Integrated IML injection mold

Abstract

The utility model provides an integrated IML injection mold which comprises a movable mold plate and a fixed mold plate, one side, close to the fixed mold plate, of the movable mold plate is connected with a lower mold core, one side, close to the movable mold plate, of the fixed mold plate is connected with an upper mold core, the lower mold core and the upper mold core are oppositely arranged, and the lower mold core and the upper mold core abut against each other to form a mold cavity. The lower die core is provided with a first blanking port and a second blanking port. The upper die core is connected with a first stamping knife and a second stamping knife, the first stamping knife corresponds to the first blanking opening, and the second stamping knife corresponds to the second blanking opening. According to the utility model, hot pressing and injection molding can be completed simultaneously, the technological process is reduced, the material turnover time is shortened, the processing efficiency is improved, the processing cost is reduced, and the first stamping knife and the second stamping knife synchronously punch and mold the product through hole in the injection molding process, so that the product through hole positioning precision is improved, the product quality is improved, and a film is prevented from moving in the injection molding process; scratches are reduced, and attractiveness is improved.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically relating to an integrated IML injection mold. Background Technology

[0002] IML (Injection Molding) is an injection molding process that fuses a pre-printed transparent rigid film with plastic to form a single unit. Products made using this process offer a wide range of colors, support various materials, and exhibit excellent wear and scratch resistance. The IML injection molding process typically includes: material cutting – 3D printing – ink curing – applying protective film – thermoforming – die-cutting – insert injection molding. The manufacturing process is complex, and scratches and impacts are common during material transfer, affecting processing efficiency, product quality, and increasing processing costs.

[0003] Therefore, the above problems urgently need to be solved. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, this utility model provides an integrated IML injection mold, which reduces the process flow, reduces material turnover time, improves processing efficiency, and reduces processing costs.

[0005] Technical Solution: To achieve the above objectives, this utility model provides an integrated IML injection mold, including a moving mold plate and a fixed mold plate. A lower mold core is connected to the moving mold plate near the fixed mold plate, and an upper mold core is connected to the fixed mold plate near the moving mold plate. The lower and upper mold cores are arranged opposite to each other, and their contact forms a mold cavity. The lower mold core has a first blanking port and a second blanking port. The upper mold core is connected to a first punch and a second punch, with the first punch and the first blanking port correspondingly positioned, and the second punch and the second blanking port correspondingly positioned. IML refers to an in-mold insert injection molding technology. Traditional IML processes require hot-pressing and punching a thin film before injection molding it into a mold. This utility model is used for injection molding of thin-walled shells. The production steps include printing on the film, punching out the shape after the film has cured, placing the punched film onto the top surface of the lower mold core, and then closing the mold. During mold closing, the first and second punches extend into the first and second blanking ports respectively to cut and position the film. Then, molten plastic is injected into the mold cavity. The high temperature of the molten plastic softens the film, causing it to adhere tightly to the bottom surface of the mold cavity. After filling the cavity, pressure is maintained and the film is cooled and solidified before final mold separation. This invention can simultaneously complete hot pressing and injection molding, reducing process steps, material turnaround time, improving processing efficiency, and lowering processing costs. Furthermore, during injection molding, the first and second punches simultaneously cut and shape the through-holes in the product, improving the positioning accuracy of the through-holes, enhancing product quality, preventing film movement during injection molding, reducing scratches, and improving aesthetics.

[0006] Furthermore, in the aforementioned integrated IML injection mold, the first punch has an elliptical cross-section. The first punch has a first cutting edge at its end near the moving mold plate, and this first cutting edge is located along the outer side wall of the punch. The end of the first punch away from the moving mold plate has a first limiting portion. The first punch is connected to a first through groove in the upper mold core. The end of the first through groove near the fixed mold plate has a first countersunk head, and the first limiting portion is connected to the first countersunk head. The end of the first punch with the first limiting portion abuts against the fixed mold plate. The first punch is connected to the first through groove via the first limiting portion, and the fixed mold plate abuts against the first punch, fixing it within the first through groove. This connection is reliable and facilitates maintenance.

