CN117067517A - Cable sheath injection mold and method - Google Patents

Abstract

The invention discloses a cable sheath injection mold and a method, which belong to the technical field of wire manufacture, wherein the cable sheath injection mold comprises an upper mold assembly, a first lower mold assembly and a second lower mold assembly, wherein the upper mold assembly is provided with a first injection molding groove and a first injection molding hole communicated with the first injection molding groove; the first lower die assembly is provided with a product positioning groove and a supporting block arranged in the product positioning groove, and the supporting block is used for supporting a first side surface of a wire rod of a product to be wrapped; the second lower die assembly is provided with a second injection molding groove and a second injection molding hole communicated with the second injection molding groove; the upper die assembly is selectively connected with the first lower die assembly and the second lower die assembly, the upper die assembly is connected with the first lower die assembly to form the outer skin on the second side surface of the wire rod, and the upper die assembly is connected with the second lower die assembly to form the outer skin on the first side surface of the wire rod. The cable sheath injection mold and the method provided by the invention can prevent wires from being exploded, so that the formed sheath can completely wrap the wires, and the rejection rate is reduced.

Description

Cable sheath injection mold and method

Technical Field

The invention relates to the technical field of wire manufacturing, in particular to a cable sheath injection mold and a method.

Background

The charging line is one of the data lines, and is an essential structure for charging the electronic device. In the process of manufacturing the charging wire, after the charging wire is initially molded, in order to improve the protection of the charging wire, the periphery of the charging wire needs to be subjected to injection molding encapsulation, and a layer of soft adhesive layer, also called as a sheath, is formed on the periphery of the charging wire.

At present, for the injection molding process of the charging wire, because a plurality of wires exist in the charging wire to be injection molded, the length of the wires is usually about 100 mm, and the texture of the wires is very soft. In the prior art, an injection mold is adopted to form the outer skin, the injection mold is provided with an upper mold cavity and a lower mold cavity, the upper mold cavity and the lower mold cavity are buckled to form an injection molding space for accommodating wires, and sizing materials are injected into the injection molding space to form the outer skin after shaping.

However, because the wire rod part is longer, directly adopts whole simultaneously flowing water injecting glue, because the sizing material flows in the space of moulding plastics, and the sizing material has certain pressure, can lead to the sizing material to dash askew with the wire rod, and then appear the wire rod and pop out, and then lead to the sheath of moulding plastics unable complete even parcel wire rod, have higher rejection rate.

Disclosure of Invention

The invention aims to provide a cable sheath injection mold and a cable sheath injection method, which can prevent wires from being exploded, so that the formed sheath can completely wrap the wires, and the rejection rate is reduced.

The technical scheme adopted by the invention is as follows:

cable sheath injection mold, comprising:

the upper die assembly is provided with a first injection molding groove and a first injection molding hole communicated with the first injection molding groove;

the first lower die assembly is provided with a product positioning groove and a supporting block arranged in the product positioning groove, and the supporting block is used for supporting a first side surface of a wire rod of a product to be wrapped;

the second lower die assembly is provided with a second injection molding groove and a second injection molding hole communicated with the second injection molding groove;

the upper die assembly is selectively connected with the first lower die assembly and the second lower die assembly, the upper die assembly is connected with the first lower die assembly to form a sheath on the second side of the wire rod, and the upper die assembly is connected with the second lower die assembly to form a sheath on the first side of the wire rod.

Optionally, the length of the support block is configured to be substantially equal to the length of the wire, and the width of the support block is configured to be substantially equal to the width of the wire.

Optionally, the die further comprises a positioning die strip, the upper die assembly is provided with a first positioning groove, the first lower die assembly is provided with a second positioning groove, the second lower die assembly is provided with a third positioning groove, and the positioning die strip is inserted into a first positioning hole formed by matching the first positioning groove with the second positioning groove or a second positioning hole formed by matching the first positioning groove with the third positioning groove.

Optionally, the positioning mold strip is provided with a fourth positioning groove, and the fourth positioning groove is configured to be inserted by one end of the product to be wrapped so as to assist in positioning the product to be wrapped.

Optionally, the cross section of the positioning die strip is polygonal.

Optionally, the first positioning groove penetrates through the upper die assembly, the second positioning groove penetrates through the first lower die assembly, the third positioning groove penetrates through the second lower die assembly, and the length of the positioning die strip is greater than that of the first positioning groove, the second positioning groove and the third positioning groove.

