Multi-cavity injection mold

Abstract

The utility model relates to a multi-cavity injection mold which comprises a bottom mold and an upper mold, the upper end of the bottom mold and the lower end of the upper mold are both provided with a plurality of corresponding mold cavities, auxiliary molds are arranged in the mold cavities, and the corresponding positions of the bottom mold and the upper mold are both provided with runner grooves. A flow dividing pipe is fixedly arranged at the position, corresponding to the mold cavity, of the runner groove, an injection molding opening is formed in the position, corresponding to the runner groove, of one side of the bottom mold, and a connecting ring is arranged in the injection molding opening. The utility model relates to the technical field of multi-cavity injection molds. According to the multi-cavity injection mold, the auxiliary molds are detachably connected with the bottom mold and the upper mold, so that when the mold is used for a long time and a single auxiliary mold is damaged, the single auxiliary mold can be replaced to reduce the loss and scrap of the mold, and the effect of improving the practicability of the multi-cavity mold is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-cavity injection molds, in particular to a multi-cavity injection mold. Background Art

[0002] A multi-cavity injection mold is a mold with two or more cavities used in the injection molding production process. Injection molding refers to a method of obtaining a plastic molded product by heating and melting the raw material through an injection molding machine and injecting it into the mold cavity, and then cooling and solidifying it.

[0003] Chinese patent publication number CN220741977U discloses a multi-cavity injection mold, including a workbench, the top of which is fixedly connected to a plurality of guide rods, the top ends of the plurality of guide rods are fixedly connected to the same top plate, the bottom of the top plate is fixedly connected to two cylinders, the outsides of the plurality of guide rods are slidably connected to the same die, and the die is fixed to the cylinders, the top of the workbench is provided with a plurality of mold grooves, the inside of the workbench is provided with a return groove, the inside of the return groove is slidably connected to a return slide, and the top of the workbench is provided with two slide grooves.

[0004] Although the above patent can facilitate the removal of injection molded parts through the slider, return slide, and top frame;

[0005] However, since the mold cavities are all opened at the upper end of the workbench, the mold is prone to wear and tear to varying degrees during use. In the above-mentioned patent, if a single mold cavity is severely worn, the remaining mold cavities need to be scrapped at the same time, which easily causes mold wear and tear.

[0006] It is also difficult to dynamically increase or decrease the number of uses according to different usage environments, and its applicability is poor. Utility Model Content

[0007] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a multi-cavity injection mold to solve the technical problems mentioned in the above background technology.

[0008] The above technical objectives of the present invention are achieved through the following technical solutions:

[0009] A multi-cavity injection mold includes a bottom mold and an upper mold, wherein the upper end of the bottom mold and the lower end of the upper mold are each provided with a plurality of corresponding mold cavities, a sub-mold is provided inside the mold cavity, and corresponding positions of the bottom mold and the upper mold are each provided with a runner groove, a diverter pipe is fixedly provided at the position of the runner groove corresponding to the mold cavity, an injection port is provided on one side of the bottom mold at a position corresponding to the runner groove, and a connecting ring is provided inside the injection port.

[0010] Furthermore, the auxiliary mold includes a mold bottom shell and a mold upper cover. The mold bottom shell and the mold upper cover jointly form a mold with an inner cavity. Feeding holes are provided at positions corresponding to the shunt pipe on the mold bottom shell and the mold upper cover.

[0011] Furthermore, the auxiliary mold further includes a support block. The support block is solid and made of the same material as the bottom mold. A plugging rod is provided at a position on one side of the support block corresponding to the shunt pipe.

[0012] Furthermore, the inner lumen of the injection port is conical, and the tapered end of the lumen of the injection port faces the runner groove.

[0013] Furthermore, a number of connecting rings are provided, and their sizes decrease in sequence. The outer wall of the connecting ring fits against the inner pipe wall of the injection port.

[0014] Furthermore, a flange is fixedly provided on one side of the upper mold corresponding to the injection port. A positioning groove is provided at a position on the flange corresponding to the injection port.

[0015] In summary, the present utility model includes at least one of the following beneficial technical effects:

[0016] 1. For this multi-cavity injection mold, by using a detachable connection method between the auxiliary mold, the bottom mold, and the upper mold, when a single auxiliary mold is damaged after long-term use of the mold, the single auxiliary mold can be replaced to reduce the loss and scrapping of the mold, achieving the effect of improving the practicality of the multi-cavity mold.

