Tapered wedge block secondary ejection mechanism

Abstract

The utility model provides a secondary ejection mechanism for a tapered wedge block, and relates to the technical field of mold structures. Comprising a mold frame, a fixed plate B and a push plate arranged above the fixed plate B are arranged on the mold frame, and the secondary ejection mechanism further comprises at least two secondary ejection mechanisms arranged on the mold frame. The secondary ejection mechanism comprises an ejector plate, a secondary ejection rod connected to the ejector plate, a secondary ejection stop block connected to the push plate and arranged above the secondary ejection rod, and an inclined wedge block connected to the fixed plate B; wherein the secondary ejection rods are distributed on the two sides of the inclined wedge block, one end of each secondary ejection rod is hinged to the ejector plate, and the other end of each secondary ejection rod is provided with an inclined plane suitable for being matched with the inclined wedge block. By means of the scheme, the mold structure can be optimized, and secondary ejection can be achieved conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to die structure technical field, specifically, relate to a inclined wedge block secondary ejection mechanism. BACKGROUND

[0002] For some complex shape, uneven wall thickness or have special structure product, the first ejection may not be able to completely out of the product die, and may even lead to product deformation or damage, therefore need to take the secondary ejection scheme to make the product completely out of the die. The traditional inclined wedge block secondary ejection mechanism may need additional complex structure, such as double ejector pin plate, complex limiting device etc. This will increase the thickness and complexity of the die, leading to the die cost rising, and may exceed the die casting machine or injection molding machine adaptation requirement. In addition, in some existing inclined wedge block secondary ejection mechanism, due to the unbalanced ejection action, may lead to die in the ejection process offset or local excessive stress, and further damage the die. SUMMARY

[0003] The utility model discloses a inclined wedge block secondary ejection mechanism, aims at solving the above-mentioned problem.

[0004] The utility model discloses the following scheme is adopted:

[0005] A kind of inclined wedge block secondary ejection mechanism, including die carrier, the fixed B plate is arranged on the die carrier and the push plate is arranged above the fixed B plate, further including at least two secondary ejection mechanisms set on the die carrier, the secondary ejection mechanism includes ejector pin plate, secondary ejection rod connected on ejector pin plate, secondary ejection stopper connected on push plate and arranged above the secondary ejection rod and inclined wedge block connected on the fixed B plate;Wherein, the secondary ejection rod is distributed and arranged at the two sides of the inclined wedge block, and one end of the secondary ejection rod is hinged on the ejector pin plate, and the other end is provided with the inclined surface suitable for matching the inclined wedge block;When the ejector pin plate is on top to make the secondary ejection rod drive the secondary ejection stopper synchronous rise until the inclined surface of the secondary ejection rod meets the inclined wedge block, two the secondary ejection rod opens outward to make secondary ejection rod separate from secondary ejection stopper, and complete first ejection;When the ejector pin plate continues to eject and makes the inclined surface contact with the secondary ejection stopper, the secondary ejection stopper is continuously pushed out by the inclined surface to realize secondary ejection.

[0006] Further, elastic tension spring is connected between two the secondary ejection rod.

[0007] Further, the inclined surface of the secondary ejection rod is provided with stroke portion above.

[0008] Further, the secondary ejection mechanism is provided with two, and is respectively arranged at the opposite two sides of the die carrier.

[0009] Further, the secondary ejection rod is hinged to the side of the ejector plate through a rotating shaft.

[0010] Advantages:

[0011] The inclined wedge block secondary ejection mechanism can effectively eject the product from the mold, avoid the product from being stuck or deformed during the first ejection, and can be arranged on the outside of the mold frame during the secondary ejection, so that the ejection force can be evenly applied, the local pressure on the product is reduced, and the risk of surface damage of the product is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural schematic view of an inclined wedge block secondary ejection mechanism according to an embodiment of the present application;

[0013] Figure 2 is a secondary ejection mechanism distribution schematic view of an inclined wedge block secondary ejection mechanism according to an embodiment of the present application;

