CN215512126U

CN215512126U - Secondary ejection die sinking composite linkage mechanism

Info

Publication number: CN215512126U
Application number: CN202121726135.8U
Authority: CN
Inventors: 武鹏; 袁霜; 张超
Original assignee: Zhejiang Zero Run Technology Co Ltd
Current assignee: Zhejiang Zero Run Technology Co Ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-01-14
Anticipated expiration: 2031-07-27

Abstract

The utility model discloses a secondary ejection die sinking composite linkage mechanism which comprises a front die plate, a rear die plate backing plate and a needle plate which are sequentially arranged, wherein a cam groove for placing a cam is formed in the outer side of the rear die plate, which is close to one side of the rear die plate backing plate, the opening of the cam groove faces towards the rear die plate backing plate, a connecting plate is used for connecting the cam with a connecting rod, the connecting plate is rotatably connected onto the connecting rod, the cam is connected with the connecting plate through a cam rotating shaft, one end, close to the outer side wall of the rear die plate, of the cam is abutted against the upper surface of the rear die plate backing plate, one end, connected with the cam rotating shaft, of the cam is always spaced from the rear die plate backing plate and is always positioned on one side, far away from the outer side wall of the rear die plate, of the connecting rod is fixedly connected onto the front die plate or the needle plate, and the connecting rod extends along the direction of the rear die plate. The utility model has the beneficial effects that: the ejection force or die sinking force which is multiplied is obtained when the die is opened and ejected by using the cam lever principle, so that the die is matched with the most reasonable machine table, and the production unit price of injection molding parts is reduced.

Description

Secondary ejection die sinking composite linkage mechanism

Technical Field

The utility model relates to the technical field of injection molds, in particular to a secondary ejection mold opening composite linkage mechanism.

Background

The utility model aims at the development and application of the mould of the product with larger holding power of plastic thick-wall parts or deep cavity masks, and the problems in the prior art comprise that: 1. the existing injection molding machine table for the transparent plastic thick-wall part usually adopts a high-speed motor, but because the product is the thick-wall part, the product is filled by the high-speed high-pressure motor under full pressure to prevent the product from shrinking, and meanwhile, the product forms larger holding force in a cavity, so that the product cannot be ejected; 2. in order to solve the problem of holding force in the traditional mold development of plastic thick-wall type, a parting surface lateral core-pulling slide block is adopted to remove the holding force, so that the mold manufacturing cost is directly increased; 3. because the mold opening force and ejection force of the injection molding machine are rated, when the rated ejection force and mold opening force are overloaded, the product is difficult to eject or mold, and is forced to be replaced by a larger machine to obtain a product ejected with larger ejection and mold opening force, so that the injection molding cost unit price of the product is increased invisibly; 4. conventional dark chamber class face guard can all form the vacuum after moulding plastics, forms great holding power and leads to the unable die sinking of product or lead to the product top to split or can't be ejecting, also will change bigger board, has just also provided the unit price of moulding plastics of single product.

The prior art is to the great problem of power of holding tightly of plastics thick-walled spare class or deep cavity face guard class, and the solution that provides mainly is: 1. A lateral large-surface core-pulling sliding block is added to a thick-wall part product to decompose the holding force; 2. the deep cavity mask is ejected twice by a large machine table, and the vacuum adsorption force is removed by deforming the product through the ejection of the ejector pin for the first time. For example, chinese patent publication No. CN205871092U, entitled automobile injection mold with multi-stage core-pulling structure, adopts a method of increasing a lateral large-surface core-pulling slider, and decomposing the holding force, so that the problem of directly increasing the manufacturing cost of the mold still exists.

Disclosure of Invention

The utility model provides a secondary ejection die-sinking composite linkage mechanism for solving the technical problems, which can obtain the ejection force or die sinking force which is multiplied by times and reduce the production unit price of injection molding parts.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a secondary ejection die-sinking composite linkage mechanism is suitable for an injection die, the injection die comprises a front die plate, a rear die plate backing plate and a needle plate which are sequentially arranged, the linkage mechanism comprises a connecting rod, a connecting plate and a cam, the outer side of one side of the rear die plate backing plate, which is close to the rear die plate backing plate, is provided with a cam groove for placing the cam, the opening of the cam groove faces the rear die plate backing plate, the connecting plate is used for connecting the cam and the connecting rod, the connecting plate is rotatably connected onto the connecting rod, the cam is connected with the connecting plate through a cam rotating shaft, one end of the cam, which is close to the outer side wall of the rear die plate, is abutted against the upper surface of the rear die plate backing plate, one end of the cam connecting cam rotating shaft and the rear die plate backing plate always have an interval, and is always positioned on one side of the cam groove, which is far away from the outer side wall of the rear die plate, the connecting rod is fixedly connected onto the front die plate or the needle plate, the connecting rod extends along the direction of the rear template.

