Mechanical secondary ejection mechanism

Abstract

The present invention discloses a mechanical secondary ejection mechanism; it comprises a straight ejector seat, a straight ejector rod, a guide rod, a positioning block, a limit block, a positioning key, a positioning pin, and a guide block; the lower part of the straight ejector rod is movably sleeved in the straight ejector seat, the positioning block is movably inserted in the lower part of the straight ejector rod along the X-axis direction, the limit block is fixedly inserted in the lower part of the straight ejector rod along the Y-axis direction and the inner end of the limit block is inserted into the limit groove of the positioning block, the positioning key is movably sleeved in the side groove of the straight ejector seat and the middle through groove gap of the positioning key is sleeved on the upper part of the positioning pin, and the lower end of the positioning pin is fixed on the straight ejector seat. Since the positioning block inside the straight ejector rod of the present invention is pushed into the outer key groove by the inclined surface of the straight ejector seat for positioning, the straight ejector rod cannot continue to push the product upward, completing one ejection, and the inclined ejector rod continues to push upward under the push of the ejector plate to eject the product twice. The stability of the mold of the present invention is relatively high, and the production life of the mold is improved.

Description

Technical Field

[0001] The invention relates to an injection mold, in particular to a mechanical secondary ejection mechanism. Background Art

[0002] Plastic injection molds are tools for producing plastic products and are widely used. In the injection molding of plastic products, for some products with a relatively large projection area, secondary ejection is required to meet the needs of the molding process. For example, the rearview mirror bracket of an automobile has a relatively large product projection area and the undercut cannot be directly ejected by tilting. Considering the large covering area, there is a concern that the robot will be injured after ejection. Therefore, a secondary ejection mechanism needs to be designed. After the product is loosened, it is ejected again and the product is taken out. A traditional secondary ejection mechanism uses a spring to complete the secondary ejection. Due to the limited service life of the spring, it will fail, which is not conducive to the service life of the mold. Another traditional secondary ejection mechanism is to add a standard buckle machine to the ejector plate to drive the secondary ejection action. This structure increases the mold cost. Summary of the invention

[0003] The object of the present invention is to provide a mechanical secondary ejection mechanism with long service life and low cost.

[0004] To achieve the above purpose, the technical solution of the present invention is:

[0005] The present invention discloses a mechanical secondary ejection mechanism, which comprises a straight ejection seat, a straight ejector rod, a guide rod, a positioning block, a limiting block, a positioning key, a positioning pin and a guide block; the guide block is fixed to the bottom surface of the movable template and is opposite to the ejector plate, the lower end of the guide rod is fixed to the bottom plate and the upper end thereof is fixed in the guide block, the straight ejection seat is fixedly installed in the ejector plate, the lower part of the straight ejector rod is movably sleeved in the straight ejection seat, the upper end of the straight ejector rod is connected to the ejector rod, the positioning block is movably inserted in the lower part of the straight ejector rod along the X-axis direction and the two ends of the positioning block can pass through the straight ejector rod, the limiting block is fixedly inserted in the lower part of the straight ejector rod along the Y-axis direction and the inner end of the limiting block is inserted into the limiting groove of the positioning block, the positioning key is movably sleeved in the straight ejector rod The side groove of the ejector seat and the gap in the middle groove of the positioning key are sleeved on the upper part of the positioning pin, and the lower end of the positioning pin is fixed on the straight ejector seat; the two side walls of the lower part of the straight ejector rod are respectively provided with external key grooves for the positioning key to slide into, and the inner side wall of the guide rod is sequentially provided with a positioning block groove for the positioning block to slide into and an inner key groove for the positioning key to slide into from top to bottom, the inner key groove of the guide rod is opposite to the outer key groove of the straight ejector rod, and the two ends of the positioning key slidably connected in the side groove of the straight ejector seat can slide into the inner key groove of the guide rod and the outer key groove of the straight ejector rod respectively, one end of the positioning block slidably connected to the lower part of the straight ejector rod is against the inclined top surface on one side of the straight ejector seat, and the other end of the positioning block is clamped in the positioning block groove of the guide rod under the top pressure of the inclined top surface of the straight ejector seat.

[0006] The lower part of the straight push rod is provided with an X groove and a Y groove which intersect vertically; the positioning block is movably sleeved in the X groove of the straight push rod, and the limiting block is fixed in the Y groove of the straight push rod.

