CN215320281U

CN215320281U - Injection molding mold with multiple feed inlets

Info

Publication number: CN215320281U
Application number: CN202121195653.1U
Authority: CN
Inventors: 张宏卓
Original assignee: Guangdong Mingji High Tech Electronics Co ltd
Current assignee: Guangdong Mingji High Tech Electronics Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-12-28
Anticipated expiration: 2031-05-31

Abstract

The utility model relates to an injection moulding technical field, concretely relates to injection moulding mould of many feed inlets, including last mould and lower mould, a plurality of lower die cavities have been seted up to the lower mould, go up the mould seted up with a plurality of last die cavities that the lower die cavity corresponds still including connecting in the mouth of a river between two adjacent last die cavities andor two adjacent lower die cavities, go up the mould and still seted up and supply the injecting glue rifle to stretch into the spliced eye of injecting glue is accomplished to the upside edge in mouth of a river, the lower extreme of spliced eye with the mouth of a river intercommunication, the quantity of spliced eye with the number in mouth of a river corresponds. Adopt the mode of moulding plastics of many spliced eye injecting glue, thereby the current mode of moulding plastics that adopts the arborescent mouth of a river of single feed inlet cooperation to realize a plurality of die cavities of moulding plastics simultaneously of relative ratio, the mode of moulding plastics of many spliced eye cooperation mouths of a river of this application can reduce the length at the mouth of a river to minimumly, and the mouth of a river total length of this application has reduced the raw materials waste only one tenth of the current mould of same cave position volume more.

Description

Injection molding mold with multiple feed inlets

Technical Field

The application relates to the technical field of injection molding, in particular to an injection molding mold with multiple feed inlets.

Background

The junction of the wire harness and the PCB of the existing electronic product needs to be subjected to injection molding and curing through an injection molding process to form an encapsulation internal mold, so that the purpose of protecting welding spots and connecting wires is achieved. The internal mold packaging device is particularly suitable for internal mold packaging processing of the joint of a PCB (printed circuit board) and a wiring harness of a USB connecting male head or female head. The existing injection molding process mainly comprises LE-PE materials and hot melt adhesive as raw materials, wherein liquid rubber materials are added into a water port through a single feed port and are respectively injected into corresponding die cavities through a plurality of sub-runners. However, the mold design with the single feeding hole has the disadvantages of more sub-runners, high material occupation ratio of the water gap and low raw material utilization rate, so that the problem that how to effectively overcome the technical defects is needed to be solved by the current market is solved.

Disclosure of Invention

In order to overcome the shortcoming and not enough that exist among the prior art, the utility model aims to provide an injection moulding mould of many feed inlets, this injection moulding mould of many feed inlets adopts the mode of moulding plastics of many spliced eye injecting glue, thereby the current mode of moulding plastics that adopts the arborescent mouth of single feed inlet cooperation to realize a plurality of die cavities of single feed inlet simultaneously moulding plastics of the present adoption of relative ratio, the mode of moulding plastics of many spliced eye cooperation many mouths of the mouth of a river of this application can reduce the length of mouth of a river to minimumly, the mouth of a river total length of this application is only one tenth of the current mould of same cavitation volume more, greatly reduced because the mouth of a river expects the raw materials waste that leads to the fact excessively.

The purpose of the application is realized by the following technical scheme: the utility model provides an injection moulding mould of many feed inlets, includes mould and lower mould, a plurality of lower die cavitys have been seted up to the lower mould, go up the mould seted up with a plurality of last die cavitys that the lower die cavity corresponds still including connecting in the mouth of a river between two adjacent last die cavitys andor two adjacent lower die cavitys, go up the mould and still seted up and supply the injecting glue rifle to stretch into the spliced eye of upside edge completion injecting glue in the mouth of a river, the lower extreme of spliced eye with the mouth of a river intercommunication, the quantity of spliced eye with the number in mouth of a river corresponds.

The plug hole is composed of a main round hole, an inverted cone shrinkage hole, an assembly hole and a glue injection hole which are sequentially connected, and the lower end of the glue injection hole is communicated with the water gap.

The positioning module faces towards one side of the upper die cavity and/or the lower die cavity and is provided with a plurality of positioning holes for inserting the end parts of the products to be injection molded.

The injection molding machine further comprises a limiting strip used for pressing a product to be injection molded downwards, and a plurality of limiting grooves matched with the product to be injection molded are formed in the lower end face of the limiting strip.

The lower die is provided with a lower assembly groove, the upper die is provided with an upper assembly groove, the lower half part of the positioning module is positioned in the lower assembly groove, and after die assembly is carried out, the upper half part of the positioning module is clamped into the upper assembly groove.

The limiting groove is located between the upper die cavity and the positioning hole, and the limiting strip is fixed on the upper die.

