TWI449617B - Mold structure and molding system - Google Patents

Description

Mold structure and mold system

The invention relates to a mold system and a die structure thereof; in particular to a mold system provided with a slider guiding groove and a die structure thereof.

1A and 1B are respectively a top view and a perspective view of a conventional injection molding system 10. As shown in FIGS. 1A and 1B, the conventional injection molding system includes a flow path block 20, a plurality of sliders 30, a plurality of pressure blocks 31, a pressing block 32, and a mold core 40. In addition, the conventional injection molding system 10 shown in Fig. 1 is used to form a light guide plate for use in a display.

When the injection molding is performed, the pressing block 32 will press the slider 30 downward, and by the friction and interference between the slider 30 and the pressing block 32, the slider 30 is pushed toward the mold core 40. The pocket 50 is formed between the slider 30 and the mold core 40 and the groove 50 corresponds to a predetermined shape of the light guide plate. The plastic material of the light guide plate will be injected into the cavity 50 from the pouring channel 21 of the flow path block 20 in a liquid form after the formation of the cavity 50, and collected above the mold core 40. Since the pocket 50 is formed according to a predetermined pattern of the light guide plate, the plastic material will have a predetermined shape of the light guide plate after solidification.

The pressure block 31 of the conventional injection molding system 10 is used to limit the range of movement of the slider and to maintain the stability of the movement of the slider 30 to ensure that the shape of the product formed by the slider 30 conforms to design standards. As shown in Fig. 1, the pressure block 31 is used to limit the displacement of the slider in the lateral direction to ensure that the slider 30 moves in a linear direction.

However, the above conventional injection molding system has a plurality of problems. First, when performing injection molding, the slider 30 will need to be first assembled on a mold base. When the slider 30 has a size difference or other need to replace the slider, the slider 30 will need to be disassembled from the mold base. And replace a slider 30 again. The action of disassembling and assembling the slider 30 to the die holder will inevitably increase the time required for injection molding and cause waste in working hours.

Further, the size of the compact 31 corresponds to the width of one end of the slider 30, since the slider 30 generally has a fixed width. In order to effectively limit the displacement of the slider 30 in the lateral direction, the compact 31 needs to have a width equal to that of the slider 30. As such, the clamp 31 will limit the likelihood and freedom of the flow passage block 20 to be reduced. Since the amount of waste generated by the conventional injection molding system 10 is positively correlated with the size of the flow path block 20. Therefore, the compact 31 limits the range in which the amount of waste is generated while limiting the narrowing of the flow path block 20.

2 is a schematic cross-sectional view of the slider 30 and the pressing block 31 shown in FIGS. 1A and 1B. As shown in FIG. 2, the slider 30 and the pressing block 31 have corresponding first lugs 34 and second lugs 33, wherein the slider 30 and the pressing block 31 are transmitted through the first lugs 34 and the second lugs. 33 interferes with each other and thereby limits the lateral displacement of the slider 30. The design of the first lug 34 and the second lug 33 described above will increase the manufacturing cost of the slider 30 and the compact 31.

In summary, the waste of the work of the slider 30 due to the installation and the waste of materials due to the use of the pressure block 31 are one of the important issues in the current injection molding of products. It can be seen that how to omit the use of the pressure block 31 while changing the structure of the slider 30 is an important subject of current product injection molding.

It is an object of the present invention to provide a mold system and die structure for reducing mold waste generation.

Another object of the present invention is to provide a mold system and a mold structure for reducing the pressure of the mold plastic injection.

The mold structure of the present invention comprises a slider body, a fixing block and a positioning unit, wherein the slider system is disposed above the fixing block. The fixing block has a guiding groove corresponding to the bottom surface of the slider body. The slider body has a first slope, wherein the pressing block also has a second slope corresponding to the first slope. The second bevel of the pressing block contacts the first bevel when the slider body is away from the die and simultaneously presses the bevel toward the fixed block. In this way, the pressing block can be pressed to move along the guiding groove and limit the displacement of the slider body.

