CN221937414U - Double-injection molding structure for thick-wall cover - Google Patents

Abstract

The utility model relates to the field of plastic molds and discloses a double-injection molding structure of a thick-wall cover, which comprises a mounting base, wherein the front end and the rear end of the upper surface of the mounting base are fixedly connected with two guide rails, one end of the upper surface of the mounting base is provided with a first-injection mold fixed die, the other end of the upper surface of the mounting base is fixedly connected with a second-injection mold fixed die, one side of the first-injection mold fixed die and one side of the second-injection mold fixed die are respectively provided with a mold movable die, and an automatic demolding device is arranged in the mold movable die.

Description

Thick wall cover double shot molding structure

Technical Field

The utility model relates to the field of plastic molds, in particular to a double-injection molding structure for a thick-walled cover.

Background Art

A mold is a tool used to produce products with specific shapes and sizes. The mold usually consists of two or more half molds, each of which has a shape and size opposite to the desired product. Plastic, metal or other materials are injected or pressed into the mold to form the desired product. Among them, the thick-walled cover double-injection molding structure is a mold structure used to produce plastic products with thick-walled parts. This structure usually includes two or more injection parts, each of which is used to produce a different part of the product, which improves production efficiency. In addition, since there is more plastic material in the thick-walled part, a more solid, durable and reliable product can be obtained.

The molded products in the thick-walled cover double-shot molding structure usually need to be removed from the mold, which may cause damage or impact to the mold and the molded products, especially for some molded products with complex shapes or small parts, which are more difficult to remove. For this reason, we proposed the thick-walled cover double-shot molding structure.

Utility Model Content

In view of the deficiencies in the prior art, the utility model provides a double-injection molding structure for a thick-walled cover, which solves the above-mentioned problems.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-shot molding structure of a thick-walled cover, comprising a mounting base, wherein two guide rails are fixedly connected to the front and rear ends of the upper surface of the mounting base, a first-shot mold fixed mold is provided at one end of the upper surface of the mounting base, and a second-shot mold fixed mold is fixedly connected to the other end of the upper surface of the mounting base, a mold movable mold is provided between the two guide rails corresponding to one side of the first-shot mold fixed mold and the second-shot mold fixed mold, and an automatic demolding device is provided inside the mold movable mold.

Preferably, a threaded rod slot is provided on one side of the mold movable die, a plurality of through grooves distributed in an annular shape are provided on one side of the mold movable die, and extrusion rings are fixedly connected to the ports of the mold movable die corresponding to the plurality of through grooves.

Preferably, one end of the long threaded rod is fixedly inserted on one side of the movable mold of the mold, and an inner cavity groove is provided in the inner cavity of the fixed mold of the two-shot mold. The inner cavity groove is connected to the threaded rod slot and the through groove in the movable mold of the mold, and a long threaded rod is movably inserted in the threaded rod slot.

Preferably, the inner cavity groove is composed of a central annular cavity and a plurality of small annular cavities connected around it.

Preferably, the automatic demoulding device includes a pressing rod, a follower gear, a threaded sleeve and a driving gear. The long threaded rod is threadedly connected to a threaded sleeve in the corresponding inner cavity groove, and the side of the threaded sleeve is fixedly connected to the driving gear. A pressing rod is movably inserted in the through groove of the movable mold of the mold, and a follower gear is fixedly connected to the corresponding inner cavity groove on the pressing rod. The follower gears are meshed with the driving gear, and the surface of the follower gear is an inclined tooth.

Preferably, a motor is provided in the inner cavity of the movable mold of the mold, a rotating part is fixedly connected to the rotating shaft of the motor, and the rotating part is connected to the threaded sleeve through a transmission belt. A plurality of cavities are opened on the side of the fixed mold of the two-shot mold close to the movable mold of the mold, and one end of the press rod is movably inserted in the cavity.

Compared with the prior art, the utility model provides a double-shot molding structure for thick-walled covers, which has the following beneficial effects:

The double-shot molding structure of the thick-walled cover can automatically demould multiple molds after the first-shot and second-shot molds are molded through an automatic demoulding device, thereby avoiding damage or impact on the molds and molded products when demolding some molded products with complex shapes or small parts.