[0007] The invention also comprises a reinforcing block, which is fixed at the lower part of the straight push rod and is located above the positioning block to play a guiding role.

[0008] The invention also comprises a return plate which is fixed on the lower end of the straight push rod.

[0009] After adopting the above scheme, since the present invention includes a straight ejector seat, a straight ejector rod, a guide rod, a positioning block, a limiting block, a positioning key, and a positioning pin, one end of the positioning key can slide into the positioning block groove and the inner key groove on the inner wall of the guide rod, and the other end of the positioning key can slide into the outer key groove at the lower part of the straight ejector rod. After the positioning key in the straight ejector seat slides into the guide rod groove, the straight ejector rod is released, and the positioning block in the straight ejector rod is pushed into the outer key groove by the inclined surface of the straight ejector seat to be positioned, so that the straight ejector rod cannot continue to push the product upward, and one ejection is completed. The inclined ejector rod continues to push upward under the push of the ejector plate to eject the product twice. The present invention improves the stability of the mold as a whole and increases the production life of the mold.

[0010] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is an axonometric view of the present invention;

[0012] Figure 2 is a three-dimensional exploded view of the present invention;

[0013] Figure 3 is an axonometric view of the present invention in a static state;

[0014] Figure 4 is a cross-sectional view of the present invention in a static state;

[0015] Figure 5 is a cross-sectional view of the first ejection state of the present invention;

[0016] Figure 6 is a cross-sectional view of the second ejection state of the present invention;

[0017] Figure 7 yes Figure 6 Basic enlargement at A. DETAILED DESCRIPTION

[0018] like Figure 1-Figure 3 , Figure 7As shown, the present invention is a mechanical secondary ejection mechanism; it includes a straight ejector seat 1, a straight ejector rod 2, a guide rod 3, a positioning block 4, a limit block 5, a positioning key 6, a positioning needle 7, a guide block 8, a reinforcement block 9, a return plate 10 and an inclined ejector rod 11, an ejector rod 12, a square iron 13, an ejector plate 14, a movable template 15, and a bottom plate 16.

[0019] The bottom surface of the movable template 15 is fixed to the bottom plate 16 by the square iron 13, and an ejection space is formed between the movable template 15 and the bottom plate 16. The ejector plate 14 is movably arranged in the ejection space. The lower end of the inclined ejector rod 11 is connected to the ejector plate 14, and the upper end of the inclined ejector rod 11 extends into the mold cavity.

[0020] The guide block 8 is fixed on the bottom surface of the movable plate 15 and is opposite to the ejector plate 14. There are two guide rods 3, the lower ends of the two guide rods 3 are fixed on the bottom plate 16 and the upper ends are fixed in the guide block 8, the straight ejector seat 1 is fixedly installed in the ejector plate 14, the lower part of the straight ejector rod 2 is movably sleeved in the straight ejector seat 1, the upper end of the straight ejector rod 2 is connected to the ejector rod 12, and the upper end of the ejector rod 12 extends into the mold cavity.

[0021] The lower part of the straight push rod 2 is provided with an X-groove 21 and a Y-groove 22 which intersect vertically, and the X-groove 21 and the Y-groove 22 are arranged along the X-axis direction and the Y-axis direction respectively; the positioning block 4 is movably sleeved in the X-groove 21 of the straight push rod 2, and the two ends of the positioning block 4 can pass through the straight push rod, the limit block 5 is fixed in the Y-groove 22 of the straight push rod, and the inner end of the limit block 5 is inserted into the limit groove 41 of the positioning block 4; the positioning key 6 is movably sleeved in the side groove 11 of the straight push seat 1, and the middle through groove 61 of the positioning key 6 is sleeved on the upper part of the positioning pin 7, and the lower end of the positioning pin 7 is fixed on the straight push seat 1; on the two side walls of the lower part of the straight push rod 2 The outer key grooves 23 for the positioning key 6 to slide into are respectively opened, and the inner side wall of the guide rod 3 is sequentially opened from top to bottom with the positioning block groove 31 for the positioning block 4 to slide into and the inner key groove 32 for the positioning key 6 to slide into. The inner key groove 31 of the guide rod 3 is opposite to the outer key groove 23 of the straight push rod 2. The two ends of the positioning key 6 slidably connected in the side groove 11 of the straight push seat 1 can slide into the inner key groove 32 of the guide rod 3 and the outer key groove 23 of the straight push rod 2 respectively. One end of the positioning block 4 slidably connected to the lower part of the straight push rod 2 is against the inclined top surface 12 of one side of the straight push seat 1. Under the pressure of the inclined top surface 12 of the straight push seat 1, the other end of the positioning block 4 is clamped into the positioning block groove 31 of the guide rod 3. The reinforcing block 9 is fixed to the lower part of the straight push rod 2 and is located above the positioning block 4, playing a guiding role. The return plate 10 is fixed to the lower end of the straight push rod 2.

