A plastic shell molding die

Abstract

This invention relates to the field of injection mold technology, and provides a plastic shell molding mold, including a fixed mold base plate, a movable mold base plate disposed on one side of the fixed mold base plate, and a base plate disposed on the side of the movable mold base plate away from the fixed mold base plate. This invention, through the provision of a fixing structure, places two sets of slide rails parallel and symmetrically on one side of the fixed mold base plate and the movable mold base plate. Moving bolts into the mounting groove allows the slide rails to be fixedly connected to the fixed mold base plate and the movable mold base plate respectively via bolts. Both ends of the slide rails are chamfered, allowing the slide rails to quickly move into the sliding groove, thereby enabling the punch and die to be quickly installed and fixed. Under the elastic force of a first return spring, the top of the positioning block moves into the positioning groove, allowing the punch and die to engage with the slide rails respectively via the positioning block, thus enabling the punch and die to be quickly positioned. Replacement is time-saving and labor-saving, thereby improving the working efficiency of the plastic shell molding mold during use.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and in particular to a plastic shell molding mold. Background Technology

[0002] In the production process of plastic shells, defective products, material stalks, and flash, burrs, and overflow trimmed from plastic parts are the main waste materials in injection molding. When recycling plastic waste, it is heated and melted again and injected into the mold under high pressure by the injection molding machine. After cooling and solidification, a new plastic shell is obtained. Therefore, a plastic shell molding mold is used. To this end, patent CN220903988U discloses a plastic shell injection mold. The cooperation between the pull rod and the sliding pin allows the worktable to flip upward synchronously when the upper and lower mold plates are separated, moving the injection-molded plastic shell to the front side for easy handling by workers, reducing labor intensity and improving safety. The cooperation between the top block and the tensioning component allows the processed plastic shell to automatically separate from the upper mold plate when the upper mold plate rises, and to automatically reset when the upper and lower mold plates close, improving convenience while having a high degree of automation and stability. The cooperation between the top rod and the lower mold plate can lift the processed plastic shell upward after production, preventing the plastic shell from sticking to the lower mold plate. The cooperation between the positioning pin and the positioning hole can further ensure that the upper and lower molds can be precisely matched, thereby improving the precision of the plastic shell and the product quality. The plastic shell injection mold described above uses a pull rod and a sliding pin to allow the lower mold plate to flip for easy material removal, and the upper mold plate to automatically unload material through a top block and a tensioning component. However, when plastic waste is recycled, it will be processed into different types of shells according to its material properties. The replacement of the upper and lower mold plates in the plastic shell injection mold described above is time-consuming and labor-intensive, and it is inconvenient to position them, which affects the work efficiency during use. Summary of the Invention

[0003] The purpose of this invention is to provide a plastic shell molding die to solve the defects of existing plastic shell molding dies that are inconvenient to replace and position.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a plastic shell molding die, including a fixed mold base plate; A movable mold base plate is provided on one side of the fixed mold base plate, a base plate is provided on the side of the movable mold base plate away from the fixed mold base plate, a cooling structure is provided above the movable mold base plate, and a fixing structure is evenly installed on one side of the fixed mold base plate and the movable mold base plate. A concave mold is provided on the outer side of the fixed structure on one side of the fixed mold base plate, and a convex mold is provided on the outer side of the fixed structure on one side of the moving mold base plate. A demolding structure is provided inside the convex mold. A sliding groove is provided on the side of the convex mold and the concave mold near the fixed structure. A positioning groove is provided on one side of the sliding groove. The fixed structure includes a slide rail disposed on one side of the fixed mold base plate and the moving mold base plate. Mounting grooves are provided on both sides of the slide rail, and bolts are installed inside each mounting groove. A movable groove is provided at the middle position of the slide rail. A connecting groove is provided at the top of the movable groove inside the slide rail. A positioning block is provided inside the movable groove. First return springs are provided on both sides of the bottom end of the positioning block inside the movable groove. First limiting grooves are provided on both sides of the bottom end of the positioning block. Second limiting grooves are provided on both sides of the bottom end of the movable groove inside the slide rail.

