One-mold four-cavity plastic injection mold structure

Abstract

The utility model discloses a one-mold four-cavity plastic injection mold structure which comprises a lower mold block and an upper mold block, four lower annular forming cavities are formed in the edge of the top surface of the lower mold block, the upper mold block is pressed against the top surface of the lower mold block, and four upper annular forming cavities are formed in the bottom surface of the upper mold block; the lower annular forming cavities and the corresponding upper annular forming cavities form forming cavities; a central vertical through hole is formed in the top surface of the lower die block in the middle of the lower annular forming cavity, a lower central die block is inserted into the central vertical through hole in a sleeved mode, the outer side wall of the lower central die block is tightly attached to the inner side wall of the central vertical through hole, and a radial extending part is formed on the outer side wall of the bottom of the lower central die block; and the radial extension part is inserted into a groove formed in the inner side wall of the bottom end of the central vertical through hole in a sleeving manner. Four products can be injected at a time, the production efficiency is high, and meanwhile, each forming cavity corresponds to three injection molding feeding pipes for feeding, so that the feeding speed is high, the uniformity is good, and the injection molding effect is improved.

Description

Technical field:

[0001] The utility model relates to the technical field of injection molding equipment, and more specifically to a one-mold four-cavity plastic injection mold structure. Background technology:

[0002] In the existing annular plastic parts, such as Figure 5 As shown, it is generally made by injection molding. The existing mold can generally only inject one at a time, and the injection time is 150 seconds, which makes its efficiency very low and not suitable for mass production.

[0003] At the same time, the existing injection port generally discharges the material in the middle of the upper mold and then into the ring-shaped molding cavity, which has low molding efficiency and limited uniformity. Utility model content:

[0004] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a one-mold four-cavity plastic injection mold structure, which can inject four products at a time with high production efficiency. At the same time, each molding cavity corresponds to three injection molding feed pipes for feeding, so that the feeding speed is fast, the uniformity is good, and the injection molding effect is improved.

[0005] The solution of the utility model to solve the technical problem is:

[0006] A one-mold, four-cavity plastic injection mold structure, comprising a lower module and an upper module, wherein the top edge of the lower module is formed with four lower annular molding cavities, the top surface of the lower module is pressed against the upper module, and the bottom surface of the upper module is formed with four upper annular molding cavities, wherein the lower annular molding cavities and the corresponding upper annular molding cavities form a molding cavity;

[0007] A central vertical through hole is formed on the top surface of the lower module at the middle part of the lower annular forming cavity, the lower central module is inserted into the central vertical through hole, the outer side wall of the lower central module is tightly attached to the inner side wall of the central vertical through hole, and a radial extension is formed on the bottom outer side wall of the lower central module, and the radial extension is inserted into the groove formed on the inner side wall of the bottom end of the central vertical through hole.

[0008] A plurality of feed through holes are formed on the top surface of the upper annular molding cavity, the bottom of the injection molding feed tube is in the corresponding feed through hole, the outer side wall of the bottom of the injection molding feed tube is close to the inner side wall of the corresponding feed through hole, and the bottom discharge port of the injection molding feed tube is connected to the upper annular molding cavity, and all the feed through holes are evenly distributed on the top surface of the upper annular molding cavity with the central axis of the top surface of the upper annular molding cavity as the center.

[0009] The bottom surface of the edge of the lower annular forming cavity is formed with a plurality of vertical pushing holes, and the pushing rods are inserted into the vertical pushing holes, and the outer side walls of the pushing rods are tightly attached to the inner side walls of the corresponding vertical pushing holes.

[0010] The lower module is fixed on the lower template, the bottom surface of the lower central module is pressed against the top surface of the lower template, and the upper module is fixed on the upper template.

[0011] The beneficial effects of the utility model are:

[0012] It can inject four products at a time with high production efficiency. At the same time, each molding cavity corresponds to three injection molding feed pipes for feeding, which makes its feeding speed fast, uniform, and improves the injection molding effect. Description of the drawings:

[0013] Figure 1 It is a partial structural diagram of the entire mold structure installed in the utility model;

[0014] Figure 2 It is a partial cross-sectional view of the utility model;

[0015] Figure 3 This is a partial bottom view of the upper module;

[0016] Figure 4 yes Figure 2 A partial enlarged view of

[0017] Figure 5 It is a schematic diagram of the injection molded product of the utility model. Specific implementation method:

[0018] For example, see Figures 1 to 5 (In order to make other components of this embodiment clear, the section lines of all drawings are omitted) As shown, a one-mold four-cavity plastic injection mold structure includes a lower module 10 and an upper module 20. The top edge of the lower module 10 is formed with four lower annular molding cavities 11. The four lower annular molding cavities 11 are evenly distributed on the lower module 10 with the central axis of the lower module 10 as the center. The top surface of the lower module 10 is pressed against the upper module 20. Four upper annular molding cavities 21 are formed on the bottom surface of the upper module 20. The lower annular molding cavities 11 and the corresponding upper annular molding cavities 21 form a ring-shaped molding cavity;

[0019] A central vertical through-hole 12 is formed on the top surface of the lower module 10 in the middle of the lower annular molding cavity 11. A lower central module 130 is inserted into the central vertical through-hole 12. The outer wall of the lower central module 130 is closely attached to the inner wall of the central vertical through-hole 12. A radial extension 131 is formed on the bottom outer wall of the lower central module 130. The radial extension 131 is inserted into a groove formed on the bottom inner wall of the central vertical through-hole 12. The lower central module 130 is a detachable structure, so when it needs to be replaced or repaired and maintained, it can be replaced or repaired separately, without having to disassemble the entire lower module 10 for replacement or repair, thereby reducing the cost of repair and replacement.

