CN101333065A - Mold core manufacturing method, mold core and mold using same - Google Patents

Abstract

The invention provides a die-core manufacturing method, which comprises the following steps: providing an eccentric die core and testing the deviation of the eccentric die core; providing a first blank and forming a first molding surface on one surface of the first blank so as to form a first template, while a deviation consistent with the deviation of the eccentric die core is arranged between the geometric centerline of the first template and the centerline of the first molding surface; providing a second blank and processing a second molding surface on one surface of the second blank so as to form a second template; the first template and the second template are oppositely arranged based on the location of the eccentric die core, so that the centerline of the first molding surface and the centerline of the second molding surface can be superposed to form a die core. In addition, the invention also relates to a die core which is made based on the die-core manufacturing method, and a die which adopts the die core. The die-core manufacturing method, the die core and the die using the die core can eliminate the eccentric phenomena existing in the optical lens molding process and improve the manufacturing quality of optical lenses.

Description

Mold core manufacturing method, mold core and mold using same

technical field

The invention relates to a manufacturing method of a mold core, a mold core and a mold using the mold core, in particular to a mold core manufacturing method capable of eliminating the eccentric phenomenon existing in the forming process of optical lenses, a mold core and a mold using the mold core .

Background technique

Injection molding is to process the shape and structure of the mold core blank to make the mold core, and then assemble the mold core and the mold base into a complete set of injection mold, and install the injection mold on the molding machine, at the same time Control the pressure and temperature in the injection mold, inject the molten plastic into the injection mold, and finally form the plastic product through cooling and solidification. Injection molding technology has the characteristics of fast molding speed, one-time molding, and long service life of the mold. For the manufacturing method of the mold core, please refer to the paper Knowledge-based mold design for injectionmolding processing published by Tseng et al. at the 1990 IEEE International Symposium on Intelligent Control (1990 IEEE International Symposium on Intelligent Control).

However, when the above-mentioned injection mold is used to manufacture optical lenses, the optical lenses often have misalignment between the optical axis of the formed optical lens and its geometric centerline due to the amount of deviation between the dies included in the mold core, that is, the The phenomenon of eccentricity exists in the molding process of the above-mentioned optical lens. A kind of existing injection mold 10 as shown in Figure 1, it comprises a first mold base 111, a second mold base 112 and a plurality of mold cores, such as mold core 12, mold core 13 and mold core 14 to once Form multiple optical lenses. The mold core 12 is an eccentric mold core, which includes a first mold piece 100 mounted on the first mold base 111 and a second mold piece mounted on the second mold base 112 122. The first mold piece 100 includes a first molding surface 100a, and the second mold piece 122 includes a second molding surface 122a. The first molding surface 100a and the second molding surface 122a are respectively used to mold the first curved surface 100a and the second curved surface 100b of the optical lens 100 during the injection molding process, as shown in FIG. 2 . Since the first mold piece 100 produces a deviation φ relative to the second mold piece 122, a deviation φ also occurs between the first molding surface 100a and the second molding surface 122a, so After the optical lens 100 is injection molded, there is a corresponding deviation φ between the centerline m of the first curved surface 100a and the centerline n of the second curved surface 100b, that is, the optical axis s of the optical lens 100 and the centerline n of the second curved surface 100b. Geometric center lines t do not coincide, and there is eccentricity in the molding process of the optical lens 100, but there is no deviation in the mold cores 13 and 14, so the lenses produced by the mold core 12 are unqualified lenses, and the mold core 12 Needs to be replaced.

Contents of the invention

In view of this, it is necessary to provide a mold core manufacturing method, a mold core and a mold using the mold core which can eliminate the eccentric phenomenon existing in the molding process of optical lenses.

A method for manufacturing mold cores, mold cores and molds using the mold cores that can eliminate the eccentric phenomenon in the molding process of optical lenses will be described below with examples.

