Bent pen mouth forming die

Abstract

The utility model discloses a bent pen mouth forming die. The bent pen mouth forming die comprises a front die assembly, a rear die assembly and a press-fit positioning mechanism. The front mold assembly comprises a front mold mounting plate, a front mold plate, a front mold pressing plate, a first forming plate and a plurality of first forming inserts; the rear mold assembly comprises a rear mold mounting plate, a rear mold plate, a rear mold pressing plate, a second forming plate and a plurality of second forming inserts; a positioning structure is arranged between the first forming plate and the second forming plate; by arranging the positioning structure, the tightness of positioning and attaching of the positioning plate and the second positioning plate can be guaranteed, the forming quality is guaranteed, and the damage rate and the manufacturing cost are reduced; the press-fit positioning structure is arranged to provide various mold closing positioning, so that the press-fit positioning stability of the first forming plate and the second forming plate is ensured, burrs are reduced, and the product forming quality is ensured; the detachable connection is adopted, so that single replacement of the first forming insert or the second forming insert is facilitated, overall replacement is not needed, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of curved pen tip forming moulds, in particular to a curved pen tip forming mould. Background Art

[0002] like Fig.10 The curved pen nozzle shown is one of the main components of a cosmetic brush. Existing curved pen nozzles are all manufactured using molding molds, but the existing curved pen nozzle molding molds only perform external overall positioning by means of guide rods, have fewer positioning mechanisms, and have low positioning accuracy, which affects the subsequent molding quality of the curved pen nozzle; and the existing curved pen nozzle molding molds use a molding cavity formed between multiple first molding inserts and multiple second molding inserts to achieve the molding of the curved pen nozzle, but the existing multiple first molding inserts and multiple second molding inserts are mostly fixed on a molding plate in an integrated array. When the first molding insert or the second molding insert is damaged, they need to be replaced as a whole, which increases maintenance costs and strength. In addition, since there is no positioning mechanism between the first molding insert and the second molding insert, long-term high-temperature use will cause deformation of the molding cavity, which affects the subsequent molding quality of the curved pen nozzle. Utility Model Content

[0003] The utility model aims to solve the technical problems in the prior art that the bent pen tip molding mold has few positioning structures, resulting in reduced quality of the bent pen tip product and the generation of burrs, increasing the subsequent processing quality, and high maintenance costs.

[0004] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:

[0005] A curved pen tip molding mold, the curved pen tip molding mold is used for injection molding of the curved pen tip part of a cosmetic pen, the curved pen tip molding mold comprises a front mold assembly and a rear mold assembly, a guide column assembly and a pressing and positioning mechanism are arranged between the front mold assembly and the rear mold assembly; the front mold assembly comprises a glue injection assembly, a front mold mounting plate, a front mold plate and a front mold pressing plate, the front mold pressing plate is provided with a first glue injection flow channel and a first molding plate, the first glue injection flow channel is connected and communicated with the glue injection assembly; the first molding plate is provided with a plurality of first molding inserts; the rear mold assembly comprises a rear mold mounting plate, a rear mold plate and a rear mold pressing plate, the rear mold pressing plate is provided with a second molding plate The second molding plate is provided with a plurality of through holes, the rear template is provided with two fixed plates, the fixed plates are provided with a plurality of second molding inserts, the second molding inserts are respectively arranged in the through holes, and pass through the end surface of the second molding plate through the through holes; the first molding inserts are respectively connected with the second molding inserts when the mold is closed; a positioning structure is provided between the first molding plate and the second molding plate; the first molding plate and the first molding insert, and the fixed plate and the second molding insert are all detachably connected; the front template, the front mold plate, the rear template and the rear mold plate are all provided with a cooling pipe structure.