[0007] Furthermore, in the aforementioned integrated IML injection mold, the second punch has a square cross-section, and there is one or more second punches. The second punch has a second cutting edge at the end near the moving platen. The second punch has a second limiting part at the end away from the moving platen. The second punches are connected to the second through grooves in the upper mold core. The second through groove has a second countersunk head at the end near the fixed platen, and the second limiting part is connected to the second countersunk head. The end of the second punch with the second limiting part abuts against the fixed platen. The second punch is connected to the second through groove via the second limiting part, and the fixed platen abuts against the second punch, fixing it within the second through groove. This connection is reliable and easy to maintain.

[0008] Furthermore, in the aforementioned integrated IML injection mold, the lower mold core has a punch, and the upper mold core has a corresponding groove. Elastic positioning pins are provided along the outer periphery of the punch. During mold parting, the top surface of the elastic positioning pins is higher than the top surface of the punch. During mold parting, the pre-cut film is placed on the top surface of the punch, and the elastic positioning pins provide a limiting position for the film. Then, the mold closes, the upper mold core presses against the elastic positioning pins, and the elastic positioning pins are compressed into the lower mold core. The lower mold core and the upper mold core abut against each other, and the punch and groove form a mold cavity, awaiting injection molding. The elastic positioning pins serve to position the film and prevent film displacement.

[0009] Furthermore, in the aforementioned integrated IML injection mold, there are two or more lower mold cores arranged in parallel, with corresponding upper and lower mold cores. The use of two or more upper and lower mold cores creates multiple mold cavities, improving production efficiency.

[0010] Furthermore, in the aforementioned integrated IML injection mold, the elastic positioning post includes a pin and a limiting ring, which are coaxially integrated. One end of the pin connected to the limiting ring has a blind hole, within which a spring is connected. A countersunk through-hole is located on the side of the lower mold core away from the upper mold core. The elastic positioning post passes through this countersunk through-hole. The end of the spring away from the pin abuts against a wear-resistant plate connected to the moving mold plate. The spring presses against the pin, causing it to extend beyond the upper surface of the lower mold core. During mold parting, the spring presses against the bottom of the blind hole, and the pin extends beyond the upper surface of the lower mold core. During mold closing, the upper mold core presses against the pin, and the spring contracts under the pressure of the pin, causing the pin to retract into the countersunk through-hole in the lower mold core, thus preventing the elastic positioning post from interfering with mold closing.

[0011] Furthermore, in the aforementioned integrated IML injection mold, the fixed mold plate is connected to guide pillars, and the guide pillars and the moving mold plate are slidably connected. Upper positioning blocks are connected to each of the four sides of the fixed mold plate, and lower positioning blocks are connected to each of the four sides of the moving mold plate. The upper and lower positioning blocks are correspondingly configured, and the positioning pins on the positioning blocks extend into the positioning grooves on the lower positioning blocks. The moving mold plate slides along the guide pillars to ensure mold closing accuracy. During mold closing, the positioning pins are inserted into the positioning grooves to ensure precise alignment between the moving and fixed mold plates, thereby improving product quality.

[0012] Furthermore, in the aforementioned integrated IML injection mold, a fixed plate is connected to the end of the fixed platen furthest from the moving platen, a panel is connected to the side of the fixed platen furthest from the fixed platen, and a fixing ring is connected to the side of the panel furthest from the fixed plate. The fixing ring is equipped with a nozzle. The fixed plate is equipped with runners and cooling runners, which is a standard feature of injection molds.

[0013] Furthermore, in the aforementioned integrated IML injection mold, an ejector mechanism is connected to the side of the moving platen away from the fixed platen, and ejector pins of the ejector mechanism extend into the lower mold core. A base plate is provided on the side of the ejector mechanism away from the moving platen. The ejector mechanism includes a square iron piece, an ejector guide plate and an ejector base plate slidably connected to the square iron piece, a set of ejector pins slidably connected to the ejector guide plate, the bottom of the ejector pins abutting against the ejector base plate, and a push rod connected to the ejector base plate. The push rod passes through the base plate, pushing the push rod to cause the ejector pins to extend or retract.

[0014] As can be seen from the above technical solution, this utility model has the following beneficial effects: The integrated IML injection mold of this utility model can simultaneously complete hot pressing and injection molding, reducing process steps, reducing material turnover time, improving processing efficiency, and reducing processing costs. Furthermore, during the injection molding process, the first and second punches simultaneously punch and form the product's through holes, improving the positioning accuracy of the through holes, improving product quality, preventing film movement during injection molding, reducing scratches, and improving aesthetics. The elastic positioning pins provide positioning for the film, preventing film displacement. It also avoids interference with mold closing. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the integrated IML injection mold of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the moving template;

[0017] Figure 3 This is a schematic diagram of the structure of the template.