The positioning unit includes a positioning block and a positioning member, wherein the positioning block is disposed in the guiding slot. In addition, the positioning block includes a through hole for the positioning member to pass through the through hole and is connected to the positioning hole of the bottom surface of the slider body. In various embodiments, the positioning unit may further include a spacer disposed between the positioning block and the positioning member, wherein the radius of the spacer is preferably greater than a width of the guiding slot and a portion of the fixing block located beside the guiding slot.

Since the positioning unit is connected to the slider body through the guiding groove of the fixing block, the slider body does not need to be mounted on the mold base of the mold system. In this way, when the test is performed, the slider body only needs to be assembled separately to the positioning unit without increasing the cycle of the molding process by repeatedly disassembling the mold base.

3 is a perspective view of a mold system 100 of the present invention, wherein the mold system 100 of the present embodiment is used for performing injection molding of a plate type or film optical element such as a light guide plate, but is not limited thereto, and the mold system 100 of the present invention is used. It can also be used for injection molding of other products.

As shown in FIG. 3, the mold system 100 includes a flow block 200, a plurality of mold structures 300, a mold core 400, and a pocket 500. In this embodiment, a pair of mold structures 300 are disposed on the side of the flow path block 200, wherein the mold structure 300 includes at least the slider body 310 and the fixed block 330. In an embodiment, the mold structure 300 can further include a pressing block 320.

When performing the injection molding of the light guide plate, the pressing block 320 will move downward through the driving system (not shown) and contact the slider body 310. After pressing the block 320, the slider body 310 is moved on the fixed block 330 by the friction and interference with the slider body 310 and pushed toward the die 400 and the groove 500 is formed on the slider body 310 and the die. Between the 400 and the flow block 200. In the embodiment, the transmission system is a servo motor (Servo Motor), wherein the servo motor is connected to the pressing block 320 and simultaneously the traction pressing block 320 moves upward or pushes the pressing block 320 downward, but is not limited thereto. In various embodiments, the transmission system also includes a single-phase induction motor, a three-phase induction motor, or other transmission system that utilizes the hydraulic principle.

The flow block 200 includes a plurality of runners 210, such as the X-direction runner 210 and the Y-direction runner 210 shown in FIG. 3, wherein each runner 210 is located on the side of the runner block 200 and is different from each other. The slots 500 are connected. The mold system 100 may further include an additional slider body 310, a pressing block 320 and a fixing block 330 to respectively correspond to different sprue channels 210, for example, the position of the sprue channel 210 disposed in the Y direction shown in FIG. 3; However, in order to more clearly express the relationship between the slot 500 and the slot 500 and other components, the slider body 310, the pressing block 320, the fixing block 330, and the mold core in the Y direction are not shown in FIG. 400 and the tank 500.

The liquid plastic material will collect in the cavity 500 and eventually solidify due to the temperature drop. The cavity 500 of the embodiment has a predetermined shape of the light guide plate, so that the plastic material will have a predetermined shape of the light guide plate after solidification, but is not limited thereto; in different embodiments, the shape of the cavity 500 can be changed by changing the slider The shape of the body 310 or the mold core 400 is adjusted. In other words, the pocket 500 can have the shape of other plate or film-like optical elements by adjusting the shape of the slider body 310 or the mold core 400. In addition, since the slider body 310 surrounds the mold core 400 very closely, liquid cannot penetrate between the slider body 310 and the mold core 400. In this way, the mold system 100 can prevent the liquid plastic material from leaking out of the cavity 500 by the tight space formed by the slider body 310.

During the injection molding of the light guide plate, the plastic material flows out from the pouring channel 210 of the flow path block 200 in a liquid state and finally collects in the cavity 500 between the mold structure 300 and the flow path block 200. The slider body 310 is movable in the direction of the pressing block 320 to be separated from the formed light guide plate for the user to manually or automatically mechanically detach the light guide plate from the mold core 400.

4 and 5 are respectively an exploded view and a combined sectional view of the mold structure 300 shown in FIG. As shown in FIGS. 4 and 5 , the mold structure 300 includes a slider body 310 , a fixed block 330 , and a positioning unit 340 . The slider body 310 is disposed on the fixing block 330, wherein the bottom surface of the slider body 310 is in sliding contact with the fixing block 330. The positioning unit 340 of the present invention passes through the guiding groove 331 of the fixing block 330 and is connected to the slider body 310 to simultaneously limit the slider body 310 to The guide groove 331 performs a linear movement.

