Core-pulling injection mold based on rollers
By using the roller-driven flip plate compression slide design in the injection mold, the movement error and wear of the side mold core are solved, the production and maintenance costs are reduced, and the efficient forming and demolding of the injection molded parts are achieved.
Patent Information
- Application Number
- CN202420712806.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-09
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-09
AI Technical Summary
During the mold closing and opening of existing injection molds, the movement error of the side mold core is large, resulting in high production and maintenance costs and easy wear.
The roller-based core injection mold design is adopted. The roller drives the flip plate to press the slider to make the side mold core move downward and form, and the slider resets and moves upward when the mold is opened to avoid the demolding of the injection molded parts. The roller and Rolling contact of the flip plate reduces wear.
The smooth movement of the side mold pulling core during the mold closing and opening process is achieved, which reduces production and maintenance costs, reduces wear, and improves the processing accuracy and service life of the mold.
Smart Images
Figure CN222201470U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of injection molds, in particular to a core-pulling injection mold based on a roller. Background Art
[0002] Some injection molded parts have holes or grooves on their sides. It is necessary to add a side draw mold core on the basis of the mold core to form the holes or grooves on the side of the injection molded parts. In order to facilitate the demoulding of the injection molded parts, the side draw mold core needs to be moved outward after the mold is opened to avoid obstruction to the demoulding of the injection molded parts.
[0003] In the prior art, the inclined guide pin is mostly used to cooperate with the inclined hole in the slider, and the slider is slid during the mold closing and opening process, and the slider is used to drive the movement of the side draw mold core. The inclined guide pin and the inclined hole in the slider are precisely matched, which requires high mold processing accuracy, increases the production cost of the mold, and the contact between the inclined guide pin and the inside of the inclined hole in the slider is sliding friction, which is easy to wear, resulting in movement error of the side draw mold core, increasing the maintenance cost, and needs to be improved. Utility Model Content
[0004] The main technical problem solved by the utility model is to provide a core-pulling injection mold based on a roller, so as to realize the movement of the side-pulling mold core during the mold closing and mold opening processes, thereby reducing the production and maintenance costs.
[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a core-pulling injection mold based on a roller, comprising: a movable mold assembly, a fixed mold assembly, a roller and a flap, the movable mold assembly is relatively distributed with the fixed mold assembly, the fixed mold assembly comprises a fixed mold seat and a fixed mold plate, the fixed mold plate is arranged on the front of the fixed mold seat, the movable mold assembly comprises a movable mold seat, a movable mold plate, a movable mold core, a slider and a side-pulling mold core, the movable mold plate is arranged on the front of the movable mold seat and faces the fixed mold plate, the movable mold core is arranged in the movable mold plate, the slider can be slid up and down in the movable mold plate and is located above the movable mold core, the side-pulling mold core is arranged at the bottom of the slider, the roller is arranged on the front of the slider, the fixed mold plate is concavely provided with an avoidance groove corresponding to the roller, a rotating shaft is arranged in the avoidance groove, the flap can be flipped and arranged on the rotating shaft, the lower part of the flap is located in front of the roller, when the movable mold assembly is molded with the fixed mold assembly, the roller moves forward and contacts with the lower part of the flap to drive the upper part of the flap to turn outward, and the slider is pressed downward by turning outward the upper part of the flap.
[0006] In a preferred embodiment of the present utility model, the top surface of the movable mold core is concavely provided with a positioning groove corresponding to the bottom end of the side draw mold core.
[0007] In a preferred embodiment of the present invention, the rotating shaft is parallel to the axis of the roller, and the rotating shaft is located above the front side of the axis of the roller.
[0008] In a preferred embodiment of the utility model, a fixing plate extending to above the sliding block is arranged on the movable plate, and a guide rod penetrating upwardly through the fixing plate is arranged on the top of the sliding block.
[0009] In a preferred embodiment of the utility model, the guide rod is provided with a nut and a spring located above the fixing plate, the spring is located below the nut, and the guide rod is provided with a section of external thread corresponding to the nut.
[0010] In a preferred embodiment of the present invention, the number of the guide rods is at least 2.