[0022] Working principle of the present invention:

[0023] 1. If Figure 4As shown, in the static state, the total ejection stroke is 115MM. The straight ejector 2, the ejector 12 and the inclined ejector 11 eject 105mm for the first time, and the straight ejector 2 is restrained and does not move; the inclined ejector 11 continues to eject 10mm for the second time, and the product 20 is ejected.

[0024] 2. If Figure 5 As shown, the positioning block 4 in the straight ejector seat 1 clamps the straight ejector rod 2 to complete the first ejection; the straight ejector rod 2 is restricted and immobile.

[0025] 3. If Figure 6 , Figure 7 As shown, the straight ejector seat 1 fixed on the ejector plate 14 continues to eject 10 mm. During this period, the positioning key 6 in the straight ejector seat 1 runs to the inner keyway 32 of the guide rod 3 and then releases the straight ejector rod 2; the positioning block 4 in the straight ejector rod 2 relies on the inclined top surface 12 of the straight ejector seat 1 (such as Figure 5 As shown in the figure, push it into the positioning block groove 31 to position it.

[0026] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of implementation of the present invention. That is, equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the specification should still fall within the scope covered by the patent of the present invention.

Claims

1. A mechanical secondary ejection mechanism; characterized in that: It includes a straight ejector seat, a straight ejector rod, a guide rod, a positioning block, a limit block, a positioning key, a positioning needle and a guide block; the guide block is fixed on the bottom surface of the movable template and is opposite to the ejector plate, the lower end of the guide rod is fixed on the bottom plate and the upper end thereof is fixed in the guide block, the straight ejector seat is fixedly installed in the ejector plate, the lower part of the straight ejector rod is movably sleeved in the straight ejector seat, the upper end of the straight ejector rod is connected to the ejector rod, the positioning block is movably penetrated in the lower part of the straight ejector rod along the X-axis direction and the two ends of the positioning block can pass through the straight ejector rod, the limit block is fixedly penetrated in the lower part of the straight ejector rod along the Y-axis direction and the inner end of the limit block is inserted into the limit groove of the positioning block, the positioning key is movably sleeved in the side groove of the straight ejector seat and the through groove gap in the middle of the positioning key is sleeved on the upper part of the positioning needle, and the lower end of the positioning needle is fixed in the straight ejector seat On the upper side; the two side walls of the lower part of the straight push rod are respectively provided with external key grooves for the positioning key to slide into, and the inner side wall of the guide rod is sequentially provided with a positioning block groove for the positioning block to slide into and an inner key groove for the positioning key to slide into from top to bottom, the inner key groove of the guide rod is opposite to the outer key groove of the straight push rod, and the two ends of the positioning key slidably connected in the side groove of the straight push rod can slide into the inner key groove of the guide rod and the outer key groove of the straight push rod respectively, one end of the positioning block slidably connected to the lower part of the straight push rod is against the inclined top surface of one side of the straight push seat, and the other end of the positioning block is clamped into the positioning block groove of the guide rod under the top pressure of the inclined top surface of the straight push seat, and the lower part of the straight push rod is provided with an X groove and a Y groove intersecting vertically; the positioning block is movably sleeved in the X groove of the straight push rod, and the limit block is fixed in the Y groove of the straight push rod.

2. The mechanical secondary ejection mechanism according to claim 1, characterized in that: It also includes a reinforcing block, which is fixed at the lower part of the straight push rod and located above the positioning block to play a guiding role.

3. The mechanical secondary ejection mechanism according to claim 1, characterized in that: The utility model also comprises a return plate which is fixed on the lower end of the straight push rod.

Images