Inside and outside core pulling and piece pushing stripping mechanism of injection mold

Abstract

An injection mold mechanism capable of pulling cores inside and outside and pushing and stripping comprises an upper compound plate and a lower compound plate, an upper padding plate is arranged below the upper compound plate, a fixed mold plate is arranged below the upper compound plate, a movable mold plate is arranged on the lower compound plate, a mold cavity is formed between the movable mold plate and the fixed mold plate, an inclined penetrating hole is formed in the fixed mold plate, an inclined sliding block is arranged in the inclined penetrating hole, and a vertical sliding groove is formed in one side of the inclined sliding block. An inner core-pulling sliding block is arranged in the inclined penetrating hole and provided with an inner sliding rail, the inner sliding rail is matched with the vertical sliding groove, a limiting groove is formed in one side of the inclined sliding block, an upper limiting block is arranged in the fixed mold plate and matched with the upper end of the limiting groove, a lower limiting block is arranged in the movable mold plate and matched with the lower portion of the limiting groove, and a fixing base is arranged below the fixed mold plate. An inclined sliding groove and an oil cylinder are obliquely arranged on one side of the fixing base, an outer core pulling sliding block is arranged on the inclined sliding groove, an inclined sliding rail is arranged on one side of the outer core pulling sliding block and is in sliding fit with the inclined sliding groove, and a piston rod of the oil cylinder is connected with the outer core pulling sliding block.

Description

Technical Field

[0001] The utility model relates to an injection mold, in particular to a mechanism for the injection mold which can both pull the core inside and outside and push and remove the material. Background Art

[0002] When using an injection mold to produce a plastic part, if the plastic part is a cylindrical structure, and the inner wall of the cylindrical plastic part 10' is provided with an inner groove 11', and the outer wall of the cylindrical plastic part 10' is provided with an outer protrusion 12', the existing injection mold (see attached Figure 5 ) Usually, the mold cavity and the plastic part 10' are arranged on one side of the movable mold, and an ejection structure, an inner core pulling structure and an outer core pulling structure are arranged on the movable mold side. The ejection structure is mainly composed of an upper ejector plate 1', a lower ejector plate 2', and a stripper plate 3'. The inner core pulling structure is composed of an inclined ejector rod 4' and an inclined ejector block 5'. The lower part of the inclined ejector rod 4' is connected to the upper and lower ejector plates 1' and 2', and the upper part of the inclined ejector rod 4' is connected to the inclined ejector block 5'. The outer core pulling structure is an outer core pulling slider 6', and the outer core pulling slider is connected to the oil cylinder 7'. After the cylindrical plastic part is injection molded, it is necessary to first drive the outer core pulling slider 6' to move outwards through the piston rod of the oil cylinder 7' to disengage the outer protrusion 12' of the outer wall of the plastic part 10', and then open the mold from the fixed mold plate 8' and the movable mold plate 9', and the power The upper and lower ejector plates 1′ and 2′ are driven to move upward, and the upper and lower ejector plates 1′ and 2′ drive the stripping plate 3′ and the inclined ejector rod 4′ upward. While the stripping plate 3′ drives the cylindrical plastic part 10′ to be demoulded upward, the inclined ejector rod 4′ drives the inclined ejector block 5′ to gradually withdraw the inner slot 11′ inward. The disadvantages of this structure are: first, the ejection structure is set, and space is reserved for the ejector plate to move up and down, resulting in an increase in the height of the mold, a more complex structure, an increased manufacturing cost, and an increased volume of the mold. A larger tonnage injection molding machine is required to drive the injection mold, thereby increasing the manufacturing cost of the mold; second, before the mold is opened, the outer side core pulling is required before the mold can be opened. The outer side core pulling action takes up the mold opening time, thereby affecting the production efficiency of the mold. Summary of the invention

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an injection mold with both internal and external core pulling and part pushing and material removal mechanisms, which has a compact structure, reduces the mold volume, reduces the parts used in the mold, reduces the mold manufacturing cost, and improves the mold production efficiency.

