CN207682859U - Injection mold ejection device mechanism - Google Patents

Abstract

The utility model provides an injection mold ejection and demoulding mechanism, which belongs to the technical field of injection molds. It solves the existing technical problems such as how to stably eject the product twice. The mold body and the top plate that can move relative to the mold body, the mold body is provided with a cavity for forming the product, and the top plate is provided with a thimble for ejecting the product. There is an I-shaped block between the top plate and an inclined slot on the I-shaped block. The top block is connected with a connecting rod that goes out of the mold body. After moving towards the direction of the mold body for one end distance, the first inclined plane drives the I-shaped block to slide laterally along the top plate. The utility model can make the force on the surface of the protruding part relatively uniform during the protruding process of the product on both sides, so as to ensure the quality of the protruding product.

Description

Injection mold ejector ejection mechanism

technical field

The utility model belongs to the field of injection molds and relates to an injection mold ejection and demoulding mechanism.

Background technique

Plastic products are widely used in our daily life. When producing most plastic products, the injection molding process is usually used. The injection molding process is to use the injection molding machine to inject molten plastic into the cavity of the mold. The structure of the cavity is the same as that of the product. After the plastic is cooled in the cavity, the mold is opened, and then the product is ejected from the cavity of the mold by the thimble. Ejection in the cavity.

When producing some plastic products with relatively complex local structures, in order to ensure that the product is not prone to sticking during the demoulding process, the more complex parts of the product will be separated from other parts and ejected twice.

my country's patent application literature (notification number: CN205522349U; announcement date: 2016.8.31) discloses a secondary ejection mechanism for injection molds, which includes a movable template and a thimble panel, and a rotatable secondary ejection mechanism is hinged on the thimble panel. The movable block is connected with a secondary ejector rod and a thimble. When the product is demolded, the ejector pin first moves together with the ejector plate, and then the ejector pin contacts the movable template through the secondary ejector rod, so that the driving ejector pin moves upward relative to the ejector plate to form a secondary ejection.

In the above technical solution, all the ejection force is generated by the ejector pin. Since the contact area between the ejector pin and the mold is small, the ejector pin is easy to form a pit on the surface of the mold.

Contents of the invention

The utility model aims at the above-mentioned problems existing in the existing technology, and provides an injection mold ejection and demoulding mechanism. The technical problem to be solved by the utility model is: how to stably eject the product for the second time.

The purpose of this utility model can be achieved through the following technical solutions:

An injection mold ejection and demoulding mechanism, comprising a mold body and a top plate that can move relative to the mold body, the mold body is provided with a cavity for forming a product, and the top plate is provided with a thimble for ejecting a product, which It is characterized in that a top block is movable in the cavity, an I-shaped block is arranged between the mold body and the top plate, an inclined slot is provided on the I-shaped block, and a through-hole is connected to the top block. Out of the connecting rod of the mold body, the end of the connecting rod is slidably engaged with the card slot. When the top plate moves towards the direction of the mold body for one end distance, the first inclined plane drives the I-shaped block to slide laterally along the top plate.

In the process of demolding, the movement of the top plate towards the mold body will drive the ejector pin, connecting rod and ejector block to move together. At this time, the ejector block and ejector pin together separate most of the area of the product from the cavity, forming the first ejection . In this process, the area where the product needs to be separated from the cavity is relatively large, and the force applied to the product by the thimble and the ejector block is also large, thereby ensuring that the product surface receives a small pressure during the first ejection process, and the product falls out during the ejection process. The medium force is stable, the product is not easy to stick to the mold or the product is not fully released, and the product will not be injured.

When the top plate continues to rise, after the I-shaped block touches the first inclined plane, it is driven by the first inclined plane to drive the lateral displacement of the I-shaped block. The lateral displacement of the I-shaped block makes the connecting rod relative to the ejector plate through the inclined slot. Move closer, so that the connecting rod drives the top block to move downward relative to the ends of other thimbles, so that the top block is separated from the product, thereby forming the secondary ejection of the product. In this way, when designing the mold, the more complicated parts of the product can be designed on the ejector block, so that the surface of the ejector block can be separated from the product during the second ejection process, and the ejector pin at this time is only used as a positional support. In this way, the force on the ejected part of the product at the ejector block can be more uniform, and there will be no severe local force in the ejection of the thimble, and avoid demoulding damage to complex parts of the product.

