TWI689401B - Mold - Google Patents

Abstract

A mold includes a first plate with a first through hole, a second plate with a second through hole, a third plate with a third through hole, a first spacer, a second spacer, a first mold core, and a second mold core. The second plate is disposed in the first plate, and the first spacer and the second spacer are disposed between the first plate and the second plate. When the third plate is disposed, one plane of the third plate is in contact with the first plate and the second plate, and the first through hole, the second through hole and the third through hole are in connection. The first mold core and the second mold core are respectively disposed into the second through hole and the third through hole, a cavity is formed between the first mold core and the second mold core, and the cavity is connected with the second through hole. The optical lens produced by this mold has an outer diameter, which center corresponding to the center of the surface of the optical lens.

Description

Mould

The present invention relates to an injection molding die, and more particularly to an injection molding die for manufacturing optical lenses.

The process of making optical lenses with injection molding machines and molds has a long history. In order to reduce manufacturing costs, plastic optical lenses have gradually replaced traditional glass optical lenses.

Traditionally used in the molds for making plastic optical lenses, bushings are used, and the mold core can be worn in the bushings. Traditional molds are prone to deviations between the center of the outer diameter of the lens and the center of the curved surface due to accuracy, which can lead to lens eccentricity errors, which will affect the quality of the lens.

An example of the present invention provides a mold that can be used in an injection molding machine. The mold mold at least includes two device plates, two mold plates, two mold cores, and a bushing set respectively provided on the fixed side and the movable side. The two mold cores are respectively The first mold kernel and the second mold kernel. The two device plates are respectively connected with the fixed side mold plate and the movable side mold plate of the injection molding machine, and the two template plates are respectively connected with the corresponding device plates. The bushing group includes two bushes, which are respectively set in the two templates. One of the bushes is composed of at least a first template, a second template, a first gasket and a second gasket. The other bushing includes a third template. The first template has a first perforation, the second template There is a second perforation, the second template may be disposed in the first perforation of the first template, and the second perforation is located in the first perforation, or the first perforation communicates with the second perforation. In addition, the first gasket and the second gasket may be disposed between the first template and the second template. Similarly, the third template of the other bushing has a third perforation that can be used to accommodate the mold core. When the mold is in a closed state, the surface of the third template is in contact with the surfaces of the first template and the second template at the same time, and the first, second, and third perforations communicate with each other. In addition, the first die kernel extends into the second perforation during placement, the second die kernel extends into the third perforation during placement, and the first die kernel and the second die kernel form a die between the two during the placement The cavity can be regarded as a first space, and the first space and the second perforation form a communication state.

Yet another example of the present invention provides a mold for use in an injection molding machine. The mold can be divided into a fixed side and a movable side. The mold includes two device plates, two mold plates, two mold cores, and a bushing set respectively provided on the fixed side and the movable side. The two templates are the first template and the second template, and the two mold kernels are the first mold kernel and the second mold kernel, respectively. The two device plates are respectively connected with the fixed side plate and the movable side plate of the injection molding machine, the first template and the second template are respectively connected with the device plate, and the bushing set includes a first bushing, a second bushing, and a third bushing Sleeve, first gasket and second gasket. The first bushing has a first hole and a fitting portion, the first bushing can be provided in the first template; the second bushing has a second hole, the second bushing can fit the first bushing, and is placed on the first A template; and the first gasket and the second gasket can be placed between the side wall of the first bush and the side wall of the second bush; the third bush has a third hole and a fitting portion, the third bush It can be set in the second template. The first mold core can be sleeved in the first hole when being installed, and the other end of the first mold core can be sleeved in the second hole; the second mold can be sleeved in the third hole when being arranged. When closing the mold, the first plane of the second template can be the same as the first plane of the first template The mating parts of the first bushing fit with the fitting parts of the third bushing, and the first mold core and the second mold core form a first space, and the first space can be combined with the second bush The second hole communicates.

