Roller type ejection mechanism

Abstract

The utility model is applicable to the technical field of molds, and provides a roller type ejection mechanism which comprises a lifting base, a moving groove is formed in the top of the lifting base, a lifting assembly is mounted in the moving groove, a through hole is formed in the bottom of the moving groove, a return stroke elastic ejection pin is obliquely mounted in the lifting base, and a roller is mounted in the return stroke elastic ejection pin. The telescopic end of the return stroke elastic lifting pin extends out of the through hole and abuts against the lifting assembly. When the upper mold moves downwards and is combined with the lower mold for mold forming, downward pressure can be applied to the contact roller and the supporting arm, so that the supporting arm rotates downwards, meanwhile, the return elastic pin shrinks until the lower mold touches the top of the lifting base, and after the mold is formed, the upper mold returns to the original position, and the lower mold loses the downward pressure, the supporting arm can rotate downwards. The supporting arm drives the lower mold and the formed mold to move upwards under the elastic action of the return elastic pin to achieve automatic demolding, and an operator can take the mold conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds, and in particular relates to a roller type ejection mechanism. Background Art

[0002] Molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. They are tools used to make molded objects. Such tools are composed of various parts, and different molds are composed of different parts. The shape of the object is mainly processed by changing the physical state of the molded material.

[0003] In many mold forming processes, it is common to place a blank in a lower mold, and then combine the upper mold and the lower mold to form the part. Alternatively, after the upper mold and the lower mold are combined, injection molding is performed into the space enclosed by the two to complete the forming of the part. After the parts are formed, they are mostly embedded in the lower mold, and manual demolding of the parts is required. This not only poses a safety hazard (the injection molding of materials is mostly carried out at high temperatures), but also wastes manpower. Therefore, a lifting mechanism that can automatically demold is invented to solve the above problems. Utility Model Content

[0004] The utility model provides a roller type ejection mechanism, aiming to solve the problems mentioned in the above background technology.

[0005] The utility model is implemented as follows: a roller type ejection mechanism comprises a lifting base, a movable groove is provided on the top of the lifting base, a lifting assembly is installed in the movable groove, a through hole is provided at the bottom of the movable groove, a return spring pin is obliquely installed inside the lifting base, the telescopic end of the return spring pin extends out from the through hole and conflicts with the lifting assembly; the lifting assembly comprises a support arm, a mounting hole is provided on the side wall of the movable groove, the support arm is installed on the mounting hole through a rotating shaft, and a roller assembly is installed at the corner of the top of the support arm.

[0006] Preferably, the roller assembly comprises a contact roller, a mounting groove is provided at a corner of the support arm, and the contact roller is rotatably mounted in the mounting groove via a fixed shaft.

[0007] Preferably, a slot is provided above the movable slot and at the top center of the supporting base, and a limiting component is installed in the slot.

[0008] Preferably, the limit assembly includes a limit cover plate, which is covered in the slot, and has insertion holes opposite to each other on the limit cover plate. The bottom of the slot has threaded holes opposite to each other, and the threaded holes correspond to the insertion holes, and bolts are threadedly connected in the insertion holes and the threaded holes.

[0009] Preferably, support columns 1 are installed opposite to each other in the lifting base, and the support columns 1 are respectively located on both sides of the slot.

[0010] Preferably, two support columns are installed opposite to each other in the lifting base, and the two support columns are respectively located on both sides of the return ejector pin.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. When the upper mold moves downward and combines with the lower mold for molding, it will give downward pressure to the contact roller and the support arm, causing the support arm to rotate downward, and at the same time the return elastic pin contracts until the lower mold touches the top of the lifting base. When the mold is formed, the upper mold returns to its original position. After the lower mold loses the downward pressure, the support arm drives the lower mold and the formed mold upward under the elastic force of the return elastic pin to eject the mold, realizing automatic demoulding and facilitating the operator to take it.