The lower die is fixed with a die assembly alignment column, and the upper die is provided with a die assembly alignment hole for the die assembly alignment column to be inserted.

The mould closing device further comprises an opening and closing driving mechanism for driving the upper mould and the lower mould to complete mould closing.

The opening and closing driving mechanism comprises an upper transverse plate, at least two guide columns arranged in parallel, a sleeve sleeved outside the guide columns, a lower transverse plate and a lifting motor or a lifting cylinder, the upper die is fixed on the upper transverse plate, the upper ends of the guide columns are fixedly connected with the upper transverse plate, the lower ends of the guide columns are fixedly connected with the lower transverse plate, and the output ends of the lifting motor or the lifting cylinder are connected with the lower transverse plate.

The beneficial effect of this application lies in: the injection molding die adopts an injection molding mode of injecting glue through multiple insertion holes, and compared with the existing injection molding mode of simultaneously injecting multiple mold cavities through a single feed inlet and a tree-shaped water gap by adopting a single feed inlet, the injection molding mode of simultaneously injecting the multiple mold cavities through the single insertion hole and the corresponding water gap communicated with one insertion hole can reduce the length of the water gap to be the lowest, the total length of the water gap is much lower than one tenth of the existing die with the same cavity position quantity of LE-PE (polyethylene) materials, so that the raw material waste caused by excessive water gap materials is greatly reduced, the existing multi-mold cavity injection molding mode of matching the single feed inlet and the tree-shaped water gap is adopted, one bundle of water gap materials corresponds to multiple molded products, the water gap materials are adhered to the multiple products, the water gap materials are extremely inconvenient to cut off, one side of the two products is respectively connected to the two ends of the water gap corresponding to the two products, and the cutting is simple and convenient, the formed product is not easy to be damaged.

Drawings

FIG. 1 is a perspective view of the present application;

FIG. 2 is a partial structural cross-sectional view of the present application;

FIG. 3 is another perspective view of the present application;

FIG. 4 is a partial exploded view of the present application;

FIG. 5 is another angular schematic of FIG. 4 of the present application;

fig. 6 is a schematic structural view of a gun head of a glue injection gun according to embodiment 1 of the present application;

fig. 7 is a schematic structural view of a gun head of a glue injection gun according to embodiment 2 of the present application;

fig. 8 is a partially enlarged view of the area a in fig. 2 of the present application.

The reference signs are: the mold comprises an upper mold 301, an upper mold cavity 302, a lower mold 303, a lower mold cavity 304, a water gap 305, a plug hole 306, a main round hole 307, an inverted cone shrinkage hole 308, an assembly hole 309, a glue injection hole 310, a positioning module 311, a positioning hole 312, a limiting strip 313, a limiting groove 314, an upper assembly groove 315, a lower assembly groove 316, an alignment column 317, an alignment hole 318, an upper transverse plate 319, a guide column 320, a sleeve 321, a lower transverse plate 322, a lifting motor or a lifting cylinder 323, a gun head 324, a guide cylinder 325, a limiting inverted cone 326, a middle cylinder 327 and a glue injection conical head 328.

Detailed Description

For the convenience of understanding of those skilled in the art, the present application will be further described with reference to the following examples and accompanying fig. 1 to 7, and the content of the embodiments is not limited to the present application.

Embodiment 1, a multi-feed-port injection molding mold, including last mould 301 and lower mould 303, a plurality of lower die cavities 304 have been seted up to lower mould 303, go up mould 301 and seted up a plurality of last die cavities 302 that correspond with lower die cavity 304, still include the mouth of a river 305 of connecting between two adjacent last die cavities 302 andor two adjacent lower die cavities 304, go up mould 301 and still seted up and supply the injecting glue rifle to stretch into the grafting hole 306 that accomplishes the injecting glue in the upside edge of mouth of a river 305, the lower extreme of grafting hole 306 with mouth of a river 305 communicates, the quantity of grafting hole 306 with the number of mouth of a river 305 corresponds.

The plug hole 306 is composed of a main round hole 307, an inverted cone shrinkage hole 308, an assembling hole 309 and a glue injection hole 310 which are connected in sequence, and the lower end of the glue injection hole 310 is communicated with the water gap 305.

Specifically, two ends of the nozzle 305 communicate with opposite sides of two adjacent upper mold cavities 302 and/or two adjacent lower mold cavities 304, respectively. The aperture of the main round hole 307 is equal to the maximum aperture of the inverted cone shrinkage hole 308, the minimum aperture of the inverted cone shrinkage hole 308 is equal to the aperture of the assembly hole 309, the aperture of the glue injection hole 310 is smaller than the aperture of the assembly hole 309, and the hole depth of the glue injection hole 310 is smaller than 0.5 cm.

The glue injection gun applied to the embodiment comprises a gun head 324 matched with the inserting hole 306.