[0004] The technical scheme of the utility model injection mold with both inner and outer core pulling and part pushing and removing mechanism is as follows: it comprises an upper composite plate and a lower composite plate, an upper pad is arranged under the upper composite plate, a fixed template is arranged under the upper pad, a movable template is arranged on the lower composite plate, a mold cavity is formed between the movable template and the fixed template, a cylindrical plastic part formed by injection molding is arranged in the mold cavity, an inner card groove is formed on the inner wall of the cylindrical plastic part, an outer convex block is formed on the outer wall of the cylindrical plastic part, an oblique through hole is formed in the oblique through hole, an oblique slide block is arranged on one side of the oblique slide block, an inner core pulling slide block is arranged at a position of the oblique through hole corresponding to the inner card groove, one side of the inner core pulling slide block cooperates with the inner card groove, and the other side of the inner core pulling slide block is There is an inner slide rail, which cooperates with the vertical slide groove. The bottom of the inclined sliding block passes through the oblique through hole and contacts with the movable template. A limit groove is made on one side of the inclined sliding block. An upper limit block is arranged in the fixed template, and the upper limit block cooperates with the upper end of the limit groove. A lower limit block is arranged in the movable template, and the lower limit block cooperates with the lower part of the limit groove. A fixed seat is arranged under the fixed template, and an inclined slide groove and an oil cylinder are obliquely arranged on one side of the fixed seat. An outer core-pulling sliding block is arranged on the inclined slide groove, and an inclined slide rail is made on one side of the outer core-pulling sliding block, and the inclined slide rail slidably cooperates with the inclined slide groove. The piston rod of the oil cylinder is connected to the outer core-pulling sliding block, and the other side of the outer core-pulling sliding block cooperates with the outer protrusion of the cylindrical plastic part.

[0005] Furthermore, the inclined sliding block is provided with a mounting hole and a through hole, a limiting step is formed between the mounting hole and the through hole, a push rod is arranged in the mounting hole, one end of the push rod passes through the through hole and contacts the upper pad, and the other end of the push rod is provided with a limiting convex ring, the limiting convex ring cooperates with the limiting step, a plug is arranged at the lower part of the mounting hole, and a spring is arranged in the mounting hole between the plug and the limiting convex ring.

[0006] Furthermore, the plug is threadably matched with the mounting hole.

[0007] Furthermore, a concave cavity is formed on the movable template, and the bottom of the inclined sliding block contacts the concave cavity.

[0008] The beneficial effects of the injection mold of the utility model which has both internal and external core pulling and part pushing and removing mechanism are as follows: first, through the cooperation of the lower limit block and the limit groove of the inclined slide block, when the mold is opened, the inclined slide block is driven to first follow the movable template to move downward obliquely, and then the vertical slide groove of the inclined slide block cooperates with the inner slide rail of the inner core pulling slide block to drive the inner core pulling slide block to pull out the inner groove of the cylindrical plastic part inwardly, and the inner core pulling action is performed while the mold is opened. The inner core pulling action does not occupy the mold opening time, thereby improving the production efficiency of the mold; second, the outer core pulling slide block is used to cooperate with the outer protrusion of the cylindrical plastic part. When the outer core pulling slide block moves obliquely downward along the inclined slide groove via the inclined slide rail, the outer protrusion and the entire cylindrical plastic part are driven to be demolded downward, and at the same time, the outer core pulling slide block pulls out the outer protrusion outwardly. This structure omits the ejection structure of the product, makes the entire mold structure more compact, reduces the mold volume, reduces the components used in the mold, and thus reduces the mold development cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the mold closing state structure of the utility model injection mold with both inner and outer core pulling and piece pushing and material removal mechanism;