[0006] As a further improvement, the front mold mounting plate is provided with a mounting hole and two mounting grooves, the glue injection assembly is arranged in the mounting hole, the glue injection assembly includes a glue injection gun head, and the glue injection gun head is provided with a bevel; the mounting grooves are provided with a first mounting block, and the first mounting blocks are provided with a plurality of first push rods; the first glue injection flow channel includes a glue collection port and two groups of glue injection flow channel groups, the glue collection port is connected and communicated with the glue outlet of the glue injection gun head, and both ends of the glue collection port are provided with collecting flow channels, and the collecting flow channels are respectively connected and communicated with the glue injection flow channel groups; the glue injection flow channel group includes two flow channels one, the flow channel one is provided with two glue outlet ports one, and the glue outlet ports one are connected and communicated with the first molding plate.

[0007] As a further improvement, the front mold plate is provided with two installation grooves, the first molding plate includes two positioning plates, and the positioning plates are respectively arranged in the installation grooves; the first molding plates are provided with multiple installation through holes, and multiple first molding inserts are respectively arranged in the installation through holes, and the installation through holes are provided with first positioning grooves, and multiple first molding inserts are provided with first protrusions that cooperate with the first positioning grooves; the positioning plates are provided with multiple glue outlet channels, and the glue outlet channels are connected to the second molding plates.

[0008] As a further improvement, the rear mold plate is provided with two mounting grooves 2, the second molding plate includes two positioning plate assemblies 2, and the two positioning plate assemblies 2 are respectively arranged in the mounting grooves 2; the positioning plate assemblies 2 each include a connecting base and a positioning plate 2, and the positioning plate 2 is arranged on the connecting base; the positioning plate 2 is provided with a plurality of molding cavities 2, the molding cavities 2 are each provided with a glue injection port 2, the glue injection port 2 is each provided with a glue injection channel 2, and the glue injection channel 2 is respectively connected to the glue outlet channel 1; the molding cavity 2 is also provided with a molding through hole 2 for inserting the first molding insert.

[0009] As a further improvement, the positioning structure includes a plurality of positioning protrusions and a plurality of positioning grooves, the positioning protrusions each include two positioning convex blocks and a central positioning protrusion, the positioning grooves each include two side positioning grooves and a central positioning groove, the two positioning protrusions are arranged on the second positioning plate in a mirror-image manner, the central positioning protrusion is arranged on the center line of the positioning plate, the two side positioning grooves are arranged on the positioning plate in a mirror-image manner, and the center positioning groove is arranged on the center line of the second positioning plate;

[0010] The positioning protrusions are all provided with a slope one, and the side positioning grooves are all provided with a slope two that matches the slope one; the center positioning protrusion is provided with a slope three and an arc surface three, and the center positioning groove is provided with a slope four that matches the slope three and an arc surface four that matches the arc surface three; the glue injection channel two and the molding through hole two both pass through the center positioning groove; the first molding inserts all pass through the center positioning protrusion.

[0011] As a further improvement, the first molding inserts are each provided with a molding groove, the molding groove is provided with two molding cavities; the molding groove is provided with an arc surface; the second molding inserts each include a second connecting rod and an elbow molding part, the elbow molding part is arranged at the end of the second connecting rod, and the elbow molding part is arranged in the second molding cavity; a cover body molding cavity is formed between the elbow molding part and the second molding cavity, and a pen tip molding cavity is formed between the cover body molding cavity and the molding groove; the elbow molding part is also provided with two positioning protrusions.

[0012] As a further improvement, the pressing and positioning mechanism includes a first positioning pressing component and a second positioning pressing component, the first positioning pressing component is arranged on the front mold plate, and the second positioning pressing component is arranged on the rear mold plate; the first positioning pressing component includes two groups of first positioning pressing block groups and multiple groups of positioning guide rod groups; the two groups of the first positioning pressing block groups are each composed of two first positioning pressing blocks; the multiple groups of the positioning guide rod groups each include two positioning guide rods arranged in mirror image relative to each other; the inner side of the first positioning pressing block is provided with a first inclined surface

[0013] The second positioning and pressing assembly includes two groups of second positioning pressure block groups, and the two groups of second positioning pressure block groups are respectively arranged on the outer side of the second positioning plate; the two groups of second positioning pressure block groups each include two second positioning pressure blocks arranged in a mirror image with each other, a positioning notch is provided between the two second positioning pressure blocks, and the outer side of the second positioning pressure blocks is provided with a second inclined surface matching the first inclined surface; the second positioning pressure blocks are provided with a plurality of positioning holes for inserting positioning guide rods.

