Injection mold with hidden gate

Abstract

The utility model provides a kind of injection mold of submerged sheet glue feeding, including upper die fixed plate, water gap plate, upper die, lower die, upper die fixed plate is provided with syringe, syringe is downwardly perforated water gap plate, upper die is perforated and is provided with glue injection runner, upper die is provided with the cavity for the product of shaping between lower die, the injection mold of this submerged sheet glue feeding still includes line seat and inclined top piece, line seat is slid on lower die, line seat is provided with conveying runner, line seat is protruded and is provided with glue outlet towards cavity, glue outlet is perforated and is provided with submerged glue runner, one end of submerged glue runner is communicated with conveying runner, the other end of submerged glue runner is provided with glue outlet, glue outlet is recessed and is provided with chute at its end, chute is located above glue outlet, lower die is recessed and is provided with communicating groove;Inclined top piece is perforated lower die and protrudes cavity, the upper end of inclined top piece is recessed and is provided with glue outlet groove;After injection molding, product is formed in cavity, communicating groove, chute, glue outlet groove are jointly formed and are connected with the submerged sheet of product.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold for submerged insert injection. Background Technology

[0002] Currently, many products such as mobile phone back covers and laptop back covers use a submerged gate for gluing to avoid leaving glue marks on the product's exterior surface. The molten glue is injected into the inner surface of the product through the submerged glue channel, thus avoiding leaving glue marks on the product's exterior surface.

[0003] In existing technologies, the injection method of using a submerged sheet to inject glue is commonly used to produce products such as mobile phone back covers and laptop back covers. After the product is formed, the sprue is cut off from the submerged sheet using a punching fixture.

[0004] However, when using a submarine injection mold, during demolding, the injection mold outlet pulls out some of the material. This material remains on the submarine injection mold. During demolding, this material is ejected along with the submarine injection mold and is scraped off by the lower mold, resulting in residual powder on the lower mold. Over time, this powder accumulates on the lower mold, affecting the normal operation of the injection mold and the molding of the product, thus reducing production efficiency and product yield. Utility Model Content

[0005] The purpose of this invention is to provide an injection mold with a submersible injection plate, which aims to solve or at least partially solve the shortcomings of the above-mentioned background technology. It can prevent the glue material pulled out at the injection port from scraping against the lower mold, avoid the accumulation of glue powder in the lower mold, and thus ensure the normal operation of the injection mold and the molding of the product.

[0006] This utility model provides a submersible injection mold, comprising, from top to bottom, an upper mold fixing plate, a sprue plate, an upper mold, and a lower mold. The upper mold fixing plate has a nozzle for injecting adhesive, which penetrates downwards through the sprue plate. The upper mold has an injection channel for receiving adhesive from the nozzle. A mold cavity for molding the product is provided between the upper and lower molds. The submersible injection mold also includes a slide seat and a lifter. The slide seat slides on the lower mold and has a conveying channel. A dispensing portion protrudes from the slide seat towards the mold cavity, and the dispensing portion has a submersible adhesive channel extending through it. One end of the submersible adhesive channel is connected to the conveying channel. The other end of the submerged runner is provided with an outlet. The outlet part has a recessed sloping groove at its end, which is located above the outlet. The lower mold has a recessed connecting groove that can communicate with the sloping groove. The sloping ejector obliquely penetrates the lower mold and can obliquely protrude upward from the mold cavity. The upper end of the sloping ejector has a recessed outlet groove that can communicate with the outlet. In the mold closed state, the slide seat is located on one side of the mold cavity, and the outlet groove is located below the mold cavity. The nozzle, injection runner, delivery runner, submerged runner, outlet groove, sloping groove, connecting groove, and mold cavity are connected. After injection molding, the product is formed in the mold cavity, and the connecting groove, sloping groove, and outlet groove together form a submerged piece that is connected to the product.

[0007] Furthermore, the inclined groove has a first groove wall and a second groove wall, the first groove wall being an inclined surface and the second groove wall being a vertical surface or an inclined surface.

[0008] Furthermore, the angle β between the first tank wall and the horizontal plane is 15°~30°, and the second tank wall is an inclined plane.

[0009] Furthermore, a first rounded corner structure is provided at the connection between the first tank wall and the second tank wall.