The shape of the gun head 324 adopts an inverted cone structural design, the outer diameter of the minimum end of the gun head 324 is smaller than the aperture of the glue injection hole 310, in the practical application process, the gun head 324 is inserted into the insertion hole 306, the foremost end of the gun head 324 is inserted into the glue injection hole 310, and when the gun head 324 is inserted in place, the side surface of the gun head 324 and the upper end opening of the glue injection hole 310 are closed to start glue injection.

A positioning module 311 for fixing the end of the product to be injection-molded is clamped between the upper mold 301 and the lower mold 303, and a plurality of positioning holes 312 for inserting the end of the product to be injection-molded are arranged on one side of the positioning module 311 facing the upper mold cavity 302 and/or the lower mold cavity 304.

The injection molding machine further comprises a limiting strip 313 used for pressing a product to be injection molded downwards, and a plurality of limiting grooves 314 matched with the product to be injection molded are formed in the lower end face of the limiting strip 313.

The lower die 303 is provided with a lower assembly groove 316, the upper die 301 is provided with an upper assembly groove 315, the lower half part of the positioning module 311 is located in the lower assembly groove 316, and after die assembly, the upper half part of the positioning module 311 is clamped in the upper assembly groove 315. Specifically, the positioning module 311 is fixedly connected to the lower assembling groove 316.

The limiting groove 314 is located between the upper mold cavity 302 and the positioning hole 312, and the limiting strip 313 is fixed to the upper mold 301. Specifically, treat that injection moulding product can be for the connector of taking the pencil, take female first/public first of USB of pencil, take female first/public first or other connectors of taking the pencil of Type-C of pencil. In the practical application of this application, treat that the tip of injection moulding product inserts and accomplishes preliminary location in locating hole 312 of locating module 311, after the compound die, spacing strip 313 and spacing groove 314 treat that injection moulding product is close to the injection moulding product position of treating in locating hole 312 drill way and carry out the secondary location, and positioning stability is good, treats that injection moulding product is also difficult for taking place to become flexible or shift after receiving the impact of liquid glue solution, guarantees to treat injection moulding product's shaping quality.

The lower die 303 is fixed with a die-closing alignment column 317, and the upper die 301 is provided with a die-closing alignment hole 318 for the die-closing alignment column 317 to be inserted.

The mold clamping device further comprises an opening and closing driving mechanism for driving the upper mold 301 and the lower mold 303 to complete mold clamping.

The opening and closing driving mechanism comprises an upper transverse plate 319, at least two guide posts 320 arranged in parallel, a sleeve 321 sleeved outside the guide posts 320, a lower transverse plate 322, and a lifting motor or a lifting cylinder 323, wherein the upper die 301 is fixed on the upper transverse plate 319, the upper ends of the guide posts 320 are fixedly connected with the upper transverse plate 319, the lower ends of the guide posts 320 are fixedly connected with the lower transverse plate 322, and the output ends of the lifting motor or the lifting cylinder 323 are connected with the lower transverse plate 322.

In the injection molding process of the packaging wire harness at the joint of the wire harness of the connector or the connecting line and the PCB, the LE-PE material is low in price (12.3 yuan/kg), high in hardness and good in product protection performance, and is widely applied, the proportion of the LE-PE material adopted in the current wire harness injection molding process is about 95%, and the rest is high-price hot melt adhesive. Although the LE-PE material is high in quality and low in price, due to the fact that the viscosity and the hardness of the LE-PE material are high, the injection pressure required in the existing injection molding process is also extremely high, meanwhile, the water gap 305 of the existing molding die is designed by adopting a single feeding hole to be matched with the tree-shaped water gap 305 of the multi-diversion water gap 305, the length of the water gap 305 is long, the pressure required by the LE-PE material injection molding is greatly increased, and the liquid rubber material forms high-speed and high-pressure rubber material fluid under the action of high pressure to form great impact force on fine lines and welding points of the wire harnesses, so that the product rejection rate caused by the fact that the rubber material fluid breaks the fine lines or breaks the welding points is always high. The pressure of an injection molding process is reduced by adopting hot melt adhesive by part of manufacturers, so that the rejection rate of products is reduced, but the price of the hot melt adhesive is high (130 yuan/kg), the hot melt adhesive is soft after being cured and molded, the hardness of the hot melt adhesive is low, the protection degree of a wire harness and a welding spot at a joint is low, the joint is easy to damage and the problem of open circuit is caused in the use process of the products, the comprehensive service life of the products is short, the low pressure cannot be really realized by the conventional low-pressure plastic machine applying the hot melt adhesive, the low pressure can be realized only when the hot melt adhesive is adopted, and LE-PE materials cannot be adopted for low-pressure injection molding. The utility model provides an injection moulding mould of many feed inlets adopts the structural design of spliced eye 306 and the one-to-one injecting glue of mouth of a river 305, relative ratio prior art mouth of a river 305 only is used for connecting two adjacent die cavitys, the mouth of a river 305 length of this application is less than one tenth of prior art under the prerequisite of equal die cavity quantity, the edge that the injecting glue rifle can stretch into mouth of a river 305 simultaneously carries out the injecting glue, the length of mouth of a river 305 has further been shortened, thereby the required pressure of LE-PE material injection moulding has greatly been reduced, realize low pressure injection moulding, thereby solved because the sizing material fluid breaks the fine rule or breaks the problem that the product rejection rate that the solder joint arouses also remains high always, production efficiency and economic benefits have greatly been improved.

