CN109910242B - Injection mold ejection mechanism and injection mold - Google Patents
Injection mold ejection mechanism and injection mold Download PDFInfo
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- CN109910242B CN109910242B CN201910205248.4A CN201910205248A CN109910242B CN 109910242 B CN109910242 B CN 109910242B CN 201910205248 A CN201910205248 A CN 201910205248A CN 109910242 B CN109910242 B CN 109910242B
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Abstract
The invention relates to an injection mold ejection mechanism and an injection mold, comprising a reinforced ejection mechanism, wherein the reinforced ejection mechanism comprises a guide pillar, a linkage mechanism and a hydraulic mechanism; the linkage mechanism comprises an ejector rod and a base, the base is fixedly arranged on the fixed die frame, and the ejector rod and the base are rotatably arranged; the upper end of the guide post is fixed on the elastic block ejection mechanism, and the lower end of the guide post is abutted against the head end of the ejection rod; the hydraulic mechanism comprises a hydraulic oil cylinder and a pressing rod, a piston rod of the hydraulic oil cylinder is connected with the pressing rod, the hydraulic oil cylinder is fixed on the fixed die frame, and the end part of the pressing rod is in press contact with the tail end of the ejector rod. According to the invention, the reinforced ejection mechanism is added, so that ejection and rebounding actions of the spring block can be effectively reinforced, and the phenomenon of blocking of the spring block is avoided. The problem of the bullet piece card pause phenomenon that the exclusive use bullet piece ejection mechanism leads to is solved.
Description
Technical Field
The invention relates to an injection mold, in particular to an injection mold ejection mechanism and an injection mold.
Background
An injection mold is a tool for producing plastic products and also a tool for giving the plastic products complete structure and precise dimensions. The processing method is used for mass production of parts with complex shapes during injection molding, and specifically comprises the steps of injecting heated and melted plastics into a mold cavity from an injection molding machine at high pressure, and cooling and solidifying to obtain a molded product. The molded product needs to be demolded, after cooling molding, the product is stuck in a female die, and a demolding mechanism needs to be designed for demolding, which is troublesome, so that an ejection mechanism is generally designed for an injection mold at present to eject the molded product.
In the design of the ejection mechanism, the use of the elastic block is also rising, the other name of the elastic block is called a core-pulling sliding block, the name is given by adding a spring as a limiting condition, and the core-pulling mechanism is widely applied to complex multi-curved-surface injection molding parts.
In the plastic fittings of automobiles, the injection mold is adopted for mass production, which results in that the designed mold has enough stability and durability, the ejection of the spring block is carried out by the spring, the repeated extrusion and stretching of the spring in the air are more easily damaged, and the most serious phenomenon can result in production stop if the ejection blocking phenomenon occurs.
Disclosure of Invention
The invention aims to provide an injection mold ejection mechanism and an injection mold. The ejection mechanism is used for solving the problem of the blocking phenomenon of the elastic block caused by the independent use of the ejection mechanism.
In order to achieve the purpose, the scheme of the invention is as follows: an injection mold ejection mechanism comprises an elastic block ejection mechanism and a reinforced ejection mechanism, wherein the reinforced ejection mechanism comprises a guide pillar, a linkage mechanism and a hydraulic mechanism;
the linkage mechanism comprises an ejector rod and a base, the base is fixedly arranged on the fixed die frame, and the ejector rod and the base are rotatably arranged;
the upper end of the guide post is fixed on the elastic block ejection mechanism, and the lower end of the guide post is abutted against the head end of the ejection rod;
the hydraulic mechanism comprises a hydraulic oil cylinder and a pressing rod, a piston rod of the hydraulic oil cylinder is connected with the pressing rod, the hydraulic oil cylinder is fixed on the fixed die frame, and the end part of the pressing rod is in press contact with the tail end of the ejector rod.
