Ejection mechanism and mold with ejection mechanism

Abstract

The utility model provides an ejection mechanism and a mold with the ejection mechanism, and belongs to the technical field of molds. One end of the ejector pin is connected with the push plate, and the other end of the ejector pin is provided with a first connecting part; the nylon head is provided with a second connecting part, and the nylon head is connected with the first connecting part of the ejector pin through the second connecting part. The utility model has the beneficial effects that the nylon head which is softer than the ejector pin is in direct contact with a product, and the nylon head is in plastic-to-plastic contact with the product in a local embedding manner, so that a hard rubber product placed in secondary injection molding can be protected, the risk that the plastic is shoveled by a steel material is avoided, and the service life of the product is prolonged. And meanwhile, machining and assembling can be achieved only through simple lathe machining by a bench worker, and simplicity and convenience are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology, and relates to an ejection mechanism and a mold with an ejection mechanism. Background Technology

[0002] Injection molds are used in the injection molding process to solidify molten plastic into specific sizes and shapes. In the production of overmolded plastic products, the ejector components in the mold directly affect the appearance and defect rate of the finished product.

[0003] In traditional molds, the ejector pins of the ejector assembly typically come into direct contact with the product through a hard metal head. This fails to protect the hard plastic product that is placed inside for secondary injection molding. Due to excessive ejection pressure, the ejector pins can easily damage the product, posing a risk of steel scraping the plastic. This severely affects the product's appearance and defect rate, indicating significant room for improvement. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing an ejection mechanism and a mold with an ejection mechanism.

[0005] The objective of this utility model can be achieved through the following technical solution: a push-out mechanism, comprising:

[0006] Push plate;

[0007] A ejector pin, one end of which is connected to the push plate, and the other end of the ejector pin is provided with a first connecting part;

[0008] The nylon head is provided with a second connecting part, and the nylon head is connected to the first connecting part of the ejector pin through the second connecting part.

[0009] In one of the ejection mechanisms described above, the nylon head is detachably connected to the first connecting portion of the ejector pin via the second connecting portion.

[0010] In one of the ejection mechanisms described above, the first connecting part is a positioning protrusion, and the second connecting part is a positioning recess whose shape is adapted to the shape of the positioning protrusion, and the positioning protrusion is inserted into the positioning recess.

[0011] In one of the ejection mechanisms described above, the second connecting part is disposed at one end of the nylon head, and the other end of the nylon head is provided with a pushing surface.

[0012] In one of the ejection mechanisms described above, a limiting head is provided at one end of the ejector pin near the push plate. The push plate includes a base plate and a limiting plate. The base plate is connected to the limiting plate, and a limiting space is formed between the two. The limiting head is located in the limiting space, and the ejector pin passes through the limiting plate.

[0013] In one of the ejection mechanisms described above, the limiting plate is provided with a limiting groove, the limiting space is formed in the limiting groove, and the limiting head is located in the limiting groove.

[0014] In one of the ejection mechanisms described above, the limiting head is provided with a first anti-rotation surface, and the limiting groove is provided with a second anti-rotation surface. The first anti-rotation surface can contact the second anti-rotation surface, thereby restricting the rotation of the limiting head relative to the limiting groove.

[0015] In one of the ejection mechanisms described above, the positioning protrusion and the positioning recess are bonded together.

[0016] A mold with an ejection mechanism is also provided, including the ejection mechanism, and further comprising:

[0017] A template is provided, which includes a first mold core;

[0018] A movable template that can move closer to or further away from the fixed template, the movable template being provided with a second mold core, a cavity being formed between the first mold core and the second mold core, the nylon head passing through the movable template and inserted into the second mold core.

