Mould glue feeding structure and injection molding equipment

Abstract

The utility model discloses a mold glue feeding structure and injection molding equipment, and relates to the technical field of injection molding equipment. A mold cavity is formed after the lower mold base, the upper mold base and the lower mold base are closed, the lower mold base is provided with a plurality of glue injection runners, the mold cavity is used for forming an injection product, each glue injection runner is provided with a bent section, and a glue injection opening of each glue injection runner extends into the mold cavity and is used for forming a cavity wall on the inner side of the injection product. According to the mold glue feeding structure, the glue injection port of the glue injection runner is arranged to be aligned to the cavity wall, used for forming the inner side of the injection product, in the mold cavity, the glue injection liquid is prevented from directly impacting the edge or the outer surface of the injection product in the forming process, and the glue injection stress of the injection product is effectively reduced; and product scrapping caused by glue injection air marks formed on the decorative surface or the edge of the injection product is avoided. In addition, the glue injection runner is optimized, and a bending section is additionally arranged to form glue injection buffering, so that the impact of high-pressure glue injection liquid in the glue injection runner on the mold cavity is reduced, and the molding quality of an injection product is improved.

Description

Technical Field

[0001] The present application relates to the technical field of injection molding equipment, and in particular to a mold glue feeding structure and injection molding equipment. Background Art

[0002] Some automotive decorative parts are manufactured through injection molding. Injection-molded products have high requirements for surface quality; defects such as scratches, bumps, and air holes are not acceptable. Existing mold injection structures inject high-pressure molding fluid into the mold cavity during molding. However, improper injection port placement can easily lead to injection marks on the decorative surface of the molded product, resulting in product rejection. Utility Model Content

[0003] The present application aims to solve one of the above-mentioned technical problems in the prior art. To this end, an embodiment of the present application provides a mold glue feeding structure.

[0004] An embodiment of the present application also provides an injection molding device.

[0005] According to an embodiment of the first aspect of the present application, a mold glue feeding structure is provided, including an upper mold base; a lower mold base, wherein the upper mold base and the lower mold base are combined to form a mold cavity, and the lower mold base is provided with a plurality of glue injection channels, the mold cavity is used for molding injection molded products, and the glue injection channels are used to guide the glue injection liquid into the mold cavity, the glue injection channels have a bending section, and the glue injection port of the glue injection channel extends to the cavity wall inside the mold cavity for molding the injection molded product.

[0006] The above-mentioned mold glue feeding structure has at least the following beneficial effects: This application optimizes the glue feeding structure of the mold used for injection molding, and sets the glue injection port of the glue injection channel to align with the cavity wall inside the mold cavity used to form the injection molded product. This prevents the glue injection liquid from directly impacting the edge or outer surface of the injection molded product during the final molding process, effectively reducing the occurrence of injection stress of the injection molded product, thereby avoiding the formation of injection marks on the decorative surface or edge of the injection molded product during the injection molding process, which leads to the scrapping of the product. In addition, this application also optimizes the glue injection channel by adding a bending section to form a glue injection buffer to reduce the impact of high-pressure glue injection liquid in the glue injection channel on the mold cavity, reduce the possibility of glue overflow or leakage, and improve the quality of injection molding of the injection molded product.

[0007] According to the mold glue feeding structure described in the embodiment of the first aspect of the present application, the bending section is close to the glue injection port of the glue injection channel.

[0008] According to the mold glue feeding structure described in the embodiment of the first aspect of the present application, the bending section is U-shaped or concave.

[0009] According to the mold glue feeding structure described in the embodiment of the first aspect of the present application, the lower mold base includes a tilted ejector, part of the glue injection channel is arranged on the tilted ejector, the glue injection port of the glue injection channel is arranged on the tilted ejector, the tilted ejector is used for demolding the formed injection molded product, and the tilted ejector is a part of the cavity wall constituting the mold cavity.

[0010] According to the mold glue feeding structure described in the embodiment of the first aspect of the present application, the lower mold base also includes a cooling channel, and part of the cooling channel passes through the inclined ejector.

