CN214026984U

CN214026984U - Injection mold with symmetrical double-sprue structure

Info

Publication number: CN214026984U
Application number: CN202022738061.1U
Authority: CN
Inventors: 刘自福
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-08-24
Anticipated expiration: 2030-11-23

Abstract

The application discloses an injection mold with a symmetrical double-gate structure, which comprises gates, wherein the gates are symmetrical C-shaped and are provided with two tail ends communicated with a same mold cavity, and the two tail ends are arranged oppositely; the cross section of the pouring gate is gradually reduced from the middle part to the two ends. The injection mold has the advantages that the sprue is symmetrically arranged in a C shape, so that two tail ends which are oppositely arranged and communicated with the same mold cavity are formed on the sprue, the simultaneous injection molding of double sprue is realized, and the injection efficiency is effectively improved; meanwhile, an even number of mold cavities are arranged on the injection mold to form one mold with multiple cavities, so that simultaneous injection molding of multiple workpieces is realized, and the injection molding efficiency is further effectively improved; the cross section of the pouring gate is semicircular, so that the pouring gate is easier to manufacture, and the manufacturing cost of the mold can be effectively controlled.

Description

Injection mold with symmetrical double-sprue structure

Technical Field

The application relates to the technical field of molds, in particular to an injection mold with a symmetrical double-sprue structure.

Background

With the increasing popularization of electronic terminal products, the market demand and supply of data lines as accessory products of the electronic terminal products are getting larger and larger.

The data line is generally composed of a terminal, a wire and an outer layer of plastic, and during production, the wire and the terminal are welded firstly, and then the outer layer of plastic is injected and molded outside the terminal and the wire.

The injection molding is usually completed on an injection molding machine, an injection mold is installed on the injection molding machine, a mold cavity is preset on the injection mold, and a melt in a trough of the injection molding machine enters the mold cavity through a nozzle and a pouring system of the injection mold and is finally cured and molded in the mold cavity.

The existing injection mold mainly has a direct gate, a side gate, a point gate, a submarine gate and other types of gates, and the gates have relatively single structures and lower injection molding efficiency.

Disclosure of Invention

The present application aims to solve at least one of the above technical problems to a certain extent.

The application provides an injection mold with two runner structures of symmetry includes:

mounting a template;

the lower template is in matched butt joint with the upper template, and a die cavity is formed by matching the joint surface of the upper template and the lower template; and

the pouring system is communicated with the mold cavity;

the gating system includes:

a shunt channel; and

the sprue is communicated with the branch runner;

the pouring gate is in a symmetrical C shape, the pouring gate is provided with two tail ends communicated with the same mold cavity, and the two tail ends are arranged oppositely; the cross section of the pouring gate is gradually reduced from the middle part to the two ends, and the two tail ends of the pouring gate are in a sharp mouth shape.

Furthermore, the injection mold is provided with an even number of mold cavities which are horizontally arranged at intervals in the left-right direction; every two adjacent mold cavities form a cavity group, a runner is arranged in the middle of each cavity group, two gates are symmetrically arranged on the left side and the right side of the runner, and the two gates are respectively communicated with one mold cavity.

Further, the runner extends in the front-rear direction, and the middle of the gate is connected with the side wall of the runner.

Further, the cross section of the gate is arranged to be semicircular.

Furthermore, the upper template is provided with an upper insert, and the parting surface of the upper template is provided with an upper insert groove which is matched with the upper insert and used for placing the upper insert; the lower template is provided with a lower insert, and the parting surface of the lower template is provided with a lower insert groove matched with the lower insert for placing the lower insert.

Furthermore, an inner concave upper die cavity is formed on the parting surface of the upper die plate, a lower die cavity is formed on the parting surface of the lower die plate, and the upper die cavity and the lower die cavity are matched and butted to form the die cavity.

Furthermore, the upper insert groove is formed in the bottom of the upper die cavity and communicated with the upper die cavity, an upper gate groove is formed in the side wall of the upper insert groove, located on one side of the upper die cavity, and the tip of the upper gate groove is communicated with the upper die cavity; the side wall of the upper mold insert, which faces one side of the upper mold cavity, is a plane vertical to the parting surface of the upper mold plate;

the lower insert groove is formed in the bottom of the lower mold cavity and communicated with the lower mold cavity, a lower sprue groove is formed in the side wall of the lower insert groove, located on one side of the lower mold cavity, and the tip of the lower sprue groove is communicated with the lower mold cavity; and the side wall of the lower insert, which faces one side of the lower mold cavity, is a plane vertical to the parting surface of the lower template.

