CN212860281U

CN212860281U - Internal thread demoulding mechanism of injection mould

Info

Publication number: CN212860281U
Application number: CN202021205173.4U
Authority: CN
Inventors: 叶未荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-04-02
Anticipated expiration: 2030-06-24

Abstract

The utility model provides an internal thread demoulding mechanism of injection mould, internal thread demoulding mechanism sets up in the cover half, internal thread demoulding mechanism includes core subassembly and gear, the core subassembly includes the core, the lower extreme of core be equipped with injection molding complex external screw thread structure, the cover is equipped with on the core gear and bearing, the core with the gear be connected with the key round pin between the bearing, the gear is through the pivot of first gear chain connection motor, the motor is installed on the lateral wall of cover half upper end. The utility model discloses the internal thread demoulding mechanism structural design of injection mould is novel, convenient to use is swift, can effectively reduce the processing cost, improve machining efficiency, reduction in production cycle.

Description

Internal thread demoulding mechanism of injection mould

Technical Field

The utility model relates to an injection mould, in particular to internal thread demoulding mechanism of injection mould.

Background

When the transparent plastic part is injected, an internal thread demoulding mechanism is required to be introduced due to the structure with the internal thread in the plastic part. The conventional thinking in the current market is as follows: 1) the utility model discloses an increase flow distribution plate heating runner and advance to glue, increase the conduction structure of screw thread drawing of patterns, extend it, keep away from into glue and the shared center of drawing of patterns, the defect of this kind of structure lies in having increaseed the whole size of mould, can double the manufacturing cost who increases the mould, even the last mould steel cost that the cost of a hot runner just can support. 2) Because the product is small-size, the product is difficult to be manufactured and installed in a limited space unfolding structure, the manufacturing difficulty of the die is greatly enhanced, the assembling precision is not guaranteed, the manufacturing quality of the die is influenced, the manufacturing period of the die is prolonged, once the die is enlarged, equipment with larger model is selected for a corresponding production equipment injection molding machine, the injection molding time is prolonged, the production period of the product is prolonged, the prior opportunity of market competition is lost, and meanwhile, the production cost is increased. In summary, the analysis of the mold opening of the product is made, the product is a PS transparent part, and the internal thread falls on the front mold after parting, so that the glue feeding structure needs a three-mold opening scheme, the thread demolding mechanism also needs a three-mold opening scheme, and in order to not increase the manufacturing cost and the hot runner, the two structures of the thread demolding mechanism and the three-mold opening scheme are combined and coordinated for use.

SUMMERY OF THE UTILITY MODEL

【1】 Technical problem to be solved

The to-be-solved technical problem of the utility model is to provide an internal thread demoulding mechanism of injection mould that structural design is novel, convenient to use is swift can effectively reduce the processing cost, improve machining efficiency, reduction in production cycle.

【2】 Technical scheme for solving problems

The utility model provides an internal thread demoulding mechanism of injection mould, internal thread demoulding mechanism sets up in the cover half, internal thread demoulding mechanism includes core subassembly and gear, the core subassembly includes the core, the lower extreme of core be equipped with injection molding complex external screw thread structure, the cover is equipped with on the core gear and bearing, the core with the gear be connected with the key round pin between the bearing, the gear is through the pivot of first gear chain connection motor, the motor is installed on the lateral wall of cover half upper end.

Furthermore, the core assemblies are divided into two groups, the two groups of core assemblies are respectively connected with a first gear and a second gear, the first gear is connected with the motor through the first gear chain, and a second gear chain is connected between the first gear and the second gear.

Furthermore, each core is provided with two bearings, and the two bearings are respectively arranged on two sides of the gear.

Furthermore, the upper ends of the two cores are provided with check rings.

Furthermore, each mold core is sleeved with a spring, a step is arranged at the upper end of the mold core, and the springs are arranged between the lower end of the step and the bearing on the closer side.

Furthermore, a key pin groove matched with the key pin is formed in the core.

Further, the key pin groove is in clearance fit with the key pin, and the key pin is in clearance fit with the bearing.

【3】 Advantageous effects

The utility model discloses the internal thread demoulding mechanism structural design of injection mould is novel, convenient to use is swift, can effectively reduce the processing cost, improve machining efficiency, reduction in production cycle.