Optionally, two first injection holes are formed, and the two first injection holes are arranged at intervals along the width direction of the first injection groove;

and/or two second injection holes are arranged, and the two second injection holes are arranged at intervals along the width direction of the second injection groove.

Optionally, the upper die assembly further has a positioning structure for positioning the product to be prepuced.

Optionally, the device further comprises a plurality of first connecting columns, one ends of the first connecting columns are connected to the upper die assembly, the other ends of the first connecting columns protrude out of the upper die assembly, the first lower die assembly and the second lower die assembly are respectively provided with a plurality of connecting holes corresponding to the first connecting columns one by one, and the other ends of the first connecting columns are used for being inserted into the connecting holes of the first lower die assembly or the second lower die assembly.

The cable sheath injection molding method is applied to the cable sheath injection mold and comprises the following steps of:

placing a product to be wrapped in a product positioning groove or a first injection molding groove;

connecting the upper die assembly with the first lower die assembly, and enabling the supporting block to support the first side surface of the wire rod of the product to be wrapped;

injecting glue stock into the first injection molding groove through the first injection molding hole so as to form a sheath on the second side surface of the wire rod;

separating the upper die assembly from the first lower die assembly and connecting the upper die assembly with the second lower die assembly;

glue is injected through a second injection molding Kong Xiangdi two injection molding groove to form a skin on the first side of the wire.

The cable sheath injection mold and the method provided by the invention have at least the following beneficial effects:

the upper die assembly is used for forming the outer skin of the second side surface of the wire rod, the second lower die assembly is used for forming the outer skin of the first side surface of the wire rod, the first lower die assembly can support the first side surface of the wire rod when forming the outer skin of the second side surface of the wire rod, the supporting block of the first lower die assembly can act as a thimble to prevent the wire rod from being askew when injecting sizing materials into the first injection molding groove through the first injection molding hole of the upper die assembly, and the wire rod can be supported and bound through the formed partial outer skin when injecting sizing materials into the second injection molding Kong Xiangdi, so that the wire rod can not be askew, the formed outer skin can be smoothly wrapped by the wire rod, the situation that the wire rod bursts out of the outer skin is prevented, and the rejection rate is reduced.

Drawings

Fig. 1 is a schematic structural diagram of an injection mold for a cable sheath according to an embodiment of the present invention;

fig. 2 is a sectional view of an injection mold for a cable sheath according to an embodiment of the present invention in an operating state;

FIG. 3 is an enlarged schematic view of the invention at A shown in FIG. 2;

fig. 4 is a sectional view of the cable sheath injection mold according to the embodiment of the present invention in another working state;

FIG. 5 is an enlarged schematic view of the invention at B shown in FIG. 4;

FIG. 6 is a schematic diagram of an upper mold assembly according to an embodiment of the present invention;

FIG. 7 is a second schematic structural view of an upper mold assembly according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a first lower die assembly according to an embodiment of the present invention;

FIG. 9 is a second schematic structural view of a first lower die assembly according to an embodiment of the present invention;

FIG. 10 is a schematic view of a second lower die assembly according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a part of an injection mold for cable sheath according to an embodiment of the invention;

fig. 12 is a schematic diagram II of a part of a cable sheath injection mold according to an embodiment of the present invention;

FIG. 13 is a schematic view of the product to be prepuced before and after forming the outer skin according to an embodiment of the present invention;

fig. 14 is a flowchart of a cable sheath injection molding method according to an embodiment of the present invention.

In the figure:

2. an upper die assembly; 21. a first injection molding groove; 22. a first injection molding hole; 23. a first positioning groove; 24. a positioning structure; 201. a die carrier is arranged; 202. an upper mold core; 3. a first lower die assembly; 31. a product positioning groove; 32. a support block; 33. a second positioning groove; 34. a connection hole; 301. a first lower mold frame; 302. a first lower mold core; 4. a second lower die assembly; 41. a second injection molding groove; 42. a second injection molding hole; 43. a third positioning groove; 401. a second lower die frame; 402. a second lower mold core; 5. positioning the mold strip; 51. a fourth positioning groove; 6. a first connection post; 7. a second connection post; 100. a product to be wrapped; 101. a wire rod; 102. a skin; 103. and a plug-in section.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the invention more clear, the technical scheme of the invention is further described below by a specific embodiment in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present invention are shown.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in 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 simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Example 1

The embodiment provides a cable sheath injection mold for coating a sheath 102 outside a product to be coated 100, which can prevent wires 101 from bursting out, so that the formed sheath 102 can completely wrap the wires 101, and the rejection rate is reduced.