[0010] Figure 2 It is a structural schematic diagram of the state in which the inner core-pulling slider of the injection mold of the utility model is pulled out of the inner card slot, and the inner core-pulling slider of the push-piece stripping mechanism is pulled out;

[0011] Figure 3 It is a schematic structural diagram of the state in which the plastic part is released from the fixed mold plate after the mold is opened, and the utility model has both inner and outer core pulling and part pushing and material removal mechanisms;

[0012] Figure 4 yes Figure 3 A local enlarged schematic diagram of point A;

[0013] Figure 5 The utility model relates to a structure of an existing cylindrical plastic part injection mold. DETAILED DESCRIPTION

[0014] The utility model relates to an injection mold having both inner and outer core pulling and part pushing and material removing mechanism, such as Figure 1 — Figure 4 As shown, it includes an upper composite plate 1 and a lower composite plate 2, an upper pad 3 is arranged under the upper composite plate 1, a fixed mold plate 4 is arranged under the upper pad 3, and a movable mold plate 5 is arranged on the lower composite plate 2. A mold cavity is formed between the movable mold plate 5 and the fixed mold plate 4, and an injection-molded cylindrical plastic part 6 is arranged in the mold cavity. The inner wall of the cylindrical plastic part 6 is formed with an inner groove 7, and the outer wall of the cylindrical plastic part 6 is formed with an outer convex block 8. An oblique through hole 9 is formed in the fixed mold plate 4, and an oblique sliding block 10 is arranged in the oblique through hole 9. A vertical slide groove 11 is formed on one side of the oblique sliding block 10. An inner core-pulling sliding block 12 is arranged at a position of the oblique through hole 9 corresponding to the inner groove 7. One side of the inner core-pulling sliding block 12 cooperates with the inner groove 7, and the other side of the inner core-pulling sliding block 12 is formed with an inner slide rail 13, and the inner slide rail 13 cooperates with the vertical slide groove 11. The bottom of the inclined sliding block 10 passes through the inclined through hole 9 and contacts the movable template 5. A limit groove 14 is formed on one side of the inclined sliding block 10. An upper limit block 15 is arranged in the fixed template 4. The upper limit block 15 cooperates with the upper end of the limit groove 14. A lower limit block 16 is arranged in the movable template 5. The lower limit block 16 cooperates with the lower part of the limit groove 14. A fixed seat 17 is arranged under the fixed template 4. An inclined slide groove 18 and an oil cylinder 19 are obliquely arranged on one side of the fixed seat 17. An outer core pulling sliding block 20 is arranged on the inclined slide groove 18. An inclined slide rail 21 is formed on one side of the outer core pulling sliding block 20. The inclined slide rail 21 is slidably matched with the inclined slide groove 18. The piston rod of the oil cylinder 19 is connected to the outer core pulling sliding block 20. The other side of the outer core pulling sliding block 20 cooperates with the outer protrusion 8 of the cylindrical plastic part 6.

[0015] Furthermore, the inclined sliding block 10 is formed with a mounting hole 22 and a through hole 23, a limiting step 24 is formed between the mounting hole 22 and the through hole 23, a push rod 25 is arranged in the mounting hole 22, one end of the push rod 25 passes through the through hole 23 and contacts the upper pad 3, and the other end of the push rod 25 is formed with a limiting convex ring 26, the limiting convex ring 26 cooperates with the limiting step 24, a plug 27 is arranged at the lower part of the mounting hole 22, and a spring 28 is arranged in the mounting hole 22 between the plug 27 and the limiting convex ring 26. When the mold is opened, the lower limit block 16 cooperates with the lower part of the limit groove 14. When the lower limit block 16 drives the inclined slide block 10 to move downward, the spring 28 pushes the plug 27 and the inclined slide block 10 to move downward along the inclined through hole 9 under the action of the elastic force, and the head of the push rod 25 passes through the through hole 23 of the inclined slide block 10 in the opposite direction upward under the thrust of the spring 28 (the actual action is that the inclined slide block 10 moves downward, and the push rod 25 remains stationary). When the limiting convex ring 26 of the push rod 25 contacts the limiting step 24, the inclined slide block 1 0 stops moving downward, this structure can further limit the downward movement distance of the inclined slide block 10, and the spring 28 can also play a role of elastic push on the inclined slide block 10 after it moves down to the right position, so that the inclined slide block 10 can be kept in this position with accurate positioning; if there is no spring structure, the inclined slide block 10 will be reset upward for a short distance, which will cause the lower limit block 16 to be unable to correspond to the inclined slide block 10 when the mold is closed, and the lower limit block 16 will be stuck at the bottom of the inclined slide block 10 and unable to be reset, affecting the normal opening and closing of the mold.

