CN218053667U

CN218053667U - Novel mould

Info

Publication number: CN218053667U
Application number: CN202220986994.9U
Authority: CN
Inventors: 包彦水
Original assignee: Dongguan Youxiang Electronic Technology Co ltd
Current assignee: Dongguan Youxiang Electronic Technology Co ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-12-16
Anticipated expiration: 2032-04-26

Abstract

The utility model relates to a key cap mould field discloses a novel mould, include: the upper die is provided with a plurality of keycap-shaped protruding parts and serves as a male die, the upper die is provided with a plurality of detachable injection molding assemblies, and injection molding channels are arranged in the injection molding assemblies; the bed die is equipped with the recess that a plurality of is the key cap form and regards as the die, the four sides of recess make progress the arch and are equipped with the breach, compare with prior art, the beneficial effects of the utility model are that: the key cap adopting the mould for injection molding has good pattern continuity, the key cap is not easy to slip and wear, and the pattern is clear.

Description

Novel mould

Technical Field

The utility model relates to a key cap mould field especially relates to a novel mould.

Background

The key caps are usually fastened on the tops of the keys of the keyboard, and the functions or numbers and letter symbols of the corresponding keys are marked on the key caps, along with the development of the times, the key caps can not only display the functions, numbers, letters or symbols of the keys, but also can be printed with needed patterns according to the requirements of manufacturers or customers and are spliced and presented by a plurality of key caps, however, the splicing of the patterns of the key caps manufactured by the process is not continuous, and the patterns are easy to deform.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome between above-mentioned key cap and the key cap pattern connection not consistent not enough, aim at providing the technical scheme that can solve above-mentioned problem.

A novel mold, comprising: the upper die is provided with a plurality of keycap-shaped protruding parts and serves as a male die, a plurality of detachable injection molding assemblies are mounted on the upper die, and injection molding channels are arranged in the injection molding assemblies;

the lower die is provided with a plurality of keycap-shaped grooves and serves as a female die, and four sides of each groove are upwards protruded and provided with notches.

As one improvement of the technical scheme, the upper die is provided with a plurality of insertion ports for installing the injection molding assembly.

As one improvement of the above technical solution, the injection molding channel includes a first channel disposed along a longitudinal direction and a second channel disposed along a transverse direction, the first channel communicates with a middle section of the second channel, a terminal of the second channel is gradually reduced and curved, and a terminal outlet of the second channel is disposed at a side of the protrusion and in clearance fit with the protrusion.

As one improvement of the technical scheme, the injection molding component can be split along the middle lines of the first channel and the second channel.

As one improvement of the technical scheme, a main runner is arranged on the surface of the upper mold and communicated with the injection molding channel.

As an improvement of the above technical solution, the lower mold is provided with a plurality of positioning pillars, and the main runner of the upper mold is provided with an insertion port for installing the positioning pillars.

As one improvement of the technical scheme, the lower die is provided with a plurality of guide posts, and the upper die is provided with a plurality of holes for mounting the guide posts.

Compared with the prior art, the beneficial effects of the utility model are that: the pattern of the keycap formed by injection molding of the mold has good continuity, the keycap is not easy to slip and wear, and the pattern is clear.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a process flow diagram of the present invention.

Fig. 2 is a schematic diagram of printing a first line and a second line on a film in step a of the present invention.

Fig. 3 is a schematic diagram of the film protrusions formed on the film in step a of the present invention.

Fig. 4 is a schematic structural view of the stamping die of the present invention.

Fig. 5 is a schematic structural diagram of the bottom plate of the present invention.

Fig. 6 is a schematic structural view of the fixing plate of the present invention.

Fig. 7 is a schematic structural view of the injection mold of the present invention.

Fig. 8 is a schematic structural view of the upper die of the present invention.

Fig. 9 is a schematic structural view of the lower die of the present invention.

Fig. 10 is a schematic structural view of the injection molding assembly of the present invention.

Fig. 11 is a schematic structural view of the membrane of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described below clearly and completely, and it should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the embodiment of the utility model, a key cap manufacturing process:

a. as shown in fig. 1-3, printing lines on the test membrane 51 and forming membrane protrusions 520 corresponding to the shape of the keycaps, and confirming the shape and size of the membrane protrusions 520 according to the curve of the lines;

the step is sample preparation, namely, a test film 51 is selected and printed with a plurality of first lines 511 and a plurality of second lines 512 which are arranged longitudinally and transversely, the distance between the adjacent first lines 511 or second lines 512 is 0.5mm-1.2mm, the first lines 511 and the second lines 512 are perpendicular to each other, and then the test film 51 printed with the first lines 511 and the second lines 512 is placed in a stamping die to be stamped to form a film bulge 520, wherein it can be understood that the shape and size of the film bulge 520 correspond to the keycap to be produced, and after stamping, the first lines 511 and the second lines 512 on the film bulge 520 are bent or deformed to different degrees because of different keycap specifications (for example, the side surface and the top surface of the keycap are cambered surfaces or the side surface and the top surface of the keycap are planes).

