TWI382897B - Thread die - Google Patents

Description

Thread mold

The present invention relates to a threaded mold, and more particularly to a threaded mold.

When the optical lens module is developed or mass-produced, the torque value of the cooperation between the lens holder and the lens barrel needs to reach the design value to facilitate the adjustment of the focal length.

The method of adjusting the torque usually has the following three directions: 1. Adjusting the molding parameters such as the temperature during molding or cooling. When the mass production value is different due to the change of the temperature and humidity of the workshop during mass production, this method is usually used to adjust; 2. Adjust the surface properties of the screw base of the mirror base or the surface roughness of the screw. During the development stage of the product, the thread size of the mirror base is used to adjust the torque. It is said that the same lens barrel is used. It is necessary to design mirror holders with different screw sizes or surface properties according to different torque requirements; 3. In the lens barrel mold, adjust the size of the thread of the lens barrel mold to adjust the torque, that is, for the same The lens holder needs to design a lens barrel mold with different screw size or surface properties according to different torque requirements.

Among the above three methods, the influence of adjusting the forming parameters on the torque value is very limited. To adjust the thread size or surface properties of the lens holder or the lens barrel mold, it is necessary to design a plurality of mirror molds or lens barrel molds according to the needs, and the conventional In the mirror mold or the lens barrel mold, in order to process the mirror base or the lens barrel with different screw teeth, the thread molds with different thread teeth are processed, and then according to the products to be processed, during the processing The thread mold is replaced to produce a product that meets the requirements, thus increasing the cost of mold processing. The processing cost of the lens holder and the lens barrel is further improved.

In view of this, it is necessary to provide a threaded mold having a lower cost for processing a plurality of threads.

A thread mold includes a main body portion and a threaded portion attached to the main body portion, wherein at least one sliding groove is disposed on one of the main body portion and the threaded portion, and the sliding groove has a first abutting The front body portion and the screw portion are provided with at least one rib on the other side, and the rib has a second abutting surface corresponding to the first abutting surface of the sliding groove, the convex portion The strip is received into the sliding slot, and the first abutting surface abuts against the second abutting surface.

In the above thread mold, since the sleeve has a detachable screw portion, the screw portion of the sleeve can be replaced with a thread portion having a different thread when the mold is opened, so that a plurality of different portions can be processed. The threaded lens barrel can meet the different torque value requirements between the lens holder and the lens barrel without replacing the main body of the sleeve, which reduces the processing cost of the lens barrel.

Hereinafter, the present invention will be further described by taking a thread mold of a processing barrel as an example with reference to the accompanying drawings.

As shown in FIG. 1, the lens barrel 10 has a cylindrical shape, and its outer surface is provided with a thread so that the lens barrel 10 can be screwed into a corresponding lens holder (not shown).

The thread die is used in combination with a male die 30, a female die 40 and an insert 50 for processing the lens barrel 10. In this embodiment, the thread mold is a sleeve 20 having an internal thread.

The sleeve 20 is disposed in the male mold 30, and the inlet 50 is disposed in The sleeve 20 is slidable relative to the sleeve 20. A first cavity 43 is defined in the female mold 40.

The sleeve 20 includes a main body portion 21 and a threaded portion 23 detachably mounted to the top end of the main body portion 21.

The main body portion 21 and the threaded portion 23 are both cylindrical, and each has a first through hole 211 and a second through hole 231. The first through hole 211 is in communication with the second through hole 231. The diameter of the first through hole 211 is smaller than the diameter of the second through hole 231. The wall portion of the first through hole 211 is a smooth surface, and the wall portion of the second through hole 231 is provided with an internal thread for forming a thread on the outer surface of the lens barrel 10.

The insert 50 has a solid cylindrical shape and slides in the sleeve 20 along the wall portion of the first through hole 211. The top of the inlet 50 is located in the second through hole 231, and the outer surface thereof is spaced apart from the wall of the second through hole 231 by a distance between the inlet 50 and the threaded portion 23 of the sleeve 20. Two cavities 53.