It should be noted that the product to be wrapped 100 may be a data line, a charging line, an earphone line, etc., which is not limited in this embodiment. The embodiment will be described taking the product to be wrapped 100 as a charging wire as an example. As shown in fig. 13, the product to be wrapped 100 includes a wire 101 and connectors connected to two ends of the wire 101, wherein one of the connectors has a plug section 103. It is necessary to wrap the wire 101 and part of the connector with a sheath 102 for protecting the wire 101.

As shown in fig. 1 to 5, the cable sheath injection mold includes an upper mold assembly 2, a first lower mold assembly 3, and a second lower mold assembly 4.

As shown in fig. 6, the upper mold assembly 2 has a first injection groove 21 and a first injection hole 22 communicating with the first injection groove 21, and a glue material can be injected into the first injection groove 21 through the first injection hole 22, and the glue material is used for forming the outer skin 102. In this embodiment, the first injection molding groove 21 is also used for accommodating the charging wire, and the first injection molding groove 21 can position the charging wire except for the portion forming the outer skin 102 to prevent the charging wire from moving when the glue stock is injected.

As shown in fig. 8 and 9, the first lower die assembly 3 in this embodiment has a product positioning groove 31 and a supporting block 32 disposed in the product positioning groove 31, where the product positioning groove 31 is used for positioning a product to be wrapped 100, and the supporting block 32 is used for supporting a first side surface of the wire 101 of the charging wire, specifically supporting a first side surface of the wire 101 in the thickness direction, so as to act as a thimble in the injection molding process, and ensure the injection molding effect.

As shown in fig. 10, the second lower die assembly 4 has a second injection groove 41 and a second injection hole 42 communicating with the second injection groove 41, and the second injection groove 41 can be injected with the rubber material through the second injection hole 42. The second injection groove 41 is used to receive the charging wire, and the second injection groove 41 may position the charging wire except for the portion forming the outer skin 102 to prevent the charging wire from moving when the glue is injected.

The upper die assembly 2 selectively connects the first lower die assembly 3 and the second lower die assembly 4, that is, the first lower die assembly 3 is connected with the upper die assembly 2, or the second lower die assembly 4 is connected with the upper die assembly 2.

The first lower die assembly 3 is connected with the upper die assembly 2 to form the outer skin 102 on the second side of the wire 101, and at this time, the upper die assembly 2 and the first lower die assembly 3 are buckled together to form a sealed injection molding space. Wherein fig. 2 and 3 are schematic views of the second side after the skin 102 is formed. The second lower die assembly 4 is connected to the upper die assembly 2 to form the outer skin 102 on the first side of the wire 101, that is, the entire outer skin 102 is formed in steps in the present embodiment. The upper die assembly 2 and the second lower die assembly 4 are buckled together to form a sealed injection molding space. Fig. 4 and 5 are schematic views of the outer skin 102 formed on the first side (i.e., the entire outer skin 102 is formed outside the wire 101). The sheath 102 formed on the first side and the sheath 102 formed on the second side can be connected to each other so that the sheath 102 formed can wrap the entire wire 101.

In the cable sheath injection mold provided in this embodiment, the upper mold assembly 2 is used for forming the sheath 102 on the second side of the wire 101, the second lower mold assembly 4 is used for forming the sheath 102 on the first side of the wire 101, the first lower mold assembly 3 can support the first side of the wire 101 when forming the sheath 102 on the second side of the wire 101, so that the support block 32 of the first lower mold assembly 3 can act as a thimble to prevent the wire 101 from being askew when injecting glue into the first injection groove 21 through the first injection hole 22 of the upper mold assembly 2, and the wire 101 can be supported and bound through the formed part of the sheath 102 when injecting glue into the second injection groove 41 through the second injection hole 42, so that the wire 101 can not be askew, and the formed sheath 102 can smoothly wrap the wire 101, thereby preventing the wire 101 from being popped out of the sheath 102 and reducing the rejection rate.

