Movable mold plate structure for multi-component injection molding machine

Abstract

The present invention relates to the field of injection molding machines, and discloses a movable mold plate structure for a multi-component injection molding machine, the movable mold plate structure comprises a movable mold plate (1), the rear end surface of the movable mold plate (1) is provided with concave cavities (2) at the two sides, the upper and lower ends of the concave cavities (2) are provided with connecting rod frames (3), a pulling plate (4) is arranged between the two connecting rod frames (3), and the middle part of the plate surface of the pulling plate (4) is provided with a gap (5). According to the movable mold plate structure for the multi-component injection molding machine, the pulling plate (4) connected between the two connecting rod frames (3) can improve the overall rigidity of the movable mold plate (1), through the concave cavity (2) and the notch (5) in the middle of the pulling plate (4), the rigidity of the movable mold plate (1) can be guaranteed, the weight of the movable mold plate (1) can be reduced, and therefore the utilization rate of materials for manufacturing the movable mold plate (1) is improved, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of injection molding machines, in particular to a movable template structure for a multi-component injection molding machine. Background Art

[0002] An injection molding machine that can realize the injection molding of multiple raw materials is called a multi-component injection molding machine. In recent years, with the expansion of demand for various types of injection molding products, the application of multi-component injection molding machines has become increasingly widespread, the competitive pressure in the industry has also increased, and the functional configuration requirements have become increasingly higher. As one of the core mechanisms of a multi-component injection molding machine, the two-plate mechanism of the clamping part mainly includes a movable mold plate, a turntable arranged at the front end of the movable mold plate, a driving mechanism for driving the turntable to rotate, and a ejecting mechanism for ejecting the molded parts in the mold cavity. For example, the invention patent with announcement number CN108890962A discloses a similar clamping device.

[0003] The above-mentioned mold clamping device has a relatively heavy movable mold plate as a whole, and a low material utilization rate, which leads to an increase in production costs, and thus needs to be improved. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a movable template structure for a multi-component injection molding machine. Through the concave cavity at the rear end of the movable template and the notch on the pull plate, the rigidity of the movable template can be ensured and its weight can be reduced, thereby improving material utilization and reducing production costs.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] A movable template structure for a multi-component injection molding machine includes a movable template, a rear end face of the movable template and positions on both sides thereof are provided with concave cavities, connecting rod frames are provided at the upper and lower ends of the concave cavities, a pull plate is provided between the two connecting rod frames, and a notch is provided in the middle of the plate surface of the pull plate.

[0007] By adopting the above scheme, the pull plate connected between the two connecting rod frames can improve the overall rigidity of the dynamic template. Through the concave cavity and the notch in the middle of the pull plate, the rigidity of the dynamic template can be guaranteed and its weight can be reduced, thereby improving the material utilization rate of manufacturing the dynamic template and reducing production costs.

[0008] Preferably, a groove is provided at the front end of the movable template, and a turntable is rotatably arranged in the groove.

[0009] By adopting the above solution and setting the turntable in the trench, the space occupied by the turntable can be reduced and the weight of the movable template can be further reduced, thereby further improving the material utilization rate of the movable template.

[0010] Preferably, a driving mechanism for driving the turntable to rotate is provided on the moving template, and the driving mechanism includes a plurality of side teeth arranged around the outer circumference of the turntable, a gear arranged on one side of the moving template and meshing with the side teeth, and a first power source arranged on one side of the moving template and used to drive the gear to rotate.

[0011] By adopting the above solution, the first power source can transmit power to the gears, the side teeth and the turntable in sequence, thereby driving the turntable to rotate and ensuring stability and precision during rotation.

[0012] Preferably, a limiting mechanism for locking the circumferential position of the turntable is provided on the movable template, and the limiting mechanism includes a locking plate arranged on the end surface of the turntable away from the pull plate, two locking grooves arranged on both sides of the edge of the locking plate, a locking block arranged on one side of the locking plate, and a second power source arranged on the movable template to drive the locking block to enter or leave the locking groove.

