CN211137958U

CN211137958U - Injection mold

Info

Publication number: CN211137958U
Application number: CN201921874024.4U
Authority: CN
Inventors: 李家强
Original assignee: Jiangmen Kk Plastic Factory Ltd
Current assignee: Jiangmen Kk Plastic Factory Ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-07-31
Anticipated expiration: 2029-10-31

Abstract

The utility model discloses an injection mold, include: the middle part of the lower side of the upper die is connected with an upper die insert; the lower die is connected to the lower side of the upper die, the middle of the lower die is connected with a lower die core, a left row position and a right row position, the left row position and the right row position are arranged on the left side and the right side of the lower die core and are connected to the lower die in a sliding mode, the left row position and the right row position are matched to surround the lower die core and form a cavity for forming a product on the periphery of the lower die core, the upper die insert is connected to the upper ends of the left row position and the right row position and seals the cavity, and an injection channel communicated with the cavity is arranged; the opening and closing assembly is used for driving the left row position and the right row position to move so as to open the cavity; the cutter assembly is provided with a rotating shaft and a driving mechanism, the rotating shaft is rotatably connected to the center of the lower die core, a cutter used for cutting off a water gap is arranged at the upper end of the rotating shaft, and the lower end of the rotating shaft is connected with the driving mechanism to realize rotation. Realize cutting the mouth of a river in the mould, reduced subsequent manufacturing procedure, improved product quality stability and yield.

Description

Injection mold

Technical Field

The utility model relates to the technical field of mold, in particular to injection mold with automatic cut mouth of a river in mould.

Background

Injection molding is currently the most common method of plastic molding. And (3) stirring the completely molten plastic material by the injection molding machine through a screw at a certain temperature, injecting the completely molten plastic material into a mold cavity of an injection mold by high pressure, and cooling and solidifying to obtain a plastic finished product. The injection molding machine has the advantages of high production speed, high efficiency, automation realization of operation, wide size range, accurate product size and the like, and the injection molding machine is suitable for the molding processing fields of mass production, products with complex shapes and the like.

In the injection molding process, a glue inlet is formed in the mold, and the glue inlet is communicated with the mold cavity and used for injecting molten plastic materials into the mold cavity. The molten plastic material enters the mold cavity to form a product, and the corresponding entry of the plastic material into the product is called a gate. After the injection molding is finished, a water gap is formed in the plastic finished product, the plastic finished product is taken out by opening the mold, the plastic finished product is connected with the water gap, and then the plastic finished product and the water gap are fixed on a special jig for cutting off waste materials. Referring to fig. 8, for a product 800 partially made of brittle plastics, due to the fact that glue is fed from the middle round hole 810, good surface effects cannot be obtained when a water gap is cut by manual machining, the water gap can only be cut by auxiliary cutting equipment, due to the fact that the product 800 is brittle, the product 800 is prone to bursting during cutting, certain instability exists in secondary machining, the yield of the product 800 cannot be guaranteed, and production cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an injection mold can cut the mouth of a river in the mould, simplifies manufacturing procedure.

According to the utility model discloses injection mold, include:

the middle part of the lower side of the upper die is connected with an upper die insert;

the lower die is connected to the lower side of the upper die, the middle of the lower die is connected with a lower die core, a left row position and a right row position, the left row position and the right row position are arranged on the left side and the right side of the lower die core and are connected to the lower die in a sliding mode, the left row position and the right row position are matched to surround the lower die core and form a cavity for forming a product on the periphery of the lower die core, the upper die insert is connected to the upper ends of the left row position and the right row position and seals the cavity, and an injection channel communicated with the cavity is arranged in the upper die insert;

the opening and closing assembly is used for driving the left row of bits and the right row of bits to move so as to open the cavity;

the cutter assembly is provided with a rotating shaft and a driving mechanism, the rotating shaft is rotatably connected with the center of the lower die cavity, a cutter used for cutting off a water gap is arranged at the upper end of the rotating shaft, and the lower end of the rotating shaft is connected with the driving mechanism to realize rotation.