[0010] Furthermore, the connecting groove has a third groove wall, which is in the same plane as the second groove wall.

[0011] Furthermore, the lower mold has a connecting hole that mates with the ejector section and an inclined guide hole that mates with the inclined ejector, and the connecting hole, the inclined guide hole, and the connecting groove are connected together.

[0012] Furthermore, a protrusion is provided at the connection between the inner wall of the glue outlet groove and the upper surface of the inclined top component.

[0013] Furthermore, the protrusion smoothly transitions to the inner wall of the dispensing groove.

[0014] Furthermore, a second rounded corner structure is provided at the connection between the inner wall of the dispensing groove and the bottom wall.

[0015] Furthermore, it also includes an ejector mechanism, which includes an ejector plate connected to and used to drive the angled ejector.

[0016] The injection mold with a submerged insert for injection provided by this utility model achieves submerged insert injection by setting a submerged insert channel on the slide seat and a discharge groove on the inclined ejector. The cooperation of the submerged insert channel and the discharge groove enables the material to enter from the non-appearance surface of the product, avoiding appearance defects on the product's appearance surface. Through the cooperation of the inclined groove, the connecting groove, and the discharge groove, the protrusion is located above the discharge port. During demolding, the material pulled out of the discharge port will remain on the submerged insert and be located below the protrusion. The end of the submerged insert with the protrusion will detach from the lower mold before the material remaining on the submerged insert, which can prevent the material remaining on the submerged insert from contacting the lower mold, thereby avoiding scraping with the lower mold and preventing the accumulation of glue powder in the lower mold. This ensures the normal operation of the injection mold with submerged insert injection and the molding of the product. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention 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.

[0018] Figure 1 This is a cross-sectional view of an injection mold for a submersible injection device according to the present invention in the mold-closed state.

[0019] Figure 2 This is a cross-sectional view of the injection mold for injecting glue into a submersible after injection molding.

[0020] Figure 3 This is a cross-sectional view of the injection mold for the submersible injection of the present invention after demolding.

[0021] Figure 4 for Figure 1 A magnified diagram of point A in the middle.

[0022] Figure 5 for Figure 4 A schematic diagram of the inclined groove shown.

[0023] Figure 6 for Figure 3 A magnified diagram of point B in the middle.

[0024] Figure 7 for Figure 1 The cross-sectional view of the lower mold shown.

[0025] Figure 8 for Figure 7 A magnified diagram of point C.

[0026] Figure 9 for Figure 1The perspective view of the inclined top component shown.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 10. Upper mold fixing plate; 100. Submerged plate; 101. Protrusion; 102. Groove; 11. Sprue; 20. Sprue plate; 30. Upper mold; 31. Injection channel; 32. Angled guide post; 40. Lower mold; 41. Connecting groove; 42. Third groove wall; 43. Connecting hole; 44. Angled guide hole; 50. Sliding seat; 51. Conveying channel; 52. Glue outlet; 53. Angled groove; 531. First groove wall; 532. Second groove wall; 533. First rounded corner structure; 54. Submerged glue channel; 55. Glue outlet; 60. Angled ejector; 61. Glue outlet groove; 62. Protrusion; 63. Second rounded corner structure; 70. Ejector mechanism; 71. Ejector plate; 72. Connecting block; 73. Ejector pin; 80. Mold cavity; 90. Product. Detailed Implementation

[0029] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0030] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0031] The directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" (if present) used in the specification and claims of this utility model are defined according to the position of the structures in the drawings and the relative positions of the structures, and are only for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed in this application.

[0032] Please see Figures 1-4 and Figures 6-9 A submersible injection mold includes an upper mold fixing plate 10, a sprue plate 20, an upper mold 30, and a lower mold 40 arranged sequentially from top to bottom. The upper mold fixing plate 10 is provided with a nozzle 11 for injecting glue. The nozzle 11 penetrates downward through the sprue plate 20. The upper mold 30 is provided with a glue injection channel 31 for receiving the glue from the nozzle 11. A mold cavity 80 for molding a product 90 is provided between the upper mold 30 and the lower mold 40.

[0033] The injection mold for the submerged insert also includes a slide seat 50 and an inclined ejector 60.