In an example of the present invention, the position of the perforation of one of the bushes relative to the mold core can be adjusted by the spacer so that the outer diameter center of the formed optical lens defined by the perforation is defined by the mold core The face center of the optical lens corresponds.

In order to make the above and other objects, features, and advantages of the present invention more comprehensible, preferred embodiments are described below in conjunction with the accompanying drawings, which are described in detail below.

10, 10A: bushing set

12, 14, 16, 32, 34: template

121, 141, 141a, 141b, 161: perforated

122, 122’, 402: protruding

123: outer surface

124: inner surface

125, 126, 144, 145, 403, 423: side wall

127: housing space

128, 142, 162, 322, 342: flat

143, 424: gap

146: Push noodles

18, 20: Gasket

22, 24: Mo Ren

221: molding structure

241: molding structure

26: mold cavity

28: Optical lens

C _F : Face center

D: outer diameter

_CD : outer diameter center

30: Positioning pin

36: Push block

40, 42, 44: bushing

321,341: opening

401, 421, 421a, 421b, 441: holes

442: Depression

50, 52: device board

54: Injection molding machine

FIG. 1 is an exploded schematic view of a bushing set and a mold core of a mold of an example of the present invention.

FIG. 2 is a schematic diagram of an assembled state of two templates, mold cores and spacers according to an example of the present invention.

FIG. 3 is a schematic view along the A-A section of FIG. 2 according to an example of the present invention.

4 is a schematic view of the assembled state of the bushing assembly and mold core of the mold of an example of the present invention.

FIG. 5 is a schematic view along the B-B cross section of FIG. 4 according to an example of the present invention.

6 is a schematic diagram of an optical lens of an example of the present invention.

FIG. 7 is a schematic diagram of two templates and spacers in another example of the present invention.

8 is a schematic view of a bushing assembly of a mold of another example of the present invention.

9 is a schematic view of the assembled state of the bushing and the mold core of another example of the present invention.

FIG. 10 is a schematic view taken along the line C-C of FIG. 9 according to another example of the present invention.

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description with reference to one of the preferred embodiments of the drawings. The directional terms mentioned in the following embodiments, for example: up, down, left, right, front or back, etc., the directional terms are used to illustrate rather than limit the present invention. In the drawings, unless otherwise specified, the dimensions of some components may be exaggerated rather than drawn to actual scale. Figures 1, 2, 4, 7, 8, and 9 are drawn at actual scales.

In an example of the present invention, the mold is a mold that can be applied to an injection molding machine, and the mold is divided into a fixed side and a movable side according to its mobility in the manufacturing process. In the injection molding process, the fixed side is essentially fixed on the fixed side plate of the injection molding machine, and the movable side is connected to the movable side plate of the injection machine, and the mold is opened and closed by the movement of the movable side.

Please refer to FIG. 5, which illustrates a schematic diagram of the mold of the present invention in an embodiment. As can be seen from the figure, in one example, the mold of the present invention includes templates 32, 34, device plates 50, 52, a bushing group 10, and mold cores 22, 24 drawn in dashed lines. FIG. 5 also depicts the injection molding machine 54 to express the positional relationship of the bushing set 10, the template 32, 34, the device plates 50, 52 and the injection molding machine 54 in the mold.

More specifically, please refer to FIG. 4 and FIG. 5 together. FIG. 4 is a schematic diagram of the assembly state of the bushing set and mold core of the mold in an embodiment of the present invention. FIG. 5 is an example of the present invention along the BB of FIG. 4 Schematic diagram of the profile. In application, both sides of the bushing group 10 in this example can be connected to the device plates 50 and 52 via the templates 32 and 34, respectively. The device plates 50 and 52 can be fixed on the mold on the corresponding side of the injection molding machine 54. More specifically, the two device plates 50 and 52 are used to connect with the fixed side plate and the movable side plate of the injection molding machine 54 respectively. The two mold plates 32 and 34 are connected to the device plates 50 and 52 respectively. The bushing group 10 The template 12 is disposed in the opening 321, and the template 16 is disposed in the opening 341. When closing the mold, the plane of the template 32 322 corresponds to the plane 342 of the template 34, the template 16 and the template 12 are assembled together, wherein the plane 162 can be in contact with the plane 128 and the plane 142, and the perforations 121, 141 and 161 are in communication. In one example, the template 12 and the template 16 are assembled by the positioning pin 30 and the corresponding fixing structure 343.

