CN113815197A

CN113815197A - Thread machining die

Info

Publication number: CN113815197A
Application number: CN202110982311.2A
Authority: CN
Inventors: 黄佰胜; 林可贵; 陈玉麟; 余志强
Original assignee: Shenzhen Nanhe Jianyi Mould Co ltd
Current assignee: Shenzhen Nanhe Jianyi Mould Co ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2021-12-21

Abstract

The invention provides a thread machining die which comprises a male die and a female die matched with the male die; a cavity is arranged on the female die; the male die is provided with a demolding assembly and a core matched with the cavity, the tail end of the core is provided with a thread forming section stretching into the cavity and internally tangent to form an internal thread, and the demolding assembly is connected with the core to drive the core to rotationally demold. And cooling and solidifying the formed bottle cap subjected to injection molding, then opening the mold, driving the mold core to rotate by the demolding assembly, pushing the bottle cap to move outwards, demolding the bottle cap, and finally forming the bottle cap. In the mold, the internal thread of the bottle cap is directly formed by the thread forming section, a motor, a transmission device and a thread processing cutter are not needed, the internal damage of the bottle cap is avoided, and the forming quality and the yield of the bottle cap are improved.

Description

Thread machining die

Technical Field

The invention relates to the field of die equipment, in particular to a thread machining die.

Background

At present, thread machining inside a bottle cap is generally carried out by a motor and a thread machining cutter. When the threads in the bottle cap are machined, the motor drives the thread machining cutter to feed along the axial direction of the bottle cap through the transmission device so as to machine the threads. Due to the inertia of the motor and the transmission device, the thread machining tool cannot be stopped suddenly and easily collides with the bottle cap, so that the bottle cap is damaged, and the machining quality is affected.

Disclosure of Invention

In order to overcome the defects of the prior art, one of the objectives of the present invention is to provide a thread processing mold to solve the technical problem of product damage caused by processing threads with a thread processing tool in the prior art.

One of the purposes of the invention is realized by adopting the following technical scheme:

a thread-working die comprising a male die and a female die cooperating with the male die;

a cavity is arranged on the female die;

the male die is provided with a demolding assembly and a core matched with the cavity, the tail end of the core is provided with a thread forming section stretching into the cavity and internally tangent to form an internal thread, and the demolding assembly is connected with the core to drive the core to rotationally demold.

Optionally, the demolding assembly comprises a transmission mechanism and a power member outputting a rotational movement, a part of the transmission mechanism is connected with the power member, and another part of the transmission mechanism is connected with the mold core to transmit the rotational movement to the mold core.

Optionally, the transmission mechanism includes a rotating shaft, a first gear, a second gear, a third gear and a transmission chain, the rotating shaft and the mold core are arranged side by side, the first gear is arranged on the mold core, the second gear is arranged on the rotating shaft, the second gear is engaged with the first gear, the third gear is arranged on the rotating shaft, and the third gear is connected with the power part through the transmission chain in a driving manner.

Optionally, the power member is an electric motor or a pneumatic motor.

Optionally, the male die is further provided with a plurality of bearings, two of the bearings are arranged on the core and located on two sides of the first gear, and the other two bearings are arranged on the rotating shaft and located on two sides of the second gear.

Optionally, the core is shaped like a shaft, a first end of the core is provided with the thread forming section, and a second end of the core is connected with the corresponding bearing.

Optionally, still be equipped with the mounting bracket on the public mould, the mounting bracket includes fixed plate and mounting panel, the fixed plate is fixed in on the lateral wall of public mould, the mounting panel is fixed in on the fixed plate, the power spare is fixed in on the affiliated province's mounting panel.

Optionally, a positioning protrusion is arranged on a side wall of the fixing plate facing the male die;

and the side wall of the male die facing the fixed plate is provided with a positioning groove corresponding to the positioning bulge.

Optionally, a thread forming groove matched with the internal thread is formed in the forming section.

Optionally, the core is in a hollow tubular shape, and a shaft sleeve is arranged in the core;

the male die is further provided with an injection molding pipe, the injection molding pipe penetrates through the mold core, and the injection molding pipe is in rotating fit with the mold core through the shaft sleeve.

Compared with the prior art, the invention has the beneficial effects that:

in the thread processing mold, when the bottle cap is formed, the cavity on the female mold and the core on the male mold are matched to form the integral structure of the bottle cap, and meanwhile, the thread forming section on the core extends into the cavity to form the internal thread of the bottle cap inside the bottle cap. And after the bottle cap is cooled and solidified, opening the mold, driving the mold core to rotate by the demolding assembly, pushing the bottle cap to move outwards, demolding the bottle cap, and finally forming the bottle cap. In the mold, the internal thread of the bottle cap is directly formed by the thread forming section, a motor, a transmission device and a thread processing cutter are not needed, the internal damage of the bottle cap is avoided, and the forming quality and the yield of the bottle cap are improved.

