Ejection mechanism and mold

Abstract

The application discloses a ejection mechanism and a mold, and relates to the technical field of injection molding. The ejection mechanism is used for ejecting products processed and formed by the mold. The ejection mechanism comprises a base, a grafting rod and a ejector rod. The base is connected to a driving plate of the mold. One end of the grafting rod is connected to the base, and the other end is connected to an end of the ejector rod. An end of the ejector rod away from the grafting rod is used for ejecting the products. The extension direction of the grafting rod is parallel to the extension direction of the ejector rod. The application solves the technical problem that the existing ejector rod is not easy to process due to the slender shape and is prone to deformation and fracture during use.

Description

Technical Field

[0001] This invention relates to the technical field of injection molding, and more particularly to an ejection mechanism and a mold. Background Technology

[0002] After the product is injection molded, an ejection mechanism is needed to eject it. Existing ejection mechanisms can generally be divided into two types: straight ejection and angled ejection. As the size of the mold increases, the ejector pins in the ejection mechanism need to be longer. However, slender ejector pins are prone to deformation during processing and are susceptible to deformation and breakage during long-term use. Summary of the Invention

[0003] In view of this, the present invention provides an ejection mechanism and a mold to solve the technical problem that existing ejector rods are difficult to process due to their slender shape and are prone to deformation and breakage during use.

[0004] To solve the above-mentioned technical problems, the first technical solution adopted by the present invention is as follows:

[0005] An ejection mechanism is provided for ejecting a product formed by a mold. The ejection mechanism includes a base, a grafting rod, and a ejector rod. The base is connected to the drive plate of the mold. One end of the grafting rod is connected to the base, and the other end is connected to the end of the ejector rod. The end of the ejector rod away from the grafting rod ejects the product. The extension direction of the grafting rod is parallel to the extension direction of the ejector rod.

[0006] In some embodiments of the ejection mechanism, one of the grafting rod and the ejector rod is provided with a protrusion, and the other is provided with a snap-fit ​​hole that matches the protrusion. The grafting rod and the ejector rod can be snapped together through the protrusion and the snap-fit ​​hole.

[0007] In some embodiments of the ejection mechanism, the protrusion and the snap-fit ​​hole are respectively disposed at two opposite ends of the grafting rod and the ejector rod.

[0008] In some embodiments of the ejection mechanism, the contact surface between the protrusion and the locking hole is an arc-shaped surface.

[0009] In some embodiments of the ejection mechanism, the ejection mechanism further includes a support sleeve, which is tightly fitted at the connection between the grafting rod and the ejector rod. The support sleeve is used to fasten the connection and support the ejector rod.

[0010] In some embodiments of the ejection mechanism, the ejection mechanism further includes a guide assembly, which includes a first guide member and a second guide member. The first guide member and the second guide member are both sleeved on the grafting rod and can be fixedly connected to the mold. The first guide member and the second guide member are both used to guide the movement of the grafting rod. The guiding direction of the first guide member and the second guide member is parallel to the extension direction of the ejector rod.

[0011] In some embodiments of the ejection mechanism, the guiding assembly further includes a third guide member, which is sleeved on the ejector rod and can be fixedly connected to the mold. The third guide member is used to guide the movement of the ejector rod, and the guiding direction of the third guide member is parallel to the extension direction of the ejector rod.

[0012] In some embodiments of the ejection mechanism, the second guide and the third guide respectively abut against both ends of the support sleeve.

[0013] To solve the above-mentioned technical problems, the second technical solution adopted by the present invention is as follows:

[0014] A mold includes the ejection mechanism described in the above embodiment. The mold includes a main body and a drive plate. The base is mounted on the drive plate, and the drive plate is used to drive the ejection mechanism to eject the product.

[0015] In some embodiments of the mold, the driving direction of the drive plate is set at an angle to the ejection direction of the ejection mechanism.