[0011] In a preferred embodiment of the present invention, the fixing plate is provided with screws connected to the movable platen.
[0012] In a preferred embodiment of the present invention, the distance between the top end of the flap and the rotating shaft is smaller than the distance between the bottom end of the flap and the rotating shaft.
[0013] The beneficial effects of the utility model are as follows: the utility model points out a roller-based core-pulling injection mold, during the mold closing process, the roller moves forward so that the upper part of the flap is turned outward to press the slider downward, driving the side draw mold core to move downward and cooperate with the movable mold core, which is beneficial to the molding of the side holes or grooves of the injection molded part; after the mold is opened, the roller moves backward, the slider loses the pressure of the flap and moves upward to reset, driving the side draw mold core to move upward, which does not affect the demoulding of the injection molded part, and the roller and the flap are in rolling contact, which reduces wear and maintenance costs, and the processing cost of the roller and the flap is also relatively low. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:
[0015] Figure 1 This is a schematic diagram of the mold opening structure of a preferred embodiment of a core-pulling injection mold based on a roller of the utility model;
[0016] Figure 2 The utility model is a schematic diagram of the mold closing structure of a preferred embodiment of a core-pulling injection mold based on a roller. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0018] See also Figure 1~Figure 2 , the utility model embodiment includes:
[0019] like Figure 1 The roller-based core-pulling injection mold shown includes: a movable mold assembly 2, a fixed mold assembly 1, a roller 3 and a flap 4. The movable mold assembly 2 is arranged opposite to the fixed mold assembly 1 and is installed on the injection molding machine. The fixed mold assembly 1 includes a fixed mold base 11 and a fixed mold plate 12. The fixed mold plate 12 is arranged on the front of the fixed mold base 11. In this embodiment, the movable mold assembly includes a movable mold base 21, a movable mold plate 22, a movable mold core 23, a slider 24 and a side mold core 25. The movable mold plate 22 is arranged on the front of the movable mold base 21 and faces the fixed mold plate 12. The mold is closed and opened by moving the movable mold assembly 2.
[0020] The movable mold core 23 is set in the movable mold plate 22, the slider 24 is slidably set in the movable mold plate 22 and is located above the movable mold core 23, the side draw mold core 25 is set at the bottom of the slider 24, the side draw mold core 25 moves up and down with the slider 24, and the side draw mold core 25 moves down to cooperate with the movable mold core 23, which is beneficial to the molding of the side holes or grooves of the injection molded parts.
[0021] The roller 3 is arranged on the front of the slider 24 and moves with the slider 24. The roller 3 can be fixed on the front of the slider 24 by the corresponding wheel seat and bolts, which is convenient for disassembly and assembly. The fixed mold plate 12 is provided with an escape groove 13 corresponding to the roller 3, which does not affect the forward movement of the roller 3 during mold closing. The escape groove 13 is provided with a rotating shaft 5, and the flap 4 is arranged on the rotating shaft 5 in a flippable manner, such as Figure 1 As shown, the lower part of the flap 4 is located in front of the roller 3, and the roller 3 first contacts the lower part of the flap 4 when the slider 24 moves forward during the mold closing process.
[0022] In this embodiment, the rotating shaft 5 is parallel to the axis of the roller 3, and the rotating shaft 5 is located above the front side of the axis of the roller 3, ensuring that the roller 3 first contacts the lower part of the flap 4 during the mold closing process. In addition, the roller 3 and the flap 4 are in rolling contact, which reduces wear and maintenance costs. The roller 3 can use a rolling bearing, which has good high temperature resistance and low purchase cost.
[0023] like Figure 2As shown, when the movable mold assembly 2 and the fixed mold assembly 1 are molded together, the roller 3 moves forward and contacts the lower part of the flap 4 to drive the upper part of the flap 4 to turn outward, and the slider 24 is pressed downward by the upper part of the flap 4 turning outward. In this embodiment, the top surface of the movable mold core 23 is concavely provided with a positioning groove corresponding to the bottom end of the side-drawing mold core 25. The side-drawing mold core 25 moves downward with the slider 24, and the bottom end of the side-drawing mold core 25 enters the positioning groove on the top surface of the movable mold core 23, and the fit is tight, which is convenient for injection molding.
