CN213227310U

CN213227310U - Three-color injection molding machine for notebook LSR foot pad

Info

Publication number: CN213227310U
Application number: CN202020660241.XU
Authority: CN
Inventors: 王洪涛
Original assignee: Suzhou Yichangtai Plastic Co ltd
Current assignee: Suzhou Fuying New Material Co.,Ltd.
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2021-05-18
Anticipated expiration: 2030-04-27

Abstract

The utility model discloses a three-color injection molding machine for notebook LSR foot pads, which comprises a base, wherein a horizontal injection molding machine body is arranged on the base, the horizontal injection molding machine body comprises a driving part, an injection mold and an injection molding system, the injection molding system comprises a first injection unit and a second injection unit, a fixed support is arranged on the side surface of the base, the fixed support is provided with an LSR injection unit for injecting liquid silica gel, one side of the base is provided with a mixing system connected with the LSR injection unit, the injection mold internally comprises a reversing disc connected with the driving part, the reversing disc comprises two movable mold inserts, the injection mold also comprises two fixed mold inserts, the technical proposal is that the notebook foot pads formed by three-color injection molding are integrated with the characteristics of three materials, the foot pads have better toughness, heat/temperature resistance and impact resistance, and the new-process notebook foot pads solve the problem that the traditional foot pads, the overall quality of the notebook is improved.

Description

Three-color injection molding machine for notebook LSR foot pad

Technical Field

The utility model relates to an injection mold, more specifically say, it relates to notebook LSR callus on sole three-colour injection moulding machine.

Background

The notebook foot pad is used for heightening a notebook, can play a role in auxiliary heat dissipation, particularly can raise the air inlet surface (D surface) of the notebook, increases the air inlet amount, has a good fan configuration, has a small inner space of the notebook and has a prominent auxiliary heat dissipation effect on the notebook with a large air inlet amount of the D surface, thereby improving the heat dissipation. In addition, for light and thin books, the heightening brings a little better hand feeling for typing, and the heightening has a certain positive effect on protecting cervical vertebra and wrist.

At present, a few high-end brand notebooks begin to adopt the callus on the sole on LST (liquid silica gel) surface, and liquid silica gel compares the rubber material advantage obvious, if: 1. the surface is not easy to adsorb dust, is not sticky, and has good oil resistance and chemical resistance; 2. through injection molding, the silky touch feeling can be obtained without secondary processing treatment such as hand feeling oil spraying; 3. the plasticizer is not contained, so that the wax precipitation phenomenon of TPE, TPU and other materials can not occur, the body health is influenced, and the safety and the environmental protection are realized; 4. the coating is relatively good, and the coating has excellent adhesion with a plurality of thermoplastic engineering plastics such as PC, PC/ABS, PA, PVC and the like; at present, the notebook foot pad is of a double-layer structure, the bottom layer is made of single-layer thermoplastic engineering plastic, the upper layer is a silica gel surface, the prior art generally adopts PC + LSR materials or ABS + LSR materials to combine the notebook foot pad, but under some special use conditions such as military use and medical use, the foot pad needs to have better toughness, heat resistance/low temperature resistance and impact resistance, and the traditional two-color injection molding can not meet the use requirements, so that the notebook foot pad with better performance needs to be developed to adapt to the use requirements under special environments, and new equipment and new processes are developed.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a notebook LSR callus on sole three-colour injection moulding machine and injection moulding technology thereof, it has the injection moulding requirement that can satisfy three-colour notebook foot subsides.

In order to achieve the above purpose, the utility model provides a following technical scheme:

notebook LSR callus on sole three-colour injection moulding machine, including the base, its characterized in that: the injection molding machine comprises a base, and is characterized in that a horizontal injection molding machine body is arranged on the base, the horizontal injection molding machine body comprises a driving part, an injection mold and an injection molding system, the injection molding system comprises a first injection unit and a second injection unit which are connected with the injection mold and are parallel to each other, a fixed support is arranged on the side face of the base, an LSR injection unit used for injecting liquid silica gel is arranged on the fixed support, a mixing system connected with the LSR injection unit is arranged on one side of the base, a reversing disc connected with the driving part is arranged in the injection mold, the driving part comprises a linear motion part used for driving mold opening and mold closing and a rotating part connected with the reversing disc, the reversing disc comprises two movable mold cores, and the injection mold further comprises two fixed mold cores corresponding to.

