A movable core-pulling mechanism for the front mold of a transparent product

Abstract

The present invention discloses a movable core-pulling mechanism for a front mold of a transparent product, comprising a fixed mold central core, a fixed mold movable core, a push plate, a first movable mold core, and a second movable mold core; the push plate and the fixed mold movable core are arranged on the fixed mold central core and can move relative to each other; a pull rod is provided between the movable mold plate and the push plate; during the mold opening process, after the movable mold plate moves a second set distance, the movable mold plate pulls the push plate to move via the pull rod, so that the push plate pushes the product and the fixed mold movable core to move toward one side of the movable mold plate; after the push plate moves the first set distance, the fixed mold movable core stops moving, the pull rod continues to pull and move, and pushes the product to continue moving, so that the product is separated from the fixed mold cavity. The movable core-pulling mechanism for a front mold of a transparent product disclosed by the present invention can move with the product during the mold opening process, so that the product can be demolded again after being separated from the mold cavity by a certain distance. The structure is novel, safe and reliable in production, and has a simple structure and a reasonable layout.

Description

Technical Field

[0001] The invention relates to the technical field of molds, in particular to a movable core-pulling mechanism for a front mold of a transparent product. Background Art

[0002] For products with demanding appearance requirements, especially transparent ones, residual gate and ejection marks on the surface will affect the product's appearance quality. Therefore, for such products, the gate location can usually only be set on the inside of the product. When the clamping force of the product in the fixed mold is strong, the product will remain in the fixed mold after injection molding. The product must be removed from the fixed mold cavity manually or by ejection. This results in low production efficiency and high defective product rates. Especially for products with an undercut shape in the center, conventional forced demolding methods can also cause deformation and scratches on the product surface, making it difficult to meet customer product requirements. Summary of the Invention

[0003] In view of the above problems, the present invention proposes a movable core-pulling mechanism for a front mold of a transparent product.

[0004] The technical means adopted in the present invention are as follows:

[0005] A movable core-pulling mechanism for a front mold of a transparent product, comprising a fixed mold central core, a fixed mold movable core, a push plate, a first movable mold core, and a second movable mold core;

[0006] The central core of the fixed mold is fixedly mounted on the fixed mold plate, and a fixed mold cavity is provided on the central core of the fixed mold;

[0007] The movable core of the fixed mold is arranged in the fixed mold cavity, and the movable core of the fixed mold can move a first set distance relative to the central core of the fixed mold toward the movable mold plate;

[0008] The push plate is installed in the push plate installation groove of the fixed template;

[0009] The first dynamic mold core is installed on the dynamic mold plate, and a dynamic mold cavity is provided in the first dynamic mold core;

[0010] The second dynamic model core is installed in the dynamic model cavity;

[0011] A pull rod is provided between the movable plate and the push plate;

[0012] When the mold is closed, the fixed mold cavity and the movable mold cavity are buckled together to form a product cavity;

[0013] When the mold is opened, after the movable platen moves away from the fixed platen by a second set distance, the movable platen can pull the push platen toward the movable platen through the pull rod, so that the push platen pushes the product in the product cavity and the movable core of the fixed mold toward the movable platen together;

[0014] When the push plate moves toward the movable template by the first set distance, the movable core of the fixed mold is limited to stop moving by the center core of the fixed mold, and the pull rod continues to pull the push plate toward the movable template, so that the push plate pushes the product to continue moving toward the movable template, so that the product is separated from the fixed mold cavity.

[0015] Furthermore, a fixed mold movable core mounting groove is provided at the bottom of the fixed mold cavity, and pin slide grooves are provided on both side walls of the fixed mold movable core mounting groove. The fixed mold movable core is arranged in the fixed mold movable core mounting groove, and pins are provided on both sides of the fixed mold movable core. The other end of the pin is arranged in the pin slide groove. The fixed mold movable core can move in the fixed mold movable core mounting groove and its movement distance is limited by the pin slide groove.

