CN219006868U - Injection mold and glue injection port structure thereof - Google Patents

Abstract

The utility model discloses an injection mold and a glue injection port structure thereof, wherein the glue injection port structure comprises a glue port main body, a glue inlet end and a glue outlet end, wherein the glue inlet end and the glue outlet end are provided with flaring shapes along the direction from the glue inlet end to the glue outlet end; the glue outlet ends are provided with a plurality of glue outlets at intervals, and the cross section of any glue outlet is gradually reduced along the flowing-out direction of the glue solution. The method can improve the flowing vortex shape of the liquid glue in the die core, on one hand, reduces the impact force of the material on the element, and on the other hand, reduces the problem of glue shortage caused by premature solidification of the bonding line of the cold material and the new material. The glue outlet of the utility model can store a larger amount of glue solution compared with the existing cylindrical glue outlet main body because the glue outlet main body is in a flaring shape.

Description

Injection mold and glue injection port structure thereof

Technical Field

The utility model belongs to the technical field of low-pressure injection molding equipment, and particularly relates to an injection mold and a glue injection port structure thereof.

Background

The low-pressure injection molding process is a packaging process for injecting a hot-melt low-pressure injection molding material into a mold and rapidly solidifying the hot-melt low-pressure injection molding material by using very low injection molding pressure (0.15-4 MPa), and has excellent sealing property and excellent physical and chemical properties to achieve the effects of insulation, temperature resistance, shock resistance, vibration reduction, moisture resistance, water resistance, dust resistance, chemical corrosion resistance and the like, thereby playing a good role in protecting electronic elements.

In the traditional electronic assembly process, the low-pressure injection molding process is to put the packaging material into a mold under very small injection pressure (1.5-40 bar) and rapidly solidify and mold (5-50 seconds) so as to achieve the purposes of heat preservation, temperature resistance, impact resistance, vibration reduction, moisture resistance, water resistance, dust resistance, chemical corrosion resistance and the like. The application fields of the micro-switch are very wide, and the micro-switch comprises a Printed Circuit Board (PCB), automobile electronics, an automobile wire harness, an automobile connector, a sensor, a micro-switch, an antenna and the like.

Since the low-pressure injection molding product belongs to a product which cannot be secondarily molded after molding, the appearance requirement of the low-pressure injection molding product is particularly important for saving process loss of a factory of the low-pressure injection molding process. In the prior art, the injection port of the low pressure injection mold is shown in fig. 1, the upper mold assembly 1' comprises an upper mold 11', an upper mold core 12' and an upper mold runner 13', as shown in fig. 2, the lower mold assembly 2' comprises an upper mold 21', an upper mold core 22' and an upper mold runner 23', as shown in fig. 3, the upper mold runner 13' and the lower mold runner 23' are both composed of a runner part 231' and a glue injection port part 232', the glue injection port part 232' adopts a glue port design of a main body of a glue port of a cylindrical part and a taper head structure, and the applicant finds that the above-mentioned glue injection port structural design, and the bonding line of cold material and new material is solidified too early during glue injection, so that the glue shortage phenomenon is caused, and the injection quality of products is further affected. Therefore, a new glue injection port structure is needed to solve the above technical problems.

Disclosure of Invention

Aiming at the technical problems, the utility model aims at: the design of the glue injection port can improve the flowing vortex shape of liquid glue in the die core, reduce the problem of glue shortage caused by premature solidification of a combination line of cold material and new material, and improve the injection molding yield of products.

The technical scheme of the utility model is as follows:

an object of the present utility model is to provide a glue injection port structure, which comprises a glue port main body, a glue injection port and a glue injection port, wherein the glue port main body is provided with a glue inlet end and a glue outlet end and is in a flaring shape along the direction from the glue inlet end to the glue outlet end;

the glue outlet ends are provided with a plurality of glue outlets at intervals, and the cross section of any glue outlet is gradually reduced along the flowing-out direction of the glue solution.

The utility model further aims to provide an injection mold, which comprises an upper mold, a lower mold and a glue injection runner arranged in the upper mold and the lower mold, wherein an upper mold core is supported on the upper mold, a lower mold core is supported on the lower mold, both the upper mold core and the lower mold core are provided with profiling structures matched with products to be injection molded, the glue injection runner is provided with a glue injection port for conveying glue solution into the upper mold core and the lower mold core after mold closing, and the glue injection port is of the structure.

