Injection mold with ejection positioning mechanism

Abstract

The utility model relates to an injection mold with an ejection positioning mechanism, which comprises an ejector pin plate, a positioning ejector pin and a movable mold bottom plate, and further comprises a driving sleeve slidably mounted on the movable mold bottom plate and an elastic piece arranged in the driving sleeve and driving the driving sleeve to have a trend to move towards the ejector pin plate all the time; the bottom of the positioning ejector pin is connected with the top of the driving sleeve; the driving sleeve is provided with a first station and a second station, and when the driving sleeve is located at the first station, the positioning ejector pin is in a reset state; and when the driving sleeve is located at the second station, the positioning ejector pin is in an ejection state. The injection molding product can be positioned when the injection molding product is ejected out, and manufacturing is easy and convenient.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of injection molds, in particular to an injection mold with an ejection positioning mechanism. BACKGROUND

[0002] An injection mold is a tool capable of producing injection products, and the injection mold usually comprises an injection fixed mold and an injection movable mold. At present, most injection products have buckle structures, and a large number of corresponding inclined ejection pins need to be made according to the direction limitation of the ejection of the injection products. Since there are too many inclined ejection pins and no positioning ejection pin, the injection products will move along the movement direction of the inclined ejection pins when being ejected, so that part of the buckle structures of the injection products cannot be separated from the inclined ejection pins, resulting in that the injection products are difficult to be demolded and taken out. Therefore, an ejection positioning mechanism is needed to position the injection products.

[0003] In the prior art, two ejection mechanisms are usually made in the injection movable mold to position the injection products when being ejected. The ejection mechanism comprises an ejection pin plate, an inclined ejection pin, an ejection ejection pin and a positioning ejection pin. In the first ejection stage, a driving oil cylinder drives the first set of ejection pin plates to move, so as to drive the positioning ejection pin, the ejection ejection pin and the inclined ejection pin to move, so that the inclined ejection pin is separated from the buckle structure of the injection product, and at the same time, the positioning ejection pin can position and fix the injection product. In the second ejection stage, the first set of ejection pin plates stop moving, and at the same time, the positioning ejection pin also stops moving. A driving member drives the second set of ejection pin plates to move, so as to drive the ejection ejection pin to move, thereby ejecting the injection product from the mold core.

[0004] According to the related technology in the above, the inventors believe that two ejection mechanisms need to be made in the injection mold to position the injection products when being ejected, so that the manufacturing process is relatively complicated. CONTENT OF THE UTILITY MODEL

[0005] In order to improve the problem that the two ejection mechanisms are relatively complicated to manufacture, the application provides an injection mold with an ejection positioning mechanism.

[0006] The injection mold with an ejection positioning mechanism provided by the application adopts the following technical scheme:

[0007] An injection mold with an ejection positioning mechanism comprises an ejection pin plate, a positioning ejection pin and a movable mold bottom plate, further comprises a driving sleeve slidably installed on the movable mold bottom plate and an elastic member arranged in the driving sleeve and driving the driving sleeve to always have a tendency to move towards the ejection pin plate. The bottom of the positioning ejection pin is connected with the top of the driving sleeve. The driving sleeve has a first station and a second station. When the driving sleeve is in the first station, the positioning ejection pin is in a reset state. When the driving sleeve is in the second station, the positioning ejection pin is in an ejection state.

[0008] By adopting the technical scheme, when the injection mold is opened, the ejector plate moves upward, the driving sleeve moves upward along with the ejector plate under the driving of the elastic member, so that the top of the positioning ejector can be clamped in the injection product at all times, thereby the positioning ejector can position the injection product when the inclined ejector is separated from the buckle structure of the injection product, and the probability that the injection product moves along with the inclined ejector is reduced. When the injection mold is closed, the ejector plate presses the driving sleeve to the first station, so that the elastic member can lift the driving sleeve upward to make the positioning ejector position the injection product when the injection mold is opened. The injection product can be positioned when the injection product is ejected, and the manufacturing is relatively simple.