[0016] Furthermore, a first limiting screw is provided between the movable core of the fixed mold and the central core of the fixed mold, and a first limiting screw through hole is provided on the movable core of the fixed mold. The first limiting screw passes through the first limiting screw through hole and is connected to the central core of the fixed mold, and the movable core of the fixed mold can move relative to the first limiting screw.

[0017] Furthermore, a polyurethane spring is provided on the side of the push plate facing the first dynamic mold core. When the mold is closed, the first dynamic mold core squeezes the polyurethane spring so that the polyurethane spring pushes the push plate to abut against the push plate mounting groove.

[0018] Furthermore, a pull rod slot is provided on the movable template, and a pull rod through hole is provided in the first movable template core. The pull rod is placed in the pull rod slot and one end passes through the pull rod through hole and is connected to the push plate. When the movable template moves away from the fixed template, the head of the pull rod can move in the pull rod slot.

[0019] Furthermore, a limit block is provided in the pull rod sliding groove.

[0020] Furthermore, a guide column is provided on the fixed template, and a push plate guide hole and a movable model core clearance hole are respectively provided on the push plate and the first movable model core. One end of the guide column is fixed on the fixed template, and the other end passes through the push plate guide hole and is inserted into the movable model core clearance hole.

[0021] Furthermore, a second limiting screw is provided between the fixed template and the push plate.

[0022] Furthermore, the glue injection port is arranged on the fixed template.

[0023] Compared with the prior art, the movable core-pulling mechanism of the transparent product front mold disclosed in the present invention has the following beneficial effects: due to the provision of a fixed mold center core, a fixed mold movable core and a push plate structure, and the movable mold plate and the push plate are connected by a pull rod, so that when the mold is opened, the movable mold plate can pull the push plate in the process of moving away from the movable mold plate, thereby conveniently separating the product from the cavity, that is, a movable core is designed at the center undercut of the fixed mold, which can move with the product during the mold opening process, so that the product can be separated from the cavity for a certain distance before being demolded for the second time. This structure is novel, safe and reliable in production, ensures the appearance requirements of the glossy surface of the transparent product, improves product quality, and has a simple structure and a reasonable layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of a mold with a movable core-pulling mechanism for a transparent product front mold disclosed in the present invention in a mold-closing state;

[0025] Figure 2 It is a schematic diagram of a mold having a movable core-pulling mechanism for a transparent product front mold disclosed in the present invention after the movable mold plate has moved a distance L2 away from the fixed mold plate;

[0026] Figure 3 It is a schematic diagram of a mold having a movable core-pulling mechanism for a transparent product front mold disclosed in the present invention after the movable mold plate has moved a distance L1+L2 away from the fixed mold plate;

[0027] Figure 4 It is a schematic diagram of a mold product being demoulded with the movable core-pulling mechanism for the front mold of a transparent product disclosed in the present invention;

[0028] Figure 5 It is the structural diagram of the product cavity;

[0029] Figure 6 This is the structural diagram of the fixed mold center core;

[0030] In the figure: 1, fixed mold center core; 10, fixed mold cavity; 11, fixed mold movable core mounting slot; 12, pin slide slot; 13, pin; 14, first limit screw;

[0031] 2. Fixed mold movable core; 20. First limit screw through hole;

[0032] 3. Push plate; 30. Polyurethane spring; 31. Polyurethane spring mounting slot; 32. Push plate guide hole;

[0033] 4. First moving mold core; 40. Moving mold cavity; 41. Pull rod through hole; 42. Moving mold core clearance hole;

[0034] 5. The second moving model core;

[0035] 6. Fixed template; 60. Push plate mounting slot; 61. Guide column; 62. Second limit screw;

[0036] 7. Moving template; 70. Tie rod slide; 71. Limit block;

[0037] 8. Pull rod;

[0038] 9. Finished products. DETAILED DESCRIPTION

[0039] like Figure 1 、 Figure 2 and Figure 3 The figure shows a movable core-pulling mechanism for a transparent product front mold disclosed in the present invention, comprising a fixed mold central core 1, a fixed mold movable core 2, a push plate 3, a first movable mold core 4, and a second movable mold core 5;