Next, the design of the bushing group 10 will be explained. Please refer to FIG. 1. FIG. 1 is an exploded view of a bushing set 10 and mold cores 22 and 24 included in a mold of an example of the present invention. As shown in FIG. 1, the bushing group 10 includes a template 12 (for example, called a first template), a template 14 (for example, called a second template), a template 16 (for example, called a third template), and a gasket 18 (For example, it is called a first gasket), and gasket 20 (for example, a second gasket).

In this example, the form plates 32, 34 and the device plates 50, 52 are each a plate-shaped steel block. The template 32 has an opening 321 (for example, called a first opening), and the template 34 has an opening 341 (for example, called a second opening). The openings 321 and 341 can be selectively perforated, or only in a concave shape. In this example, the openings 321 and 341 are not perforated.

In addition, please refer to FIG. 1 again. The template 12 is substantially a rectangular metal block. The template 12 has an outer surface 123 facing the injection machine and an inner surface 124 facing the opposite direction. The center of the template 12 has a circular perforation 121 (for example, called a first perforation). The perforation 121 vertically penetrates the outer surface 123 and the inner surface 124. The four corners of the inner surface 124 are provided with protrusions 122 (according to the location) The difference in position can be referred to as a first protrusion and a second protrusion respectively. Each protrusion 122 has a side wall 125 and a side wall 126 that are perpendicular to each other. In one example, the side wall 125 of the protrusion 122 is lateral ( X direction), the side wall 126 is longitudinal (Y direction), the four protrusions 122 form an installation space 127 on the inner surface 124, and the four protrusions 122 each have a plane 128 (for example, a first plane called a first template) ) Face template 16. In this example, each protrusion 122 is provided with a positioning pin 30 extending in the direction of the normal vector of the plane 128.

In this example, the template 14 is a generally cross-shaped metal block with four notches 143, and the notch 143 has side walls 144 and side walls 145 that are perpendicular to each other. The center of the template 14 has a perforation 141 (for example, called a second perforation). The perforation 141 is formed by two concentrically arranged perforations 141a and 141b with different outer diameters. The aperture of the perforation 141a is smaller than the aperture of the perforation 141b. The perforation 141a is closer to the template 12.

In this example, the template 16 is a square metal block, the center of the template 16 has a through hole 161 (for example, called a third through hole), and the template 16 has a plane 162 (for example, called the first plane of the third template) facing The inner surface 124 of the template 12.

In this example, the gasket 18 and the gasket 20 are rectangular metal blocks, and the gasket 18 and the gasket 20 may have the same or different thicknesses.

In this example, the mold core 22 (for example, called the first mold core) and the mold core 24 (for example, called the second mold core) are substantially cylindrical cylindrical metal blocks, and one end of the mold cores 22, 24 It has a molding surface corresponding to the molding object. In one example, one end of the mold core 22 has a molding structure 221, and one end of the mold core 24 has a molding structure 241 (shown in FIG. 5 described later). The molding structures 221 and 241 may be convex or concave, respectively, and the invention is not limited thereto.

FIG. 2 is a schematic top view of the assembled state of the two templates 12, 14, the mold core 22, and the spacers 18, 20 according to an example of the present invention. FIG. 3 is a schematic view along the A-A section of FIG. 2 according to an example of the present invention. As shown in FIGS. 1, 2 and 3, after the installation is completed, the template 14 is placed in the placement space 127 (shown in FIG. 1) of the template 12, and each protrusion 122 is placed in the notch 143. The plane 128 and the plane 142 of the template 14 are substantially coplanar, and the through hole 141 and the through hole 121 communicate with each other. In one example, the number of spacers 18 is four, which are respectively disposed between the side walls 125 of the four protrusions 122 and the side walls 144 of the notch 143 of the template 14, and the number of spacers 20 is four, which are respectively provided on the four protrusions The gap between the side wall 126 of 122 and the template 14 Between the side walls 145 of the 143, the gasket 18 and the gasket 20 have the same or different thicknesses, wherein the thickness of the gasket 18 is increased or decreased to adjust the Y direction of the template 14 in the installation space 127 of the template 12 The displacement is increased or decreased by the thickness of the spacer 20 to adjust the X-direction displacement of the template 14 in the installation space 127 of the template 12.

