Mould mechanism for preventing product back-jacking

Abstract

The utility model relates to the technical field of dies, in particular to a die mechanism capable of preventing back ejection of products, which comprises an upper die holder and a lower die holder, an upper die forming block is fixedly connected to the lower end of the upper die holder, an upper die pressure plate is arranged on the outer side of the upper die forming block, and the upper die pressure plate is connected with the upper die holder through an upper die nitrogen spring. A lower die plate is arranged above the lower die base, a cavity is formed in the lower die plate, a lower die pressing core is sleeved with the cavity, the upper portion of the lower die base is connected with the lower end of the lower die pressing core through a lower die nitrogen spring, the lower end of the lower die pressing core is connected with a second ejector rod, and the lower portion of the second ejector rod penetrates through the lower die base to be connected with a lower die knock-out plate arranged below the lower die base. The outer side of the lower die knock-out plate is connected with a first ejector rod upwards penetrating through the lower die base and the lower die plate. Compared with the prior art, the lower die knock-out plate, the first ejector rod and the second ejector rod are arranged, so that the material pressing core moves up and down along with the upper die material pressing plate, the material pressing core ascends firstly and then is stripped during stripping, and a product can be effectively prevented from rebounding.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a mold mechanism for preventing products from returning to the top. Background Art

[0002] In the traditional mechanism to prevent the product from returning to the top, the original pressing nitrogen spring is generally replaced with a more expensive time-delay nitrogen spring. This method is costly, occupies a large space, has a complex structure, is complicated to install and debug, and is prone to induction failure during mass production. This method is only suitable for products with low appearance requirements and soft hardness. If the product is small and there is not enough space to put the time-delay nitrogen spring, this mechanism will hardly meet the product molding and mass production requirements. Summary of the invention

[0003] The utility model provides a mold mechanism for preventing products from returning to the top in order to overcome the shortcomings of the prior art.

[0004] In order to achieve the above-mentioned purpose, a mold mechanism for preventing product back-topping is designed, including an upper mold base and a lower mold base, the lower end of the upper mold base is fixedly connected with an upper mold forming block, the outer side of the upper mold forming block is provided with an upper mold pressing plate, the upper mold pressing plate is connected to the upper mold base through an upper mold nitrogen spring, a lower mold plate is provided above the lower mold base, a cavity is provided in the lower mold plate, a lower mold pressing core is sleeved in the cavity, the upper part of the lower mold base is connected with the lower end of the lower mold pressing core through a lower mold nitrogen spring, the lower end of the lower mold pressing core is connected with a second ejector rod, the lower part of the second ejector rod passes through the lower mold base and is connected to a lower mold knockout plate arranged below the lower mold base, and the outer side of the lower mold knockout plate is connected with a first ejector rod passing upward through the lower mold base and the lower mold base.

[0005] The top end of the upper die seat is connected with a nitrogen spring seat, the top end of the upper die nitrogen spring is fixedly installed in the nitrogen spring seat, and the bottom end of the upper die nitrogen spring extends out of the upper die seat and is connected with the upper die pressing plate.

[0006] An upper die outer limiter is connected to the lower outer side of the upper die seat, and a lower die outer limiter is connected to the upper outer side of the lower die seat. The upper die outer limiter corresponds to the lower die outer limiter.

[0007] The lower end of the upper die seat is connected with an upper pad, and the top of the upper die forming block is embedded in the upper pad.

[0008] The upper end of the lower die seat is connected with a lower pad, and the upper end of the lower pad is connected with the lower die plate.

[0009] An air escape hole is arranged in the upper mold forming block.

[0010] The lower end of the lower die seat is connected to the lower pad foot, and the lower end of the lower pad foot is connected to the lower supporting plate.

[0011] Compared with the prior art, the utility model provides a lower die knockout plate and push rods one and two, so that the pressing core moves up and down with the upper die pressing plate. When removing materials, the pressing core rises first and then removes the materials, which can effectively prevent product rebound. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a closed mold schematic diagram of the utility model.

[0013] Figure 2 It is a schematic diagram of mold opening of the utility model.

[0014] See also Figure 1-Figure 2 , among which, 1 is the upper die seat, 2 is the upper die outer limit, 3 is the material, 4 is the lower die outer limit, 5 is the lower die seat, 6 is the lower foot, 7 is the lower support plate, 8 is the upper die nitrogen spring, 9 is the upper pad, 10 is the upper die forming block, 10-1 is the vent hole, 11 is the upper die pressing plate, 12 is the lower die pressing core, 13 is the lower mold plate, 14 is the lower pad, 15 is the ejector pin one, 16 is the ejector pin two, 17 is the lower die knockout plate, 18 is the lower die nitrogen spring, and 19 is the nitrogen spring seat. DETAILED DESCRIPTION

[0015] The utility model is further described below with reference to the accompanying drawings.

[0016] like Figure 1-Figure 2 As shown, the lower end of the upper die base 1 is fixedly connected with an upper die forming block 10, and the outer side of the upper die forming block 10 is provided with an upper die pressing plate 11, and the upper die pressing plate 11 is connected to the upper die base 1 through an upper die nitrogen spring 8, and a lower die plate 13 is provided above the lower die base 5, and a cavity is provided in the lower die plate 13, and a lower die pressing core 12 is sleeved in the cavity, and the upper part of the lower die base 5 is connected to the lower end of the lower die pressing core 12 through a lower die nitrogen spring 18, and the lower end of the lower die pressing core 12 is connected to a push rod 2 16, and the lower part of the push rod 2 16 passes through the lower die base 5 and is connected to a lower die knockout plate 17 arranged below the lower die base 5, and the outer side of the lower die knockout plate 17 is connected to a push rod 15 that passes upward through the lower die base 5 and the lower die plate 13.

