Injection mold for plastic parts

Abstract

The utility model discloses a kind of plastic injection mould, it includes cooling oil tank, the cooling oil tank top is equipped with limiting window, limiting window is equipped with bottom mould in through installation, the top die of bottom mould top end is installed;Cooling oil tank, the cooling oil tank rear end outer wall bottom is fixed with servo motor, eccentric column is installed on the output shaft of servo motor, eccentric column both ends and bottom frame inner wall both ends are pasted;Bottom frame, the bottom frame top end and bottom mould outer wall bottom surface connection fixed, support cylinder is rotatably installed in the bottom end of bottom frame, the bottom end of support cylinder and the bottom surface of the inner wall of cooling oil tank are pasted.The plastic injection mould of this application adopts new structure design, cooperates with the cooling water channel of random shape by immersion liquid cooling mechanism, substantially improves cooling efficiency, and drives mould small amplitude horizontal vibration when cooling, promotes product stripping by vibration, reduces the production cost of mould.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold for plastic parts. Background Technology

[0002] Plastic injection molds are special molds used to produce plastic products with complex geometries, asymmetrical structures, or special functional requirements. They are complex in shape and are generally used in fields such as automotive parts, home appliance housings, medical devices, and consumer electronics.

[0003] Existing plastic injection molds require ejection mechanisms for demolding. These mechanisms are not only complex but also need to be customized according to the cavity, resulting in high production costs and a relatively high failure rate. Furthermore, the cooling efficiency of traditional conformal cooling channels needs improvement. Therefore, a new type of plastic injection mold needs to be designed to address these issues. Utility Model Content

[0004] The purpose of this utility model is to provide a plastic injection mold to solve at least one technical problem existing in the above-mentioned background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A plastic injection mold, comprising:

[0007] A cooling oil tank, wherein a limiting window is provided on the top of the cooling oil tank, a bottom mold is installed through the limiting window, and a top mold is installed on the top of the bottom mold;

[0008] A cooling oil tank, wherein a servo motor is fixed to the bottom of the outer wall at the rear end of the cooling oil tank, and an eccentric column is mounted on the output shaft of the servo motor, wherein the two ends of the eccentric column are in contact with the two ends of the inner wall of the bottom frame;

[0009] The bottom frame is connected and fixed to the bottom surface of the outer wall of the bottom mold at its top end, and a support roller is rotatably installed at the bottom end of the bottom frame, with the bottom end of the support roller in contact with the bottom surface of the inner wall of the cooling oil tank.

[0010] Preferably, a base plate is fixedly installed on the top of the outer side wall of the bottom mold, and a drag-reducing roller is rotatably installed on the bottom end of the base plate, with the bottom end of the drag-reducing roller in contact with the top outer side of the cooling oil tank.

[0011] Preferably, the side view length of the drag-reducing roller is greater than 3 / 4 of the side view length of the bottom mold, and the front and rear sides of the bottom mold are respectively fitted to the front and rear sides of the limiting window.

[0012] Preferably, stabilizing rods are fixedly installed on both sides of the outer wall of the bottom mold below the substrate. The stabilizing rods are in contact with the inner wall of the stabilizing hole, and the stabilizing hole is opened on the inner wall of the limiting window.

[0013] Preferably, the stabilizer bar and the stabilizer hole are slidably connected, and the stabilizer bar and the stabilizer hole are evenly spaced.

[0014] Preferably, a lower circulation pipe is installed at the bottom of one side of the cooling oil tank, and an upper circulation pipe is installed at the top of one side of the cooling oil tank.

[0015] Preferably, the top mold has an upper cavity, and the top mold above the upper cavity has a conformal flow channel, with a top circulation pipe installed at the end of the conformal flow channel.

[0016] Preferably, the eccentric columns are symmetrically distributed about the center of the output shaft of the servo motor, and the two ends of the output shaft of the servo motor are connected to the side wall of the cooling oil tank through sealed bearings.

[0017] Preferably, the diameter of the eccentric column is equal to the inner width of the bottom frame, and the bottom frame is symmetrically distributed about the center of the bottom mold.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] The new structural design, combined with the immersion liquid cooling mechanism and conformal cooling channels, greatly improves the cooling efficiency and drives the mold to vibrate slightly horizontally during cooling. The vibration promotes product demolding and reduces the production cost of the mold.

[0020] 1. This utility model uses the structural design of cooling oil tank, lower circulation pipe and upper circulation pipe to carry out large-area immersion cooling of bottom mold, and with the conformal flow channel set in top mold, it can efficiently cool the product inside the mold and facilitate demolding.

[0021] 2. This utility model uses a servo motor to drive an eccentric column to rotate stably in one direction. By extruding the bottom frame, it causes the bottom mold, top mold, and substrate to vibrate slightly horizontally. With the support of the drag-reducing roller and the support roller, it ensures the smooth and continuous movement of the bottom mold, top mold, and substrate, and vibrates the products in the bottom mold and top mold to demold. It can also promote the flow of cooling oil and further improve the cooling efficiency. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a front view cross-sectional structural diagram of the cooling oil tank and base plate of this utility model.

