CN201279882Y - Double-color rubber frame injection molding device - Google Patents

Abstract

A double-color plastic frame injection molding device comprises a mold unit, at least one sliding unit, a pushing unit and a driving unit, wherein the mold unit comprises a female mold and a male mold. The sliding unit comprises a movable die which defines a die cavity together with the male die and the female die, and an inclined sliding block connected with the movable die. The pushing unit comprises a wedge-shaped block obliquely connected to the oblique sliding block. The driving unit is used for driving the pushing unit to move in the straight direction between a first position and a second position so as to drive the sliding unit to move transversely, the sliding unit can be subjected to primary injection molding in the mold cavity when the pushing unit moves to the first position, and the sliding unit moves back for a certain distance when the pushing unit moves to the second position so as to form a primary injection space for secondary injection molding. The utility model discloses can be in twice double-colored injection molding in same mould, so can reach reduce cost and reduce the processing procedure efficiency.

Description

Two-color plastic frame injection molding device

【Technical field】

The utility model relates to an injection molding device, in particular to a two-color plastic frame injection molding device capable of injection molding a two-color shell seat.

【Background technique】

As far as the shell seat used to install the light source and backlight module in the liquid crystal display (LCD) and reflect light, in order to achieve better optical performance, it is generally made of dark materials that can absorb light and adjust brightness. However, the dark housing will have dark shadows on the frame, which will easily lead to uneven brightness of the LCD. For this reason, manufacturers usually need to install white materials on the inner side of the frame to enhance light reflection and increase brightness.

At present, in the structural design of the general housing, most of the white reflective sheets are attached to the inner side of the frame by means of double-sided tape. It is labor-intensive and time-consuming, and if you are not careful, it is prone to defects such as skewing, wrinkles, or air bubbles. The product quality yield and production capacity are low, and the cost is relatively high.

In addition, some manufacturers mold and manufacture the two-color shell base through two independent mold devices. First, a reflective sheet is injection-molded in one of the mold devices, and then the reflective sheet is transferred to another mold device for injection molding again. A housing body combined with a reflection sheet to form a two-color housing by two injections. However, the above design must prepare two mold devices and a conveying device for conveying the reflective sheet between them, so the cost of equipment and molds is relatively high, and the manufacturing must go through two processes of mold closing, mold opening and conveying, so it is a waste of man-hours .

【Content of utility model】

The purpose of the utility model is to provide a two-color plastic frame injection molding device which can reduce the cost.

The two-color plastic frame injection molding device of the utility model can be used for sequential injection molding by a first-color injection molding machine and a second-color injection molding machine, and includes a mold unit, which includes a master mold and a The male mold is characterized in that the two-color plastic frame injection molding device also includes: at least one sliding unit mounted on the mold unit that can move laterally, a pushing unit, and a driving unit that drives the pushing unit at a first position and a second The driving unit that moves vertically between the two positions to relatively drive the sliding unit to move laterally. The sliding unit includes a movable mold that abuts on the male mold and the female mold to jointly define a mold cavity, and an inclined mold connected to the movable mold. The slider, the inclined slider has an inclined surface that is far away from the movable mold and extends obliquely, and the mold cavity has a pushing unit at the first position to drive the first gate formed by the boundary of the movable mold and connected to the first color injection molding machine , and a pushing unit at the second position drives the second gate formed by the moving mold and connected to the second color injection molding machine, the pushing unit includes a wedge-shaped block that can be moved vertically on one side of the sliding unit, The wedge block has a wedge face obliquely butted on the slope.

The beneficial effect of the utility model is that a sliding unit that can be pushed by the pushing unit to move laterally is installed on the mold unit, and the movement of the sliding unit can first limit and form a space connected to the first gate, and then limit to form a space connected to the second gate. The space of the mouth allows the first-color injection molding machine and the second-color injection molding machine to sequentially inject twice in the same mold to complete the two-color injection molding, so it can reduce costs and reduce process efficiency.

【Description of drawings】

Fig. 1 is a top view schematic diagram of a simple mechanism of a preferred embodiment of the two-color plastic frame injection molding device of the present invention;

Fig. 2 is a partial perspective exploded view of the preferred embodiment;

Fig. 3 is a schematic sectional view of the preferred embodiment;

Fig. 4 is an enlarged schematic cross-sectional view of a part of the preferred embodiment, illustrating a second position;

Figure 5 is a view similar to Figure 4, illustrating the bit in a first position;

Fig. 6 is a schematic diagram of a part of the top view of the preferred embodiment, illustrating the state in which several wedge blocks are relatively driven to move when a slide plate moves;

Fig. 7 is a partially enlarged schematic cross-sectional view of the preferred embodiment.

