Patent Application
20120107441
1. Field of the Invention
The present invention generally relates to a mold, and more particularly to a mold having push-out structure.
2. Description of Prior Art
The push-out structure of the mold, employed to push out the product from the mold a fixed half, a mixing half and a push-out structure. The fixed half comprises a cavity fixing plate, a lower fixing plate fixed under the cavity fixing plate, a pair of spacing blocks positioned between the cavity fixing plate and the lower fixing plate. A fixed half cavity is fixed on the cavity fixing plate. An accepting space is formed by the cavity fixing plate, the lower fixing plate and the two spacing blocks surrounding. The push-out structure comprises an upper push-out plate, a lower push-out plate and a plurality of push-out elements. The upper push-out plate and the lower push-out plate are fixed as one body and up and down movably accepted in the accepting space. The push-out elements are installed on the upper push-out plate and fixed by the upper push-out plate and the lower push-out plate. The tops of the push-out elements can extend out of the parting plane of the fixed half. Accordingly, the push-out elements can push out the product when the mold is opened.
However, as the aforesaid mold having the push-out structure is closed, the moving half will be closed and interfere the push-out structure before the push-out structure is not in position completely. Consequently, the parting planes of the push-out elements and the moving half can be crashed and damaged. Besides, there is loud noise caused because the moving half is crashing the fixed half with high speed at moment of completely closed. The lifetime of the mold will be effected and maintenance cost will increase.
For solving the drawbacks of aforementioned prior art, an objective of the present invention is to provide a mold having push-out structure for preventing the moving half to interfere the push-out element and to impact the fixed half.
For realizing the aforesaid objective, the mold of the present invention comprises a fixed half, a moving half, a push-out structure and a return protection system. The moving half has a pressing part. The push-out structure is installed on the fixed half. The push-out structure comprises a push-out element and a push-out plate for fixing the push-out element. The return protection system comprises a return pin and an elastic element. The elastic element is installed between the return pin and the push-out element. The pressing part can press against the return pin to drive thereof. With the elastic element, the return pin can drive the push-out structure.
As aforementioned, as the mold having the push-out structure the present invention is closed, it can prevent the moving half to interfere the push-out element and to impact the fixed half because the return pin can drive the push-out structure with the elastic element. Accordingly, the lifetimes of the push-out structure and the parting planes of the mold can be extended to reduce the maintenance cost. Noise caused by closing mold with high speed can be prevented to raise the stability and the productivity of manufacture.
Please refer to
The moving half 40 has a pressing part 41. The fixed half 10 comprises a cavity fixing plate 11, a lower fixing plate 12, a pair of spacing blocks 14 positioned between the cavity fixing plate 11 and the lower fixing plate 12. A fixed half cavity 13 is fixed on the cavity fixing plate 11. An accepting space 15 is surrounded by the cavity fixing plate 11, the lower fixing plate 12 and the two spacing blocks 14 and formed thereby.
The push-out structure 20 comprises push-out elements 23 and a push-out plate 24 fox fixing the push-out elements 23. The push-out plate 24 comprises an upper push-out plate 21 and a lower push-out plate 22 fixed with each other. The push-out elements 23 are installed on the upper push-out plate 21 and fixed by the upper push-out plate 21 and the lower push-out plate 22 together. The tops of the push-out elements 23 can be planes or inclined planes in accordance with the product. The tops of the push-out elements 23 can extend out of the parting plane of the fixed half 10. Accordingly, the push-out elements 23 can push out the product when the mold 100 is opened. A limitation hole 211 and a pass hole 212, which is positioned above the limitation hole 211 and connecting with the limitation hole 211 are formed at the bottom of the upper push-out plate 21. An accepting slot 221 in accordance with the limitation hole 211 is formed on the lower push-out plate 22.
Please refer to
When the return protection system 30 is assembled in the mold 100, the elastic element 32 is accepted in the accepting slot 221 and the top of the elastic element 32 dips into the limitation hole 211 upwards. The assembly end 312 of the return pin 31 presses against the elastic element 32. The resisting part 313 is up and down movably installed in the limitation hole 211 and the assembly end 312 outs of the pass hole 212 upwards. The push end 311 of the return pin 311 pass through the cavity fixing plate 11 and extends out of the parting plane of the fixed half 10.
Meanwhile, the push end 311 can be moved downwards and positioned in the cavity fixing plate 11 when the mold is closed.
Please refer to
When the mold is being opened, the elastic element 32 stretches up and presses the assembly end 312 to move the return pin 31 upwards. Because the return protection system 30 is installed on the push-out structure 20, the return protection system 30 and the push-out structure 20 can be moved upwards together and the push-out element 23 pushes out the product.
When the mold is being opened, the move half 40 is moved downwards and the pressing part 41 will press down the push end 311 of the return pin 31. The return pin 31 moves downwards to drive the push-out structure 20 downwards at the same time. Therefore, until the mold closing procedure is complete, the pressing part 41 of the move half 40 presses down the push end 311 of the return pin 31 but not interferes the push-out element 23. With the elasticity of the elastic element 32, the mold 100 is being closed slowly.
As aforementioned, the mold 100 of the present invention can prevent the moving half 40 to interfere the push-out element 23 and to impact the fixed half 10 because the return pin 31 can drive the push-out structure 20 with the elastic element 32. Accordingly, the lifetimes of the push-out structure 20 and the parting planes of the mold 100 can be extended to reduce the maintenance cost of the mold 100. Noise caused by closing mold 100 with high speed can be prevented to raise the stability and the productivity of manufacture.
As is understood by a person skilled in the art, the foregoing preferred embodiments of the present invention are illustrative rather than limiting of the present invention. For example, the sealing portion 222 can be formed on the moving half core 12. The bearing plates 24 can be raised from the fixed half plate 21 by machine work. Alternatively, the bearing plates 24 also can be positioned on the moving half plate 11. It is intended that they cover various modifications and similar arrangements be included within the spirit and scope of the appended claims, the scope of which should be accorded the broadest interpretation so as to encompass all such modifications and similar structure.
