CN101513765A - Injection mold with cutting structure - Google Patents

Abstract

The invention relates to an injection mold with a cutting structure, which is used for cutting a film positioned in the mold and is characterized by comprising the following components: a first module; a second module which can be opened and closed relative to the first module; and the cutting edge piece is arranged on one module, the other module is used for arranging the film therein, the first module and the second module are closed, and the film is abutted against the cutting edge piece. Therefore, the cutting edge piece can perform precise cutting treatment on the film in the die in advance, so that the precision of a finished product can be improved, the labor, time and equipment cost can be reduced, and the production efficiency is improved.

Description

Injection mold with cutting structure

technical field

The invention relates to a mold, in particular to an injection mold with a cutting structure.

Background technique

In order to pursue the high precision and high quality of plastic parts, traditional plastic processing technology can no longer meet the needs of the times, so various surface decoration processes have emerged accordingly. The common process is to put a decorative film into the mold, and after the mold is closed, Plastic injection is carried out to combine the plastic and the film to form, so that the surface of the finished product after demoulding is covered with a decorative film, thereby improving the aesthetics and practicability of the finished product.

However, because the film needs to be heated and formed in the mold, large burrs are reserved around the film to absorb the shrinkage of the film after three-dimensional forming and heating. The traditional finished product 1 after demoulding is shown in Figure 1 , there is still a large film burr 2 on its peripheral edge 1a, and the subsequent burr 2 cutting and trimming procedures are required to achieve the required aesthetics and integrity of the product. However, the subsequent film burr 2 cutting operation must be manually cut Or cut by a punching device, so it will cause troubles for reprocessing, and the operation is time-consuming and labor-intensive, which not only increases the cost of manpower, time and equipment, but also the production efficiency is not high. Moreover, the film around the finished product 1 After the raw edge 2 is processed by the above-mentioned traditional cutting process, it is still prone to unevenness, which further affects the overall aesthetics and delicacy of the finished product 1, resulting in a reduction in the economic value of the finished product 1 . In addition, in the usual injection molding process, there are occasional overflows, resulting in unsightly finished products.

Contents of the invention

In view of the above problems, the main purpose of the present invention is to provide an injection mold with a cutting structure, which can produce high-precision finished products covered with a decorative film on the surface, reduce manpower, time and equipment costs, and improve production efficiency .

In order to achieve the above object, the present invention provides an injection mold with a cutting structure, which is used for cutting a film located in the mold, and is characterized in that it includes: a first module; a second module, which It can be opened and closed relative to the first module; the cutting blade is set on one of the modules, and the other module is set in the film, and the first and second modules are closed, and the film and the cutting The blades collide.

In the above-mentioned technical solution of the present invention, the first module has a mold core, the second module has a mold cavity matching the mold core, and the mold core and the mold cavity are jointly surrounded to form a cavity , the cavity of the second module is used for setting the film, and the film corresponds to the cavity, and the cutting blade is arranged on the periphery of the core of the first module.

In the above-mentioned technical solution of the present invention, when the first and second modules are closed, the cutting blade is located in the cavity and is adjacent to the inner wall of the cavity of the second module.

In the above-mentioned technical solution of the present invention, the cutting blade has a blade protruding out of the core of the first module.

In the above-mentioned technical solution of the present invention, a sipe is provided on the periphery of the mold cavity of the second module, and when the first and second modules are closed, the edge of the cutting blade protrudes into the sipe.

In the above-mentioned technical solution of the present invention, the length of the cutting edge part is greater than the thickness of the film.

In the above-mentioned technical solution of the present invention, the length of the cutting edge part is equal to the thickness of the film.

In the above-mentioned technical solution of the present invention, the length of the cutting edge part is smaller than the thickness of the film.

In the above-mentioned technical solution of the present invention, the side wall surface of the blade portion close to the mold cavity is aligned with the inner wall surface of the mold cavity of the second module.

In the above-mentioned technical solution of the present invention, the cutting blade is integrally formed on the periphery of the core of the first module.

By adopting the above-mentioned technical scheme, the present invention uses cutting blades to pre-cut the thin film inside the mold, which can save the follow-up burr cutting operation after the traditional finished product is demoulded. In this way, it can not only improve the precision of the finished product, but also reduce the Reduce manpower, time and equipment costs, improve production efficiency.