[0020] A plurality of feed through holes are formed on the top surface of the upper annular molding cavity 21, and the bottom of the injection molding feed pipe 40 is in the corresponding feed through hole. The outer side wall of the bottom of the injection molding feed pipe 40 is tightly attached to the inner side wall of the corresponding feed through hole, and the bottom discharge port of the injection molding feed pipe 40 is connected to the upper annular molding cavity 21. All the feed through holes are evenly distributed on the top surface of the upper annular molding cavity 21 with the central axis of the top surface of the upper annular molding cavity as the center.

[0021] The bottom surface of the edge of the lower annular forming cavity 11 is formed with a plurality of vertical pushing holes 13 , in which the pushing rods 14 are inserted, and the outer side walls of the pushing rods 14 are in close contact with the inner side walls of the corresponding vertical pushing holes 13 .

[0022] The lower module 10 is fixed on the lower template 1 , the bottom surface of the lower center module is pressed against the top surface of the lower template 1 , and the upper module 20 is fixed on the upper template 2 .

[0023] The lower template 1 is fixed on the top surface of multiple support blocks fixed on the top surface of the mold base 30. Multiple guide columns 31 are fixed on the top surface of the mold base 30. The top surfaces of the guide columns 31 are fixed to the bottom surface of the lower template 1. The lifting plate 400 is inserted into all the guide columns 31. The bottom surface of the lifting plate 400 is pressed against the top surface of the mold base 30. A pushing cylinder is installed below the mold base 30. The end of the push rod of the pushing cylinder is inserted into the middle through hole of the mold base 30 and fixed to the bottom surface of the lifting plate 400.

[0024] An upper fixed plate 41 is fixed to the top surface of the lifting plate 400, and the bottom of the pushing rod 14 is inserted into the corresponding vertical through hole formed on the upper fixed plate 41. An annular groove is formed on the inner wall of the bottom end of the vertical through hole, and an annular radial extension portion 141 is formed on the outer wall of the bottom end of the pushing rod 14. The annular radial extension portion 141 is inserted into the annular groove.

[0025] When this embodiment is in use, it lowers the upper module 20 so that it presses against the top surface of the lower module 10 to achieve closure;

[0026] Then, the material is discharged through the bottom discharge port of all the injection molding feed pipes 40 to perform injection molding on the molding cavity. Since each molding cavity corresponds to three evenly distributed injection molding feed pipes 40, the injection molding speed is fast, the efficiency is high, and the injection molding uniformity is good. After completion, the upper module 20 is lifted and lifted by the lifting plate 400. The top of the push rod 14 is pushed out from the top of the vertical pushing hole 13 to push the injection molded part out to complete the unloading.

[0027] The above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the present invention, and the scope of patent protection of the present invention shall be defined by the claims.

Claims

1. A one-mold four-cavity plastic injection mold structure, comprising a lower mold block (10) and an upper mold block (20), characterized in that: Four lower annular molding cavities (11) are formed on the top edge of the lower module (10), the top surface of the lower module (10) is pressed against the upper module (20), and four upper annular molding cavities (21) are formed on the bottom surface of the upper module (20), and the lower annular molding cavities (11) and the corresponding upper annular molding cavities (21) form a molding cavity; A central vertical through hole (12) is formed on the top surface of the lower module (10) at the middle of the lower annular forming cavity (11), and the lower central module (130) is inserted into the central vertical through hole (12). The outer wall of the lower central module (130) is tightly attached to the inner wall of the central vertical through hole (12). A radial extension portion (131) is formed on the outer wall of the bottom of the lower central module (130), and the radial extension portion (131) is inserted into a groove formed on the inner wall of the bottom end of the central vertical through hole (12).

2. The one-mold four-cavity plastic injection mold structure according to claim 1, characterized in that: A plurality of feed holes are formed on the top surface of the upper annular molding cavity (21), the bottom of the injection molding feed pipe (40) is located in the corresponding feed hole, the bottom outer wall of the injection molding feed pipe (40) is in close contact with the inner wall of the corresponding feed hole, the bottom discharge port of the injection molding feed pipe (40) is in communication with the upper annular molding cavity (21), and all the feed holes are evenly distributed on the top surface of the upper annular molding cavity (21) with the middle axis of the top surface of the upper annular molding cavity () as the center.

3. The one-mold four-cavity plastic injection mold structure according to claim 1, characterized in that: The bottom surface of the edge of the lower annular forming cavity (11) is formed with a plurality of vertical pushing holes (13), and the pushing rod (14) is inserted into the vertical pushing hole (13), and the outer wall of the pushing rod (14) is tightly attached to the inner wall of the corresponding vertical pushing hole (13).

4. The one-mold four-cavity plastic injection mold structure according to claim 1, characterized in that: The lower module (10) is fixed on the lower template (1), the bottom surface of the lower center module () is pressed against the top surface of the lower template (1), and the upper module (20) is fixed on the upper template (2).

5. The one-mold four-cavity plastic injection mold structure according to claim 4, characterized in that: The lower template (1) is fixed on the top surface of multiple support blocks fixed on the top surface of the mold base (30), the top surface of the mold base (30) is fixed with multiple guide columns (31), the top surface of the guide columns (31) is fixed on the bottom surface of the lower template (1), the lifting plate (400) is inserted on all the guide columns (31), the bottom surface of the lifting plate (400) is pressed against the top surface of the mold base (30), the top surface of the lifting plate (400) is fixed with an upper fixed plate (41), the bottom of the push rod (14) is inserted into the corresponding vertical through hole formed on the upper fixed plate (41), the bottom inner wall of the vertical through hole is formed with an annular groove, the bottom outer wall of the push rod (14) is formed with an annular radial extension (141), and the annular radial extension (141) is inserted into the annular groove.

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