In addition, in order to reduce wear of the slider body 310 and the fixing block 330 due to friction, at least a portion of the fixing block 330 is preferably made of a wear resistant material. In the embodiment shown in FIGS. 4 and 5, the fixing block 330 includes a friction portion 332 made of a wear resistant material, wherein the friction portion 332 is a portion of the fixing block 330 for making contact with the slider body 310. In other words, the friction portion 332 is disposed on the surface of the fixed block 330 relative to the slider body 310 to avoid material wear caused by the movement of the slider body 310.

As shown in FIG. 4 and FIG. 5, the slider body 310 and the fixing block 330 respectively have corresponding positioning holes 312 and guiding grooves 331. The positioning holes 312 are formed on the bottom surface 311 of the slider body 310 and face the fixing block. 330. In the present embodiment, the guiding slot 331 is a through opening that penetrates the fixing block 330. The positioning unit 340 passes through the guiding slot 331 with respect to the bottom surface 311 of the slider body 310 and is simultaneously connected to the slider body 310. Positioning hole 312. In this way, the slider body 310 can move the slider body 310 on the upper surface of the fixing block 330 by the corresponding design of the positioning unit 340 through the transmission system. That is, when the mold structure includes the pressing block 320, the transmission system can move the slider body 310 relative to the fixed block 330 by the corresponding design of the positioning unit 340 through the pressing block 320; when the mold structure does not contain the pressing block At 320 o'clock, the transmission system can directly drive the slider body 310 such that the slider body 310 moves relative to the fixed block 330 by the corresponding design of the positioning unit 340. In addition, since the positioning unit 340 is engaged with the guiding slot 331 , the maximum moving range of the positioning unit 310 corresponds to the length of the guiding slot 331 . In addition, the extending direction of the guiding groove 331 is parallel to the moving direction of the slider body 310. In this way, the guiding groove 331 can restrict the displacement of the slider body 310 in other directions while guiding the slider body 310 to move.

As shown in FIG. 4 and FIG. 5 , the positioning unit 340 includes a positioning block 341 and a positioning member 342 , wherein the positioning block 341 is disposed in the guiding slot 331 of the fixing block 330 , and the positioning block 341 has a through-the-hole through the positioning block 341 . Hole 346. The positioning member 342 is disposed through the through hole 346 and is simultaneously connected to the positioning hole 312 of the slider body 310 for driving the slider body 310 to move. The positioning member 342 includes the first One end 343 and a second end 344, wherein the first end 343 is located at one of the smaller diameter ends of the positioning member 342. The first end 343 of the positioning member 342 having a smaller diameter passes through the through hole 346 of the positioning block 341 and is connected to the positioning hole 312 on the bottom surface of the slider body 310. In other words, the first end 343 of the positioning member 342 is coupled to the positioning hole 312 on the bottom surface of the slider body 310. In addition, since the second end has a larger size than the through hole of the positioning block 341, the second end 344 will not pass through the through hole 346 to form a flange such that the flange contacts the surface of the fixed block 330 to interfere with each other. In other words, the second end 344 can be used to maintain the distance between the positioning member 342 and the positioning block 341 and to increase the stability of the connection between the positioning unit 340 and the slider body 310.

In the embodiment shown in FIG. 4 and FIG. 5, one of the smaller diameters of the positioning member 342 is a cylinder having a flat surface, but is not limited thereto; in different embodiments, the positioning member 342 may also be fixed by bolts or the like. The component, wherein the thread of the corresponding bolt can be formed on the surface of the positioning block 341 through hole 346 and the positioning hole 312 to increase the fixing force between the positioning member 342 and the positioning block 341 and the slider body 310.

As shown in FIG. 4 and FIG. 5, the slider body 310 further includes a groove 313 formed on the bottom surface 311, wherein the position of the groove 313 corresponds to the position of the guiding block 331 of the fixing block 330. The positioning block 341 of the embodiment extends into the groove 313 while passing through the guiding groove 331. The positioning block 341 and the guiding groove 331 and the groove 313 preferably have corresponding section widths. Because the groove 313 and the positioning block 341 are identical in size, the slider body 310 can be prevented from moving in a direction perpendicular to the guiding slot 331 by the groove 313, and at the same time restricting the slider body 310 from rotating relative to the fixing block 330. .

