Pouring structure and injection mold

Abstract

The utility model discloses a pouring structure and an injection mold, the pouring structure comprises a pouring assembly, the pouring assembly comprises an upper mold core and a front mold ejection assembly, the front mold ejection assembly is detachably installed on the upper mold core, an RP plate insert is arranged above the upper mold core, and a pouring gate connecting insert is arranged in the front mold ejection assembly; and the lower mold core is arranged at the lower end of the upper mold core, a product cavity is formed in the lower mold core, and the lower end of the front mold ejection assembly and the product cavity are arranged in an up-down corresponding mode. According to the utility model, the outlet end of the pouring gate is arranged inside the front mold ejection assembly, after a product is formed, the pouring gate is firstly stripped, then the mold is opened, and the product is ejected through the front mold ejection assembly, so that the compatibility of the two structures of the pouring assembly and the front mold ejector plate is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic injection molds, in particular to a pouring structure and an injection mold. Background Art

[0002] Plastic injection molds are important tools for producing plastic products. They are used to manufacture plastic products of various shapes and sizes through the injection molding process. Injection molding is an efficient mass production method suitable for thermoplastics and some thermosetting plastics. During the injection molding process, plastic particles are first melted in a heated barrel and then injected into the mold under high pressure. The mold temperature has a significant impact on the intrinsic performance and apparent quality of the product. Different plastics have different flow and decomposition temperatures. During the injection process, the molten material is injected into the mold under great pressure to ensure that the mold cavity is completely filled and the complex details of the design are captured.

[0003] However, there are some problems with the existing technology: the pouring structure in the existing mold is a relatively common pouring structure, and the front mold ejector structure is also a conventional design structure. However, when a front mold ejector structure is required in small products, the pouring structure must be designed to avoid the front mold ejector plate area. Because the ejector plate is suspended for a certain distance, the pouring structure cannot be designed. There are certain limitations. Therefore, we propose a pouring structure and an injection mold. Utility Model Content

[0004] In response to the problems existing in the prior art, the purpose of the present invention is to provide a pouring structure and an injection mold. By arranging a front mold ejection assembly inside the upper mold core, the gate outlet end is arranged inside the front mold ejection assembly. After the product is formed, the gate is first peeled off, and then the mold is opened, and the product is ejected through the front mold ejection assembly, thereby achieving the compatibility of the two structures of the pouring assembly and the front mold ejector plate.

[0005] The utility model is realized in this way: the pouring structure comprises:

[0006] A pouring assembly, comprising an upper mold core and a front mold ejection assembly, wherein the front mold ejection assembly is detachably mounted on the upper mold core, an RP plate insert is provided above the upper mold core, and a gate connection insert is provided in the front mold ejection assembly;

[0007] The lower mold core is arranged at the lower end of the upper mold core, and the lower mold core is provided with a product cavity. The lower end of the front mold ejection assembly is arranged in upper and lower correspondence with the product cavity.

[0008] Optionally, the front mold ejection assembly includes an ejector plate, the ejector plate is provided with a pressure block, the pressure block is provided with multiple groups of fixing pins, and the gate connecting insert is provided on the pressure block.

[0009] Optionally, springs are provided at the four corners of the upper surface of the ejector plate, a front mold ejector block is slidably mounted on the middle of the pressure block, and the lower end of the front mold ejector block is arranged in upper and lower correspondence with the product cavity.

[0010] Optionally, reset pins are provided at four corners of the lower surface of the ejector plate, and one end of the reset pin is provided on the upper mold core.

[0011] Optionally, a second fixing block is provided on the lower surface of the ejector plate, and a first fixing block is provided on the upper surface of the ejector plate, and the second fixing block and the first fixing block are arranged in an upper and lower correspondence.

[0012] Optionally, the RP plate insert is arranged on the first fixed block, and gate guide holes are opened inside the RP plate insert, the first fixed block, the second fixed block and the ejector plate, and the gate guide holes are arranged corresponding to the product cavity.

[0013] Optionally, a gate placement groove is provided on the upper surface of the first fixed block, and a docking interface is provided in the middle of the RP plate insert, and the docking interface and the gate placement groove are arranged in correspondence with each other in the upper and lower parts.

[0014] Optionally, the upper mold core includes a module, a positioning groove is provided on the upper surface of the module, the ejector plate is arranged in the positioning groove, a mounting hole is provided on the lower surface of the inner wall of the positioning groove, and the lower end of the reset pin is arranged in the mounting hole.