When the mold is closed, the first cavity 43 and the second cavity 53 together form a molding cavity 13, and the molten plastic can be injected into the molding cavity 13 via a runner (not shown). The lens barrel 10. Then, the mold opening operation is performed, and the driving sleeve 20 is rotated by a driving device (not shown) to gradually screw the thread of the sleeve 20 out of the thread of the lens barrel 10, thereby separating the sleeve 20 from the lens barrel 10. Then, the lens barrel 10 is ejected from the molding cavity 13 by the ejector mechanism provided on the male mold 30 or directly by the inlet 50, thereby achieving separation of the lens barrel 10 from the mold.

As shown in FIG. 2 and FIG. 3, the bottom surface of the screw portion 23 of the sleeve 20 The two sliding slots 233 are respectively disposed on the left and right sides of the second through hole 231. The sliding groove 233 has a first groove 233a having a larger width and a second groove 233b having a smaller width. The first groove 233a and the second groove 233b are formed with two first holes. Face 233c. The top surface of the main body portion 21 is provided with two ribs 213 corresponding to the sliding groove 233 of the screw portion 23, and the two ribs 213 are respectively disposed on the left and right sides of the first through hole 211, and the rib 213 has The first protrusion 213a, the second protrusion 213b and the second abutting surface 213c corresponding to the first groove 233a, the second groove 233b and the first abutting surface 233c of the sliding groove 233, the sliding groove 233 and the rib 213 are matched by a tight fit.

When the sleeve 20 is assembled, the threaded portion 23 is first placed on the main body portion 21 such that the second projection 213b of the main body portion 21 is located in the first recess 233a of the threaded portion 23, and the main body portion 21 is The second protrusion 213b is aligned with the second groove 233b of the screw portion 23, and then the screw portion 23 is pushed to slide the second protrusion 213b of the main body portion 21 toward the second groove 233b of the screw portion 23 until the main body The second protrusion 213b of the portion 21 is completely received into the second recess 233b of the threaded portion 23, and the second abutting surface 213c of the protruding strip 213 abuts against the first abutting surface 233c of the sliding groove 233.

When the sleeve 20 is detached, the thread portion 23 can be detached from the main body portion 21 by simply pushing the screw portion 23 to slide in the opposite direction.

In the thread mold of the embodiment, since the sleeve 20 has the detachable thread portion 23, the thread portion 23 of the sleeve 20 can be replaced with a thread portion having a different thread when the mold is opened. 23, thereby processing a plurality of lens barrels 10 having different threads, which can satisfy the difference between the lens holder and the lens barrel 10 Torque value requirements without the need to replace the body portion 21 of the sleeve 20 reduce the processing cost of the lens barrel 10.

In this embodiment, the rib 213 is disposed on the main body portion 21, and the sliding groove 233 is disposed on the thread portion 23. It can be understood that the rib 213 can also be disposed on the threaded portion 23, and the sliding groove 233 is correspondingly disposed on the main body portion 21.

In this embodiment, the ribs 213 and the sliding grooves 233 are respectively provided with two abutting surfaces 213c and 233c. It can be understood that the ribs 213 and the sliding grooves 233 may have only one abutting surface 213c, 233c.

In this embodiment, the difference between the first groove 233a and the second groove 233b of the sliding groove 233 and the width difference between the first protrusion 213a and the second protrusion 213b of the rib 213 are utilized in the sliding groove 233 and The first and second abutting surfaces 213c and 233c are formed on the ribs 213, so that the mutual splicing of the ribs 213 and the sliding grooves 233 is realized, and the detachable mounting between the ribs 213 and the sliding grooves 233 is further realized. It can be understood that the abutment surface can be formed on the ridge and the sliding groove by using the height difference, that is, the rib includes a first bump having a larger height and a second bump having a smaller height, the sliding The groove includes a first groove having a larger depth and a second groove having a smaller depth, thereby between the first protrusion and the second protrusion, and the first groove and the second groove The abutment faces are formed between the grooves.