A mold core manufacturing method, which includes: providing an eccentric mold core and testing the deviation of the eccentric mold core, the eccentric mold core is used for forming an optical lens with two opposite first curved surfaces and second curved surfaces; providing a A first blank, forming a first molding surface consistent with the first curved surface of the optical lens on a surface of the first blank to form a first mold, and the geometric centerline of the first mold There is a deviation from the center line of the first molding surface, and the deviation is equal to the deviation of the eccentric mold core; a second blank is provided, and a surface corresponding to the second blank is formed on a surface of the second blank. A second molding surface consistent with the second curved surface of the optical lens to form a second mold, and the geometric centerline of the second mold coincides with the centerline of the second molding surface; the first The mold piece and the second mold piece are arranged oppositely according to the position of the eccentric mold core so that the first molding surface is opposite to the second molding surface, and the center line of the first molding surface is in line with the second molding surface. The centerlines of the forming faces coincide to form a mold kernel.

A mold core is used to form an optical lens having two opposite first curved surfaces and a second curved surface, the mold core includes a first mold piece and a second mold piece opposite to the first mold piece, the The first mold sheet has a first molding surface for molding the first curved surface of the optical lens, and the second mold sheet has a second molding surface for molding the second curved surface of the optical lens, so The first molding surface is opposite to the second molding surface, the centerline of the first molding surface coincides with the centerline of the second molding surface, and the geometric centerline of the first mold piece is aligned with the second molding surface. There is a predetermined deviation between the geometric centerlines of the dies.

A mold adopting the above-mentioned mold core is used to form an optical lens having two opposite first curved surfaces and a second curved surface, the mold includes: a first mold base, a second mold base and a mold core; the The mold core includes a first mold piece and a second mold piece opposite to the first mold piece, the first mold piece is installed on the first mold base, and the second mold piece is installed on the On the second mold base; the first mold sheet has a first molding surface for molding the first curved surface of the optical lens, and the second mold sheet has a first molding surface for molding the optical lens The second molding surface of the two curved surfaces, the first molding surface is opposite to the second molding surface, the centerline of the first molding surface coincides with the centerline of the second molding surface, and the first mold piece There is a predetermined amount of deviation between the geometric centerline of and the geometric centerline of the second die.

Compared with the prior art, the mold core manufacturing method, the mold core and the mold using the mold core are provided by setting a mold core with a first mold piece and a second mold piece, and by placing the first mold piece The center line of the first molding surface of the mold is set to coincide with the center line of the second molding surface of the second mold, which can correct the deviation caused by the deviation between the first mold and the second mold. The resulting eccentric phenomenon in the forming process of the optical lens makes the optical axis of the formed optical lens coincide with its geometric centerline, thereby improving the manufacturing quality of the optical lens.

Description of drawings

Fig. 1 is a schematic structural view of an existing injection mold with an eccentric mold core.

Fig. 2 is a schematic diagram of the optical lens formed by the injection mold with an eccentric mold core in Fig. 1 .

FIG. 3 is a schematic structural view of a mold core installed in a mold base and forming an optical lens according to the first embodiment of the present invention.

Fig. 4(a) is a schematic cross-sectional view of adjusting the relative position of the first blank and the tool in the mold core manufacturing method provided by the first embodiment of the present invention.

Fig. 4(b) is a schematic top view of adjusting the relative positions of the first blank and the tool in the mold core manufacturing method provided by the first embodiment of the present invention.

FIG. 5( a ) is a schematic cross-sectional view of the first die produced by the die core manufacturing method provided by the first embodiment of the present invention.

FIG. 5( b ) is a schematic top view of the first die manufactured by the die core manufacturing method provided in the first embodiment of the present invention.

Fig. 6(a) is a schematic cross-sectional view of adjusting the relative position of the second blank and the cutter in the mold core manufacturing method provided by the first embodiment of the present invention.

Fig. 6(b) is a schematic cross-sectional view of adjusting the relative position of the second blank and the tool in the mold core manufacturing method provided by the first embodiment of the present invention.