[0013] By adopting the above scheme, the locking plate can rotate with the turntable, and the locking block is driven into the locking groove on the locking plate by the second power source, so as to simultaneously complete the circumferential positioning of the locking plate and the turntable, so as to improve the stability of the turntable when it is hovering, thereby improving the injection molding accuracy of the injection molding machine.

[0014] Preferably, the pull plate is provided with a ejection mechanism on both sides of the notch for driving the injection molded workpiece off the turntable, the ejection mechanism comprising a plurality of ejectors which sequentially pass through the bottom of the groove and the turntable, and a driving assembly which is provided on the pull plate for driving the ejectors to extend and retract.

[0015] By adopting the above solution, the ejector pin is driven to extend and retract by the driving component, so that the demoulding action of the injection molded part can be effectively completed, thereby improving the working efficiency of the injection molding machine.

[0016] Preferably, the driving assembly includes an ejection guide plate arranged at the tail end of the ejector pin, and a third power source fixed to the pull plate to drive the ejection guide plate to translate forward and backward.

[0017] By adopting the above solution, the ejection guide plate is driven to move forward and backward by the third power source, so that the extension and retraction of the ejector pin can be effectively realized, thereby completing the demoulding operation of the ejection mechanism.

[0018] Preferably, a guide rod is provided between the bottom of the cavity and the pull plate and is slidably disposed through the ejection guide plate.

[0019] By adopting the above solution, the guide rod can improve the stability of the ejector guide plate and the ejector pin during translation, and further increase the efficiency and accuracy of the dynamic mold plate during demoulding.

[0020] Preferably, the driving assembly includes an ejection guide plate arranged at the tail end of the ejector pin, a screw rod rotatably arranged between the pull plate and the bottom of the cavity, a nut arranged on the ejection guide plate and threadedly engaged with the screw rod, and a power unit connected to the screw rod to drive the screw rod to rotate circumferentially; when the screw rod rotates circumferentially, it can drive the nut to translate forward and backward.

[0021] By adopting the above scheme, the power unit drives the screw to rotate, which can drive the nut on the screw and the ejector guide plate on the nut to move forward and backward, thereby realizing the extension and retraction of the ejector pin, and can greatly improve the operation accuracy and stability of the ejector pin to adapt to higher precision demolding scenarios.

[0022] Preferably, the power unit includes a driven wheel located on the side of the pull plate away from the concave cavity and connected to the screw, a driving wheel located on one side of the driven wheel, a transmission belt wound around the driving wheel and the driven wheel, and a fourth power source connected to the driving wheel to drive the driving wheel to rotate. A tensioning wheel for tightening the transmission belt is provided on the plate surface of the pull plate away from the concave cavity.

[0023] By adopting the above scheme, the belt transmission method has the advantages of high efficiency, smooth transmission, wide transmission ratio range, simple maintenance and low cost. The tensioner can improve the tightness of the fit between the transmission belt and the driving wheel and the driven wheel, thereby improving the transmission efficiency and accuracy.

[0024] Preferably, a guide rod is provided between the bottom of the cavity and the pull plate and is slidably disposed through the ejection guide plate.

[0025] By adopting the above solution, the guide rod can improve the stability of the ejector guide plate and the ejector pin during translation, and further increase the efficiency and accuracy of the dynamic mold plate during demoulding.

[0026] The present invention has significant technical effects due to the adoption of the above technical solution:

[0027] 1. The pull plate connected between the two connecting rod frames can improve the overall rigidity of the moving plate. Through the concave cavity and the notch in the middle of the pull plate, the rigidity of the moving plate can be ensured and its weight can be reduced, thereby improving the material utilization rate of the moving plate and reducing the production cost;

[0028] 2. Operators can install drive components of different structures on the pull plate according to the demoulding accuracy requirements to adapt to different working conditions and increase the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The structure of this embodiment is shown in FIG. Figure 1 ;

[0030] Figure 2 The structure of this embodiment is shown in FIG. Figure 2 ;

[0031] Figure 3 The structure of this embodiment is shown in FIG. Figure 3 ;