[0009] Optionally, the top of the driving sleeve is provided with an ejector fixing seat for arranging the positioning ejector; the ejector fixing seat is radially provided with a fixing groove with a T-shaped cross section; the bottom of the positioning ejector is provided with a clamping protrusion for clamping and matching with the fixing groove.

[0010] By adopting the technical scheme, the connection structure between the driving sleeve and the positioning ejector is disclosed. The cooperation of the fixing groove and the clamping protrusion makes it only necessary to replace the positioning ejector with a corresponding length when different injection products need to be positioned, so that the applicability of the driving sleeve is relatively high.

[0011] Optionally, the bottom of the ejector plate is provided with a pressing groove for arranging the ejector fixing seat; the pressing groove is provided with a pressing annular surface for abutting and matching with the top surface of the ejector fixing seat.

[0012] By adopting the technical scheme, when the ejector plate moves downward to abut against the driving sleeve, the ejector fixing seat can be inserted into the pressing groove, so that the stability of the driving sleeve when moving downward is ideal, and the probability that the driving sleeve moves is reduced.

[0013] Optionally, the movable mold bottom plate is provided with a driving groove for slidingly arranging the driving sleeve; the driving groove sequentially comprises an abutting groove and a sliding groove from bottom to top; the movable mold bottom plate is formed with an abutting surface at the connection of the abutting groove and the sliding groove, and the bottom side wall of the driving sleeve is provided with an abutting annular part for abutting and matching with the abutting surface; when the abutting annular part abuts against the abutting surface, the driving sleeve is in the second station.

[0014] By adopting the technical scheme, the sliding structure between the driving sleeve and the movable mold bottom plate is disclosed. When the elastic member drives the driving sleeve to move upward by a specified distance, the top surface of the abutting annular part can abut against the abutting surface to limit the driving sleeve from continuing to move upward, so that the positioning ejector stops moving. Thereby, the injection product can be ejected by the ejection ejector.

[0015] Optionally, the outer diameter of the driving sleeve is matched with the inner diameter of the sliding groove.

[0016] By adopting the technical scheme, the stability of the driving sleeve when sliding in the sliding groove is ideal by limiting the outer diameter of the driving sleeve and the inner diameter of the sliding groove, which helps to reduce the probability of the driving sleeve from moving.

[0017] Optionally, the outer diameter of the abutting ring part is matched with the inner diameter of the abutting groove.

[0018] By adopting the technical scheme, the stability of the abutting ring part when sliding in the abutting groove is ideal by limiting the outer diameter of the abutting ring part and the inner diameter of the abutting groove, which helps to further reduce the probability of the driving sleeve from moving.

[0019] Optionally, the bottom of the movable mold bottom is provided with a pressing plate groove communicating with the driving groove, and a fixed pressing plate for covering the bottom opening of the driving groove is installed in the pressing plate groove; when the bottom surface of the driving sleeve abuts against the top surface of the fixed pressing plate, the driving sleeve is in the first station.

[0020] By adopting the technical scheme, the setting of the pressing plate groove and the fixed pressing plate makes it only need to disassemble the fixed pressing plate from the pressing plate groove when the positioning pin needs to be replaced, so that the driving sleeve can be disassembled from the driving groove for replacing the positioning pin. This helps to make the replacement of the positioning pin more convenient.

[0021] Optionally, the elastic member is a rectangular spring, the bottom of the elastic member abuts against the top surface of the fixed pressing plate, and the top of the elastic member abuts against the inner top surface of the driving sleeve.

[0022] By adopting the technical scheme, the rectangular spring has greater elasticity than the ordinary spring, which can provide more stable support when the injection-molded product is ejected and positioned.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. An injection mold with an ejection positioning mechanism, by slidingly installing a driving sleeve and an elastic member on a movable mold bottom plate, and connecting the bottom of a positioning pin with the top of the driving sleeve, when the injection mold is opened, the elastic member can lift the driving sleeve upward, thereby lifting the positioning pin upward, to position the injection-molded product when it is ejected;

[0025] 2. By setting a driving groove in the movable mold bottom and an abutting ring part on the sidewall of the bottom of the driving sleeve, when the elastic member lifts the driving sleeve upward by a specified distance, the abutting surface can abut against the abutting ring part to limit the driving sleeve from moving upward, thereby limiting the positioning pin from moving upward, so that the ejection pin can eject the injection-molded product;

[0026] 3. By opening a pressing groove at the bottom of the ejector plate, when the pressing plate moves downward to abut against the driving sleeve, the ejector arrangement seat can be inserted into the pressing groove, thereby helping to reduce the probability of the driving sleeve from shifting during the reset process. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a cross-sectional schematic view of the overall structure of the embodiment of the present application.