[0014] As a further improvement, the cooling pipe structure includes multiple cooling pipes, and the multiple cooling pipes are provided with a liquid inlet and a liquid outlet; the cooling pipes are respectively arranged in the front mold plate, the positioning plate, the mounting base and the second positioning block.

[0015] As a further improvement, the guide column assembly includes multiple guide columns and multiple guide sleeve groups, each of the multiple guide sleeve groups includes multiple guide sleeves, and the multiple guide sleeves are respectively sleeved on the guide columns.

[0016] Compared with the prior art, the above one or more technical solutions in the curved pen tip forming mold provided by the embodiment of the utility model have at least one of the following technical effects:

[0017] The utility model provides a positioning structure to ensure the tightness of the positioning and fitting of the positioning plate and the second positioning plate, thereby ensuring the molding quality of the subsequent curved pen tip product, and provides the arc surface three and the arc surface four for buffering protection during mold closing, thereby reducing the damage to the molding surface caused by hard fitting, and adopts a positioning structure to reduce the damage rate and the manufacturing difficulty of the curved pen tip molding mold, thereby reducing the manufacturing cost of the curved pen tip molding mold; the pressing positioning structure is provided to provide a variety of mold closing positioning, thereby ensuring the pressing positioning of the first molding plate and the second molding plate, ensuring the subsequent first molding insert and the second molding The matching stability of the insert reduces the generation of burrs and ensures the quality of product molding; by setting a positioning protrusion and a molding cavity for matching positioning, the second molding insert and the first molding insert are guaranteed to be aligned to prevent deformation, thereby ensuring the molding quality of the product and the service life of the mold; in combination with the setting of an arc surface, it is used to ensure the smoothness and beauty of the end face of the bent pen mouth product, reduce the generation of burrs, reduce the steps of subsequent processing, and improve the one-time molding efficiency of the bent pen mouth product; by adopting a detachable connection, it is convenient to carry out a single replacement of the first molding insert or the second molding insert, without the need for overall replacement, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 This is a schematic diagram of the overall structure of the curved pen tip forming mold of this embodiment;

[0020] Figure 2 This is an exploded schematic diagram of the bending pen tip forming mold of this embodiment;

[0021] Figure 3 is a schematic structural diagram of the front mold plate of this embodiment;

[0022] Figure 4 This is a schematic diagram of the structure inside the curved pen tip forming mold of this embodiment;

[0023] Figure 5 for Figure 4 Schematic diagram of the decomposition of

[0024] Figure 6 is a schematic structural diagram of the positioning plate of this embodiment;

[0025] Figure 7 is a schematic structural diagram of the first molding insert of this embodiment;

[0026] Figure 8 is a schematic diagram of a second molding insert of this embodiment;

[0027] Fig. 9 It is a half-section schematic diagram of the first molding insert and the second positioning plate after being connected to each other in this embodiment;

[0028] Fig.10 This is a product schematic diagram of the curved pen tip of this embodiment. DETAILED DESCRIPTION

[0029] The following description is only a preferred embodiment of the present invention and does not limit the protection scope of the present invention.

[0030] For example, see the attached Figures 1 to 9A curved pen tip molding mold 1 is used for injection molding of the curved pen tip part of a cosmetic pen, the curved pen tip molding mold 1 includes a front mold assembly 2 and a rear mold assembly 3, a guide column assembly 4 and a pressing and positioning mechanism 5 are arranged between the front mold assembly 2 and the rear mold assembly 3; the front mold assembly 2 includes a glue injection assembly 20, a front mold mounting plate 21, a front mold plate 22 and a front mold pressing plate 24, the front mold pressing plate 24 is provided with a first glue injection flow channel 240 and a first molding plate 241, the first glue injection flow channel 240 is connected and communicated with the glue injection assembly 20; the first molding plate 241 is provided with a plurality of first molding inserts 242; the rear mold assembly 3 includes a rear mold mounting plate 30, a rear mold plate 31 and a rear mold pressing plate 32, the rear mold pressing plate 32 is provided with a second molding plate 33, the second molding plate 33 is provided with a plurality of through holes, the rear mold plate 31 is provided with two fixed The fixed plate 34 is provided with a plurality of second molding inserts 35, and the second molding inserts 35 are respectively arranged in the through holes and pass through the end surface of the second molding plate 33 through the through holes; the first molding inserts 242 are respectively connected with the second molding inserts 35 when the mold is closed; a positioning structure 6 is provided between the first molding plate 241 and the second molding plate 33; the first molding plate 241 and the first molding insert 242, and the fixed plate 34 and the second molding insert 35 are all detachably connected, and the detachable connection is convenient for single replacement of the first molding insert 242 or the second molding insert 35, without the need for overall replacement, thereby reducing maintenance costs; the front template 22, the front mold plate 24, the rear template 31 and the rear mold plate 32 are all provided with a cooling pipe structure 7.