Alternatively, as shown in fig. 2 and 3, the length of the supporting block 32 in the embodiment is approximately equal to the length of the wire 101, and the width of the supporting block 32 is approximately equal to the width of the wire 101, so that the supporting block 32 is fully attached to the surface of the first side surface of the wire 101 as much as possible, on one hand, the supporting block has a relatively high supporting effect, and the wire 101 is prevented from moving; on the other hand, when the second-side skin 102 is injection-molded in the upper die assembly 2, a part of the glue material can be prevented from flowing to the first side, and the influence on the subsequent injection molding on the first side and the influence on the appearance of the whole formed skin 102 can be avoided.

In some alternative embodiments, as shown in fig. 11 and 12, the cable sheath injection mold further includes a positioning molding 5. As shown in fig. 6 to 10, the upper die assembly 2 has a first positioning groove 23, the first lower die assembly 3 has a second positioning groove 33, and the second lower die assembly 4 has a third positioning groove 43. When the first lower die assembly 3 is connected with the upper die assembly 2, that is, when the upper die assembly 2 is buckled with the first lower die assembly 3, the positioning die strip 5 is inserted into the first positioning hole formed by the cooperation of the first positioning groove 23 and the second positioning groove 33, and the positioning die strip 5 can position the upper die assembly 2 and the first lower die assembly 3 when buckled, so that the upper die assembly 2 and the first lower die assembly 3 are installed in alignment.

When the second lower die assembly 4 is connected with the upper die assembly 2, that is, when the upper die assembly 2 is buckled with the first lower die assembly 3, the positioning die strip 5 is inserted into a second positioning hole formed by matching the first positioning groove 23 and the third positioning groove 43, and the positioning die strip 5 can position the upper die assembly 2 and the second lower die assembly 4 when buckled so as to enable the two to be installed in alignment.

In this embodiment, the first positioning groove 23 penetrates the upper die assembly 2, the second positioning groove 33 penetrates the first lower die assembly 3, the third positioning groove 43 penetrates the second lower die assembly 4, and both ends of the positioning die strip 5 protrude from the upper die assembly 2, that is, the length of the positioning die strip 5 is greater than that of the first positioning groove 23, the second positioning groove 33 and the third positioning groove 43, so that the positioning die strip 5 has a portion exposed from the upper die assembly 2, and the positioning die strip 5 can assist in die opening, for example, the upper die assembly 2, the first lower die assembly 3 or the second lower die assembly 4 can be tilted by the positioning die strip 5, so that the separation of the upper die assembly 2 and the first lower die assembly 3 or the second lower die assembly 4 is realized, and the die opening difficulty is reduced.

Optionally, as shown in fig. 12, the positioning molding 5 has a fourth positioning groove 51, and the fourth positioning groove 51 is configured to be inserted into one end of the product to be wrapped 100, that is, to be inserted into the insertion section 103 of the charging wire. On the one hand, the plugging section 103 is inserted into the fourth positioning groove 51, so that the first injection molding groove 21, the second injection molding groove 41 and the product positioning groove 31 can be assisted to position the charging wire, and the moving probability of the charging wire is further reduced; on the other hand, after injection molding is completed, the plugging section 103 is inserted into the fourth positioning groove 51, so that the charging wire can be driven to be demolded by lifting the positioning die strip 5, and smooth demolding of the charging wire is facilitated.

In some alternative embodiments, the cross section of the positioning die strip 5 is polygonal, so that an operator can align the positioning die strip 5 and the first positioning groove 23, the second positioning groove 33 or the third positioning groove 43 first and then insert the positioning die strip into the first positioning groove 23, the second positioning groove 33 or the third positioning groove 43 when installing, the position of the fourth positioning groove 51 is not required to be considered, and the assembly difficulty of the cable sheath injection mold is reduced.

Optionally, as shown in fig. 6, two first injection holes 22 are provided, and the two first injection holes 22 are disposed at intervals along the width direction of the first injection groove 21, so that glue can be injected into the first injection groove 21 from two sides of the first injection groove 21, uniformity of the glue in the first injection groove 21 is improved, uniformity of thickness of the formed outer skin 102 can be ensured, and injection efficiency can be improved.

Similarly, as shown in fig. 10, two second injection holes 42 are provided, and the two second injection holes 42 are disposed at intervals along the width direction of the second injection groove 41, so that the glue material can be injected into the second injection groove 41 from two sides of the second injection groove 41, the uniformity of the glue material in the second injection groove 41 is improved, the uniformity of the thickness of the formed outer skin 102 can be ensured, and the injection efficiency can be improved.