Preferably, the distance from the connecting part of the connecting plate and the connecting rod to the rear template base plate is always greater than the distance from the cam rotating shaft to the rear template base plate.

Preferably, the contour line radius of one end of the cam, which is far away from the outer side wall of the rear template, is larger than the contour line radius of one end, which is close to the outer side wall of the rear template.

Preferably, the connecting rod is perpendicular to the contact surface of the rear template base plate and the rear template.

Preferably, the connecting rod is provided with an installation groove at the end part close to one end of the rear template, a connecting plate rotating shaft rotatably connected with the connecting rod is fixedly arranged on the connecting plate, and the connecting plate rotating shaft is installed in the installation groove.

Preferably, the width of the groove wall of the mounting groove on the side far away from the rear template base plate is larger than the width of the groove wall on the side close to the rear template base plate.

Preferably, one end of the cam, which is far away from the outer side wall of the rear template, is always abutted against the groove bottom of the cam groove, and a transition fillet is arranged between the groove bottom of the cam groove and the groove wall.

Preferably, a reinforcing layer is arranged at the position where the rear template base plate abuts against the cam.

The utility model has the beneficial effects that: the ejection force or die sinking force which is multiplied is obtained when the die is opened and ejected by using the cam lever principle, so that the die is matched with the most reasonable machine table, and the production unit price of injection molding parts is reduced.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present application.

Fig. 2 is a schematic structural diagram of embodiment 2 of the present application.

In the figure: the structure comprises a front template 1, a rear template 2, a cam groove 21, a rear template backing plate 3, a reinforcing layer 31, a needle plate 4, a first connecting rod 5, a second connecting rod 5a, a mounting groove 51, a first connecting plate 6, a second connecting plate 6a, a rotating shaft 61, a first cam 7, a second cam 7a, a first cam rotating shaft 8 and a second cam rotating shaft 8 a.

Detailed Description

The utility model is described in further detail below with reference to specific embodiments and the attached drawing figures. Those skilled in the art will be able to implement the utility model based on these teachings. Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Unless otherwise specified, the raw materials used in the examples of the present invention are all commercially available or available to those skilled in the art; unless otherwise specified, the methods used in the examples of the present invention are all those known to those skilled in the art.

Example 1:

the embodiment provides a compound link gear of secondary ejection die sinking, as shown in fig. 1, is suitable for injection mold, the injection mold comprises a front template 1, a back template 2, a back template backing plate 3 and a needle plate 4 which are arranged in sequence, the link gear comprises a connecting rod 5, a connecting plate 6 and a cam 7, a cam groove 21 for placing the cam is arranged on the outer side of one side of the back template backing plate close to the back template backing plate, the opening of the cam groove faces the back template backing plate, the connecting plate is used for connecting the cam and the connecting rod, the connecting plate is rotatably connected on the connecting rod, the cam is connected with the connecting plate through a cam rotating shaft 8, one end of the cam close to the outer side wall of the back template is abutted against the upper surface of the back template backing plate, one end of the cam connecting cam rotating shaft is always spaced from the back template backing plate and is always positioned on one side of the cam groove far away from the outer side of the back template, the connecting rod is fixedly connected to the front template and extends along the direction of the rear template.

Furthermore, the distance from the joint of the connecting plate and the connecting rod to the rear template base plate is always greater than the distance from the cam rotating shaft to the rear template base plate.

Furthermore, the contour line radius of one end of the cam, which is far away from the outer side wall of the rear template, is larger than the contour line radius of one end, which is close to the outer side wall of the rear template.

Furthermore, the connecting rod is perpendicular to the contact surface of the rear template base plate and the rear template.

Further, the connecting rod is close to the tip of back template one end is equipped with mounting groove 51, the fixed connecting plate pivot 61 of being connected with the connecting rod rotation that is provided with on the connecting plate, the connecting plate pivot install in the mounting groove.

Furthermore, the width of the groove wall of the mounting groove on the side far away from the rear template base plate is larger than the width of the groove wall on the side close to the rear template base plate.

Further, the cam is kept away from the one end of back template lateral wall with the tank bottom of cam groove supports all the time and leans on, be equipped with transition fillet between the tank bottom of cam groove and the cell wall.

Further, a reinforcing layer 31 is arranged at the position where the rear template base plate abuts against the cam.