Compared with the prior art, the utility model has the advantages that:

the glue injection port structure can improve the flowing vortex shape of liquid glue in the die core, on one hand, reduces the impact force of the material on the element, and on the other hand, reduces the problem of glue shortage caused by premature solidification of the bonding line of cold material and new material. The glue outlet of the utility model can store a larger amount of glue solution compared with the existing cylindrical glue outlet main body because the glue outlet main body is in a flaring shape.

Drawings

The utility model is further described below with reference to the accompanying drawings and examples:

FIG. 1 is a schematic diagram of a prior art upper mold assembly of an injection mold;

fig. 2 is a schematic structural view of a lower mold assembly of an injection mold of the prior art.

FIG. 3 is a schematic view of a runner and a glue injection port of an injection mold according to the prior art;

FIG. 4 is a schematic structural view of an upper mold assembly of an injection mold according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a lower mold assembly of an injection mold according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a runner and a glue injection port structure of an injection mold according to an embodiment of the present utility model.

Fig. 7 is a schematic structural diagram of a glue injection port structure of an injection mold according to an embodiment of the present utility model;

FIG. 8 is a schematic view of the upper mold and upper mold runner of the upper mold assembly of the injection mold according to the embodiment of the present utility model;

FIG. 9 is a schematic view of the enlarged partial structure of the portion A in FIG. 8;

fig. 10 is a schematic view of a structure of an injection mold according to an embodiment of the present utility model when the injection mold is closed.

Wherein: 1. an upper die assembly; 11. an upper die; 111. an upper mold runner; 1111. a caulking groove; 1112. an upper partition wall; 1113. a glue outlet is formed; 112. an upper die core groove; 12. an upper die core; 13. an upper mold runner; 131. a flow path portion; 132. a glue injection port; 1320. a glue port main body; 13201. a glue inlet end; 1321. a glue outlet; 1322. spacing; 2. a lower die assembly; 21. a lower die; 22. a lower die core; 23. and a lower mold runner.

Detailed Description

The objects, technical solutions and advantages of the present utility model will become more apparent by the following detailed description of the present utility model with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

Examples:

referring to fig. 6 to 7, a glue injection port structure of the present embodiment includes a glue port main body 1320, the glue port main body 1320 has a glue inlet 13201 and a glue outlet, as shown in fig. 7, the left rear end of the glue port main body 1320 is the glue inlet 13201, and the right front end is the glue outlet (not labeled). Along the direction from the glue inlet end 13201 to the glue outlet end, the glue inlet main body 1320 is in a flaring shape, a plurality of glue outlets 1321 are arranged on the glue outlet end at intervals, and the cross section of any glue outlet 1321 is gradually reduced along the glue outflow direction. That is, by means of improved design of the glue injection port, the structure of the glue injection port is horn-shaped, the glue outlet end is provided with a plurality of glue outlets with gradually reduced cross sections, compared with the glue injection port with the conventional cone-shaped structure, the glue injection port structure can improve the flowing vortex shape of liquid glue in the mold core through the test verification of the applicant, on one hand, the impact force of materials on elements is reduced, and on the other hand, the problem of glue shortage caused by premature solidification of a bonding line of cold materials and new materials is reduced. Still another point is that since the glue port body 1320 is flared, the glue outlet of the present utility model can store a larger amount of glue solution than the existing cylindrical glue port body.

According to some embodiments of the utility model, as shown in fig. 7, the glue outlet 1321 is tapered. All glue outlets 1321 are of uniform size. The spacing between any two adjacent glue outlets 1321 is equal. The uniformity of glue solution outflow is ensured, and the quality of injection molding products can be improved.