FIG. 7( a ) is a schematic cross-sectional view of a second die manufactured by the die core manufacturing method provided in the first embodiment of the present invention.

FIG. 7( b ) is a schematic top view of the second die produced by the die core manufacturing method provided in the first embodiment of the present invention.

Fig. 8 is a schematic structural view of the mold core provided by the first embodiment of the present invention.

FIG. 9 is a schematic structural view of a mold core for molding an optical lens provided by the second embodiment of the present invention.

FIG. 10 is a schematic structural view of a mold for forming an optical lens provided by the third embodiment of the present invention.

Detailed ways

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

Please refer to Fig. 2 and Fig. 3, the mold core manufacturing method provided by the first embodiment of the present invention includes the following steps:

(1) An eccentric mold core is provided and the deviation of the eccentric mold core is measured. The eccentric mold core is used for molding an optical lens having two opposite first and second curved surfaces.

The eccentric mold core 12 includes a first eccentric mold piece 121 and a second eccentric mold piece 122, the first eccentric mold piece 121 is installed on the first mold base 111, and the second eccentric mold piece 122 is mounted on the second mold base 112 . The second eccentric die 122 is arranged opposite to the first eccentric die 121, the first eccentric die 121 includes a first molding surface 121a for molding the first curved surface 100a of the optical lens 100, the The second eccentric mold piece 122 includes a second molding surface 122a for molding the second curved surface 100b of the optical lens 100, and there is a deviation φ between the first eccentric mold piece 121 and the second eccentric mold piece 122 , the deviation φ between the centerline m of the first molding surface 121a and the centerline n of the second molding surface 122a is equal to the deviation between the first eccentric mold piece 121 and the second eccentric mold piece 122 Measure φ.

(2 provide a first blank, form a first molding surface consistent with the first curved surface of the optical lens on a surface of the first blank, to form the first die, and the geometry of the first die There is a deviation between the center line and the center line of the first molding surface, and the deviation is equal to the deviation of the eccentric core.

4 and 5, the first bad material 20 includes a base 20a and a main body 20b, the main body 20b is arranged on the base 20a, and the base 20a and the main body 20b are both Being a cylindrical structure, the base 20a and the main body 20b have a common geometric centerline g.

Before processing the first bad material 20, a fixed seat 30 and a cutter 40 can be provided, and the base 20a of the first bad material 20 can be fixed on the fixed seat 30, so that the The relative position between the fixing seat 30 and the tool 40 is used to process the surface 20c of the first blank 20 by the tool 40 to obtain the required first forming surface 200a. Specifically, the tool 40 can perform a feed motion in a direction parallel to the geometric centerline g of the first blank 20, and the feed motion direction of the tool 40 is defined as a reference line k to adjust the base 20a Or the relative position of the cutter 40, so that the deviation between the geometric center line g of the first blank 20 and the reference line k is equal to the first eccentric die piece 121 and the second eccentric die die piece 122 The deviation between φ.

After the relative position of the base 20a or the cutter 40 is determined, the cutter 40 can be driven to make a feed motion along the direction of the reference line k, so as to turn the first molding surface 200a on the surface 20c to form The first mold piece 200 , the geometric centerline g of the first mold piece 200 coincides with the geometric centerline g of the first blank 20 .

(3) A second blank is provided, and a second molding surface consistent with the second curved surface of the optical lens is formed on a surface of the second blank to form a second mold sheet, and the second mold The geometric centerline of the sheet coincides with the centerline of the second forming surface.

6 and 7, the second blank 50 includes a base 50a and a main body 50b, the base 50a and the main body 50b are respectively a cylindrical structure, and the main body 50b is arranged on the on the base 50a.

Before processing the second blank 50, the base 50a of the second blank 50 can be fixed to the fixed seat by using the above-mentioned fixed seat 30 and a tool 40 used in making the first blank 20. 30, so that the tool 40 can be driven to make a feed motion along the direction of the geometric centerline r of the second blank 50, so as to turn out the second molding surface 500a on the surface 50c to form the second mold piece 500, The geometric centerline r of the second die sheet 500 and the centerline r of the second molding surface 500a coincide with the geometric centerline r of the second blank 50 respectively.