[0015] An injection mold also includes an upper mold and a lower mold. A feed pipe is provided on the upper surface of the upper mold. The pouring assembly can be detachably installed in the lower mold. The feed pipe and the pouring assembly are arranged correspondingly.

[0016] Optionally, both the upper and lower surfaces of the lower mold are provided with mounting grooves, and the two sets of mounting grooves are of different sizes. The upper mold core is arranged in the mounting groove of the lower surface, and the RP plate insert is arranged in the mounting groove of the upper surface.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. Through the mutual cooperation of the upper mold core, the lower mold core and the front mold ejection assembly provided in the utility model, the gate outlet end is set inside the front mold ejection assembly. After the product is formed, the gate is first peeled off, and then the upper mold core and the lower mold core are opened to open the mold, and the product is ejected through the front mold ejection assembly, thereby achieving the compatibility of the two structures of the pouring assembly and the front mold ejector plate.

[0019] 2. The utility model is provided with a first fixing block and a second fixing block added to the ejector plate, with a gate connecting insert connected in the middle. The gate connecting insert passes through the ejector plate, and a gap of 0.1 mm is left between the ejector plate and the gate insert to leave a movable gap.

[0020] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram provided by the utility model;

[0022] Figure 2 This is a schematic diagram of the explosion of the pouring assembly and the mold provided by the utility model;

[0023] Figure 3 This is an exploded schematic diagram of the pouring assembly provided by the present invention;

[0024] Figure 4 This is a schematic diagram of the front mold ejection assembly provided by the utility model;

[0025] Figure 5 This is a schematic side cross-sectional view of the front mold ejection assembly provided by the present invention;

[0026] Figure 6 This is a schematic diagram of the upper die core provided by the utility model;

[0027] Figure 7 This is a schematic diagram of the first fixing block provided by the utility model.

[0028] In the figure: 1. Upper mold; 2. Lower mold; 3. Feed pipe; 4. Placement groove; 5. Casting assembly; 501. Upper mold core; 5011. Module; 5012. Positioning groove; 502. Front mold ejector assembly; 5021. Ejector plate; 5022. Pressure block; 5023. Spring; 5024. Front mold ejector block; 5025. Second fixed block; 503. First fixed block; 504. RP plate insert; 505. Reset pin; 6. Lower mold core; 7. Mounting groove; 8. Product cavity; 9. Gate guide hole; 10. Gate connecting insert; 11. Fixing pin; 12. Docking port. DETAILED DESCRIPTION

[0029] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0030] like Figures 1 to 7 As shown, the pouring structure provided by the embodiment of the present invention includes:

[0031] The pouring assembly 5 includes an upper mold core 501 and a front mold ejection assembly 502. The front mold ejection assembly 502 is detachably mounted on the upper mold core 501. An RP plate insert 504 is provided above the upper mold core 501. A gate connecting insert 10 is provided within the front mold ejection assembly 502. The lower mold core 6 is provided at the lower end of the upper mold core 501. The lower mold core 6 defines a product cavity 8. The lower end of the front mold ejection assembly 502 is disposed in an upper and lower correspondence with the product cavity 8.

[0032] Specifically, such as Figures 2 to 5 As shown, a front mold ejection assembly 502 is provided inside the upper mold core 501, and then a gate connecting insert 10 is connected. The gate is fixed in the upper mold core 501 through the gate connecting insert 10, and corresponds to the product cavity 8 on the surface of the lower mold core 6 up and down, so that when in use, the raw slurry flows into the product cavity 8 through the gate to complete the casting and molding. After molding, the gate is first peeled off, the upper mold core 501 and the lower mold core 6 are separated, and the mold is opened. At this time, the front mold ejection assembly 502 is used to push the product forward and eject the molded product from the upper mold core 501, thereby achieving the problem of compatibility of the two structures and the effect of convenient demoulding, thereby avoiding the problem of the product adhering to the upper mold core 501 after molding.

[0033] Furthermore, the front mold ejection assembly 502 includes an ejector plate 5021, which is provided with a pressure block 5022. The pressure block 5022 is provided with multiple sets of fixing pins 11, and the gate connection insert 10 is provided on the pressure block 5022; springs 5023 are provided at the four corners of the upper surface of the ejector plate 5021, and a front mold ejector block 5024 is slidably mounted in the middle of the pressure block 5022. The lower end of the front mold ejector block 5024 is arranged in a vertically corresponding manner to the product cavity 8;

[0034] Specifically, such as Figure 4 As shown, when the mold is opened, the spring 5023 provides elastic force to push up the ejector plate 5021. At this time, the front mold ejector block 5024 slides on the pressure block 5022 to eject the molded product from under the upper mold core 501, thereby achieving the effect of convenient demoulding.