Example 2

This embodiment differs from embodiment 1 in the construction of the lance tip 324.

The lance head 324 is composed of a guide cylinder 325, a limiting inverted cone 326, a middle cylinder 327 and a glue injection conical head 328 which are connected in sequence, when the lance head 324 is in practical application, the guide cylinder 325 is matched with the main round hole 307 of the insertion hole 306 to complete the guide and positioning of the lance head 324, the limiting inverted cone 326 is matched with the inverted cone shrinkage hole 308 of the insertion hole 306 to complete the insertion stroke limiting of the lance head 324, meanwhile, the air tightness of the lance head 324 and the insertion hole 306 is enhanced, the middle cylinder 327 is matched with the assembly hole 309 to perform secondary alignment operation, the matching precision is guaranteed, meanwhile, the closing of the glue injection hole 310 is completed, the airtightness between the lance head 324 and the insertion hole 306 is further enhanced, and the glue injection conical head 328 is inserted into the glue injection hole 310 to perform glue injection work.

The above embodiments are preferred implementations of the present application, and the present application can be implemented in other ways without departing from the spirit and scope of the present application.

Claims

1. The utility model provides an injection moulding mould of many feed inlets, includes mould and lower mould, its characterized in that: the lower mould is provided with a plurality of lower mould cavities, the upper mould is provided with a plurality of upper mould cavities corresponding to the lower mould cavities and further comprises a water gap connected between two adjacent upper mould cavities and/or two adjacent lower mould cavities, the upper mould is further provided with an inserting hole for a glue injection gun to extend into the upper side edge of the water gap to complete glue injection, the lower end of the inserting hole is communicated with the water gap, and the number of the inserting holes corresponds to the number of the water gaps.

2. A multi-feed-opening injection molding mold according to claim 1, characterized in that: the spliced eye comprises main round hole, back taper shrinkage cavity, pilot hole and the notes gluey hole that connects gradually, the lower extreme in notes gluey hole with the mouth of a river intercommunication.

3. A multi-feed-opening injection molding mold according to claim 1, characterized in that: go up the mould and press from both sides between the lower mould and be equipped with the locating module who is used for the fixed tip of treating injection moulding product, locating module orientation last die cavity andor lower die cavity one side is provided with a plurality of confessions and treats the tip male locating hole of injection moulding product.

4. A multi-feed-opening injection molding mold according to claim 3, characterized in that: the injection molding machine is characterized by further comprising a limiting strip used for pressing a product to be injection molded downwards, wherein a plurality of limiting grooves matched with the product to be injection molded are formed in the lower end face of the limiting strip.

5. A multi-feed-opening injection molding mold according to claim 3, characterized in that: the lower die is provided with a lower assembly groove, the upper die is provided with an upper assembly groove, the lower half part of the positioning module is positioned in the lower assembly groove, and after die assembly is carried out, the upper half part of the positioning module is clamped into the upper assembly groove.

6. A multi-feed-port injection molding mold according to claim 4, characterized in that: the limiting groove is located between the upper die cavity and the positioning hole, and the limiting strip is fixed on the upper die.

7. A multi-feed-opening injection molding mold according to claim 1, characterized in that: the lower die is fixed with a die assembly counterpoint post, and the upper die is provided with a die assembly counterpoint hole for the die assembly counterpoint post to be inserted.

8. A multi-feed-opening injection molding mold according to claim 1, characterized in that: the mould closing device also comprises an opening and closing driving mechanism for driving the upper mould and the lower mould to complete mould closing.

9. A multi-feed-opening injection molding mold according to claim 8, characterized in that: the opening and closing driving mechanism comprises an upper transverse plate, at least two guide columns arranged in parallel, a sleeve sleeved outside the guide columns, a lower transverse plate and a lifting motor or a lifting cylinder, the upper die is fixed on the upper transverse plate, the upper ends of the guide columns are fixedly connected with the upper transverse plate, the lower ends of the guide columns are fixedly connected with the lower transverse plate, and the output ends of the lifting motor or the lifting cylinder are connected with the lower transverse plate.