[0016] Furthermore, the plug 27 is threadably matched with the mounting hole 22 .

[0017] Furthermore, a cavity 29 is formed on the movable platen 5, and the bottom of the inclined slider 10 contacts the cavity 29. The cavity 29 is opened on one side of the movable platen 5, and the bottom of the inclined slider 10 is inserted into the cavity 29, so that the space inside the mold is fully utilized, the mold structure is more compact, and the volume of the mold is reduced.

[0018] The utility model discloses an injection mold having both inner and outer core pulling and part pushing and removing mechanism. After the cylindrical plastic part 6 is injection molded, the lower composite plate 2 is first driven downward by the injection molding machine, and the lower composite plate 2 drives the movable template 5 and the lower limit block 16 to move downward. The lower limit block 16 cooperates with the lower part of the limit groove 14 of the inclined slide block 10, and drives the inclined slide block 10 to move downward along the inclined through hole 9. The inclined slide block 10 cooperates with the inner slide rail 13 of the inner core pulling slide block 12 through the vertical slide groove 11 on one side. When the inclined slide block 10 moves downward, the inner core pulling slide block 12 is driven to move inward, so that the inner core pulling slide block 12 is pulled out of the inner card groove 7 of the inner wall of the cylindrical plastic part 6. When the inclined slide block 10 moves downward to the upper part of the limit groove 14 and the upper limit block 15, the inner core pulling slide block 12 is pulled out of the inner card groove 7 of the inner wall of the cylindrical plastic part 6. When the mold is in the right position, the lower limit block 16 just comes out of the limit groove 14, the lower composite plate 2, the movable template 5, and the lower limit block 16 continue to move downward, so that the mold is completely opened from the fixed template 4 and the movable template 5. At this time, the piston rod of the cylinder 19 drives the outer core-pulling slider 20 to move downward along the inclined slide groove 18 of the fixed seat 17. A groove 30 that cooperates with the outer protrusion 8 is formed on the side wall of the outer core-pulling slider 20. When the outer core-pulling slider 20 moves downward, the groove 30 cooperates with the outer protrusion 8, and utilizes the pulling force of the groove to drive the outer protrusion 8 and the entire cylindrical plastic part 6 that completes the inner core pulling to move downward. At the same time, the groove 30 also gradually moves outward to escape from the outer protrusion 8. Finally, the cylindrical plastic part 6 can be taken out by a robot or a worker. The injection mold of this scheme has both internal and external core pulling and push-out material removal mechanisms. First, through the cooperation of the lower limit block 16 and the limit groove 14 of the inclined slide block 10, when the mold is opened, the inclined slide block 10 is driven to first follow the movable template 5 to move downward in an inclined manner, and then the vertical slide groove 11 of the inclined slide block 10 cooperates with the inner slide rail 13 of the inner core pulling slide block 12 to drive the inner core pulling slide block 12 to pull out the inner card groove 7 of the cylindrical plastic part 6 inward, and the inner core pulling action is performed while the mold is opened. The inner core pulling action does not occupy the mold opening time, which improves the mold Production efficiency; 2. The outer core-pulling slider 20 is used to cooperate with the outer protrusion 8 of the cylindrical plastic part 6. When the outer core-pulling slider 20 moves downward along the inclined slide groove 18 via the inclined slide rail 21, the outer protrusion 8 and the entire cylindrical plastic part 6 are driven to be demolded downward. At the same time, the outer core-pulling slider 20 pulls out the outer protrusion 8. This structure omits the ejection structure of the product, making the entire mold structure more compact, reducing the mold volume, and reducing the components used in the mold, thereby reducing the mold development cost.