[0040] The fixed mold center core 1 is fixedly mounted on the fixed mold plate 6, the fixed mold center core 1 is provided with a fixed mold cavity 10, and the glue injection port is provided on the fixed mold plate 6;

[0041] The movable core 2 of the fixed mold is arranged in the fixed mold cavity 10, and the movable core 2 of the fixed mold can move a first set distance relative to the central core 1 of the fixed mold toward the movable mold plate 7; in this embodiment, as Figure 6 As shown, a fixed mold movable core mounting groove 11 is provided at the bottom of the fixed mold cavity 10, and pin slide grooves 12 are provided on both side walls of the fixed mold movable core mounting groove 11. The fixed mold movable core 2 is arranged in the fixed mold movable core mounting groove 11, and pins 13 are provided on both sides of the fixed mold movable core 2. The other end of the pin 13 is arranged in the pin slide groove 12. The fixed mold movable core 2 can move in the fixed mold movable core mounting groove 11 and its movement distance is limited by the pin slide groove 12. The movement distance is the first set distance L1;

[0042] The push plate 3 is installed in the push plate installation groove 60 of the fixed template 6;

[0043] The first dynamic mold core 4 is mounted on the dynamic mold plate 7, and a dynamic mold cavity 40 is provided in the first dynamic mold core 4;

[0044] The second dynamic model core 5 is installed in the dynamic model cavity 40, and the second dynamic model core 5 is fixedly connected to the first dynamic model core by screws;

[0045] A tie rod 8 is provided between the movable plate 7 and the push plate 3; specifically, a tie rod slot 70 is provided on the movable plate 7, and a tie rod through hole 41 is provided in the first movable mold core 4. The tie rod 8 is placed in the tie rod slot 70 and one end passes through the tie rod through hole 41 and is connected to the push plate 3. The length of the tie rod 8 is greater than the distance between the tie rod slot and the push plate when the mold is closed, so that when the movable plate 7 moves away from the fixed plate 6, the head of the tie rod 8 can move in the tie rod slot 70;

[0046] When the mold is closed, the fixed mold cavity 10 and the movable mold cavity 40 are buckled together to form a product cavity, and the casting material can be injected into the product cavity through the injection port to form the product;

[0047] When the mold is opened, after the movable platen 7 moves away from the fixed platen 6 by a second set distance L2, which is the distance between the tie rod head and the bottom of the tie rod slot when the mold is closed, the movable platen 7 can pull the push plate 3 toward the movable platen 7 through the tie rod 8, so that the push plate 3 pushes the product 9 in the product cavity and the movable core 2 of the fixed mold toward the movable platen 7 together;

[0048] When the push plate 3 moves the first set distance toward the side of the movable template 7, the movable core 2 of the fixed mold is limited and stops moving by the central core 1 of the fixed mold, and the pull rod 8 continues to pull the push plate 3 toward the side of the movable template 7, so that the push plate 3 pushes the product 9 to continue to move toward the side of the movable template 7, so that the product 9 is separated from the fixed mold cavity 10.

[0049] The process of demoulding a product using a mold having the transparent product front mold movable core-pulling mechanism disclosed in the present invention is as follows:

[0050] like Figure 1 As shown, the mold is in the closed state. At this time, glue is injected into the product cavity from the glue injection port to form the product. Figure 5 As shown, the product is in an inverted shape, and all its surfaces are glossy surfaces;

[0051] like Figure 2 As shown in the figure, during the mold opening process, the movable platen drives the first movable mold core and the second movable mold core to move away from the fixed mold plate (in the direction indicated by the arrow A in the figure) by a second set distance L2. At this stage, since the head of the tie rod does not abut against the movable platen, the push plate, the product, the movable core of the fixed mold and the tie rod are in a stationary state, and the product is separated from the movable mold cavity.