[0017] The top of the upper die base 1 is connected with a nitrogen spring seat 19, the top of the upper die nitrogen spring 8 is fixedly installed in the nitrogen spring seat 19, and the bottom of the upper die nitrogen spring 8 extends out of the upper die base 1 and is connected to the upper die pressing plate 11. The nitrogen spring seat 19 allows the upper die nitrogen spring 8 to be embedded in the interior of the upper die base 1, which can save space.

[0018] The upper die outer limit 2 is connected to the lower outer side of the upper die seat 1, and the lower die outer limit 4 is connected to the upper outer side of the lower die seat 5. The upper die outer limit 2 corresponds to the lower die outer limit 4. The upper die outer limit 2 and the lower die outer limit 4 allow the height of the mold to be limited when the mold is closed.

[0019] The lower end of the upper die base 1 is connected with an upper pad 9, and the top of the upper die forming block 10 is embedded in the upper pad 9. The upper pad 9 makes the upper die forming block 10 more stable.

[0020] The upper end of the lower die base 5 is connected to a lower pad 14 , and the upper end of the lower pad 14 is connected to the lower die plate 13 .

[0021] An air escape hole 10-1 is provided in the upper mold forming block 10. The air escape hole 10-1 prevents air from being trapped between the material and the upper mold forming block 10 during molding and demoulding. The outlet of the air escape hole 10-1 can be set at the top to discharge air by setting a through hole in the upper mold base 1, or it can be set at the side of the upper mold forming block 10 to discharge air.

[0022] The lower end of the lower die base 5 is connected to the lower pad 6, and the lower end of the lower pad 6 is connected to the lower support plate 7. The lower support plate 7 is used to be connected to the punching machine.

[0023] When the utility model is used, the material 3 is placed on the ejector 15, the upper die seat 1 moves downward, the upper die pressing plate 11 presses the material on the ejector 15, and then the ejector 15 drives the lower die knockout plate 17 to move downward first, while the ejector 2 16 drives the lower die pressing core 12 to move downward along the cavity, and the lower die nitrogen spring 18 is compressed. After the upper die pressing plate 11 presses the material 3 onto the lower die plate 13, the upper die nitrogen spring 8 begins to compress, and the upper die forming block 10 presses downward to close with the lower die pressing core 12 for forming.

[0024] When the mold is opened, the upper mold base 1 moves upward, the push rod 15 supports the upper mold pressing plate 11, and the lower mold nitrogen spring 18 pushes the lower mold pressing core 12 and the upper mold pressing plate 10 upward, so that the side of the product is demolded first, and the lateral pressure of the lower mold plate 13 on the product is released. After the push rod 15 rises to the top, the upper mold forming block 10 is separated from the lower mold pressing core 12, so that the product is completely demolded. By raising the pressing core first and then demolding, the product can be effectively prevented from rebounding.

Claims

1. A mold mechanism for preventing a product from returning to the top, comprising an upper mold base (1) and a lower mold base (5), characterized in that: The lower end of the upper die base (1) is fixedly connected to an upper die forming block (10), an upper die pressing plate (11) is arranged on the outer side of the upper die forming block (10), and the upper die pressing plate (11) is connected to the upper die base (1) via an upper die nitrogen spring (8). A lower die plate (13) is arranged above the lower die base (5), a cavity is arranged in the lower die plate (13), and a lower die pressing core (12) is sleeved in the cavity. The upper side of the lower die base (5) is connected to the lower end of the lower die pressing core (12) via a lower die nitrogen spring (18), and the lower end of the lower die pressing core (12) is connected to a second ejector rod (16), and the lower side of the second ejector rod (16) passes through the lower die base (5) and is connected to a lower die knockout plate (17) arranged below the lower die base (5), and the outer side of the lower die knockout plate (17) is connected to a first ejector rod (15) that passes through the lower die base (5) and the lower die plate (13) upward.

2. A mold mechanism for preventing product top-up according to claim 1, characterized in that: The top end of the upper die seat (1) is connected to a nitrogen spring seat (19), the top end of the upper die nitrogen spring (8) is fixedly installed in the nitrogen spring seat (19), and the bottom end of the upper die nitrogen spring (8) extends out of the upper die seat (1) and is connected to the upper die pressing plate (11).

3. A mold mechanism for preventing product top-up according to claim 1, characterized in that: An upper die outer limiter (2) is connected to the lower outer side of the upper die seat (1), and a lower die outer limiter (4) is connected to the upper outer side of the lower die seat (5). The upper die outer limiter (2) corresponds to the lower die outer limiter (4).

4. A mold mechanism for preventing product top-up according to claim 1, characterized in that: The lower end of the upper die seat (1) is connected to an upper pad (9), and the top of the upper die forming block (10) is embedded in the upper pad (9).

5. A mold mechanism for preventing product top-up according to claim 1, characterized in that: The upper end of the lower die seat (5) is connected to a lower pad (14), and the upper end of the lower pad (14) is connected to the lower die plate (13).

6. A mold mechanism for preventing product top-up according to claim 1, characterized in that: An air escape hole (10-1) is provided in the upper mold forming block (10).

7. A mold mechanism for preventing product top-up according to claim 1, characterized in that: The lower end of the lower die base (5) is connected to the lower pad foot (6), and the lower end of the lower pad foot (6) is connected to the lower support plate (7).

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