[0005] Preferably, a positioning ring is fixed at the middle position on one side of the fixed mold base plate, an injection channel is opened at the middle position inside the fixed mold base plate, a cavity is opened on one side inside the cavity, an venting groove is opened on the top side of the cavity away from the fixed mold base plate, one end of the injection channel extends into the cavity and communicates with the cavity, and the bottom end of the venting groove communicates with the cavity.

[0006] Preferably, the cooling structure includes a fixed rod disposed above the moving mold base plate, an adjustment groove is provided on one side of the fixed rod, a stud is passed through the adjustment groove, a nut is threaded to the outer side of the stud at the top of the fixed rod, a water distribution seat is fixed to the bottom of the stud, a water inlet pipe is fixed to one end of the water distribution seat, nozzles are uniformly fixed to the bottom of the water distribution seat, and limit blocks are fixed to both sides of the fixed rod at the top of the water distribution seat.

[0007] Preferably, one end of the fixing rod is fixedly connected to one side of the top of the fixed mold base plate, and the other end of the fixing rod is fixedly connected to one side of the top of the base plate. The adjusting groove is located directly above the concave mold, and the water inlet pipe and the nozzle are connected through the water distribution seat.

[0008] Preferably, guide posts are inserted through the corner positions inside the moving mold base plate, and a reserved hole is opened in the middle position inside the moving mold base plate. An ejector pin is fixed in the middle position on the side of the base plate near the moving mold base plate. An electric push rod is fixedly installed on one side of the base plate below the ejector pin. One end of the guide post is fixedly connected to one side of the fixed mold base plate, and the other end of the guide post is fixedly connected to one side of the base plate. The output end of the electric push rod is fixedly connected to one side of the moving mold base plate. The central axis of the ejector pin and the reserved hole are collinear.

[0009] Preferably, both ends of the slide rail are chamfered, one end of the bolt passes through the slide rail and extends into the interior of the fixed mold base plate and the moving mold base plate respectively, the top end of the positioning block passes through the connecting groove and extends into the interior of the positioning groove, and the slide rail forms a sliding structure with the punch and the die respectively through the sliding groove.

[0010] Preferably, the top end of the first reset spring extends into the interior of the first limiting groove, and the bottom end of the first reset spring extends into the interior of the second limiting groove.

[0011] Preferably, the demolding structure includes a movable cavity disposed inside the punch, a second return spring disposed inside the movable cavity, a connecting rod passing through the second return spring, a return plate fixed to one end of the connecting rod, and an ejector plate fixed to the other end of the connecting rod extending to the outside of the punch.

[0012] Preferably, the ejector plate is disposed inside the punch on the side close to the die, and the central axis of the connecting rod and the reserved hole are collinear.

[0013] Preferably, the reset plate is located at one end inside the movable cavity, and the reset plate and the punch form a telescopic structure through a second reset spring.

