. First ejector plate; 2. Second ejector plate; 3. Mold seat; 4. Bottom plate; 5. Limiting vertical plate; 11. First ejector rod; 12. Ejector block; 13. Limiting sleeve; 14. First fixed block; 15. Compression spring; 16. Limiting cavity; 17. Limiting step; 21. Second ejector rod; 41. Guide rod; 51. Limiting protrusion. DETAILED DESCRIPTION

[0018] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Reference Figures 1 to 3As shown, the utility model provides a secondary ejection device for a plastic mold with a straight ejector block ending in advance, comprising a first ejector plate 1 and a second ejector plate 2 which are stacked from bottom to top; a mold base 3 is arranged above the second ejector plate 2, and a first cavity for molding a product is opened on the top of the mold base 3. In one embodiment, a first ejector rod 11 is also installed on the first ejector plate 1, and one end of the first ejector rod 11 is movably inserted into the first cavity of the mold base 3 after movably passing through the second ejector plate 2; an ejector block 12 is also connected to one end of the first ejector rod 11 which is movably inserted into the first cavity, and a limiting sleeve 13 is also provided on the lower outer wall of the first ejector rod 11; the second ejector plate 2 is movably sleeved on the limiting sleeve 13, and one end of the limiting sleeve 13 passes through the second ejector plate 2 and extends in the direction of the mold base 3; a second ejector rod 21 is also installed on the second ejector plate 2, and one end of the second ejector rod 21 is movably inserted into the first cavity of the mold base 3.

[0020] Continue to refer to Figures 1 to 3 As shown, in this embodiment, one end of the first ejector pin 11 movably inserted in the first cavity is also connected to the ejector block 12, and the ejector block 12 is inserted in the corresponding bone position at the bottom of the product. The number of the first ejector pins 11 is provided in four groups, which are distributed at the four corners of the bottom of the product, so that the product can be evenly stressed; the number of the second ejector pins 21 (round ejector pins) can be set according to actual use requirements, and there is no restriction on this; when working, first, the first ejector plate 1 and the second ejector plate 2 move upward at the same time, and then the ejector block 12 and the second ejector pin 21 push the product to move, after moving a certain stroke, the upper part of the limit sleeve 13 will reach the bottom of the mold seat 3, so that the ejector block 12 ends the movement in advance, and then the second ejector plate 2 continues to move upward, and the second ejector pin 21 continues to push the product, so that the bone position at the bottom of the product is separated from the ejector block 12, and then the product is taken out to complete the demoulding. In the design, it is necessary to ensure that the secondary movement stroke of the second ejector plate 2, that is, the second ejection stroke is greater than the depth of the bone position, so as to ensure that the product bone position and the ejector block 12 can be separated smoothly.

[0021] In one embodiment, a first fixing block 14 is further installed in the first ejector plate 1 at a position corresponding to the first ejector rod 11; a compression spring 15 is further connected between the top of the first fixing block 14 and the bottom of the limiting sleeve 13; a first groove is provided at the top of the first ejector plate 1, and a second groove is further provided at the bottom of the second ejector plate 2 at a position corresponding to the first groove; a limiting cavity 16 is formed between the first groove and the second groove; a limiting step 17 is further provided at the bottom of the limiting sleeve 13, and the limiting step 17 is arranged in the limiting cavity 16. In this embodiment, the ejector block ends the structure in advance, and the product is pushed out synchronously with the dome ejector by the force of the bottom compression spring 15 until the limiting sleeve 13 presses against the bottom of the mold seat 3 to stop the movement.

[0022] In one embodiment, it further includes a bottom plate 4; the top two ends of the bottom plate 4 are each connected to a limiting vertical plate 5; the two limiting vertical plates 5 are each provided with a limiting protrusion 51 on the opposite side; the first ejector plate 1 and the second ejector plate 2 are both movably arranged on the bottom plate 4 and located between the two limiting vertical plates 5; both sides of the first ejector plate 1 and the second ejector plate 2 are provided with limiting slots, and the limiting protrusion 51 is arranged in the limiting slots. At the same time, a guide rod 41 is also installed on the bottom plate 4, and one end of the guide rod 41 is movably arranged through the first ejector plate 1 and the second ejector plate 2 in sequence. By providing the limiting protrusion 51, the limiting slot and the guide rod 41, the first ejector plate 1 and the second ejector plate 2 can be guided when they move.

[0023] In addition, a guide groove is provided at the outer wall of the mold base 3 corresponding to the guide rod 41; one end of the guide rod 41 movably passes through the second ejector plate 2 and is inserted into the guide groove. The upper part of the guide rod 41 is inserted into the guide groove to improve the stability of its installation.

[0024] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A secondary ejection device for a plastic mold with a straight ejector block ending prematurely, comprising a first ejector plate and a second ejector plate stacked from bottom to top; a mold base is arranged above the second ejector plate, and a first cavity for molding a product is opened on the top of the mold base, characterized in that: It also includes a first ejector rod, one end of which is movably inserted into the first cavity of the mold base after passing through the second ejector plate; the end of the first ejector rod movably inserted into the first cavity is also connected to an ejector block, and a limit sleeve is also provided on the lower outer wall of the first ejector rod; the second ejector plate is movably sleeved on the limit sleeve, and one end of the limit sleeve passes through the second ejector plate and extends in the direction of the mold base; the second ejector rod is also installed on the second ejector plate, and one end of the second ejector rod is movably inserted into the first cavity of the mold base; A first fixing block is also installed in the first ejector plate at a position corresponding to the first ejector rod; a compression spring is also connected between the top of the first fixing block and the bottom of the limiting sleeve; A first groove is formed at the top of the first ejector plate, and a second groove is formed at the bottom of the second ejector plate corresponding to the first groove; a limiting cavity is formed between the first groove and the second groove; a limiting step is also formed at the bottom of the limiting sleeve, and the limiting step is arranged in the limiting cavity.

2. The secondary ejection device for plastic mold with premature termination of straight ejection block according to claim 1, characterized in that: It also includes a bottom plate; the top two ends of the bottom plate are each connected to a limit vertical plate; the opposite sides of the two limit vertical plates are each provided with a limit protrusion; the first ejector plate and the second ejector plate are both movably arranged on the bottom plate and located between the two limit vertical plates; both sides of the first ejector plate and the second ejector plate are provided with limit slots, and the limit protrusions are arranged in the limit slots.

3. The secondary ejection device for plastic mold with premature termination of straight ejection block according to claim 2, characterized in that: A guide rod is also installed on the bottom plate, and one end of the guide rod moves through the first ejector plate and the second ejector plate in sequence.

4. The secondary ejection device for plastic mold with premature termination of straight ejection block according to claim 3, characterized in that: A guide groove is also provided at the outer wall of the mold base corresponding to the guide rod; one end of the guide rod movably passes through the second ejector plate and is inserted into the guide groove.

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