[0018] Figure 4 This is a schematic diagram of the structure of the first punch.

[0019] Figure 5 This is a schematic diagram of the structure of the upper mold core;

[0020] Figure 6 This is a schematic diagram of the structure of the second punch.

[0021] Figure 7 This is a schematic diagram of the installation of the elastic positioning column.

[0022] In the diagram: 1. Moving template; 11. Lower mold core.

[0023] 111. First blanking port; 112. Second blanking port; 211. First punch; 2111. First cutting edge; 2112. First limiting part; 212. Second punch; 2121. Second cutting edge; 2122. Second limiting part; 213. First through groove; 2131. First countersunk head; 214. Second through groove; 2141. Second countersunk head; 12. Punch; 13. Elastic positioning pin; 131. Pin; 1311. Blind hole; 132. Limiting ring; 133. Spring; 2. Fixed template; 21. Upper mold core; 22. Groove; 3. Wear-resistant plate; 4. Guide post; 51. Upper positioning block; 511. Positioning pin; 52. Lower positioning block; 521. Inside the positioning groove; 6. Fixing plate; 7. Panel; 61. Fixing ring; 8. Ejector mechanism; 9. Base plate. Detailed Implementation

[0024] Example 1

[0025] like Figure 1-3 The illustrated integrated IML injection mold includes a movable mold plate 1 and a fixed mold plate 2. A lower mold core 11 is connected to the movable mold plate 1 near the fixed mold plate 2, and an upper mold core 21 is connected to the fixed mold plate 2 near the movable mold plate 1. The lower mold core 11 and the upper mold core 21 are arranged opposite to each other, and abutting together to form a mold cavity. The lower mold core 11 has a first blanking port 111 and a second blanking port 112. The upper mold core 21 is connected to a first punch 211 and a second punch 212. The first punch 211 and the first blanking port 111 are correspondingly arranged, and the second punch 212 and the second blanking port 112 are correspondingly arranged.

[0026] In this embodiment, the lower mold core 11 is provided with a punch 12, and the upper mold core 21 is provided with a groove 22 corresponding to the punch 12. An elastic positioning post 13 is provided along the outer periphery of the punch 12. During mold parting, the top surface of the elastic positioning post 13 is higher than the top surface of the punch 12.

[0027] In this embodiment, there are two or more lower mold cores 11 arranged in parallel, and the upper mold cores 21 and lower mold cores 11 are arranged accordingly. By setting two or more upper mold cores 21 and lower mold cores 11, multiple mold cavities are formed, thereby improving production efficiency.

[0028] In this embodiment, the fixed template 2 is connected to a guide post 4, and the guide post 4 and the moving template 1 are slidably connected. The fixed template 2 is connected to an upper positioning block 51 on each of its four sides, and the moving template 1 is connected to a lower positioning block 52 on each of its four sides. The upper positioning block 51 and the lower positioning block 52 are respectively set, and the positioning pin 511 of the positioning block 51 extends into the positioning groove 521 of the lower positioning block 52.

[0029] In this embodiment, a fixing plate 6 is connected to the end of the fixed template 2 away from the moving template 1. A panel 7 is connected to the side of the fixing plate 6 away from the fixed template 2. A fixing ring 61 is connected to the side of the panel 7 away from the fixing plate 6. The nozzle is connected between the fixing ring 61 and the fixing plate 6. The fixing plate 6 is provided with flow channels and cooling flow channels. The above is a conventional setting for injection molds.

[0030] In this embodiment, an ejector mechanism 8 is connected to the side of the moving template 1 away from the fixed template 2. The ejector pins of the ejector mechanism 8 extend into the lower mold core 11. A base plate 9 is provided on the side of the ejector mechanism 8 away from the moving template 1. The ejector mechanism 8 includes a square iron piece, an ejector guide plate and an ejector base plate slidably connected to the square iron piece, a set of ejector pins slidably connected to the ejector guide plate, the bottom of the ejector pins abutting against the ejector base plate, and a push rod connected to the ejector base plate. The push rod passes through the base plate 9, and pushing the push rod will cause the ejector pins to extend or retract.