[0028] Figure 2 is a partial cross-sectional schematic view of the overall structure in the embodiment of the present application.

[0029] Figure 3 is a structural schematic view of the positioning ejector and the driving sleeve in the embodiment of the present application.

[0030] Figure 4 is a partial enlarged schematic view of A in Figure 2

[0031] BRIEF DESCRIPTION OF REFERENCE NUMERALS: 1, ejector plate; 11, first ejector plate; 111, first positioning through hole; 112, pressing groove; 1121, pressing annular surface; 12, second ejector plate; 121, second positioning through hole; 13, ejector through hole; 2, positioning ejector; 21, ejector main body; 22, limiting portion; 23, clamping protrusion; 3, movable die bottom plate; 31, driving groove; 311, abutment groove; 312, sliding groove; 32, abutment surface; 33, pressing plate groove; 34, fixed pressing plate; 341, bolt through hole; 35, fixed bolt; 4, driving sleeve; 41, ejector fixing seat; 411, fixing groove; 4111, mounting groove; 4112, clamping groove; 42, sleeve main body; 421, arrangement groove; 43, abutment annular portion; 5, elastic member; 6, B plate; 7, lower die core; 8, ejection ejector; 9, inclined ejector. DETAILED DESCRIPTION

[0032] The following will be described in detail in combination with the accompanying Figures 1-4 The present application will be described in further detail.

[0033] The embodiment of the present application discloses an injection mold with an ejection positioning mechanism.

[0034] Reference Figure 1 An injection mold with an ejection positioning mechanism includes an ejector plate 1, a positioning ejector 2, a movable die bottom plate 3, a driving sleeve 4 slidably mounted on the movable die bottom plate 3, an elastic member 5 arranged in the driving sleeve 4, a B plate 6, a lower die core 7 mounted on the B plate, an ejection ejector 8, and an inclined ejector 9.

[0035] Reference Figure 2 ​, the ejector pin plate 1 comprises a first top plate 11 and a second top plate 12 installed on the top surface of the first top plate 11. The first top plate 11 and the second top plate 12 are connected by bolts. Wherein, the first top plate 11 is provided with a first positioning through hole 111 penetrating the upper and lower surfaces, and the second top plate 12 is provided with a second positioning through hole 121 penetrating the upper and lower surfaces and opposite to the first positioning through hole 111, and the first positioning through hole 111 and the second positioning through hole 121 are communicated to form a pin through hole 13 for the positioning ejector pin 2 to slide up and down.

[0036] With reference to Figure 1 and Figure 2 , the bottom of the ejector pin 8 is installed between the first top plate 11 and the second top plate 12, and the top of the ejector pin 8 penetrates to the upper side of the lower mold core 7. The bottom of the inclined ejector pin 9 is installed between the first top plate 11 and the second top plate 12, and the top of the inclined ejector pin 9 penetrates to the upper side of the lower mold core 7.

[0037] With reference to Figure 2 and Figure 3 , the positioning ejector pin 2 comprises a pin body 21, a limiting portion 22 connected to the top of the pin body 21, and a clamping protrusion 23 connected to the bottom of the pin body 21. The pin body 21, the limiting portion 22 and the clamping protrusion 23 are integrally provided.

