Multi-point glue injection structure of mould core and three-plate mould sleeve beer mould

Abstract

This application provides a multi-point injection structure for a mold core and a three-plate mold die. The multi-point injection structure includes a nozzle, a rear mold core, a front mold core, and a runner clamping plate. The rear mold core is embedded in the rear template and is used to position the outer shell body, so that the outer surface of the outer shell body fits against the rear mold core. The outer shell body has multiple through holes, each of which penetrates the inner and outer surfaces of the outer shell body. The front mold core is embedded in the front template, and multiple injection runners are formed on the back of the front mold core. The runner clamping plate is located between the sprue plate and the front template and is connected to the sprue plate. One end of the runner clamping plate away from the sprue plate penetrates through the front template and abuts against the back of the front mold core. One end of the nozzle is installed through the panel, and the other end of the nozzle passes through the sprue plate and the runner clamping plate in sequence, abutting against the back of the front mold core.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to a multi-point injection structure for the mold core and a three-plate mold die. Background Technology

[0002] Overmolding is a special plastic molding process, also known as secondary injection molding or overmolding. While similar to two-color molding, it has distinct differences. In overmolding, a specific plastic material is first molded into a part using a primary mold. This part is then placed into another mold, where the same or different types of plastic material are injected again for secondary molding. This creates another layer covering or bonding on the surface or specific areas of the part, achieving a two- or multi-layer structure. Overmolding has a wide range of applications, allowing the combination of the advantages of different materials on the same part, improving the product's durability, aesthetics, or functionality.

[0003] like Figure 1 As shown, a commercially available die-casting product for a power drill housing includes a hard plastic part and a soft plastic part. The hard plastic part is the main body 20 of the housing, and the soft plastic part is the anti-slip rubber shell 30. Generally, when designing the die-casting mold structure for the aforementioned power drill housing, the inner surface of the main body 20 after the first injection molding is usually bonded to the rear mold core. Specifically, before the second injection molding, the main body 20 is placed into the rear mold cavity by means of a robotic arm or manual placement, so that the inner surface of the main body 20 is bonded to the rear mold core. Then, the anti-slip rubber shell 30 is injection molded by side injection or direct spot injection.

[0004] However, the above-mentioned mold core structure design and injection method are only applicable when the injection appearance requirements of the anti-slip overmolded shell are relatively low. However, when the injection appearance requirements of the anti-slip overmolded shell are high and the injection appearance area of ​​the anti-slip overmolded shell is large, it is difficult to meet the injection molding quality of the anti-slip overmolded shell if the traditional mold core structure design and injection method are still used, that is, it is easy to have problems such as insufficient glue or obvious glue marks. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a multi-point injection structure for the mold core and a three-plate mold sleeve die that can avoid problems such as insufficient injection or obvious injection marks in the anti-slip rubber shell.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A multi-point injection structure for a mold core includes:

[0008] Smacking lips;

[0009] The rear mold core is embedded in the rear template. The rear mold core is used to position the outer shell body so that the outer surface of the outer shell body fits with the rear mold core. The outer shell body has multiple through holes, and each through hole penetrates the inner and outer surfaces of the outer shell body.

[0010] The front mold core is embedded in the front mold plate, and multiple glue inlet channels are opened on the back of the front mold core;

[0011] A runner clamping plate is located between the sprue plate and the front mold plate. The runner clamping plate is connected to the sprue plate. One end of the runner clamping plate away from the sprue plate passes through the front mold plate and abuts against the back of the front mold core. One end of the nozzle is installed through the panel, and the other end of the nozzle passes through the sprue plate and the runner clamping plate in sequence, abutting against the back of the front mold core. When the mold is closed, the injection channel of the nozzle is connected to the starting end of multiple injection runners. The end of each injection runner is aligned and connected to the corresponding through hole. The front mold core, the front mold core, and the outer shell body together form a secondary molding cavity. Each injection runner is connected to the secondary molding cavity through the corresponding through hole. The secondary molding cavity is used for injection molding of an anti-slip rubber shell.

[0012] In one embodiment, each of the injection channels includes a diversion channel and a dispensing channel; the diversion channel is located on the back end face of the front mold core, and the dispensing channel is perpendicularly connected to the diversion channel. When the mold is closed, the end of the dispensing channel opposite to the diversion channel is aligned and connected to the corresponding through hole.

[0013] In one embodiment, a plurality of sliding limiting grooves are provided on the back end face of the front mold core, and each sliding limiting groove is alternately connected to the corresponding flow distribution groove.