Following the above description, FIG. 6 is a schematic diagram of an optical lens according to an example of the present invention. Please refer to FIGS. 3, 5 and 6 together. The molding structure 221 of the mold core 22 has a profile center C _F , which defines the profile center of a surface of the manufactured optical lens 28. The inner wall of the perforation 141b exposes the mold cavity, thereby defining the outer diameter portion of the optical lens 28 that is manufactured. Adjust the position of the template 14 in the template 12 by selecting the thickness of the gaskets 18 and 20 in the X and Y directions, that is, by setting the gaskets 18 and 20, the template can be adjusted while the mold core 22 is fixed perforation of 14,114 with respect to the mold core 22, so that the optical lens defined by the perforated side wall 141b within the outer diameter D of the outer diameter 28 of the center C _D may be defined by the mold core and the optical center of the lens surface of the type of C _F 28 Correspondingly, to improve the lens eccentricity problem caused by the mold tolerance. In addition, in another example, the template 16 may also be the same design as the template 12 in which the gaskets 18, 20 and the template 14 are provided, which will not be repeated here.

Please refer to FIG. 3, FIG. 4 and FIG. 5 at the same time, the mold core 22 is disposed in the through hole 121, and one end of the mold core 22 extends into the through hole 141a and the through hole 141b. In one example, the mold core 22 and the through hole 141a are inside The wall fits, and one end of the mold core 22 having the molding structure 221 is inserted into the through hole 141b. The mold core 24 extends into the through hole 161. The mold core 22 and the mold core 24 correspond to each other and form a mold cavity 26 (for example, referred to as a first space). The mold cavity 26 and the perforation 141b form a communication state. The mold cavity 26 and the perforation 141b are for injection of hot melt plastic. After cooling, The fixed-side templates 12, 32 and the device board 50 are fixed; and the movable-side templates 16, 34 and the device board 52 are driven away from the template 12 by the movable side disc of the injection machine 54 and the workpiece falls out, that is, the optical lens of the workpiece Finished.

7 is a schematic diagram of two templates and gaskets according to yet another example of the present invention. As shown in FIG. 7, protrusions 122 and 122 ′ are provided at two diagonal corners of the inner surface 124 of the template 12, and one of the protrusions 122 is perpendicular to each other. The side wall 125 and the side wall 126, the template 14 has a notch 143, and a corner of the template 14 has a pushing surface 146, the template 14 is disposed on the template 12, the protrusion 122 is placed in the notch 143, and the pushing surface 146 of the template 14 faces the protrusion 122', and the gasket 18 is disposed between the side wall 144 of the notch 143 and the protruding side wall 125, and the gasket 20 is disposed between the side wall 145 of the notch 143 and the protruding side wall 126, wherein the template 12 and the template 14 A wedge-shaped pushing block 36 is further provided between the pushing surface 146 and the protrusion 122', so as to push the pushing surface 146 of the template 14 by the pushing block 36, and fix the template 14 to the gasket 18, the gasket 20 and the protrusion Out of 122'.

8 is a schematic view of a bushing set of a mold of another example of the present invention. In yet another example of the present invention, the bushing set 10A includes a bushing 40 (such as a first bushing) and a bushing 42 (such as a bushing). Second bushing), bushing 44 (referred to as a third bushing, for example), gasket 18 and gasket 20.