[0038] With reference to Figure 2 and Figure 4 , the movable mold bottom plate 3 is provided with a driving groove 31 for the driving sleeve 4 to slide up and down, and the driving groove 31 is a through groove structure penetrating the upper and lower surfaces, and comprises an abutting groove 311 and a sliding groove 312 from bottom to top, and the inner diameter of the abutting groove 311 is larger than that of the sliding groove 312. Wherein, the movable mold bottom plate 3 is formed with an abutting surface 32 at the connection between the abutting groove 311 and the sliding groove 312. The bottom of the movable mold bottom plate 3 is also provided with a pressing plate groove 33 communicating with the abutting groove 311, and a fixed pressing plate 34 is installed in the pressing plate groove 33. The fixed pressing plate 34 is fixed in the pressing plate groove 33 by a fixed bolt 35. Wherein, the fixed pressing plate 34 is provided with a bolt through hole 341 for the fixed bolt 35 to arrange.

[0039] With reference to Figure 3 and Figure 4 , the driving sleeve 4 is slidably installed in the driving groove 31 and comprises a pin fixing seat 41, a sleeve body 42 and an abutting ring portion 43 provided on the outer side wall of the bottom of the sleeve body 42 from top to bottom. The pin fixing seat 41, the sleeve body 42 and the abutting ring portion 43 are integrally provided.

[0040] With reference to Figure 3 and Figure 4The fixing seat 41 of the positioning pin 2 is radially provided with a fixing groove 411 penetrating through the two side walls and having a T-shaped cross section. The fixing groove 411 sequentially comprises a mounting groove 4111 and a clamping groove 4112 from top to bottom. The outer diameter of the pin body 21 is adapted to the width of the mounting groove 4111, and the outer diameter of the clamping protrusion 23 is adapted to the width of the clamping groove 4112. When the positioning pin 2 is installed, the clamping protrusion 23 is horizontally clamped into the clamping groove 4112, and then the limiting portion 22 is passed through the pin hole 13.

[0041] With reference to Figure 2 and Figure 4 , in order to reduce the probability of the driving sleeve 4 moving when the positioning pin plate 1 abuts against the fixing seat 41 of the positioning pin 2, the bottom of the first top plate 11 is further provided with a pressing groove 112 communicating with the first positioning hole 111 and used for arranging the fixing seat 41 of the positioning pin 2. The inner diameter of the pressing groove 112 is adapted to the outer diameter of the fixing seat 41 of the positioning pin 2, and the pressing groove 112 has a pressing ring surface 1121 used for abutting against the top surface of the fixing seat 41 of the positioning pin 2. When the positioning pin plate 1 moves downward, the fixing seat 41 of the positioning pin 2 can be inserted into the pressing groove 112, and the pressing ring surface 1121 abuts against the top surface of the fixing seat 41 of the positioning pin 2. When the positioning pin plate 1 presses the driving sleeve 4 downward so that the bottom surface of the driving sleeve 4 abuts against the top surface of the fixing plate 34, the driving sleeve 4 is in the first station, and at this time, the positioning pin 2 is in the reset state.

[0042] With reference to Figure 3 and Figure 4 , the outer diameter of the sleeve body 42 is adapted to the inner diameter of the sliding groove 312, and the sleeve body 42 has an arrangement groove 421 with an open bottom end and used for arranging the elastic member 5. When the elastic member 5 is arranged in the arrangement groove 421, the top of the elastic member 5 abuts against the top surface of the arrangement groove 421, and the top of the elastic member 5 abuts against the top surface of the fixing plate 34, so as to drive the driving sleeve 4 to always have a tendency to move toward the positioning pin plate 1. The elastic member 5 is a rectangular spring. When the positioning pin plate 1 moves upward, the driving sleeve 4 can move upward synchronously with the positioning pin plate 1 under the driving of the elastic member 5, and in the moving process, the limiting portion 22 of the positioning pin 2 always supports the injection molded product, so as to position the injection molded product.

[0043] With reference to Figure 1 and Figure 4 , the abutting ring portion 43 is coaxially arranged on the sleeve body 42, and the outer diameter of the abutting ring portion 43 is adapted to the inner diameter of the abutting groove 311. When the positioning pin plate 1 moves upward, the driving sleeve 4 moves upward synchronously with the positioning pin plate 1 under the driving of the elastic member 5, and when the upper end surface of the abutting ring portion 43 abuts against the abutting surface 32, the driving sleeve 4 is in the first station, at this time, the limiting portion 22 of the positioning pin 2 extends to the outside from the lower mold core 7 and stops moving, and the positioning pin 2 is in the ejection state.