According to the utility model discloses injection mold has following beneficial effect at least: molten plastic is injected into the cavity through the injection channel, then the driving mechanism drives the rotating shaft to rotate, the cutter is used for cutting the water gap in the mold, then the upper mold and the lower mold are separated, the opening and closing assembly drives the left slide and the right slide to move so as to open the cavity, and a molded product is taken out. Because the water cutting opening is realized in the die, the subsequent processing procedures are reduced, the mechanical water cutting product replaces the manual water cutting opening, and the stability and the reliability are far higher than those of manual operation, thereby improving the stability and the yield of the product quality, reducing the labor intensity of operators and reducing the production cost.

According to the utility model discloses a few embodiments, the cutter is two and the circumference equipartition is in the up end of pivot, two form the intercommunication between the cutter the runner of die cavity.

According to the utility model discloses a some embodiments, the lower terminal surface of going up the mould inserts is provided with the cushion of two circumference equipartitions, the cutter with the cushion staggers each other.

According to some embodiments of the utility model, actuating mechanism is including setting up rack in the lower mould, be connected with in the pivot with rack engaged with gear.

According to some embodiments of the utility model, be provided with two in the lower mould and be used for the installation the bearing of pivot, two the bearing is arranged the upper and lower both sides of gear.

According to the utility model discloses a some embodiments, the subassembly that opens and shuts including two connect in go up the oblique guide arm of mould, two oblique guide arm symmetrical arrangement in go up the left and right sides of mould inserts, a left side go the position with be provided with on the right side go the position with oblique guide arm complex guiding hole.

According to some embodiments of the utility model, the left side capable position with the lateral surface of right side capable position sets up to the conical surface, the downside of going up the mould be provided with conical surface complex interior taper hole.

According to some embodiments of the utility model, the downside of going up the mould still is provided with the guide block, the guide block is close to the side of right side capable position set up into with conical surface complex curved surface.

According to some embodiments of the utility model, be connected with the wear-resisting welt of detachable on the circular conical surface.

According to some embodiments of the utility model, the up end of lower mould is provided with the stripper plate, be provided with the connection in the lower mould the ejector pin of stripper plate, a left side line position with the right side line position is connected on the stripper plate, the stripper plate with lower mould benevolence sliding connection.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the mold opening state of the embodiment of the present invention;

FIG. 3 is a schematic structural view of a lower mold insert according to an embodiment of the present invention;

fig. 4 is a schematic structural view of an upper die insert in an embodiment of the present invention;

fig. 5 is a top view of the rotating shaft in the embodiment of the present invention;

FIG. 6 is a front view of the rotating shaft in the embodiment of the present invention;

fig. 7 is a left side view of the rotating shaft in the embodiment of the present invention;

fig. 8 is a cross-sectional view of a product 8 of brittle plastic.

The reference numbers are as follows:

the upper die 100, the upper die insert 110, the injection channel 111, the cushion block 112, the inclined guide rod 120, the inner taper hole 130 and the guide block 140;

the lower die comprises a lower die 200, a lower die core 210, a left moving position 220, a right moving position 230, a guide hole 231, a wear-resistant lining plate 232, a rotating shaft 240, a cutter 241, a rack 250, a gear 260, a bearing 270, a stripping plate 280 and a top rod 290;