[0031] like Figure 4-5 The integrated IML injection mold shown has an elliptical cross-section for the first punch 211. The first punch 211 has a first cutting edge 2111 at its end near the moving mold plate 1, which is located along the outer side wall of the punch 211. The end of the first punch 211 away from the moving mold plate 1 has a first limiting part 2112. The first punch 211 is connected to a first through groove 213 in the upper mold core 21. The end of the first through groove 213 near the fixed mold plate 2 has a first countersunk head 2131, which is connected to the first countersunk head 2131. The end of the first punch 211 with the first limiting part 2112 abuts against the fixed mold plate 2. The first punch 211 is connected to the first through groove 213 via the first limiting part 2112, and the fixed mold plate 2 abuts against the first punch 211, fixing it within the first through groove 213. This connection is reliable and easy to maintain.

[0032] like Figure 5-6The integrated IML injection mold shown has a square cross-section for the second punch 212, and there are one or more second punches 212. The end of the second punch 212 near the moving mold plate 1 has a second cutting edge 2121. The end of the second punch 212 away from the moving mold plate 1 has a second limiting part 2122. The second punches 212 are connected to the second through groove 214 in the upper mold core 21. The end of the second through groove 214 near the fixed mold plate 2 has a second countersunk head 2141, and the second limiting part 2122 is connected to the second countersunk head 2141. The end of the second punch 212 with the second limiting part 2122 abuts against the fixed mold plate 2. The second punch 212 is connected to the second through groove 214 through the second limiting part 2122, and the fixed mold plate 2 abuts against the second punch 212, fixing it within the second through groove 214. The connection is reliable and easy to maintain. The cross-section of the second cutting edge 2121 is an arc shape corresponding to the side of the product. The second cutting edge 2121 presses the film to make it bend. When the film is against the lower die core 11, the second cutting edge 2121 punches the film, improving the punching accuracy of the film side.

[0033] like Figure 7 The integrated IML injection mold shown includes an elastic positioning post 13 comprising a pin 131 and a limiting ring 132, which are coaxially integrated. One end of the pin 131 connecting to the limiting ring 132 has a blind hole 1311, within which a spring 133 is connected. The lower mold core 11 has a countersunk through hole on the side away from the upper mold core 21. The elastic positioning post 13 passes through this countersunk through hole. The end of the spring 133 away from the pin 131 abuts against a wear-resistant plate 3 connected to the moving mold plate 1. The spring 133 presses against the pin 131, causing it to extend beyond the upper surface of the lower mold core 11. During mold parting, the spring 133 presses against the bottom of the blind hole 1311, and the pin 131 extends beyond the upper surface of the lower mold core 11. When the mold is closed, the upper mold core 21 presses against the pin 131, and the spring 133 is compressed by the pin 131. The pin 131 retracts into the countersunk through hole provided in the lower mold core 11 to avoid the elastic positioning pin 13 from interfering with the mold closing.

[0034] This invention is used for injection molding of thin-walled housings; this embodiment uses a mobile phone case as an example. First, the desired pattern is printed on the film. After the film cures, the shape is punched out. The punched film is placed on the top surface of the lower mold core 11. At this time, the pin 131 extends from the upper end face of the lower mold core 11, and the pin 131 limits the film. Then, the mold is closed. During the mold closing process, the first punch 211 and the second punch 212 extend into the first and second blanking ports 111 and 112 respectively to punch the film. The first punch 211 punches the through-hole for the mobile phone camera, and the second punch 212 punches the through-hole for the mobile phone power switch and volume buttons. Because the first punch 211 and the second punch 212 penetrate the film and thus position it, the upper mold core 21 presses against the elastic positioning post 13. The elastic positioning post 13 is compressed into the lower mold core 11 until the lower mold core 11 and the upper mold core 21 abut. Then, molten plastic is injected into the mold cavity through the nozzle connected to the retaining ring 61. The molten plastic itself is at a high temperature, which softens the film and makes it adhere tightly to the bottom surface of the mold cavity. After the mold cavity is filled with molten plastic, it is held under pressure and cooled to form the final product. Finally, the mold is separated. The push rod pushes the ejector plate, which in turn causes the ejector pin to extend into the mold cavity and demold the product.