The embodiment of the present utility model further provides an injection mold, referring to fig. 4 to 10, which includes an upper mold assembly 1 and a lower mold assembly 2, wherein the upper mold assembly 1 includes an upper mold 11 and an upper mold core 12, an upper mold core groove 112 is formed on the upper mold 11 for receiving the upper mold core 12, the lower mold assembly 2 includes a lower mold 21 and a lower mold core 22, and a lower mold core groove (not shown) is formed on the lower mold 21 for receiving the lower mold core 22. The upper die core 12 and the lower die core 22 are provided with profiling structures (not shown) matched with products to be injection molded, the profiling structures are provided with profiling rubber surfaces of the injection molded products (PCBA products are taken as examples in the utility model, that is to say, the profiling structures are provided with PCBA finished product colloid profiling rubber surfaces), and preferably, the surfaces of the PCBA finished product colloid profiling rubber surfaces are provided with design fire patterns (not shown); in the discharging process, a discharging gap between a copper worker and a steel material is called a spark position, a rough work spark is generally 10 to 50, a young work spark position is generally 5 to 15, spark lines of spark line type are used for preventing vacuum of a glue surface and a die core surface after forming, and the machining precision of the die core is required to be controlled within a range of 0.03 MM. In order to facilitate injecting glue solution into the upper mold core and the lower mold core for realizing injection molding, the injection mold of the embodiment of the utility model further comprises a glue injection runner arranged in the upper mold 11 and the lower mold 21, wherein the glue injection runner is provided with a glue injection port which flows into the upper mold core 11 and the lower mold core 21 for conveying the glue solution into the upper mold core 11 and the lower mold core 21, and the glue injection port is of the glue injection port structure of the embodiment. The above-mentioned glue injection port structure is adopted, so that the glue injection port structure at least has the beneficial effects of the glue injection port structure of the above-mentioned embodiment, and detailed description is omitted.

According to some preferred embodiments of the present utility model, the injection runner is a part of the inside of the mold, and in particular, the injection runner is composed of two parts of the upper mold runner 13 and the lower mold runner 23. The upper mold runner 13 is integrally formed on the upper mold 11 and is recessed inwards, the lower mold runner 23 is integrally formed in the lower mold 21 and is recessed inwards, and the upper mold runner 13 and the lower mold runner 23 are symmetrically designed and enclose a complete glue injection runner after mold closing. The upper mold runner has a glue injection port, the lower mold runner also has a glue injection port, the glue injection port of the upper mold runner 13 is described as a glue injection port for convenience of description and distinction, the glue injection port of the lower mold runner 23 is described as a glue discharge port, and the glue injection port and the glue discharge port together form the glue injection port of the glue injection runner. Since the upper mold runner 13 and the lower mold runner 23 are symmetrical structures and the glue inlet and the glue outlet are also symmetrical structures, only one of them will be described in the embodiments of the present utility model. For example, in the embodiment of the present utility model, the upper mold runner 13 and the upper glue outlet are exemplarily described, as shown in fig. 8 and 9, a plurality of upper partition walls 1112 are disposed at the glue outlet end position of the upper mold runner 13, any two adjacent upper partition walls 1112 define an upper glue outlet 1113 having a reduced mouth shape or a cone shape, and the plurality of upper glue outlets 1113 are uniformly spaced in a row to form the glue outlet. Similarly, a plurality of lower partition walls (not shown) are arranged at the glue outlet end of the lower mold runner 23, any two adjacent lower partition walls define a lower glue outlet (not shown) in a necking shape or a conical shape, and the plurality of lower glue outlets are uniformly arranged at intervals in a row to form the lower glue outlet. As an alternative embodiment, as shown in fig. 6 and 7, the runner is a structural member separately embedded between the upper mold 11 and the lower mold 21, the structural member is provided with injection runners therein, and the structural member is correspondingly provided with glue injection ports according to the number of the upper mold core 12 and the lower mold core 22, in fig. 6, for example, one runner portion 131 and four glue injection ports 132 are taken as an example, the glue outlet end of each glue injection port 132 is provided with a plurality of glue outlet ports 1321 arranged at intervals, as shown in fig. 7, each glue outlet port 132 is defined by a hollow wall with a cone-shaped cross section, and an inverted V-shaped interval is formed between any two adjacent hollow walls. In order to facilitate the installation of the structural member, corresponding caulking grooves 1111 are formed in the upper die 11 and the lower die 21, wherein a plurality of partition walls 1112 matched with the spaces 1322 of the structural member are arranged at the caulking grooves 1111 corresponding to the glue outlet ends of the structural member.