[0014] The multi-point glue injection structure of the mold core also includes multiple regulating valve bodies. Each regulating valve body is slidably disposed in the corresponding sliding limit groove, and each regulating valve body is provided with a flow channel. The cross-sectional shape of the flow channel is the same as the cross-sectional shape of the flow distribution groove. When the regulating valve body slides to a preset position, the flow channel and the flow distribution groove are completely aligned and connected.

[0015] In one embodiment, each of the regulating valve bodies is screwed to the flow channel clamping plate to restrict the sliding of the regulating valve body.

[0016] In one embodiment, the nozzle is a one-piece molded structure.

[0017] In one embodiment, the multi-point injection structure of the mold core further includes a plurality of sprue hooks. One end of each sprue hook is fixed to the panel, and the other end of each sprue hook passes through the sprue plate and the runner pressing plate in sequence to the part where the corresponding dispensing runner is perpendicularly connected to the corresponding flow channel. Each sprue hook is used to pull out the sprue when the mold is opened.

[0018] In one embodiment, both the front mold core and the rear mold core are separate parts.

[0019] A three-plate die set includes a front panel, a sprue plate, a front template, a rear template, two square iron plates, a base plate, and a multi-point glue injection structure for the die core as described in any of the above embodiments.

[0020] Compared with the prior art, the present invention has at least the following advantages:

[0021] 1. When positioning the outer shell body, the rear mold core ensures that the outer surface of the outer shell body fits against the rear mold core. The outer shell body has multiple through holes penetrating its inner and outer surfaces. This invention ensures balanced injection of the anti-slip overmolded shell during injection molding by connecting the ends of multiple injection channels to the secondary molding cavity through corresponding through holes. This allows the injection molten plastic to fully fill the secondary molding cavity, thus avoiding insufficient plastic. Simultaneously, the injection position or injection mark of the anti-slip overmolded shell after injection molding is concealed on the inner surface of the outer shell body, better meeting the surface appearance requirements of the anti-slip overmolded shell.

[0022] 2. A runner clamping plate is added between the sprue plate and the front mold plate, allowing the other end of the nozzle to pass through both the sprue plate and the runner clamping plate, and abut against the back of the front mold core. This allows the nozzle's injection channel to connect with multiple injection runners simultaneously. This effectively shortens the injection distance of the molten plastic from the injection nozzle to the secondary molding cavity, preventing premature cooling of the molten plastic at the injection tip due to an excessively long injection channel. It also ensures that the molten plastic can quickly fill the secondary molding cavity, avoiding insufficient plastic buildup and improving the injection molding quality of the anti-slip overmolded shell. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the core structure of a die-cutting mold in the prior art;

[0025] Figure 2 This is a partial structural schematic diagram of the multi-point injection structure of the mold core in one embodiment;

[0026] Figure 3 for Figure 2 An enlarged view of point A in the multi-point injection structure of the mold core shown;

[0027] Figure 4 for Figure 1 The diagram shows a partial exploded view of the multi-point injection structure of the mold core.

[0028] Figure 5 for Figure 4 An enlarged view of point B in the multi-point injection structure of the mold core shown;

[0029] Figure 6 for Figure 2 The top view of the multi-point injection structure of the mold core is shown.

[0030] Figure 7 for Figure 6 A cross-sectional view of the multi-point injection structure of the mold core shown, with AA section line.

[0031] Figure 8 This is a structural schematic diagram of a three-plate die set.

[0032] Reference numerals: 10 for multi-point injection structure in mold core; 20 for outer shell body; 201 for through hole; 30 for anti-slip rubber shell; 100 for nozzle; 200 for rear mold core; 300 for front mold core; 301 for injection channel; 301a for distribution channel; 301b for dispensing channel; 302 for secondary molding cavity; 303 for sliding limit groove; 400 for channel clamping plate; 500 for regulating valve body; 501 for guiding channel; 600 for sprue hook; 700 for panel; 800 for sprue plate; 900 for front mold plate; 1000 for rear mold plate; 1100 for square iron; 1200 for base plate. Detailed Implementation

[0033] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] 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 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.