【Detailed ways】

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail:

As shown in Figure 1 and Figure 2, it is a preferred embodiment of the two-color plastic frame injection molding device of the present invention, which can be used for a first-color injection molding machine 1 and a second-color injection molding machine 2 to inject materials sequentially, to A double-color frame strip 3 is formed, and several frame strips 3 can be matched with plates to form a shell seat (not shown). The frame bar 3 has a dark body 31, and a light-color reflective layer 32 formed on an inner side of the body 31. In this embodiment, the body 31 is black, and the reflective layer 32 is white. As for the body 31 The color and the materials used for the main body 31 and the reflective layer 32 are not the focus of the present invention, so no detailed description will be given here.

As shown in FIG. 2 , FIG. 3 and FIG. 4 , the two-color plastic frame injection molding device includes: a mold unit 4 , two sliding units 5 , a pushing unit 6 , and a driving unit 7 .

The mold unit 4 includes a female mold 41 and a male mold 42 releasably closed on one side of the female mold 41 . The master mold 41 has two upper mold pockets 411 respectively formed on the bottom surface at intervals from left to right, a rail groove 412 that is depressed from the center of the top surface and extends longitudinally from front to back, and three spaced apart from each other and downward from the rail groove 412. penetrating to the through hole 413 on the bottom surface. The male mold 42 is installed under the female mold 41 and has two lower mold pockets 421 correspondingly formed below the upper mold pocket 411 of the female mold 41 . Of course, the male and female molds 41 and 42 can also be assembled by a plurality of plates in design, but because the detailed structure of the male mold 42 and the female mold 41 is not the key point of the present utility model, so it will not be described here.

These sliding units 5 are installed in the mold unit 4 at intervals from left to right, and can move relatively laterally. In the following description, it is located toward the center of the sliding units 5 as the inner side, and away from the center of the sliding units 5 as the outer side. Sliding unit 5 comprises a movable mold 51 adjacent to the inner side of the upper and lower mold sockets 411, 421, an inclined slider 52 connected to the outer side of the movable mold 51, and three intervals installed between the female mold 41 and the inclined slider. Elastic member 53 between 52. This movable mold 51 has an inner mold surface 511 facing the male and female molds 42 and 41, and the inner mold surface 511 of each movable mold 51 is in common with the upper mold pocket 411 of the female mold 41 and the lower mold pocket 421 of the male mold 42 A mold cavity 54 is defined. The mold cavity 54 has a first gate 541 connected to the injection molding machine 1 of the first color, and a second gate 542 adjacent to the inner mold surface 511 and capable of being connected to the injection molding machine 2 of the second color. The inclined slider 52 has a sloped portion 521 that is away from the movable mold 51 and extends inwardly from top to bottom, and three spaced apart grooves 522 that are respectively recessed from the top surface. The inclined portion 521 is in the shape of a dovetail groove with a wide inside and a narrow outside. The elastic member 53 is a compression spring accommodated in the cavity 522 , and has the elastic force to drive the inclined slider 52 and the moving mold 51 away from the mold cavity 54 .

The pushing unit 6 includes three wedge-shaped blocks 61 vertically movable between the sliding units 5 at intervals from left to right, and three channels vertically fixed on the wedge-shaped blocks 61 and movably extending upward through the female mold 41. The insertion rod 62 of hole 413, and the pin rod 63 that three left and right sides are inserted and fixed on the insertion rod 62. The wedge-shaped block 61 is a trapezoidal block with a wide top and a narrow bottom. Of course, it can also be a triangular block in design, and has a wedge surface 611 formed on the left and right sides and obliquely abutting on the inclined surface 521. The wedge surface 611 is in the shape of a dovetail block correspondingly embedded in the inclined portion 521 and capable of sliding relative to each other.

The driving unit 7 includes a hydraulic cylinder 71 fixedly installed on the rear side of the female mold 41 , and a slide plate 72 movably installed on the rail groove 412 of the female mold 41 . The hydraulic cylinder 71 is connected to drive the slide plate 72 to move laterally back and forth. The sliding plate 72 has three straight insertion holes 721 through which the insertion rods 62 of the pushing unit 6 respectively extend, and three sliding slots 722 transversely connected with the insertion holes 721 and extending obliquely relative to the insertion holes 721 . Each chute 722 is all inclined downwards gradually from the back to the front, and the pin rod 63 of the pushing unit 6 is stretched in the chute 722 and the insertion rod 62. When the hydraulic cylinder 71 drives the slide plate 72 to move laterally back and forth, The pin rod 63 can be limited by the chute 722 to drive the insertion rod 62 and the wedge block 61 to move vertically up and down (see FIG. 6 ).