Preferably, the movable mold cores have the same structure and are symmetrical about the center of the reversing disc, the fixed mold core comprises a first fixed mold core for one-shot molding, and the fixed mold core further comprises a second fixed mold core for two-shot molding and three-shot molding.

Preferably, the LSR injection unit comprises an LSR nozzle connected to a sidewall of the injection mold.

Preferably, the LSR nozzle is provided with a cooling water jacket, and the cooling water jacket is connected with an industrial water chiller.

Preferably, each of the moving mold core and the fixed mold core is provided with a plurality of rows of cavities which are parallel to each other in a rectangular array.

Preferably, the one-shot unit injection molding material comprises PC, PC + GF or PBT, and the two-shot unit injection molding material comprises ABS, PC + ABS or TPU.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the three-color injection-molded notebook foot sticker integrates the characteristics of three materials, the foot pad has better toughness, heat resistance, low temperature resistance and impact resistance, the problem that the traditional foot pad is easily damaged is solved by the new-process notebook foot pad, and the overall quality of a notebook is improved;

2. the optimized three-color injection molding machine has the advantages that: (1) the injection system is quickly and simply installed; (2) a plurality of notebook foot pads can be formed in one-step injection molding mode, and injection molding is performed alternately through the reversing disc, so that the injection molding efficiency is high; (3) the three-shot LSR injection system is an independent control system, so that the material storage cost in the material pipe is greatly saved, the using amount of AB glue can be automatically adjusted, the generation of product burrs is reduced, and the labor cost can be reduced.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is a schematic view of a three-color injection mold.

In the figure: 1. a base; 2. a drive section; 3. injection molding a mold; 31. a movable mould core; 32. fixing a mold core; 321. a first fixed die core; 322. a second fixed mold core; 33. a cavity; 4. an injection molding system; 41. a shooting unit; 42. a second emission unit; 5. fixing a bracket; 51. an LSR injection unit; 511. an LSR nozzle; 5111. a cooling water jacket; 5112. a water chiller; 6. a mixing system; 7. and a reversing disc.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A three-color injection molding machine for a notebook LSR foot pad is disclosed, referring to FIGS. 1 and 2, which comprises a base 1, wherein a horizontal injection molding machine body is arranged on the base 1, the horizontal injection molding machine body is refitted on the basis of a DC600T standard horizontal two-color injection molding machine, the horizontal injection molding machine body comprises a driving part 2, an injection mold 3 and an injection system 4, the injection system 4 comprises a first injection unit 41 and a second injection unit 42 which are connected with the injection mold 3 and are parallel to each other, a fixed support 5 is arranged on the side surface of the base 1, an LSR injection unit 51 for injecting liquid silica gel is arranged on the fixed support 5, a mixing system 6 connected with the LSR injection unit 51 is arranged on one side of the base 1, a reversing disc 7 connected with the driving part 2 is arranged in the injection mold 3, the driving part 2 comprises a linear motion part for driving the mold opening and closing and a, the concrete structure of the rotating part can refer to the Chinese utility model patent with the patent number of 201721577860.7, the reversing disc 7 is positioned on the rotating part, the reversing disc 7 comprises two movable mould cores 31, and the injection mould 3 further comprises two fixed mould cores 32 corresponding to the movable mould cores 31.

The two movable mold cores 31 have the same structure and are symmetrical with respect to the center of the reversing plate 7, the fixed mold core 32 includes a first fixed mold core 321 for one-shot molding, and the fixed mold core 32 further includes a second fixed mold core 322 for two-shot molding and three-shot molding.

The LSR injection unit 51 includes an LSR nozzle 511 connected to a sidewall of the injection mold 3, and the LSR nozzle 511 is screwed to the injection mold 3 and communicates with the internal flow passage. The LSR nozzle 511 is provided with a cooling water jacket 5111, the cooling water jacket 5111 is connected with an industrial water cooler 5112, and the silica gel melts when meeting cold and solidifies when meeting heat, so that the LSR nozzle 511 needs to be cooled to keep the silica gel in a flowing state, and the precise control of the gel feeding amount is realized.

Each of the movable mold core 31 and the fixed mold core 32 is provided with a plurality of rows of cavities 33 in a rectangular array, which are parallel to each other, for improving the production efficiency.

The injection molding material of the first injection unit 41 comprises one or more of PC, PC + GF or PBT, the injection molding material of the second injection unit 42 comprises one or more of ABS, PC + ABS or TPU, and through the combination of the materials, the notebook foot sticker integrates the characteristics of the three materials, and the foot pad has better toughness, heat resistance, low temperature resistance and impact resistance.

