Submersible glue injection mold

Abstract

The utility model provides an injection mold capable of feeding glue in a hidden mode, which comprises an upper mold plate and a lower mold plate, a forming mold cavity used for forming a product is arranged between the upper mold plate and the lower mold plate, a sprue used for injecting glue is arranged on the upper mold plate in a penetrating mode, a lower mold core is embedded on the lower mold plate, and a mold core insert is detachably arranged on the lower mold core. The mold core insert is obliquely downwards provided with a hidden glue inlet runner, the hidden glue inlet runner is provided with a glue inlet and a glue outlet, the glue inlet is positioned on the upper surface of the mold core insert, the glue outlet is positioned on the side wall of the mold core insert, the mold core insert is provided with a shearing part covering the upper circumferential surface of the hidden glue inlet runner, and the shearing part is provided with a shearing knife edge at the glue outlet. The tool nose angle alpha of the shearing tool edge is 18.5-21 degrees; during injection molding, the glue inlet and the glue outlet are respectively communicated with the sprue and the forming die cavity, and a glue material flows into the forming die cavity from the sprue along the submerged glue inlet runner; and during demolding, the shearing knife edge is used for cutting off the connection between the drainage opening material in the submerged glue runner and the product when the product is ejected out.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould technical field especially is related to a injection mould of latent progress glue. BACKGROUND

[0002] At present, with the renewal and progress of technology, the shape of injection product is more and more complex, and the appearance requirement of injection product is also higher and higher, for some injection products with curved surface, if direct gate or side gate is used to progress glue, then the progress glue mark will be left on the appearance of product, and the appearance quality of product is reduced.

[0003] In the prior art, in order to avoid leaving the progress glue mark on the appearance of product, generally latent gate is used to progress glue, and the molten glue material is used to progress glue on the inner surface of product through latent progress glue runner, thereby avoiding leaving the progress glue mark on the appearance of product.

[0004] However, when the existing injection mould of latent progress glue is demoulded, the nozzle material in the latent progress glue runner is forcibly broken with the product, and the glue powder is easily produced, and the accumulation is formed near the glue outlet after a long time, so that the product produces the wind, and the yield of product is reduced. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an injection mould of latent progress glue, which can cut the nozzle material and the product smoothly, avoid the phenomenon of pulling glue powder at the glue outlet of the latent progress glue runner, prevent the product from producing the wind, and improve the yield of product.

[0006] The utility model provides an injection mould of latent progress glue, which comprises an upper die plate and a lower die plate, a forming die cavity for forming a product is arranged between the upper die plate and the lower die plate, a plunger is arranged on the upper die plate and used for injecting glue material, a lower die core is embedded on the lower die plate, a die core insert is detachably arranged on the lower die core, the die core insert is obliquely downwardly provided with a latent progress glue runner, the latent progress glue runner has a glue inlet and a glue outlet, the glue inlet is located on the upper surface of the die core insert, the glue outlet is located on the side wall of the die core insert, the die core insert is provided with a shearing part covering the upper circumferential surface of the latent progress glue runner, the shearing part is provided with a shearing knife edge at the glue outlet, and the knife edge angle alpha of the shearing knife edge is 18.5-21.

[0007] Further, an obliquely downward shearing slope is arranged on the side wall of the die core insert, and the glue outlet is located on the shearing slope; when the product is formed, the shearing slope is in contact with the product.

[0008] Further, the inclination angle β of the shearing slope is 4°-8°.

[0009] Further, the submerged glue flow channel gradually converges along the flow direction of the glue.

[0010] Further, the submerged glue flow channel has a first flow channel and a second flow channel, the first flow channel is in communication with the second flow channel, and the cross-sectional area of the first flow channel is greater than that of the second flow channel.

[0011] Further, the submerged glue flow channel is provided with a first chamfer structure at the connection between the first flow channel and the second flow channel.

[0012] Further, the submerged glue flow channel is provided with a second chamfer structure at the periphery of the glue inlet.

[0013] Further, the bottom end of the mold core insert is provided with a limiting block for positioning the position of the mold core insert on the lower mold core.

[0014] Further, the submerged glue injection mold further comprises a ejector pin mechanism for ejecting the molded product.

[0015] Further, the submerged glue injection mold further comprises a row seat slidingly arranged on the lower mold plate.