[0036] Please see Figures 1 to 8 To better understand the multi-point injection structure 10 of the mold core in this application, the following further explanation of the multi-point injection structure 10 of the mold core is provided:

[0037] One embodiment of the multi-point injection mold core structure 10 includes a nozzle 100, a rear mold core 200, a front mold core 300, and a runner clamping plate 400. The rear mold core 200 is embedded in the rear template 1000 and is used to position the outer shell body 20, so that the outer surface of the outer shell body 20 fits against the rear mold core 200. The outer shell body 20 has multiple through holes 201, each of which penetrates the inner and outer surfaces of the outer shell body 20. The front mold core 300 is embedded in the front template 900, and multiple injection runners 301 are formed on its back. The runner clamping plate 400 is located between the sprue plate 800 and the front template 900, and is connected to the sprue plate 800. One end of the runner clamping plate 400 facing away from the sprue plate 800 penetrates the front template 900 and is connected to the back of the front mold core 300. The nozzle 100 is mounted on the panel 700 at one end and passes through the sprue plate 800 and the runner pressing plate 400 at the other end, and abuts against the back of the front mold core 300. When the mold is closed, the injection channel of the nozzle 100 is connected to the starting end of multiple injection channels 301, and the end of each injection channel 301 is aligned and connected with the corresponding through hole 201. The front mold core 300, the front mold core 300 and the outer shell body 20 together form a secondary molding cavity 302. Each injection channel 301 is connected to the secondary molding cavity 302 through the corresponding through hole 201. The secondary molding cavity 302 is used for injection molding of the anti-slip rubber shell 30.

[0038] In this embodiment, when the rear mold core 200 positions the outer shell body 20, it specifically makes the outer surface of the outer shell body 20 fit with the rear mold core 200. The outer shell body 20 has multiple through holes 201 penetrating the inner and outer surfaces of the outer shell body 20. This utility model can ensure that the injection of the anti-slip overmolded shell 30 is relatively balanced during the injection molding process by connecting the ends of the multiple injection channels 301 to the secondary molding cavity 302 through the corresponding through holes 201, so as to fully fill the secondary molding cavity 302 with the injection molding liquid, thereby avoiding the problem of insufficient glue. At the same time, the injection position or injection mark of the anti-slip overmolded shell 30 after injection molding is hidden on the inner surface of the outer shell body 20, which better meets the injection molding appearance requirements of the anti-slip overmolded shell 30.

[0039] Furthermore, a runner clamping plate 400 is added between the sprue plate 800 and the front mold plate 900, and the other end of the nozzle 100 passes through the sprue plate 800 and the runner clamping plate 400 in sequence, and abuts against the back of the front mold core 300. In this way, the injection channel of the nozzle 100 can be connected to multiple injection channels 301 at the same time. In this way, the injection distance of the injection molten plastic from the injection nozzle of the injection molding machine to the secondary molding cavity 302 can be effectively shortened, so as to avoid the situation that the front end of the injection molten plastic cools down prematurely due to the excessively long injection channel. Even if the molten injection molten plastic can quickly fill the secondary molding cavity 302, the problem of insufficient plastic can be avoided, thereby improving the injection molding quality of the anti-slip overmolded shell 30.

[0040] It should be noted that in this embodiment, the outer shell body 20 is first pre-molded by other injection molds, and then the outer shell body 20 is positioned and placed into the rear mold core 200 by means of a robot or manual placement. After the mold is closed, the secondary molding cavity is then injection molded.

[0041] like Figures 2 to 5 As shown, in one embodiment, each of the glue inlet channels 301 includes a flow channel 301a and a dispensing channel 301b; the flow channel 301a is located on the end face of the back of the front mold core 300, and the dispensing channel 301b is perpendicularly connected to the flow channel 301a. When the mold is closed, the end of the dispensing channel 301b away from the flow channel 301a is aligned and connected with the corresponding through hole 201.

[0042] It is understandable that during mold closing, the end of the runner clamping plate 400 facing away from the sprue plate 800 abuts against the back of the front mold core 300. Since the flow channel 301a is located on the end face of the back of the front mold core 300, the end face of the runner clamping plate 400 facing away from the sprue plate 800 will completely cover the flow channel 301a, so that the injection molding liquid can only flow in the flow channel 301a during the injection process. That is, the injection molding liquid injected by the nozzle of the injection molding machine flows sequentially through the injection channel of the nozzle 100, the flow channel 301a and the dispensing runner 301b, and finally reaches the secondary molding cavity 302.

[0043] like Figure 4 and Figure 5 As shown, in one embodiment, a plurality of sliding limiting grooves 303 are provided on the back end face of the front mold core 300, and each sliding limiting groove 303 is alternately connected with the corresponding flow distribution groove 301a; the mold core multi-point glue injection structure 10 also includes a plurality of adjusting valve bodies 500, each adjusting valve body 500 is slidably disposed in the corresponding sliding limiting groove 303, and each adjusting valve body 500 is provided with a guiding channel 501, the cross-sectional shape of the guiding channel 501 is the same as the cross-sectional shape of the flow distribution groove 301a, and when the adjusting valve body 500 slides to a preset position, the guiding channel 501 is completely aligned and connected with the flow distribution groove 301a.