[0016] Implementing the embodiments of the present invention will have at least the following beneficial effects:

[0017] The aforementioned ejection mechanism, when applied to a mold, enables both the ejector pin and the mold to be less prone to deformation and breakage. Specifically, by incorporating a grafting rod, this invention avoids making the ejector pin excessively slender, thus eliminating the need to manufacture it in a long and thin shape. This facilitates the production and processing of the ejector pin and prevents deformation during manufacturing due to its slenderness, thereby improving the yield rate of the ejector pin. Furthermore, since the extension direction of the grafting rod is parallel to the extension direction of the ejector pin, instability is less likely to occur during the ejection process, ensuring stable driving of the ejector pin to eject the product. This solves the technical problem that existing ejector pins are difficult to process due to their slender shape and are prone to deformation and breakage during use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the ejection mechanism in one embodiment;

[0020] Figure 2 This is a schematic diagram of the connection structure between the grafting rod and the top rod in one embodiment;

[0021] Figure 3 This is a schematic diagram of a portion of the mold structure in one embodiment.

[0022] The components are as follows: 1. Base; 2. Grafting rod; 3. Top rod; 4. Support sleeve; 5. Guide assembly; 51. First guide component; 52. Second guide component; 53. Third guide component; 6. Protrusion; 7. Snap-fit ​​hole; 100. Main body; 101. Lower template; 102. Mold core; 200. Drive plate. Detailed Implementation

[0023] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many other different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0024] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] As the size of the mold increases, the ejector pins in the ejection mechanism need to be longer. However, slender ejector pins are prone to deformation during processing and are susceptible to deformation and breakage during long-term use.

[0027] The following is combined with Figure 1-3 As shown, the ejection mechanism and mold involved in this invention will be further described in detail.

[0028] In one embodiment of the ejection mechanism, the ejection mechanism is used to eject the product formed by the mold. The ejection mechanism includes a base 1, a grafting rod 2, and a push rod 3. The base 1 is connected to the drive plate 200 of the mold. One end of the grafting rod 2 is connected to the base 1, and the other end is connected to the end of the push rod 3. The end of the push rod 3 away from the grafting rod 2 ejects the product. The extension direction of the grafting rod 2 is parallel to the extension direction of the push rod 3.

[0029] In this embodiment, by setting the grafting rod 2, the ejector rod 3 can be prevented from being too slender, thus avoiding the need to manufacture the ejector rod 3 into a slender shape. This facilitates the production and processing of the ejector rod 3 and prevents deformation of the ejector rod 3 during manufacturing due to its slenderness, thereby improving the yield rate of the ejector rod 3. In addition, the extension direction of the grafting rod 2 is parallel to the extension direction of the ejector rod 3, which makes it less prone to instability during the ejection of the product, and can stably drive the ejector rod 3 to eject the product. This solves the technical problem that the existing ejector rod 3 is difficult to process due to its slender shape and is prone to deformation and breakage during use.

[0030] In one embodiment of the ejection mechanism, one of the grafting rod 2 and the ejector rod 3 is provided with a protrusion 6, and the other is provided with a snap-fit ​​hole 7 that matches the protrusion 6. The grafting rod 2 and the ejector rod 3 can be snapped together through the protrusion 6 and the snap-fit ​​hole 7.

[0031] In this embodiment, the protrusion 6 and the snap-fit ​​hole 7 can be various matching shapes and structures, such as T-shaped block and T-shaped groove, axial shape of more than a semi-circle and matching hole or tenon structure, etc. It should be noted that the protrusion 6 and the snap-fit ​​hole 7 can be snapped together. By setting the snap-fit ​​method, it is easy to install and disassemble, thereby facilitating the connection of the grafting rod 2 and the top rod 3 together.

[0032] In one embodiment of the ejection mechanism, the protrusion 6 and the snap-fit ​​hole 7 are respectively disposed at the two opposite ends of the grafting rod 2 and the ejector rod 3.

[0033] In this embodiment, specifically, the protrusion 6 can be provided on the end face of the grafting rod 2 relative to the top rod 3, and the snap-fit ​​hole 7 can be provided on the end face of the top rod 3 relative to the grafting rod 2. Both the grafting rod 2 and the top rod 3 are long rod-shaped structures. By being respectively provided on the two opposite ends, the grafting rod 2 and the top rod 3 can be connected into a rod, thereby avoiding deformation and breakage due to uneven force during use.