[0013] 2. When the lower mold is pressed down, the lower mold touches the contact roller first, and the contact roller transmits the pressure to the support arm to realize downward rotation. During the downward rotation of the support arm, the contact roller rolls on the bottom of the lower mold, reducing the friction between the contact roller and the lower mold, avoiding wear between the lower mold and the support arm, and increasing the service life of both. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model in the initial state;

[0015] Figure 2 For the utility model Figure 1 Schematic diagram of the explosion structure;

[0016] Figure 3 For the utility model Figure 1 A front cross-sectional schematic diagram of ;

[0017] Figure 4 It is a front schematic diagram of the utility model in the initial state;

[0018] Figure 5 It is a front view schematic diagram of the utility model under pressure;

[0019] In the figure:

[0020] 1. Lifting base; 2. Moving slot; 3. Mounting hole;

[0021] 4. Lifting assembly; 41. Support arm; 42. Rotating shaft; 43. Roller assembly; 431. Mounting groove; 432. Contact roller; 433. Fixed shaft;

[0022] 5. Return ejector pin; 6. Through hole; 7. Card slot;

[0023] 8. Limiting assembly; 81. Limiting cover plate; 82. Insertion hole; 83. Threaded hole; 84. Bolt;

[0024] 9. Support column one; 10. Support column two. DETAILED DESCRIPTION

[0025] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0026] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0027] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] See also Figure 1-5The utility model provides a technical solution: a roller type ejection mechanism, comprising a lifting base 1, a moving groove 2 is provided on the top of the lifting base 1, a lifting assembly 4 is installed in the moving groove 2, a through hole 6 is provided at the bottom of the moving groove 2, a return ejection pin 5 is obliquely installed inside the lifting base 1, and the telescopic end of the return ejection pin 5 extends from the through hole 6 and conflicts with the lifting assembly 4;

[0031] The lifting assembly 4 includes a supporting arm 41 . A mounting hole 3 is provided on the side wall of the movable groove 2 . The supporting arm 41 is mounted on the mounting hole 3 via a rotating shaft 42 . A roller assembly 43 is installed at the corner of the top of the supporting arm 41 .

[0032] Specifically, the rotating shaft 42 is rotatably mounted on the supporting arm 41, and the ends of the rotating shaft 42 on both sides of the supporting arm 41 are respectively inserted into the mounting holes 3, so that the supporting arm 41 can rotate with the axis of the rotating shaft 42 as the axis;

[0033] The telescopic end of the return elastic pin 5 is in contact with the bottom wall of the support arm 41. When the support arm 41 is subjected to downward pressure and rotates downward, the support arm 41 simultaneously applies downward pressure to the return elastic pin 5, and the telescopic end of the return elastic pin 5 contracts inwardly. When the pressure on the support arm 41 disappears, the return elastic pin 5 extends the telescopic end again with its own elastic force and pushes the support arm 41 back to its original position.

[0034] This mechanism is placed under the lower mold. When the upper mold moves downward and combines with the lower mold to form a mold, it will give downward pressure to the support arm 41. When the mold is formed, the upper mold returns to its original position and the lower mold loses the downward pressure. The support arm 41 drives the lower mold and the formed mold to move upward under the elastic force of the return elastic pin 5 to achieve automatic demoulding, which is convenient for the operator to take.

[0035] Furthermore, the roller assembly 43 includes a contact roller 432 . A mounting groove 431 is provided at a corner of the support arm 41 . The contact roller 432 is rotatably mounted in the mounting groove 431 via a fixed shaft 433 .

[0036] Specifically, opposite holes are provided on both sides of the mounting groove 431, the contact roller 432 is sleeved on the side wall of the fixed shaft 433, and both ends of the fixed shaft 433 are respectively inserted into the holes to facilitate the contact roller 432 to roll;

[0037] The setting of the roller assembly 43 ensures that when the lower mold is pressed downward, the lower mold first touches the contact roller 432, and the contact roller 432 transmits the pressure to the support arm 41 to realize downward rotation. During the downward rotation of the support arm 41, the contact roller 432 rolls on the bottom of the lower mold, reducing the friction between the contact roller 432 and the lower mold, reducing the wear between the lower mold and the support arm 41, and increasing the service life of both.

[0038] Furthermore, a slot 7 is provided above the movable slot 2 and at the top center of the lifting base 1 , and a limiting component 8 is installed in the slot 7 .

[0039] Specifically, the setting of the limit assembly 8 ensures that the rotation of the support arm 41 is within a limited range, that is, it ensures that the support arm 41 is in a state of being about to rotate downward, and ensures that the support arm 41 can rotate downward with the rotating shaft 42 as the center when subjected to downward pressure, thereby preventing the support arm 41 from excessively rotating under the elastic force of the return ejector pin 5, resulting in the lower mold contacting the rear end of the support arm 41 when the next pressure comes, causing the support arm 41 to move downward as a whole under the action of pressure, causing structural damage.