b. Dividing the pattern into a plurality of color blocks and printing the color blocks on the film 5, wherein the film bulge 520 corresponding to the shape of the keycap is formed on the film 5, and the color blocks correspond to the film bulge 520;

determining the shape and size of the color block based on the data of the punch mold forming film convex part 520 and the bending or deformation data of the first line 511 and the second line 512 on the test film 51 in the step a, it is worth mentioning that the film 5 used in the step b participates in the subsequent steps and can be used as a part of the product, the test film 51 in the step a is not used, in order to ensure the accuracy of the data, the types of the films 5 selected in the step a and the step b are consistent, for example, the same type of PC/PS/PET film is selected;

regarding printing: color printing, silk screen printing, fractional printing or non-conductive vacuum plating of patterns (color blocks) on the film 5, wherein the ink can select high-temperature-resistant ink, the printing process needs to be carried out in a dust-free workshop and is printed on the back surface of the film 5, as can be understood, the outer surface of the film 5 is in contact with the outside, and the patterns can be protected by printing the patterns on the back surface of the film 5 (namely, after the film bulge 520 is formed, the color blocks are positioned on the inner side of the film bulge 520), each color block corresponds to one key, a gap exists between each color block and each color block, the specific gap and height ratio of a keycap is 1, and punching marks of positioning holes 6 need to be printed on the gaps between the color blocks; after printing, the ink is baked, specifically, the film 5 is baked at 90 ℃ for 1 hour, and then surface cleaning is performed (if stacking and placing are needed, a protective film can be coated);

and (3) punching according to the punching identification by using a punching device, controlling the precision within +/-0.05 mm, generally setting the number of the positioning holes 6 to be 4-6, and detecting whether the punching identification corresponds to the punching identification after punching is finished.

c. Separating the membrane bulge 520 from the membrane 5 and keeping the connecting belt 7 for fixing;

and (c) cutting part of the connection between the film bulge 520 and the film 5 by using a punching and shearing device, and reserving at least two symmetrically arranged connecting strips 7, wherein the width of the connecting strips 7 is 1mm-6mm, and the interval set in the step b is convenient for forming the connecting strips 7.

d. Injecting the film protrusion 520 to form a key cap;

the membrane 5 is placed in an injection mold, and the keycap is formed by injection molding of the membrane boss 520 through the injection mold.

As shown in fig. 4 to 6, the stamping dies used in the steps a and b specifically include: the bottom plate 911, the fixing plate 912 and the forming plate 913, be equipped with a plurality of shaping groove 915 on the bottom plate 911, be equipped with a plurality of shaping hole 917 on the fixing plate 912, be equipped with a plurality of protruding piece 914 on the forming plate 913, shaping groove 915, shaping hole 917 correspond with protruding piece 914, during the use, place membrane 5 on the bottom plate 911, will the fixing plate 912 is placed on membrane 5 and is pushed down membrane 5, use forming plate 913 to punch forming again, protruding piece 914 of forming plate 913 passes forming hole 917 and extrudes membrane 5 protruding part 520, it is preferred, be equipped with corresponding protruding ring 916 on the edge of a plurality of shaping grooves 915 of bottom plate 911 respectively, protruding ring 916 encircles shaping groove 915, be equipped with corresponding annular groove on the edge of a plurality of shaping holes 917 of fixing plate 912 (918) respectively, annular groove 918 encircles shaping hole 917, when fixing plate 912 is placed on bottom plate 911, protruding ring 916 is placed in annular groove 918, can understand, because need a plurality of shaping protruding parts 520 on the membrane 5, set up protruding ring 916 and annular groove 520 and can guarantee that each other protruding parts do not influence each other protruding processes in the membrane on the film.

As shown in fig. 7 to 10, the injection mold used in step d specifically includes: the key cap injection molding device comprises an upper mold 1 and a lower mold 2, wherein the upper mold 1 is provided with a plurality of keycap-shaped bosses 11 serving as male molds, the lower mold 2 is provided with a plurality of keycap-shaped grooves 21 serving as female molds, specifically, a film 5 is arranged on the lower mold 2, the outer sides of the film bosses 520 are attached to the inner sides of the grooves 21, the upper mold 1 and the lower mold 2 are combined, the bosses 11 are arranged in the grooves 21 to form injection molding cavities (a gap between the bosses 11 and the inner sides of the film bosses 520 arranged in the grooves is an injection molding cavity, and after the injection mold is closed, the tail end outlet of a second channel 312 is arranged above the gap), the keycaps can be formed by injection molding, in the technical scheme, a plurality of keycaps can be simultaneously injection molded, the bosses 11 or the grooves 21 are not limited to a fixed keycap shape, for example, a common numeric key, a letter key, a space key, a return key and the like, the upper mold 1 and the lower mold 2 can be simultaneously provided with the bosses 11 and the grooves 21, no matter that the bosses 11 are matched with the grooves 21, and the injection molding components 31 are installed, and the injection molding channel assemblies 31 can be detachably installed by injection molding, and the injection molding components 31 are also can be injection molding modules 3;