[0035] Furthermore, reset pins 505 are provided at the four corners of the lower surface of the ejector plate 5021, and one end of the reset pin 505 is provided on the upper mold core 501;

[0036] Specifically, such as Figure 4 and Figure 6As shown, through the cooperation of multiple sets of reset pins 505, the ejector plate 5021 can be accurately positioned to maintain the position of the structure stable so that each injection cycle is accurate, ensuring that the size and weight of each product are consistent, avoiding the possibility that the manufactured products may affect the product quality and price due to dimensional deviations, and at the same time reducing the friction between the structures, thereby reducing the wear of the mold components and extending the service life.

[0037] Furthermore, a second fixing block 5025 is provided on the lower surface of the ejector plate 5021, and a first fixing block 503 is provided on the upper surface of the ejector plate 5021. The second fixing block 5025 and the first fixing block 503 are provided in a vertically corresponding manner.

[0038] Specifically, such as Figure 3 and Figure 4 As shown, a first fixing block 503 and a second fixing block 5025 are added to the ejector plate 5021, and a gate connecting insert 10 is connected in the middle. The gate connecting insert 10 passes through the ejector plate 5021, and the ejector plate 5021 and the gate insert are spaced 0.1 mm apart to leave a movable gap.

[0039] Furthermore, the RP plate insert 504 is disposed on the first fixing block 503. The RP plate insert 504, the first fixing block 503, the second fixing block 5025 and the ejector plate 5021 are all provided with a gate guide hole 9, which is arranged corresponding to the product cavity 8.

[0040] Specifically, such as Figure 5 As shown, the lower end of the gate passes through multiple groups of gate guide holes 9, so that the gate can connect multiple parts, and according to the above-mentioned ejector plate 5021 and the gate insert, there is a 0.1mm gap, which has a movable gap, so that when the front mold top block 5024 moves, it will not interfere with the gate, thereby achieving the effect that the two structures can be compatible.

[0041] According to the structure of the above-mentioned front mold ejection assembly 502, when installing it, first fix the second fixing block 5025 to the upper mold core 501 with screws, install the front mold ejection block 5024 from the front, install the reset pin 505 on the back, and then install the ejector plate 5021. Then, fix the front mold ejection block 5024 with the fixing pin 11, and then install the gate connecting insert 10. Then, tighten the ejector plate 5021 and the pressure block 5022 with screws, and then insert the spring 5023. Finally, install the first fixing block 503, and the overall assembly of the front mold ejection assembly 502 is completed. The structure is simple and easy to assemble, which greatly improves the convenience of use.

[0042] Furthermore, a gate placement groove 4 is provided on the upper surface of the first fixed block 503, and a docking port 12 is provided in the middle of the RP plate insert 504. The docking port 12 and the gate placement groove 4 are arranged in a vertically corresponding manner.

[0043] Specifically, such as Figure 7 As shown, the upper end of the gate contacts the inner wall of the gate placement groove 4 and is hidden. At this time, the RP plate insert 504 is fixed on the first fixed block 503, and there is no distance between the two, so as to avoid the situation where the distance after the gate is installed is short, which makes it easy for the slurry to adhere to the inside of the gate guide hole 9, causing blockage and affecting the discharge of materials.

[0044] Furthermore, the upper mold core 501 includes a module 5011, a positioning groove 5012 is formed on the upper surface of the module 5011, an ejector plate 5021 is disposed in the positioning groove 5012, a mounting hole is formed on the lower surface of the inner wall of the positioning groove 5012, and the lower end of the reset pin 505 is disposed in the mounting hole;

[0045] Specifically, such as Figure 6 As shown, through the positioning groove 5012 and the mounting hole, the ejector plate 5021 and one end of the reset pin 505 can be embedded in the module 5011 respectively to limit the ejector plate 5021, thereby ensuring that the ejector plate 5021 can be accurately aligned and maintained in the correct position, reducing the time and labor required for disassembly and assembly of the ejector plate 5021.

[0046] An injection mold, comprising an upper mold 1 and a lower mold 2, wherein a feed pipe 3 is provided on the upper surface of the upper mold 1, and a pouring assembly 5 is detachably mounted in the lower mold 2, wherein the feed pipe 3 and the pouring assembly 5 are arranged correspondingly;

[0047] Specifically, such as Figure 1 and Figure 2 The pouring assembly 5 is designed to be detachably installed in the lower mold 2, thereby achieving the effect of convenient disassembly and maintenance, and one end of the feeding pipe 3 is connected to the pouring assembly 5, and the feeding pipe 3 is used to feed the pouring assembly 5.