Drawings

Fig. 1 is a schematic structural view of an internal thread demoulding mechanism of an injection mould of the utility model;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a perspective view of a core in an internal thread demolding mechanism of the injection mold of the present invention;

fig. 4 is a schematic structural view of the injection mold of the present invention.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 4, the present invention provides an internal thread demoulding mechanism of an injection mould, the internal thread demoulding mechanism is arranged in a fixed mould, the internal thread demoulding mechanism comprises a core assembly and a gear, the core assembly can be one group or two or more groups, and each group of core assembly is respectively matched with a gear; the core assembly comprises a core 2, an external thread structure 21 matched with an injection molding piece is arranged at the lower end of the core 2, the core 2 is sleeved with the gear and the bearing 4, a key pin is connected between the core 2 and the gear and between the core 2 and the bearing 4, the gear is connected with a rotating shaft 71 of a motor 7 through a first gear chain 6, the motor 7 is installed on the side wall of the upper end of the fixed die (the upper end of the fixed die refers to the upper end of an installation die in fig. 4), and the motor 7 is installed at the upper end of the fixed die, so that the installation space in the injection molding machine can be saved and the installation of the die is facilitated, and if the motor 7 is installed at the lower end of the fixed die, the motor may interfere with;

in order to facilitate the demolding of the core 2, in the embodiment, the core 2 is provided with a key pin groove 22 matched with the key pin 10, and the key pin groove 22 is an open groove; the key pin groove 22 is in clearance fit with the key pin 10, the key pin 10 is in clearance fit with the bearing 4 and the gear, and the core 2 is in clearance fit with the bearing 4; the advantage of this arrangement is that the key 10 is mounted in the key slot 22, and the two ends of the key slot 22 can block the key 10, and the key 10 can move linearly with the core 2 when the bearing 4 rotates.

With reference to fig. 1 to 4, a preferred embodiment of the present invention will be described below, in this embodiment, in order to improve the production efficiency, there are two sets of core assemblies, two sets of core assemblies respectively correspond to two sets of injection molding parts, and a first gear 5 and a second gear 9 are respectively connected to the two sets of core assemblies, wherein the first gear 5 is used as a driving gear and is connected to a rotating shaft 71 of the motor 7 through the first gear chain 6, the motor 7 is preferably a servo motor, which can effectively reduce the noise during production and the stability during operation, and a second gear chain 8 is connected between the first gear 5 and the second gear 9; when the device works, the motor 7 drives the first gear 5 to rotate, and then the first gear 5 drives the second gear 9 to rotate; the upper ends of the two cores 2 are provided with check rings 1, and the check rings 1 play a role in limiting the two cores 2; in the embodiment, two bearings 4 are respectively arranged on each core 2, and the two bearings are respectively arranged at two sides of the first gear 5 and the second gear 9; in order to achieve better resetting in the embodiment, each core 2 is sleeved with a spring 3, the upper end of each core 2 is provided with a step 23, and the spring 3 is arranged between the lower end of the step 23 and the bearing 4 on the closer side.