[0014] The plastic shell molding die provided by this invention has the following advantages: By setting a fixed structure, two sets of slide rails are placed parallel and symmetrically on one side of the fixed mold base plate and the moving mold base plate. The bolts are moved into the inside of the mounting groove, so that the slide rails are fixedly connected to the fixed mold base plate and the moving mold base plate respectively by bolts. Both ends of the slide rails are provided with chamfers, so that the slide rails can be quickly moved into the inside of the slide groove, and the punch and die can be quickly installed and fixed. Replacement is time-saving and labor-saving, thereby improving the working efficiency of the plastic shell molding mold during use. Furthermore, the punch and die slide on the outside of the slide rail via the slide groove. The positioning block, squeezed by the punch and die, moves into the inside of the slide rail, causing the first return spring to be compressed. When the punch and die move to the middle position of the slide rail, under the elastic force of the first return spring, the top of the positioning block moves into the inside of the positioning groove, so that the punch and die are respectively engaged with the slide rail through the positioning block. This allows the punch and die to be quickly positioned, saving time and effort, and further improving the working efficiency of the plastic shell molding die during use. Furthermore, the electric push rod drives the moving mold base plate to slide outside the guide post, enabling the punch and die to complete the mold opening and closing. After the mold opening is completed, the electric push rod continues to retract, which will drive the moving mold base plate to move towards the base plate, so that one end of the ejector pin passes through the reserved hole and abuts against one end of the reset plate. The ejector pin will push the reset plate to move inside the movable cavity, so that the reset plate drives the ejector plate to move to the outside of the punch through the connecting rod, thereby causing the ejector plate to eject the shell at one end of the punch, completing the demolding process. This saves time and effort during use and further improves the working efficiency of the plastic shell molding mold. With a cooling structure, the fixing rod is fixedly installed above the moving mold base plate, so that the adjusting groove is directly above the cavity mold. The water distribution seat is moved to the bottom of the adjusting groove, so that the stud passes through the adjusting groove and is connected to the nut. The water distribution seat is engaged with the fixing rod through the limiting block. When the water distribution seat is moved to the appropriate position, the nut is rotated to fix the water distribution seat and the fixing rod. Cooling water is delivered to the inside of the water distribution seat through the water inlet pipe, and the nozzle will spray the cooling water onto the outer wall of the cavity mold to cool the cavity mold. Furthermore, during installation, the water distribution seat can be moved, causing the stud to move within the adjustment groove. This allows for adjustment of the water distribution seat's fixed position, facilitating spray position adjustment when changing molds, accelerating heat dissipation, and shortening mold forming time. Consequently, the working efficiency of the plastic shell molding mold is improved during use. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of the present invention; Figure 2 This is a rear view diagram of the present invention; Figure 3 This is a top cross-sectional view of the present invention; Figure 4 This is an exploded schematic diagram of the cooling structure of the present invention; Figure 5 This is an exploded view of the fixed structure of the present invention. Figure 6 This is a rear-view exploded view of the fixed structure of the present invention; Figure 7 This is a side sectional view of the fixed structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle; Figure 9 This is a schematic diagram of the first perspective of the front cross-section of the demolding structure of the present invention; Figure 10 This is a schematic diagram of the second perspective of the front cross-section of the demolding structure of the present invention.

[0016] The reference numerals in the diagram are as follows: 1. Fixed mold base plate; 11. Positioning ring; 12. Injection channel; 2. Cooling structure; 21. Fixing rod; 22. Adjusting groove; 23. Nut; 24. Stud; 25. Water distribution seat; 26. Water inlet pipe; 27. Nozzle; 28. Limiting block; 3. Base plate; 31. Guide post; 32. Ejector pin; 33. Electric push rod; 4. Moving mold base plate; 41. Reserved hole; 5. Fixing structure; 51. Slide rail; 52. Mounting slot; 521. Bolt; 53. Connecting slot; 54. Positioning block; 541. First limiting slot; 55. First return spring; 56. Movable slot; 561. Second limiting slot; 6. Punch; 7. Die; 71. Cavity; 72. Venting slot; 8. Demolding structure; 81. Ejector plate; 82. Movable cavity; 83. Second return spring; 84. Return plate; 85. Connecting rod; 9. Slide groove; 91. Positioning slot. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-10 The present invention provides a plastic shell molding die, including a fixed mold base plate 1.

[0019] Reference Figure 2 and Figure 4 As shown, a moving mold base plate 4 is provided on one side of the fixed mold base plate 1, and a base plate 3 is provided on the side of the moving mold base plate 4 away from the fixed mold base plate 1. A cooling structure 2 is provided above the moving mold base plate 4. The cooling structure 2 includes a fixing rod 21 provided above the moving mold base plate 4. An adjustment groove 22 is provided on one side inside the fixing rod 21. A stud 24 passes through the interior of the adjustment groove 22. A nut 23 is threaded to the outside of the stud 24 at the top of the fixing rod 21. A water distribution seat 25 is fixed to the bottom of the stud 24. A water inlet pipe 26 is fixed to one end of the water distribution seat 25. Spray nozzles 27 are evenly fixed to the bottom of the water distribution seat 25. Limit blocks 28 are fixed to both sides of the fixing rod 21 at the top of the water distribution seat 25. One end of the fixing rod 21 is fixedly connected to one side of the top of the fixed mold base plate 1, and the other end of the fixing rod 21 is fixedly connected to one side of the top of the base plate 3. The adjustment groove 22 is located directly above the cavity mold 7. The water inlet pipe 26 and the spray nozzles 27 are connected through the water distribution seat 25.