Description of drawings

Fig. 1 is the schematic diagram of the demoulding product that conventional surface is covered with film;

Fig. 2 is a side view structural representation of a preferred embodiment of the present invention;

Fig. 3 discloses the three-dimensional combined schematic diagram of the first module and the cutting blade of the above-mentioned preferred embodiment;

Fig. 4 discloses that the mold of the above-mentioned preferred embodiment is in conflict with the film when the mold is closed;

Fig. 5 is a partial enlarged view of Fig. 4;

Fig. 6 to Fig. 8 are the action flow charts of the mold of the above-mentioned preferred embodiment during mold clamping and injection, revealing the cutting blade cutting film;

Fig. 9 is the demoulding finished product that utilizes the mold of above-mentioned preferred embodiment to make;

Fig. 10 is similar to Fig. 8, revealing that the film is not completely cut off by the cutting blade;

Figure 11 reveals the film morphology of another demolded finished product.

Detailed ways

The structure, characteristics and effects of the present invention will be described in detail by citing the following embodiments in conjunction with the accompanying drawings.

First, as shown in Fig. 2 and Fig. 3, it is an injection mold 100 with a cutting structure provided by a preferred embodiment of the present invention. The mold 100 includes a first module 10, a second module 20 and a cutting blade. 30. The mold 100 is used in the in-mold film bonding process, so that the film F can be pre-cut beforehand inside the mold 100. The structure of the mold 100 in this embodiment is now described in detail as follows:

As shown in Figures 2 to 5, the first module 10 in this embodiment is connected to an injection machine (not shown in the figure), which has a parting surface 11 and a mold core protruding from the parting surface 11. 12. An annular slot 121 is provided around the periphery of the mold core 12. In addition, an injection channel 10a is provided in the center of the first module 10 for injecting the plastic of the injection machine into the mold 100.

The second module 20 can be opened and closed relative to the first module 10 , and has a mold cavity 22 shaped to fit the mold core 12 , and a knife groove 22 a formed on the periphery of the mold cavity 22 (as shown in FIG. 6 ). When the first and second modules 10 and 20 are closed, the mold core 12 and the mold cavity 22 together form a cavity 101, and the film F can be placed into the cavity 22 in any known conventional way and fixed in the corresponding cavity 101 position. In this embodiment, the film F is clamped by a clamping member 23 (as shown in FIG. 2 ) which is arranged on the second module 20 and can reciprocate relative to the second module 20 (as shown in FIG. 2 ). The key point is not to repeat.

The cutting blade 30 is an annular frame in this embodiment, one end of which is fastened to the annular groove 121 on the periphery of the mold core 12 of the first module 10, and the other end protrudes out of the mold core 12 to form a blade portion 31 , in this embodiment, the length of the blade 31 is greater than the thickness of the film F, and its front end forms an inclined end 311, and the height of the inclined end 311 near the cavity 101 is smaller than the height of the side away from the cavity 101. When the first and second modules 10 and 20 are closed, the cutting blade 30 is located in the cavity 101 and is adjacent to the inner wall surface 221 of the mold cavity 22 of the second module 20 , and its blade 31 extends into the knife groove of the mold cavity 22 22a, so as to completely cut off the film F, and the side wall surface of the blade portion 31 close to the cavity 101 is aligned with the inner wall surface 221 of the cavity 22 of the second module 20 .

It should be noted that the card slot 121 of the first module 10 is not a necessary component and can be omitted. In other words, the cutting edge part 30 can be integrally formed on the periphery of the mold core 12 of the first module 10 instead. In addition, the cutting blade part 30 can also be movable, that is, the operator can replace the cutting blade part 30 with an appropriate length according to the thickness of the film F, or the cutting blade part 30 can be adjusted by fine adjustment of an adjustment mechanism (not shown). Displacement is generated to change the length of the blade portion 31, so that it can be used with films of different thicknesses. Moreover, the shape of the cutting blade member 30 is not limited to the above-mentioned annular frame.

The above is the description of the components of the mold 100 and their relative positions in this embodiment, and then describes its application in the in-mold film bonding process and its effects and advantages:

As shown in Figure 2, when the first and second modules 10 and 20 are in the open state, the film F is first placed into the mold 100 by a clamping device 200, and then clamped and positioned by the clamping member 23, so that the periphery of the film F is Clamped and tightened, after the clamping member 23 clamps the film F, the clamping device 200 releases the film F and exits to the outside of the mold 100, and then, the film F is heated and stretched and is attracted by vacuum to be tightly attached to the mold cavity 22 Wall surface 221 . Next, as shown in the action flowcharts of Fig. 4, Fig. 5 and Fig. 6 to Fig. 8, when the first and second modules 10, 20 are operated and closed, the film F collides with the cutting edge member 30 and is cut. Note that, in this embodiment, since the length of the blade portion 31 of the cutting blade member 30 is greater than the thickness of the film F, the film F can be completely cut off, that is, the burrs can be removed along the way. Of course, the operator can also use the cutting blade 30 whose blade length is equal to the film F, so that the same purpose can be achieved, and the knife groove 22a of the mold cavity 22 can also be omitted. After cutting the film F, the plastic S enters along the injection channel 10a of the first module 10, and is combined with the film F to be molded in the cavity 101. Finally, the mold opening operation is carried out. The first and second modules 10, 20 Relatively opened, the finished product 300 as shown in Figure 9 can be obtained. It should be noted that since the burrs of the film F have been removed in advance, the peripheral edge 301 of the finished product 300 has no film burrs, so no secondary processing is required. High precision and high aesthetic appearance structure can be obtained.