[0016] The submerged glue injection mold provided by the utility model can block the upward movement of the water inlet material by the shearing part on the upper peripheral surface of the submerged glue flow channel when the product is ejected, and the shearing knife edge exerts a shearing force on the connection between the water inlet material and the product, so that the connection between the water inlet material and the product is automatically disconnected, the phenomenon of glue pulling powder is avoided at the periphery of the glue outlet of the submerged glue flow channel, the product is prevented from having a cape, and the yield of the product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a sectional view of the submerged glue injection mold of the utility model.

[0018] Figure 2 It is Figure 1 It is an enlarged schematic view of A.

[0019] Figure 3 It is Figure 2 It is a schematic view of the submerged glue flow channel.

[0020] Figure 4 It is Figure 3 It is a schematic view of B.

[0021] Figure 5 It is Figure 3 It is a schematic view of the shearing slope.

[0022] Figure 6A partial view of the injection molding of the injection mold of the hidden-in glue is shown in the utility model.

[0023] Figure 7 For Figure 1 The perspective view of the mold insert is shown. DETAILED DESCRIPTION

[0024] The specific embodiments of the utility model are described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0025] The terms "first", "second", "third", "fourth" and the like (if any) in the specification and claims of the utility model are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence.

[0026] The terms "up", "down", "left", "right", "front", "back", "top", "bottom" and the like (if any) in the specification and claims of the utility model are defined in terms of the position of the structure in the drawing and the position of the structure relative to each other, only to express the clarity and convenience of the technical scheme. It should be understood that the use of the orientation words should not limit the scope of the application claimed.

[0027] Please refer to Figures 1-3 and Figure 6 An injection mold of hidden-in glue, comprising an upper mold plate 10 and a lower mold plate 20, a molding cavity 40 for molding a product 100 is arranged between the upper mold plate 10 and the lower mold plate 20, a plunger 11 for injecting glue is arranged through the upper mold plate 10, a lower mold insert 21 is embedded on the lower mold plate 20, a mold insert 22 is detachably arranged on the lower mold insert 21, a hidden-in glue runner 221 is obliquely downward arranged on the mold insert 22, the hidden-in glue runner 221 has a glue inlet 2211 and a glue outlet 2212, and the glue inlet 2211 is located on the upper surface of the mold insert 22.

[0028] The glue outlet 2212 is located on the side wall of the mold insert 22, the mold insert 22 has a shear part 222 covering the upper circumferential surface of the hidden-in glue runner 221, the shear part 222 is provided with a shear knife edge 2221 at the glue outlet 2212, and the knife tip angle α of the shear knife edge 2221 is 18.5°~21°.

[0029] During injection molding, the glue inlet 2211 and the glue outlet 2212 are respectively communicated with the plunger 11 and the molding cavity 40, and the glue flows from the plunger 11 along the hidden-in glue runner 221 into the molding cavity 40.

[0030] During demolding, the shear knife edge 2221 is used to cut off the connection between the runner 200 in the hidden-in glue runner 221 and the product 100 when the product 100 is ejected.

[0031] It should be noted that the water gate material 200 refers to the excess material located in the under-cut flow channel 221 and between the under-cut flow channel 221 and the forming cavity 40. The water gate material 200 is a residual material, and the water gate material 200 needs to be separated from the product 100 to ensure that the product 100 is smoothly ejected and to ensure the quality of the product 100 when the injection molding is completed.

[0032] From the above, the injection mold of the under-cut flow channel provided by the embodiments of the present application sets the shearing part 222 on the upper circumferential surface of the under-cut flow channel 221, and when the product 100 is ejected, the shearing part 222 can block the upward movement of the water gate material 200. Relatively, the shearing edge 2221 exerts a shearing force on the connection between the water gate material 200 and the product 100, thereby automatically disconnecting the water gate material 200 from the product 100 and avoiding the phenomenon of pulling the rubber powder from the periphery of the glue outlet 2212 of the under-cut flow channel 221, thereby preventing the product 100 from producing a cape and improving the yield of the product. In addition, the mold core insert 22 is detachably arranged, and can be directly replaced after being worn, thereby preventing the lower mold core 21 from being worn to improve the service life of the mold.