[0024] like Figure 1 As shown, the distance between the top of the flap 4 and the rotating shaft 5 is smaller than the distance between the bottom of the flap 4 and the rotating shaft 5. After the mold is opened, it is convenient for the bottom of the flap 4 to flip down and reset under the action of gravity. In order to move the slider 24 upward and reset, a fixed plate 7 extending above the slider 24 is provided on the movable plate 22. In this embodiment, the fixed plate 7 is provided with screws 6 connected to the movable plate 22, which has a firm structure and is easy to assemble.
[0025] A guide rod 25 is provided on the top of the slider 24 and passes through the fixing plate 7 upward. There are at least two guide rods 25, which improves the stability of the slider 24 moving up and down. A nut 8 and a spring 9 are provided on the guide rod 25 and are located above the fixing plate. Figure 1 As shown, the spring 9 is located below the nut 8, and a section of external thread corresponding to the nut 8 is provided on the guide rod 25, which is convenient for the installation and adjustment of the nut 8 to realize the pre-compression of the spring 9. After the mold is opened, the nut 8, the guide rod 25 and the slider 24 are actively moved up and reset under the action of the spring 9, which is beneficial to the separation of the side drawing mold core 25 and the movable mold core 23 and the demolding of the injection molded part from the movable mold core 23.
[0026] In summary, the roller-based core-pulling injection mold disclosed in the utility model does not require an inclined guide column, nor does it need to machine an inclined hole in the slider that precisely matches the inclined guide column, which greatly reduces the production cost of the mold and facilitates maintenance.
[0027] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A core-pulling injection mold based on a roller, characterized in that: include: A movable mold assembly, a fixed mold assembly, a roller and a flap, wherein the movable mold assembly is relatively distributed with the fixed mold assembly, the fixed mold assembly comprises a fixed mold base and a fixed mold plate, the fixed mold plate is arranged on the front of the fixed mold base, the movable mold assembly comprises a movable mold base, a movable mold plate, a movable mold core, a slider and a side-drawing mold core, the movable mold plate is arranged on the front of the movable mold base and faces the fixed mold plate, the movable mold core is arranged in the movable mold plate, the slider is slidably arranged in the movable mold plate and is located above the movable mold core, the side-drawing mold core is arranged at the bottom of the slider, the roller is arranged on the front of the slider, an avoidance groove corresponding to the roller is concavely arranged on the fixed mold plate, a rotating shaft is arranged in the avoidance groove, the flap can be flipped on the rotating shaft, and the lower part of the flap is located in front of the roller, when the movable mold assembly is molded with the fixed mold assembly, the roller moves forward and contacts with the lower part of the flap to drive the upper part of the flap to flip outward, and the slider is pressed downward by the flipping outward of the upper part of the flap.
2. The roller-based core-pulling injection mold according to claim 1, characterized in that: The top surface of the movable mold core is concavely provided with a positioning groove corresponding to the bottom end of the side draw mold core.
3. The roller-based core-pulling injection mold according to claim 1, characterized in that: The rotating shaft is parallel to the axis of the roller, and is located above the front side of the axis of the roller.
4. The roller-based core-pulling injection mold according to claim 1, characterized in that: The movable template is provided with a fixed plate extending above the sliding block, and the top of the sliding block is provided with a guide rod penetrating upwardly through the fixed plate.
5. The roller-based core-pulling injection mold according to claim 4, characterized in that: The guide rod is provided with a nut and a spring located above the fixing plate, the spring is located below the nut, and the guide rod is provided with a section of external thread corresponding to the nut.
6. The roller-based core-pulling injection mold according to claim 4, characterized in that: The number of the guide rods is at least 2.
7. The roller-based core-pulling injection mold according to claim 4, characterized in that: The fixing plate is provided with screws connected with the movable template.
8. The roller-based core-pulling injection mold according to claim 1, characterized in that: The distance between the top end of the flap and the rotating shaft is smaller than the distance between the bottom end of the flap and the rotating shaft.