[0011] According to the mold glue feeding structure described in the embodiment of the first aspect of the present application, the lower mold base also includes two push rods, the push rods are connected to the inclined push piece, and the push rods are used to drive the inclined push piece to perform telescopic movements. The inlet section of the cooling channel is arranged on one of the push rods, and the outlet section of the cooling channel is arranged on the other push rod.

[0012] According to the mold glue feeding structure described in the embodiment of the first aspect of the present application, the ejector pin is provided with a channel, which runs from one end of the ejector pin to the other end to form an inlet section or an outlet section of the cooling channel.

[0013] According to the mold glue feeding structure described in the embodiment of the first aspect of the present application, the lower mold base also includes a slider, and the slider is used to adjust the size of the bending section.

[0014] According to the mold glue feeding structure described in the embodiment of the first aspect of the present application, a recess is provided on a side of the lower mold base facing the upper mold base, the bending section passes through the recess, and the slider can move to block the recess.

[0015] According to an embodiment of the second aspect of the present application, an injection molding device is provided, comprising the mold glue feeding structure described above.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present application is further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 It is a structural schematic diagram of the injection molded product according to an embodiment of the present application;

[0019] Figure 2 This is a structural diagram of the lower die base in an embodiment of the present application;

[0020] Figure 3 This is a schematic diagram of the connection between the inclined ejector and the molded injection molded product in the embodiment of the present application. Figure 1 ;

[0021] Figure 4 This is a schematic diagram of the connection between the inclined ejector and the molded injection molded product in the embodiment of the present application. Figure 2 ;

[0022] Figure 5 Schematic diagram of the connection between the slider and the lift member in an embodiment of the present application;

[0023] Figure 6 This is a schematic diagram of the connection between the inclined ejector and the molded injection molded product in the embodiment of the present application. Figure 3 .

[0024] Reference numerals: injection molded product 100 , holder 110 , pouring head 120 , lower mold base 300 , injection channel 310 , slider 320 , inclined ejector 330 , ejector rod 340 . DETAILED DESCRIPTION

[0025] This section will describe the specific embodiments of the present application in detail. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0026] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0027] In the description of this application, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0028] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0029] Reference Figure 1 , the present application provides an injection molded product 100 , the inner side of which has a card seat 110 .

[0030] The present invention also provides an injection molding device for Figure 1 The injection molding of the injection molded product 100, wherein the injection molding equipment includes a mold glue feeding structure.

[0031] Through this mold glue feeding structure, the pouring head 120 produced during the injection molding process can be formed on the inner side of the injection molded product 100. Specifically, the pouring port of the pouring head 120 is located on the surface of the holder 110, and the surface of the holder 110 is a non-decorative surface. Therefore, even if there are surface defects such as air marks, it will not affect the decorative appearance of the injection molded product 100.

[0032] Among them, the mold glue feeding structure of the embodiment of the present application includes an upper mold base and a lower mold base 300, and the upper mold base can move toward the lower mold base 300 to close the mold.

[0033] The upper mold base and the lower mold base 300 are combined to form a mold cavity. The lower mold base 300 is provided with a plurality of glue injection channels 310. The glue injection channels 310 are connected to the mold cavity. The mold cavity is used for molding the injection molded product 100. The glue injection channels 310 are used to guide the glue injection liquid into the mold cavity. The glue injection channels 310 have a bending section. The glue injection port of the glue injection channel 310 extends into the mold cavity to form the cavity wall inside the injection molded product 100.

[0034] Specifically, the upper mold base is provided with a first profiling groove, and the lower mold base 300 is provided with a second profiling groove. The first profiling groove is adapted to the shape of the outer surface of the injection molded product 100, that is, the decorative appearance surface, and the second profiling groove is adapted to the shape of the inner surface of the injection molded product 100.

[0035] In the embodiment of the present application, the glue injection channel 310 is connected to the second profiling groove. When the upper mold base and the lower mold base 300 are closed, the first profiling groove and the second profiling groove are combined to form the shape of the injection molded product 100. When the glue liquid is injected into the mold cavity, the glue injection port is on the inner side of the injection molded product 100. Therefore, even if there are injection marks, it will not affect the decorative appearance of the injection molded product 100.