product 800, round hole 810.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated, for example, up, down, left, right, etc., referred to the orientation description is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, according to the utility model discloses an injection mold includes: an upper mold insert 110 is connected to the middle of the lower side of the upper mold 100; the lower die 200 is connected to the lower side of the upper die 100, the middle of the lower die 200 is connected with a lower die core 210, a left traveling position 220 and a right traveling position 230, the left traveling position 220 and the right traveling position 230 are arranged on the left side and the right side of the lower die core 210 and are slidably connected to the lower die 200, the left traveling position 220 and the right traveling position 230 are matched to surround the lower die core 210 and form a cavity for molding a product on the periphery of the lower die core 210, the upper die insert 110 is connected to the upper ends of the left traveling position 220 and the right traveling position 230 and closes the cavity, and an injection channel 111 communicated with the cavity is arranged in the upper die; the opening and closing component is used for driving the left row position 220 and the right row position 230 to move so as to open the cavity; the cutter assembly has a rotating shaft 240 and a driving mechanism, the rotating shaft 240 is rotatably connected to the center of the lower mold core 210, it can be understood that a circular hole is formed in the center of the lower mold core 210, the rotating shaft 240 is a circular shaft and is installed in the circular hole, a cutter 241 for cutting off a water gap is arranged at the upper end of the rotating shaft 240, and the lower end of the rotating shaft 240 is connected to the driving mechanism to realize rotation. By adopting the structure, in the production process, molten plastic is injected into the cavity through the injection channel 111, then the driving mechanism drives the rotating shaft 240 to rotate, the rotating shaft 240 drives the cutter 241 to rotate, the cutter 241 cuts a water gap in the mold, then the upper mold 100 is separated from the lower mold 200, the opening and closing component drives the left traveling position 220 and the right traveling position 230 to move so as to open the cavity, and a molded product is taken out. Because the water cutting opening is realized in the die, the subsequent processing procedures are reduced, the mechanical water cutting product replaces the manual water cutting opening, and the stability and the reliability are far higher than those of manual operation, thereby improving the stability and the yield of the product quality, reducing the labor intensity of operators and reducing the production cost.

Referring to fig. 5 to 7, according to some embodiments of the present invention, the number of the cutters 241 is two and the circumferential uniform distribution is on the upper end surface of the rotating shaft 240, and a flow channel communicating the cavity is formed between the two cutters 241. The adoption of the two cutters 241 can improve the speed and uniformity of the water gap, reduce the section of the flow channel and facilitate rapid water gap cutting. Referring to fig. 5, it can be understood that the outer end of the cutting knife 241 (located at the periphery of the upper end surface of the rotating shaft 240) is a cutting edge that is curved towards the rotating direction of the rotating shaft 240 and is close to the runner, and when the rotating shaft 240 rotates, the cutting edge cuts into the plastic in the runner to complete the cutting of the nozzle.

Referring to fig. 4, according to some embodiments of the present invention, the lower end surface of the upper die insert 110 is provided with two circumferentially uniformly distributed pads 112, and the cutter 241 is staggered from the pads 112. Here, the pad 112 further reduces the cross-section of the flow passage, and the pad 112 cooperates with the cutter 241 to further increase the speed of the cutting gate.

Referring to fig. 1 and 2, according to some embodiments of the present invention, the driving mechanism includes a rack 250 disposed in the lower mold 200, and a gear 260 engaged with the rack 250 is connected to the rotating shaft 240. The rack 250 drives the gear 260 and the rotating shaft 240 to realize the action of the water cutting opening, and it can be understood that the rack 250 is connected with a power source, which can be a motor, an oil cylinder and the like.

Referring to fig. 1 and 2, according to some embodiments of the present invention, two bearings 270 for mounting the rotating shaft 240 are disposed in the lower mold 200, and the two bearings 270 are disposed on upper and lower sides of the gear 260. The two bearings 270 ensure that the rotating shaft 240 can rotate smoothly, and are respectively arranged at the upper side and the lower side of the gear 260, so that the rotating shaft 240 is stressed more uniformly and rotates more smoothly.

Referring to fig. 1 and 2, according to some embodiments of the present invention, the opening and closing assembly includes two inclined guide rods 120 connected to the upper mold 100, the two inclined guide rods 120 are symmetrically disposed at the left and right sides of the upper mold insert 110, and the left traveling part 220 and the right traveling part 230 are provided with guide holes 231 engaged with the inclined guide rods 120. The guide hole 231 of the left slide 220 and the left oblique guide 120 are not shown in the drawing, and when the upper die 100 leaves the lower die 200, the oblique guide 120 moves upwards, and the two oblique guide 120 push the left slide 220 and the right slide 230 outwards through the guide hole 231, so that the die opening is realized, and the structure is simple and reliable.