[0032] Figure 4 for Figure 1 An enlarged schematic diagram of section A is shown;

[0033] Figure 5 for Figure 1 An enlarged schematic diagram of portion B is shown;

[0034] Figure 6 The structure of this embodiment is shown in FIG. Figure 4 ;

[0035] Figure 7 The structure of this embodiment is shown in FIG. Figure 5 ;

[0036] Figure 8 The structure of this embodiment is shown in FIG. Figure 6 ;

[0037] Fig. 9 The structure of this embodiment is shown in FIG. Figure 7 ;

[0038] Fig.10 The structure of this embodiment is shown in FIG. Figure 8 .

[0039] The names of the parts indicated by the numerical labels in the above drawings are as follows: 1. movable template; 2. concave cavity; 3. connecting rod frame; 4. pull plate; 5. notch; 6. groove; 7. turntable; 8. side teeth; 9. gear; 10. first power source; 11. locking plate; 12. locking groove; 13. locking block; 14. second power source; 15. ejector pin; 16. drive assembly; 17. ejector guide plate; 18. third power source; 19. guide rod; 20. screw rod; 21. nut; 22. driven wheel; 23. driving wheel; 24. transmission belt; 25. fourth power source; 26. tensioner; 27. avoidance groove; 28. first ejection hole; 29. ​​second ejection hole. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0041] like Figure 1 and Figure 2As shown, the present embodiment discloses a movable plate structure for a multi-component injection molding machine, comprising a movable plate 1, a cavity 2 is provided on the rear end face of the movable plate 1 and at both sides thereof, a connecting rod frame 3 is provided at the upper and lower ends of the cavity 2, a pull plate 4 is provided between the two connecting rod frames 3, and a notch 5 is provided in the middle of the plate surface of the pull plate 4. In this way, the overall strength of the movable plate 1 can be improved, and its weight can be effectively reduced, thereby improving the material utilization rate of manufacturing the movable plate 1 and reducing the production cost.

[0042] like Figure 3 As shown, in order to further reduce the weight of the movable template 1, a circular groove 6 is provided at the front end of the movable template 1, and a turntable 7 is rotatably provided in the groove 6.

[0043] like Figure 4 As shown, in order to realize the rotation of the turntable 7, the movable plate 1 is provided with a driving mechanism for driving the turntable 7 to rotate. Specifically, the driving mechanism includes a plurality of side teeth 8 arranged around the outer circumference of the turntable 7, a gear 9 arranged on one side of the movable plate 1 and meshing with the side teeth 8, and a first power source 10 arranged on one side of the movable plate 1 and used to drive the gear 9 to rotate. The first power source 10 is preferably a motor, and its output shaft is coaxially connected to the end face center of the gear 9. The side of the movable plate 1 is provided with an avoidance groove 27 for the gear 9 to dock with the side teeth 8, so that the gear 9 can mesh with the side teeth 8 smoothly.

[0044] like Figure 5 As shown, in order to ensure the stability of the turntable 7 when it is suspended, a limiting mechanism for locking the circumferential position of the turntable 7 is provided on the movable template 1, and the limiting mechanism includes a locking plate 11 arranged on the end face of the turntable 7 away from the pull plate 4, two locking grooves 12 arranged on both sides of the edge of the locking plate 11, a locking block 13 arranged on one side of the locking plate 11, and a second power source 14 arranged on the movable template 1 to drive the locking block 13 to enter or escape from the locking groove 12. The second power source 14 is a cylinder or an oil cylinder, and its output shaft is fixed to the locking block 13 to achieve rapid extension and retraction of the locking block 13. In this embodiment, when the locking plate 11 rotates with the turntable 7 to a position where one of the locking grooves 12 is directly opposite to the locking block 13, the second power source 14 drives the locking block 13 to extend and plug into the corresponding locking groove 12, thereby completing the circumferential locking of the locking plate 11 and the turntable 7. When the turntable 7 needs to change its working position, the second power source 14 drives the locking block 13 to retract and disengage from the locking groove 12, so that the circumferential locking of the locking plate 11 and the turntable 7 can be released, so that the first power source 10 can drive the turntable 7 to continue rotating through the gear 9 and the side teeth 8.

