Lateral direct inclined core-pulling mechanism for oil cylinder of injection mold

Abstract

A lateral direct inclined core-pulling mechanism for an oil cylinder of an injection mold comprises a fixed mold plate and a lower compound plate, mold feet are arranged on the lower compound plate, an upper ejector plate, a lower ejector plate and an ejector are arranged on the lower compound plate between the mold feet, a movable mold plate is arranged on the mold feet, and an injection-molded plastic part is arranged between the movable mold plate and the fixed mold plate. An inclined downward inclined hole is formed in one side of the plastic part, an inclined mounting groove and a core-pulling hole are formed in the fixed mold plate, the inclined angles of the mounting groove and the core-pulling hole are consistent with those of the inclined hole, the mounting groove and the core-pulling hole are coaxial with the inclined hole, an oil cylinder is obliquely arranged in the mounting groove, a piston rod of the oil cylinder is connected with a core-pulling rod, and the core-pulling rod penetrates through the core-pulling hole to be matched with the inclined hole. Before the mold is opened, the piston rod of the oil cylinder drives the core pulling rod to pull out the inclined hole of the plastic part, the oil cylinder can be directly purchased, the structure is very simple, the installation is convenient, the action is stable and reliable, the mold volume is reduced, and the development cost of the mold is reduced.

Description

Technical Field

[0001] The utility model relates to an injection mold, in particular to a lateral inclined core pulling mechanism of an injection mold oil cylinder. Background Art

[0002] When a plastic part is manufactured by an injection mold, if the side wall of the plastic part is provided with a downwardly inclined inclined hole, the existing method usually adopts a combined inclined ejector core pulling structure, that is, an inclined ejector rod is arranged on the ejector plate, the upper end of the inclined ejector rod passes through the movable template and is inserted into the fixed template, a downwardly inclined guide rail is arranged on the outer wall of the upper end of the inclined ejector rod, and a core pulling rod is arranged in the fixed template, the outer wall of the core pulling rod is provided with a downwardly inclined guide groove, the guide groove of the core pulling rod cooperates with the guide rail of the inclined ejector rod, when the mold is opened, the ejector plate drives the ejector pin and the inclined ejector pin to move upward together, the ejector pin pushes the plastic part upward, and when the inclined ejector pin moves upward, it cooperates with the guide rail and the guide groove to drive the core pulling rod to move downward in the opposite direction to extract the inclined hole structure. The disadvantages of this structure are: the combined inclined ejector core pulling structure is complex, the processing precision is high, the manufacturing cost is high, it is easy to be damaged, and the volume is large. If it is installed inside the mold, the mold volume will increase, and a larger tonnage injection molding machine is required to drive it, resulting in an increase in the development cost of the whole machine. Summary of the invention

[0003] The utility model aims to overcome the shortcomings of the prior art and provide an injection mold oil cylinder lateral direct oblique core pulling mechanism which has a simple structure, is easy to install, reduces the mold volume and reduces the mold development cost.

[0004] The utility model discloses a technical scheme of a lateral direct inclined core pulling mechanism of an injection mold oil cylinder, which comprises a fixed template and a lower composite plate, wherein mold feet are arranged on the lower composite plate, an upper ejector plate, a lower ejector plate and an ejector are arranged on the lower composite plate between the mold feet, a movable template is arranged on the mold feet, an injection-molded plastic part is arranged between the movable template and the fixed template, an inclined hole inclined downward is formed on one side of the plastic part, an inclined mounting groove and a core pulling hole are formed in the fixed template, the mounting groove and the core pulling hole have the same inclination angle as the inclined hole and are located at the same axis, an oil cylinder is obliquely arranged in the mounting groove, a piston rod of the oil cylinder is connected to a core pulling rod, and the core pulling rod passes through the core pulling hole and cooperates with the inclined hole.

[0005] Furthermore, an elastic member is disposed on the outer wall of the core-pulling rod, one end of the elastic member is in contact with the oil cylinder, and the other end of the elastic member is in contact with the core-pulling rod.

