CN111791510A - A kind of IML integral forming equipment and its continuous forming process - Google Patents

Abstract

The invention relates to the field of molding technology, and discloses an IML self-assembled molding equipment, comprising a molding machine base, the molding machine base is provided with a first push plate and a second push plate, the molding machine base is provided with a pressure molding device and an injection molding device, wherein a rotating device is further arranged between the first push plate and the second push plate; and a compound mold device is further included, and the compound mold device includes a first molding die, a second molding die and a third molding die, The first molding die is connected to the first push plate, the second molding die is mounted on the rotating device, and the third molding die is mounted on the second push plate; the molding equipment assembly has the following advantages: 1. Only one person is required to be on duty, which can greatly save labor; 2. Reduce the floor space due to multi-equipment corresponding to multi-process, 3. Reduce production and manufacturing costs; and the IML integrated continuous molding process provided by the present invention can greatly improve production. benefit.

Description

A kind of IML integral forming equipment and its continuous forming process

technical field

The invention relates to the technical field of IML forming, in particular to an IML integral forming equipment and a continuous forming process thereof.

Background technique

IML, refers to In Molding Label, the Chinese name is in-mold insert injection molding technology, because the existing injection molding products are injection molded, and then the surface of the product is printed with patterns, etc. Since these printing patterns are located on the surface of the injection molded product, Therefore, after the product is used for a period of time, the phenomenon of color fading and scratching will occur, which will affect the overall aesthetics and practicability of the product.

The IML technology solves these problems better. The existing IML injection molding technology for in-mold inserts is to first mold a surface product (usually transparent), and then print the pattern on the inner surface, and then use the surface product to form two parts. Then put it into the mold for injection molding by inserting parts, so that the printed pattern and color are located between the two layers of materials, which better solves the shortcomings of color fading and scratching. However, the existing IML mold insert forming technology has high cost, and requires multiple processes to be completed separately, which consumes a lot of manpower and material resources. As a result, the further application of the IML technology is severely restricted. Therefore, the present inventor has made new inventions.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an IML self-assembled molding equipment and its continuous molding process in view of the deficiencies of the prior art.

In order to achieve the above purpose, an IML self-assembly molding equipment of the present invention includes a molding machine base, the molding machine base is provided with a first push plate and a second push plate, and the molding machine base is provided with a pressure molding device and an injection molding device. A forming device, a rotating device is also arranged between the first push plate and the second push plate; and a composite mold device is further included, and the composite mold device includes a first forming die, a second forming die and a third forming die, so The first molding die is connected to the first push plate, the second molding die is mounted on the rotating device, and the third molding die is mounted on the second push plate.

Further, one side of the second molding die is provided with a first mold cavity, the other side is provided with a second mold cavity, and the first mold cavity and the second mold cavity are symmetrical.

Further, the pressure molding device is a high-pressure gas molding device, the first molding die is provided with a pressure cavity, and the first molding die and the second molding die can be sealingly matched, preferably by means of a sealing strip to achieve double sealing, That is to say, the double sealing strip realizes the air seal and prevents the air pressure from leaking.

Preferably, the temperature of the high-pressure gas is 80-120°C, and the pressure is 30-50kg.

Further, the pressure forming device is a hot pressing forming device, and the programmed first forming mold is provided with a hot pressing punch matched with the first mold cavity or the second mold cavity.

Preferably, the temperature of the hot pressing punch is 80-120°C.

Further, the forming machine base is provided with a first hydraulic device for driving the first push plate to reciprocate, and a second push device for driving the second push plate or the rotary device to reciprocate linearly.

Further, the rotating device includes an upper support, an upper rotating base connected to the upper support, a lower support, a lower rotating base connected to the lower support, and a transmission mechanism for driving the lower rotating base to reciprocate.