For example, referring to fig. 6, the upper module 2 further has a positioning structure 24, and the positioning structure 24 is used for positioning the charging wire so that the charging wire is installed in the first injection molding groove 21, and also can ensure uniformity of positions of the charging wire in the first injection molding groove 21. The positioning structure 24 can be set according to the structural characteristics of the product to be wrapped 100, in this embodiment, the charging head at one end of the charging wire has a hole, and the corresponding positioning structure 24 is a positioning column, and the positioning column can be inserted into the hole to realize positioning. When the product 100 to be wrapped has a projection, the positioning structure 24 may also be a correspondingly configured groove.

Optionally, as shown in fig. 11, the cable sheath injection mold further includes a plurality of first connection posts 6. Wherein, one end of a plurality of first connecting posts 6 is connected to the upper module 2, and the other end protrudes out of the upper module 2. As shown in fig. 12, the first lower die assembly 3 and the second lower die assembly 4 are respectively provided with a plurality of connecting holes 34 corresponding to the first connecting columns 6 one by one, and the other end of each first connecting column 6 is used for being inserted into the connecting hole 34 of the first lower die assembly 3 or the second lower die assembly 4, so that the positioning connection between the upper die assembly 2 and the first lower die assembly 3 or the second lower die assembly 4 is realized.

In some alternative embodiments, as shown in fig. 1, the upper mold assembly 2 may include an upper mold frame 201 and an upper mold core 202, and the first injection groove 21, the first injection hole 22, and the first positioning groove 23 are all provided on the upper mold core 202, and the upper mold core 202 is mounted on the upper mold frame 201. As shown in fig. 2, the first lower mold assembly 3 may include a first lower mold frame 301 and a first lower mold core 302, and the product positioning groove 31 and the second positioning groove 33 are disposed on the first lower mold core 302, and the first lower mold core 302 is mounted on the first lower mold frame 301. As shown in fig. 4, the second lower die assembly 4 may include a second lower die frame 401 and a second lower die core 402, and the second injection groove 41, the second injection hole 42, and the third positioning groove 43 are all provided on the second lower die core 402, and the second lower die core 402 is mounted on the second lower die frame 401.

As a further alternative, as shown in fig. 1, 11 and 12, the upper mold frame 201 and the first lower mold frame 301 or the second lower mold frame 401 may be abutted by a plurality of second connection columns 7, and a specific connection manner may be referred to in the prior art.

The upper mold frame 201 has a passage communicating with the first injection hole 22 so that the glue material can be supplied to the first injection hole 22 through the passage. The second lower mold frame 401 is also provided with a passage communicating with the second injection hole 42 so that the second injection hole 42 can be supplied with the paste through the passage.

According to the cable sheath injection molding method provided by the embodiment, the sheath 102 is molded twice, half of the sheath is molded firstly, the supporting block 32 of the first lower die assembly 3 is used as the ejector pin in the molding process, and the first lower die assembly 3 needs to be replaced by the second lower die assembly 4 in the injection molding process, so that the product design that the ejector pin is not allowed due to the fact that the product is ultra-long and the appearance surface is not allowed is skillfully solved, and technical support and guarantee are provided for high-quality product industrial design.

Example two

The embodiment provides a cable sheath injection molding method, which is applied to the cable sheath injection mold in the first embodiment and can have a good injection molding effect.

As shown in fig. 14, the cable sheath injection molding method includes the steps of:

s1, placing a product 100 to be prepuced in a product positioning groove 31 or a first injection molding groove 21;

s2, connecting the upper die assembly 2 with the first lower die assembly 3, and enabling the supporting block 32 to support the first side surface of the wire 101 of the product 100 to be wrapped;

in step S2, the specific installation manner of the upper die assembly 2 and the first lower die assembly 3 may refer to the prior art, which is not limited in this embodiment.

In this embodiment, the product to be wrapped 100 may be placed in the product positioning groove 31, that is, supported by the first lower die assembly 3, and at this time, the first lower die assembly 3 supports the wire 101 portion and other portions of the product to be wrapped 100. And when the subsequent die assembly is carried out, the upper die assembly 2 is controlled to move close to the first lower die assembly 3, and the upper die assembly is reversely buckled on the first lower die assembly 3.

The product 100 to be prepuced can also be placed in the first injection groove 21, i.e. supported by the upper die assembly 2, in which case the upper die assembly 2 supports only the part of the product 100 to be prepuced that does not form the skin 102. At the time of the subsequent die assembly, the first lower die assembly 3 is controlled to move close to the upper die assembly 2 and is reversely buckled on the upper die assembly 2, and at this time, the supporting block 32 of the first lower die assembly 3 can be contacted with the first side surface of the wire 101.