6 is a cross-sectional view of the mold shown in FIGS. 4 and 5, and reference is made to the mold system 100 shown in FIG. As shown in FIG. 6, the slider body 310 has a first slope 314, wherein the pressing block 320 also has a second slope 321 corresponding to the first slope 314. The second bevel 321 of the pressing block 320 contacts the first bevel 314 when the slider body 310 is away from the die 400 and simultaneously presses the first bevel 314 in a direction toward the fixed block 330. In this way, the pressing block 320 can press the slider body 310 to move along the guiding groove 331 toward the mold core 400 and restrict the displacement of the slider body 310 toward the direction away from the mold core 400.

Figure 7 shows another embodiment of the mold structure 300 shown in Figures 4 and 5. In the present embodiment, the mold structure 300 further includes a mold base 600, wherein the fixed block 330 is disposed on the mold base 600. As shown in FIG. 7, the fixing block 330 is substantially located between the die holder 600 and the slider body 310. The die holder 600 includes a die holder opening 610 for the positioning member 342 of the positioning unit 340 to pass through and be connected to the slider. The body 310. In the present embodiment, the die holder opening 610 of the die holder 600 corresponds to the guiding groove 331 of the fixing block 330. In addition, the die holder 600 defines a receiving groove 620 on the surface of the fixing block 330 for receiving the fixing block 330, that is, the fixing block 330 is received in the receiving groove 620 away from one side of the slider body 310. In this way, the fixing block 330 is fixed in the receiving groove 620. In this embodiment, the width of the second end 344 is greater than the width of the die holder opening 610. Therefore, the second end 344 of the positioning member 342 substantially contacts the surface of the die holder 600 away from the slider body 310 and is disposed on the slider body. 310 moves in phase interference.

As shown in FIG. 7 , the positioning unit 340 of the present embodiment is connected to the positioning hole 312 of the slider body 310 through the die holder 600 and through the guiding groove 331 of the fixing block 330 . The slider body 310 only needs to be connected to the positioning unit 340 without being combined with the mold base 600. Therefore, even if the slider body 310 needs to be replaced due to size or other reasons, the user only needs to position the slider body 310 from the positioning unit 340. The separation can be replaced without removing the slider body 310 from the die holder 600. In this way, the above design can save the labor and corresponding cost of detaching the slider body 310 from the die holder 600 by a simple connection between the slider body 310 and the positioning unit 340.

In the embodiment shown in FIG. 4 and FIG. 5, the positioning unit 340 includes only the positioning block 341 and the positioning member 342, but is not limited thereto. In the embodiment shown in FIG. 8 and FIG. 9 , the positioning unit 340 further includes a spacer 345 disposed between the positioning block 341 and the positioning member 342 , wherein the spacer 345 is used to maintain the second end 344 of the positioning member 342 . The distance from the positioning block 341 is to enhance the stability of the positioning unit 340 as a whole. In order to maintain stability between the positioning unit 340 and the slider body 310 and the fixing block 330, the radius of the spacer 345 is greater than the width of the guiding groove 331. As a result, the spacer 345 will not penetrate the guiding groove 331 and thereby maintain the positioning member The distance between the second end 344 of the 342 and the fixed block 330.

In addition, in addition to maintaining the distance between the second end 344 of the positioning member 342 and the positioning block 341, the surface of the positioning member 342 and the spacer 345 of the embodiment may be provided with corresponding threads for the spacer 345 to position the positioning member 342. Fixed at a certain position. As such, the spacer 345 can limit the displacement of the positioning member 342 perpendicular to the direction of the opening of the guiding slot 331.

While the foregoing description of the preferred embodiments of the invention, the embodiments of the invention The spirit and scope of the principles of the invention. Modifications of the various forms, structures, arrangements, ratios, materials, components and components may be employed by those skilled in the art. Therefore, the embodiments disclosed herein are to be considered as illustrative and not restrictive. The scope of the present invention is defined by the scope of the appended claims, and the legal equivalents thereof are not limited to the foregoing description.