[0045] like Figure 6 and Figure 7As shown, in order to realize the demoulding operation of the movable template 1, the pull plate 4 is provided with a material ejection mechanism for driving the injection molded workpiece to be separated from the turntable 7 on both sides of the notch 5. The material ejection mechanism includes a plurality of ejectors 15 that sequentially pass through the bottom of the groove 6 and the turntable 7, and a driving assembly 16 that is provided on the pull plate 4 to drive the ejectors 15 to extend and retract. The bottom of the groove 6 and the end surface of the turntable 7 are respectively provided with a plurality of first ejection holes 28 and a plurality of second ejection holes 29 for the ejectors 15 to slide through one by one. The second ejection holes 29 penetrate the locking plate 11 so that the ejectors 15 can smoothly pass through the locking plate 11 into the mold, thereby realizing the demoulding of the injection molded part.

[0046] In this embodiment, the driving component 16 can be implemented in two ways to adapt to different usage scenarios:

[0047] The first method, such as Figure 8 and Fig. 9 As shown, the driving assembly 16 includes an ejection guide plate 17 disposed at the tail end of the ejector pin 15 and located on the side of the pull plate 4 close to the concave cavity 2, and a third power source 18 fixed to the plate surface of the pull plate 4 away from the concave cavity 2 to drive the ejection guide plate 17 to translate forward and backward. The third power source 18 is an oil cylinder or an air cylinder, and its output shaft slides through the pull plate 4 and is fixed to the ejection guide plate 17, thereby realizing the forward and backward translation of the ejection guide plate 17.

[0048] like Fig. 9 As shown, in order to improve the stability of the ejection guide plate 17 and the ejector pin 15 during translation, a guide rod 19 is provided between the bottom of the cavity 2 and the pull plate 4 and is slidably disposed on the ejection guide plate 17 .

[0049] The second method, such as Figure 8 and Fig.10 As shown, the driving assembly 16 includes an ejection guide plate 17 arranged at the tail end of the ejector pin 15, a screw rod 20 rotatably arranged between the pull plate 4 and the bottom of the cavity 2, a nut 21 fixed to the ejection guide plate 17 and threadedly engaged with the screw rod 20, and a power unit connected to the screw rod 20 to drive the screw rod 20 to rotate circumferentially. When the screw rod 20 rotates circumferentially, it can drive the nut 21 to translate forward and backward. Specifically, the power unit includes a driven wheel 22 located on the side of the pull plate 4 away from the concave cavity 2 and connected to the screw 20, a driving wheel 23 located on one side of the driven wheel 22, a transmission belt 24 wound around the driving wheel 23 and the driven wheel 22, and a fourth power source 25 connected to the driving wheel 23 to drive the driving wheel 23 to rotate. The fourth power source 25 is preferably a motor fixed to the pull plate 4, and its output shaft is coaxially fixed to the driving wheel 23, so as to transmit power to the screw 20 through the driving wheel 23, the transmission belt 24 and the driven wheel 22, so as to realize the circumferential rotation of the screw 20. The plate surface of the pull plate 4 away from the concave cavity 2 is provided with a tensioning wheel 26 for tightening the transmission belt 24, so as to improve the tightness of the matching between the transmission belt 24 and the driving wheel 23 and the driven wheel 22, thereby improving the transmission efficiency and accuracy.

[0050] like Fig.10 As shown, in order to improve the stability of the ejection guide plate 17 and the ejector pin 15 during translation, a guide rod 19 is provided between the bottom of the cavity 2 and the pull plate 4 and is slidably disposed on the ejection guide plate 17 .

[0051] In this embodiment, the operator can install driving components 16 of different structural forms on the pulling plate 4 according to the demoulding accuracy requirements to adapt to different working conditions and increase the scope of application.

[0052] A linear rail (not shown) is installed below the movable platen 1 to achieve forward and backward translation of the movable platen 1 , which is common knowledge in the art and will not be elaborated herein.