Further, according to the injection mold ejection mechanism provided by the invention, the base comprises a bottom plate and two mounting lugs, the bottom plate is mounted on the fixed mold frame, the two mounting lugs are mounted on the bottom plate in parallel, the ejection rod is mounted between the two mounting lugs through a pin, and the ejection rod can rotate around the pin.
Further, according to the injection mold ejection mechanism provided by the invention, the hydraulic mechanism corresponds to the two linkage mechanisms, two ends of the pressing rod are respectively in press contact with the tail end of the corresponding ejection rod, and the head end of each ejection rod is in press contact with the corresponding guide pillar.
Further, according to the injection mold ejection mechanism provided by the invention, the piston rod of the hydraulic oil cylinder is fixedly connected with the middle part of the pressing rod through a screw.
Further, according to the injection mold ejection mechanism provided by the invention, the ejection rod and the pressing rod are both of a cuboid structure, and two ends of the pressing rod are pressed above the tail end of the corresponding ejection rod.
Further, according to the injection mold ejection mechanism of the present invention, the ejection rod rotates clockwise.
Further, according to the injection mold ejection mechanism provided by the invention, the bottom plate of the base is of a square structure, four screw holes are formed in the bottom plate, and the bottom plate is fixed on the fixed mold frame through screws.
Further, according to the injection mold ejection mechanism provided by the invention, the elastic block ejection mechanism comprises an elastic block, a shoulder bolt and a spring, the spring is arranged below the elastic block, and the shoulder bolt penetrates through the elastic block and the spring and is fixed on the fixed mold frame.
Further, according to the injection mold ejection mechanism provided by the invention, the guide post is fixed on the elastic block through a screw.
The invention also provides an injection mold which comprises the ejection mechanism.
The invention achieves the following beneficial effects: the invention can effectively strengthen the ejection and rebound actions of the elastic block by adding the linkage mechanism and the hydraulic mechanism under the supercharging action, has less added parts and does not influence the work of other systems.
Secondly, the hydraulic oil cylinder is adopted for strengthening ejection, so that the instability of independently using the elastic block is avoided.
The auxiliary power is supplied to the two elastic blocks by adding the hydraulic oil cylinder, so that the working space is saved, the possible blocking phenomenon of the spring can be solved, and the spring can be ejected and rebounded stably.
Drawings
FIG. 1 is a schematic structural diagram of a spring block ejection mechanism;
FIG. 2 is a cross-sectional view of the ejection mechanism of the present invention;
fig. 3 is a top view of the reinforced ejection mechanism of the present invention.
In the figure, 1-a fixed mould frame; 2-a bullet block; 3-shoulder bolts; 4-a spring; 5-a screw; 6-guide pillar; 7-pins; 8-a base; 9-a screw; 10-ejection rod; 11-a screw; 12-a plunger rod; 13-a screw; 14-a hydraulic oil cylinder; 15-a piston rod; 16-mounting ears; 17-base plate
h-spring block stroke; h 1-hydraulic cylinder piston stroke; a-the direction of motion of the projectile; b-the stress direction of the tail end of the ejector rod; c-Ejection rod rotation direction.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
As shown in fig. 1, the elastic block ejection mechanism comprises an elastic block 2, a shoulder bolt 3 and a spring 4, wherein the spring 4 is arranged below the elastic block 2, and the shoulder bolt 3 penetrates through the elastic block 2 and the spring 4 and is fixed on the fixed mold frame. During injection molding, the spring 4 is in a pressed state, after the mold is opened, the spring 4 ejects the elastic block 2, and the stroke of the elastic block 2 is h. When the mold is closed again, the elastic block 2 rebounds, and the spring 4 is in a pressed state again.
In order to enable the spring in the elastic block to be used more durably and stably, the invention adds a power for strengthening ejection and rebound to the elastic block, namely, the ejection force of the elastic block is strengthened by adding a strengthening ejection mechanism, so that the use flatness of the spring is relieved, and the elastic block is prevented from being stuck.
