Mold structure convenient to open and close

Abstract

The utility model relates to the technical field of injection molds, in particular to a mold structure convenient to open and close, which comprises a movable mold, a fixed mold and a driving structure, the movable mold comprises an upper mold core, a lower mold core and an injection molding template, and the driving structure is used for driving the upper mold core and the lower mold core to synchronously get close to or away from the injection molding template. An injection molding cavity is formed among the upper mold core, the lower mold core and the injection molding template, an injection molding hole communicated with the injection molding cavity is formed in the injection molding template, and a molding block inserted into the injection molding cavity is arranged on the fixed mold. The problem that an existing mold structure is inconvenient to open and close is effectively solved; according to the utility model, the slide way and the slide rod which are obliquely arranged are adopted, and the contact surfaces of the upper mold core, the lower mold core and the injection molding template are inclined surfaces, so that the upper mold core and the lower mold core can be contacted in place at the last moment of the sliding glue sealing inclined surface, the abrasion of a glue sealing position is reduced, and the production life of the mold is greatly prolonged; and the maintenance cost is greatly saved for production enterprises.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a mold structure which is easy to open and close. Background Art

[0002] During the injection molding process of plastic products, a Haver slide mechanism is sometimes used in mold design. However, the existing Haver slide mechanism generally uses an inclined guide column mechanism and related hydraulic or pneumatic cylinders to cause the mold to retract, preventing the mold from opening during the injection molding process. When the mold is opened, a hydraulic or pneumatic cylinder is used to open it, resulting in low opening and closing efficiency. In addition, the existing mold requires a push rod to eject the molded plastic product during the mold opening process. During the ejection process, if the flash of the product and the mold are not cooled properly, the plastic product may be easily damaged. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a mold structure that is easy to open and close, which effectively solves the problem that the existing mold structure is not easy to open and close.

[0004] The technical solution solved by the present utility model is a mold structure that is easy to open and close, including a movable mold, a fixed mold and a driving structure. The movable mold includes an upper mold core, a lower mold core and an injection mold plate. The driving structure is used to drive the upper mold core and the lower mold core to synchronously approach or move away from the injection mold plate. An injection cavity is formed between the upper mold core, the lower mold core and the injection mold plate. An injection hole connected to the injection cavity is opened on the injection mold plate, and a molding block inserted into the injection cavity is provided on the fixed mold.

[0005] Preferably, the upper mold core is provided with an inward-retracted stepped surface, and the lower mold core is provided with an outward-convex stepped surface that is convex and engages with the inward-retracted stepped surface of the upper mold core.

[0006] Preferably, cooling channels are provided in the upper mold core and the lower mold core.

[0007] Preferably, the driving structure includes a slide, a sliding rod, a spring and a guide assembly. The slides are in two groups and are evenly arranged on the upper mold core and the lower mold core. The two groups of slides are distributed in an inverted eight shape. The sliding rod is inserted into the slide and slidably connected to the slide via the spring.

[0008] Preferably, the guide assembly includes a guide block and a guide groove. The guide block is arranged on the side of the movable mold and fixed relative to the injection mold plate by bolts. The guide groove is opened on the side walls of the upper mold core and the lower mold core and is parallel to the slideway. The guide groove is used to accommodate the guide block.

[0009] Preferably, it also includes a locking structure, which is used to limit the position of the movable mold and the fixed mold after mold closing. The locking structure includes an auxiliary groove, a first step block and a second step block. The auxiliary groove is opened on the fixed mold to accommodate the first step block, and the second step block is inserted into the auxiliary groove and can engage with the first step block.

[0010] Preferably, a wear-resistant pad is further provided on the outer side of the movable mold.

[0011] The beneficial effects of the utility model are:

[0012] The utility model adopts the setting of inclined slideway and slide rod, and the contact surfaces of the upper mold core, the lower mold core and the injection mold plate are all inclined surfaces, so that the upper mold core and the lower mold core can be in contact with each other at the last moment of sliding the sealing inclined surface, which reduces the wear of the sealing part, greatly improves the service life of the mold production, and saves a lot of maintenance costs for the production enterprise;

[0013] Moreover, the three rear molds of the upper mold core, the lower mold core and the injection mold plate in the utility model can save molding time. After the rear mold is opened, the edges can be automatically removed, which improves the problem of easy adhesion of existing liquid burrs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cutaway top view of the three-dimensional structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the cutaway main perspective structure of the present invention;

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of the utility model after removing the fixed mold;