Furthermore, the upper insert groove is formed in the bottom of the upper mold cavity and communicated with the upper mold cavity, and an upper gate groove is formed in the side wall of the upper insert, facing the upper mold cavity; the side wall of the upper insert groove, which is positioned at one side of the upper die cavity, is a plane vertical to the parting surface of the upper die plate;

the lower insert groove is formed in the bottom of the lower mold cavity and communicated with the lower mold cavity, and a lower sprue groove is formed in the side wall of the lower insert, which faces the lower mold cavity; the side wall of the lower insert groove, which is positioned at one side of the lower mold cavity, is a plane vertical to the parting surface of the lower mold plate.

Further, the number of the mold cavities is an even number which is greater than or equal to four; the pouring system is provided with an inclined main runner corresponding to every two adjacent mold cavities.

Furthermore, the starting ends of the main runner infinitely converge but do not overlap, and the tail ends of the main runner are respectively positioned in a middle division area between the two mold cavities communicated with the main runner.

The beneficial effect of this application is: the sprue is arranged in a symmetrical C shape, so that two tail ends which are oppositely arranged and communicated with the same mold cavity are formed on the sprue, the simultaneous injection molding of double sprue is realized, and the injection molding efficiency is effectively improved; meanwhile, an even number of mold cavities are arranged on the injection mold to form one mold with multiple cavities, so that simultaneous injection molding of multiple workpieces is realized, and the injection molding efficiency is further effectively improved; the cross section of the pouring gate is semicircular, so that the pouring gate is easier to manufacture, and the manufacturing cost of the mold can be effectively controlled.

Drawings

Fig. 1 is a schematic perspective view of an injection mold with a symmetrical dual gate structure according to the present application.

FIG. 2 is an exploded view of the present application with a symmetrical dual gate structure.

Fig. 3 is an exploded view of a first perspective of the upper die assembly of the present application.

Fig. 4 is a perspective view of an upper mold assembly according to the present application from a second perspective.

Fig. 5 is an exploded view of the upper die assembly of the present application from a second perspective.

Fig. 6 is an enlarged view of a portion a in fig. 5.

Fig. 7 is a schematic perspective view of a combined state of the wire clamping jig and the lower die assembly according to the present application.

Fig. 8 is a reference view from a front view when the gate of the present application is applied to a data line mesh tail mold.

Fig. 9 is a reference view from a top view of a gate of the present application as applied to a data line web mold.

Fig. 10 is a perspective reference view of a gate of the present application as applied to a data line web tail mold.

Fig. 11 is a perspective reference view of the gate of the present application when applied to a data line inner mold.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature therebetween; also, the first feature "on," "above" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature; the first feature being "under," "below," and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature.

The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments.

Referring to fig. 1 to 11, the present application provides an injection mold with a symmetrical dual gate structure, which includes an upper mold assembly 10 and a lower mold assembly 20.

Go up mould assembly 10 and include mould base 11 and cope match-plate pattern 12, cope match-plate pattern 12 is fixed to be set up in the bottom of mould base 11. The upper die base 11 and the upper die plate 12 are connected through bolts. As shown in fig. 3 and 5, the bottom of the upper die base 11 is provided with a plurality of upper die positioning posts 111, and the top of the upper die plate 12 is provided with upper die positioning holes 121 at positions corresponding to the upper die positioning posts 111. During assembly, the upper die positioning holes 121 on the upper die plate 12 are aligned with the upper die positioning posts 111 on the upper die base 11, so that the upper die base 11 and the upper die plate 12 can be accurately butted.

The lower die assembly 20 includes a lower die base 21 and a lower die plate 22. The lower mold base 21 comprises a lower mold base plate 211 and a lower mold leg 212 fixedly arranged on the lower mold base plate 211, and the lower mold plate 22 is fixedly arranged above the lower mold leg 212.

The upper template 12 and the lower template 22 are in matching butt joint and have abutting parting surfaces. The upper mold plate 12 is provided with upper positioning posts 122, the lower mold plate 22 is provided with lower positioning holes 222 at positions corresponding to the upper positioning posts 122, and the upper mold plate 12 and the lower mold plate 22 are in matched butt joint by utilizing the upper positioning posts 122 and the lower positioning holes 222.

The upper die plate 12 and the lower die plate 22 are matched with each other to form a die cavity, and the upper die assembly 10 and the lower die assembly 20 are matched with each other to form a pouring system communicated with the die cavity.

The gating system includes a feeding hole 31, a main runner 32, a sub-runner 33, and a gate 34.