Such a secondary ejection mechanism can make the force on the surface of the protruding part relatively uniform during the protruding process of the product on both sides, ensuring the quality of the protruded product. Moreover, the secondary ejection can be realized only through one I-shaped block with an inclined slot, and the structure is simple and the operation is stable.

In the ejection and demoulding mechanism of the above-mentioned injection mold, a first guide block is fixedly connected to the mold body, and the first slope is located on the first guide block. The first slope is arranged on the first guide block, which facilitates the processing and adjustment of the first slope, and the first slope can be adjusted by directly replacing the first guide block.

In the above injection mold ejection and demoulding mechanism, the mold body is connected with a bottom plate, the top plate moves between the mold body and the bottom plate, and the bottom plate is fixedly connected with a second guide block penetrating through the top plate. The second guide block is provided with a second slope for driving the I-shaped block to reset. When the mold is clamped, the top block is pushed back to the original position by the mold body. During the return process, the connecting rod drives the I-shaped block to move together, and the top plate can also return to the original position when pushed by the I-shaped block. bit. In the process of returning the I-shaped block, wait until the I-shaped block touches the second inclined surface in a fixed state, and push the I-shaped block laterally to the original state through the guidance of the second inclined surface, which is convenient for the next secondary ejection.

In the above injection mold ejection and demoulding mechanism, the first slope and the second slope are parallel to each other, and when one side of the I-shaped block is in contact with the first slope, the other side of the I-shaped block is in contact with the second slope. The first inclined plane and the second inclined plane jointly form an inclined channel for laterally displacing the I-shaped block relative to the top plate during the ascent process, which facilitates the stability of the I-shaped block during the lateral displacement process relative to the top plate.

In the ejection and demoulding mechanism of the above injection mold, the I-shaped blocks are each provided with a third inclined surface for cooperating with the first inclined surface and the second inclined surface. The third slope can increase the release area of the I-shaped block, the first slope and the second slope, so that the force of the first slope and the second slope to the I-shaped block can be stably transmitted.

In the above injection mold ejection and demoulding mechanism, the second guide block is provided with a straight line portion attached to the top plate. The straight line portion on the second guide block that engages with the top plate can form engagement with the top plate, and then guide the top plate to stably move toward or away from the mold body in a straight line.

In the ejection and demoulding mechanism of the above-mentioned injection mold, the clamping groove is a T-shaped groove. The T-shaped slot can form a clamping structure on the end of the connecting rod, allowing the connecting rod to exert a force along the direction of the rod, and at the same time, the I-shaped block can have a stable lateral displacement relative to the connecting rod.

In the ejection and demoulding mechanism of the above-mentioned injection mold, when the top block is engaged in the cavity and the I-shaped block is in contact with the top plate, there is a gap between the top plate and the bottom plate. When the top plate is at the lowest point, there is still a gap between it and the bottom plate, which can prevent the top plate from directly hitting the iron filings and causing damage to the top plate when the external iron filings adhere to the bottom plate during the movement of the top plate.

Compared with the prior art, the utility model has the following advantages:

1. Through the ejector block, the force of the second ejection can be evenly released on the product, so as to ensure the quality of the ejected product, and there will be no phenomenon such as sticking to the mold.

2. The I-shaped block used for secondary ejection can return automatically, the ejection structure operates stably, and the structure is simple, only one power source is needed.

Description of drawings

Fig. 1 is a diagram of a top view of the formwork of the present embodiment.

Fig. 2 is a partial three-dimensional structural view of the embodiment except the mold body.

Fig. 3 is a cross-sectional view of A-A in Fig. 1 in a first ejection state.

Fig. 4 is a cross-sectional view of A-A in Fig. 1 in a second ejection state.

Fig. 5 is a partial enlarged view of B in Fig. 3 .