The present invention also provides an IML integrated continuous molding process, which specifically includes the following molding steps:

S1. Positioning step, putting the film into the composite mold and positioning;

S2. In the initial forming step, the composite mold is first subjected to high pressure or hot pressing molding, and the film is located in the cavity of the middle mold of the composite mold after molding;

S3. Compounding step, the middle mold is rotated 180 degrees horizontally, and another film is placed in another mold cavity of the middle mold for positioning, and high-pressure or hot-pressing molding is performed; at the same time, injection molding compounding is performed to make the formed film undergo inner injection molding compounding ;

S4. Unloading, the composite molded products are automatically unloaded.

Further, in step S2, high-pressure forming is a high-pressure gas, the temperature of the gas is 80-120°C, the pressure is 30-50kg, and the temperature of hot-pressing is 80-120°C.

Beneficial effects: Compared with the prior art, an IML self-assembled molding device of the present invention includes a molding machine base, the molding machine base is provided with a first push plate and a second push plate, and the molding machine base is provided with a A pressure molding device and an injection molding device, a rotation device is also arranged between the first push plate and the second push plate; and a composite mold device is also included, and the composite mold device includes a first molding die, a second molding die, and a first molding die. Three forming molds, the first forming mold is connected to the first push plate, the second forming mold is installed on the rotating device, and the third forming mold is installed on the second push plate; the forming equipment assembly has the following Advantages: 1. Only one person is required to be on duty, which can greatly save labor; 2. Reduce floor space due to multi-equipment corresponding to multi-process, 3. Reduce production and manufacturing costs; and the present invention provides an integrated continuous molding process for IML It can greatly improve production efficiency and composite molding quality.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a structural diagram of the composite mold device of the present invention.

FIG. 3 is a structural diagram of another embodiment of the present invention.

Reference numerals include:

Forming machine base--1, first push plate--11, second push plate--12, pressure molding device--2, injection molding device--3, rotating device--4, upper bracket--41, upper Rotary seat--42, lower bracket--43, lower rotary seat--44, transmission mechanism--45, compound mold device--5, first forming mold--51, pressure cavity--511, hot embossing Mould--512, second molding mold--52, first mold cavity--521, second mold cavity--522, third molding mold--53.

Detailed ways

The present invention will be described in detail below with reference to Figures 1 to 3 .

An IML self-assembled molding equipment of the present invention includes a molding machine base 1, the molding machine base 1 is provided with a first push plate 11 and a second push plate 12, and the molding machine base 1 is provided with a pressure forming device 2 and Injection molding device 3, a rotating device 4 is further provided between the first push plate 11 and the second push plate 12; and a compound mold device 5 is further included, and the compound mold device 5 includes a first mold 51, a second mold A mold 52 and a third molding mold 53, the first molding mold 51 is connected to the first push plate 11, the second molding mold 52 is installed on the rotating device 4, and at the same time, the second molding mold 52 is provided with a heat preservation device, The holding temperature is about 80-100°C, so that the thin plate product formed for the first time will not shrink and deform rapidly, so as to facilitate the injection molding of the second time. The third molding die 53 is installed on the second push plate 12 . The molding equipment assembly has a space for accommodating a mold between the first push plate 11 and the second push plate 12, and the composite mold device 5 is respectively installed on the first push plate 11, the second push plate 12 and the rotating device 4. During operation, the first molding die 51 cooperates with one side of the second molding die 52, and the pressure molding device 2 is used for the first molding. Specifically, the film is placed on the second molding die 52, and then molded into the corresponding After the shape is formed, the first forming die 51 is moved backward under the action of the first push plate 11. At this time, the pressure-formed film is left in the second forming die 52. The second forming die 52 is then rotated 180 degrees, and the first forming die 51 It cooperates with the second molding die 52 again to form another film by pressure, and at the same time, the previously formed film is injected by the injection molding device 3 under the cooperation of the second molding die 52 and the third molding die 53, so that the The formed inner side is injected and compounded to obtain a compounded product. After the compounding is completed, the second push plate 12 acts on the third molding die 53 and then removes the die to obtain a compounded product. The injection molding device 3 in this solution can adopt the prior art. In summary, this equipment assembly has the following advantages: 1. Only one person is required to be on duty, which can greatly save labor; 2. Reduce the floor space due to multiple equipment corresponding to multiple processes; 3. Reduce manufacturing costs; 4. This kind of Immediately after the first molding, the second molding is performed quickly by rotating, which can improve the molding quality of the product and help reduce the plane deformation and unevenness caused by the long-term cooling of the thin-plate molding due to the existing molding technology. and shrinkage and warping problems;