[0020] The fixing rod 21 is fixedly installed above the moving mold base plate 4, so that the adjusting groove 22 is located directly above the cavity mold 7. The water distribution seat 25 is moved to the bottom end of the adjusting groove 22, so that the stud 24 passes through the adjusting groove 22 and is connected to the nut 23. The water distribution seat 25 is engaged with the fixing rod 21 through the limiting block 28. When the water distribution seat 25 is moved to a suitable position, the nut 23 is rotated to fix the water distribution seat 25 to the fixing rod 21. Cooling water is delivered to the inside of the water distribution seat 25 through the water inlet pipe 26. The nozzle 27 will spray the cooling water onto the outer wall of the cavity mold 7 to cool the cavity mold 7. During installation, the water distribution seat 25 is moved so that the water distribution seat 25 drives the stud 24 to move inside the adjusting groove 22. The fixed position of the water distribution seat 25 can be adjusted, and the spray position can be adjusted when changing the mold.

[0021] Reference Figure 1 and Figures 5-8 As shown, a fixing structure 5 is evenly installed on one side of the fixed mold base plate 1 and the moving mold base plate 4. The fixing structure 5 includes a slide rail 51 disposed on one side of the fixed mold base plate 1 and the moving mold base plate 4. Mounting grooves 52 are provided on both sides of the slide rail 51. Bolts 521 are installed inside the mounting grooves 52. A movable groove 56 is provided at the middle position of the slide rail 51. A connecting groove 53 is provided at the top of the movable groove 56 inside the slide rail 51. A positioning block 54 is provided inside the movable groove 56. First return springs 55 are provided on both sides of the bottom end of the positioning block 54 inside the movable groove 56. The slide rail 51 has a first limiting groove 541, and the slide rail 51 has a second limiting groove 561 on both sides of the bottom of the movable groove 56 inside. Both ends of the slide rail 51 are chamfered. One end of the bolt 521 passes through the slide rail 51 and extends into the interior of the fixed mold base plate 1 and the movable mold base plate 4 respectively. The top end of the positioning block 54 passes through the connecting groove 53 and extends into the interior of the positioning groove 91. The slide rail 51 forms a sliding structure with the punch 6 and the die 7 respectively through the sliding groove 9. The top end of the first return spring 55 extends into the interior of the first limiting groove 541, and the bottom end of the first return spring 55 extends into the interior of the second limiting groove 561.

[0022] Two sets of slide rails 51 are placed parallel and symmetrically on one side of the fixed mold base plate 1 and the moving mold base plate 4. The bolts 521 are moved into the mounting groove 52, so that the slide rails 51 are fixedly connected to the fixed mold base plate 1 and the moving mold base plate 4 respectively by the bolts 521. Both ends of the slide rails 51 are provided with chamfers, so that the slide rails 51 can be quickly moved into the sliding groove 9, and then the punch 6 and the die 7 can be quickly installed and fixed. The punch 6 and the die 7 slide on the outside of the slide rails 51 through the sliding groove 9. The positioning block 54 will move into the slide rails 51 under the pressure of the punch 6 and the die 7, so that the first return spring 55 is compressed. When the punch 6 and the die 7 move to the middle position of the slide rails 51, under the elastic force of the first return spring 55, the top of the positioning block 54 will move into the positioning groove 91, so that the punch 6 and the die 7 are respectively engaged with the slide rails 51 through the positioning block 54, so that the punch 6 and the die 7 can be quickly positioned.