In step S2, after the upper die assembly 2 is engaged with the first lower die assembly 3, the support block 32 can be in contact with the first side surface of the wire 101 so as to be able to support the wire 101. At this time, a gap exists between the wire 101 and the wall of the first injection groove 21, and the gap accommodates the glue forming the outer skin 102.

S3, injecting glue stock into the first injection groove 21 through the first injection hole 22 so as to form a sheath 102 on the second side surface of the wire 101;

in step S3, only a part of the outer skin 102 is formed, not the whole outer skin 102. The manner of injecting the glue stock can be seen in the prior art, and this is not limited in this example.

In the injection molding process, the supporting block 32 supports and abuts against the wire 101, so that the wire 101 can be prevented from being askew by the sizing material, and the formed sheath 102 can be ensured to completely wrap the wire 101.

After the glue is injected, the glue needs to be left to solidify into the skin 102 and then be opened.

S4, separating the upper die assembly 2 from the first lower die assembly 3, and connecting the upper die assembly 2 with the second lower die assembly 4;

after forming a portion of the outer skin 102, the first lower mold assembly 3 is separated from the upper mold assembly 2, that is, one-time demolding is performed, and then injection molding of another portion of the outer skin 102 is performed by connecting the second lower mold assembly 4 with the upper mold assembly 2.

It should be noted that, when the first lower die assembly 3 is separated from the upper die assembly 2, the product to be wrapped 100 remains on the upper die assembly 2, specifically, the first lower die assembly 3 can be controlled to move away from the upper die assembly 2 along the thickness direction thereof, so that the first lower die assembly 3 is smoothly separated from the upper die assembly 2 and the positioning die strip 5, and the product to be wrapped 100 cannot move because the positioning die strip 5 does not move.

After connecting the second lower die assembly 4 with the upper die assembly 2, there is a gap between the second injection groove 41 and the wire 101 for forming another portion of the outer skin 102.

And S5, injecting glue stock into the second injection groove 41 through the second injection hole 42 so as to form the outer skin 102 on the first side of the wire 101.

In step S5, the wire 101 is supported and bound by a portion of the outer skin 102 formed in the first injection molding groove 21, so that the wire 101 is not bent by the glue injected into the second injection molding groove 41, thereby ensuring that the formed outer skin 102 can wrap the wire 101, and improving the quality of injection molding.

According to the cable sheath injection molding method provided by the embodiment, the upper die assembly 2 is used for forming the sheath 102 of the second side surface of the wire 101, the second lower die assembly 4 is used for forming the sheath 102 of the first side surface of the wire 101, the first lower die assembly 3 can support the first side surface of the wire 101 when forming the sheath 102 of the second side surface of the wire 101, so that the support block 32 of the first lower die assembly 3 can act as a thimble to prevent the wire 101 from being askew when injecting the sizing material into the first injection molding groove 21 through the first injection molding hole 22 of the upper die assembly 2, and the wire 101 can be supported and bound through the formed partial sheath 102 when injecting the sizing material into the second injection molding groove 41 through the second injection molding hole 42, so that the wire 101 can not be askew, the formed sheath 102 can be wrapped around the wire 101 smoothly, the situation that the wire 101 is burst out of the sheath 102 is prevented, and the rejection rate is reduced.

Alternatively, when the cable sheath injection mold includes the positioning mold strip 5, the positioning mold strip 5 may be placed in the first positioning groove 23 and the second positioning groove 33, or the first positioning groove 23 and the third positioning groove 43 before the product to be wrapped 100 is placed, and the inserting section 103 is inserted into the fourth positioning groove 51 of the positioning mold strip 5 when the product to be wrapped 100 is placed, so as to achieve positioning of the product.