In this technical solution, one side of the second molding die 52 is provided with a first mold cavity 521, and the other side is provided with a second mold cavity 522, and the first mold cavity 521 is symmetrical with the second mold cavity. During the first molding, the molded film depends on the first mold cavity 521 or the second mold cavity 522. During the second molding, it can be automatically taken out by the opening of the third mold cavity. The reason is: The once-molded film has basically reached a cooling shrinkage shape in the second molding. Of course, in order to better achieve the demolding effect, at least one negative pressure adsorption part is set on the protruding part of the third molding die When moulding, the effect of further assisting adsorption and demoulding is achieved.

As one of the embodiments: as shown in FIG. 3 , the pressure molding device 2 is a high-pressure gas molding device, the first molding die 51 is provided with a pressure cavity 511 , and the first molding die 51 and the second molding die 52 can be Tight fit. The temperature of the high-pressure gas is 80-120°C, and the pressure is 30-50kg. This first molding method using high-temperature and high-pressure gas can be applied to products with a higher surface finish on the inner surface of the product, such as a product with a transparent surface.

As another embodiment: as shown in FIG. 1 , the pressure forming device 2 is a hot pressing forming device, and the programmed first forming mold 51 is provided with a hot pressing device matched with the first mold cavity 521 or the second mold cavity. For the punch 512, the temperature of the hot pressing punch 512 is 80-120°C. This kind of hot pressing method only uses 80-120 ℃, which can greatly save energy and ensure the dimensional accuracy of molding. It is the best choice for products with acute angles.

In this technical solution, the forming machine base 1 is provided with a first hydraulic device for driving the first push plate 11 to reciprocate, and a second push device for driving the second push plate 12 or the rotary device to reciprocate linearly. The first push plate 11 and the second push plate 12 are both slidably connected with high-precision guide rails. The displacement is carried out to improve the molding accuracy of the mold. In addition, the second pushing device can also be used to drive the rotary device to reciprocate linearly relative to the third molding die (not shown in the figure), that is, the third molding die is kept fixed and does not move, which is beneficial to the third molding die. 53 cooperates with the injection head of the injection molding machine, and the above-mentioned first hydraulic device and second pushing device are directly replaced by the existing pushing technology, such as servo drive displacement, hydraulic drive displacement, etc.

In this technical solution, the rotating device 4 includes an upper support 41, an upper rotating base 42 connected to the upper support 41, a lower support 43, a lower rotating base 44 connected to the lower support 43, and the lower rotating base 44 is driven to rotate back and forth The transmission mechanism 45. The transmission mechanism 45 includes a servo motor and a gear set, and the servo motor is uniformly controlled by the control device of the equipment assembly. The second molding die 52 is installed on the upper rotating base 42 and the lower rotating base 44 . During operation, the transmission mechanism 45 drives the second molding die 52 to rotate forwardly or reversely by 180 degrees.

The present invention also provides an IML integrated continuous molding process, which specifically includes the following molding steps:

S1. Positioning step, put the film into the composite mold and perform positioning, the film is a composite plate, the composite material is PC and PMMA, and the film thickness is 0.6-1mm;

S2. In the initial forming step, the composite mold is first subjected to high pressure or hot pressing molding, and the film is located in the cavity of the middle mold of the composite mold after molding;

S3. In the compounding step, the middle mold is heated and kept at 80-100°C, and rotated 180 degrees horizontally, and another film is placed in another cavity of the middle mold for positioning, and high-pressure or hot-pressing molding is performed; at the same time, injection molding is performed. Compounding, making the formed film undergo inner injection molding compounding;

S4. Unloading, the composite molded products are automatically unloaded. This molding process only needs one person to be on duty, which can greatly save labor; improve molding efficiency; this method of rapidly rotating the second molding immediately after the first molding can improve the molding quality of the product, which is beneficial to The problems such as plane deformation, unevenness, shrinkage and warpage caused by long-term cooling of thin-plate forming parts caused by the existing forming technology are reduced.