The mold opening process of the injection mold adopting the secondary ejection mold opening composite linkage mechanism provided by the scheme of the embodiment is described in the following with reference to fig. 1: the injection molding machine closes the mold to start injection molding of a product, the injection molding machine opens the mold after the injection molding of the product is finished and cools, the mold opening of the injection molding machine starts, the mold opening of the injection molding machine moves backwards, the front template moves upwards, the front template drives the first connecting rod to move upwards, one end of the first connecting plate, which is connected with the first connecting rod, moves upwards under the drive of the first connecting rod, so that a first cam rotating shaft on the first connecting plate moves upwards and outwards, the first cam starts to bear force, the force is exerted on the abutting position of the first cam and the rear template backing plate, the rear template backing plate is fixed at the moment, the first cam rotates around the first cam rotating shaft, simultaneously, the contour surface of one end, which is far away from the rear template, of the first cam abuts against the rear template pad to rotate, so that the rear template overcomes the internal clamping force to move and demold, and in the process, the first cam forms a lever structure, the force action point of the first cam rotating shaft and the abutting position of the first cam and the rear template, the fulcrum is at the abutment of the first cam with the rear template pad, thus multiplying the force acquired by the rear template.

Example 2:

the present example is otherwise identical to example 1, except that: as shown in fig. 2, the connecting rod is fixedly connected with the needle plate. The ejection process of the injection mold adopting the secondary ejection and mold opening composite linkage mechanism provided by the scheme of the embodiment is described by combining the following steps of: the injection molding machine closes the mold to start injection molding of a product, the injection molding machine opens the mold after the injection molding of the product is finished and cools to start ejection, an ejector rod of the injection molding machine acts on a needle plate 4, the needle plate moves upwards to act on a second connecting rod 5a, the second connecting rod drives a second connecting plate 6a, the second connecting plate drives a second cam rotating shaft 8a to move upwards and outwards, a second cam 7a starts to bear force to be acted on the abutting position of the second cam and a rear template backing plate, and as the rear template backing plate is fixed at the moment, the second cam rotates around the second cam rotating shaft 8a, and simultaneously, a contour surface of one end of the second cam, which is far away from the rear template, abuts against the rear template backing plate to rotate, so that the rear template overcomes the internal holding force to move and demold, in the process, the second cam forms a lever structure and acts on the second cam rotating shaft and the abutting position of the second cam rotating shaft and the rear template backing plate, the fulcrum is where the second cam abuts the back template bolster, thus multiplying the force available to the back template.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, and other embodiments formed by any combination of the above-mentioned features or their equivalents may be covered without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. A secondary ejection die-sinking composite linkage mechanism is suitable for an injection die, the injection die comprises a front die plate, a rear die plate backing plate and a needle plate which are sequentially arranged, and the secondary ejection die-sinking composite linkage mechanism is characterized in that the linkage mechanism comprises a connecting rod, a connecting plate and a cam, the outer side of one side of the rear die plate, which is close to the rear die plate backing plate, is provided with a cam groove for placing the cam, the opening of the cam groove faces the rear die plate backing plate, the connecting plate is used for connecting the cam and the connecting rod, the connecting plate is rotatably connected onto the connecting rod, the cam is connected with the connecting plate through a cam rotating shaft, one end of the cam, which is close to the outer side wall of the rear die plate, is abutted against the upper surface of the rear die plate backing plate, one end of the cam connecting cam rotating shaft and the rear die plate backing plate always have an interval, and the cam connecting the cam rotating shaft and the rear die plate backing plate always has an interval, which is located on one side, which is far away from the outer side wall of the rear die plate, the connecting rod is fixedly connected to the front template or the needle plate and extends along the direction of the rear template.

2. The compound link gear of two-shot ejection die sinking of claim 1, characterized by that, the distance from the junction of the said connecting plate and the said connecting rod to the back template bolster is greater than the distance from the said cam spindle to the said back template bolster all the time.

3. The compound link gear of two-shot ejection die sinking of claim 1, characterized in that, the contour line radius of the cam is greater away from the end of the back die plate lateral wall than the contour line radius of the end close to the back die plate lateral wall.

4. The compound link gear of two-shot ejection die sinking of claim 1 or 2 or 3, characterized in that, the connecting rod sets up perpendicularly to the contact surface of back template backing plate and back template.

5. The compound link gear of two-shot ejection die sinking of claim 1, characterized in that the connecting rod has a mounting groove at its end near one end of the back die plate, and the connecting plate is fixedly provided with a connecting plate rotating shaft rotatably connected with the connecting rod, and the connecting plate rotating shaft is mounted in the mounting groove.

6. The compound link gear of two-shot ejection and mold opening as claimed in claim 5, wherein the groove wall width of the mounting groove on the side away from the back template backing plate is greater than the groove wall width on the side close to the back template backing plate.

7. The compound linkage mechanism of two-time ejection and mold opening as claimed in claim 1, 2 or 3, wherein one end of the cam far away from the outer side wall of the rear mold plate always abuts against the groove bottom of the cam groove, and a transition fillet is arranged between the groove bottom and the groove wall of the cam groove.

8. The compound link gear of two-shot ejection die sinking of claim 1 or 2 or 3, characterized in that, the back template backing plate is provided with the reinforcing layer with the cam department of supporting.