[0036] Compared with the prior art, the present application optimizes the glue feeding structure of the mold used for injection molding, and sets the glue injection port of the glue injection channel 310 to align with the cavity wall inside the mold cavity for molding the injection molded product 100. The glue injection port does not overlap the edge or decorative surface of the injection molded product 100, so that a buffer space is formed between the glue injection port and the decorative surface of the injection molded product 100. This avoids the glue injection liquid directly impacting the edge or outer surface of the injection molded product 100 during the final molding, effectively reducing the occurrence of injection stress of the injection molded product 100, thereby avoiding the formation of injection marks on the decorative surface or edge of the injection molded product 100 during the injection molding process, resulting in the scrapping of the product.

[0037] In addition, the present application also optimizes the glue injection channel 310 by adding a bending section to form a glue injection buffer to reduce the impact of the high-pressure glue injection liquid in the glue injection channel 310 on the mold cavity, reduce the injection pressure, and further reduce the probability of generating injection gas marks, avoid the possibility of glue overflow or leakage, and improve the molding quality of the injection molded product 100.

[0038] In some embodiments, the bent section is located near the injection port of the injection channel 310. The bent section is primarily used to slow down the injection of the glue liquid, effectively reducing the impact on the injection channel 310 and the mold cavity. Positioning the bent section near the injection channel 310 not only does not affect the high-speed injection of the glue liquid, but also provides a buffer before the glue liquid enters the mold cavity, slowing down the speed at which the glue liquid enters the mold cavity, reducing injection pressure, and further reducing the probability of injection marks.

[0039] In some embodiments, the bent section is U-shaped or concave. Specifically, the bent section is configured to be U-shaped or concave. Before the glue liquid enters the bent section, the existence of the corner causes the speed of the high-speed injection glue liquid to be slowed down after hitting the corner, and then buffered by the bent section. Finally, the speed is slowed down again at the outflow corner of the bent section. Passing through the two corners and the curved section of the bent section can effectively slow down the injection impact of the glue liquid.

[0040] Of course, in some other embodiments, the shape of the bending section can also be a multi-section bending section, specifically a zigzag shape.

[0041] In some embodiments, such as Figure 2 As shown, the lower mold base 300 includes a tilted ejector 330, part of the glue injection channel 310 is arranged on the tilted ejector 330, the glue injection port of the glue injection channel 310 is arranged on the tilted ejector 330, the tilted ejector 330 is used for demolding the formed injection molded product 100, and the tilted ejector 330 is a part of the cavity wall constituting the mold cavity.

[0042] Specifically, the inclined ejector 330 is a part of the cavity wall of the mold cavity. The inclined ejector 330 participates in the forming of the injection molded product 100. After the injection molded product 100 is formed, the inclined ejector 330 can also push the injection molded product 100 away from the lower mold base 300 to facilitate material removal.

[0043] Among them, part of the glue injection channel 310 is set on the inclined top piece 330, and the glue injection port of the glue injection channel 310 is set on the inclined top piece 330. On the one hand, after the glue injection is completed, the pouring head 120 is also formed on the inclined top piece 330. When the inclined top piece 330 demolds the injection molded product 100, the pouring head 120 can be demolded at the same time, which is beneficial to the overall demolding of the product, improves the success rate of demolding, and avoids the separation of the pouring head 120 and the injection molded product 100, and the situation where the pouring head 120 remains on the lower mold base 300.

[0044] The improvement of the injection structure of the present application does not involve adding a new structure, and it is sufficient to make slight changes to the existing mold structure. On the one hand, the changes are small and the modification cost is low, and the existing parts can be effectively utilized.

[0045] In some embodiments, the lower mold base 300 further includes a cooling channel, a portion of which passes through the inclined ejector 330. The cooling channel is used to cool the mold. Because the cooling channel also passes through the inclined ejector 330, when the coolant circulates continuously, the heat of the injection liquid in the mold cavity can be conducted through the inclined ejector 330. Therefore, the injection molded product 100 can be cooled by reducing the temperature of the inclined ejector 330, thereby increasing the molding speed of the injection molded product 100.

[0046] In some embodiments, the temperature of the injection port can be controlled by a cooling channel to ensure that the temperature at the injection port is maintained within a certain range.