[0034] In one embodiment of the ejection mechanism, the contact surface where the protrusion 6 abuts against the snap-fit ​​hole 7 is an arc-shaped surface.

[0035] In this embodiment, by setting it to an arc-shaped surface, the force-bearing area can be increased, which can further improve the uniformity of force on the top rod 3 and reduce the pressure per unit area, thereby avoiding deformation and breakage.

[0036] In one embodiment of the ejection mechanism, the ejection mechanism further includes a support sleeve 4, which is tightly fitted at the connection between the grafting rod 2 and the ejector rod 3. The support sleeve 4 is used to fasten the connection and support the ejector rod 3.

[0037] In this embodiment, the support sleeve 4 can be a ring-shaped structure. As mentioned in the previous embodiment, although the grafting rod 2 is used for connection, the combination of the grafting rod 2 and the top rod 3 can still form a slender rod. In this embodiment, by setting the support sleeve 4, it can be fitted onto the connection between the grafting rod 2 and the top rod 3, thereby providing a certain support force to the top rod 3. Especially when the grafting rod 2 and the top rod 3 are used as an inclined top, the top rod 3 has a certain angle with the vertical direction. By setting the support sleeve 4, it can withstand part of the downward pressure of the top rod 3, thereby relieving the pressure between the grafting rod 2 and the top rod 3 connection, i.e., the protrusion 6 and the snap hole 7 in the previous embodiment, and avoiding connection failure. At the same time, by wrapping the connection, the connection can be made tighter, and the extension direction of the top rod 3 can be prevented from being misaligned with the extension direction of the grafting rod 2.

[0038] In one embodiment of the ejection mechanism, the ejection mechanism further includes a guide assembly 5, which includes a first guide member 51 and a second guide member 52. The first guide member 51 and the second guide member 52 are both sleeved on the grafting rod 2 and can be fixedly connected to the mold. The first guide member 51 and the second guide member 52 are both used to guide the movement of the grafting rod 2. The guiding directions of the first guide member 51 and the second guide member 52 are both parallel to the extension direction of the ejector rod 3.

[0039] In this embodiment, specifically, the first guide member 51 can be an annular tube structure, and the inner wall of the first guide member 51 matches the shape of the outer wall of the grafting rod 2, thereby guiding the movement of the grafting rod 2. The second guide member 52 can be a block structure, that is, the second guide member 52 can be set as a wear-resistant block. By opening through holes in the wear-resistant block, the movement of the grafting rod 2 can be guided. The wear-resistant block is fixedly connected to the mold. By setting the guide assembly 5, the movement of the grafting rod 2 can be guided, and misalignment can be avoided.

[0040] In one embodiment of the ejection mechanism, the guide assembly 5 further includes a third guide member 53, which is sleeved on the ejector rod 3 and can be fixedly connected to the mold. The third guide member 53 is used to guide the movement of the ejector rod 3, and the guiding direction of the third guide member 53 is parallel to the extension direction of the ejector rod 3.

[0041] In this embodiment, the third guide member 53 can be an annular tube structure. Similarly, the inner wall of the third guide member 53 matches the shape of the outer wall of the top rod 3, so as to guide the movement of the top rod 3. By setting the third guide member 53 in conjunction with the first guide member 51 and the second guide member 52, the movement directions of the grafting rod 2 and the top rod 3 can be guided respectively. Moreover, the guiding directions of the first guide member 51 and the third guide member 53 are the same, which can further prevent misalignment between the top rod 3 and the grafting rod 2.

[0042] In one embodiment of the ejection mechanism, the second guide 52 and the third guide 53 abut against the two ends of the support sleeve 4, respectively.

[0043] In this embodiment, it can be understood that the second guide member 52 and the third guide member 53 are fixedly connected to the mold. Specifically, they can both be fixedly connected to the mold core 102. In this way, by abutting the second guide member 52 and the third guide member 53 against the two ends of the support sleeve 4 respectively, the support sleeve 4 can be fixedly clamped, thereby achieving the effect of fixing the support sleeve 4.