[0031] The front mold mounting plate 21 is provided with a mounting hole and two mounting grooves, the glue injection component 20 is arranged in the mounting hole, the glue injection component 20 includes a glue injection gun head, and the glue injection gun head is provided with an inclined surface; the mounting grooves are provided with a first mounting block, and the first mounting blocks are provided with a plurality of first ejector rods; the first glue injection channel 240 includes a glue confluence port 240a and two groups of glue injection channel groups 240b, the glue confluence port 240a is connected and communicated with the glue outlet of the glue injection gun head, and both ends of the glue confluence port 240a are provided with converging channels 240c, and the converging channels 240c are respectively connected and communicated with the glue injection channel groups 240b; the glue injection channel group 240b includes two channels 240d, and the channels 240d are provided with two glue outlets 240e, and the glue outlets 240e are connected and communicated with the first molding plate 241.

[0032] The front mold plate 24 is provided with two installation grooves 1, and the first molding plate 241 includes two positioning plates 241a, and the positioning plates 241a are respectively arranged in the installation grooves 1; the first molding plate 241 is provided with multiple installation through holes 1, and multiple first molding inserts 242 are respectively arranged in the installation through holes 1, and the installation through holes 1 are provided with first positioning grooves, and multiple first molding inserts 242 are provided with first protrusions that cooperate with the first positioning grooves; the positioning plates 241a are provided with multiple glue outlet channels 1, and the glue outlet channels 1 are connected to the second molding plate 33.

[0033] The rear mold plate 32 is provided with two mounting grooves 2, and the second molding plate 33 includes two positioning plate assemblies 2 330, and the two positioning plate assemblies 2 330 are respectively arranged in the mounting grooves 2; the positioning plate assemblies 2 330 each include a connecting base 330a and a positioning plate 2 330b, and the positioning plate 2 330b is arranged on the connecting base 330a; the positioning plate 2 330b is provided with a plurality of molding cavities 2 330c, and the molding cavities 2 330c are each provided with a glue injection port 2 330d, and the glue injection port 2 330d is each provided with a glue injection channel 2 330e, and the glue injection channel 2 330e is respectively connected to the glue outlet channel 1; the molding cavity 2 330c is also provided with a molding through hole 2 for inserting the first molding insert 242.

[0034] The positioning structure 6 includes a plurality of positioning protrusions 60 and a plurality of positioning grooves 61, each of the positioning protrusions 60 includes two positioning convex blocks 600 and a central positioning protrusion 601, each of the positioning grooves 61 includes two side positioning grooves 610 and a central positioning groove 611, the two positioning protrusions 600 are arranged on the second positioning plate 330b in a mirror-image manner, the central positioning protrusion 601 is arranged on the center line of the positioning plate 241a, the two side positioning grooves 610 are arranged on the positioning plate 241a in a mirror-image manner, and the central positioning groove 611 is arranged on the center line of the second positioning plate 330b;

