Inclined ejection rubber feeding mold

Abstract

The utility model discloses a pitched roof glue feeding mold which comprises a lower mold core and an upper mold core, the lower mold core is provided with a lower mold groove for installing a mold core insert, the part, protruding out of the upper surface of the lower mold core, of the mold core insert is contained in an upper mold groove formed in the upper mold core, the mold core insert is provided with a pitched roof hole in a penetrating mode, and a pitched roof is movably arranged in the pitched roof hole. The upper mold core, the lower mold core, the mold core insert and the top surface of the pitched roof jointly define a product cavity for forming a product, a cold runner is concavely arranged on one side surface of the pitched roof and is provided with a submarine gate and an inlet gate, the lower mold core is provided with a first hot runner, and the mold core insert is provided with a second hot runner communicated with the first hot runner; the submarine gate of the cold runner is communicated with the second hot runner, and the inlet gate is communicated with the product cavity, is positioned in the middle of the bottom surface of the product and is positioned on the non-appearance surface of the product.

Description

Technical Field

[0001] The utility model relates to the field of plastic product injection molding, in particular to an inclined top-injection mold. Background Art

[0002] Plastic products are increasingly used in people's lives, and people's requirements for the quality and appearance of plastic products are getting higher and higher. Injection molds form plastic products in the mold cavity by injecting glue into the mold cavity. Most of the existing glue injection methods use latent glue injection, that is, glue injection from one side of the product. Its structure is simple, but because its glue inlet is set on one side of the product, it leads to unbalanced glue flow, resulting in problems such as large and small head size differences in the product, as well as product size shrinkage and other undesirable phenomena.

[0003] Moreover, the existing mold glue injection method does not reserve a position for the gate due to structural design defects, resulting in uneven injection of the product glue and thin local glue. After injection molding, there will be poor appearance phenomena such as force marks around the product. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a slanted top glue injection mold which can effectively solve the problem of unbalanced glue injection flow length and poor appearance size.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a slanted top glue injection mold, including a lower mold core and an upper mold core, the lower mold core is provided with a lower mold groove for installing a mold core insert, the part of the mold core insert protruding out of the upper surface of the lower mold core is received in the upper mold groove provided in the upper mold core, the mold core insert is penetrated by a slanted top hole, the slanted top is movably arranged in the slanted top hole, the upper mold core, the lower mold core, the mold core insert and the top surface of the slanted top together form a product cavity for molding a product, a cold runner is recessed on one side of the slanted top, the cold runner has a submerged gate and an inlet gate, the lower mold core is provided with a first hot runner, the mold core insert is provided with a second hot runner connected to the first hot runner, the submerged gate of the cold runner is connected to the second hot runner, the inlet gate is connected to the product cavity, and the inlet gate is located in the middle of the bottom surface of the product and on the non-appearance surface of the product.

[0006] Furthermore, the inlet gate is connected to the cold runner in a fan-shaped gate.

[0007] Furthermore, the side surface of the cold runner recessed at the inclined top of the gate is trumpet-shaped.

[0008] Furthermore, a bottom wall of the groove of the inlet gate has an inclined surface extending from the cold runner toward the product cavity, and the inclined surface is set at an angle α with the top surface of the inclined top, and 90°>α≥60°.

[0009] Furthermore, the lower die core is provided with a positioning column protruding from the periphery of the lower die groove, and the upper die core is provided with a positioning hole for accommodating the positioning column.

[0010] Furthermore, a tilted ejector block is provided at the top of the tilted ejector, the cold runner is arranged on the side of the tilted ejector block, a sliding block is provided at the bottom of the tilted ejector, the tilted ejector glue feeding mold also includes an ejector plate and an tilted ejector seat installed on the ejector plate, the tilted ejector seat is provided with a sliding groove, and the sliding block of the tilted ejector is slidably arranged in the sliding groove of the tilted ejector seat.