[0006] Furthermore, the elastic member is a spherical elastic block or a spring made of soft rubber material.

[0007] Furthermore, a limit pin is arranged in the fixed template, and a limit groove is formed on one side of the core pulling rod, and the limit pin cooperates with the limit groove.

[0008] Furthermore, a fixing plate is arranged under the fixed template, the fixing plate is fixed to the fixed template via fasteners, and the bottom of the oil cylinder is fixed to the fixing plate via fasteners.

[0009] The utility model discloses a lateral direct inclined core pulling mechanism for an injection mold oil cylinder, which has the beneficial effects of: by obliquely arranging the oil cylinder and the core pulling rod in the fixed mold plate, the piston rod of the oil cylinder is used to drive the core pulling rod to pull out the inclined hole of the plastic part before the mold is opened. Compared with the existing combined linked core pulling structure, the oil cylinder can be purchased directly, the structure is very simple, the installation is convenient, the action is stable and reliable, the mold volume is reduced, and the mold development cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The utility model is a structural schematic diagram of a lateral direct inclined core pulling mechanism of an injection mold oil cylinder. DETAILED DESCRIPTION

[0011] The utility model relates to a lateral direct inclined core pulling mechanism for an injection mold oil cylinder, such as Figure 1 As shown, it includes a fixed mold plate 1 and a lower composite plate 2, a mold foot 3 is arranged on the lower composite plate 2, an upper ejector plate 4, a lower ejector plate 5 and an ejector 6 are arranged on the lower composite plate 2 between the mold feet 3, a movable mold plate 7 is arranged on the mold foot 3, an injection-molded plastic part 8 is arranged between the movable mold plate 7 and the fixed mold plate 1, a downwardly inclined inclined hole 9 is formed on one side of the plastic part 8, an inclined mounting groove 10 and a core pulling hole 11 are formed in the fixed mold plate 1, the mounting groove 10 and the core pulling hole 11 have the same inclination angle as the inclined hole 9 and are located on the same axis, an oil cylinder 12 is obliquely arranged in the mounting groove 10, a piston rod 13 of the oil cylinder 12 is connected to a core pulling rod 14, and the core pulling rod 14 passes through the core pulling hole 11 and cooperates with the inclined hole 9.

[0012] Furthermore, an elastic member 15 is provided on the outer wall of the core pulling rod 14, one end of the elastic member 15 contacts the oil cylinder 12, and the other end of the elastic member 15 contacts the core pulling rod 14. With the elastic member 15, during mold closing and injection molding, when the oil cylinder 12 pushes the core pulling rod 14 to return to the side wall of the movable plate 7, the elastic member 15 can further lock the core pulling rod 14, so that the core pulling rod 14 can be closely attached to the side wall of the movable plate 7, preventing the core pulling rod 14 from being out of contact with the movable plate 7 due to excessive injection pressure. Once out of contact, the plastic material will flow into the inclined hole 9 of the injection-molded plastic part 8, resulting in product scrapping.

[0013] Furthermore, the elastic member 15 is a spherical elastic block or a spring made of soft rubber material.

[0014] Furthermore, a limit pin 16 is provided in the fixed die plate 1, and a limit groove 17 is formed on one side of the core pulling rod 14, and the limit pin 16 cooperates with the limit groove 17. With the limit pin 16, the forward and backward movement distance of the core pulling rod 14 can be limited, and since the core pulling rod 14 is a circular structure, the limit pin 16 can also prevent the core pulling rod 14 from rotating axially.

[0015] Furthermore, a fixing plate 18 is provided under the fixed mold plate 1, and the fixing plate 18 is fixed to the fixed mold plate 1 via fasteners, and the bottom of the oil cylinder 12 is fixed to the fixing plate 18 via fasteners. With the fixing plate 18, the oil cylinder 12 is reliably fixed, and installation and disassembly are very convenient.