The feed port 31 is opened in the middle of the upper die base 11. The feeding end of the feeding hole 31 is connected with a feeding device of the injection molding machine, and the discharging end of the feeding hole 31 is communicated with the main flow passage 32. The main runner 32 is communicated with the mold cavity through a runner 33 and a gate 34.

Referring to fig. 8 to 11, the gate 34 is disposed in a symmetrical C shape, the gate 34 has two ends communicated with the same mold cavity, the two ends are disposed opposite to each other, the cross section of the gate 34 is gradually reduced from the middle to the two ends, and the end of the gate is in a sharp mouth shape. The sprue 34 is arranged in a symmetrical C shape, so that the sprue 34 forms a symmetrical double-sprue structure, multi-sprue simultaneous feeding is realized, and the injection molding efficiency is effectively improved. In this embodiment, the cross section of the gate 34 is preferably configured to be semicircular.

The injection mold is provided with an even number of mold cavities which are horizontally arranged at intervals in the left-right direction; every two adjacent mold cavities form a cavity group, a runner 33 is arranged in the middle of each cavity group, two gates 34 are symmetrically arranged on the left side and the right side of the runner 33, and the two gates 34 are respectively communicated with one mold cavity.

As one of preferred embodiments, the runner 33 extends in the front-rear direction, and the center portion of the gate 34 directly engages to the side wall of the runner 33 to communicate with the runner 33. Of course, in other embodiments, the diversion channel 33 may be arranged to extend in a left-right direction or other suitable directions.

As shown in fig. 4-7, the gate 34 can be directly disposed on the upper mold plate 12 and the lower mold plate 22.

Specifically, the upper template 12 is provided with an upper insert 41, and the parting surface of the upper template 12 is provided with an upper insert groove 401 which is matched with the upper insert 41 and used for placing the upper insert 41; the lower template 22 is provided with a lower insert 42, and the parting surface of the lower template 22 is provided with a lower insert groove 402 which is matched with the lower insert 42 and used for placing the lower insert 42.

The upper template 12 is provided with an inner concave upper mold cavity 123 on the parting surface, the lower template 22 is provided with an inner concave lower mold cavity 223 on the parting surface, and the upper mold cavity 123 and the lower mold cavity 223 are matched and butted to form the mold cavity. In this embodiment, the lower mold cavity 223 and the upper mold cavity 123 have the same structure, and the parting surfaces of the upper mold plate 12 and the lower mold plate 22 are symmetrical to form a vertically symmetrical structure.

The upper insert groove 401 is opened at the bottom of the upper mold cavity 123 and is communicated with the upper mold cavity 123, an upper gate groove 341 is formed on a side wall of the upper insert groove 401 located at one side of the upper mold cavity 123, and a tip of the upper gate groove 341 is communicated with the upper mold cavity 123. The side wall of the upper insert 41 facing the upper mold cavity 123 is a plane perpendicular to the parting plane of the upper mold plate 12. In this embodiment, the cross section of the upper gate groove 341 is semicircular. After the upper insert 41 is fitted into the upper insert groove 401, an upper gate is formed between a side wall of the upper insert 41 facing the upper mold cavity 123 and the upper gate groove 341.

The lower insert groove 402 is formed at the bottom of the lower mold cavity 223 and is communicated with the lower mold cavity 223, a lower sprue groove is formed on the side wall of the lower insert groove 402 located at one side of the lower mold cavity 223, and the tip of the lower sprue groove is communicated with the lower mold cavity 223. The side wall of the lower insert 42 facing the lower mold cavity 223 is a plane perpendicular to the parting plane of the lower template 22. In this embodiment, the cross section of the lower gate groove is semicircular. After the lower insert 42 is assembled in the lower insert groove 402, a lower gate is formed between a side wall of the lower insert 42 facing the lower mold cavity 223 and the lower gate groove.

When the upper template 12 is matched and butted with the lower template 22, the upper sprue and the lower sprue are spliced to form a C-shaped sprue.

In a second embodiment, the gate 34 may also be provided on the insert. Specifically, the upper insert groove 401 is opened at the bottom of the upper mold cavity 123 and communicates with the upper mold cavity 123, and an upper gate groove 341 is formed in a side wall of the upper insert 41 facing the upper mold cavity 123. The sidewall of the upper insert groove 401 on the side of the upper mold cavity 123 is a plane perpendicular to the parting plane of the upper mold plate 12. After the upper insert 41 is assembled in the upper insert groove 401, an upper gate is formed between a sidewall of the upper insert groove 401 on the side of the upper mold cavity 123 and the upper gate groove 341.