[0014] The drawings show: mold frame 1, secondary ejection mechanism 2, ejector plate 21, secondary ejection rod 22, inclined surface 221, stroke part 222, elastic tension spring 23, secondary ejection block 24, inclined wedge block 25, rotating shaft 26, fixed B plate 3, push plate 4. DETAILED DESCRIPTION

[0015] In combination with Figure 1 the drawings, the embodiment provides a mold, which comprises an inclined wedge block secondary ejection mechanism. The inclined wedge block secondary ejection mechanism comprises a mold frame 1, the mold frame 1 is provided with a fixed B plate 3 and a push plate 4 arranged above the fixed B plate 3, and further comprises at least two secondary ejection mechanisms 2 arranged on the mold frame 1, the secondary ejection mechanism 2 comprises an ejector plate 21, a secondary ejection rod 22 connected to the ejector plate 21, a secondary ejection block 24 connected to the push plate 4 and arranged above the secondary ejection rod 22, and an inclined wedge block 25 connected to the fixed B plate 3; the two secondary ejection rods 22 are connected with an elastic tension spring 23.

[0016] In combination with Figures 1 to 2As shown, the secondary ejection rods 22 are arranged on both sides of the cam block 25, and one end of the secondary ejection rod 22 is hinged to the ejector plate 21, and the other end is provided with a slope 221 suitable for matching the cam block 25; when the ejector plate 21 is ejected to make the secondary ejection rod 22 drive the secondary ejection block 24 to rise synchronously until the slope 221 of the secondary ejection rod 22 collides with the cam block 25, the two secondary ejection rods 22 are opened outward to make the secondary ejection rod 22 separate from the secondary ejection block 24, and the first ejection is completed; when the ejector plate 21 continues to eject to make the slope 221 contact with the secondary ejection block 24, the secondary ejection block 24 is continuously pushed out through the slope 221 to realize the secondary ejection.

[0017] In the embodiment, the ejector plate 21 is arranged in the mold frame 1, and is connected with a power mechanism so that the ejector plate 21 can be ejected towards the direction of the push plate 4. The secondary ejection mechanism 2 can be provided with two, and is arranged on the opposite sides of the mold frame 1 respectively. Thus, the push plate 4 can be ejected on both sides at the same time, so that the stress of the push plate 4 is more uniform during ejection, and the product is effectively protected. It should be noted that in some embodiments, the cam block secondary ejection mechanism can be provided with more on the mold frame 1.

[0018] The secondary ejection mechanism 2 includes two ejection rods which are arranged in parallel in the non-ejection state. The bottom end of each secondary ejection rod 22 is hinged to the ejector plate 21 through a rotating shaft 26, the upper side of the secondary ejection rod 22 is provided with a slope 221 which expands outward from bottom to top, a stroke part 222 is formed above the slope 221, and the slopes 221 of the two secondary ejection rods 22 form a V-shaped shape. The slope 221 is provided below with the elastic tension spring 23. The elastic tension spring 23 can pull the two secondary ejection rods 22 tightly on both sides of the cam block 25 in the non-ejection state, and pull the two secondary ejection rods 22 which are opened outward back to the parallel state after the secondary ejection is completed and the ejector plate 21 retreats.

[0019] The cam block 25 is arranged on the fixed B plate 3, and the bottom sides thereof are provided with inclined connecting surfaces matched with the slopes 221 of the secondary ejection rods 22. The secondary ejection block 24 is arranged above the secondary ejection rod 22, and can drive the push plate 4 to rise synchronously when the secondary ejection rod 22 moves upward.

[0020] When working, the ejector plate 21 starts to move upward under the action of the ejection system; the secondary ejection rod 22 is installed on the ejector plate 21, and with the rising of the ejector plate 21, the secondary ejection rod 22 drives the secondary ejection block 24 and the push plate 4 to move upward together. At this time, the top of the secondary ejection rod 22 is closely matched with the secondary ejection block 24, the push plate 4 moves synchronously with the secondary ejection block 24, and the product is pushed to be ejected for the first time;

[0021] As the ejector plate 21 continues to rise, the inclined surface 221 on the secondary ejector rod 22 will contact the wedge block 25. When the inclined surface 221 on the secondary ejector rod 22 touches the wedge block 25, due to the inclined connection surface design of the wedge block 25, the secondary ejector rod 22 will rotate around the pivot 26. The rotation of the secondary ejector rod 22 will cause the secondary ejector rod 22 to open outward, thereby breaking free from the restriction of the secondary ejector block 24. At this time, the elastic spring 23 is stretched.