[0011] Furthermore, the inclined ejection mold also includes an ejector pin, the lower end of which is mounted on the ejector plate, the upper surface of the lower mold core is recessed with a lower main flow channel connected to the first hot runner, the lower mold core is penetrated by a straight ejector hole connected to the lower main flow channel, and the upper end of the ejector pin is movably arranged in the straight ejector hole.

[0012] Furthermore, an upper main flow channel is recessed on the lower surface of the upper mold core corresponding to the lower main flow channel, and the upper main flow channel and the lower main flow channel together form the main flow channel.

[0013] Furthermore, the upper mold core is penetrated by a glue feed channel connected to the upper main flow channel, and the glue feed channel is connected to the glue injection port of the glue feed unit.

[0014] Furthermore, the inclined top glue injection mold also includes a lower mold base and an upper mold base, the lower mold base is provided with a lower mold core groove for installing the lower mold core, the upper mold base is provided with an upper mold core groove for installing the upper mold core, and the glue injection unit is installed on the upper mold base.

[0015] The inclined top glue injection mold provided by the utility model not only solves the problem of poor appearance size caused by unbalanced glue injection flow length, but also reduces the generation of imprint marks on the product appearance, thereby greatly improving the product yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a three-dimensional diagram of the oblique injection molding die of the utility model.

[0018] Figure 2 for Figure 1 The top view of the inclined ejection mold is shown.

[0019] Figure 3 for Figure 2 The cross-sectional view of the inclined ejection mold along section AA is shown.

[0020] Figure 4 for Figure 1 A three-dimensional view of the partial structure of the inclined injection molding mold is shown.

[0021] Figure 5 for Figure 4 The three-dimensional exploded view of the inclined ejection mold is shown.

[0022] Figure 6 for Figure 4 A three-dimensional view of the partial structure of the inclined injection molding mold is shown.

[0023] Figure 7 It is a three-dimensional diagram of the inclined roof of the utility model.

[0024] Figure 8 for Figure 7 A top view of the inclined roof is shown.

[0025] Fig. 9 for Figure 8 The cross-sectional view of the inclined roof along section BB is shown.

[0026] Fig.10 for Fig. 9 The enlarged view of the part with the inclined top located at C is shown.

[0027] Fig.11 It is a three-dimensional diagram of the upper mold core of the utility model.

[0028] Fig.12 It is a three-dimensional diagram of the lower mold core of the utility model.

[0029] Fig.13 It is a three-dimensional diagram of the mold core insert of the present utility model.

[0030] Fig.14 It is a schematic diagram of the product, nozzle material and inclined top of the utility model. DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of description and simplified description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0033] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0034] See also Figure 1-Figure 14 The utility model discloses an inclined top injection mold for injection molding a product 100. In this embodiment, the product 100 includes a bottom plate and side plates extending downward from the edges of the bottom plate and connected to each other, and the bottom plate and the side plates together form a cylindrical structure with an opening facing downward.

[0035] See also Figure 4-Figure 6 , Figure 11-13 The inclined top-plastic injection mold includes a lower mold core 30 and an upper mold core 40. The lower mold core 30 is provided with a lower mold groove 31 for installing a mold core insert 50. The mold core insert 50 protrudes out of the upper surface of the lower mold core 30 and is received in the upper mold groove 41 provided in the upper mold core 40. The mold core insert 50 is penetrated and provided with an inclined top hole 51. The inclined top-plastic injection mold also includes an inclined top 70, which is movably arranged in the inclined top hole 51. The upper mold core 40, the lower mold core 30, the mold core insert 50 and the top surface 715 of the inclined top 70 together form a mold for molding product 1. 00 product cavity, a cold runner 711 is recessed on one side of the inclined top 70, the cold runner 711 has a submerged gate 712 and an inlet gate 713, the lower mold core 30 is provided with a first hot runner 33, the mold core insert 50 is provided with a second hot runner 52 connected to the first hot runner 33, the submerged gate 712 of the cold runner 711 is connected to the second hot runner 52, the inlet gate 713 is connected to the product cavity, and the inlet gate 713 is located in the middle of the bottom surface of the bottom plate of the product 100 and on the non-appearance surface of the product 100.