[0016] The utility model discloses a lateral direct oblique core pulling mechanism of an injection mold oil cylinder. When a plastic part 8 is injection molded, the piston rod 13 of the oil cylinder 12 first drives the core pulling rod 14 to move obliquely downward along the core pulling hole 11, so that the core pulling rod 14 is pulled out of the oblique hole 9 of the plastic part 8 downward. At this time, the top of the limiting groove 17 on the outer wall of the core pulling rod 14 is limitedly matched with the limiting pin 16, the core pulling rod 14 moves into place, and the bottom of the core pulling rod 14 presses the elastic member 15 downward, and then the injection mold is molded. The molding machine drives the lower plate 2, the mold foot 3, the upper ejector plate 4, the lower ejector plate 5, the ejector 6, the movable mold plate 7 and the plastic part 8 to move downward together, while the fixed mold plate 1, the oil cylinder 12, the core pulling rod 14, the elastic part 15, the limit pin 16 and the fixed plate 18 remain stationary, so that the mold is opened from the fixed mold plate 1 and the movable mold plate 7, and finally the upper and lower ejector plates 4 and 5 are pushed upward by the power, and the upper and lower ejector plates 4 and 5 drive the ejector 6 to push the plastic part 8 upward to demold. This scheme is a direct oblique core pulling mechanism of the oil cylinder of the injection mold, by obliquely setting the oil cylinder 12 and the core pulling rod 14 in the fixed mold plate 1, and using the piston rod 13 of the oil cylinder 12 to drive the core pulling rod 14 to pull out the oblique hole 9 of the plastic part 8 before the mold is opened. Compared with the existing combined linked core pulling structure, the oil cylinder 12 can be purchased directly, the structure is very simple, the installation is convenient, the action is stable and reliable, the mold volume is reduced, and the mold development cost is reduced.

Claims

1. A lateral direct oblique core pulling mechanism for an injection mold oil cylinder, comprising a fixed mold plate (1) and a lower double plate (2), wherein a mold foot (3) is arranged on the lower double plate (2), an upper ejector plate (4), a lower ejector plate (5) and an ejector (6) are arranged on the lower double plate (2) between the mold feet (3), a movable mold plate (7) is arranged on the mold feet (3), an injection-molded plastic part (8) is arranged between the movable mold plate (7) and the fixed mold plate (1), and a downwardly inclined oblique hole (9) is formed on one side of the plastic part (8), characterized in that: The fixed template (1) is provided with an inclined mounting groove (10) and a core pulling hole (11). The mounting groove (10) and the core pulling hole (11) have the same inclination angle as the inclined hole (9) and are located at the same axis. An oil cylinder (12) is arranged obliquely in the mounting groove (10). The piston rod (13) of the oil cylinder (12) is connected to a core pulling rod (14). The core pulling rod (14) passes through the core pulling hole (11) and cooperates with the inclined hole (9).

2. The injection mold oil cylinder lateral direct oblique core pulling mechanism according to claim 1, characterized in that: An elastic member (15) is disposed on the outer wall of the core pulling rod (14); one end of the elastic member (15) is in contact with the oil cylinder (12), and the other end of the elastic member (15) is in contact with the core pulling rod (14).

3. The injection mold oil cylinder lateral direct oblique core pulling mechanism according to claim 2, characterized in that: The elastic member (15) is a spherical elastic block or a spring made of soft rubber material.

4. The injection mold oil cylinder lateral direct oblique core pulling mechanism according to claim 1, characterized in that: A limit pin (16) is provided in the fixed die plate (1), and a limit groove (17) is formed on one side of the core pulling rod (14), and the limit pin (16) cooperates with the limit groove (17).

5. The injection mold oil cylinder lateral direct oblique core pulling mechanism according to claim 1, characterized in that: A fixing plate (18) is arranged under the fixed mold plate (1), the fixing plate (18) is fixed to the fixed mold plate (1) via fasteners, and the bottom of the oil cylinder (12) is fixed to the fixing plate (18) via fasteners.

Images