(4) The first mold piece and the second mold piece are arranged oppositely according to the position of the eccentric mold core so that the first molding surface is opposite to the second molding surface, and the first molding surface The center line of the second molding surface coincides with the center line of the second molding surface to form a mold core.

Please also refer to FIG. 8 , when the first die 200 and the second die 500 are manufactured, the first die 200 and the second die 500 are set opposite to each other so that the The first molding surface 200a is opposite to the second molding surface 500a, and the centerline h of the first molding surface 200a coincides with the centerline r of the second molding surface 500a. At this time, the first mold The deviation φ between the geometric center line g of the sheet 200 and the geometric center line r of the second die 500 is equal to the deviation between the first eccentric die 121 and the second eccentric die 122 Measure φ, thus forming a die of 1000 kernels.

Please refer to FIG. 9 together. The mold core 1000 provided by the second embodiment of the present invention is used for molding an optical lens 800. The molded optical lens 800 has two opposite first curved surfaces 100a and second curved surfaces 100b. The mold core 1000 includes a first die 200 and a second die 500 , and the second die 500 is disposed opposite to the first die 200 . The first mold piece 200 has a first molding surface 200a for molding the first curved surface 800a of the optical lens 800 , and the second mold piece 500 has a second curved surface for molding the optical lens 800 800b of the second molding surface 500a, the first molding surface 200a is opposite to the second molding surface 500a. The centerline h of the first molding surface 200a coincides with the centerline r of the second molding surface 500a, the geometric centerline g of the first mold piece 200 coincides with the geometric centerline r of the second mold piece 500 There is a deviation φ between them.

Referring to FIG. 10 , the mold 90 provided by the third embodiment of the present invention includes a first mold base 911 , a second mold base 912 , and a mold core 1000 . The mold core 1000 includes a first mold piece 200 mounted on the first mold base 911 and a second mold piece 500 mounted on the second mold base 912 .

The first mold piece 200 includes a first molding surface 200a, the second mold piece 500 includes a second molding surface 500a, and the first molding surface 200a and the second molding surface 500a are used for molding respectively during the injection molding process. The first curved surface 900 a and the second curved surface 900 b of the optical lens 900 .

There is a deviation φ between the first die 200 and the second die 500, that is, between the geometric center line g of the first die 200 and the geometric center line r of the second die 500 With deviation φ. The geometric centerline r of the second mold piece 500 coincides with the centerline r of the second molding surface 500a, and the geometric centerline g of the first mold piece 200 coincides with the centerline h of the first molding surface 200a. There is a deviation φ between them.

Due to the deviation φ between the geometric centerline g of the first mold piece 200 and the centerline h of the first molding surface 500a and the distance between the first mold piece 200 and the second mold piece 500 The deviation φ is equal, so when the first mold piece 200 and the second mold piece 500 are installed on the first mold base 911 and the second mold base 912 respectively, and the mold core 1000 is formed, the The deviation φ between the geometric center line g of the first die 200 and the center line h of the first molding surface 500a can correct the deviation between the first die 200 and the second die 500 φ, so that the centerline h of the first molding surface 200a coincides with the geometric centerline r of the second molding surface 500a, so that the optical axis s of the manufactured optical lens 900 coincides with its geometric centerline t, That is, the use of the mold 10 can eliminate the eccentricity that occurs during the molding of the optical lens 100 using the existing injection mold 10 .

The mold core 1000 manufacturing method provided by the embodiment of the present invention, the mold core 1000 and the mold 90 using the mold core 1000 are provided by setting a mold core 1000 with a first mold piece 200 and a second mold piece 500, and by Setting the centerline h of the first molding surface 200a of the first mold piece 200 to coincide with the centerline r of the second molding surface 500a of the second mold piece 500 can eliminate the problem caused by the first mold piece 200 The eccentric phenomenon existing in the molding process of the optical lens 900 caused by the deviation φ between the second mold sheet 500 makes the optical axis s of the optical lens 900 obtained by molding coincide with its geometric centerline t, thereby improving the optical The build quality of the lens 900.