[0036] See also Figure 3 and Fig.14The utility model injects glue from the center of the bottom surface of the bottom plate of the product 100, so that the flow path from the injection center to the edges of the bottom plate of the product 100 is relatively close, which solves the problem of product defects such as different sizes at both ends of the product 100 caused by unbalanced injection flow length, and can use smaller injection pressure and holding pressure to effectively reduce the generation of printing marks.

[0037] See also Figure 7 and Figure 8 The inlet gate 713 is connected to the cold runner 711 in a fan-shaped gate. Through the fan-shaped connection setting, the glue in the cold runner 711 is evenly and smoothly injected into and fills the product cavity through the change of the cross-sectional area, which can effectively solve the problem of deformation of the product 100.

[0038] See also Figure 8-Figure 10 The gate 713 is recessed in the sloping top 70, and the side of the cold runner 711 is trumpet-shaped. The trumpet-shaped structure is adopted in this embodiment to adapt to more products. Combined with the use of a sloping top to inject glue, the injection pressure and speed are reduced, which can prevent the glue from generating vortices in the product cavity, thereby avoiding water marks on the surface of the product 100, peripheral print marks and other appearance problems.

[0039] Furthermore, the bottom wall of the groove of the inlet gate 713 extends from the cold runner 711 to the product cavity with an inclined surface 714, and the inclined surface 714 is set at an angle α with the top surface 715 of the inclined top 70, and 90°>α≥60°. In this embodiment, the setting angle of the angle α is determined according to the area of ​​the bottom plate of the product 100. Generally, when the area of ​​the bottom plate of the product 100 is small, such as a Bluetooth headset shell, the angle α is usually set to 60° or 65°; when the area of ​​the bottom plate of the product 100 is large, such as a tablet computer shell, the angle α is usually set to 75° or 80°; when the area of ​​the bottom plate of the product 100 is particularly large, such as a TV shell, the angle α is usually set to 85°.

[0040] See also Fig.11 and Fig.12 The lower die core 30 is provided with a positioning column 34 protruding from the periphery of the lower die groove 31 , and the upper die core 40 is provided with a positioning hole 44 for accommodating the positioning column 34 .

[0041] See also Figure 5 , Figure 7 and Figure 8The top of the inclined ejector 70 is provided with an inclined ejector block 71, the cold runner 711 is arranged on the side of the inclined ejector block 71, the bottom of the inclined ejector 70 is provided with a sliding block 72, the inclined ejector injection mold also includes an ejector plate 60 and an inclined ejector seat 80 installed on the ejector plate 60, the inclined ejector seat 80 is provided with a sliding groove 81, and the sliding block 72 of the inclined ejector 70 is slidably arranged in the sliding groove 81 of the inclined ejector seat 80.

[0042] Please continue reading Figure 3 , Fig.11 and Fig.12 The oblique ejection mold further includes an ejector pin 90, the lower end of which is mounted on the ejector plate 60. The upper surface of the lower mold core 30 is provided with a lower main flow channel 32 connected to the first hot runner 33. The lower mold core 30 is provided with a straight ejection hole connected to the lower main flow channel 32, and the upper end of the ejector pin 90 is movably arranged in the straight ejection hole. The lower surface of the upper mold core 40 is provided with an upper main flow channel 43 corresponding to the lower main flow channel 32, and the upper main flow channel 43 and the lower main flow channel 32 together form a main flow channel.

[0043] See also Figure 1-Figure 3 The upper mold core 40 is penetrated by a glue feeding channel 42 connected to the upper main flow channel 43 , and the glue feeding channel 42 is connected to the glue injection port 22 of the glue feeding unit 21 .

