Ox horn glue feeding injection mold

Abstract

An ox horn glue feeding injection mold comprises an upper mold plate, a lower mold plate and a hot runner plate, the hot runner plate, the upper mold plate and the lower mold plate are sequentially arranged from top to bottom, an upper mold core is embedded in the upper mold plate, a lower mold core is embedded in the lower mold plate, a cavity is formed between the upper mold core and the lower mold core, and the upper mold plate is provided with a sprue. A sprue runner of the sprue is communicated with a hot runner of the hot runner plate, the upper mold core is provided with a glue inlet insert, the glue inlet insert is provided with a glue inlet runner communicated with the sprue runner, the lower mold core is provided with a mold core insert, and an ox-horn-shaped runner is arranged on the mold core insert in a penetrating mode. The two ends of the oxhorn-shaped runner are located on the upper surface of the mold core insert and the side wall of the mold core insert respectively, a glue inlet is formed in the end, located on the upper surface of the mold core insert, of the mold core insert, and a protruding part is arranged on the inner wall, close to the glue inlet, of the oxhorn-shaped runner in a protruding mode; and during mold closing, the glue inlet insert is propped against the mold core insert, the glue inlet runner is communicated with the oxhorn-shaped runner, and the oxhorn-shaped runner is communicated with the cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an ox horn glue injection mold. Background Art

[0002] At present, with the updating and advancement of technology, the shapes of injection molded products are becoming more and more complex, and at the same time, the requirements for the appearance of injection molded products are becoming higher and higher. For some injection molded products with curved surfaces, if direct gates or side gates are used for glue injection, glue injection marks will be left on the appearance of the product, making the product unsightly.

[0003] In the prior art, in order to avoid leaving glue injection marks on the appearance of the product, a latent gate is generally used for glue injection, and the bull horn glue injection structure is a common latent gate glue injection method. The bull horn glue injection structure is a bull horn-shaped runner. The molten glue is injected into the inner surface of the product through the bull horn-shaped runner, thereby avoiding leaving glue injection marks on the appearance of the product.

[0004] However, the existing injection mold structure that uses ox horn to feed glue is relatively complex, and the ox horn-shaped flow channel is more likely to accumulate glue and overflow the PL surface of the mold. Over time, glue powder is generated on the PL surface of the mold, causing the product to have a flash and reducing the product yield. Utility Model Content

[0005] The purpose of the utility model is to provide an injection mold for feeding glue through ox horns, so as to solve the problems that the structure of the current injection mold for feeding glue through ox horns is relatively complex and the ox horn-shaped flow channel is prone to accumulation of glue.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A horn injection mold comprises an upper mold plate, a lower mold plate and a hot runner plate. The hot runner plate, the upper mold plate and the lower mold plate are arranged in sequence from top to bottom. The upper mold plate is embedded with an upper mold core, the lower mold plate is embedded with a lower mold core, and a cavity for molding products is provided between the upper mold core and the lower mold core. The upper mold plate is provided with a nozzle that abuts against the upper mold core, and the nozzle flow channel of the nozzle is connected to the hot runner of the hot runner plate. The upper mold core is provided with a glue inlet insert that abuts against the nozzle, and the glue inlet insert has a glue inlet flow channel connected to the nozzle flow channel. The lower mold core is provided with a mold core insert that cooperates with the glue inlet insert. A bull horn-shaped flow channel is provided through the mold core insert. The two ends of the bull horn-shaped flow channel are respectively located on the upper surface of the mold core insert and the side wall of the mold core insert. The end located on the upper surface of the mold core insert is the glue inlet, and the end located on the side wall of the mold core insert is the glue outlet. The mold core insert is provided with a protrusion on the inner wall of the bull horn-shaped flow channel near the glue inlet; when the mold is closed, the glue inlet insert and the mold core insert are in contact with each other, the glue inlet flow channel is connected with the bull horn-shaped flow channel, and the bull horn-shaped flow channel is connected with the mold cavity.

[0008] Furthermore, the raised portion is located on the side of the horn-shaped flow channel with the longest arc length.

[0009] Furthermore, the protrusion transitions smoothly to the inner wall of the ox-horn-shaped flow channel.

[0010] Furthermore, the radian of the ox-horn-shaped flow channel is 5π / 12~17π / 36.

[0011] Furthermore, a glue outlet section is provided at the lower end of the glue inlet channel. The glue outlet section is in the shape of an inverted trumpet and contracts inwardly toward the mold insert.