Claims

1. An injection mold has both an inner and outer core pulling and a part ejection mechanism, comprising an upper composite plate (1) and a lower composite plate (2), an upper pad plate (3) is arranged under the upper composite plate (1), a fixed mold plate (4) is arranged under the upper pad plate (3), a movable mold plate (5) is arranged on the lower composite plate (2), a mold cavity is formed between the movable mold plate (5) and the fixed mold plate (4), a cylindrical plastic part (6) to be injection molded is arranged in the mold cavity, an inner groove (7) is formed on the inner wall of the cylindrical plastic part (6), and an outer protrusion (8) is formed on the outer wall of the cylindrical plastic part (6), characterized in that: The fixed template (4) is provided with an oblique through hole (9), an oblique sliding block (10) is provided in the oblique through hole (9), a vertical slide groove (11) is provided on one side of the oblique sliding block (10), an inner core-pulling sliding block (12) is provided at a position corresponding to the inner card groove (7) of the oblique through hole (9), one side of the inner core-pulling sliding block (12) cooperates with the inner card groove (7), an inner slide rail (13) is provided on the other side of the inner core-pulling sliding block (12), the inner slide rail (13) cooperates with the vertical slide groove (11), the bottom of the oblique sliding block (10) passes through the oblique through hole (9) and contacts with the movable template (5), a limit groove (14) is provided on one side of the oblique sliding block (10), an upper limit block (15) is provided in the fixed template (4), and the upper The limit block (15) cooperates with the upper end of the limit groove (14), and a lower limit block (16) is arranged in the movable template (5). The lower limit block (16) cooperates with the lower part of the limit groove (14). A fixed seat (17) is arranged under the fixed template (4). An inclined slide groove (18) and an oil cylinder (19) are obliquely arranged on one side of the fixed seat (17). An outer core-pulling slider (20) is arranged on the inclined slide groove (18). An inclined slide rail (21) is formed on one side of the outer core-pulling slider (20). The inclined slide rail slidably cooperates with the inclined slide groove (18). The piston rod of the oil cylinder (19) is connected to the outer core-pulling slider (20). The other side of the outer core-pulling slider (20) cooperates with the outer protrusion (8) of the cylindrical plastic part (6).

2. The injection mold as claimed in claim 1 has both inner and outer core pulling and part pushing and material removal mechanism, characterized in that: The inclined sliding block (10) is provided with a mounting hole (22) and a through hole (23), a limiting step (24) is formed between the mounting hole (22) and the through hole (23), a push rod (25) is provided in the mounting hole (22), one end of the push rod (25) passes through the through hole (23) and contacts the upper pad (3), the other end of the push rod (25) is provided with a limiting convex ring (26), the limiting convex ring (26) cooperates with the limiting step (24), a plug (27) is provided at the lower part of the mounting hole (22), and a spring (28) is provided in the mounting hole (22) between the plug (27) and the limiting convex ring (26).

3. The injection mold as claimed in claim 2 has both inner and outer core pulling and part pushing and material removal mechanism, characterized in that: The plug (27) is threadably matched with the mounting hole (22).

4. The injection mold as claimed in claim 1 has both inner and outer core pulling and part pushing and material removal mechanism, characterized in that: The movable die plate (5) is provided with a concave cavity (29), and the bottom of the inclined sliding block (10) is in contact with the concave cavity (29).

Images