as shown in fig. 10, the injection molding channel 31 includes a first channel 311 disposed along a longitudinal direction and a second channel 312 disposed along a transverse direction, the first channel 311 is communicated with a middle section of the second channel 312, a terminal of the second channel 312 is gradually reduced and curved, a terminal outlet of the second channel 312 is disposed at a side of the protrusion 11 and is in clearance fit with the protrusion, the injection molding assembly 3 can be split along a center line of the first channel 311 and the second channel 312, specifically, the injection molding assembly 3 is formed by splicing a first component 32 and a second component 33 having the same shape and structure, a splicing surface of the first component 32 or the second component 33 is respectively provided with an arc-shaped groove, when the first component 32 and the second component 33 are spliced together, the arc-shaped grooves of the first component 32 and the second component 33 form the injection molding channel 31, a main channel 4 is disposed on a surface of the upper mold 2, a storage groove 8 is disposed at a terminal of the main channel 4, the main channel 4 is communicated with the injection molding channel 31, the first channel 311 and the second channel 312 are communicated with the injection molding channel 31, even if the main channel 31 is disconnected, the main channel 31 is connected with the injection molding channel 31, the injection molding assembly can be pulled out, and the injection molding assembly can be taken out completely, and the injection molding assembly can be taken out of the injection molding assembly can be taken out after the injection molding assembly is taken out.

Lower mould 2 is equipped with a plurality of reference column 901, is equipped with interface 101 on the sprue 4 of upper mould 2 and is used for installing reference column 9, and reference column 9 and interface 101 all are the locating hole 6 that corresponds the membrane, and lower mould 2 is equipped with a plurality of guide pillar 902, and upper mould 1 is equipped with a plurality of trompil 102 that is used for installing guide pillar 902, and the four sides of the recess 21 of lower mould 2 upwards protruding and be equipped with breach 100, and breach 100 is used for laying above-mentioned connecting band 7.

As shown in fig. 11, which is a drawing of the film 5 prepared in step c, it can be understood that the effect or pattern of the film 5 after injection molding in step d is similar to that of fig. 11, and the keycap is detached from the film after injection molding;

when a plurality of keycaps are arranged and assembled according to the keyboard manufacturing process, the patterns of the adjacent keycaps are connected.

Adopt above-mentioned key cap manufacturing process to realize the continuity of pattern between key cap and the key cap and guarantee its wearability: printing lines on the film and forming a film convex part, wherein the shape and the size of the film convex part can be confirmed according to the bending condition of the lines, and the patterns are divided into color blocks matched with the shape and the size of the film convex part based on the shape and the size of the film convex part, so that the patterns on the subsequently formed keycaps cannot deform; the formed keycaps can restore patterns after being arranged according to a certain rule, and the pattern has better continuity; the color blocks are separated from the color blocks, so that a film convex part and a connecting band are formed in the subsequent process, and positioning holes are formed in the separation positions to better help a stamping die to position; the locating hole and the connecting band on the membrane can play the effect of location, fixed and guide at the in-process of moulding plastics, because the reality of tolerance exists, there is the condition of discrepancy difference in the width of injection mold's one-tenth die cavity, consequently, on the basis of equal blowout volume, the plastics fluid can lead to the filling process to produce because of the width difference and involve, thereby realize automatic guide's effect, make the width size in clearance have the uniformity, ensure that the key cap of producing accords with the anticipated requirement.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A novel mold, comprising:

the upper die is provided with a plurality of keycap-shaped protruding parts and serves as a male die, the upper die is provided with a plurality of detachable injection molding assemblies, and injection molding channels are arranged in the injection molding assemblies;

2. The new mold as claimed in claim 1, wherein: the upper die is provided with a plurality of insertion ports for installing injection molding components.

3. The novel mold according to claim 1, characterized in that: the passageway of moulding plastics includes along the first passageway of vertical setting and along the second passageway of horizontal setting, the interlude intercommunication of first passageway and second passageway, the end of second passageway reduces gradually and is crooked form, the terminal export setting of second passageway is in the side of bellying and with clearance fit between.

4. A new mould according to claim 3, characterized in that: the injection molding assembly is separable along a centerline of the first channel and the second channel.

5. The new mold as claimed in claim 1, wherein: the surface of the upper die is provided with a main runner, and the main runner is communicated with the injection molding channel.

6. The new mold according to claim 5, characterized in that: the lower die is provided with a plurality of positioning columns, and the main runner of the upper die is provided with an inserting port for installing the positioning columns.

7. The new mold as claimed in claim 1, wherein: the lower die is provided with a plurality of guide pillars, and the upper die is provided with a plurality of holes for mounting the guide pillars.