The bush 40 can be a variation of the template, which is essentially a rectangular metal block. The center of the bush 40 has a hole 401 (for example, called a first hole), and four protrusions 402 are provided at four corners of the bush 40 At the joint, the bushing 40 defines a mounting space (not numbered) by four protrusions 402 at its four corners. The bushing 40 is similar to the template 12 described above, and some structures will not be repeated here.

The bush 42 can be a variation of the template, which is essentially a cross-shaped metal block with four notches 424. The center of the bush 42 has a hole 421 (for example, called a second hole). The hole 421 consists of two concentric but The through holes 421a and 421b of different outer diameters are connected to each other, and the hole diameter of the hole 421a is smaller than that of the hole 421b. The bushing 42 is similar to the template 14 described above, and some structures will not be repeated here.

The bush 44 may be a variation of the template, which is essentially a rectangular metal block. The center of the bush 44 has a hole 441 (such as a third hole), and four corners of the bush 44 are provided with four recesses The depression 442 serves as a fitting portion. The bushing 44 is similar to the template 16 described above, and some structures will not be repeated here.

The gasket 18 and the gasket 20 are rectangular metal blocks, and the gasket 18 and the gasket 20 may have the same or different thicknesses.

9 is a schematic diagram of the assembly state of the bush and the mold core of another example of the present invention, and FIG. 10 is a schematic diagram of another example of the present invention along the CC cross section of FIG. 9, wherein FIG. 10 further draws a template 32 (such as Is the first template), template 34 (for example, called the second template), device plates 50, 52 and injection molding machine 54 to express the bushing set 10 and the mold core 22, 24 relative to the template 32, 34, device The positional relationship of the plates 50, 52 and the injection molding machine 54. As shown in FIG. 8, FIG. 9 and FIG. 10, the bush 40 is disposed in the opening 321 of the template 32, the bush 42 is sleeved on the bush 40, and is disposed in the template 32. In one example, the bush 42 is disposed in the mounting space of the bush 40, each protrusion 402 is placed in the notch 424, the hole 421 of the bush 42 communicates with the hole 401 of the bush 40, wherein the top of the protrusion 402 The surface (not labeled) will protrude from the bushing 42 so as to fit into the recess 442 of the bushing 44 later. When the mold core 22 is installed, one end is inserted into the hole 401, and the other end is inserted into the hole 401. The gasket 18 and the gasket 20 are disposed between the side wall 403 of the protrusion 402 of the bush 40 and the side wall 423 of the bush 42.

Following the above description, the bush 44 is placed in the opening 341 of the template 34, and when the mold core 24 is placed, one end of the bush 24 is placed in the hole 441. During mold clamping, a plane 322 of the template 32 (for example, the first plane referred to as the first template) corresponds to a plane 342 of the template 34, and the protrusion 402 of the bush 40 and the recess 442 of the bush 44 Nested with each other. After the mold core 22 and the mold core 24 are arranged, they correspond to each other and form a mold cavity 26, and the mold cavity 26 communicates with the hole 421b.

In this example, the protrusions 402 and the recesses 442 are mainly engaged with each other, so that the positioning pins do not need to use the positioning pins to position and combine the bushing 40 and the bushing 44. As by selecting the thickness of the spacer 18 and the spacer 20 to adjust the position of the liner 42 in the hub 40, such that the outer diameter of the center C _D of the aperture defined by the optical lens 42 of the bushing 421b 28 with outer diameter D C _F type center plane defined by the optical lens 28 corresponding to the mold core, was described in the previous example, it is omitted herein.

In summary, the mold of an example of the present invention can be adjusted by the thickness of the first gasket and the second gasket, and the position of the perforation in the bushing set used to define the outer diameter of the optical lens can be moved relative to the first mold core, so that Let the outer diameter center of the shaped optical lens defined by the perforation correspond to the center of the face shape of the optical lens defined by the mold core. Overcome the lens eccentricity problem caused by the cumulative tolerance variation after mold combination. In addition, the assembly of the two bushes can be assembled by setting a recess in one bush and a protrusion in the other bush, and the recess and the protrusion are nested together to assemble together, omitting the use of positioning pins.

Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention belongs can make some changes without departing from the spirit and scope of the present invention. Retouching, therefore, the protection scope of the present invention shall be subject to the scope defined in the appended patent application.

10: Bush set

12, 14, 16: template

121, 141, 141a, 141b, 161: perforated

122: protruding

123: outer surface

124: inner surface

125, 126, 144, 145: side wall

127: housing space

128, 162: flat

143: Notch

18, 20: Gasket

22, 24: Mo Ren

30: Positioning pin

221: molding structure

Claims (10)

A mold includes: a first template with a first perforation; a second template with a second perforation, the second template can be placed in the first template; a first gasket and a second gasket Sheet, the first gasket and the second gasket can be placed between the first template and the second template; a third template with a third perforation; the third template can be a first plane, During installation, it is in contact with the first plane of the first template and the first plane of the second template at the same time, and the first perforation, the second perforation, and the third perforation are in communication when placed; a first mold Ren, one end of the first die kernel extends into the second perforation when placed; a second die kernel, one end of the second die kernel extends into the third perforation when placed; and the first die Between the kernel and the second mold kernel, a first space can be formed during placement, and the second perforation and the first space can form a communication state. The mold according to item 1 of the patent application scope, wherein the first template has a surface with at least two protrusions, the second template is disposed on the surface between the two protrusions, wherein, the The first gasket and the second gasket are disposed between at least one of the two protrusions and the second template. The mold according to item 2 of the patent application scope, wherein the second template has at least one notch, each of the notches has two vertical side walls, and one of the first template One of the protrusions is disposed in the gap, the protrusion has two vertical side walls, the first gasket is disposed between one of the side walls of the gap and one of the side walls of the protrusion, the second gasket It is arranged between the other side wall of the notch and the other side wall of the protrusion. The mold described in item 2 of the patent application scope further includes a push block disposed on the surface and located between one of the two protrusions and the second template. The mold as described in item 2 of the patent application scope, wherein the top surfaces of the two protrusions are the first plane of the first template, and the first plane of the first template is the same as the first plane of the second template flat. The mold described in item 1 of the patent application scope, wherein the first space is a mold cavity, and a part of the surface of the second template exposes the mold cavity to define the shape of the mold cavity. A mold includes: a first template; a first bushing, provided with a first hole and a fitting portion, the first bushing can be placed in the first template; a second bushing, provided with a In the second hole, the second bushing can fit the first bushing and be placed in the first template; a first die kernel, when placed, one end of the first die kernel can be sleeved on the In the first hole, and the other end of the first mold core can be sleeved in the second hole; a first gasket and a second gasket can be arranged on the side wall of the first bush and the second Between the side walls of the bushing; a second template, a first plane of the second template can be correspondingly attached to the first plane of the first template; A third bushing provided with a third hole and a fitting portion, the third bushing can be placed in the second template; and a second mold core, one end of the second mold core can be sleeved on the first Among the three holes; wherein, the fitting portion of the first bushing and the fitting portion of the third bushing fit together, and the first mold core and the second mold core are arranged after being arranged A first space can communicate with the second hole of the second bush. The mold described in item 7 of the patent application range, wherein the first bushing has a surface, the fitting portion of the first bushing includes at least two protrusions disposed on the surface, and the second bushing is disposed on On the surface and between the two protrusions. The mold according to item 8 of the patent application scope, wherein the second bushing has at least one notch, each of the notches has two vertical side walls, and one of the protrusions of the first bushing is disposed in the notch , The protrusion has two vertical side walls, the first gasket is arranged between one of the side walls of the notch and one of the side walls of the protrusion, the second gasket is arranged on the other side wall of the notch Between the other side wall of the protrusion, the fitting portion of the third bushing includes at least two depressions, and the two depressions respectively cooperate with the two protrusions. The mold as described in item 7 of the patent application range, wherein the first space is a mold cavity, and an inner wall of the second hole exposes the mold cavity to define the shape of the mold cavity.

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