[0052] like Figure 3As shown, when the movable platen continues to move away from the fixed platen, the head of the pull rod contacts the limit block installed in the movable platen, and pulls the push plate, the product and the movable core of the fixed mold together to move away from the fixed platen through the pull rod, and the central core of the fixed mold remains stationary. During this process, the push plate pushes the end of the product so that the product is gradually separated from the central core of the fixed mold. When the push plate moves a first set distance L1 relative to the central core of the fixed mold (at this time, as shown in the figure, the total movement distance of the movable platen relative to the fixed platen is L1+L2), the pins on both sides of the movable core of the fixed mold contact the bottom edge of the pin slot on the central core of the fixed mold and are limited.

[0053] like Figure 4 As shown, after the movable core of the fixed mold is limited and stopped by the center core of the fixed mold, the movable mold plate continues to pull the push plate to move away from the fixed mold plate through the pull rod. At this time, the push plate pushes the product out of the fixed mold cavity, completing the demoulding of the product.

[0054] The transparent product front mold movable core pulling mechanism disclosed in the present invention is provided with a fixed mold center core, a fixed mold movable core and a push plate structure, and the movable mold plate and the push plate are connected by a pull rod. When the mold is opened, the movable mold plate can pull the push plate in the process of moving away from the movable mold plate, thereby conveniently separating the product from the cavity. That is, a movable core is designed at the undercut of the fixed mold center, and can move with the product during the mold opening process, so that the product can be demolded for a second time after being separated from the cavity for a certain distance. This structure is novel, safe and reliable in production, ensures the appearance requirement of the glossy surface of the transparent product, and improves the product quality. It is particularly suitable for promotion and application in this field, and its market prospects are very broad. It also has a simple structure and a reasonable layout.

[0055] Furthermore, a first limiting screw 14 is provided between the fixed mold movable core 2 and the fixed mold center core 1, and a first limiting screw through hole 20 is provided on the fixed mold movable core 2. The first limiting screw through hole 20 is a stepped hole, and the aperture of the side close to the first limiting screw head is larger than the first limiting screw head. The first limiting screw 14 passes through the first limiting screw through hole 20 and is connected to the fixed mold center core 1. The fixed mold movable core 2 can move relative to the first limiting screw 14. The first limiting screw can limit and fix the fixed mold movable core to prevent the fixed mold movable core from falling off during the operation of the mold.

[0056] Furthermore, a polyurethane spring 30 is provided on the side of the push plate 3 facing the first dynamic mold core 4. When the mold is closed, the first dynamic mold core 4 squeezes the polyurethane spring 30, so that the polyurethane spring 30 pushes the push plate 3 to abut against the push plate mounting groove 60. Specifically, a polyurethane spring mounting groove is provided on one side of the groove-shaped dynamic mold plate of the push plate 3. The polyurethane spring 30 is fixed in the polyurethane spring mounting groove by screws. The length of the polyurethane spring 30 is slightly larger than the depth of the polyurethane spring mounting groove, so that when the mold is closed, the first dynamic mold core can squeeze the polyurethane spring 30. The polyurethane spring 30 is compressed to squeeze the push plate against the push plate mounting groove 60. The provision of the polyurethane spring can release the spring pressure at the moment the mold is opened, and can push the push plate and the related components of the center fixed mold movable core to avoid the movable core assembly (push plate and fixed mold movable core) from moving in position when the mold is opened.

[0057] Furthermore, a limit block 71 is provided in the pull rod slide groove 70 to adjust the pull rod mold opening stroke and improve the mold stability and mold life.

[0058] Furthermore, a guide column 61 is provided on the fixed template 6, and a push plate guide hole 32 and a movable model core clearance hole 42 are respectively provided on the push plate 6 and the first movable model core 4. One end of the guide column 61 is fixed on the fixed template 6, and the other end passes through the push plate guide hole 32 and is inserted into the movable model core clearance hole 42, which can ensure that the push plate runs smoothly and reliably during the movement.