It can be understood that those skilled in the art can make various other corresponding changes and deformations according to the technical concept of the present invention, and all these changes and deformations should belong to the protection scope of the claims of the present invention.

Claims (9)

1. A mold kernel manufacturing method, which comprises: providing an eccentric mold core and testing the deviation of the eccentric mold core, the eccentric mold core is used to form an optical lens having two opposite first curved surfaces and second curved surfaces; A first blank is provided, and a first molding surface consistent with the first curved surface of the optical lens is formed on a surface of the first blank to form a first die, and the geometry of the first die is There is a deviation between the center line and the center line of the first molding surface, and the deviation is equal to the deviation of the eccentric core; A second blank is provided, and a second molding surface consistent with the second curved surface of the optical lens is formed on a surface of the second blank to form a second die, and the geometry of the second die is the centerline coincides with the centerline of the second molding surface; The first mold piece and the second mold piece are arranged oppositely according to the position of the eccentric mold core so that the first molding surface is opposite to the second molding surface, and the center line of the first molding surface coincide with the centerline of the second molding surface to form a mold core. 2. The mold core manufacturing method according to claim 1, wherein the first blank and the second bad material respectively comprise a base and a main body arranged on the base, the first molding surface and The second molding surfaces are respectively formed on one surface of the corresponding main body. 3. The mold core manufacturing method according to claim 2, wherein the base and the main body are respectively a cylindrical structure. 4. The mold core manufacturing method according to claim 2, further comprising the steps of: providing a fixed seat and a cutter, the base of the first blank is fixed on the fixed seat, and the cutter moves in a direction parallel to the center line of the first blank; The relative position between the cutter and the fixed seat is adjusted so that the deviation between the geometric centerline of the first blank and the feed movement direction of the cutter is equal to the deviation of the eccentric core. 5. The mold core manufacturing method according to claim 2, further comprising the steps of: Provide a fixed seat and a tool; Fixing the base of the second blank on the fixed seat, adjusting the relative position between the tool and the fixed seat so that the feed movement direction of the tool is aligned with the geometric centerline of the second blank direction coincides. 6. A mold core for forming an optical lens having two opposite first curved surfaces and a second curved surface, said mold core comprising a first mold piece and a second mold piece opposite to the first mold piece , the first mold sheet has a first molding surface for molding the first curved surface of the optical lens, and the second mold sheet has a second molding surface for molding the second curved surface of the optical lens , characterized in that the first molding surface is opposite to the second molding surface, the centerline of the first molding surface coincides with the centerline of the second molding surface, and the geometric center of the first die There is a predetermined deviation between the line and the geometric centerline of the second die. 7. A mold for molding an optical lens with two opposite first curved surfaces and a second curved surface, said mold comprising: A first mold base, a second mold base and a mold core; The mold core includes a first mold piece and a second mold piece opposite to the first mold piece, the first mold piece is installed on the first mold base, and the second mold piece is installed set on the second mold base; The first mold sheet has a first molding surface for molding the first curved surface of the optical lens, and the second mold sheet has a second molding surface for molding the second curved surface of the optical lens; The first molding surface is opposite to the second molding surface, the centerline of the first molding surface coincides with the centerline of the second molding surface, and the geometric centerline of the first mold piece coincides with the centerline of the second molding surface. There is a predetermined deviation between the geometric centerlines of the two dies. 8. The mold according to claim 7, wherein the first mold piece and the second mold piece respectively comprise a base and a main body arranged on the base, the first molding surface and the The second molding surfaces are respectively formed on one surface of the corresponding main body. 9. The mold according to claim 8, wherein the base and the main body are respectively a cylindrical structure.

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