Referring to fig. 1 to 4, the using mode of the internal thread demoulding mechanism of the injection mould of the present invention is explained in detail, firstly, the retainer ring 1 is installed between the fixed mould base plate 11 and the fixed plate 12, the internal thread demoulding mechanism of the injection mould of the present invention is arranged on the fixed plate 12, the lower end of the fixed plate 12 is the stripper plate 13, the lower end of the stripper plate 13 is the fixed mould cavity fixed plate 14, the two cores 2 respectively extend downwards into two cavities of the fixed mould cavity fixed plate 14, the bearing 4 at the upper end of each core 2 is installed on the fixed plate 12, the bearing 4 at the lower end of each core 2 is installed on the stripper plate 13, and the retainer ring 1 is installed on the fixed; the mold opening method comprises the following steps that after injection molding is finished and mold opening is carried out, the stripper plate 13 is separated from the fixed plate 12 by a certain distance which can be set on an injection molding machine, the distance between the stripper plate 13 and the fixed plate 12 is certainly larger than the length of the external thread structure 21, in the implementation, the distance between the stripper plate 13 and the fixed plate 12 is 10mm, the length of the external thread structure 21 is 8mm, mold opening is suspended after the stripper plate 13 is separated from the fixed plate 12 by the set distance, and the mold core 2 moves towards the direction that the stripper plate 13 is separated from the fixed plate 12 under the action force that the stripper plate 13 is separated from the fixed plate 12 due to matching with an injection molding part and is compressed by the spring 3; then a control unit triggers a motor 7 to start a switch to drive an internal thread demoulding mechanism to operate, the motor 7 drives a first gear 5 to rotate through a first gear chain 6, simultaneously the first gear 5 drives a second gear 9 to rotate through a second gear chain 8, at the moment, an external thread structure 21 on a core 2 in two core assemblies is separated from an injection molding piece in a cavity, the separation principle is that the core 2 rotates, the injection molding piece in the cavity is fixed according to the extension of the principle of the nut-screw motion relation, the core 2 rotates and simultaneously generates linear movement (moves in the rotating direction of the core 2), as a spring 3 is pressed in earlier stage, the moving force of the core 2 and a key pin 10 in a bearing 4 is increased, the friction force generated by driving the key pin 10 when the bearing 4 rotates is overcome, and the core 2 can instantly keep away from a dispensing position under the action of the spring 3 after being completely separated from the injection molding piece, ensuring that the mold core 2 is fully separated; the two cores 2 are respectively driven to move in the opposite directions of the separation directions of the stripper plate 13 and the fixed plate 12 by rotating the first gear 5 and the second gear 9, after an external thread structure 21 on the core 2 is separated from an injection molding piece in a cavity, the fixed die cavity fixed plate 14 is separated from the stripper plate 13 under the action of a rubber plug, when the fixed die cavity fixed plate 14 is separated to a certain position (the length of the position is larger than the length of the solidified material of the injection molding piece, in order to ensure that the solidified material is separated from the stripper plate 13 and the fixed plate 12), the fixed die cavity fixed plate 14 stops moving under the action of a stop lever, then the movable die and the fixed die are separated, the whole die opening action is completed after the movable die and the fixed die are separated, after the die opening is completed, the injection molding machine enables the push-out mechanism to work, the injection molding piece is separated from the movable die by the push-out mechanism, then the stub bar of, the external wiring is changed through the core pulling function group on the injection molding machine, the mold closing action is not delayed, and the next injection molding is carried out after the mold closing is finished.

The utility model discloses the internal thread demoulding mechanism structural design of injection mould is novel, convenient to use is swift, can effectively reduce the processing cost, improve machining efficiency, reduced production cycle.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an internal thread demoulding mechanism of injection mould, internal thread demoulding mechanism sets up in the cover half, its characterized in that: the internal thread demoulding mechanism comprises a core component and a gear, the core component comprises a core, the lower end of the core is provided with an external thread structure matched with an injection molding piece, the core is sleeved with the gear and a bearing, the core is connected with a key pin between the gear and the bearing, the gear is connected with a rotating shaft of a motor through a first gear chain, and the motor is installed on the side wall of the upper end of the fixed die.

2. The internal thread demolding mechanism for an injection mold according to claim 1, wherein: the core assembly is divided into two groups, a first gear and a second gear are connected to the two groups of core assemblies respectively, the first gear is connected with the motor through the first gear chain, and a second gear chain is connected between the first gear and the second gear.

3. The internal thread demolding mechanism for an injection mold according to claim 2, characterized in that: and two bearings are respectively arranged on each core and are respectively arranged on two sides of the gear.

4. The internal thread demolding mechanism for an injection mold according to claim 2, characterized in that: the upper ends of the two cores are provided with check rings.

5. An internally threaded ejection mechanism for an injection mold according to claim 3, wherein: each core is sleeved with a spring, a step is arranged at the upper end of each core, and the springs are arranged between the lower ends of the steps and the bearings on the near side.

6. The internal thread demolding mechanism for an injection mold according to claim 1, wherein: and the core is provided with a key pin groove matched with the key pin.

7. The internal thread demolding mechanism for an injection mold according to claim 6, wherein: the key pin groove is in clearance fit with the key pin, and the key pin is in clearance fit with the bearing.