Referring to fig. 1 and 2, according to some embodiments of the present invention, the outer side surfaces of the left traveling unit 220 and the right traveling unit 230 are provided as conical surfaces, and the lower side of the upper mold 100 is provided with an inner tapered hole 130 engaged with the conical surfaces. The conical surfaces of the inner taper hole 130, which are matched with the left row position 220 and the right row position 230, are not only positioning structures, but also serve as guides in the process of opening and closing the die, so that the left row position 220 and the right row position 230 are accurately closed.

Referring to fig. 1 and 2, according to some embodiments of the present invention, the lower side of the upper mold 100 is further provided with a guide block 140, and a side of the guide block 140 close to the right slide 230 is provided as a curved surface matched with the conical surface. The guide block 140 is used for guiding the movement of the right row 230 during mold opening and closing, so as to ensure the accurate movement of the right row 230.

Referring to fig. 1 and 2, according to some embodiments of the present invention, a detachable wear liner 232 is attached to the conical surface. In order to reduce abrasion, wear-resistant lining plates 232 are arranged on the conical surface, and the wear-resistant lining plates 232 are fixed on the left slide 220 and the right slide 230 through screws, so that the assembly and disassembly are convenient.

According to some embodiments of the present invention, the upper end surface of the lower mold 200 is provided with a mold stripping plate 280, the lower mold 200 is provided with a top rod 290 connected to the mold stripping plate 280, the left-going position 220 and the right-going position 230 are connected to the mold stripping plate 280, and the mold stripping plate 280 is slidably connected to the lower mold core 210. During demolding, after the water gap is cut, the ejector pin 290 pushes the demolding plate 280 to move upwards, and the product 800 on the lower mold core 210 is ejected by the demolding plate 280, so that the product 800 is convenient to take away. It will be appreciated that ram 290 is connected to a power source such as a cylinder.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. An injection mold, comprising:

2. An injection mold according to claim 1, wherein the number of the cutters is two and the cutters are circumferentially and uniformly distributed on the upper end face of the rotating shaft, and a flow passage communicating with the cavity is formed between the two cutters.

3. An injection mold as claimed in claim 2, wherein the lower end surface of the upper mold insert is provided with two circumferentially equispaced spacers, and the cutter is staggered with respect to the spacers.

4. An injection mold according to claim 1, wherein the driving mechanism comprises a rack disposed in the lower mold, and a gear engaged with the rack is connected to the rotating shaft.

5. An injection mold as claimed in claim 4, wherein two bearings for mounting said rotating shaft are provided in said lower mold, and said two bearings are disposed on the upper and lower sides of said gear.

6. The injection mold according to claim 1, wherein the opening and closing assembly comprises two inclined guide rods connected to the upper mold, the two inclined guide rods are symmetrically arranged on the left side and the right side of the upper mold insert, and guide holes matched with the inclined guide rods are formed in the left row position and the right row position.

7. An injection mold according to claim 6, wherein the outer side surfaces of the left and right slide members are provided with conical surfaces, and the lower side of the upper mold member is provided with an inner tapered hole which is engaged with the conical surfaces.

8. An injection mold according to claim 7, wherein the lower side of the upper mold is further provided with a guide block, and the side surface of the guide block close to the right slide is provided with a curved surface matched with the conical surface.

9. An injection mould according to claim 7 or 8, wherein a removable wear liner is attached to the conical surface.

10. An injection mold according to claim 1, wherein a stripper plate is disposed on the upper end surface of the lower mold, a ram is disposed in the lower mold and connected to the stripper plate, the left and right rows are connected to the stripper plate, and the stripper plate is slidably connected to the lower mold core.