[0044] With reference to Figures 1 to 4The implementation principle of the injection mold with the ejection positioning mechanism is as follows: when the injection mold is opened, the ejector plate 1 moves upward, the driving sleeve 4 moves upward synchronously under the driving of the elastic member 5, the positioning ejector pin 2 moves upward synchronously, the injection product is positioned, and the inclined ejector pin 9 gradually separates from the buckle structure of the injection product. After the inclined ejector pin 9 separates from the buckle structure of the injection product, the abutting surface 32 can abut against the bottom of the abutting ring part 43 to limit the positioning ejector pin 2 from continuously moving upward, so that the ejection ejector pin 8 can eject the injection product. After the injection product is ejected, the ejector plate 1 moves downward, the driving sleeve 4 is pressed downward, and the driving sleeve 4 is in the first station.

[0045] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. An injection mold with ejection positioning mechanism, comprising an ejector plate (1), a positioning ejector pin (2) and a movable mold base plate (3), characterized in that, Also included are a driving sleeve (4) slidingly mounted on the movable die base plate (3) and an elastic member (5) arranged in the driving sleeve (4) and driving the driving sleeve (4) to always have a tendency to move towards the ejector plate (1); the bottom of the positioning ejector pin (2) is connected with the top of the driving sleeve (4); the driving sleeve (4) has a first position and a second position, when the driving sleeve (4) is in the first position, the positioning ejector pin (2) is in a reset state; when the driving sleeve (4) is in the second position, the positioning ejector pin (2) is in an ejecting state.

2. An injection mold having an ejection positioning mechanism according to claim 1, wherein The top of the driving sleeve (4) has an ejector pin fixing seat (41) for arranging the positioning ejector pin (2); the ejector pin fixing seat (41) is radially provided with a fixing groove (411) with a T-shaped cross section; the bottom of the positioning ejector pin (2) is provided with a clamping protrusion (23) for clamping and matching with the fixing groove (411).

3. An injection mold having an ejection positioning mechanism according to claim 2, wherein The bottom of the ejector plate (1) is provided with a pressing groove (112) for arranging the ejector pin fixing seat (41); the pressing groove (112) has a pressing annular surface (1121) for abutting and matching with the top surface of the ejector pin fixing seat (41).

4. An injection mold having an ejection positioning mechanism according to claim 1, wherein The movable die base plate (3) has a driving groove (31) for slidingly arranging the driving sleeve (4); the driving groove (31) sequentially includes an abutting groove (311) and a sliding groove (312) from bottom to top; the movable die base plate (3) is formed with an abutting surface (32) at the connection of the abutting groove (311) and the sliding groove (312), the bottom side wall of the driving sleeve (4) is provided with an abutting annular part (43) for abutting and matching with the abutting surface (32); when the abutting annular part (43) abuts with the abutting surface (32), the driving sleeve (4) is in the second position.

5. An injection mold having an ejection positioning mechanism according to claim 4, wherein The outer diameter of the driving sleeve (4) is adapted to the inner diameter of the sliding groove (312).

6. An injection mold having an ejection positioning mechanism according to claim 4, wherein The outer diameter of the abutting annular part (43) is adapted to the inner diameter of the abutting groove (311).

7. An injection mold having an ejection positioning mechanism according to claim 4, wherein The bottom of the movable die base plate is provided with a pressing plate groove (33) communicating with the driving groove (31) and a fixed pressing plate (34) is mounted in the pressing plate groove (33) for covering the bottom opening of the driving groove (31); when the bottom surface of the driving sleeve (4) abuts with the top surface of the fixed pressing plate (34), the driving sleeve (4) is in the first position.

8. An injection mold having an ejection positioning mechanism according to claim 7, wherein The elastic member (5) is a rectangular spring, the bottom of the elastic member (5) abuts with the top surface of the fixed pressing plate (34), and the top of the elastic member (5) abuts with the inner top surface of the driving sleeve (4).

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