[0035] The positioning protrusions 600 are all provided with a slope 1 600a, and the side positioning grooves 610 are all provided with a slope 2 610a that matches the slope 1 600a; the center positioning protrusion 601 is provided with a slope 3 601a and an arc surface 3 601b, and the center positioning groove 611 is provided with a slope 4 611a that matches the slope 3 601a and an arc surface 4 611b that matches the arc surface 3 601b; the injection flow channel 2 330e and the molding through hole 2 both penetrate the center positioning groove 611; the first molding insert 242 all penetrate the center positioning protrusion 601, and the positioning structure 6 is used to ensure the tightness of the positioning and fitting between the positioning plate 241a and the positioning plate 2 330b, so as to ensure the molding quality of the subsequent bent pen tip product. By setting the arc surface three 601b and the arc surface four 611b for buffering protection during mold closing, the damage to the molding surface caused by hard fitting is reduced, and the positioning structure 6 is used to reduce the damage rate and the manufacturing difficulty of the bent pen tip molding mold 1, thereby reducing the manufacturing cost of the bent pen tip molding mold 1.

[0036] The first molding insert 242 is provided with a molding groove 242a, and the molding groove 242a is provided with two molding cavities 242b; the molding groove 242a is provided with an arc surface 242c; the second molding insert 35 includes a second connecting rod 350 and an elbow molding part 351, the elbow molding part 351 is arranged at the end of the second connecting rod 350, and the elbow molding part 351 is arranged in the second molding cavity 330c; the cover molding cavity 8 is formed between the elbow molding part 351 and the second molding cavity 330c, and the nib molding cavity 9 is formed between the cover molding cavity 8 and the molding groove 242a; the elbow molding part 351 is also provided with two positioning protrusions 351a, the positioning protrusion 351a is used to realize the positioning effect of the bent pen mouth product, and the arc surface 242c is used to ensure the smoothness and beauty of the end face of the bent pen mouth product, reduce the generation of burrs, reduce the steps of subsequent processing, and improve the one-time molding efficiency of the bent pen mouth product.

[0037] The pressing and positioning mechanism 5 includes a first positioning pressing assembly 50 and a second positioning pressing assembly 51. The first positioning pressing assembly 50 is arranged on the front mold plate 24, and the second positioning pressing assembly 51 is arranged on the rear mold plate 32. The first positioning pressing assembly 50 includes two groups of first positioning pressing block groups 500 and multiple groups of positioning guide rod groups 501. The two groups of the first positioning pressing block groups 500 are each composed of two first positioning pressing blocks; the multiple groups of the positioning guide rod groups 501 each include two positioning guide rods arranged in mirror image relative to each other; the inner side of the first positioning pressing block is provided with a first inclined surface

[0038] The second positioning and pressing assembly 51 includes two groups of second positioning block groups 510, and the two groups of second positioning block groups 510 are respectively arranged on the outer side of the second positioning plate 330b, and the two groups of second positioning block groups 510 each include two second positioning blocks that are arranged in a mirror image, and a positioning groove 512 is provided between the two second positioning blocks, and the outer side of each second positioning block is provided with a second inclined surface that cooperates with the first inclined surface; each second positioning block is provided with a plurality of positioning holes 513 for inserting positioning guide rods, and the pressing and positioning structure 6 is used to provide a variety of mold positioning, so as to ensure the pressing and positioning of the first molding plate 241 and the second molding plate 33, ensure the matching stability of the subsequent first molding insert 242 and the second molding insert 35, reduce the generation of burrs, and ensure the quality of product molding.

[0039] The cooling pipe structure 7 includes multiple cooling pipes, each of which is provided with a liquid inlet and a liquid outlet; the cooling pipes are respectively arranged in the front mold plate 24, the positioning plate 241a, the mounting base and the second positioning block 511, and the cooling pipe structure 7 is used to improve the cooling molding efficiency.

[0040] The guide post assembly 4 includes multiple guide posts and multiple guide sleeve groups, each of which includes multiple guide sleeves, and the multiple guide sleeves are respectively mounted on the guide posts. The guide post assembly 4 is used to ensure the stable closing and opening of the front mold assembly 2 and the rear mold assembly 3.