[0019] In the aforementioned mold with an ejection mechanism, an elastic element is also included. The elastic element is disposed between the moving template and the push plate, and both ends of the elastic element are connected to the moving template and the push plate, respectively.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] 1. The nylon tap, which is softer than the thimble, makes direct contact with the product. Through partial inlay, the contact between the nylon tap and the product is plastic-to-plastic, which can protect the hard plastic product that is placed inside for secondary injection molding. There is no risk of steel scraping the plastic. At the same time, it can be processed and assembled by a fitter using a simple lathe, which is simple and convenient.

[0022] 2. The first connecting part is a positioning protrusion and the second connecting part is a positioning recess whose shape matches the shape of the positioning protrusion. Therefore, the connection between the nylon head and the ejector pin can be achieved by inserting the positioning protrusion into the positioning recess. At the same time, the nylon head can be repaired and replaced according to the actual processing conditions.

[0023] 3. The push surface at the end of the nylon tap furthest from the second connection part is adapted to the product surface to increase the contact area with the product surface, reduce the pressure between the two, and avoid scratches or other damage to the product surface. Attached Figure Description

[0024] Figure 1 This is an exploded view of the ejection mechanism of this utility model.

[0025] Figure 2 This is an exploded view of the ejection mechanism of this utility model from another perspective.

[0026] Figure 3 This is an exploded view of the ejector pin and nylon head of this utility model.

[0027] Figure 4 This is an exploded view of the ejector pin and nylon head of this utility model from another perspective.

[0028] Figure 5 This is a schematic diagram of the internal structure of the mold with an ejection mechanism according to this utility model.

[0029] In the figure, 100 is the substrate; 200 is the limiting plate; 210 is the limiting groove; 211 is the second anti-rotation surface; 300 is the ejector pin; 310 is the positioning protrusion; 320 is the limiting head; 321 is the first anti-rotation surface; 400 is the nylon head; 410 is the positioning recess; 420 is the push surface; 500 is the fixed template; 510 is the first mold core; 600 is the moving template; 610 is the second mold core; and 700 is the elastic element. Detailed Implementation

[0030] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0036] like Figures 1-4 As shown, an ejection mechanism includes: a push plate, an ejector pin 300, and a nylon head 400.

[0037] The push plate is used to install one or more other components and serves to fix them in place.

[0038] Specifically, the ejector plate is one of the components in a plastic mold used to push the molded plastic product out of the mold, and its main function is to fix it in place.

[0039] One end of the ejector pin 300 is connected to the push plate, and the other end of the ejector pin 300 is provided with a first connecting part.

[0040] Specifically, the ejector pin 300 is an alloy or metal part.

[0041] Specifically, the ejector plate is one of the components in a plastic mold used to push the molded plastic product out of the mold, mainly serving the function of ejecting the material.

[0042] The nylon head 400 is provided with a second connecting part, and the nylon head 400 is connected to the first connecting part of the ejector pin 300 through the second connecting part.

[0043] Specifically, the structure of the first connecting part and the second connecting part is not specifically limited. It can be a locking block or a locking groove, and the first connecting part and the second connecting part can be locked together; or it can be a tenon and a mortise, and the tenon and the mortise can be connected by tenon and mortise; or it can be two connecting holes, which are connected by fasteners to achieve a detachable connection between the first connecting part and the second connecting part.

[0044] Alternatively, the first connecting part and the second connecting part can be two surfaces that need to be fixedly connected by welding, bonding or other methods, so as to achieve a fixed connection between the first connecting part and the second connecting part.

[0045] In the existing technology, the ejector pin 300 of the ejector assembly in traditional molds generally comes into direct contact with the product through a hard metal head, which cannot protect the hard plastic product placed inside for secondary injection molding. Due to the excessive ejection pressure, the ejector pin 300 is prone to damaging the product, which poses a risk of steel scraping plastic, seriously affecting the appearance of the product and the defect rate.

[0046] In this embodiment, the nylon tap 400, which is softer than the ejector pin 300, comes into direct contact with the product. Through partial inlay, the contact between the nylon tap 400 and the product is plastic-to-plastic, which can protect the hard plastic product that is placed inside for secondary injection molding and avoid the risk of steel scraping the plastic. At the same time, it can be processed and assembled by a fitter using a simple lathe, which is simple and convenient.