Claims

1. A movable platen structure for a multi-component injection molding machine, comprising a movable platen (1), characterized in that: A cavity (2) is provided on the rear end face and on both sides of the movable template (1), connecting rod frames (3) are provided at the upper and lower ends of the cavity (2), a pull plate (4) is provided between the two connecting rod frames (3), and a notch (5) is provided in the middle of the plate surface of the pull plate (4).

2. A movable plate structure for a multi-component injection molding machine according to claim 1, characterized in that: A groove (6) is provided at the front end of the movable template (1), and a rotating disk (7) is rotatably arranged in the groove (6).

3. A movable plate structure for a multi-component injection molding machine according to claim 2, characterized in that: The movable platen (1) is provided with a driving mechanism for driving the rotating disk (7) to rotate. The driving mechanism comprises a plurality of side teeth (8) arranged around the outer peripheral surface of the rotating disk (7), a gear (9) arranged on one side of the movable platen (1) and meshing with the side teeth (8), and a first power source (10) arranged on one side of the movable platen (1) and used for driving the gear (9) to rotate.

4. A movable plate structure for a multi-component injection molding machine according to claim 2, characterized in that: The movable plate (1) is provided with a limiting mechanism for locking the circumferential position of the rotating plate (7), the limiting mechanism comprising a locking plate (11) arranged on the end surface of the rotating plate (7) away from the pull plate (4), two locking grooves (12) arranged on both sides of the edge of the locking plate (11), a locking block (13) arranged on one side of the locking plate (11), and a second power source (14) arranged on the movable plate (1) to drive the locking block (13) to enter or leave the locking groove (12).

5. A movable plate structure for a multi-component injection molding machine according to claim 2, 3 or 4, characterized in that: The pull plate (4) is provided with a material ejection mechanism on both sides of the notch (5) for driving the injection molded workpiece to separate from the turntable (7), and the material ejection mechanism comprises a plurality of ejector pins (15) which sequentially pass through the bottom of the groove (6) and the turntable (7), and a driving assembly (16) which is provided on the pull plate (4) to drive the ejector pins (15) to extend and retract.

6. A movable plate structure for a multi-component injection molding machine according to claim 5, characterized in that: The driving assembly (16) comprises an ejection guide plate (17) arranged at the rear end of the ejector pin (15), and a third power source (18) fixed to the pull plate (4) to drive the ejection guide plate (17) to move forward and backward.

7. A movable platen structure for a multi-component injection molding machine according to claim 6, characterized in that: A guide rod (19) is arranged between the bottom of the concave cavity (2) and the pull plate (4) and is slidably arranged on the ejection guide plate (17).

8. The movable plate structure for a multi-component injection molding machine according to claim 5, characterized in that: The driving assembly (16) comprises an ejection guide plate (17) arranged at the rear end of the ejector pin (15), a screw rod (20) rotatably arranged between the pull plate (4) and the bottom of the cavity (2), a nut (21) arranged on the ejection guide plate (17) and threadedly engaged with the screw rod (20), and a power unit connected to the screw rod (20) to drive the screw rod (20) to rotate circumferentially; when the screw rod (20) rotates circumferentially, it can drive the nut (21) to translate forward and backward.

9. A movable platen structure for a multi-component injection molding machine according to claim 8, characterized in that: The power unit comprises a driven wheel (22) located on a side of the pull plate (4) away from the concave cavity (2) and connected to the screw rod (20), a driving wheel (23) located on one side of the driven wheel (22), a transmission belt (24) wound around the driving wheel (23) and the driven wheel (22), and a fourth power source (25) connected to the driving wheel (23) to drive the driving wheel (23) to rotate. A tensioning wheel (26) for tightening the transmission belt (24) is provided on the plate surface of the pull plate (4) away from the concave cavity (2).

10. A movable platen structure for a multi-component injection molding machine according to claim 8, characterized in that: A guide rod (19) is arranged between the bottom of the concave cavity (2) and the pull plate (4) and is slidably arranged on the ejection guide plate (17).

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