[0017] 2. For this multi-cavity injection mold, when adjusting the number of mold cavities according to the usage scenario of the injection mold, the support block is installed inside the mold cavity, and the outer wall of the support block fits against the inner wall of the mold cavity. The plugging rod is inserted into the shunt pipe to achieve the effect of plugging the shunt pipe and reduce the injection loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of a multi-cavity injection mold of the present utility model.

[0020] Figure 2 It is an exploded view of the structure of a multi-cavity injection mold of the present utility model.

[0021] Figure 3 This is a cross-sectional view of a bottom mold of a multi-cavity injection mold of the present invention.

[0022] Figure 4 This is a structural schematic diagram of a first type of auxiliary mold of a multi-cavity injection mold of the utility model.

[0023] Figure 5 This is a structural schematic diagram of the second auxiliary mold of a multi-cavity injection mold of the utility model.

[0024] In the figure, 1. bottom mold; 2. upper mold; 3. mold cavity; 4. auxiliary mold; 411. mold bottom shell; 412. mold upper cover; 413. feed hole; 421. support block; 422. sealing rod; 5. runner groove; 6. diverter pipe; 7. injection port; 8. connecting ring; 9. flange; 10. positioning groove. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below with reference to the accompanying drawings.

[0026] Example:

[0027] Reference Figure 1-Figure 1 -5. The utility model discloses a multi-cavity injection mold, comprising a bottom mold 1 and an upper mold 2. The upper end of the bottom mold 1 and the lower end of the upper mold 2 are each provided with a plurality of corresponding mold cavities 3, and a sub-mold 4 is provided inside the mold cavity 3. The corresponding positions of the bottom mold 1 and the upper mold 2 are each provided with a runner groove 5, and the position of the runner groove 5 corresponding to the mold cavity 3 is fixedly provided with a diverter pipe 6. An injection port 7 is provided on one side of the bottom mold 1 at a position corresponding to the runner groove 5, and a connecting ring 8 is provided inside the injection port 7.

[0028] In this embodiment, the sub-mold 4 is installed inside the mold cavity 3. After the bottom mold 1 and the upper mold 2 are buckled together, the device forms a mold with multiple mold cavities 3. When the bottom mold 1 and the upper mold 2 are buckled together, the two runner grooves 5 are buckled together to form a complete injection runner. During injection, the injection is guided into the interior of each sub-mold 4 through the arrangement of the diverter pipe 6 to achieve the injection molding effect.

[0029] By installing different sub-molds 4 inside the mold cavity 3, the number of injection moldings can be adjusted according to the usage scenario, thereby achieving the effect of improving the applicability of the device;

[0030] Since the auxiliary mold 4 is detachably connected to the bottom mold 1 and the upper mold 2, when a single auxiliary mold 4 is damaged after long-term use of the mold, the single auxiliary mold 4 can be replaced to reduce the loss and scrapping of the mold, thereby improving the practicality of the multi-cavity mold.

[0031] In a further preferred embodiment of the present invention, Figure 1-5 As shown, there are two types of auxiliary molds 4. The first type of auxiliary mold 4 includes a mold bottom shell 411 and a mold upper cover 412. The mold bottom shell 411 and the mold upper cover 412 together constitute a mold with an inner cavity. The mold bottom shell 411 and the mold upper cover 412 are provided with a feed hole 413 at the position corresponding to the diversion pipe 6.

[0032] In this embodiment, when in use, the mold bottom shell 411 and the mold upper cover 412 are buckled together to form a mold with a single inner cavity, and the position of the feed hole 413 corresponds to the position of the diverter tube 6. At this time, during injection molding, the melted material enters the inner cavity formed by the mold bottom shell 411 and the mold upper cover 412 through the runner groove 5, the diverter tube 6 and the feed hole 413 to achieve the injection molding effect, and the mold bottom shell 411 and the mold upper cover 412 are respectively connected to the bottom mold 1 and the upper mold 2 by bolts.

[0033] In a further preferred embodiment of the present invention, Figure 1-5 As shown, there are two types of auxiliary molds 4. The second type of auxiliary mold 4 also includes a support block 421. The support block 421 is solid and made of the same material as the bottom mold 1. A sealing rod 422 is provided on one side of the support block 421 at a position corresponding to the diversion pipe 6.