In use, the driving unit 7 drives the pushing unit 6 to move vertically between a first position as shown in FIG. 5 and a second position as shown in FIG. 4 , so as to relatively drive the sliding unit 5 to move laterally. As shown by the solid line arrows in Figure 5 and Figure 6, driving the hydraulic cylinder 71 to drive the slide plate 72 to move backward can relatively drive the wedge-shaped block 61 to move straight down to the first position, and compress the elastic member 53, and at the same time Wedge block 61 also can promote inclined slide block 52 and movable mold 51 to move toward mold unit 4, makes movable mold 51 close second gate 542, and forms the mold that communicates with first gate 541 with male and female mold 42,41 closing. The cavity 54 is for the first color injection molding machine 1 to inject black molten plastic in the cavity 54, and after filling, pressure maintaining and cooling, the black body 31 of the frame bar 3 is formed.

As shown by the imaginary line arrows in Fig. 4 and Fig. 6, then, the hydraulic cylinder 71 is driven to drive the slide plate 72 to move forward, so that the wedge-shaped block 61 can be relatively driven to move upward and straight to the second position, and the elastic member 53 is released. , to drive the inclined slider 52 and the movable mold 51 to move towards the wedge block 61 with the reset elastic force of the elastic member 53, so that the movable mold 51 is slightly retreated from the mold cavity 54 for a certain distance, and the second gate 542 is connected to the movable mold 51 The secondary injection space 55 formed after retreating is used for the second color injection molding machine 2 to inject white molten plastic into the secondary injection space 55 toward the second gate 542 , and the white molten plastic is at high temperature and the inner surface of the black body 31 Fusion, during which a fusion interface is formed, and after the cooling process, a reflective layer 32 bonded to the main body 31 is formed. Finally, drive the first and second-color injection molding machines 1 and 2 to retreat, and drive the hydraulic cylinder 71 to drive the slide plate 72, return to the original position together with the push unit 6 and the slide unit 5, and then open the male and female molds 42 and 41 to Positioning to eject the formed two-color product.

In addition, as shown in Figure 2 and Figure 7, in order to limit the mold opening distance between the male and female molds 42 and 41, the utility model also installs a limit mechanism in the sliding unit 5, and each sliding unit 5 also It includes two limit screws 56 respectively installed in the inclined slider 52 and screwed to the female die 41 . The inclined sliding block 52 also has two through holes 523 through which the limiting screws 56 pass through. Each perforation 532 has a large slot portion 524 that communicates with the lower side, a small slot portion 525 that is connected to the upper side by the large slot portion 524 and has an aperture smaller than the large slot portion 524, and a small slot portion 525 formed in the large and small slots. The shoulder portion 526 between the slot portions 524 , 525 . Each limit screw 56 has a tail portion 561 screwed on the female mold 41, a body portion 562 extending downward from the tail portion 561 and passing through the small slot hole portion 525, and a body portion 562 away from the tail portion 561. One end radially protrudes from the head portion 563 located in the large slot portion 524 . When the male and female molds 42 , 41 are opened relative to each other, they will be separated from each other until the head 563 abuts against the shoulder 526 .

It should be further explained that the sliding unit 5 of the present utility model, the mold cavity 54 formed, and the number of wedge surfaces 611 that the wedge block 61 and the slope surface 521 of the push unit 6 are obliquely connected to can also be increased or decreased according to the design, such as only One group, or increased to three groups, four groups, so the number of settings is not limited to this embodiment. The number of the wedge block 61 , the insertion rod 62 and the pin rod 63 of the push unit 6 , and the number of the corresponding insertion holes 721 and slide grooves 722 on the slide plate 72 , of course, can also be increased or decreased according to the circumstances, and will not be described here. In addition, the location, quantity and structure of the elastic member 53 and the limit screw 56 installed in the sliding unit 5 can also be changed according to the design, and are not limited to this embodiment, and will not be described in detail.

It can be seen from the above description that the design of the two-color plastic frame injection molding device of the present invention can indeed be used for two injection moldings in the same mold, and only the driving unit 7 and the pushing unit 6 are used to drive the moving mold of the sliding unit 5. The 51 slide can be injected again to complete the two-color injection molding. The formed reflective layer 32 can be melted and bonded to the body 31 without falling off. The quality yield and production capacity of the finished product can be greatly improved, and the production cost can be reduced, and the processing process and processing time can be shortened. In addition, it can reduce the preparation of the mold, simplify the structure of the mold, and omit the transfer equipment, which can reduce the cost of equipment and molds, so it can improve market competitiveness. Therefore, the utility model has the effects of reducing costs, reducing manufacturing processes, and shortening working hours. Really can reach the purpose of the utility model, therefore, the utility model is not only an unprecedented innovation, but also available for industrial utilization.