[0044] It is understood that by adjusting the valve body 500 relative to the sliding limit groove 303, when the valve body 500 slides to the preset position, the guiding channel 501 and the distribution glue groove 301a are completely aligned and connected. Conversely, when the valve body 500 slides to a non-preset position, the guiding channel 501 and the distribution glue groove 301a are in a misaligned connection state, that is, the guiding channel 501 and the distribution glue groove 301a are not completely aligned and connected. At this time, the flow rate of the injection molding liquid through the distribution glue groove 301a is reduced. In this way, the flow rate through each distribution glue groove 301a can be controlled by the valve body 500, thereby controlling the flow rate through each dispensing channel 301b, thus adjusting the flow rate of the injection molding liquid at different injection points, thereby ensuring the uniformity of glue flow in the secondary molding cavity 302 during the glue injection and filling stages, which is beneficial to improving the injection molding quality of the anti-slip overmolded shell 30.

[0045] like Figure 4 and Figure 5 As shown, in one embodiment, each of the regulating valve bodies 500 is screwed to the flow channel clamping plate 400 to restrict the sliding of the regulating valve body 500. Thus, after the regulating valve body 500 has been slidably adjusted relative to the sliding limit groove 303, it is secured in place by tightening screws to ensure the stability of the regulating valve body 500 installation.

[0046] like Figure 7 As shown, in one embodiment, the nozzle 100 is a one-piece molded structure.

[0047] like Figure 5 and Figure 7 As shown, in one embodiment, the multi-point injection structure 10 of the mold core further includes a plurality of sprue hooks 600. One end of each sprue hook 600 is fixed to the panel 700, and the other end of each sprue hook 600 passes through the sprue plate 800 and the runner pressing plate 400 in sequence, to the part where the corresponding dispensing runner 301b and the corresponding diverting glue groove 301a are vertically connected. Each sprue hook 600 is used to pull out the sprue when the mold is opened.

[0048] It is understood that in this embodiment, after the injection molding liquid cools and solidifies in the distribution tank 301a and the dispensing channel 301b, a sprue is obtained, and the sprue covers the other end of the sprue hook 600. In this way, when the mold is opened, the sprue will be hung on the other end of the sprue hook 600, so that the sprue can be pulled out by the sprue hook 600 to achieve demolding.

[0049] Furthermore, the runner clamping plate 400 is locked to the sprue plate 800 by screws. Thus, during the mold opening stage, the sprue plate 800 will drive the runner clamping plate 400 to move away from the front mold core 300, providing demolding space for subsequent sprue demolding.

[0050] It should be noted that in this embodiment, the mold opening action and the mold opening sequence are based on the existing three-plate mold opening action, that is, the three-plate mold opening action is used. The three-plate mold opening action is existing technology and will not be described in detail here.

[0051] like Figure 2 and Figure 7 As shown, in one embodiment, both the front mold core 300 and the rear mold core 200 are separate components. Specifically, in this embodiment, there are two front mold cores 300 and two rear mold cores 200 to facilitate the individual processing of each component.

[0052] Please see Figure 8 This application also provides a three-plate die, comprising a panel 700, a sprue plate 800, a front template 900, a rear template 1000, two square iron plates 1100, a base plate 1200, and a multi-point glue injection structure 10 for the die core as described in any of the above embodiments.

[0053] In this embodiment, when the rear mold core positions the outer shell body, it specifically ensures that the outer surface of the outer shell body fits against the rear mold core. Furthermore, the outer shell body has multiple through holes penetrating its inner and outer surfaces. This invention ensures a more balanced injection process during the injection molding of the anti-slip overmolded shell by connecting the ends of multiple injection channels to the secondary molding cavity through corresponding through holes. This allows the injection molten plastic to fully fill the secondary molding cavity, thus avoiding the problem of insufficient plastic. Simultaneously, the injection position or injection mark of the anti-slip overmolded shell after injection molding is concealed on the inner surface of the outer shell body, better meeting the appearance requirements of the injection-molded anti-slip overmolded shell.

[0054] Furthermore, a runner clamping plate is added between the sprue plate and the front mold plate, allowing the other end of the nozzle to pass through both the sprue plate and the runner clamping plate, and abut against the back of the front mold core. This allows the nozzle's injection channel to connect with multiple injection runners simultaneously. This effectively shortens the injection distance of the molten plastic from the injection molding machine nozzle to the secondary molding cavity, preventing premature cooling of the molten plastic at the injection tip due to an excessively long injection channel. This ensures that the molten plastic can quickly fill the secondary molding cavity, avoiding insufficient plastic buildup and improving the injection molding quality of the anti-slip overmolded shell.