[0033] Please refer to Figure 3 If the blade tip angle α is too large, the shearing effect of the shearing edge 2221 on the connection between the water gate material 200 and the product 100 is poor, which easily causes the product 100 to be left with part of the water gate material 200, thereby affecting the appearance quality of the product 100. If the blade tip angle α is too small, it will interfere with the inclination of the under-cut flow channel 221, thereby affecting the flow effect of the rubber material in the under-cut flow channel 221 and being not conducive to the smooth flow of the rubber material. After many tests, the blade tip angle α is in the range of 17°-23°, which can meet the requirements of the appearance quality of the product 100 and the inclination of the under-cut flow channel 221. Preferably, the blade tip angle α is 18.5°-21°. The blade tip angle α can be specifically set to 18.5°, 19°, 19.5°, 20°, 20.5°, 21°, etc., which is not limited to be only one of them.

[0034] Please refer to Figure 5 and Figure 7 The side wall of the mold core insert 22 is provided with a downwardly inclined shearing slope 223, and the glue outlet 2212 is located on the shearing slope 223. When the product 100 is formed, the shearing slope 223 is in contact with the product 100. When the product 100 is ejected, the product 100 is ejected upwardly, and since the shearing slope 223 is inclined, the product 100 can be more easily separated from the shearing slope 223, thereby facilitating the disconnection of the water gate material 200 from the product 100 and preventing the periphery of the glue outlet 2212 from pulling the rubber powder.

[0035] Furthermore, the inclination angle β of the shearing bevel 223 is 4°~8°. If the inclination angle β is too large, it will excessively interfere with the shape of the product 100, affecting the appearance quality of the product 100; if the inclination angle β is too small, the promoting effect of the shearing bevel 223 on the separation of the product 100 will not be obvious. After multiple tests, it was found that an inclination angle β in the range of 3°~10° can meet the requirements of both the appearance quality of the product 100 and the promoting effect of the shearing bevel 223 on the separation of the product 100. Preferably, the inclination angle β is 4°~8°. Those skilled in the art can specifically set the inclination angle β to 4°, 5°, 6°, 7°, 8°, etc., and no unique limitation is made here.

[0036] Please see Figure 3 The submerged adhesive channel 221 gradually narrows along the flow direction of the adhesive material. This setting can increase the flow speed of the adhesive material in the submerged adhesive channel 221, so as to prevent the adhesive material in the submerged adhesive channel 221 from flowing too slowly and causing some adhesive material to accumulate around the inlet 2211, thereby preventing the adhesive material from overflowing the PL surface and causing the product 100 to produce burrs.

[0037] More specifically, the submersible glue runner 221 has a first runner 2213 and a second runner 2214, which are connected. The inlet 2211 is located at one end of the first runner 2213, and the outlet 2212 is located at one end of the second runner 2214. The cross-sectional area of ​​the first runner 2213 is larger than that of the second runner 2214. This arrangement can effectively increase the flow rate of the glue material in the submersible glue runner 221 to the outlet 2212, allowing the glue material to fill the molding cavity 40 more quickly.

[0038] Furthermore, the submerged adhesive channel 221 is provided with a first chamfer structure 2215 at the connection between the first channel 2213 and the second channel 2214. The first chamfer structure 2215 can guide the adhesive material in the submerged adhesive channel 221 to flow towards the second channel 2214, preventing the adhesive material from accumulating at the connection between the first channel 2213 and the second channel 2214. The first chamfer structure 2215 can be a rounded corner or a chamfer. In this embodiment, the first chamfer structure 2215 is a rounded corner. This arrangement allows the adhesive material to flow more smoothly from the first channel 2213 to the second channel 2214.

[0039] Please see Figure 4The second chamfer structure 2216 is arranged on the periphery of the glue inlet 2211 of the hidden glue flow channel 221. When the glue flows from the nozzle 11 to the hidden glue flow channel 221, part of the glue is accumulated on the periphery of the glue inlet 2211, and the second chamfer structure 2216 can promote the glue accumulated on the periphery of the glue inlet 2211 to flow into the hidden glue flow channel 221, thereby preventing the glue from overflowing the PL surface. The second chamfer structure 2216 can be a fillet or a chamfer, and in the embodiment, the second chamfer structure 2216 is a fillet, which can make the glue flow more smoothly into the hidden glue flow channel 221.