The double-shot molding structure of the thick-walled cover can demould multiple molds at one time, and can automatically reset after demoulding, thereby improving production efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the structure of the utility model;

Figure 2 is a schematic diagram of the movable mold of the utility model;

Figure 3 is a schematic cross-sectional view of the inner cavity groove of the utility model;

FIG4 is a schematic cross-sectional view of a movable mold of the utility model;

Figure 5 is a schematic diagram of the automatic demoulding device of the utility model;

FIG. 6 is a schematic diagram of a fixed mold of a two-shot mold of the present invention.

In the figure: 1. Mounting base; 2. Guide rail; 3. Fixed mold of one-shot mold; 4. Fixed mold of two-shot mold; 5. Moving mold of mold; 6. Extrusion ring; 7. Threaded rod slot; 8. Pressing rod; 9. Follower gear; 10. Long threaded rod; 11. Threaded sleeve; 12. Driving gear; 13. Motor; 14. Rotating part; 15. Cavity; 16. Automatic demoulding device; 17. Inner cavity groove.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Please refer to Figures 1-6, the thick-walled cover double-shot molding structure includes a mounting base 1, two guide rails 2 are fixedly connected to the front and rear ends of the upper surface of the mounting base 1, a single-shot mold fixed mold 3 is provided at one end of the upper surface of the mounting base 1, and a two-shot mold fixed mold 4 is fixedly connected to the other end of the upper surface of the mounting base 1, a mold movable mold 5 is provided between the two guide rails 2 on one side of the single-shot mold fixed mold 3 and the two-shot mold fixed mold 4, and an automatic demolding device 16 is provided inside the mold movable mold 5.

Furthermore, a threaded rod slot 7 is provided on one side of the mold movable mold 5 , and a plurality of through grooves distributed in an annular shape are provided on one side of the mold movable mold 5 , and extrusion rings 6 are fixedly connected to the ports of the mold movable mold 5 corresponding to the plurality of through grooves.

Furthermore, one end of the long threaded rod 10 is fixedly inserted on one side of the mold movable mold 5, and an inner cavity groove 17 is provided in the inner cavity of the two-shot mold fixed mold 4. The inner cavity groove 17 is connected to the threaded rod slot 7 and the through groove in the mold movable mold 5, and the long threaded rod 10 is movably inserted in the threaded rod slot 7.

Furthermore, the inner cavity groove 17 is composed of a central annular cavity and a plurality of small annular cavities connected to each other around it.

Furthermore, the automatic demoulding device 16 includes a pressing rod 8, a follower gear 9, a threaded sleeve 11 and a driving gear 12. The long threaded rod 10 is threadedly connected with the threaded sleeve 11 in the corresponding inner cavity groove 17, and the side of the threaded sleeve 11 is fixedly connected with the driving gear 12. The pressing rod 8 is movably inserted in the through groove of the movable mold 5, and the follower gear 9 is fixedly connected in the corresponding inner cavity groove 17 on the pressing rod 8. The follower gear 9 is meshed with the driving gear 12, and the surface of the follower gear 9 has inclined teeth.

Furthermore, a motor 13 is provided in the inner cavity of the movable mold 5, and a rotating member 14 is fixedly connected to the rotating shaft of the motor 13. The rotating member 14 is connected to the threaded sleeve 11 through a transmission belt. A plurality of cavities 15 are opened on the side of the fixed mold 4 of the two-shot mold close to the movable mold 5, and one end of the pressing rod 8 is movably inserted in the cavity 15.