As shown in fig. 2, the reinforced ejection mechanism of the present invention includes a guide post 6, a linkage mechanism and a hydraulic mechanism, wherein the guide post 6 is fixed on the elastic block 2, and the linkage mechanism is used for providing a force along direction a to the guide post 6 to reinforce the ejection force of the elastic block 2. The hydraulic mechanism is arranged to provide a downward force to the interlocking mechanism, causing the interlocking mechanism to push the guide post 6, thereby subjecting the guide post to a force in direction a. Specifically, the method comprises the following steps:
the linkage mechanism comprises an ejector rod 10 and a base 8, wherein the base 8 is fixedly installed on the fixed mold frame 1, the ejector rod 10 and the base 8 are rotatably installed, and in fig. 2, c is the rotating direction of the ejector rod 10.
In this embodiment, the base 8 includes a bottom plate 17 and two mounting lugs 16, wherein the bottom plate is of a square structure, and four screw holes are provided on the bottom plate, and are fixed on the fixed mold frame 1 through four screws 9, the two mounting lugs are installed on the bottom plate in parallel, the ejector rod 10 is installed between the two mounting lugs through a pin 7, and the ejector rod 10 can rotate around the pin along a direction c, as shown in fig. 3.
The upper end of the guide post 6 is fixed on the elastic block 2 through a screw 5, the lower end of the guide post 6 is abutted against the head end of the ejector rod 10, and when the ejector rod 10 rotates along the direction c, force along the direction a is given to the guide post 6 through the head end of the ejector rod 10. In this embodiment, the guide post 6 is a cylindrical structure, and the lower end of the guide post 6 is a semicircular structure.
The hydraulic mechanism comprises a hydraulic oil cylinder 14 and a pressing rod 12, a piston rod 15 of the hydraulic oil cylinder 14 is connected with the pressing rod 12, the hydraulic oil cylinder 14 is fixed on the fixed die frame through a screw 13, and the end part of the pressing rod 12 is in press contact with the tail end of the ejector rod.
As a further optimization, the invention can adopt a hydraulic oil cylinder to simultaneously carry out reinforced ejection on two elastic block ejection mechanisms so as to save the working space (as shown in fig. 3). The method specifically comprises the following steps: two ends of the pressing rod 12 are respectively corresponding to a linkage mechanism, and a piston rod 15 of the hydraulic oil cylinder 14 is connected and fixed with the middle part of the pressing rod 12 through a screw 11. The two ends of the push rod 12 are respectively pressed against the tail end of the corresponding ejector rod 10, and the head end of each ejector rod 10 is pressed against the corresponding guide post 6. In this embodiment, the ejector rod 10 and the pressure rod 12 are both rectangular structures, and the two ends of the pressure rod 12 are pressed above the tail end of the corresponding ejector rod 10.
When the injection mold of the invention is used for injection molding, the spring 4 is in a compressed state, the injection mold is in a state shown in fig. 2, and the ejector rod 10 is in a balanced state. When the mold is opened, the piston rod 15 of the hydraulic oil cylinder 14 moves along the direction b under the hydraulic pressure of the hydraulic oil cylinder 14, the piston rod 15 and the pressing rod 12 of the hydraulic oil cylinder 14 are fixed together through the screw 11, so the pressing rod 12 also moves along the direction b, the tail end of the ejector rod 10 is pressed downwards, the ejector rod 10 rotates around the pin 7 along the direction c, the guide post 6 is pressed along the direction a, and the guide post 6 is fixed on the elastic block 2 through the screw 5, so the elastic block 2 is ejected by the pre-pressure of the spring 4 and is also ejected by the force along the direction a of the guide post 6 when the mold is opened.
