Secondary ejection mechanism

Abstract

The utility model discloses a secondary ejection mechanism, and belongs to the technical field of injection molds. The mold mainly comprises a base, a first top plate, a second top plate and an ejection structure, a pair of mold feet is mounted at the top of the base, an upper mold is mounted at the tops of the mold feet, the first top plate is mounted on the inner sides of the pair of mold feet, a push block is mounted at the top of the first top plate, the second top plate abuts against the top of the first top plate, and an ejector pin is mounted at the top of the second top plate; the ejection structure comprises a movable warping plate arm and a height adjusting block, the movable warping plate arm is rotationally installed on one side of the first ejection plate, the height adjusting block is installed on the mold foot, a guide column is installed on the top of the base, through holes matched with the guide column are formed in the first ejection plate and the second ejection plate, and the guide column penetrates through the through holes. According to the secondary ejection mechanism, the function of secondary ejection is achieved through the warping plate principle, the whole mechanism is relatively simple in structure, a complex transmission mechanism and an electric control system are not needed, and therefore the working efficiency is high, and the maintenance cost is low.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of injection molds, in particular to a secondary ejection mechanism. BACKGROUND

[0002] When a product is taken out of a mold, whether a single or multi-component ejection mechanism is used, the ejection action is completed at one time, but for products of special shapes, if the product cannot completely separate from the mold after one-time ejection or the product cannot separate from the ejection mechanism, for some injection molded products, a reverse buckle is designed on the inner wall according to the needs, because the product with this structure is difficult to demold, and thus a secondary ejection structure is needed to complete the demolding of the product.

[0003] At present, the traditional secondary ejection mechanism generally adopts a design of four ejection plates, which relies on the difference in spring force to achieve the effect of secondary ejection, however, this method not only has high cost, but also has a relatively complex structure, which affects the working efficiency, in addition, another common traditional secondary ejection method is to rely on an external cylinder to provide power, but this method is quite cumbersome in the implementation process, because it needs to be linked with an external electric control system and an injection molding machine, which undoubtedly increases the cost, and also brings a lot of trouble in the process of installation and disassembly.

[0004] Therefore, it is necessary to provide a secondary ejection mechanism to solve the above problems.

[0005] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background technology of the concept of the present application, and therefore, it can contain information which does not constitute prior art. CONTENT OF THE UTILITY MODEL

[0006] Based on the above problems existing in the prior art, the problem to be solved by the present application is to provide a secondary ejection mechanism, which drives the first ejection plate to move vertically upward, synchronously drives the push block at the top of the first ejection plate and the second ejection plate at the top to move, realizes the first ejection operation, along with the rising process of the first ejection plate, the movable flap arm abuts against the height adjusting block, the movable flap arm is relatively rotated under the block of the height adjusting block, so that the second ejection plate moves upward relative to the first ejection plate, the second ejection plate synchronously drives the ejector pin to rise, realizes the second ejection operation, completes the demolding of the product, by using the flap principle, the function of secondary ejection is realized, the whole mechanism has a relatively simple structure, does not need a complex transmission mechanism and an electric control system, and thus has high working efficiency and low maintenance cost.

[0007] The technical scheme adopted by the application to solve the technical problems is: a secondary ejection mechanism, comprising: a base, a first top plate, a second top plate and an ejection structure, a pair of die feet are installed on the top of the base, an upper die is installed on the top of the die feet, the first top plate is installed on the inner side of the pair of die feet, and a push block is installed on the top of the first top plate, the second top plate abuts against the top of the first top plate, and a ejector pin is installed on the top of the second top plate, the ejection structure comprises a movable flap arm and a height adjusting block, the movable flap arm is rotatably installed on one side of the first top plate, and the height adjusting block is installed on the die feet.

[0008] Further, a guide column is installed on the top of the base, a through hole matched with the guide column is formed on the first top plate and the second top plate, and the guide column penetrates the through hole.

[0009] Further, a reserved slot is formed on the second top plate, and the push block penetrates the reserved slot.

[0010] Further, the ejection structure further comprises a rotating shaft, and the movable flap arm is rotatably connected with the first top plate through the rotating shaft.

[0011] Further, a ejection wear-resistant block is installed on the bottom of the second top plate.

[0012] Further, a top rod is installed on the bottom of the first top plate, and the top rod penetrates the base.

[0013] The beneficial effects of the application are: the secondary ejection mechanism provided by the application drives the first top plate to move vertically upward, synchronously drives the push block on the top of the first top plate and the second top plate on the top to move, realizes the first ejection operation, and during the rising process of the first top plate, the movable flap arm abuts against the height adjusting block, the movable flap arm is relatively rotated under the block of the height adjusting block, so that the second top plate moves upward relative to the first top plate, the second top plate synchronously drives the ejector pin to rise, realizes the second ejection operation, and completes product demolding, the function of secondary ejection is realized by using the flap principle, the whole mechanism structure is relatively simple, and a complex transmission mechanism and an electric control system are not needed, so the working efficiency is high and the maintenance cost is low.

[0014] In addition to the purposes, features and advantages described above, the application has other purposes, features and advantages. The application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification of the application form a part of the application and serve to provide further understanding of the application, the illustrative embodiments of the application and their descriptions serve to explain the application, and do not constitute improper limitations on the application.

[0016] In the drawings:

[0017] Figure 1 is a first overall structure schematic view;

[0018] Figure 2 is a Figure 1 enlarged structure schematic view at A in the middle;

[0019] Figure 3 is a second overall structure schematic view;

[0020] Figure 4 is a partial structure schematic view.

[0021] In the drawings, various reference numerals represent various features that will be discussed below.