100‧‧‧Mold system

200‧‧‧Channel block

210‧‧‧Watering runner

300‧‧‧Mold structure

310‧‧‧ slider body

311‧‧‧ bottom

312‧‧‧Positioning holes

313‧‧‧ trench

314‧‧‧ first slope

320‧‧‧Forcing block

321‧‧‧second slope

330‧‧‧Fixed block

331‧‧‧ guiding slot

332‧‧‧Abrasion Department

340‧‧‧ Positioning unit

341‧‧‧ Positioning block

342‧‧‧ positioning parts

343‧‧‧ first end

344‧‧‧ second end

345‧‧‧shims

346‧‧‧through holes

400‧‧‧Men

500‧‧‧ slots

600‧‧‧ mold base

610‧‧‧ mold base opening

620‧‧‧ accommodating slot

1A and 1B are respectively a top view and a perspective view of a conventional injection molding system; FIG. 2 is a schematic cross-sectional view of the slider and the pressure block shown in FIG. 1; FIG. 3 is a mold system of the present invention. 3 is a perspective view of the mold structure shown in FIG. 3; FIG. 5 is a combined sectional view of the mold structure shown in FIG. 3; and FIG. 6 is a mold shown in FIG. 4 and FIG. Another cross-sectional view; FIG. 7 is a modified embodiment of the mold structure shown in FIGS. 4 and 5; and FIGS. 8 and 9 are another embodiment of the mold structure shown in FIGS. 4 and 5.

300‧‧‧Mold structure

310‧‧‧ slider body

311‧‧‧ bottom

313‧‧‧ trench

330‧‧‧Fixed block

331‧‧‧ guiding slot

332‧‧‧Abrasion Department

340‧‧‧ Positioning unit

341‧‧‧ Positioning block

342‧‧‧ positioning parts

343‧‧‧ first end

344‧‧‧ second end

346‧‧‧through holes

Claims (10)

A mold system comprising: at least one mold structure, each mold structure comprising: a slider body having a bottom surface; a fixing block disposed corresponding to the bottom surface of the slider body, the fixing block having a guiding groove facing the The bottom surface of the slider body is disposed; and a positioning unit passes through the guiding slot and is coupled to the slider body, wherein the positioning unit is restricted to slide by the guiding slot and connects the slider body to the fixing Moving on the block; and a mold core corresponding to one end of the guiding groove; wherein the slider body is limited to the positioning unit moving along the guiding groove to approach or away from the mold core. The mold system of claim 1, wherein the positioning unit comprises: a positioning block disposed in the guiding groove; wherein the positioning block is formed with a continuous perforation; a positioning member passes through the through hole The first end of the positioning member is connected to the bottom surface of the slider body, and the second end is formed with a flange that interferes with the positioning block. The mold system of claim 2, wherein the positioning unit comprises a spacer disposed between the positioning block and the flange of the positioning member, the radius of the spacer being greater than the width of the guiding slot, And contradicting the portion of the fixed block adjacent to the guiding slot. The mold system of claim 3, wherein the slider body further comprises a positioning hole corresponding to the guiding slot, and the first end of the positioning component is coupled to the positioning hole. The mold system of claim 2, wherein a groove is formed on the bottom surface of the slider body, and the positioning block protrudes into the groove and has a corresponding sectional shape with the groove. The mold system of claim 5, wherein the groove length is greater than the length of the guide groove. The mold system of claim 1, wherein the fixing block comprises a wear resistant material disposed on a surface contacting the slider body. The mold system of claim 7, wherein the mold structure further comprises a pressing block, wherein a face of the slider body facing away from the mold core is formed as a slope of the outer slope, and the pressing block is selectively oriented toward The fixed block direction presses the slope. The mold system of claim 1, wherein the mold structure further comprises a mold base, the fixing block is disposed on the mold base; wherein the mold base forms a receiving groove, the fixing block is away from the mold One side of the slider body is received in the receiving groove. The mold system of claim 1, further comprising: a first-class channel having a plurality of runners; and a plurality of slots respectively adjoining the channel block and communicating with any of the runners Wherein the at least one mold structure comprises a plurality of mold structures disposed on opposite sides of the plurality of slots of the plurality of slots and in contact with one side of the flow block.