[0044] Please continue reading Figure 1 and Figure 3 The inclined top glue injection mold also includes a lower mold base 10 and an upper mold base 20. The lower mold base 10 is provided with a lower mold core groove for installing the lower mold core 30, and the upper mold base 20 is provided with an upper mold core groove for installing the upper mold core 40. The glue injection unit 21 is installed on the upper mold base 20.

[0045] Furthermore, the inclined ejector mold also includes an upper mounting plate, a lower mounting plate and a pair of lower support blocks, wherein the upper mounting plate, the upper mold base 20, the lower mold base 10, a pair of lower support blocks and the lower mounting plate are arranged in sequence from top to bottom, and the pair of lower support blocks are arranged side by side and spaced apart between the lower mold base 10 and the lower mounting plate in the transverse direction. The ejector plate 60 is movably arranged between the lower mold base 10 and the lower mounting plate in the vertical direction, and is located between the pair of support blocks in the transverse direction. A return spring is provided between the lower mold base 10 and the ejector plate 60. The glue feeding unit 21 is mounted on the upper mounting plate, and the glue injection port 22 of the glue feeding unit 21 passes through the upper mold base 20 and is connected to the glue feeding channel 42.

[0046] See also Figure 5 , Fig.11 and Fig.12In this embodiment, the inclined ejector mold includes a pair of inclined ejectors 70, a pair of mold core inserts 50, and a pair of inclined ejector seats 80. The lower mold core 30 is provided with a pair of lower mold grooves 31 for installing a pair of mold core inserts 50, and the upper mold core 40 is correspondingly provided with a pair of upper mold grooves 41.

[0047] When the utility model is used:

[0048] When the inclined ejector mold changes from a mold closing state to an open mold state, the upper mold plate drives the upper mold base 20 to move away from the lower mold plate and the lower mold base 10, and the ejector plate 60 pushes the ejector pin 90 and the inclined ejector seat 80 to move upward, and the sliding block 72 of the inclined ejector 70 slides along the sliding groove 81 of the inclined ejector seat 80, and the inclined ejector 70 produces an upward and outward displacement, that is, the inclined ejector block 71 of the inclined ejector 70 ejects the product 100 upward, and the inclined ejector 70 moves outward to separate the nozzle material 200 from the cold runner 711, and at the same time, the ejector pin 90 synchronously pushes the nozzle material 200 upward to make the nozzle material 200 and the product 100 move upward synchronously, and demoulding is completed at this time;

[0049] When the inclined ejector mold changes from an open mold state to a closed mold state, the upper mold plate drives the upper mold base 20 to move toward the lower mold plate and the lower mold base 10, and the return spring restores the elastic force to push the ejector plate 60 to reset. At the same time, the ejector plate 60 drives the ejector pin 90 and the inclined ejector seat 80 to move toward each other so that the upper end of the ejector pin 90 is retracted into the ejector hole, the inclined ejector 70 moves downward and inward, and the inclined ejector block 71 is retracted into the inclined ejector hole 51. At the same time, the upper mold core 40 and the The lower mold core 30, the mold core insert 50 and the top surface 715 of the inclined top 70 form the product cavity, and the glue is injected through the glue injection port 22 of the glue feeding unit 21 via the glue feeding channel 42. The glue flows through the main channel formed by the upper main channel 43 and the lower main channel 32 and enters the first hot runner 33 and the second hot runner 52, enters the cold runner 711 from the submerged gate 712, and then is injected into the product cavity from the gate 713 to complete the injection molding of the product 100.

[0050] The inclined top glue injection mold provided by the utility model not only solves the problem of poor appearance size caused by unbalanced glue injection flow length, but also reduces the generation of imprint marks on the product appearance, thereby greatly improving the product yield rate.