Further, in step S2, high-pressure molding is performed into high-pressure gas, the temperature of the gas is 80-120° C., and the pressure is 30-50 kg, which is the first molding method using high-temperature and high-pressure gas, which can be applied to the smoothness of the inner surface of the product. For high-quality products, such as products with a transparent surface, the temperature of hot pressing is 80-120 °C, which can greatly save energy and ensure the dimensional accuracy of the molding. It is the best choice for products with acute angles.

The above contents are only preferred embodiments of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific embodiments and application scope. limits.

Claims (10)

1. An IML self-assembly molding equipment, comprising a molding machine base, characterized in that: the molding machine base is provided with a first push plate and a second push plate, and the molding machine base is provided with a pressure molding device and an injection molding device , a rotating device is also arranged between the first push plate and the second push plate; a composite mold device is also included, and the composite mold device includes a first molding die, a second molding die and a third molding die. A molding die is connected to the first push plate, the second molding die is mounted on the rotating device, and the third molding die is mounted on the second push plate. 2 . The IML self-contained molding equipment according to claim 1 , wherein a first mold cavity is provided on one side of the second molding mold, and a second mold cavity is provided on the other side. Symmetrical with the second cavity. 3 . The IML self-contained molding equipment according to claim 2 , wherein the pressure molding device is a high-pressure gas molding device, the first molding die is provided with a pressure cavity, and the first molding die is connected to the second molding die. 4 . Forming dies can be sealingly fitted. 4 . The IML self-assembled molding equipment and its continuous molding process according to claim 3 , wherein the temperature of the high-pressure gas is 80-120° C., and the pressure is 30-50 kg. 5 . 5 . The IML self-contained molding equipment according to claim 2 , wherein the pressure molding device is a hot pressing molding device, and the programmed first molding die is provided with a first cavity or a second cavity. 6 . Matching hot stamping die. 6 . The IML self-assembly molding equipment according to claim 5 , wherein the temperature of the hot-pressing punch is 80-120° C. 7 . 7 . The IML self-contained molding equipment according to claim 1 , wherein the molding machine base is provided with a first hydraulic device for driving the first push plate to reciprocate, and for driving the second push plate to reciprocate linear motion. 8 . the second pusher. 8 . The IML self-assembly molding equipment according to claim 1 , wherein the rotating device comprises an upper bracket, an upper rotating seat connected to the upper bracket, a lower bracket, and a lower bracket connected to the lower bracket. 9 . The lower rotating seat, and the transmission mechanism that drives the reciprocating rotation of the lower rotating seat. 9. An IML self-assembled continuous molding process, characterized in that, comprises the following molding steps: S1. Positioning step, putting the film into the composite mold and positioning; S2. In the initial forming step, the composite mold is first subjected to high pressure or hot pressing molding, and the film is located in the cavity of the middle mold of the composite mold after molding; S3. Compounding step, the middle mold is rotated 180 degrees horizontally, and another film is placed in another mold cavity of the middle mold for positioning, and high-pressure or hot-pressing molding is performed; at the same time, injection molding compounding is performed to make the formed film undergo inner injection molding compounding ; S4. Unloading, the composite molded products are automatically unloaded. 10. An IML self-assembled continuous molding process, characterized in that, in step S2, the high-pressure molding is a high-pressure gas, the temperature of the gas is 80～120° C., the pressure is 30～50kg, and the temperature of the hot pressing is 80～120 ℃. 120°C.

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