For the number of the glue injection holes 132, according to the number of the upper mold cores 12 and the lower mold cores 22, as shown in fig. 4, the number of the upper mold cores 12 in the upper mold 11 is two, the number of the corresponding upper mold core grooves 112 is also two, as shown in fig. 5, the number of the lower mold cores 22 in the lower mold 21 is two, and the number of the corresponding lower mold core grooves is also two. The glue injection runner is arranged between the two mold cores, namely, the upper mold runner 13 is arranged between the two upper mold cores 12, and the lower mold runner 23 is arranged between the two lower mold cores 22. Correspondingly, four glue injection ports 132 are provided on the runner portion 131 of the glue injection runner, and as shown in fig. 6, the four glue injection ports 132 are provided on the runner portion 131 one after the other and one left and right. Taking the upper mold 21 as an example, two glue ports on the left side are correspondingly used for injecting glue into the upper mold core 12 on the left side as shown in fig. 4, and two glue ports on the right side are correspondingly used for injecting glue into the upper mold core 12 on the right side as shown in fig. 4. The lower die is the same as the upper die and will not be described again.

In some preferred embodiments of the present utility model, in order to facilitate the ejection of the injection product from the lower mold core 22 after the injection molding is completed and the mold is opened, a first ejector pin hole (not shown) is opened at the lower mold core 22, a first ejector pin (not shown) is movably installed in the first ejector pin hole, specifically, the first ejector pin is in clearance fit with the first ejector pin hole, and the injection product in the lower mold core 22 is ejected by the first ejector pin. Further preferably, a second ejector rod hole (not shown) is formed at the position of the lower mold runner 23, a second ejector rod (not shown) is movably assembled in the second ejector rod hole, and specifically, the second ejector rod is in clearance fit with the second ejector rod hole, and solidified glue solution in the lower mold runner 23 is ejected through the second ejector rod so as to facilitate flowing and conveying of the glue solution in subsequent injection molding. The number of the first ejector rod holes, the second ejector rod holes and the second ejector rods is not limited, and preferably, each lower die core corresponds to two first ejector rod holes and two first ejector rods, and the lower die runner is also provided with two second ejector rod holes and two second ejector rods.

It is to be understood that the above-described embodiments of the present utility model are merely illustrative of or explanation of the principles of the present utility model and are in no way limiting of the utility model. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present utility model should be included in the scope of the present utility model. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.

Claims (8)

1. The glue injection port structure is characterized by comprising a glue port main body, wherein the glue port main body is provided with a glue inlet end and a glue outlet end and is in a flaring shape along the direction from the glue inlet end to the glue outlet end;

the glue outlet ends are provided with a plurality of glue outlets at intervals, and the cross section of any glue outlet is gradually reduced along the flowing-out direction of the glue solution.

2. The glue injection port structure of claim 1, wherein the glue outlet port is tapered.

3. The glue injection port structure of claim 1, wherein all glue outlets are of uniform size.

4. The glue injection port structure of claim 1, wherein the spacing between any two adjacent glue outlets is equal.

5. An injection mold, including last mould and lower mould and locate the injecting glue runner in last mould and the lower mould, go up the mould and have accepted the mould benevolence on the mould, it has accepted the lower mould benevolence on the lower mould, go up mould benevolence and lower mould benevolence all are equipped with wait to mould plastics product assorted profile modeling structure, the injecting glue runner has after the compound die to go up the injecting glue mouth of mould benevolence and lower mould benevolence interior transport glue solution, its characterized in that, the injecting glue mouth is the injecting glue mouth structure of any one of claims 1 to 4.

6. The injection mold of claim 5 wherein said injection runner is defined by an upper mold runner and a lower mold runner, said upper mold runner being a recessed runner integrally formed on said upper mold and said lower mold runner being a recessed runner integrally formed on said lower mold;

the glue injection port comprises a glue feeding port and a glue discharging port, the glue feeding port is defined by a plurality of upper partition walls arranged at the glue discharging end of the upper mold runner, an upper glue discharging port is defined by any two adjacent upper partition walls, the glue discharging port is defined by a plurality of lower partition walls arranged at the glue discharging end of the lower mold runner, a lower glue discharging port is defined by any two adjacent lower partition walls, and the upper glue discharging port and the lower glue discharging port form the glue discharging port.

7. The injection mold of claim 6, wherein a first ejector pin hole is formed in the lower mold core, first ejector pins are movably arranged in the first ejector pin hole, and any one of the first ejector pins is in clearance fit with the corresponding first ejector pin hole.

8. The injection mold of claim 6 or 7, wherein a second ejector pin hole is formed in the lower mold runner, a second ejector pin is movably mounted in the second ejector pin hole, and any one of the second ejector pins is in clearance fit with the corresponding second ejector pin hole.

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