[0047] In some embodiments, the lower mold base 300 also includes two push rods 340, which are connected to the inclined push piece 330. The push rods 340 are used to drive the inclined push piece 330 to perform telescopic movements. The inlet section of the cooling channel is set on one of the push rods 340, and the outlet section of the cooling channel is set on the other push rod 340.

[0048] One end of the ejector pin 340 is connected to the inclined ejector piece 330 , and the other end of the ejector pin 340 is connected to a power source. The power source drives the ejector pin 340 to extend and retract. Since the ejector pin 340 is connected to the inclined ejector piece 330 , it can drive the inclined ejector piece 330 to extend or retract to complete the demolding of the injection molded product 100 .

[0049] Specifically, ejector pins 340 are provided with channels that run from one end to the other, forming either the inlet or outlet sections of the cooling channel. The channel in one ejector pin 340 serves as the coolant inlet, while the channel in the other ejector pin 340 serves as the coolant outlet. Together with the channel in the lifter 330, these channels cool both the lifter 330 and the lower die base 300.

[0050] Compared with the existing technology, Figures 3 to 6 This application effectively utilizes the inclined ejector 330 and ejector rod 340, relocating the cooling channel to pass through the inclined ejector 330 and the ejector rod. This eliminates the need for significant modifications to the lower mold base 300, resulting in low cost. This, combined with the design of the injection port located within the inclined ejector 330, effectively improves both molding quality and efficiency. Furthermore, during the injection process, the injection liquid reaches each injection port at a low holding pressure and low injection speed.

[0051] In some embodiments, the lower die base 300 further includes a slider 320, which is used to adjust the size of the bending section. By controlling the size of the flow channel of the bending section, the speed and pressure of the injection can be controlled.

[0052] Furthermore, a recess is provided on the side of the lower die base 300 facing the upper die base, and the bending section passes through the recess, and the slider 320 can move to block the recess. Specifically, the portion of the bending section passes through the side wall and bottom of the recess and then extends to the inclined top member 330, so that the bending section is U-shaped or concave.

[0053] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A mold glue feeding structure, characterized by: include Upper die seat; A lower mold base, wherein the upper mold base and the lower mold base are combined to form a mold cavity, the lower mold base is provided with a plurality of glue injection channels, the mold cavity is used for molding injection products, the glue injection channels are used to guide the glue injection liquid into the mold cavity, the glue injection channels have a bending section, and the glue injection port of the glue injection channel extends to the cavity wall inside the mold cavity for molding the injection product.

2. The mold glue feeding structure according to claim 1, characterized in that: The bending section is close to the glue injection port of the glue injection channel.

3. The mold glue feeding structure according to claim 2, characterized in that: The bending section is U-shaped or concave.

4. The mold glue feeding structure according to claim 1, characterized in that: The lower mold base includes a tilted ejector, part of the injection channel is arranged on the tilted ejector, the injection port of the injection channel is arranged on the tilted ejector, the tilted ejector is used for demolding the formed injection product, and the tilted ejector is part of the cavity wall of the mold cavity.

5. The mold glue feeding structure according to claim 4, characterized in that: The lower die base further includes a cooling channel, and a portion of the cooling channel passes through the inclined ejector.

6. The mold glue feeding structure according to claim 5, characterized in that: The lower die base also includes two push rods, which are connected to the inclined push piece and are used to drive the inclined push piece to perform telescopic movements. The inlet section of the cooling channel is arranged on one of the push rods, and the outlet section of the cooling channel is arranged on the other push rod.

7. The mold glue feeding structure according to claim 6, characterized in that: The push rod is provided with a channel, and the channel runs through from one end of the push rod to the other end to form an inlet section or an outlet section of the cooling channel.

8. The mold glue feeding structure according to claim 1, characterized in that: The lower die base further comprises a slider, and the slider is used to adjust the size of the bending section.

9. The mold glue feeding structure according to claim 8, characterized in that: A notch is provided on a side of the lower die base facing the upper die base, the bending section passes through the notch, and the slider can move to block the notch.

10. An injection molding device, characterized in that: The invention comprises the mold glue feeding structure described in any one of claims 1 to 9.

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