Drawings

FIG. 1 is a schematic block diagram of a thread forming die of the present invention;

FIG. 2 is a schematic view of the working principle of the thread forming die of the present invention;

fig. 3 is a circuit diagram of an angle digitizer in the thread processing mold according to the present invention.

In the figure:

1. a female die; 11. a cavity;

2. a male die;

3. a demolding component; 31. a transmission mechanism; 311. a rotating shaft; 312. a first gear; 313. a second gear; 314. a third gear; 315. a drive chain; 32. a power member;

4. a core; 41. a thread forming section; 411. an annular groove; 412. a thread forming groove;

5. a bearing;

6. a mounting frame; 61. a fixing plate; 611. positioning the projection; 62. mounting a plate;

7. and a shaft sleeve.

Detailed Description

The present invention is further described with reference to fig. 1 to 3 and the detailed description thereof, and it should be noted that, in the case of no conflict, any combination between the embodiments or technical features described below may form a new embodiment.

As shown in fig. 1 to 3, the present invention provides a thread processing mold, which can be used for molding an injection molded part and forming an internal thread, wherein the injection molded part is an injection molded product with an internal thread hole, specifically includes a bottle cap and a plastic nut, and can also be used for molding some special-shaped structures, such as a plastic connecting rod with an internal thread, a plastic shell with an internal thread, and the like. Hereinafter, the bottle cap is exemplified.

Specifically, the thread forming die includes a male die 2 and a female die 1 which is fitted to the male die 2. The female die 1 is provided with a cavity 11 for forming a bottle cap, and the cavity 11 is used for forming the external shape of the bottle cap. The male die 2 is provided with a demoulding component 3 and a core 4. The core 4 is matched with the cavity 11 to form the inner shape of the bottle cap by the core 4. More specifically, the core 4 is provided at its distal end with a thread forming section 41 for forming an internal thread of the bottle cap. Stripper assembly 3 is coupled to core 4 to drive core 4 to rotationally strip. When the bottle cap is formed, the cavity 11 on the female die 1 and the core 4 on the male die 2 are matched to form the integral structure of the bottle cap, and meanwhile, the thread forming section 41 on the core 4 extends into the cavity to form the internal thread of the bottle cap in the bottle cap. After the bottle cap is cooled and solidified, the mold is opened, the demolding assembly 3 drives the mold core 4 to rotate, the bottle cap is pushed to move outwards, and therefore the bottle cap is demolded, and finally the bottle cap is formed. In this embodiment, the internal thread of the bottle cap is directly formed by the thread forming section 41 without using a motor, a transmission device and a thread machining tool, so that the internal damage of the bottle cap is avoided, and the forming quality and the yield of the bottle cap are improved.

In some embodiments, as shown in fig. 2, the stripping assembly 3 comprises a transmission 31 and a power member 32 outputting a rotary motion, a part of the transmission 31 being connected to the power member 32, another part of the transmission 31 being connected to the core 4 to transmit the rotary motion to the core 4. The transmission 31 transmits a rotational movement to the core 4, which rotational movement of the core 4 causes the cap to be unscrewed from the core 4, so that the cap is demoulded.

Specifically, the transmission mechanism 31 includes a rotating shaft 311, a first gear 312, a second gear 313, a third gear 314, and a transmission chain 315, wherein the rotating shaft 311 is disposed alongside the core 4, the first gear 312 is disposed on the core 4, the second gear 313 is disposed on the rotating shaft 311, the second gear 313 is engaged with the first gear 312, the third gear 314 is disposed on the rotating shaft 311, and the third gear 314 is drivingly connected to the power member 32 through the transmission chain 315. The power component 32 drives the third gear 314 to rotate through the transmission chain 315, the third gear 314 drives the rotating shaft 311 to rotate, the rotating shaft 311 drives the second gear 313 to rotate, the second gear 313 drives the first gear 312 to rotate, and finally the first gear 312 drives the mold core 4 to rotate.

The power member 32 may be specifically an electric motor or a pneumatic motor.

In some embodiments, as shown in fig. 2, the male mold 2 is further provided with a plurality of bearings 5, wherein two bearings 5 are disposed on the core 4 and located at two sides of the first gear 312, and the other two bearings 5 are disposed on the rotating shaft 311 and located at two sides of the second gear 313. In this embodiment, reduce the friction pack manager of core 4 through setting up bearing 5, improve the rotational stability of core 4, avoid core 4 to cause the damage to the bottle lid when rotatory.