It should be noted that after demolding, the cable is surrounded in sections to realize primary encapsulation, and then the earphone or other equipment after the primary encapsulation is completed is further put into a common mold to carry out secondary encapsulation, and the earphone or other equipment is not required to be positioned by adopting the supporting block 32 during secondary encapsulation and is directly put into a mold cavity of the mold to carry out secondary encapsulation, so that the remaining exposed part can be filled and encapsulated, and the wire can be completely encapsulated. That is, after step S5, a secondary encapsulation step is further included, and in this embodiment, the cable after the primary encapsulation may be subjected to secondary encapsulation by using an injection mold in the prior art, so as to further ensure the encapsulation effect.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (10)

1. Cable crust injection mold, its characterized in that includes:

an upper die assembly (2), wherein the upper die assembly (2) is provided with a first injection molding groove (21) and a first injection molding hole (22) communicated with the first injection molding groove (21);

the first lower die assembly (3) is provided with a product positioning groove (31) and a supporting block (32) arranged in the product positioning groove (31), wherein the supporting block (32) is used for supporting a first side surface of a wire (101) of a product (100) to be wrapped;

a second lower die assembly (4) having a second injection molding groove (41) and a second injection molding hole (42) communicating with the second injection molding groove (41);

the upper die assembly (2) is selectively connected with the first lower die assembly (3) and the second lower die assembly (4), the upper die assembly (2) is connected with the first lower die assembly (3) to form a sheath (102) on the second side of the wire (101), and the upper die assembly (2) is connected with the second lower die assembly (4) to form the sheath (102) on the first side of the wire (101).

2. The cable sheath injection mold of claim 1, wherein a length of the support block (32) is configured to be substantially equal to a length of the wire (101), and a width of the support block (32) is configured to be substantially equal to a width of the wire (101).

3. The cable sheath injection mold according to claim 1, further comprising a positioning mold bar (5), wherein the upper mold assembly (2) has a first positioning groove (23), the first lower mold assembly (3) has a second positioning groove (33), the second lower mold assembly (4) has a third positioning groove (43), and the positioning mold bar (5) is inserted into a first positioning hole formed by the cooperation of the first positioning groove (23) and the second positioning groove (33) or a second positioning hole formed by the cooperation of the first positioning groove (23) and the third positioning groove (43).

4. A cable sheath injection mould according to claim 3, characterized in that the positioning mould strip (5) has a fourth positioning groove (51), the fourth positioning groove (51) being configured for insertion of one end of the product (100) to be sheathed to assist in positioning the product (100) to be sheathed.

5. A cable sheath injection mould according to claim 3, characterized in that the cross section of the positioning strips (5) is polygonal.

6. A cable sheath injection mould according to claim 3, characterized in that the first positioning groove (23) is provided through the upper mould assembly (2), the second positioning groove (33) is provided through the first lower mould assembly (3), the third positioning groove (43) is provided through the second lower mould assembly (4), and the length of the positioning mould strip (5) is greater than the lengths of the first positioning groove (23), the second positioning groove (33) and the third positioning groove (43).

7. The cable sheath injection mold according to any one of claims 1-6, wherein two of the first injection holes (22) are provided, and two of the first injection holes (22) are arranged at intervals along the width direction of the first injection groove (21);

and/or two second injection holes (42) are arranged, and the two second injection holes (42) are arranged at intervals along the width direction of the second injection groove (41).

8. Cable sheath injection mould according to any one of claims 1-6, characterized in that the upper mould assembly (2) further has a positioning structure (24), the positioning structure (24) being used for positioning the product (100) to be sheathed.

9. The cable sheath injection mold according to any one of claims 1 to 6, further comprising a plurality of first connecting posts (6), wherein one ends of the plurality of first connecting posts (6) are connected to the upper mold assembly (2), the other ends of the plurality of first connecting posts are protruded from the upper mold assembly (2), the first lower mold assembly (3) and the second lower mold assembly (4) are respectively provided with a plurality of connecting holes (34) corresponding to the first connecting posts (6) one by one, and the other ends of the first connecting posts (6) are used for being inserted into the connecting holes (34) of the first lower mold assembly (3) or the second lower mold assembly (4).

10. A cable sheath injection molding method applied to the cable sheath injection mold according to any one of claims 1 to 9, characterized by comprising the steps of:

placing the product (100) to be wrapped in a product positioning groove (31) or a first injection molding groove (21);

connecting the upper die assembly (2) with the first lower die assembly (3) and enabling the supporting block (32) to support the first side surface of the wire (101) of the product (100) to be wrapped;

injecting glue material into the first injection groove (21) through the first injection hole (22) to form a skin (102) on the second side surface of the wire (101);

separating the upper die assembly (2) from the first lower die assembly (3) and connecting the upper die assembly (2) with the second lower die assembly (4);

glue is injected into the second injection groove (41) through the second injection hole (42) to form the outer skin (102) on the first side of the wire (101).