The lower insert groove 402 is opened at the bottom of the lower mold cavity 223 and communicates with the lower mold cavity 223, and a lower gate groove is formed on a side wall of the lower insert 42 facing the lower mold cavity 223. The side wall of the lower insert pocket 402 on the side of the lower mold cavity 223 is in a plane perpendicular to the parting plane of the lower die plate 22. After the lower insert 42 is assembled in the lower insert groove 402, a lower gate is formed between a side wall of the lower insert groove 402 on the side of the lower mold cavity 223 and the lower gate groove.

Referring to fig. 11, the injection mold of the present application may be applied to inner mold injection of a data line. In the injection mold of the data line inner mold, two tips of the gate 34 are respectively located at the top points of the upper and lower end surfaces of the mold cavity of the data line inner mold near the bottom. Fig. 11 shows the positional relationship among the data line, the mold cavity of the inner mold, and the gate 34 during the inner mold injection. When the injection mold is applied to the inner mold injection molding of the data line, the pouring system can also be provided with a pouring gate 34 at other glue inlet points of the inner mold, and the pouring gate 34 can be provided with a point pouring gate structure shown in fig. 11, or any one of the existing suitable pouring gate structures can be adopted.

Referring to fig. 8 to 10, the injection mold of the present application may also be applied to injection molding of a net tail mold 200 for a data line, where the net tail mold 200 includes a net tail segment wrapped outside the wire and a terminal segment wrapped at a connection position of the terminal and the wire. In the injection mold of the data line mesh tail mold 200, two tips of the gate 34 are located at the junction of the mesh tail section and the terminal section. Fig. 8 to 10 show the position relationship among the data line, the mold cavity of the net tail mold 200 and the gate 34 during the injection molding process of the net tail mold 200, wherein the portion shown by the dotted line is the outer contour structure of the net tail mold 200 of the data line, that is, the inner contour structure of the mold cavity forming the net tail mold 200. When the injection mold is applied to injection molding of the net tail mold 200 of the data line, a mold cavity of a net tail section of the net tail mold 200 is opened on the insert.

The number of the die cavities is even number which is more than or equal to four, and the pouring system is provided with a main runner 32 which is inclined corresponding to every two adjacent die cavities. In specific implementation, the injection mold is preferably provided with six mold cavities with the same structure. The six mold cavities are arranged in the left-right direction at equal intervals horizontally. The gating system is provided with three inclined main runners 32 corresponding to the six mold cavities, wherein each main runner 32 is communicated with two adjacent mold cavities, and then the six mold cavities are divided into three groups.

As shown in fig. 3, the starting ends of the three main runners 32 are infinitely gathered but do not overlap, and the tail ends of the three main runners 32 are respectively located in the middle dividing region between the two mold cavities communicated with the three main runners. It is understood that one end of the main channel 32, which is connected with the feeding hole 31 for the melt to enter into the main channel 32, is the beginning of the main channel 32; the end of the main runner 32 connected to the sub-runners 33 for the melt to enter the sub-runners 33 from the main runner 32 is the end of the main runner 32.

In this embodiment, the main flow passage 32 is provided with an inclined conical structure, the cross section of the main flow passage 32 is circular, and the cross sectional area of the main flow passage 32 gradually increases from the beginning to the end. The starting ends of the three main flow channels 32 are arranged at equal intervals, so that a connecting line between the centers of circles of the starting ends of the three main flow channels 32 forms an equilateral triangle on a plane where the connecting line is located. Meanwhile, the ends of the three main flow channels 32 are all inclined outward in different directions, so that the three main flow channels 32 form a specific inclined shape. Specifically, the ends of the two main flow channels 32 located on the outer side are inclined outward in the left-right direction, so that the two main flow channels 32 located on the outer side are inclined in the left-right direction, and the two main flow channels 32 located on the outer side are symmetrically arranged in the left-right direction; the end of the main flow channel 32 in the middle is inclined outward in the front-rear direction, so that the main flow channel 32 in the middle is inclined in the front-rear direction, and the connection line between the centers of the three ends of the main flow channel 32 forms an isosceles triangle with the plane.

Referring to fig. 7, the injection mold further includes a wire clamping fixture 50 disposed between the upper mold plate 12 and the lower mold plate 22.

The wire clamping fixture 50 includes a fixture base 51, and a terminal clamping module strip 52 detachably disposed on the fixture base 51. The terminal holding die strip 52 is provided with terminal accommodating grooves 53 corresponding to the positions and the number of the die cavities one to one, and the terminal accommodating grooves 53 are used for accommodating and holding the terminals 101.