[0022] After the secondary ejector rod 22 disengages from the secondary ejector block 24, the ejector plate 21 continues to move upward, causing the secondary ejector block 24 to slide along the stroke section 222 (at this time, the secondary ejector block 24 is not lifted) until the inclined surface 221 contacts the secondary ejector block 24, and pushes the secondary ejector block 24 out for the second time, completely ejecting the product from the mold cavity;

[0023] After demolding is completed, the ejector plate 21 retracts, and the two secondary ejector rods 22 rotate in opposite directions under the action of the elastic tension spring 23 until they are reset to a parallel state.

[0024] This embodiment can be applied to plastic molds or metal molds, and has the following advantages:

[0025] Improve ejection efficiency: Secondary ejection can more effectively eject products from the mold, avoiding jamming or deformation of the product during the first ejection.

[0026] Reduce product damage: Secondary ejection can apply ejection force more evenly, reducing local pressure on the product and thus reducing the risk of product surface damage.

[0027] Adaptable to complex products: For some products with complex structures and uneven wall thickness, the wedge block secondary ejection mechanism can better adapt to their ejection requirements.

[0028] It is important to note that the angle of the inclined plane 221 and the shape of the wedge block 25 are precisely designed according to actual needs to ensure that the secondary jacking rod 22 can rotate and open smoothly. The rotating shaft 26 has sufficient strength and stability to withstand the torque when the secondary jacking rod 22 rotates. Ensuring a reasonable distribution of the ejection force between the first and second ejections during the design process can prevent the ejection force from being too large or too small.

[0029] It should be understood that the above are only preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions that fall within the scope of the present utility model are protected by the present utility model.

[0030] The above introduction of the drawings used in the embodiments only shows some embodiments of the utility model, and should not be regarded as limitation to the scope. For ordinary skilled in the art, other related drawings can also be obtained according to the drawings without creative labor.

Claims

1. A inclined wedge secondary ejection mechanism, comprising a mould frame, a fixed B plate is arranged on the mould frame, and a push plate is arranged above the fixed B plate, characterized in that, The device further comprises at least two secondary ejection mechanisms arranged on the mold frame, wherein the secondary ejection mechanism comprises a needle plate, a secondary ejection rod connected to the needle plate, a secondary ejection block arranged above the secondary ejection rod and connected to the push plate, and an inclined wedge block connected to the fixed B plate; wherein the secondary ejection rods are arranged on both sides of the inclined wedge block, and one end of the secondary ejection rod is hinged to the needle plate, and the other end is provided with an inclined surface matched with the inclined wedge block. When the needle plate is pushed to make the secondary ejection rod drive the secondary ejection block to rise synchronously until the inclined surface of the secondary ejection rod collides with the inclined wedge block, the two secondary ejection rods are spread outwards to make the secondary ejection rod separate from the secondary ejection block, and the first ejection is completed; when the needle plate continues to be pushed to make the inclined surface contact with the secondary ejection block, the secondary ejection block is continuously pushed out through the inclined surface to realize the secondary ejection.

2. The angled block secondary ejection mechanism of claim 1, wherein, The two secondary ejection rods are connected by an elastic tension spring.

3. The angled block secondary ejection mechanism of claim 1, wherein, The inclined surface of the secondary ejection rod is provided with a stroke part above.

4. The angled block secondary ejection mechanism of claim 1, wherein, The secondary ejection mechanism is provided with two, and is arranged on the opposite sides of the mold frame.

5. The angled block secondary ejection mechanism of claim 1 wherein, The secondary ejection rod is hinged to the side surface of the needle plate through a rotating shaft.

Images