[0035] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. An integrated IML injection mold, characterized in that: The mold includes a moving template (1) and a fixed template (2). The moving template (1) is connected to a lower mold core (11) on the side near the fixed template (2), and the fixed template (2) is connected to an upper mold core (21) on the side near the moving template (1). The lower mold core (11) and the upper mold core (21) are arranged opposite to each other and abut against each other to form a mold cavity. The lower mold core (11) is provided with a first blanking port (111) and a second blanking port (112). The upper mold core (21) is connected to a first punch (211) and a second punch (212). The first punch (211) and the first blanking port (111) are respectively arranged, and the second punch (212) and the second blanking port (112) are respectively arranged.

2. The integrated IML injection mold according to claim 1, characterized in that: The first punch (211) has an elliptical cross-section. The first punch (211) has a first cutting edge (2111) at the end near the moving template (1). The first cutting edge (2111) is set along the outer side wall of the first punch (211). The first punch (211) has a first limiting part (2112) at the end away from the moving template (1). The first punch (211) is connected to the first through groove (213) provided in the upper mold core (21). The first through groove (213) has a first countersunk head (2131) at the end near the fixed template (2). The first limiting part (2112) is connected to the first countersunk head (2131). The end of the first punch (211) with the first limiting part (2112) abuts against the fixed template (2).

3. The integrated IML injection mold according to claim 1, characterized in that: The second punch (212) has a square cross-section and there is one or more second punches (212); the second punch (212) has a second cutting edge (2121) at the end near the moving template (1); the second punch (212) has a second limiting part (2122) at the end away from the moving template (1); the second punch (212) is connected to the second through groove (214) provided in the upper mold core (21); the second through groove (214) has a second countersunk head (2141) at the end near the fixed template (2); the second limiting part (2122) is connected to the second countersunk head (2141); the end of the second punch (212) with the second limiting part (2122) abuts against the fixed template (2).

4. The integrated IML injection mold according to claim 1, characterized in that: The lower mold core (11) is provided with a punch (12), and the upper mold core (21) is provided with a groove (22) corresponding to the punch (12); an elastic positioning post (13) is provided along the outer periphery of the punch (12); when the mold is separated, the top surface of the elastic positioning post (13) is higher than the top surface of the punch (12).

5. The integrated IML injection mold according to claim 4, characterized in that: The lower mold core (11) is provided in two or more, and the lower mold cores (11) are arranged in parallel. The upper mold core (21) and the lower mold core (11) are arranged accordingly.

6. The integrated IML injection mold according to claim 4, characterized in that: The elastic positioning post (13) includes a pin (131) and a limiting ring (132). The pin (131) and the limiting ring (132) are coaxially integrated. The pin (131) is connected to the limiting ring (132) at one end with a blind hole (1311). A spring (133) is connected inside the blind hole (1311). The lower mold core (11) is provided with a countersunk through hole on the side away from the upper mold core (21). The elastic positioning post (13) passes through the countersunk through hole. The end of the spring (133) away from the pin (131) abuts against the wear-resistant plate (3) connected to the moving template (1). The spring (133) squeezes the pin (131) so that the pin (131) extends out of the upper end face of the lower mold core (11).

7. The integrated IML injection mold according to claim 1, characterized in that: The fixed template (2) is connected to a guide post (4), and the guide post (4) and the moving template (1) are slidably connected; the fixed template (2) is connected to an upper positioning block (51) on each of its four sides, and the moving template (1) is connected to a lower positioning block (52) on each of its four sides. The upper positioning block (51) and the lower positioning block (52) are respectively set, and the positioning pin (511) provided on the upper positioning block (51) extends into the positioning groove (521) provided on the lower positioning block (52).

8. The integrated IML injection mold according to claim 1, characterized in that: The fixed template (2) is connected to a fixed plate (6) at the end away from the moving template (1), and a panel (7) is connected to the side of the fixed plate (6) away from the fixed template (2). A fixing ring (61) is connected to the side of the panel (7) away from the fixed plate (6).

9. The integrated IML injection mold according to claim 1, characterized in that: The moving template (1) is connected to an ejector mechanism (8) on the side away from the fixed template (2), and the ejector pins of the ejector mechanism (8) extend into the lower mold core (11); the ejector mechanism (8) is provided with a base plate (9) on the side away from the moving template (1).

Images