By increasing the forced ejecting force of the guide post 6, the phenomenon of blocking of the elastic block 2 can be effectively prevented, and the elastic block 2 can be ejected stably and quickly. When the mold is closed again, the elastic block 2 and the guide post 6 rebound together due to the mold closing force, the spring 4 is in a compressed state again, the injection mold is in a state shown in fig. 2 again, and the ejector rod 10 is also in a balanced state again.
According to the invention, the auxiliary power is supplied to the two elastic blocks by adding the hydraulic oil cylinder, so that the working space is saved, the possible blocking phenomenon of the spring can be solved, and the spring can be ejected and rebounded stably.
Claims (8)
1. The utility model provides an injection mold ejection mechanism, injection mold ejection mechanism includes bullet piece ejection mechanism, its characterized in that: the injection mold ejection mechanism further comprises a reinforced ejection mechanism, and the reinforced ejection mechanism comprises a guide pillar, a linkage mechanism and a hydraulic mechanism;
the linkage mechanism comprises an ejector rod and a base, the base is fixedly arranged on the fixed die frame, and the ejector rod and the base are rotatably arranged;
the upper end of the guide post is fixed on the elastic block ejection mechanism, and the lower end of the guide post is abutted against the head end of the ejection rod;
the hydraulic mechanism comprises a hydraulic oil cylinder and a pressing rod, a piston rod of the hydraulic oil cylinder is connected with the pressing rod, the hydraulic oil cylinder is fixed on the fixed die frame, and the end part of the pressing rod is in press contact with the tail end of the ejector rod;
the base comprises a bottom plate and two mounting lugs, the bottom plate is mounted on the fixed die frame, the two mounting lugs are mounted on the bottom plate in parallel, the ejector rod is mounted between the two mounting lugs through a pin, and the ejector rod can rotate around the pin;
the elastic block ejection mechanism comprises an elastic block, a shoulder bolt and a spring, the spring is arranged below the elastic block, and the shoulder bolt penetrates through the elastic block and the spring and is fixed on the fixed die frame.
2. The ejection mechanism of claim 1, wherein the hydraulic mechanism corresponds to two linkage mechanisms, two ends of the pressing rod respectively press against the tail end of the corresponding ejector rod, and the head end of each ejector rod abuts against the corresponding guide post.
3. The injection mold ejection mechanism of claim 2, wherein the piston rod of the hydraulic cylinder is fixedly connected to the middle of the hold-down rod by a screw.
4. An injection mold ejection mechanism according to claim 3, wherein the ejector rod and the pressure rod are both of a rectangular parallelepiped structure, and both ends of the pressure rod are pressed above the tail end of the corresponding ejector rod.
5. An injection mold ejection mechanism as in claim 1, wherein the ejector rod rotates clockwise.
6. The injection mold ejection mechanism of claim 1, wherein the base plate of the base is square, and four screw holes are provided on the base plate, and the base plate is fixed on the mold fixing frame by screws.
7. The injection mold ejection mechanism of claim 1, wherein the guide post is secured to the spring block by a screw.
8. An injection mold employing the injection mold ejection mechanism of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910205248.4A CN109910242B (en) | 2019-03-18 | 2019-03-18 | Injection mold ejection mechanism and injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910205248.4A CN109910242B (en) | 2019-03-18 | 2019-03-18 | Injection mold ejection mechanism and injection mold |
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| Publication Number | Publication Date |
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| CN109910242A CN109910242A (en) | 2019-06-21 |
| CN109910242B true CN109910242B (en) | 2021-06-29 |
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| CN201910205248.4A Active CN109910242B (en) | 2019-03-18 | 2019-03-18 | Injection mold ejection mechanism and injection mold |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206416450U (en) * | 2016-12-17 | 2017-08-18 | 台州市黄岩伟多塑料模具厂 | Automobile lampshade outer casing mold and its guide pillar bullet block structure |
| CN207669654U (en) * | 2017-11-02 | 2018-07-31 | 常州星宇车灯股份有限公司 | A kind of bullet block structure for penetrating pushing method for double-colored inverted mold first |
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