[0022] 1, base; 2, die foot; 3, upper die; 4, first top plate; 5, second top plate; 6, movable rocker arm; 7, rotating shaft; 8, height adjusting block; 9, ejector pin; 10, guide column; 11, ejection wear-resistant block; 12, ejector rod; 13, push block. DETAILED DESCRIPTION

[0023] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0024] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0025] As Figures 1-4 shown, the present application provides a secondary ejection mechanism, which comprises a base 1, a first top plate 4, a second top plate 5 and an ejection structure. The base 1 has a pair of die feet 2 installed on the top, and the die feet 2 have an upper die 3 installed on the top. The first top plate 4 is installed on the inner side of the pair of die feet 2, and the first top plate 4 has a push block 13 installed on the top. The second top plate 5 abuts against the top of the first top plate 4, and the second top plate 5 has an ejector pin 9 installed on the top. The ejection structure comprises a movable rocker arm 6 and a height adjusting block 8. The movable rocker arm 6 is rotatably installed on one side of the first top plate 4, and the height adjusting block 8 is installed on the die feet 2.

[0026] In the present embodiment, the present application is mainly used in plastic forming and other processes. When the first ejection action cannot completely demold the product, the reliable demolding is realized by increasing the first ejection action.

[0027] Specifically, by driving the first top plate 4 to move vertically upward, the push block 13 at the top of the first top plate 4 and the second top plate 5 at the top are synchronously driven to move, realizing the first ejection operation. During the rising of the first top plate 4, the movable flap arm 6 is abutted against the height adjusting block 8, and the movable flap arm 6 is relatively rotated under the block of the height adjusting block 8, so that the second top plate 5 moves upward relative to the first top plate 4, the second top plate 5 synchronously drives the ejector pin 9 to rise, realizing the second ejection operation, completing product demolding. By using the flap principle, the function of twice ejection is realized, the whole mechanism structure is relatively simple, and complex transmission mechanism and electric control system are not needed, so that the working efficiency is high and the maintenance cost is low.

[0028] As shown in Figure 4 , the bottom of the base 1 is provided with a guide column 10, and the first top plate 4 and the second top plate 5 are both provided with through holes matched with the guide column 10, and the guide column 10 penetrates the through holes.

[0029] In the embodiment, the movement track of the second top plate 5 and the first top plate 4 is limited by the guide column 10, so that the two can move along the set track, and the stability of the vertical movement of the first top plate 4 and the second top plate 5 is improved.

[0030] As shown in Figure 4 , the second top plate 5 is provided with a reserved slot, and the push block 13 penetrates the reserved slot.

[0031] As shown in Figure 2 , the ejection structure further comprises a rotating shaft 7, and the movable flap arm 6 is rotatably connected to the first top plate 4 through the rotating shaft 7.

[0032] In the embodiment, the rotating shaft 7 is used to install the movable flap arm 6 to the first top plate 4, and when the first top plate 4 rises, the movable flap arm 6 is blocked by the height adjusting block 8, so that the movable flap arm 6 can rotate around the rotating shaft 7 as the rotation point, thereby completing the second ejection operation.

[0033] As shown in Figure 2 , the bottom of the second top plate 5 is provided with an ejection wear-resistant block 11.

[0034] In the embodiment, the ejection wear-resistant block 11 is installed on the contact surface of the movable flap arm 6, and when the movable flap arm 6 is pressed against the bottom of the second top plate 5, the ejection wear-resistant block 11 can play a wear-resistant role, and the service life of the movable flap arm 6 is improved.

[0035] As shown in Figure 3 , the bottom of the first top plate 4 is provided with a top rod 12, and the top rod 12 penetrates the base 1.

[0036] In the embodiment, the first and second top plates 4 and 5 are driven to move vertically by connecting the top rod 12 with an external power source, thereby completing the product demolding operation.

[0037] The external power source can drive the cylinder.

[0038] Working principle:

[0039] The first top plate 4 is driven to move vertically upward, thereby driving the push block 13 at the top of the first top plate 4 and the second top plate 5 at the top to move, realizing the first ejection operation. During the upward movement of the first top plate 4, the movable flap arm 6 is in abutment with the height adjusting block 8, and the movable flap arm 6 is blocked by the height adjusting block 8 and rotates relatively, thereby driving the second top plate 5 to move upward relative to the first top plate 4. The second top plate 5 drives the ejector pin 9 to move upward, realizing the second ejection operation, and completing the product demolding.

[0040] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A secondary ejection mechanism characterized by: Include: Base (1), the base (1) top mounting a pair of die feet (2), the die feet (2) top mounting upper die (3); First top plate (4), the first top plate (4) is installed to a pair of die feet (2) inner side, and the first top plate (4) top mounting push block (13); Second top plate (5), the second top plate (5) with first top plate (4) top abutment, and the second top plate (5) top mounting ejector pin (9); Ejection structure, the ejection structure includes movable flap arm (6) and height adjustment block (8), the movable flap arm (6) rotationally installed to one side of first top plate (4), the height adjustment block (8) is installed to die feet (2).

2. The secondary ejection mechanism of claim 1, wherein: The base (1) top mounting guide column (10), the first top plate (4) and second top plate (5) all are set with the through hole of being compatible with guide column (10), the guide column (10) penetrates the through hole.

3. The secondary ejection mechanism of claim 1, wherein: The second top plate (5) is set with the reserved slot, and the push block (13) penetrates the reserved slot.

4. The secondary ejection mechanism of claim 1, wherein: The ejection structure further includes rotating shaft (7), and the movable flap arm (6) is rotationally connected with first top plate (4) through rotating shaft (7).

5. The secondary ejection mechanism of claim 1, wherein: The second top plate (5) bottom mounting ejection wear block (11).

6. The secondary ejection mechanism of claim 1, wherein: The first top plate (4) bottom mounting top rod (12), the top rod (12) penetrates the base (1).

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