[0055] Compared with the prior art, the present invention has at least the following advantages:

[0056] 1. When positioning the outer shell body, the rear mold core ensures that the outer surface of the outer shell body fits against the rear mold core. The outer shell body has multiple through holes penetrating its inner and outer surfaces. This invention ensures balanced injection of the anti-slip overmolded shell during injection molding by connecting the ends of multiple injection channels to the secondary molding cavity through corresponding through holes. This allows the injection molten plastic to fully fill the secondary molding cavity, thus avoiding insufficient plastic. Simultaneously, the injection position or injection mark of the anti-slip overmolded shell after injection molding is concealed on the inner surface of the outer shell body, better meeting the surface appearance requirements of the anti-slip overmolded shell.

[0057] 2. A runner clamping plate is added between the sprue plate and the front mold plate, allowing the other end of the nozzle to pass through both the sprue plate and the runner clamping plate, and abut against the back of the front mold core. This allows the nozzle's injection channel to connect with multiple injection runners simultaneously. This effectively shortens the injection distance of the molten plastic from the injection nozzle to the secondary molding cavity, preventing premature cooling of the molten plastic at the injection tip due to an excessively long injection channel. It also ensures that the molten plastic can quickly fill the secondary molding cavity, avoiding insufficient plastic buildup and improving the injection molding quality of the anti-slip overmolded shell.

[0058] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A multi-point injection structure for a mold core, characterized in that, include: Smacking lips; The rear mold core is embedded in the rear template. The rear mold core is used to position the outer shell body so that the outer surface of the outer shell body fits with the rear mold core. The outer shell body has multiple through holes, and each through hole penetrates the inner and outer surfaces of the outer shell body. The front mold core is embedded in the front mold plate, and multiple glue inlet channels are opened on the back of the front mold core; A runner clamping plate is located between the sprue plate and the front mold plate. The runner clamping plate is connected to the sprue plate. One end of the runner clamping plate away from the sprue plate passes through the front mold plate and abuts against the back of the front mold core. One end of the nozzle is installed through the panel, and the other end of the nozzle passes through the sprue plate and the runner clamping plate in sequence, abutting against the back of the front mold core. When the mold is closed, the injection channel of the nozzle is connected to the starting end of multiple injection runners. The end of each injection runner is aligned and connected to the corresponding through hole. The front mold core, the front mold core, and the outer shell body together form a secondary molding cavity. Each injection runner is connected to the secondary molding cavity through the corresponding through hole. The secondary molding cavity is used for injection molding of an anti-slip rubber shell.

2. The multi-point injection structure for the mold core according to claim 1, characterized in that, Each of the aforementioned injection channels includes a flow channel and a dispensing channel; the flow channel is located on the back end face of the front mold core, and the dispensing channel is perpendicularly connected to the flow channel. When the mold is closed, the end of the dispensing channel opposite to the flow channel is aligned and connected to the corresponding through hole.

3. The multi-point injection structure for the mold core according to claim 2, characterized in that, The back end face of the front mold core is provided with multiple sliding limiting grooves, and each sliding limiting groove is alternately connected with the corresponding flow distribution groove. The multi-point glue injection structure of the mold core also includes multiple regulating valve bodies. Each regulating valve body is slidably disposed in the corresponding sliding limit groove, and each regulating valve body is provided with a flow channel. The cross-sectional shape of the flow channel is the same as the cross-sectional shape of the flow distribution groove. When the regulating valve body slides to a preset position, the flow channel and the flow distribution groove are completely aligned and connected.

4. The multi-point injection structure for the mold core according to claim 3, characterized in that, Each of the regulating valve bodies is screwed to the flow channel clamping plate to restrict the sliding of the regulating valve body.

5. The multi-point injection structure for the mold core according to claim 1, characterized in that, The nozzle is a one-piece molded structure.

6. The multi-point injection structure for the mold core according to claim 3, characterized in that, The multi-point injection structure of the mold core also includes multiple sprue hooks. One end of each sprue hook is fixed to the panel, and the other end of each sprue hook passes through the sprue plate and the runner pressing plate in sequence, to the part where the corresponding dispensing runner is perpendicularly connected to the corresponding flow channel. Each sprue hook is used to pull out the sprue when the mold is opened.

7. The multi-point injection structure for the mold core according to claim 1, characterized in that, Both the front mold core and the rear mold core are separate parts.

8. A three-plate die set mold, characterized in that, It includes a panel, a sprue plate, a front template, a rear template, two square irons, a base plate, and a multi-point glue injection structure for the mold core as described in any one of claims 1-7.

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