Specifically, the terminal holding die strip 52 includes a die strip base plate 521 and a die strip cover plate 522. Six terminal accommodating grooves 53 for accommodating the terminals 101 are distributed in parallel on the mold bar base plate 521. The terminal receiving groove 53 is formed in an open structure, so that the terminal 101 can be quickly and accurately placed in the terminal receiving groove 53. And a terminal avoiding opening matched with the outer contour of the terminal 101 is formed in one side of the mold cavity facing the terminal accommodating groove 53.

Six wire clamping grooves 54 for clamping wires are formed in one end, far away from the terminal accommodating groove 53, of the wire clamping jig 50, and the positions of the wire clamping grooves 54, the terminal accommodating groove 53 and the mold cavity correspond to one another one to one. The side wall of the wire clamping groove 54 is provided with an elastic clamping mechanism 55, and the elastic clamping mechanism 55 is used for providing an elastic force perpendicular to the extending direction of the wire 102 for the wire 102 placed in the wire clamping groove 54, so that the wire 102 is tightly abutted to the wire clamping groove 54, and the wire 102 is prevented from loosening in the machining process.

In order to allow the wire 102 to pass through and play a certain bearing role on the wire 102, a wire avoiding groove for accommodating the wire 102 is further arranged on the parting surface of the upper template 12 and the lower template 22 in a matching manner.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is a more detailed description of the present application in connection with specific embodiments thereof, and it is not intended that the present application be limited to the specific embodiments thereof. It will be apparent to those skilled in the art from this disclosure that many more simple derivations or substitutions can be made without departing from the spirit of the disclosure.

Claims

1. An injection mold with a symmetrical double-gate structure, comprising:

mounting a template;

the pouring system is communicated with the mold cavity;

the gating system includes:

a shunt channel; and

the sprue is communicated with the branch runner;

the pouring gate is in a symmetrical C shape, the pouring gate is provided with two tail ends communicated with the same mold cavity, and the two tail ends are arranged oppositely; the cross section of the pouring gate is gradually reduced from the middle part to the two ends.

2. The injection mold having a symmetrical dual gate structure as claimed in claim 1, wherein the injection mold is provided with an even number of mold cavities, the even number of mold cavities being horizontally spaced in the left-right direction; every two adjacent mold cavities form a cavity group, a runner is arranged in the middle of each cavity group, two gates are symmetrically arranged on the left side and the right side of the runner, and the two gates are respectively communicated with one mold cavity.

3. An injection mold having a symmetrical dual gate structure as claimed in claim 1, wherein said runner extends in a front-to-rear direction, and a central portion of said gate is connected to a side wall of said runner.

4. An injection mold having a symmetrical double gate structure as claimed in any one of claims 1 to 3, wherein the cross section of the gate is configured to be semicircular.

5. The injection mold with a symmetrical dual gate structure as claimed in claim 4, wherein the upper mold plate is provided with an upper insert, and a parting surface of the upper mold plate is provided with an upper insert groove which is matched with the upper insert for the upper insert to be inserted; the lower template is provided with a lower insert, and the parting surface of the lower template is provided with a lower insert groove matched with the lower insert for placing the lower insert.

6. The injection mold with the symmetrical double-sprue structure as claimed in claim 5, wherein the upper mold plate is provided with an inner concave upper mold cavity on a parting surface, the lower mold plate is provided with a lower mold cavity on the parting surface, and the upper mold cavity and the lower mold cavity are matched and butted to form the mold cavity.

7. The injection mold with a symmetrical dual gate structure as claimed in claim 6, wherein the upper insert groove is opened at the bottom of the upper mold cavity and communicates with the upper mold cavity, an upper gate groove is formed on a side wall of the upper insert groove at one side of the upper mold cavity, and a tip of the upper gate groove communicates with the upper mold cavity; the side wall of the upper mold insert, which faces one side of the upper mold cavity, is a plane vertical to the parting surface of the upper mold plate;

8. The injection mold with a symmetrical dual gate structure as claimed in claim 6, wherein the upper insert groove is opened at the bottom of the upper mold cavity and communicates with the upper mold cavity, and an upper gate groove is formed on a side wall of the upper insert facing the upper mold cavity; the side wall of the upper insert groove, which is positioned at one side of the upper die cavity, is a plane vertical to the parting surface of the upper die plate;

9. An injection mold having a symmetrical dual gate structure as claimed in claim 2, wherein the number of said mold cavities is an even number greater than or equal to four; the pouring system is provided with an inclined main runner corresponding to every two adjacent mold cavities.

10. An injection mold having a symmetrical dual gate structure as claimed in claim 9, wherein the start ends of the main runners converge endlessly but do not coincide, and the end ends of the main runners are respectively located in the middle division area between the two mold cavities communicating therewith.