Of course, the length of the blade portion 31 of the cutting blade member 30 can also be less than the thickness of the film F, as shown in FIG. The inclined end 311 of the blade portion 31 may also be higher on the side close to the cavity 101 than on the side away from the cavity 101 , so that the purpose of preventing overflow can also be achieved. It can be seen from the above structure that after the mold is closed, the film F is not completely cut, so after injection molding, the finished product 400 as shown in Figure 11 can be obtained. Since the film F has been appropriately cut in advance, the operator only needs to cut the finished product 400 The film F on the peripheral edge 401 can be removed with a little force, and a product with high precision and high appearance can also be obtained.

It is also worth mentioning that the design of the blade 31 with the inclined end 311 of the present invention can not only achieve a better cutting effect, but also block the plastic in the cavity 101 of the mold 100 when the plastic is injected to avoid the occurrence of The overflow situation in the prior art is used to improve the delicacy and aesthetics of the finished product. Furthermore, since the side wall surface of the blade portion 31 close to the cavity 101 is aligned with the inner wall surface 221 of the mold cavity 22 of the second module 20, the precision of cutting can be further improved to improve the delicacy and appearance of the finished product. Spend.

In summary, the present invention directly utilizes the cutting blade 30 in the mold 100 to pre-cut the film F, so that it is easier to remove the burrs of the film F around the finished product 300 after forming, or use the cutting edge 31 to compare the film F The long-thickness cutting edge of F directly removes the burrs when the mold 100 is clamped. In this way, compared with those who use it, the design of the cutting edge of the present invention can greatly reduce or save the follow-up process of the conventional decorative film. The secondary processing cost caused by the raw edge cutting operation can save a lot of manpower, time and equipment costs, and the production efficiency is high, and there will be no unevenness of the film raw edges around the conventional finished product after trimming. Therefore, the finished product made by using the mold of the present invention has high delicacy and aesthetics, and has high commercial benefits and added value.

The above description is only a preferred feasible embodiment of the present invention, and all equivalent structural changes made by using the description, claims and drawings of the present invention should be included in the scope of patent protection of the present invention.

Claims (10)

1. An injection mold with a cutting structure for cutting a film positioned in the mold, characterized in that it comprises: a first module; a second module, which can be opened and closed relative to the first module; The cutting blade is arranged on one of the modules, and the other module is for the film to be set therein, the first and second modules are closed, and the film is in contact with the cutting blade. 2. The injection mold with cutting structure according to claim 1, characterized in that: said first module has a mold core, said second module has a mold cavity matching said mold core, said The mold core and the mold cavity are jointly arranged to form a cavity, the cavity of the second module is used for setting the film, and the film corresponds to the cavity, and the cutting blade is arranged on the cavity. The periphery of the mold core of the first module. 3. The injection mold with a cutting structure according to claim 2, wherein when the first and second modules are closed, the cutting blade is located in the cavity and is adjacent to the second module. The inner wall of the mold cavity of the second module. 4. The injection mold with a cutting structure as claimed in claim 2, wherein the cutting blade has a blade protruding out of the core of the first module. 5. The injection mold with cutting structure according to claim 4, characterized in that: the periphery of the mold cavity of the second module is provided with a sipe, when the first and second modules are closed, the The edge portion of the cutting edge piece extends into the knife groove. 6. The injection mold with cutting structure according to claim 4, characterized in that the length of the cutting edge part is longer than the thickness of the film. 7. The injection mold with cutting structure according to claim 4, characterized in that: the length of the cutting edge part is equal to the thickness of the film. 8. The injection mold with a cutting structure as claimed in claim 4, wherein the length of the cutting edge part is smaller than the thickness of the film. 9 . The injection mold with cutting structure according to claim 4 , wherein the side wall of the cutting edge close to the cavity is aligned with the inner wall of the cavity of the second module. 10. The injection mold with a cutting structure according to claim 2, wherein the cutting blade is integrally formed on the periphery of the core of the first module.

Images