[0023] Reference Figure 3 , Figure 9 and Figure 10 As shown, a die 7 is provided on the outer side of the fixed structure 5 on one side of the fixed mold base plate 1, and a punch 6 is provided on the outer side of the fixed structure 5 on one side of the moving mold base plate 4. A demolding structure 8 is provided inside the punch 6. The demolding structure 8 includes a movable cavity 82 inside the punch 6. A second return spring 83 is provided inside the movable cavity 82. A connecting rod 85 passes through the second return spring 83. A reset plate 84 is fixed to one end of the connecting rod 85, and the other end of the connecting rod 85 extends to the outside of the punch 6 and is fixed to an ejector plate 81. The ejector plate 81 is located inside the punch 6 on the side near the die 7. The central axis of the connecting rod 85 and the reserved hole 41 are collinear. The reset plate 84 is located at one end inside the movable cavity 82. The reset plate 84 and the punch 6 form a telescopic structure through the second return spring 83. A sliding groove 9 is provided on the side of the punch 6 and the die 7 near the fixed structure 5. A positioning groove 91 is opened on one side of the sliding groove 9. A positioning ring 11 is fixed at the middle position of the mold base plate 1. An injection channel 12 is opened at the middle position inside the fixed mold base plate 1. A cavity 71 is opened on one side inside the cavity 7. An venting groove 72 is opened on the top side of the cavity 71 away from the fixed mold base plate 1. One end of the injection channel 12 extends into the cavity 7 and communicates with the cavity 71. The bottom end of the venting groove 72 is connected to the cavity 71. Guide pins 31 are passed through the corner positions inside the moving mold base plate 4. A reserved hole 41 is opened at the middle position inside the moving mold base plate 4. An ejector pin 32 is fixed at the middle position on the side of the bottom plate 3 near the moving mold base plate 4. An electric push rod 33 is fixedly installed on one side of the bottom plate 3 below the ejector pin 32. One end of the guide pin 31 is fixedly connected to one side of the fixed mold base plate 1. The other end of the guide pin 31 is fixedly connected to one side of the bottom plate 3. The output end of the electric push rod 33 is fixedly connected to one side of the moving mold base plate 4. The central axis of the ejector pin 32 and the reserved hole 41 are collinear.

[0024] The process of recycling plastic waste involves melting it using an injection molding machine, then moving the nozzle of the injection molding machine to the inside of the positioning ring 11 so that the nozzle fits against the positioning ring 11. The injection molding machine injects the molten plastic into the cavity 71 under high pressure. After cooling and solidification, the electric push rod 33 is activated. The electric push rod 33 drives the moving mold base plate 4 to slide outside the guide post 31, allowing the punch 6 and the die 7 to open. After the mold opening is completed, the electric push rod 33 continues to retract, which will drive the moving mold base plate 4 to move towards the base plate 3, so that one end of the ejector pin 32 passes through the reserved hole 41 and abuts against one end of the reset plate 84. The ejector pin 32 will push the reset plate 84 to move inside the movable cavity 82, so that the reset plate 84 drives the ejector plate 81 to move to the outside of the punch 6 through the connecting rod 85, thereby causing the ejector plate 81 to eject the shell at one end of the punch 6, completing the demolding process.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plastic shell molding die, comprising a fixed mold base plate (1); Its features are: A movable mold base plate (4) is provided on one side of the fixed mold base plate (1), a base plate (3) is provided on the side of the movable mold base plate (4) away from the fixed mold base plate (1), a cooling structure (2) is provided above the movable mold base plate (4), and a fixing structure (5) is evenly installed on one side of the fixed mold base plate (1) and the movable mold base plate (4). A die (7) is provided on the outside of the fixed structure (5) on one side of the fixed mold base plate (1), and a punch (6) is provided on the outside of the fixed structure (5) on one side of the moving mold base plate (4). A demolding structure (8) is provided inside the punch (6). A sliding groove (9) is provided on the side of the punch (6) and the die (7) near the fixed structure (5). A positioning groove (91) is provided on one side of the sliding groove (9). The fixed structure (5) includes a slide rail (51) disposed on one side of the fixed mold base plate (1) and the moving mold base plate (4). The slide rail (51) has mounting grooves (52) on both sides inside. The mounting grooves (52) are all provided with bolts (521). The slide rail (51) has a movable groove (56) at the middle position. The movable groove (56) inside the slide rail (51) has a connecting groove (53) at the top. The movable groove (56) inside the movable groove (56) has a positioning block (54). The positioning block (54) inside the movable groove (56) has a first return spring (55) on both sides at the bottom end. The positioning block (54) has a first limiting groove (541) on both sides at the bottom end. The movable groove (56) inside the slide rail (51) has a second limiting groove (561) on both sides at the bottom end.