[0041] The utility model provides a positioning structure to ensure the tightness of the positioning and fitting of the positioning plate and the second positioning plate, thereby ensuring the molding quality of the subsequent curved pen tip product, and provides the arc surface three and the arc surface four for buffering protection during mold closing, thereby reducing the damage to the molding surface caused by hard fitting, and adopts a positioning structure to reduce the damage rate and the manufacturing difficulty of the curved pen tip molding mold, thereby reducing the manufacturing cost of the curved pen tip molding mold; the pressing positioning structure is provided to provide a variety of mold closing positioning, thereby ensuring the pressing positioning of the first molding plate and the second molding plate, ensuring the subsequent first molding insert and the second molding The matching stability of the insert reduces the generation of burrs and ensures the quality of product molding; by setting a positioning protrusion and a molding cavity for matching positioning, the second molding insert and the first molding insert are guaranteed to be aligned to prevent deformation, thereby ensuring the molding quality of the product and the service life of the mold; in combination with the setting of an arc surface, it is used to ensure the smoothness and beauty of the end face of the bent pen mouth product, reduce the generation of burrs, reduce the steps of subsequent processing, and improve the one-time molding efficiency of the bent pen mouth product; by adopting a detachable connection, it is convenient to carry out a single replacement of the first molding insert or the second molding insert, without the need for overall replacement, thereby reducing maintenance costs.

[0042] The present invention is not limited to the above-mentioned embodiments. Other molds for bending pen tips obtained by using the same or similar structures or devices as the above-mentioned embodiments of the present invention are all within the protection scope of the present invention.

Claims

1. A curved pen tip molding mold, which is used for injection molding of the curved pen tip part of a cosmetic pen, characterized in that: The curved pen tip forming mold comprises a front mold assembly and a rear mold assembly, a guide column assembly and a pressing and positioning mechanism are arranged between the front mold assembly and the rear mold assembly; the front mold assembly comprises a glue injection assembly, a front mold mounting plate, a front mold plate and a front mold pressing plate, the front mold pressing plate is provided with a first glue injection flow channel and a first molding plate, the first glue injection flow channel is connected and communicated with the glue injection assembly; the first molding plate is provided with a plurality of first molding inserts; the rear mold assembly comprises a rear mold mounting plate, a rear mold plate and a rear mold pressing plate, the rear mold pressing plate is provided with a second molding plate, the second molding plate is provided with a plurality of through holes, the rear The template is provided with two fixed plates, each of which is provided with a plurality of second molding inserts, which are respectively arranged in the through holes and pass through the end faces of the second molding plates through the through holes; the first molding inserts are respectively connected with the second molding inserts when the mold is closed; a positioning structure is provided between the first molding plate and the second molding plate; the first molding plate and the first molding insert, and the fixed plate and the second molding insert are all detachably connected; the front template, the front mold plate, the rear template and the rear mold plate are all provided with a cooling pipe structure.

2. The curved pen tip forming mold according to claim 1, characterized in that: The front mold mounting plate is provided with a mounting hole and two mounting grooves, the glue injection assembly is arranged in the mounting hole, the glue injection assembly includes a glue injection gun head, and the glue injection gun head is provided with an inclined surface; the mounting grooves are provided with a first mounting block, and the first mounting blocks are provided with a plurality of first push rods; the first glue injection flow channel includes a glue confluence port and two groups of glue injection flow channel groups, the glue confluence port is connected and communicated with the glue outlet of the glue injection gun head, and both ends of the glue confluence port are provided with converging flow channels, and the converging flow channels are respectively connected and communicated with the glue injection flow channel groups; the glue injection flow channel group includes two flow channels one, the flow channel one is provided with two glue outlet ports one, and the glue outlet ports one are connected and communicated with the first molding plate.

3. The curved pen tip forming mold according to claim 2, characterized in that: The front mold plate is provided with two mounting grooves 1, and the first molding plate includes two positioning plates, and the positioning plates are respectively arranged in the mounting grooves 1; the first molding plates are provided with multiple mounting through holes 1, and multiple first molding inserts are respectively arranged in the mounting through holes 1, and the mounting through holes 1 are provided with first positioning grooves, and multiple first molding inserts are provided with first protrusions that cooperate with the first positioning grooves; the positioning plates are provided with multiple glue outlet channels 1, and the glue outlet channels 1 are connected and communicated with the second molding plates.