[0044] Preferably, the second guide member 52 and the third guide member 53 are provided with limit blocks or limit grooves on their end faces relative to the support sleeve 4, and correspondingly, the two end faces of the support sleeve 4 are provided with limit grooves or limit blocks. By providing limit blocks and limit grooves, relative rotation between the support sleeve 4, the second guide member 52 and the third guide member 53 can be avoided.

[0045] The present invention also relates to a mold, including the ejection mechanism in the above embodiment. The mold includes a main body 100 and a drive plate 200. The base 1 is mounted on the drive plate 200, and the drive plate 200 is used to drive the ejection mechanism to eject the product.

[0046] In this embodiment, by applying the ejection mechanism described in the previous embodiment, the service life of the ejector rod 3 can be improved. It is understood that the drive plate 200 can be linearly moved by a cylinder. The driving direction of the drive plate 200 is set at an angle to the ejection direction of the ejection mechanism. Specifically, the drive plate 200 can move vertically upward under the drive of the cylinder, and the ejection direction of the ejection mechanism is at an angle to the vertical direction, i.e., the ejection method of the ejection mechanism is an angled ejection. By setting it to an angled ejection form, it is convenient to eject products with undercuts. It is also understood that the guiding direction of the guide component 5, the extension direction of the grafting rod 2, and the extension direction of the ejector rod 3 are all set along the ejection direction.

[0047] Specifically, the main body 100 includes a lower template 101 and a mold core 102. The wear-resistant block is fixedly installed on the lower template 101, and the guide component 5 is installed on the mold core 102. The main body 100 may also include an insert, and the push rod 3 passes through the insert. The movement direction of the push rod 3 can be further guided by the cooperation of the insert and the third guide component 53.

[0048] Preferably, the grafting rod 2 is rotatably connected to the base 1 so that the ejection direction can be easily adjusted, and it can be fixed by fasteners such as screws and bolts after rotation.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. An ejection mechanism, characterized in that, The ejection mechanism is used to eject the product formed by the mold. The ejection mechanism includes a base, a grafting rod, and a push rod. The base is connected to the drive plate of the mold. One end of the grafting rod is connected to the base, and the other end is connected to the end of the push rod. The end of the push rod away from the grafting rod ejects the product. The extension direction of the grafting rod is parallel to the extension direction of the push rod. The ejection mechanism also includes a support sleeve, which is tightly fitted at the connection between the grafting rod and the ejector rod. The support sleeve is used to fasten the connection and support the ejector rod. The ejection mechanism further includes a guide assembly, which includes a first guide and a second guide. Both the first guide and the second guide are sleeved on the grafting rod and can be fixedly connected to the mold. Both the first guide and the second guide are used to guide the movement of the grafting rod. The guiding directions of the first guide and the second guide are parallel to the extension direction of the ejector rod. The guiding assembly further includes a third guiding member, which is sleeved on the push rod and can be fixedly connected to the mold. The third guiding member is used to guide the movement of the push rod, and the guiding direction of the third guiding member is parallel to the extension direction of the push rod. The second guide and the third guide respectively abut against both ends of the support sleeve.

2. The ejection mechanism as described in claim 1, characterized in that, One of the grafting rod and the top rod is provided with a protrusion, and the other is provided with a snap-fit ​​hole that matches the protrusion. The grafting rod and the top rod can be snapped together through the protrusion and the snap-fit ​​hole.

3. The ejection mechanism as described in claim 2, characterized in that, The protrusion and the snap-fit ​​hole are respectively located at the two opposite ends of the grafting rod and the top rod.

4. The ejection mechanism as described in claim 2 or 3, characterized in that, The contact surface where the protrusion abuts against the snap-fit ​​hole is an arc-shaped surface.

5. A mold, characterized in that, The mold includes an ejection mechanism as described in any one of claims 1-4, wherein the mold comprises a body and a drive plate, the base is mounted on the drive plate, and the drive plate is used to drive the ejection mechanism to eject the product.

6. The mold as described in claim 5, characterized in that, The driving direction of the drive plate is set at an angle to the ejection direction of the ejection mechanism.

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