[0040] Furthermore, the limit assembly 8 includes a limit cover plate 81, which is covered in the slot 7. The limit cover plate 81 has opposite insertion holes 82, and the bottom of the slot 7 has opposite threaded holes 83. The threaded holes 83 correspond to the insertion holes 82, and bolts 84 are threadedly connected in the insertion holes 82 and the threaded holes 83.

[0041] Specifically, the bolt 84 is first inserted into the socket 82 and then threaded into the threaded hole 83 to fix the limit cover 81 in the slot 7; when the support arm 41 rotates under the action of the return ejector pin 5, the contact roller 432 is at the highest point due to the obstruction of the limit cover 81 to ensure that the lower mold touches the contact roller 432 first.

[0042] Furthermore, supporting columns 9 are installed opposite to each other in the lifting base 1 , and the supporting columns 9 are respectively located on both sides of the slot 7 .

[0043] Furthermore, two supporting columns 10 are installed opposite to each other in the lifting base 1 , and the two supporting columns 10 are respectively located on both sides of the return ejector pin 5 .

[0044] Specifically, the lifting base 1 is hollow inside to save materials, and the support column 1 9 and the support column 2 10 support the lifting base 1. When the lower mold is subjected to downward pressure, the support arm 41 is driven to rotate downward until the bottom of the lower mold touches the top of the lifting base 1, and the pressure brought by the lower mold is shared by the support column 1 9 and the support column 2 10. Figure 5 shown.

[0045] Working principle and use process of the utility model: After the utility model is installed, the mechanism is placed at the bottom of the lower mold, and the contact roller 432 is in contact with the bottom of the lower mold; when the upper mold moves downward and combines with the lower mold for molding, it will give downward pressure to the contact roller 432 and the support arm 41, so that the support arm 41 rotates with the rotating shaft 42 as the center of the circle, and at the same time, the telescopic end of the return elastic pin 5 shrinks inward until the lower mold touches the top of the lifting base 1. Figure 5 As shown;

[0046] After the mold is formed, the upper mold returns to its original position. After the lower mold loses the downward pressure, the support arm 41 drives the lower mold and the formed mold upward under the elastic force of the return elastic pin 5 to push the mold out to achieve automatic demoulding, which is convenient for the operator to take.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A roller ejection mechanism, characterized in that: The lifting device comprises a lifting base (1), a movable groove (2) is provided on the top of the lifting base (1), a lifting assembly (4) is installed in the movable groove (2), a through hole (6) is provided on the bottom of the movable groove (2), a return spring pin (5) is obliquely installed inside the lifting base (1), and the telescopic end of the return spring pin (5) extends out from the through hole (6) and contacts the lifting assembly (4); The lifting assembly (4) comprises a supporting arm (41), a mounting hole (3) is provided on the side wall of the movable groove (2), the supporting arm (41) is mounted on the mounting hole (3) via a rotating shaft (42), and a roller assembly (43) is installed at the corner of the top of the supporting arm (41).

2. A roller ejection mechanism according to claim 1, characterized in that: The roller assembly (43) comprises a contact roller (432). A mounting groove (431) is provided at a corner of the support arm (41). The contact roller (432) is rotatably mounted in the mounting groove (431) via a fixed shaft (433).

3. A roller type ejection mechanism according to claim 1, characterized in that: A clamping slot (7) is provided above the movable slot (2) and at the top center of the lifting base (1), and a limiting component (8) is installed in the clamping slot (7).

4. A roller type ejection mechanism as claimed in claim 3, characterized in that: The limit assembly (8) comprises a limit cover plate (81), the limit cover plate (81) is covered in the slot (7), the limit cover plate (81) is provided with plug holes (82) opposite to each other, the bottom of the slot (7) is provided with threaded holes (83) opposite to each other, the threaded holes (83) correspond to the plug holes (82), and bolts (84) are screwed in the plug holes (82) and the threaded holes (83).

5. A roller type ejection mechanism as claimed in claim 3, characterized in that: Support columns (9) are installed opposite to each other in the lifting base (1), and the support columns (9) are respectively located on both sides of the clamping slot (7).

6. A roller type ejection mechanism according to claim 1, characterized in that: The lifting base (1) is also provided with two support columns (10) opposite to each other, and the two support columns (10) are respectively located on both sides of the return ejector pin (5).

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