4. The curved pen tip forming mold according to claim 3, characterized in that: The rear mold plate is provided with two mounting grooves 2, the second molding plate includes two positioning plate assemblies 2, and the two positioning plate assemblies 2 are respectively arranged in the mounting grooves 2; the positioning plate assemblies 2 each include a connecting base and a positioning plate 2, and the positioning plate 2 is arranged on the connecting base; the positioning plate 2 is provided with a plurality of molding cavities 2, the molding cavities 2 are provided with two glue injection ports, the two glue injection ports are provided with two glue injection channels, and the two glue injection channels are respectively connected to the one glue outlet channel 1; the molding cavity 2 is also provided with two molding through holes for inserting the first molding insert.

5. The curved pen tip forming mold according to claim 4, characterized in that: The positioning structure includes a plurality of positioning protrusions and a plurality of positioning grooves, each of the positioning protrusions includes two positioning convex blocks and a central positioning protrusion, each of the positioning grooves includes two side positioning grooves and a central positioning groove, the two positioning protrusions are arranged on the second positioning plate in a mirror-image manner, the central positioning protrusion is arranged on the center line of the positioning plate, the two side positioning grooves are arranged on the positioning plate in a mirror-image manner, and the center positioning groove is arranged on the center line of the second positioning plate; The positioning protrusions are all provided with a slope one, and the side positioning grooves are all provided with a slope two that matches the slope one; the center positioning protrusion is provided with a slope three and an arc surface three, and the center positioning groove is provided with a slope four that matches the slope three and an arc surface four that matches the arc surface three; the glue injection channel two and the molding through hole two both pass through the center positioning groove; the first molding inserts all pass through the center positioning protrusion.

6. The curved pen tip forming mold according to claim 5, characterized in that: The first molding inserts are all provided with a molding groove, and the molding groove is provided with two molding cavities; the molding groove is provided with an arc surface; the second molding inserts all include a second connecting rod and an elbow molding part, the elbow molding part is arranged at the end of the second connecting rod, and the elbow molding part is arranged in the second molding cavity; a cover body molding cavity is formed between the elbow molding part and the second molding cavity, and a pen tip molding cavity is formed between the cover body molding cavity and the molding groove; the elbow molding part is also provided with two positioning protrusions.

7. The curved pen tip forming mold according to claim 6, characterized in that: The pressing and positioning mechanism comprises a first positioning pressing assembly and a second positioning pressing assembly, wherein the first positioning pressing assembly is arranged on the front mold pressing plate, and the second positioning pressing assembly is arranged on the rear mold pressing plate; the first positioning pressing assembly comprises two groups of first positioning pressing block groups and multiple groups of positioning guide rod groups; the two groups of the first positioning pressing block groups are each composed of two first positioning pressing blocks; the multiple groups of the positioning guide rod groups each comprise two positioning guide rods arranged in mirror image relative to each other; the inner side of each of the first positioning pressing blocks is provided with a first inclined surface The second positioning and pressing assembly includes two groups of second positioning pressure block groups, and the two groups of second positioning pressure block groups are respectively arranged on the outer side of the second positioning plate; the two groups of second positioning pressure block groups each include two second positioning pressure blocks arranged in a mirror image with each other, a positioning notch is provided between the two second positioning pressure blocks, and the outer side of the second positioning pressure blocks is provided with a second inclined surface matching the first inclined surface; the second positioning pressure blocks are provided with a plurality of positioning holes for inserting positioning guide rods.

8. The curved pen tip forming mold according to claim 7, characterized in that: The cooling pipe structure includes multiple cooling pipes, and the multiple cooling pipes are provided with a liquid inlet and a liquid outlet; the cooling pipes are respectively arranged in the front mold plate, the positioning plate, the mounting base and the second positioning block.

9. The curved pen tip forming mold according to claim 8, characterized in that: The guide column assembly includes a plurality of guide columns and a plurality of guide sleeve groups. The plurality of guide sleeve groups each include a plurality of guide sleeves, and the plurality of guide sleeves are respectively sleeved on the guide columns.

Images