[0034] The slide seat 50 is slidably mounted on the lower mold 40. A conveying channel 51 is provided on the slide seat 50. A glue outlet 52 protrudes from the slide seat 50 towards the mold cavity 80. A submerged glue channel 54 extends through the glue outlet 52. One end of the submerged glue channel 54 is connected to the conveying channel 51, and the other end of the submerged glue channel 54 is provided with a glue outlet 55. A sloping groove 53 is recessed at the end of the glue outlet 52, located above the glue outlet 55. The lower mold 40 is recessed with a connecting groove 41 that communicates with the sloping groove 53. More specifically, the upper mold 30 is provided with a sloping guide post 32, which drives the slide seat 50 to reciprocate horizontally on the lower mold 40.

[0035] The inclined ejector 60 passes through the lower mold 40 at an angle and can protrude upward from the mold cavity 80 at an angle. The upper end of the inclined ejector 60 is recessed with a glue outlet groove 61 that can communicate with the glue outlet 55.

[0036] In the mold-closed state, the slide seat 50 is located on one side of the mold cavity 80, the glue outlet 61 is located below the mold cavity 80, and the nozzle 11, the glue injection channel 31, the conveying channel 51, the submerged glue channel 54, the glue outlet 61, the inclined groove 53, the connecting groove 41, and the mold cavity 80 are connected.

[0037] After injection molding, the product 90 is formed in the mold cavity 80, and the connecting groove 41, the inclined groove 53, and the ejection groove 61 together form the submerged piece 100 connected to the product 90.

[0038] During demolding, the submersible 100 is ejected along with the product 90. The submersible 100 needs to be cut off in subsequent processing to separate it from the product 90, thus obtaining an independent product 90.

[0039] More specifically, the submersible 100 has a protrusion 101 that protrudes toward the row seat 50, wherein the protrusion 101 is formed by curing adhesive material at the inclined groove 53 and the connecting groove 41.

[0040] As described above, the injection mold for submerged inserts provided by this utility model, by providing a submerged insert channel 54 on the slide seat 50 and a glue outlet groove 61 on the inclined ejector 60, achieves submerged insert injection in the mold through the cooperation of the submerged insert channel 54 and the glue outlet groove 61, allowing the glue to enter from the non-appearance surface of the product 90, thus avoiding appearance defects on the appearance surface of the product 90; through the cooperation of the inclined groove 53, the connecting groove 41, and the glue outlet groove 61, the protrusion 101 is located at the glue outlet 55. At the top, during demolding, the material pulled out from the ejector 55 will remain on the submerged piece 100 and below the protrusion 101. One end of the submerged piece 100 with the protrusion 101 will detach from the lower mold 40 before the material remaining on the submerged piece 100. This prevents the material remaining on the submerged piece 100 from contacting the lower mold 40, thus avoiding scraping against the lower mold 40 and preventing the lower mold 40 from having residual glue powder and accumulating. This ensures the normal operation of the injection mold for the submerged piece and the molding of the product 90.

[0041] Please see Figure 7 and Figure 8 The lower mold 40 has a connecting hole 43 that mates with the ejector section 52 and an inclined guide hole 44 that mates with the inclined ejector 60. The connecting hole 43, the inclined guide hole 44, and the connecting groove 41 are connected. Through the cooperation of the connecting hole 43 and the inclined guide hole 44, the ejector 55, the ejector groove 61, the inclined groove 53, and the connecting groove 41 are connected in the mold closed state.

[0042] Please see Figure 5 The inclined groove 53 has a first groove wall 531 and a second groove wall 532. The first groove wall 531 is an inclined surface that is inclined away from the slide seat 50, and the second groove wall 532 is a vertical surface or an inclined surface that is inclined away from the slide seat 50. This arrangement ensures that the included angle α between the first groove wall 531 and the second groove wall 532 is an obtuse angle, thereby ensuring that when the product 90 is ejected from the mold, the protruding part 101 of the submersible piece 100 does not interfere with the lower mold 40.