[0047] like Figures 1-4 As shown, based on the above embodiment, the nylon head 400 is detachably connected to the first connecting part of the ejector pin 300 via the second connecting part.

[0048] In this embodiment, the structure of the first connecting part and the second connecting part is not specifically limited. It can be a locking block or a locking groove, and the first connecting part and the second connecting part can be locked together; or it can be a tenon and a mortise, and the tenon and the mortise can be mortised and tenoned together; or it can be two connecting holes, which are connected by fasteners to realize the detachable connection between the first connecting part and the second connecting part.

[0049] like Figures 1-4 As shown, based on the above embodiment, the first connecting part is a positioning protrusion 310, and the second connecting part is a positioning recess 410 whose shape is adapted to the shape of the positioning protrusion 310, and the positioning protrusion 310 is inserted into the positioning recess 410.

[0050] In this embodiment, the first connecting part is a positioning protrusion 310 and the second connecting part is a positioning recess 410 whose shape matches the shape of the positioning protrusion 310. Therefore, the connection between the nylon tap 400 and the ejector pin 300 can be achieved by inserting the positioning protrusion 310 into the positioning recess 410. At the same time, the nylon tap 400 can be repaired and replaced according to the actual processing conditions.

[0051] like Figures 1-4 As shown, based on the above embodiment, the second connecting part is provided at one end of the nylon head 400, and the other end of the nylon head 400 is provided with a pushing surface 420.

[0052] In this embodiment, the push surface 420 provided at the end of the nylon head 400 away from the second connecting part is adapted to the product surface, thereby increasing the contact area with the product surface, reducing the pressure between the two, and avoiding scratches or other damage to the product surface.

[0053] like Figures 1-4 As shown, based on the above embodiment, the ejector pin 300 is provided with a limiting head 320 at one end near the push plate. The push plate includes a base plate 100 and a limiting plate 200. The base plate 100 is connected to the limiting plate 200 and a limiting space is formed between them. The limiting head 320 is located in the limiting space, and the ejector pin 300 passes through the limiting plate 200.

[0054] In this embodiment, the substrate 100 is connected to the limiting plate 200 and a limiting space is formed between them, thereby limiting the limiting head 320 between the substrate 100 and the limiting plate 200, preventing the ejector pin 300 from coming off the push plate without the need to install other connecting parts on the ejector pin 300.

[0055] like Figures 1-4 As shown, based on the above embodiment, the limiting plate 200 is provided with a limiting groove 210, the limiting space is formed in the limiting groove 210, and the limiting head 320 is located in the limiting groove 210.

[0056] In this embodiment, the limiting space is formed in the limiting groove 210 provided in the limiting plate 200, so there is no need to cut a groove in the substrate 100. The limiting groove 210 thereby restricts the limiting head 320 between the substrate 100 and the limiting plate 200, preventing the ejector pin 300 from coming off the push plate without installing other connecting parts on the ejector pin 300.

[0057] like Figures 1-4 As shown, based on the above embodiment, the limiting head 320 is provided with a first anti-rotation surface 321, and the limiting groove 210 is provided with a second anti-rotation surface 211. The first anti-rotation surface 321 can contact the second anti-rotation surface 211, thereby restricting the limiting head 320 from rotating relative to the limiting groove 210.

[0058] In this embodiment, the first anti-rotation surface 321 of the limiting head 320 can contact the second anti-rotation surface 211 of the limiting groove 210, so that when the ejector pin 300 is subjected to force directly or indirectly, the limiting head 320 is restricted from rotating relative to the limiting groove 210.

[0059] like Figures 1-4 As shown, based on the above embodiment, the positioning protrusion 310 and the positioning recess 410 are bonded together.

[0060] In this embodiment, the connection between the positioning protrusion 310 and the positioning recess 410 is made more secure by adhesive bonding.