[0012] Furthermore, the end of the glue outlet section is a glue delivery port, and the cross-sectional area of ​​the glue delivery port is larger than the cross-sectional area of ​​the glue inlet of the ox-horn-shaped flow channel.

[0013] Furthermore, the edge of the glue inlet is provided with a chamfer structure.

[0014] Furthermore, the chamfered structure is a rounded corner, and the radius of the rounded corner is 0.08mm~0.14mm.

[0015] Furthermore, a slide assembly is provided on the lower template, and the slide assembly includes a slide seat slidably set on the lower template and a slide insert connected to the slide seat. The slide seat is provided with a guide inclined hole, and the upper template is provided with an inclined guide column matching the guide inclined hole. The upper template pushes the slide seat through the inclined guide column to drive the slide insert to slide.

[0016] Furthermore, the slide insert, the glue inlet insert, the mold core insert, and the lower mold core together surround the molding cavity.

[0017] The beneficial effects of the ox-horn-shaped injection mold provided by this utility model include: through the combination of the mold core insert and the ox-horn-shaped runner, not only can the glue be injected from the inside of the product, but the mold structure is also more compact and simple. The raised portion provided on the inner wall of the ox-horn-shaped runner increases the flow rate of the molten rubber in the ox-horn-shaped runner, thereby reducing the accumulation of the molten rubber and preventing the molten rubber from overflowing onto the PL surface of the mold, thereby causing flashing on the product. Therefore, the ox-horn-shaped injection mold not only has a relatively simple structure, but also improves the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of a ox horn glue injection mold of the utility model.

[0019] Figure 2 for Figure 1 A magnified schematic diagram.

[0020] Figure 3 for Figure 2 Schematic diagram of the bullhorn flow channel shown.

[0021] Figure 4 for Figure 3 Schematic diagram after enlargement of point B in the middle.

[0022] Figure 5 for Figure 1 A three-dimensional view of the mold insert is shown.

[0023] Figure 6 for Figure 1 The exploded perspective view of the slide assembly is shown. DETAILED DESCRIPTION

[0024] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] The terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", "horizontal", etc. in the specification and claims of the present utility model indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the clarity of expressing the technical solutions and the convenience of description, and therefore cannot be understood as limiting the present application.

[0026] It should be noted that the "PL surface" mentioned in the present invention refers to the part where the upper mold and the lower mold are in contact when the ox horn injection mold is in the closed mold state.

[0027] See also Figure 1-Figure 3 and Figure 5 A bull horn glue injection mold comprises an upper template 20, a lower template 50 and a hot runner plate 10. The hot runner plate 10, the upper template 20 and the lower template 50 are arranged in sequence from top to bottom. The upper template 20 is embedded with an upper mold core 30, and the lower template 50 is embedded with a lower mold core 40. A cavity 60 for molding a product is provided between the upper mold core 30 and the lower mold core 40. The upper template 20 is penetrated by a nozzle 21 that abuts against the upper mold core 30, and the nozzle flow channel 211 of the nozzle 21 is connected to the hot runner 11 of the hot runner plate 10.

[0028] The upper mold core 30 is provided with a glue feed insert 31 that abuts the nozzle 21, and the glue feed insert 31 has a glue feed flow channel 311 connected to the nozzle flow channel 211. The lower mold core 40 is provided with a mold core insert 41 that cooperates with the glue feed insert 31, and a bull horn-shaped flow channel 411 is provided on the mold core insert 41, and the two ends of the bull horn-shaped flow channel 411 are respectively located on the upper surface of the mold core insert 41 and the side wall of the mold core insert 41.

[0029] One end located on the upper surface of the mold insert 41 is the glue inlet 4111, and one end located on the side wall of the mold insert 41 is the glue outlet 4112. The mold insert 41 is provided with a protrusion 412 on the inner wall of the bull-horn flow channel 411 near the glue inlet 4111, and the protrusion 412 is located on the inner wall of the bull-horn flow channel 411 with the longest arc length.

[0030] Furthermore, the protrusion 412 is located on the side of the horn-shaped flow channel 411 with the longest arc length.

[0031] When the mold is closed, the glue inlet insert 31 abuts against the mold core insert 41 , the glue inlet flow channel 311 is connected to the bullhorn flow channel 411 , and the bullhorn flow channel 411 is connected to the mold cavity 60 .