[0051] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A slanted top-feeding mold, characterized in that: The invention comprises a lower mold core (30) and an upper mold core (40), wherein the lower mold core (30) is provided with a lower mold groove (31) for installing a mold core insert (50), the mold core insert (50) protruding from the upper surface of the lower mold core (30) is received in the upper mold groove (41) provided in the upper mold core (40), the mold core insert (50) is provided with an inclined top hole (51) extending through the mold core insert (50), the inclined top (70) is movably arranged in the inclined top hole (51), the upper mold core (40), the lower mold core (30), the mold core insert (50) and the top surface (715) of the inclined top (70) together form a product cavity for molding a product (100), the A cold runner (711) is recessed on one side of the inclined top (70), and the cold runner (711) has a submerged gate (712) and an inlet gate (713); the lower mold core (30) is provided with a first hot runner (33); the mold core insert (50) is provided with a second hot runner (52) connected to the first hot runner (33); the submerged gate (712) of the cold runner (711) is connected to the second hot runner (52); the inlet gate (713) is connected to the product cavity; the inlet gate (713) is located in the middle of the bottom surface of the product (100) and on the non-appearance surface of the product (100).

2. The oblique top-feeding mold according to claim 1, characterized in that: The inlet gate (713) is connected to the cold runner (711) in a fan-shaped gate.

3. The oblique top-feeding mold according to claim 2, characterized in that: The gate (713) is recessed on the inclined top (70) and the side surface of the cold runner (711) is in a trumpet shape.

4. The oblique top-feeding mold according to claim 3, characterized in that: The bottom wall of the groove of the inlet gate (713) is provided with an inclined surface (714) extending from the cold runner (711) toward the product cavity, and the inclined surface (714) and the top surface (715) of the inclined top (70) are arranged at an angle α, and 90°>α≥60°.

5. The oblique top-feeding mold according to claim 1, characterized in that: The lower mold core (30) is provided with a positioning column (34) protruding from the periphery of the lower mold groove (31), and the upper mold core (40) is provided with a positioning hole (44) for accommodating the positioning column (34).

6. The inclined top-feeding mold according to any one of claims 1 to 5, characterized in that: The top of the inclined top (70) is provided with an inclined top block (71), the cold runner (711) is arranged on the side of the inclined top block (71), the bottom of the inclined top (70) is provided with a sliding block (72), the inclined top injection mold also includes an ejector plate (60) and an inclined top seat (80) installed on the ejector plate (60), the inclined top seat (80) is provided with a sliding groove (81), and the sliding block (72) of the inclined top (70) is slidably arranged in the sliding groove (81) of the inclined top seat (80).

7. The oblique top-feeding mold according to claim 6, characterized in that: The inclined ejector mold also includes an ejector pin (90), the lower end of which is mounted on the ejector plate (60), the upper surface of the lower mold core (30) is recessed with a lower main flow channel (32) connected to the first hot runner (33), the lower mold core (30) is penetrated by a straight ejector hole connected to the lower main flow channel (32), and the upper end of the ejector pin (90) is movably arranged in the straight ejector hole.

8. The oblique top-feeding mold according to claim 7, characterized in that: An upper main channel (43) is recessed on the lower surface of the upper mold core (40) corresponding to the lower main channel (32), and the upper main channel (43) and the lower main channel (32) together form the main channel.

9. The oblique top-feeding mold according to claim 8, characterized in that: The upper mold core (40) is provided with a glue feed channel (42) communicating with the upper main flow channel (43), and the glue feed channel (42) is communicated with the glue injection port (22) of the glue feed unit (21).

10. The oblique top-feeding mold according to claim 9, characterized in that: The inclined top glue injection mold also includes a lower mold base (10) and an upper mold base (20), the lower mold base (10) is provided with a lower mold core groove for installing the lower mold core (30), the upper mold base (20) is provided with an upper mold core groove for installing the upper mold core (40), and the glue injection unit (21) is installed on the upper mold base (20).

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