[0024] Figure 3 This is a frontal cross-sectional view of the top mold of this utility model.

[0025] Figure 4 This is a side sectional view of the limiting window and bottom frame of this utility model.

[0026] Figure 5 This is a side view cross-sectional structural diagram of the contact area between the stabilizer bar and the stabilizer hole of this utility model.

[0027] In the diagram: 1. Cooling oil tank; 2. Limiting window; 3. Bottom mold; 4. Top mold; 5. Base plate; 6. Drag-reducing roller; 7. Stabilizing rod; 8. Stabilizing hole; 9. Lower circulation pipe; 10. Upper circulation pipe; 11. Servo motor; 12. Eccentric column; 13. Bottom frame; 14. Support roller; 15. Upper cavity; 16. Conformal flow channel; 17. Top circulation pipe. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0029] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figure 1-5 One embodiment provided by this utility model:

[0033] A plastic injection mold, comprising:

[0034] A cooling oil tank 1 has a limiting window 2 at its top. A bottom mold 3 is installed through the limiting window 2, and a top mold 4 is installed at the top of the bottom mold 3. A base plate 5 is fixedly installed on the top of the outer wall of the bottom mold 3. A drag-reducing roller 6 is rotatably installed at the bottom end of the base plate 5. The bottom end of the drag-reducing roller 6 is in contact with the top outer surface of the cooling oil tank 1. The above structural design can support the bottom mold 3 and the top mold 4, ensuring that the bottom mold 3 and the top mold 4 can move stably horizontally under the support of the base plate 5 and the drag-reducing roller 6. The side view length of the drag-reducing roller 6 is greater than 3 / 4 of the side view length of the bottom mold 3. The front and rear sides of the bottom mold 3 are respectively connected to the front and rear sides of the limiting window 2. The above-mentioned structural design ensures that the drag-reducing roller 6 can stably support the substrate 5, the bottom mold 3, and the top mold 4, and ensures that the bottom mold 3 can slide stably along the limiting window 2. The bottom mold 3 under the substrate 5 has stabilizing rods 7 fixedly installed on both sides of its outer wall. The stabilizing rods 7 are in contact with the inner wall of the stabilizing hole 8, which is opened on the inner wall of the limiting window 2. The above-mentioned structural design can improve the stability of the bottom mold 3 and the top mold 4 when moving horizontally. The stabilizing rods 7 and the stabilizing holes 8 are slidably connected and are evenly spaced. The above-mentioned structural design allows the bottom mold 3 to slide stably in a straight line along the stabilizing hole 8 with the stabilizing rods 7 when moving horizontally.

[0035] Cooling oil tank 1, a servo motor 11 is fixed to the bottom of the outer wall of the rear end of the cooling oil tank 1, an eccentric column 12 is installed on the output shaft of the servo motor 11, and the two ends of the eccentric column 12 are attached to the two ends of the inner wall of the bottom frame 13.

[0036] The bottom frame 13 is connected and fixed to the bottom surface of the outer wall of the bottom mold 3 at its top end. A support roller 14 is rotatably installed at the bottom end of the bottom frame 13, and the bottom end of the support roller 14 is in contact with the bottom surface of the inner wall of the cooling oil tank 1.

[0037] In one embodiment, a lower circulation pipe 9 is installed at the bottom of one side of the cooling oil tank 1, and an upper circulation pipe 10 is installed at the top of one side of the cooling oil tank 1. The above structural design enables the cooling oil to smoothly enter and exit the cooling oil tank 1 for efficient circulation.

[0038] In one preferred embodiment, the top mold 4 has an upper cavity 15, and the top mold 4 above the upper cavity 15 has a conformal flow channel 16. A top circulation pipe 17 is installed at the end of the conformal flow channel 16. The above structural design can efficiently cool the product in the top mold 4.

[0039] In one embodiment, the eccentric column 12 is symmetrically distributed about the output shaft of the servo motor 11. The two ends of the output shaft of the servo motor 11 are connected to the side wall of the cooling oil tank 1 through sealed bearings. The above structural design enables the servo motor 11 to stably drive the eccentric column 12 to rotate through the output shaft, and there is no leakage at the connection between the output shaft of the servo motor 11 and the cooling oil tank 1.

[0040] In one preferred embodiment, the diameter of the eccentric column 12 is equal to the inner width of the bottom frame 13. The bottom frame 13 is symmetrically distributed about the center of the bottom mold 3. The above structural design enables the eccentric column 12 to always fit against the inner side of the bottom frame 13 when rotating, so as to stably compress the bottom frame 13 and drive the bottom frame 13 and the bottom mold 3 to move horizontally back and forth.

[0041] The working principle of this utility model is as follows: the internal mechanisms of the bottom mold 3 and the top mold 4, as well as the matching locking and pouring mechanisms, are the same as those of existing injection molds. They are existing mature technologies and are well known to those skilled in the art, so they will not be described in detail here.