[0032] As described above, the ox-horn glue injection mold proposed in the present invention, through the combination of the mold core insert 41 and the ox-horn-shaped runner 411, not only realizes glue injection from the inside of the product, but also makes the structure of the mold more compact and simple. By protruding the protrusion 412 on the inner wall of the ox-horn-shaped runner 411, the protrusion 412 can increase the flow rate of the molten rubber in the ox-horn-shaped runner 411, thereby reducing the accumulation of molten rubber and preventing the molten rubber from overflowing onto the PL surface of the mold and causing the product to flash. Therefore, the ox-horn glue injection mold not only has a relatively simple structure, but also improves the product yield.

[0033] See also Figure 3 The protrusion 412 transitions smoothly with the inner wall of the bull-horn-shaped flow channel 411 , thereby ensuring that the molten rubber in the bull-horn-shaped flow channel 411 can flow smoothly and avoiding the accumulation of rubber.

[0034] The curvature of the bullhorn-shaped runner 411 is 7π / 18~π / 2. If the curvature of the bullhorn-shaped runner 411 is too large, the molten rubber may accumulate at the lowest point of the bullhorn-shaped runner 411, thereby affecting the flow of the molten rubber and causing rubber accumulation; if the curvature of the bullhorn-shaped runner 411 is too small, the location of the bullhorn-shaped runner 411 makes it difficult for the glue outlet 4112 to cooperate with the mold cavity 60, resulting in an inability to inject glue from the inside of the product. After multiple tests, the curvature of the bullhorn-shaped runner 411 is within the range of 7π / 18~π / 2, which is compatible with the requirements of smooth rubber flow and the coordination of the bullhorn-shaped runner 411 with the mold cavity 60. Preferably, the curvature of the bullhorn-shaped runner 411 is 5π / 12~17π / 36. Those skilled in the art may specifically set the radian of the ox-horn-shaped flow channel 411 to 5π / 12, 13π / 30, 4π / 9, 41π / 90, 17π / 36, etc., which is not limited here.

[0035] See also Figure 2-Figure 4 A glue outlet section 312 is provided at the lower end of the glue inlet channel 311. The glue outlet section 312 is in the shape of an inverted trumpet and shrinks inward toward the mold insert 41. The glue outlet section 312 can increase the flow rate of the molten glue flowing into the bull-horn-shaped channel 411, thereby preventing the molten glue from accumulating on the contact surface between the glue inlet insert 31 and the mold insert 41.

[0036] Furthermore, the end of the glue outlet section 312 is a glue delivery port 313 , and the cross-sectional area of ​​the glue delivery port 313 is larger than the cross-sectional area of ​​the glue inlet 4111 of the bullhorn flow channel 411 . This arrangement can further increase the flow rate of the molten glue flowing into the bullhorn flow channel 411 .

[0037] Furthermore, the edge of the glue inlet 4111 is provided with a chamfered structure. Since the cross-sectional area of ​​the glue delivery port 313 is larger than that of the glue inlet 4111, when the molten glue flows into the bullhorn-shaped flow channel 411, some glue accumulates at the edge of the glue inlet 4111. The chamfered structure can promote the molten glue accumulated at the edge of the glue inlet 4111 to flow into the bullhorn-shaped flow channel 411, thereby preventing the molten glue from accumulating on the PL surface.

[0038] See also Figure 4 In this embodiment, the chamfered structure is a rounded corner.

[0039] More specifically, the radius R of the fillet is 0.06mm to 0.15mm. The larger the radius R, the more conducive it is to promoting the molten glue accumulated at the edge of the glue inlet 4111 to flow into the bullhorn-shaped flow channel 411. However, if the radius R is too large, the cross-sectional area of ​​the glue inlet 4111 will be larger than the cross-sectional area of ​​the glue delivery port 313, which will not only make the chamfered structure lose its original function, but also cause the molten glue to remain at the edge of the glue delivery port 313 and invade the PL surface. In addition, if the radius R is too small, the diversion effect of the chamfered structure will not be obvious. After multiple tests, the radius R is within the range of 0.06mm to 0.15mm, which can meet the diversion effect and the cross-sectional area size requirements of the glue inlet 4111. Preferably, the radius R is 0.08mm to 0.14mm. Those skilled in the art can specifically set the radius R to 0.08mm, 0.10mm, 0.12mm, 0.14mm, etc., and this is not a single limitation here.