Claims (10)

1. double color cement frame device for injection moulding, can be for one first look Jet forming machine and one second look Jet forming machine ejection formation in regular turn, and comprise a die unit, this die unit comprises a master mold, and male model, it is characterized in that: this double color cement frame device for injection moulding also comprises: at least one can laterally be installed in the sliding unit on this die unit movably, pass the unit for one, and one drive this pass unit between a primary importance and a second place directly to mobile driver element laterally to move relative to the drive sliding unit, this sliding unit comprises that one abuts against on male model and the master mold to define the mobile mould of a die cavity jointly, this moves the angled-lift splits of mould to reach a connection, this angled-lift splits has an inclined plane part away from the mobile mould and the extension of tilting, this die cavity has first cast gate that a passing unit in primary importance drives mobile mould institute's boundary formation and connects the first look Jet forming machine, reach second cast gate that a passing unit in the second place drives mobile mould institute's boundary formation and connects the second look Jet forming machine, this passing unit comprise one can be directly to the wedge that is installed in sliding unit one side movably, this wedge has an oblique wedge surface portion that is docked on this inclined plane part.

2. double color cement frame device for injection moulding as claimed in claim 1 is characterized in that: this sliding unit comprises that also at least one is installed in the elastic component between master mold and angled-lift splits.

3. double color cement frame device for injection moulding as claimed in claim 2 is characterized in that: this elastic component is a compression spring, and this passing unit can compress this elastic component when primary importance, and this passing unit can discharge this elastic component when the second place.

4. as claim 1,2 or 3 described double color cement frame device for injection moulding, it is characterized in that: this sliding unit comprises that also one is installed in the angled-lift splits and is fixed at master mold leaves master mold with the restriction male model limited screw.

5. double color cement frame device for injection moulding as claimed in claim 4, it is characterized in that: this angled-lift splits has a perforation that supplies limited screw to stretch through, this perforation has a big slotted eye portion that is communicated with contiguous male model one side, one is communicated to the sulculus hole portion that is smaller than big slotted eye portion away from male model one side and aperture by big slotted eye portion, reaching one is formed on big, shoulder between the portion of sulculus hole, this limited screw has an afterbody that is fixed at this master mold, one is extended and the body portion of the too small slotted eye portion that stretches through toward male model by afterbody, and one by body portion away from radially protruding expansion of an end of afterbody and position the head in big slotted eye portion.

6. as claim 1,2 or 3 described double color cement frame device for injection moulding, it is characterized in that: this sliding unit comprises that also several are installed in the angled-lift splits respectively and are fixed at master mold leaves master mold with the restriction male model limited screw.

7. double color cement frame device for injection moulding as claimed in claim 6, it is characterized in that: the perforation that this angled-lift splits has several each intervals and stretches through for limited screw respectively, each perforation has a big slotted eye portion that is communicated to contiguous male model one side, one is communicated to the sulculus hole portion that is smaller than big slotted eye portion away from male model one side and aperture by big slotted eye portion, reaching one is formed on big, shoulder between the portion of sulculus hole, each limited screw has an afterbody that is fixed at this master mold, one is extended and the body portion of the too small slotted eye portion that stretches through toward male model by afterbody, and one by body portion away from radially protruding expansion of an end of afterbody and position the head in big slotted eye portion.

8. double color cement frame device for injection moulding as claimed in claim 1 is characterized in that: the inclined plane part of this angled-lift splits is the dovetail groove shape of inner wide and outer narrow, and the wedge surface portion of this wedge is the dovetail bulk that correspondence is embedded at inclined plane part and the relative slippage of energy.

9. double color cement frame device for injection moulding as claimed in claim 1 is characterized in that: this driver element comprises that drives the oil hydraulic cylinder that wedge moves.

10. double color cement frame device for injection moulding as claimed in claim 9, it is characterized in that: the slide plate that this driver element comprises also that a slice can laterally be installed on the master mold movably and driven by oil hydraulic cylinder, this slide plate has one directly to jack, the chute that reaches a cross connection jack and tilt to extend with respect to jack, and this passing unit also comprise one straight on being fixed on wedge and the master mold and be plugged on inserted link in the jack of stretching through out movably, and crosswise fixed is on the inserted link and the pin rod in this chute of stretching through movably.

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