[0042] During production, there is no cooling oil in the cooling oil tank 1. The servo motor 11 locks the eccentric column 12 through the output shaft. The eccentric column 12 locks the positions of the bottom mold 3 and the top mold 4 through the bottom frame 13 to ensure normal injection molding. When cooling and demolding are required after injection molding, cooling oil is pumped into the cooling oil tank 1 and the conformal flow channel 16 through the external cooling oil pumps connected to the upper circulation pipe 10 and the top circulation pipe 17, respectively. The cooling oil in the cooling oil tank 1 immerses and cools the bottom mold 3, and the cooling oil in the conformal flow channel 16 cools the part of the product in the upper cavity 15.

[0043] Simultaneously, servo motor 11 is started, and servo motor 11 drives eccentric column 12 to rotate stably in one direction. Figure 2 When the eccentric column 12 rotates in one direction, it utilizes its eccentric installation characteristic to first squeeze the bottom frame 13 to the right and then squeeze the bottom frame 13 to the left to reset. Under the support of the support roller 14 and the drag-reducing roller 6, the bottom frame 13, along with the bottom mold 3, the top mold 4 and the base plate 5, undergoes small horizontal reciprocating vibration along the limiting window 2. The base plate 5, along with the drag-reducing roller 6, rolls stably along the top surface of the cooling oil tank 1. The bottom mold 3, along with the stabilizing rod 7, slides stably in a straight line along the stabilizing hole 8. The vibration promotes the demolding of the product in the bottom mold 3 and the top mold 4, and promotes the flow of cooling oil in the cooling oil tank 1, thereby improving the cooling demolding efficiency.

[0044] After cooling is complete, the servo motor 11 locks the eccentric column 12 again, the bottom mold 3 and the top mold 4 are fixed, the cooling oil in the cooling oil tank 1 and the conformal flow channel 16 is discharged, and the top mold 4 is opened to demold the product.

[0045] The above description is merely an embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A plastic injection mold, characterized in that, It includes: A cooling oil tank (1) is provided with a limiting window (2) on the top of the cooling oil tank (1). A bottom mold (3) is installed through the limiting window (2), and a top mold (4) is installed on the top of the bottom mold (3). Cooling oil tank (1), a servo motor (11) is fixed at the bottom of the outer wall of the rear end of the cooling oil tank (1), and an eccentric column (12) is installed on the output shaft of the servo motor (11). The two ends of the eccentric column (12) are attached to the two ends of the inner wall of the bottom frame (13). The bottom frame (13) is connected and fixed to the bottom surface of the outer wall of the bottom mold (3) at its top end. A support roller (14) is rotatably installed at the bottom end of the bottom frame (13). The bottom end of the support roller (14) is in contact with the bottom surface of the inner wall of the cooling oil tank (1).

2. The injection mold for a plastic part according to claim 1, characterized in that: A base plate (5) is fixedly installed on the top of the outer side wall of the bottom mold (3), and a drag-reducing roller (6) is rotatably installed at the bottom end of the base plate (5). The bottom end of the drag-reducing roller (6) is in contact with the top outer side of the cooling oil tank (1).

3. A plastic injection mold according to claim 2, characterized in that: The side length of the drag-reducing roller (6) is greater than 3 / 4 of the side length of the bottom mold (3), and the front and rear sides of the bottom mold (3) are respectively attached to the front and rear sides of the limiting window (2).

4. A plastic injection mold according to claim 2, characterized in that: Stabilizing rods (7) are fixedly installed on both sides of the outer wall of the bottom mold (3) below the substrate (5). The stabilizing rods (7) are in contact with the inner wall of the stabilizing hole (8). The stabilizing hole (8) is opened on the inner wall of the limiting window (2).

5. A plastic injection mold according to claim 4, characterized in that: The stabilizer (7) and the stabilizer hole (8) are slidably connected, and the stabilizer (7) and the stabilizer hole (8) are evenly spaced.

6. A plastic injection mold according to claim 1, characterized in that: A lower circulation pipe (9) is installed at the bottom of one side of the cooling oil tank (1), and an upper circulation pipe (10) is installed at the top of one side of the cooling oil tank (1).

7. A plastic injection mold according to claim 1, characterized in that: The top mold (4) has an upper cavity (15) inside, and the top mold (4) above the upper cavity (15) has a conformal flow channel (16) inside, and a top circulation pipe (17) is installed at the end of the conformal flow channel (16).

8. A plastic injection mold according to claim 1, characterized in that: The eccentric column (12) is symmetrically distributed about the output shaft of the servo motor (11), and the two ends of the output shaft of the servo motor (11) are connected to the side wall of the cooling oil tank (1) through sealed bearings.

9. A plastic injection mold according to claim 1, characterized in that: The diameter of the eccentric column (12) is equal to the inner width of the bottom frame (13), and the bottom frame (13) is symmetrically distributed about the center of the bottom mold (3).

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