[0018] Figure 5 This is a schematic diagram of the three-dimensional structure of the utility model when the mold is opened;

[0019] Figure 6 This is a schematic diagram of the cutaway three-dimensional structure of the utility model when the mold is opened;

[0020] Figure 7 This is a schematic diagram of the exploded upward-looking three-dimensional structure of the utility model;

[0021] In the figure, 1-upper mold core; 2-lower mold core; 3-injection template; 4-injection cavity; 5-injection hole; 6-molding block; 7-inward step surface; 8-outward convex step surface; 9-cooling channel; 10-slideway; 11-slide rod; 12-spring; 13-guide block; 14-guide groove; 15-auxiliary groove; 16-first step block; 17-second step block; 18-wear-resistant pad. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Depend on Figures 1 to 7 A mold structure that is easy to open and close is provided, including a movable mold and a fixed mold, the movable mold including an upper mold core 1, a lower mold core 2 and an injection mold plate 3, the upper mold core 1 and the lower mold core 2 can synchronously approach or move away from the injection mold plate 3, an injection cavity 4 is formed between the upper mold core 1, the lower mold core 2 and the injection mold plate 3, an injection hole 5 connected to the injection cavity 4 is opened on the injection mold plate 3, a molding block 6 inserted into the injection cavity 4 is provided on the fixed mold, the molten plastic is injected into the injection cavity 4 from the injection hole 5, and the molten plastic is shaped under the action of the fixed mold.

[0024] The upper mold core 1 is provided with an inward-retracted stepped surface 7, and the lower mold core 2 is provided with an outward-convex stepped surface 8 that convexly engages with the inward-retracted stepped surface 7 of the upper mold core 1. The cooperation between the inward-retracted stepped surface 7 and the outward-convex stepped surface 8 is used to better position and limit during the mold closing process of the upper mold core 1 and the lower mold core 2.

[0025] Cooling channels 9 are provided in the upper mold core 1 and the lower mold core 2 , and the cooling channels 9 are used to cool the plastic formed in a molten state.

[0026] The drive structure is used to drive the upper mold core 1 and the lower mold core 2 to move synchronously toward or away from the injection mold plate 3. The drive structure includes a slide 10, a slide rod 11, a spring 12 and a guide assembly. The slides 10 are divided into two groups and are evenly arranged on the upper mold core 1 and the lower mold core 2. The two groups of slides 10 are distributed in an inverted eight-shaped shape. The slides 10 are inclined so that the movable mold moves synchronously toward the injection mold plate 3 during the process of moving toward the fixed mold, so that the injection cavity 4 can be more closely fitted with the injection mold plate 3 and the molding block 6.

[0027] The slide rod 11 is inserted into the slideway 10 and is slidably connected to the slideway 10 via the spring 12. Under the action of the spring 12, the fixed mold and the movable mold can be automatically opened when the mold is opened. During the opening process, the upper mold core 1 and the lower mold core 2 are automatically opened, so that the injection-molded workpiece automatically falls off.

[0028] The guide assembly includes a guide block 13 and a guide groove 14. The guide block 13 is arranged on the side of the movable mold and is fixed relative to the injection mold plate 3 by bolts. The guide groove 14 is opened on the side wall of the upper mold core 1 and the lower mold core 2 and is parallel to the slide 10. The guide groove 14 is used to accommodate the guide block 13. The guide assembly is used to assist the movement of the upper mold core 1 and the lower mold core 2 in the movable mold.

[0029] It also includes a locking structure, which is used to limit the position of the movable mold and the fixed mold after mold closing. The locking structure includes an auxiliary groove 15, a first step block 16 and a second step block 17. The auxiliary groove 15 is opened on the fixed mold to accommodate the first step block 16. The second step block 17 is inserted into the auxiliary groove 15 and can engage with the first step block 16. The locking structure is used to limit the position between the fixed mold and the movable mold after the movable mold and the fixed mold are closed. At the same time, the auxiliary groove 15 is used to first accommodate the second step block 17. During the mold closing process, the second step block 17 moves along the auxiliary groove 15 toward the first step block 16 and engages.

[0030] A wear-resistant pad 18 is also provided on the outside of the movable mold. The wear-resistant pad 18 is made of hard rubber and is used to protect the outer edge surfaces of the upper mold core 1 and the lower mold core 2 to increase the service life of the upper mold core 1 and the lower mold core 2.