[0061] In addition, in the actual production process, the following steps can be taken: First, find a pin 300 with a diameter of 6mm or more and a nylon head 400 with the same diameter as the pin 300. Then, use a lathe to machine the first connecting part and the second connecting part respectively. Finally, match the machined pin 300 and nylon head 400 together.

[0062] like Figures 1-5 As shown, a mold with an ejection mechanism includes the ejection mechanism and further includes:

[0063] The template 500 is provided with a first mold core 510;

[0064] Specifically, the fixed mold plate 500 is the part of the mold connected to the stationary part of the injection molding machine. It usually includes structures such as a gating system. The gating system includes the main runner, branch runners, and gates, which are responsible for guiding the molten plastic into each cavity.

[0065] The movable template 600 can be close to or away from the fixed template 500. The movable template 600 is provided with a second mold core 610. A cavity is formed between the first mold core 510 and the second mold core 610. The nylon head 400 passes through the movable template 600 and is inserted into the second mold core 610.

[0066] Specifically, the moving mold plate 600 is the part of the mold connected to the moving part of the injection molding machine, which is responsible for demolding from the plastic part when the mold is opened.

[0067] like Figures 1-5 As shown, based on the above embodiment, it also includes an elastic element 700, which is disposed between the moving template 600 and the push plate, and the two ends of the elastic element 700 are respectively connected to the moving template 600 and the push plate.

[0068] In this embodiment, the two ends of the elastic member 700 are connected to the moving template 600 and the push plate, respectively, so the push plate can be driven to approach the moving template 600 to push the product out of the second mold core 610.

Claims

1. An ejection mechanism, characterized in that, include: Push plate; A ejector pin, one end of which is connected to the push plate, and the other end of the ejector pin is provided with a first connecting part; The nylon head is provided with a second connecting part, and the nylon head is connected to the first connecting part of the ejector pin through the second connecting part.

2. The ejection mechanism as described in claim 1, characterized in that: The nylon head is detachably connected to the first connecting part of the ejector pin via the second connecting part.

3. The ejection mechanism as described in claim 2, characterized in that: The first connecting part is a positioning protrusion, and the second connecting part is a positioning recess whose shape is adapted to the shape of the positioning protrusion, and the positioning protrusion is inserted into the positioning recess.

4. The ejection mechanism as described in claim 1, characterized in that: The second connecting part is provided at one end of the nylon head, and the other end of the nylon head is provided with a pushing surface.

5. The ejection mechanism as described in claim 1, characterized in that: The ejector pin is provided with a limiting head at one end near the push plate. The push plate includes a base plate and a limiting plate. The base plate is connected to the limiting plate and a limiting space is formed between them. The limiting head is located in the limiting space, and the ejector pin passes through the limiting plate.

6. The ejection mechanism as described in claim 5, characterized in that: The limiting plate is provided with a limiting groove, the limiting space is formed in the limiting groove, and the limiting head is located in the limiting groove.

7. The ejection mechanism as described in claim 6, characterized in that: The limiting head is provided with a first anti-rotation surface, and the limiting groove is provided with a second anti-rotation surface. The first anti-rotation surface can contact the second anti-rotation surface, thereby restricting the rotation of the limiting head relative to the limiting groove.

8. The ejection mechanism as described in claim 3, characterized in that: The positioning protrusion and the positioning recess are bonded together.

9. A mold with an ejection mechanism, characterized in that, Including the ejection mechanism as described in any one of claims 1-8, further comprising: A template is provided, which includes a first mold core; A movable template that can move closer to or further away from the fixed template, the movable template being provided with a second mold core, a cavity being formed between the first mold core and the second mold core, the nylon head passing through the movable template and inserted into the second mold core.

10. A mold with an ejection mechanism as described in claim 9, characterized in that: It also includes an elastic element, which is disposed between the moving template and the push plate, and the two ends of the elastic element are respectively connected to the moving template and the push plate.

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