[0043] In this embodiment, the angle β between the first groove wall 531 and the horizontal plane is 15°~30°, and the second groove wall 532 is an inclined surface. It is understood that if the angle β is too large, the inclined groove 53 will interfere with the arrangement of the submerged adhesive channel 54 and the adhesive outlet 55, affecting the normal function of the adhesive outlet 52; if the angle β is too small, the angle α will approach 90°, resulting in adhesive residue in the inclined groove 53. Through multiple tests, an angle β within the range of 10°~45° can accommodate the normal function of the adhesive outlet 52 while preventing adhesive residue in the inclined groove 53. Preferably, the angle β is 15°~30°. Those skilled in the art can specifically set the angle β to 15°, 20°, 25°, 30°, etc., and this is not a unique limitation.

[0044] Furthermore, a first rounded corner structure 533 is provided at the connection between the first groove wall 531 and the second groove wall 532. The first rounded corner structure 533 makes it easier for the adhesive to separate from the inclined groove 53, thereby effectively preventing adhesive residue in the inclined groove 53.

[0045] Please see Figure 4 The connecting groove 41 has a third groove wall 42, which is in the same plane as the second groove wall 532. In this embodiment, the third groove wall 42 is an inclined surface. This setting can further ensure that when the product 90 is ejected from the mold, the protruding part 101 of the submersible piece 100 does not interfere with the lower mold 40 and can smoothly detach from the lower mold 40.

[0046] Please see Figure 4 and Figure 6 The dispensing groove 61 has a protrusion 62 at the connection between its inner side wall and the upper surface of the inclined top member 60. Correspondingly, during injection molding, the protrusion 62 causes the submerged sheet 100 to be formed with a groove 102. The groove 102 is located at the connection between the product 90 and the submerged sheet 100. The groove 102 helps the submerged sheet 100 to be removed in subsequent processing, making it easier to separate the submerged sheet 100 from the product 90 and improving production efficiency.

[0047] Furthermore, the protrusion 62 and the inner wall of the glue dispensing groove 61 are smoothly connected, which can effectively prevent glue residue from remaining at the connection between the protrusion 62 and the inner wall groove of the glue dispensing groove 61.

[0048] Furthermore, a second rounded corner structure 63 is provided at the connection between the inner side wall and the bottom wall of the glue dispensing groove 61. This arrangement makes it easier for the glue to separate from the glue dispensing groove 61, further preventing glue residue from remaining in the glue dispensing groove 61.

[0049] Please see Figures 1-3 The injection mold for the submerged insert also includes an ejector mechanism 70, which includes an ejector plate 71. The ejector plate 71 is connected to the inclined ejector 60 and is used to drive the inclined ejector 60.

[0050] Furthermore, a connecting block 72 is provided on the ejector plate 71, and the connecting block 72 is movably connected to the lower end of the inclined ejector 60. During demolding, the ejector plate 71 drives the inclined ejector 60 to protrude out of the mold cavity 80 to eject the product 90.

[0051] More specifically, ejector plate 71 is also provided with ejector pin 73, which penetrates the lower mold 40 from bottom to top. Ejector pin 73 is used to work with inclined ejector 60 to eject product 90.

[0052] The working process of the injection mold for the submersible injection in this embodiment:

[0053] (1) Please refer to Figure 1In the mold-closed state, the ejector section 52 of the slide seat 50 is located in the connecting hole 43, and the upper surface of the inclined ejector 60 is flush with the bottom wall of the mold cavity 80. The nozzle 11, injection channel 31, conveying channel 51, submerged injection channel 54, ejector groove 61, inclined groove 53, connecting groove 41, and mold cavity 80 are connected. During injection molding, the molten rubber flows from the nozzle 11 through the injection channel 31, conveying channel 51, and submerged injection channel 54 in sequence. Then, the molten rubber flows into the ejector groove 61 through the ejector 55 and gradually fills the ejector groove 61, inclined groove 53, and connecting groove 41. Finally, the molten rubber flows into and fills the mold cavity 80.

[0054] (2) Please refer to Figure 2 After injection molding, the product 90 is formed in the mold cavity 80. The connecting groove 41, the inclined groove 53, and the ejection groove 61 are jointly formed to form a submerged piece 100 connected to the product 90. The protruding part 101 abuts against the inclined groove 53 and the connecting groove 41.