[0031] When the utility model is in use, the injection template 3 and the guide block 13 are installed on the injection molding equipment, the injection hole 5 is connected to the outlet of the molten plastic, and under the action of the slide 10, the slide bar 11 and the spring 12, the upper mold core 1 and the lower mold core 2 are on the same plane, and there is a certain gap between them and the injection template 3. When it is necessary to close the mold for injection molding, the staff starts the equipment to make the movable mold close to the fixed mold. The plane where the upper mold core 1 and the lower mold core 2 are located first contacts the fixed mold. Under the pressure of the fixed mold and the slide 10, the slide bar 11, the guide groove 14 and the Under the joint action of the guide block 13, the upper mold core 1 and the lower mold core 2 approach the injection mold plate 3 synchronously, and at the same time, the second step block 17 is inserted into the auxiliary groove 15. In the process of the upper mold core 1 and the lower mold core 2 approaching the injection mold plate 3, the first step block 16 engages with the second step block 17, and at the same time, the inward step surface 7 engages with the outward convex step surface 8. At this time, the molding block 6 is inserted into the injection cavity 4, and a closed space is formed between the injection mold plate 3, the injection cavity 4 and the molding block 6. The plastic in the molten state enters the above-mentioned closed space through the injection hole 5 for injection molding.

[0032] The utility model adopts the arrangement of the inclined slideway 10 and the slide rod 11. At the same time, the contact surfaces of the upper mold core 1, the lower mold core 2 and the injection mold plate 3 are all inclined surfaces, so that the upper mold core 1 and the lower mold core 2 can be in contact with each other at the last moment of sliding the sealing inclined surface, thereby reducing the wear of the sealing position, greatly improving the service life of the mold production, and saving a lot of maintenance costs for the production enterprise;

[0033] Moreover, the three rear molds of the upper mold core 1, the lower mold core 2 and the injection mold plate 3 in the utility model can save molding time. After the rear mold is opened, the edges can be automatically removed, which improves the problem of easy adhesion of existing liquid burrs.

Claims

1. A mold structure that is easy to open and close, including a movable mold, a fixed mold and a driving structure, characterized in that: The movable mold comprises an upper mold core (1), a lower mold core (2) and an injection mold plate (3); the driving structure is used to drive the upper mold core (1) and the lower mold core (2) to synchronously approach or move away from the injection mold plate (3); an injection cavity (4) is formed between the upper mold core (1), the lower mold core (2) and the injection mold plate (3); an injection hole (5) communicating with the injection cavity (4) is provided on the injection mold plate (3); and a molding block (6) inserted into the injection cavity (4) is provided on the fixed mold.

2. The mold structure that is easy to open and close according to claim 1, characterized in that: The upper mold core (1) is provided with an inward-retracted stepped surface (7), and the lower mold core (2) is provided with an outward-convex stepped surface (8) that is convex and engages with the inward-retracted stepped surface (7) of the upper mold core (1).

3. The mold structure that is easy to open and close according to claim 2, characterized in that: Cooling channels (9) are provided in the upper mold core (1) and the lower mold core (2).

4. The mold structure that is easy to open and close according to claim 3, characterized in that: The driving structure includes a slideway (10), a slide rod (11), a spring (12) and a guide assembly. The slideways (10) are divided into two groups and are evenly arranged on the upper mold core (1) and the lower mold core (2). The two groups of slideways (10) are distributed in an inverted eight-shaped shape. The slide rod (11) is inserted into the slideway (10) and is slidably connected to the slideway (10) via the spring (12).

5. The mold structure that is easy to open and close according to claim 4, characterized in that: The guide assembly includes a guide block (13) and a guide groove (14). The guide block (13) is arranged on the side of the movable mold and fixed relative to the injection mold plate (3) by bolts. The guide groove (14) is opened on the side walls of the upper mold core (1) and the lower mold core (2) and is parallel to the slideway (10). The guide groove (14) is used to accommodate the guide block (13).

6. The mold structure that is easy to open and close according to claim 1, characterized in that: The invention also includes a locking structure, which is used to limit the position of the movable mold and the fixed mold after mold closing. The locking structure includes an auxiliary groove (15), a first step block (16) and a second step block (17). The auxiliary groove (15) is provided on the fixed mold to accommodate the first step block (16). The second step block (17) is inserted into the auxiliary groove (15) and can engage with the first step block (16).

7. The mold structure that is easy to open and close according to claim 1, characterized in that: A wear-resistant pad (18) is also provided on the outer side of the movable mold.

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