For the core 4, the specific shape is a shaft, a first end of the core 4 is provided with a thread forming section 41, and a second end of the core 4 is connected with the two corresponding bearings 5. The core 4 of axle column structure has higher axiality, and the rotation state is more stable, and the security of bottle lid drawing of patterns is high, reduces or avoids the bottle lid damage.

In some embodiments, as shown in fig. 1 and 2, the male mold 2 is further provided with a mounting frame 6, the mounting frame 6 includes a fixing plate 61 and a mounting plate 62, the fixing plate 61 is fixed on a side wall of the male mold 2, the mounting plate 62 is fixed on the fixing plate 61, and the power member 32 is fixed on the mounting plate 62. In this embodiment, the power member 32 is mounted by providing the mounting bracket 6, specifically, the mounting bracket 6 is fixedly connected to the male mold 2 by the fixing plate 61, and the power member 32 is mounted by the mounting plate 62, thereby realizing the fixed mounting of the power member 32.

In some embodiments, as shown in fig. 2, a positioning protrusion 611 is disposed on a side wall of the fixing plate 61 facing the male mold 2, and a positioning groove corresponding to the positioning protrusion 611 is disposed on a side wall of the male mold 2 facing the fixing plate 61. Before fixed plate 61 and public mould 2 fixed connection, with the constant head tank on the protruding 611 embedding public mould 2 of location to fix a position fixed plate 61 and public mould 2, be convenient for subsequent fixed plate 61 and the fixed connection of public mould 2. For example, after the positioning protrusion 611 is embedded in the positioning groove of the male mold 2, the fixing plate 61 is only required to be slightly pushed against, so that the fixing plate 61 is prevented from dropping, and the fixing plate 61 is more conveniently locked on the side wall of the male mold 2.

In some embodiments, as shown in fig. 3, the thread forming section 41 has an annular groove 411 adapted to the inner shape of the bottle cap, and a thread forming groove 412 adapted to the inner thread of the bottle cap is provided in the annular groove 411.

In some embodiments, as shown in fig. 3, the core 4 is hollow and tubular, a bushing 7 is provided inside the core 4, and the male mold 2 is further provided with an injection molding pipe, which is inserted into the core 4 and is rotationally fitted with the core 4 through the bushing 7. In the embodiment, the functions of injection molding and demolding are integrated on the core 4, and the functions are integrated; realize inboard moulding plastics, the mouth of a river is hidden, improves the appearance quality of moulding plastics. The shaft sleeve 7 is a self-lubricating annular copper sheet, in particular to gorgeous brass.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. A thread forming die, characterized in that the thread forming die comprises a male die and a female die matched with the male die;

a cavity is arranged on the female die;

2. The thread forming die of claim 1, wherein: the demolding assembly comprises a transmission mechanism and a power piece for outputting rotary motion, one part of the transmission mechanism is connected with the power piece, and the other part of the transmission mechanism is connected with the mold core to transmit the rotary motion to the mold core.

3. The thread forming die of claim 2, wherein: the transmission mechanism comprises a rotating shaft, a first gear, a second gear, a third gear and a transmission chain, the rotating shaft is arranged side by side with the mold core, the first gear is arranged on the mold core, the second gear is arranged on the rotating shaft, the second gear is meshed with the first gear, the third gear is arranged on the rotating shaft, and the third gear passes through the transmission chain and is connected with the power part in a driving mode.

4. The thread forming die of claim 3 wherein said power element is an electric motor or a pneumatic motor.

5. The thread forming die of claim 3, wherein: the male die is further provided with a plurality of bearings, two of the bearings are arranged on the core and located on two sides of the first gear, and the other two bearings are arranged on the rotating shaft and located on two sides of the second gear.

6. The thread forming die of claim 5, wherein: the mold core is in a shaft shape, the thread forming section is arranged at the first end of the mold core, and the second end of the mold core is connected with the corresponding bearing.

7. The thread forming die of claim 2, wherein: still be equipped with the mounting bracket on the public mould, the mounting bracket includes fixed plate and mounting panel, the fixed plate is fixed in on the lateral wall of public mould, the mounting panel is fixed in on the fixed plate, the power spare is fixed in on the affiliated province's mounting panel.

8. The thread forming die of claim 7, wherein: a positioning bulge is arranged on the side wall of the fixing plate facing the male die;

9. The thread forming die of claim 1, wherein: and the forming section is provided with a thread forming groove matched with the internal thread.

10. The thread forming die of claim 1, wherein: the mold core is in a hollow tubular shape, and a shaft sleeve is arranged in the mold core;