Working principle: When the device is performing injection molding, the fixed mold 3 of the first-shot mold and the fixed mold 4 of the second-shot mold are both fitted with their corresponding movable molds 5. When the device performs double-shot molding on the thick-walled cover, the first shot is molded through the fixed mold 3 of the first-shot mold. After the mold is molded and cooled, the motor 13 in the movable mold 5 that is fitted with the fixed mold 3 of the first-shot mold is turned on, and the rotating shaft of the motor 13 drives the rotating member 14 to start rotating. The rotation of the rotating member 14 drives the threaded sleeve 11 to rotate through the transmission belt. The rotation of the threaded sleeve 11 drives the driving gear 12 fixedly connected to the threaded sleeve 11 to rotate on the one hand, and the rotation of the driving gear 12 drives multiple follower gears 9 meshing with the driving gear 12 to rotate. The inclined teeth on the surface of the follower gear 9 rotate on the driving gear 12, so that the follower gear 9 moves away from the fixed mold 3 of the first-shot mold on the side of the driving gear 12 while rotating. The movement of the wheel 9 drives the pressing rod 8 to move away from the fixed die 3 of the first-shot mold. When the pressing rod 8 shrinks toward the inside of the movable die 5 of the mold, the mold cooled and formed at one end of the pressing rod 8 is squeezed by the extrusion ring 6, so that the first-shot mold falls off, achieving the demoulding effect; on the other hand, the rotation of the threaded sleeve 11 will cause the threaded sleeve 11 to move away from the fixed die 3 of the first-shot mold on the long threaded rod 10, and the movement of the threaded sleeve 11 will drive the driving gear 12 on the surface to move together. Since the driving gear 12 is stuck in the inner cavity groove 17, the driving gear 12 will squeeze the inner wall of the inner cavity groove 17, thereby driving the movable die 5 of the mold to move away from the fixed die 3 of the first-shot mold between the two guide rails 2, thereby leaving a falling space for the mold after demoulding; after the first-shot mold is formed, the mold is placed on the rear mold of the fixed die 4 of the second-shot mold, and then the mold is closed to form the second shot. After the second-shot mold is formed, the same operation as above is performed to take out the final molded product.

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

Claims (6)

1. Thick wall lid bijection shaping structure, including installation base (1), its characterized in that: two guide rails (2) are fixedly connected to the front end and the rear end of the upper surface of the installation base (1), a mold injection fixed mold (3) is arranged at one end of the upper surface of the installation base (1), a two-shot mold fixed mold (4) is fixedly connected to the other end of the upper surface of the installation base (1), one side of the two-shot mold fixed mold (3) corresponds to two guide rails (2), a mold movable mold (5) is arranged between the two guide rails, and an automatic demolding device (16) is arranged inside the mold movable mold (5).

2. The thick-walled cover dual shot molding structure of claim 1, wherein: threaded rod slot (7) has been seted up to one side of mould movable mould (5), a plurality of logical grooves that are annular distribution have been seted up to one side of mould movable mould (5), the port department that corresponds a plurality of logical grooves on mould movable mould (5) all fixedly connected with crowded mould ring (6).

3. The thick-wall cover dual injection molding structure according to claim 2, wherein: the movable plug-in type double-shot mold is characterized in that a long threaded rod (10) is movably inserted in the threaded rod slot (7), one end of the long threaded rod (10) is fixedly inserted in one side of the movable mold (5), an inner cavity groove (17) is formed in an inner cavity of the double-shot mold fixed mold (4), and the inner cavity groove (17) is communicated with the threaded rod slot (7) and a through groove in the movable mold (5).

4. A thick-walled cover dual shot molding structure according to claim 3, wherein: the inner cavity groove (17) is formed by connecting a middle annular cavity and a plurality of small annular cavities around the middle annular cavity.

5. The thick-wall lid dual shot molding structure of claim 4, wherein: automatic shedder (16) are including swage pole (8), follower gear (9), screw sleeve (11) and driving gear (12), threaded connection has screw sleeve (11) in correspondence inner chamber groove (17) on long threaded rod (10), the side fixedly connected with driving gear (12) of screw sleeve (11), all movable grafting has swage pole (8) in the logical groove of mould movable mould (5), fixedly connected with follower gear (9) in correspondence inner chamber groove (17) on swage pole (8), follower gear (9) all meshes with driving gear (12), follower gear (9) surface is the tooth of slope form.

6. The thick-wall cover dual injection molding structure according to claim 5, wherein: the novel plastic injection molding machine is characterized in that a motor (13) is arranged in an inner cavity of the movable mold (5), a rotating piece (14) is fixedly connected to a rotating shaft of the motor (13), the rotating piece (14) is connected with a threaded sleeve (11) through a transmission belt, a plurality of cavities (15) are formed in one side, close to the movable mold (5), of the fixed mold (4) of the two-shot mold, and one end of the material pressing rod (8) is movably inserted into the cavities (15).