The injection molding process mainly comprises the following steps:

(1) injection molding preparation: the injection mold 3 is driven to be closed through the linear motion part of the injection molding machine;

(2) an injection molding: injecting an injection molding plastic material into the first mold insert 321 by an injection unit 41, wherein the injection time is controlled to be 1.5 s;

(3) preparation of a second shot: opening the injection mold 3, driving the reversing disc 7180 degrees to reverse through the rotating part, so that the positions of the two movable mold cores 31 are exchanged, and closing the injection mold 3;

(4) two-shot molding: injecting a second injection molding plastic material into the second cavity 322 by the second injection unit 42, wherein the injection time is controlled to be 1.8s, and simultaneously, the step (2) is repeatedly executed;

(5) three-shot molding: mixing the materials by a mixing system 6 to form a liquid silica gel material, injecting the liquid silica gel into the second cavity insert 322 by an LSR injection unit 51, controlling the injection molding temperature at 120-;

(6) and (3) product molding: and (3) completing product injection molding, opening the injection mold 3, ejecting the formed part through an ejector pin, driving a reversing disc 7180-degree reversing through a rotating part, closing the injection mold 3, and skipping to the step (4).

Wherein, in step (2), the one-shot forming comprises one-section forming and two-section forming, and the pressure of the one-section forming is controlled as follows: 80Mba to 150Mba, the speed is controlled between 100mm/s and 280mm/s, and the glue feeding amount accounts for 50 to 80 percent; the two-stage forming pressure is controlled to be 40Mba-120Mba, the speed is 50 mm/s-200 mm/, and the glue feeding amount accounts for the ratio: 10 to 50 percent.

In the step (4), the two-shot forming comprises first-stage forming and second-stage forming, the pressure of the first-stage forming is controlled to be 200bar-500bar, the speed is controlled to be 50mm/s-100mm/s, and the glue feeding amount accounts for the ratio: 40 percent; the two-stage molding pressure is controlled to be 50 bar-300 bar, the speed is controlled to be 2mm/s-80mm/s, and the glue feeding amount accounts for the ratio: 60 percent.

In the step (5), the injection pressure is controlled to be 280-320bar, the holding pressure is controlled to be 175-210bar, and the injection speed is controlled to be 3-6 mm/s.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. Notebook LSR callus on sole three-colour injection moulding machine, including the base, its characterized in that: the injection molding machine comprises a base, and is characterized in that a horizontal injection molding machine body is arranged on the base, the horizontal injection molding machine body comprises a driving part, an injection mold and an injection molding system, the injection molding system comprises a first injection unit and a second injection unit which are connected with the injection mold and are parallel to each other, a fixed support is arranged on the side face of the base, an LSR injection unit used for injecting liquid silica gel is arranged on the fixed support, a mixing system connected with the LSR injection unit is arranged on one side of the base, a reversing disc connected with the driving part is arranged in the injection mold, the driving part comprises a linear motion part used for driving mold opening and mold closing and a rotating part connected with the reversing disc, the reversing disc comprises two movable mold cores, and the injection mold further comprises two fixed mold cores corresponding to.

2. The three-color injection molding machine for the notebook LSR foot pad according to claim 1, characterized in that: the movable mold cores have the same structure and are symmetrical about the center of the reversing disc, the fixed mold core comprises a first fixed mold core for one-shot molding, and the fixed mold core also comprises a second fixed mold core for two-shot molding and three-shot molding.

3. The three-color injection molding machine for the notebook LSR foot pad according to claim 2, characterized in that: the LSR injection unit comprises an LSR nozzle connected with the side wall of the injection mold.

4. The three-color injection molding machine for the notebook LSR foot pad according to claim 3, characterized in that: and a cooling water jacket is arranged on the LSR nozzle and connected with an industrial water cooler.

5. The three-color injection molding machine for the notebook LSR foot pad according to claim 2, characterized in that: each movable mould kernel and the fixed mould kernel are arranged in a rectangular array mode and provided with a plurality of rows of cavities which are parallel to each other.

6. The three-color injection molding machine for the notebook LSR foot pad according to claim 1, characterized in that: the first emission unit comprises PC, PC + GF or PBT, and the second emission unit comprises ABS, PC + ABS or TPU.