[0055] (3) Please refer to Figure 3 During demolding, the upper mold 30 drives the slide seat 50 to slide away from the mold cavity 80 via the inclined guide pillar 32, and the ejector part 52 disengages from the submerged piece 100. The ejector plate 71 drives the inclined ejector 60 and ejector pin 73 to move upward. The inclined ejector 60 and ejector pin 73 together move the submerged piece 100 and the product 90 upward to the predetermined position, whereby the operator can manually remove the product 90 and the submerged piece 100. In subsequent processing, the operator cuts off the submerged piece 100 to separate it from the product 90, thus obtaining the independent product 90.

[0056] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An injection mold for injecting glue into a submersible, comprising, from top to bottom, an upper mold fixing plate (10), a sprue plate (20), an upper mold (30), and a lower mold (40), wherein the upper mold fixing plate (10) is provided with a nozzle (11) for injecting glue, the nozzle (11) extending downward through the sprue plate (20), the upper mold (30) having a through-hole for receiving the glue from the nozzle (11), and a mold cavity (80) for molding a product (90) being provided between the upper mold (30) and the lower mold (40), characterized in that, It also includes a slide seat (50) and a slanted ejector (60). The slide seat (50) is slidably mounted on the lower mold (40). The slide seat (50) is provided with a conveying channel (51). The slide seat (50) is provided with a glue outlet (52) protruding towards the mold cavity (80). The glue outlet (52) is provided with a submerged glue channel (54). One end of the submerged glue channel (54) is connected to the conveying channel (51). The other end of the submerged glue channel (54) is provided with a glue outlet (55). The glue outlet (52) is provided with a slanted groove (53) at its end. The slanted groove (53) is located above the glue outlet (55). The lower mold (40) is provided with a connecting groove (41) that can communicate with the slanted groove (53). The inclined ejector (60) obliquely penetrates the lower mold (40) and can obliquely protrude upward from the mold cavity (80). The upper end of the inclined ejector (60) is recessed with a glue outlet groove (61) that can communicate with the glue outlet (55). In the mold-closed state, the slide seat (50) is located on one side of the mold cavity (80), the glue outlet groove (61) is located below the mold cavity (80), and the nozzle (11), the glue injection channel (31), the conveying channel (51), the submerged glue channel (54), the glue outlet groove (61), the inclined groove (53), the connecting groove (41), and the mold cavity (80) are connected and arranged in a continuous manner; After injection molding, the product (90) is formed in the mold cavity (80), and the connecting groove (41), the inclined groove (53), and the glue outlet groove (61) are formed together to form a submerged piece (100) connected to the product (90).

2. The injection mold for the submersible injection as described in claim 1, characterized in that, The inclined groove (53) has a first groove wall (531) and a second groove wall (532), the first groove wall (531) being an inclined surface and the second groove wall (532) being a vertical surface or an inclined surface.

3. The injection mold for the submersible injection as described in claim 2, characterized in that, The angle β between the first groove wall (531) and the horizontal plane is 15°~30°, and the second groove wall (532) is an inclined plane.

4. The injection mold for the submersible injection as described in claim 2, characterized in that, A first rounded corner structure (533) is provided at the connection between the first groove wall (531) and the second groove wall (532).

5. The injection mold for the submersible injection as described in claim 2, characterized in that, The connecting groove (41) has a third groove wall (42), which is in the same plane as the second groove wall (532).

6. The injection mold for the submersible injection as described in claim 1, characterized in that, The lower mold (40) has a connecting hole (43) that cooperates with the dispensing part (52) and an oblique guide hole (44) that cooperates with the oblique ejector (60). The connecting hole (43), the oblique guide hole (44), and the connecting groove (41) are connected.

7. The injection mold for the submersible injection as described in claim 1, characterized in that, The glue dispensing groove (61) has a protrusion (62) at the connection between its inner side wall and the upper surface of the inclined top member (60).

8. The injection mold for the submersible injection as described in claim 7, characterized in that, The protrusion (62) smoothly transitions to the inner wall of the glue outlet groove (61).

9. The injection mold for the submersible injection as described in claim 1, characterized in that, The inner wall of the dispensing groove (61) and the bottom wall are provided with a second rounded corner structure (63).

10. The injection mold for the submersible injection as described in claim 1, characterized in that, It also includes a ejector mechanism (70), which includes an ejector plate (71) connected to the inclined ejector (60) and used to drive the inclined ejector (60).

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