[0040] See also Figure 1 and Figure 6 A slide assembly 51 is provided on the lower template 50, and the slide assembly 51 includes a slide seat 511 slidably provided on the lower template 50 and a slide insert 512 connected to the slide seat 511, and the slide insert 512 is slidably connected to the lower mold core 40.

[0041] More specifically, a buckling protrusion 5111 is convexly provided on the slider seat 511 , and a buckling groove 5121 matching with the buckling protrusion 5111 is concavely provided on the slider insert 512 , and the buckling protrusion 5111 is buckled in the buckling groove 5121 .

[0042] The slider seat 511 is provided with a guide inclined hole 5112 , and the upper template 20 is provided with an inclined guide column 22 that matches the guide inclined hole 5112 . The upper template 20 pushes the slider seat 511 through the inclined guide column 22 to drive the slider insert 512 to slide.

[0043] See also Figure 2 The slider insert 512 cooperates with the upper mold core 30, the lower mold core 40, the glue feed insert 31, and the mold core insert 41, respectively. The slider insert 512, the glue feed insert 31, the mold core insert 41, and the lower mold core 40 together enclose the mold cavity 60. The slider insert 512 is easy to disassemble, and any residual glue on the slider insert 512 can be cleaned promptly, thereby reducing the occurrence of flash on the product and further improving the product yield.

[0044] The utility model has the beneficial effects of the ox horn glue injection mold: not only the structure is relatively simple, but also the product yield is improved.

[0045] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A horn injection mold, comprising an upper template, a lower template and a hot runner plate, wherein the hot runner plate, the upper template and the lower template are sequentially arranged from top to bottom, the upper template is embedded with an upper mold core, the lower template is embedded with a lower mold core, a cavity for molding a product is provided between the upper mold core and the lower mold core, the upper template is penetrated by a nozzle abutting against the upper mold core, the nozzle flow channel of the nozzle is connected to the hot runner of the hot runner plate, and is characterized in that: The upper mold core is provided with a glue inlet insert that abuts against the nozzle, and the glue inlet insert has a glue inlet flow channel connected to the nozzle flow channel. The lower mold core is provided with a mold core insert that cooperates with the glue inlet insert, and a bullhorn-shaped flow channel is provided on the mold core insert, and the two ends of the bullhorn-shaped flow channel are respectively located on the upper surface of the mold core insert and the side wall of the mold core insert, one end located on the upper surface of the mold core insert is the glue inlet, and one end located on the side wall of the mold core insert is the glue outlet, and the mold core insert is provided with a protrusion on the inner wall of the bullhorn-shaped flow channel near the glue inlet; When the mold is closed, the glue inlet insert abuts against the mold core insert, the glue inlet flow channel is connected with the bullhorn flow channel, and the bullhorn flow channel is connected with the mold cavity.

2. The ox horn injection mold according to claim 1, characterized in that: The protrusion is located on the side of the ox-horn-shaped flow channel with the longest arc length.

3. The ox horn injection mold according to claim 1, characterized in that: The protrusion transitions smoothly to the inner wall of the ox-horn-shaped flow channel.

4. The ox horn injection mold according to claim 1, characterized in that: The radian of the ox-horn-shaped flow channel is 5π / 12~17π / 36.

5. The ox horn injection mold according to claim 1, characterized in that: A glue outlet section is provided at the lower end of the glue inlet channel. The glue outlet section is in an inverted trumpet shape and shrinks inwardly toward the mold core insert.

6. The ox horn injection mold according to claim 5, characterized in that: The end of the glue outlet section is a glue delivery port, and the cross-sectional area of ​​the glue delivery port is larger than the cross-sectional area of ​​the glue inlet of the ox-horn-shaped flow channel.

7. The ox horn injection mold according to claim 6, characterized in that: The edge of the glue inlet is provided with a chamfer structure.

8. The ox horn injection mold according to claim 7, characterized in that: The chamfered structure is a rounded corner, and the radius of the rounded corner is 0.08mm~0.14mm.

9. The ox horn injection mold according to claim 1, characterized in that: The lower template is provided with a slide assembly, and the slide assembly includes a slide seat slidably set on the lower template and a slide insert connected to the slide seat. The slide seat is provided with a guide inclined hole, and the upper template is provided with an inclined guide column matching the guide inclined hole. The upper template pushes the slide seat through the inclined guide column to drive the slide insert to slide.

10. The ox horn injection mold according to claim 9, characterized in that: The slide insert, the glue inlet insert, the mold core insert, and the lower mold core together form the mold cavity.

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