The above embodiment describes the threaded mold by processing the lens barrel 10 having an external thread. It can be understood that the thread mold can also be used for processing components such as a mirror base having an internal thread, and the internal thread is processed by using the thread mold. In the case of the component, the external thread is provided on the insert 50, and the inner surface of the sleeve 20 is set as a smooth surface, and the introduction described in this embodiment is required. The sub-section 50 is split into a main body portion and a screw portion detachably attached to the top end of the main body portion, and a mounting manner between the screw portion and the main body portion of the insert 50 and the screw portion of the sleeve 20 described above 23 is installed in the same manner as the main body portion 21, and will not be described herein.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

Mirror ‧‧10

Molding chamber ‧‧13

Sleeve ‧‧20

Main body ‧‧21

First through hole ‧ ‧ 211

Rib ‧‧ 213

First bump ‧‧ 213a

Second bump ‧ ‧ 213b

Second abutment ‧‧‧213c

Screw Department ‧‧23

Second through hole ‧‧231

Chute ‧‧ 233

Groove ‧‧‧233a

Second groove ‧‧‧233b

First abutment ‧‧ ‧c

Public model ‧ ‧ 30

Female model ‧ ‧ 40

First cavity ‧‧43

Entries ‧ ‧ 50

Second cavity ‧‧53

Molding cavity ‧‧‧141

1 is a schematic view of a thread mold in a mold clamping process according to a preferred embodiment of the present invention.

2 is a perspective exploded view of the sleeve of the thread mold of FIG. 1 after being turned 180 degrees.

Figure 3 is a plan view of the threaded portion of the sleeve of Figure 2;

Sleeve ‧‧20

Main body ‧‧21

First through hole ‧ ‧ 211

Rib ‧‧ 213

First bump ‧‧ 213a

Second bump ‧ ‧ 213b

Second abutment ‧‧‧213c

Screw Department ‧‧23

Second through hole ‧‧231

Chute ‧‧ 233

Groove ‧‧‧233a

Second groove ‧‧‧233b

First abutment ‧‧ ‧c

Claims (9)

A thread mold is improved in that the thread mold comprises a main body portion and a screw portion mounted on the main body portion, and at least one sliding groove is disposed on one of the main body portion and the screw portion. The sliding groove has a first abutting surface, and the main body portion and the screw portion are provided with at least one rib on the other one, and the rib has a first abutting surface corresponding to the sliding groove. The abutting surface is received in the sliding slot, and the first abutting surface abuts against the second abutting surface. The thread mold according to claim 1, wherein the rib and the sliding groove are matched by a tight fit. The thread mold according to claim 1, wherein the sliding groove has a first groove and a second groove connected to the first groove, wherein the width of the first groove is greater than a width of the second groove, the first abutting surface is formed between the first groove and the second groove, the ridge has a first protrusion and is connected to the first protrusion a second bump, a width of the first bump is greater than a width of the second bump, and the second abutting surface is formed between the first bump and the second bump. The thread mold of claim 1, wherein the chute has a first groove and a second groove connected to the first groove, the first groove having a depth greater than a width of the second groove, the first abutting surface is formed between the first groove and the second groove, the ridge has a first protrusion and is connected to the first protrusion a second bump, the height of the first bump is greater than a width of the second bump, and the second abutting surface is formed between the first bump and the second bump. The thread mold of claim 1, wherein the thread mold is an externally threaded insert. The thread mold of claim 1, wherein the thread mold is a sleeve having an internal thread. The thread mold according to claim 6, wherein the sleeve is used in combination with a male mold, a female mold and an insert, and the sleeve is disposed in the male mold, and the insert is Slidably disposed in the sleeve, a molding cavity is formed between the sleeve, the inlet and the master. The threading die of claim 7, wherein the main body of the sleeve is provided with a first through hole, and the threaded portion of the sleeve is provided with a second communicating with the first through hole. a through hole having a diameter smaller than a diameter of the second through hole. The thread mold according to claim 8, wherein the at least one rib comprises two ribs disposed on two sides of the first through hole of the main body portion, and the at least one chute comprises a screw portion. Two chutes on both sides of the second through hole.