2. A plastic shell forming mold according to claim 1, wherein: A positioning ring (11) is fixed at the middle position on one side of the fixed mold base plate (1). An injection channel (12) is opened at the middle position inside the fixed mold base plate (1). A cavity (71) is opened on one side inside the cavity (7). An venting groove (72) is opened on the side of the top of the cavity (71) away from the fixed mold base plate (1). One end of the injection channel (12) extends into the cavity (7) and communicates with the cavity (71). The bottom end of the venting groove (72) is connected to the cavity (71).

3. A plastic shell forming mold according to claim 1, wherein: The cooling structure (2) includes a fixed rod (21) disposed above the moving mold base plate (4). An adjustment groove (22) is provided on one side of the fixed rod (21). A stud (24) passes through the interior of the adjustment groove (22). A nut (23) is threaded on the outer side of the stud (24) at the top of the fixed rod (21). A water distribution seat (25) is fixed at the bottom of the stud (24). A water inlet pipe (26) is fixed at one end of the water distribution seat (25). Spray nozzles (27) are uniformly fixed at the bottom of the water distribution seat (25). Limit blocks (28) are fixed on both sides of the fixed rod (21) at the top of the water distribution seat (25).

4. A plastic shell forming mold according to claim 3, wherein: One end of the fixing rod (21) is fixedly connected to one side of the top of the fixed mold base plate (1), and the other end of the fixing rod (21) is fixedly connected to one side of the top of the base plate (3). The adjusting groove (22) is located directly above the concave mold (7). The water inlet pipe (26) and the nozzle (27) are connected through the water distribution seat (25).

5. A plastic shell forming mold according to claim 1, wherein: Guide pins (31) are inserted through the corners inside the moving mold base plate (4). A reserved hole (41) is opened in the middle of the moving mold base plate (4). An ejector pin (32) is fixed in the middle of the side of the base plate (3) near the moving mold base plate (4). An electric push rod (33) is fixedly installed on one side of the base plate (3) below the ejector pin (32). One end of the guide pin (31) is fixedly connected to one side of the fixed mold base plate (1). The other end of the guide pin (31) is fixedly connected to one side of the base plate (3). The output end of the electric push rod (33) is fixedly connected to one side of the moving mold base plate (4). The central axis of the ejector pin (32) and the reserved hole (41) are collinear.

6. A plastic shell molding die according to claim 1, characterized in that: Both ends of the slide rail (51) are chamfered. One end of the bolt (521) passes through the slide rail (51) and extends into the interior of the fixed mold base plate (1) and the moving mold base plate (4) respectively. The top end of the positioning block (54) passes through the connecting groove (53) and extends into the interior of the positioning groove (91). The slide rail (51) forms a sliding structure with the punch (6) and the die (7) respectively through the sliding groove (9).

7. A plastic shell molding die according to claim 1, characterized in that: The top end of the first reset spring (55) extends into the interior of the first limiting groove (541), and the bottom end of the first reset spring (55) extends into the interior of the second limiting groove (561).

8. A plastic shell molding die according to claim 1, characterized in that: The demolding structure (8) includes a movable cavity (82) disposed inside the punch (6). A second return spring (83) is disposed inside the movable cavity (82). A connecting rod (85) passes through the inside of the second return spring (83). A reset plate (84) is fixed to one end of the connecting rod (85), and an ejector plate (81) is fixed to the other end of the connecting rod (85) outside the punch (6).

9. A plastic shell molding die according to claim 8, characterized in that: The ejector plate (81) is located inside the punch (6) on the side close to the die (7), and the connecting rod (85) and the reserved hole (41) are collinear.

10. A plastic shell molding die according to claim 8, characterized in that: The reset plate (84) is located at one end inside the movable cavity (82), and the reset plate (84) and the punch (6) form a telescopic structure through the second reset spring (83).

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