[0040] Please refer to Figure 1 and Figure 7 The bottom end of the mold core insert 22 is provided with a limiting block 224, which is used to position the position of the mold core insert 22 on the lower mold core 21. The lower surface of the lower mold core 21 is concavely provided with a limiting groove (not marked in the figure) matched with the limiting block 224, and the limiting block 224 is arranged in the limiting groove.

[0041] Please refer to Figure 1 and Figure 2 The injection mold for hidden glue also includes a ejector pin mechanism 30 for ejecting the formed product 100. The injection mold for hidden glue also includes a row seat 50 which is slidingly arranged on the lower mold plate 20. When the mold is closed, the upper mold plate 10, the nozzle 11, the lower mold core 21, the mold core insert 22, and the row seat 50 jointly form a forming cavity 40.

[0042] The injection mold for hidden glue has the following advantages:

[0043] (1) The connection between the water gate material 200 and the product 100 is automatically disconnected, the phenomenon of pulling glue powder on the periphery of the glue outlet 2212 of the hidden glue flow channel 221 is avoided, and the product yield is improved.

[0044] (2) The glue can be prevented from overflowing the PL surface, and the product yield is improved.

[0045] The above is only a specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this. Any skilled person in the technical field can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. An injection mold for submerging glue, comprising an upper mold plate (10) and a lower mold plate (20), a molding cavity (40) for molding a product (100) is arranged between the upper mold plate (10) and the lower mold plate (20), a nozzle (11) for injecting glue is arranged through the upper mold plate (10), a lower mold core (21) is embedded on the lower mold plate (20), a mold core insert (22) is detachably arranged on the lower mold core (21), a submerging glue runner (221) is obliquely downward arranged on the mold core insert (22), the submerging glue runner (221) has a glue inlet (2211) and a glue outlet (2212), the glue inlet (2211) is located on the upper surface of the mold core insert (22), and the glue outlet (2212) is located on the side wall of the mold core insert (22), characterized in that, The mold insert (22) has a shearing part (222) covering the upper periphery of the hidden feed flow channel (221), and the shearing part (222) is provided with a shearing knife edge (2221) at the glue outlet (2212), and the knife tip angle α of the shearing knife edge (2221) is 18.5°-21°; During injection molding, the glue inlet (2211) and the glue outlet (2212) are respectively communicated with the nozzle (11) and the molding cavity (40), and the glue flows from the nozzle (11) along the hidden feed flow channel (221) into the molding cavity (40); During demolding, the shearing knife edge (2221) is used to cut off the connection between the sprue (200) in the hidden feed flow channel (221) and the product (100) when the product (100) is ejected.

2. The sink-in adhesive injection mold of claim 1, wherein, An inclined downward shearing slope (223) is arranged on the side wall of the mold insert (22), and the glue outlet (2212) is located on the shearing slope (223); during molding of the product (100), the shearing slope (223) is in contact with the product (100).

3. The sink-in adhesive injection mold of claim 2, wherein, The inclination angle β of the shearing slope (223) is 4°-8°.

4. The sink-in adhesive injection mold of claim 1, wherein, The hidden feed flow channel (221) gradually converges along the flow direction of the glue.

5. The sink-in adhesive injection mold of claim 4, wherein, The hidden feed flow channel (221) has a first flow channel (2213) and a second flow channel (2214), the first flow channel (2213) and the second flow channel (2214) are communicated, and the cross-sectional area of the first flow channel (2213) is greater than that of the second flow channel (2214).

6. The sink-in adhesive injection mold of claim 5, wherein, The hidden feed flow channel (221) is provided with a first chamfer structure (2215) at the connection between the first flow channel (2213) and the second flow channel (2214).

7. The sink-in adhesive injection mold of claim 1 wherein, The hidden feed flow channel (221) is provided with a second chamfer structure (2216) at the periphery of the glue inlet (2211).

8. The sink-in adhesive injection mold of claim 1 wherein, The bottom end of the mold insert (22) is provided with a limiting block (224), and the limiting block (224) is used to position the position of the mold insert (22) on the lower mold insert (21).

9. The ejection-molded injection-molded article of claim 1, wherein, The injection mold of the hidden feed also includes a ejector pin mechanism (30) for ejecting the molded product (100).

10. The sink-in adhesive injection mold of claim 1 wherein, The injection mold of the hidden feed also includes a row seat (50) which is slidingly arranged on the lower mold plate (20).

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