In the figure, 11, mold frame; 12, mold body; 13, cavity; 14, bottom plate; 15, gap; 21, top plate; 22, thimble; 23, top block; 24, connecting rod; 31, I-shaped block; 32. Card slot; 33. Third slope; 41. First guide block; 42. First slope; 51. Second guide block; 52. Second slope; 53. Straight line.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

As shown in Figures 1 and 2, an injection mold ejection and demoulding mechanism includes a mold frame 11, a mold body 12, a top plate 21, and a bottom plate 14 are arranged on the mold frame 11 in sequence, and the mold body 12 is provided with a mold body for forming a product. The mold cavity 13 and the bottom plate 14 are fixedly arranged on the mold base 11 , and the top plate 21 can move closer to or away from the mold body 12 between the mold body 12 and the bottom plate 14 . A plurality of thimbles 22 are pierced on the top plate 21, and the thimbles 22 run through the mold body 12. When the thimbles 22 are at the lowest point, the ends of the thimbles 22 are flush with the inner wall of the cavity 13. When the top plate 21 moves to the closest to the mold body 12 At the time, the end of the thimble 22 passes through the surface of the cavity 13 .

As shown in Figure 3 and Figure 5, a top block 23 is embedded on the cavity 13, and the top block 23 can move away from the cavity 13. The upper surface of the top block 23 is used to form the inner wall of the cavity 13. Complex structures may be distributed on the upper surface of the top block 23 . The top block 23 is connected with a connecting rod 24 passing through the mold body 12, one end of the connecting rod 24 is fixedly connected with the top block 23, and the other end of the connecting rod 24 is clamped with an I-shaped block 31, and the I-shaped block 31 is provided with an inclined shape. The card slot 32, the card slot 32 is a T-shaped structure. During the movement between the I-shaped block 31 and the top plate 21 , the top plate 21 is always in contact with the bottom of the I-shaped block 31 . Under the drive of external force, the top plate 21 conflicts with the I-shaped block 31 and then pushes the connecting rod 24 to drive the top block 23 to rise, so that the product can be demoulded, forming a one-time ejection. When the mold body 12 is reset, the mold body 12 pushes the top block 23 back, and the movement of the top block 23 can drive the top plate 21 back to the farthest position from the mold body 12 through the connecting rod 24 and the I-shaped block 31 .

A first guide block 41 is provided on the side of the mold body 12 close to the top plate 21 , and a first slope 42 is provided on a side of the first guide block 41 . A second guide block 51 is fixedly arranged on the bottom plate 14, and the second guide block 51 runs through the top plate 21. The top of the second guide block 51 is provided with a second slope 52, and the first slope 42 and the second slope 52 are parallel to each other. Together they form a sloping channel. The first guide block 41 and the second guide block 51 are used to make the I-shaped block 31 slide laterally along the top plate 21 during the vertical movement process as follows.

As shown in Figure 4, after the top plate 21 drives the I-shaped block 31 to rise for one end distance, the side of the I-shaped block 31 touches the first slope 42, and then the first slope 42 cooperates with the guidance of the second slope 52, and the I-shaped The block 31 slides sideways along the surface of the top plate 21 during ascent. During the lateral sliding process of the I-shaped block 31, its inclined draw-in groove 32 can drive the connecting rod 24 to move downward relative to the push rod, so that the push block 23 also moves downward relative to the end of the push rod, so that During the demoulding process, the product on the ejector block 23 and the ejector pin realizes secondary ejection.

When the connecting rod 24 pushes the I-shaped block 31, and then the top plate 21 moves downward, the side of the I-shaped block 31 first touches the second slope 52, and the second slope 52 cooperates with the guidance of the first slope 42, so that the working The word block 31 can be laterally displaced and returned to its original position, so that the next lateral displacement can be realized.

Wherein, as shown in Figure 5, the sidewall of I-shaped block 31 is provided with the 3rd slope 33 opposite to the first slope 42 and the second slope 52 positions, the 3rd slope 33 and the first slope 42 and the second slope 52 Cooperate with each other to facilitate the stable transmission of power in the process of mutual contact. The second guide block 51 cross-section is a square, and includes a straight section above, the top plate 21 and the straight section of the second guide block 51 conflict with each other, the number of the second guide block 51 on each bottom plate 14 is multiple, and then the top plate 21 can Stable up and down displacement.