[0048] Furthermore, mounting grooves 7 are provided on both the upper and lower surfaces of the lower mold 2, and the two sets of mounting grooves 7 are of different sizes. The upper mold core 501 is disposed in the mounting groove 7 on the lower surface, and the RP plate insert 504 is disposed in the mounting groove 7 on the upper surface.

[0049] Specifically, such as Figure 2 As shown, by designing two sets of mounting grooves 7 of different sizes, the mounting grooves 7 on the upper surface are larger than the mounting grooves 7 on the lower surface, so that the RP plate insert 504 is installed in the mounting grooves 7 on the upper surface, and the upper mold core 501 is placed in the mounting grooves 7 on the lower surface, so that the RP plate insert 504 is connected to the upper mold core 501, which can effectively improve the firmness and facilitate positioning, thereby improving the convenience of installation.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The pouring structure is characterized by: include: A pouring assembly (5), the pouring assembly (5) comprising an upper mold core (501) and a front mold ejection assembly (502), the front mold ejection assembly (502) being detachably mounted on the upper mold core (501), an RP plate insert (504) being provided above the upper mold core (501), and a gate connection insert (10) being provided within the front mold ejection assembly (502); The lower mold core (6) is arranged at the lower end of the upper mold core (501), the lower mold core (6) is provided with a product cavity (8), and the lower end of the front mold ejection assembly (502) is arranged in upper and lower correspondence with the product cavity (8).

2. The pouring structure according to claim 1, characterized in that: The front mold ejection assembly (502) includes an ejector plate (5021), the ejector plate (5021) is provided with a pressing block (5022), a plurality of sets of fixing pins (11) are provided on the pressing block (5022), and the gate connecting insert (10) is provided on the pressing block (5022).

3. The pouring structure according to claim 2, characterized in that: Springs (5023) are provided at the four corners of the upper surface of the ejector plate (5021), a front mold ejector block (5024) is slidably mounted in the middle of the pressure block (5022), and the lower end of the front mold ejector block (5024) is arranged in upper and lower correspondence with the product cavity (8).

4. The pouring structure according to claim 3, characterized in that: Reset pins (505) are provided at the four corners of the lower surface of the ejector plate (5021), and one end of the reset pin (505) is provided on the upper mold core (501).

5. The pouring structure according to claim 4, characterized in that: The lower surface of the ejector plate (5021) is provided with a second fixing block (5025), and the upper surface of the ejector plate (5021) is provided with a first fixing block (503), and the second fixing block (5025) and the first fixing block (503) are arranged in a corresponding manner up and down.

6. The pouring structure according to claim 5, characterized in that: The RP plate insert (504) is arranged on the first fixed block (503), and the RP plate insert (504), the first fixed block (503), the second fixed block (5025) and the ejector plate (5021) are all provided with a gate guide hole (9), and the gate guide hole (9) is arranged corresponding to the product cavity (8).

7. The pouring structure according to claim 6, characterized in that: A gate placement groove (4) is provided on the upper surface of the first fixed block (503), and a docking port (12) is provided in the middle of the RP plate insert (504). The docking port (12) and the gate placement groove (4) are arranged in a vertically corresponding manner.

8. The pouring structure according to claim 7, characterized in that: The upper mold core (501) includes a module (5011), a positioning groove (5012) is provided on the upper surface of the module (5011), the ejector plate (5021) is arranged in the positioning groove (5012), a mounting hole is provided on the lower surface of the inner wall of the positioning groove (5012), and the lower end of the reset needle (505) is arranged in the mounting hole.

9. An injection mold, comprising the pouring structure according to any one of claims 1 to 8, characterized in that: It also includes an upper mold (1) and a lower mold (2), wherein a feed pipe (3) is provided on the upper surface of the upper mold (1), and the pouring assembly (5) is detachably installed in the lower mold (2), and the feed pipe (3) and the pouring assembly (5) are arranged correspondingly.

10. The injection mold according to claim 9, characterized in that: The upper and lower surfaces of the lower mold (2) are both provided with mounting grooves (7), and the two groups of mounting grooves (7) are of different sizes. The upper mold core (501) is arranged in the mounting groove (7) on the lower surface, and the RP plate insert (504) is arranged in the mounting groove (7) on the upper surface.

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