[0034] In this embodiment, when the number of mold cavities 3 is adjusted according to the use scenario of the injection mold, the support block 421 is installed inside the mold cavity 3, and the outer wall of the support block 421 is in contact with the inner wall of the mold cavity 3, and the blocking rod 422 is inserted into the inside of the shunt tube 6 to achieve the effect of blocking the shunt tube 6, thereby achieving the purpose of reducing injection loss;

[0035] In order to prevent the injection from entering the mold cavity 3, the cavity wall of the mold cavity 3 is supported to prevent the cavity wall of the mold cavity 3 with a lower thickness from being deformed by heat, thereby achieving the effect of protecting the multi-cavity injection mold and effectively improving the service life of the multi-cavity injection mold.

[0036] In a further preferred embodiment of the present invention, Figure 1-5 As shown, the inner tube cavity of the injection port 7 is tapered, and the tapered end of the tube cavity of the injection port 7 faces the flow channel groove 5.

[0037] In this embodiment, since the total volume of the internal mold cavity 3 of the multi-cavity injection mold needs to be changed, the injection speed needs to be increased, so the injection port 7 needs to be interconnected with injection tubes of different thicknesses to achieve the purpose of improving the injection efficiency. Therefore, the setting of the injection port 7 with a tapered inner tube cavity is used to connect injection hot runners of different sizes to achieve the purpose of adjusting the injection speed.

[0038] In a further preferred embodiment of the present utility model, as Figure 1-5 shown, a plurality of connecting rings 8 are provided, and their sizes decrease in sequence. The outer wall of the connecting ring 8 is in fit with the inner pipe wall of the injection port 7.

[0039] In this embodiment, different connecting rings 8 are connected to injection pipes of different thicknesses. Since the outer walls of the respective connecting rings 8 are in fit with the inner pipe wall of the injection port 7, injection pipes of different thicknesses can be connected to the injection port 7, so as to achieve the effect that the multi-cavity injection mold can be applicable to injection pipes of different sizes, thereby achieving the effect of improving the applicability of the multi-cavity injection mold.

[0040] In a further preferred embodiment of the present utility model, as Figure 1-5 shown, a flange 9 is fixedly provided on one side of the upper mold 2 corresponding to the injection port 7, and a positioning groove 10 is formed at a position of the flange 9 corresponding to the injection port 7.

[0041] In this embodiment, the arrangement of the flange 9 and the positioning groove 10 facilitates the mutual correspondence of the bottom mold 1 and the upper mold 2, so as to achieve the effect of improving the stability of the bottom mold 1 and the upper mold 2 during use.

[0042] The embodiments of the present specific implementation manners are all preferred embodiments of the present utility model, and do not limit the protection scope of the present utility model accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model shall be covered within the protection scope of the present utility model.

Claims

1. A multi-cavity injection mold, characterized in that, It includes a bottom mold (1) and an upper mold (2). A number of corresponding mold cavities (3) are provided at the upper end of the bottom mold (1) and the lower end of the upper mold (2). A sub-mold (4) is arranged inside the mold cavity (3). Runner grooves (5) are provided at corresponding positions of the bottom mold (1) and the upper mold (2). A shunt pipe (6) is fixedly arranged at a position where the runner groove (5) corresponds to the mold cavity (3). An injection port (7) is arranged at a position on one side of the bottom mold (1) corresponding to the runner groove (5). A connecting ring (8) is arranged inside the injection port (7).

2. The multi-cavity injection mold according to claim 1, wherein, The sub-mold (4) includes a mold bottom shell (411) and a mold upper cover (412). The mold bottom shell (411) and the mold upper cover (412) jointly form a mold with an inner cavity. Feeding holes (413) are arranged at positions where the mold bottom shell (411) and the mold upper cover (412) correspond to the shunt pipe (6).

3. The multi-cavity injection mold according to claim 2, wherein The sub-mold (4) further includes a support block (421). The support block (421) is solid and made of the same material as the bottom mold (1). A plugging rod (422) is arranged at a position on one side of the support block (421) corresponding to the shunt pipe (6).

4. The multi-cavity injection mold according to claim 3, wherein, The inner lumen of the injection port (7) is conical, and the tapered end of the lumen of the injection port (7) faces the runner groove (5).

5. A multi-cavity injection mold according to claim 4, characterized in that, A number of connecting rings (8) are provided, and their sizes decrease in sequence. The outer wall of the connecting ring (8) fits against the inner pipe wall of the injection port (7).

6. The multi-cavity injection mold according to claim 5, characterized in that, A flange (9) is fixedly arranged on one side of the upper mold (2) corresponding to the injection port (7). A positioning groove (10) is provided at a position on the flange (9) corresponding to the injection port (7).

Images