The secondary ejection process of the product demoulding is as follows: as shown in Figure 3, the movement of the top plate 21 driven by external power to move closer to the mold body 12 will drive the ejector pin 22, the connecting rod 24 and the ejector block 23 to move together. Block 23 together with ejector pin 22 separates most of the area of the product from the cavity, forming the first ejection. After that, the top plate 21 continues to rise. After the I-shaped block 31 contacts the first inclined surface 42, it is driven by the first inclined surface 42 to drive the lateral displacement of the I-shaped block 31. The lateral displacement of the I-shaped block 31 passes through the inclined slot 32. The connecting rod 24 moves closer to the thimble plate 22, so that the connecting rod 24 drives the top block 23 to move downward relative to the ends of other thimble pins 22, so that the top block 23 is separated from the product, and then forms the secondary ejection of the product, as shown in the figure 4.

After the product is ejected, the mold bodies 12 are closed together. When closing, the ejector block 23 is pressed by the mold body 12 to make it snap back into the cavity 13. During this process, the movement of the ejector block 23 synchronizes the working The block 31 pushes the top plate 21 back to its original position, and the I-shaped block 31 returns to its original position laterally along the guidance of the second slope 52 . When the top block 23 is fully engaged in the cavity 13, the I-shaped block 31 pushes the top plate 21 to the lowest point. At this time, there is a gap 15 between the top plate 21 and the bottom plate 14 to prevent the top plate 21 from directly pressing down on the bottom plate 14.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although this paper uses more 11, mold base; 12, mold body; 13, cavity; 14, bottom plate; 15, gap; 21, top plate; 22, thimble; 23, top block; 24, connecting rod; I-shaped block; 32, card slot; 33, the third slope; 41, the first guide block; 42, the first slope; 51, the second guide block; 52, the second slope; The possibility of using other terms is not excluded. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (8)

1. a kind of injection mold ejection device mechanism, including die ontology (12) and can opposing mold ontology (12) movement top plate (21), it is provided with the cavity (13) for being used to form product on the die ontology (12), is provided with and is used on the top plate (21) The thimble (22) of ejecting product, which is characterized in that be movably set with jacking block (23), the die ontology in the cavity (13) (12) it is provided with I-shaped block (31) between top plate (21), skewed card slot (32), institute are provided on the I-shaped block (31) It states and is connected with the connecting rod (24) for being pierced by die ontology (12) on jacking block (23), the end sliding of connecting rod (24) is connected to card slot (32) On, it is provided with the first inclined-plane (42) on the die ontology (12), when top plate (21) is moved toward close to die ontology (12) direction After the distance of one end, the first inclined-plane (42) drive I-shaped block (31) along top plate (21) lateral sliding.

2. injection mold ejection device according to claim 1 mechanism, which is characterized in that solid on the die ontology (12) Surely it is connected with the first guide pad (41), first inclined-plane (42) is located on the first guide pad (41).

3. injection mold ejection device according to claim 1 mechanism, which is characterized in that connect on the die ontology (12) It is connected to bottom plate (14), the top plate (21) moves between die ontology (12) and bottom plate (14), fixed on the bottom plate (14) It is connected with the second guide pad (51) through top plate (21), is provided on second guide pad (51) for driving I-shaped block (31) the second inclined-plane (52) resetted.

4. injection mold ejection device according to claim 3 mechanism, which is characterized in that first inclined-plane (42) and the Two inclined-planes (52) are mutually parallel, when I-shaped block (31) side and the first inclined-plane (42) contact, I-shaped block (31) other side and the Two inclined-planes (52) contact.

5. injection mold ejection device according to claim 3 mechanism, which is characterized in that be all provided on the I-shaped block (31) It is equipped with the third inclined-plane (33) for coordinating with the first inclined-plane (42) and the second inclined-plane (52).

6. injection mold ejection device according to claim 3 mechanism, which is characterized in that on second guide pad (51) The straight line portion (53) being bonded with top plate (21) is set.

7. injection mold ejection device according to claim 1 mechanism, which is characterized in that the card slot (32) is T-slot.

8. injection mold ejection device according to claim 1 mechanism, which is characterized in that when jacking block (23) is fastened on cavity (13) in and when I-shaped block (31) is contradicted with top plate (21), there are gap (15) between top plate (21) and bottom plate (14).