[0059] Furthermore, a second limiting screw 62 is provided between the fixed mold plate 6 and the push plate 3. The second limiting screw can limit the movement stroke of the push plate, ensure that the product is completely separated from the cavity and prevent the push plate from separating from the fixed mold plate.

[0060] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A movable core-pulling mechanism for a transparent product front mold, characterized by: It includes a fixed mold center core, a fixed mold movable core, a push plate, a first movable mold core and a second movable mold core; The central core of the fixed mold is fixedly mounted on the fixed mold plate, and a fixed mold cavity is provided on the central core of the fixed mold; The movable core of the fixed mold is arranged in the fixed mold cavity, and the movable core of the fixed mold can move a first set distance relative to the central core of the fixed mold toward the movable mold plate; The push plate is installed in the push plate installation groove of the fixed template; The first dynamic mold core is installed on the dynamic mold plate, and a dynamic mold cavity is provided in the first dynamic mold core; The second dynamic model core is installed in the dynamic model cavity; A pull rod is provided between the movable plate and the push plate; When the mold is closed, the fixed mold cavity and the movable mold cavity are buckled together to form a product cavity; When the mold is opened, after the movable platen moves away from the fixed platen by a second set distance, the movable platen can pull the push platen toward the movable platen through the pull rod, so that the push platen pushes the product in the product cavity and the movable core of the fixed mold toward the movable platen together; When the push plate moves toward the movable platen by the first set distance, the movable core of the fixed mold is limited by the central core of the fixed mold and stops moving, and the pull rod continues to pull the push plate toward the movable platen, so that the push plate pushes the product to continue moving toward the movable platen, so that the product is separated from the fixed mold cavity; A fixed mold movable core mounting groove is provided at the bottom of the fixed mold cavity, and pin slide grooves are provided on both side walls of the fixed mold movable core mounting groove. The fixed mold movable core is arranged in the fixed mold movable core mounting groove, and pins are provided on both sides of the fixed mold movable core. The other end of the pin is arranged in the pin slide groove. The fixed mold movable core can move in the fixed mold movable core mounting groove and its moving distance is limited by the pin slide groove.

2. The movable core-pulling mechanism for the front mold of a transparent product according to claim 1, characterized in that: A first limiting screw is further provided between the movable core of the fixed mold and the central core of the fixed mold. A first limiting screw through hole is provided on the movable core of the fixed mold. The first limiting screw passes through the first limiting screw through hole and is connected to the central core of the fixed mold. The movable core of the fixed mold can move relative to the first limiting screw.

3. The movable core-pulling mechanism for the front mold of a transparent product according to claim 1 or 2, characterized in that: A polyurethane spring is further provided on the push plate on the side facing the first movable mold core. When the mold is closed, the first movable mold core squeezes the polyurethane spring so that the polyurethane spring pushes the push plate to abut against the push plate mounting groove.

4. The movable core-pulling mechanism for the front mold of a transparent product according to claim 3, characterized in that: A pull rod slot is provided on the movable template, and a pull rod through hole is provided in the first movable template core. The pull rod is placed in the pull rod slot and one end passes through the pull rod through hole and is connected to the push plate. When the movable template moves away from the fixed template, the head of the pull rod can move in the pull rod slot.

5. The movable core-pulling mechanism for the front mold of a transparent product according to claim 4, characterized in that: A limiting block is also provided in the pull rod sliding groove.

6. The movable core-pulling mechanism for the front mold of a transparent product according to claim 5, characterized in that: The fixed template is also provided with a guide column, and the push plate and the first dynamic model core are respectively provided with a push plate guide hole and a dynamic model core clearance hole. One end of the guide column is fixed on the fixed template, and the other end passes through the push plate guide hole and is inserted into the dynamic model core clearance hole.

7. The movable core-pulling mechanism for the front mold of a transparent product according to claim 1, characterized in that: A second limiting screw is further provided between the fixed template and the push plate.

8. The movable core-pulling mechanism for the front mold of a transparent product according to claim 1, characterized in that: The glue injection port is arranged on the fixed template.

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