Flash-free plastic mold

Abstract

The utility model relates to the technical field of injection molds, in particular to a flash-free plastic mold which comprises a fixed mold, a movable mold and second connecting columns, second fixing plates are symmetrically installed on the outer walls of the two sides of the movable mold, first connecting columns are installed on the outer walls of the lower ends of the second fixing plates, first fixing plates are symmetrically installed on the two sides of the fixed mold, and second fixing plates are symmetrically installed on the first connecting columns. A supporting column is installed on one side of the outer wall of the upper end of the first fixing plate, a pressure sensor is installed on the outer wall of the upper end of the supporting column, a second connecting column is installed on the outer wall of the upper end of the pressure sensor, an embedding groove is formed in the outer wall of the upper end of the second connecting column, and a flow channel is formed in the lower end of the inner wall of the embedding groove. An external connection pipe is installed on the outer wall of one side of the second connection column in an inserted mode, the detection accuracy of the mold clamping force of the mold is improved, the misjudgment probability is reduced, the forming quality of a workpiece is improved, a worker can be helped to adjust or maintain related data of equipment in time according to detection data, and therefore the purpose that the formed workpiece is free of flash can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a flash-free plastic mold. Background Art

[0002] Plastic molds are tools used to give plastic products complete configurations and precise dimensions. Among them, the most commonly used plastic molding molds are injection molds, extrusion molds and compression molds. Among them, injection molds are the most commonly used molds in the production of thermoplastic plastic parts. Their working principle is that the plastic is heated and melted in the heating barrel at the bottom of the injection machine, and then pushed by the screw or plunger of the injection machine, into the mold cavity through the nozzle and the pouring system of the mold, and demolded after cooling and hardening. Flash mostly occurs at the separation and combination positions of the mold, such as the parting surface of the dynamic mold and the static mold, the sliding part of the slider, the absolute gap of the insert, the hole of the ejector pin, etc. Flash is largely caused by the failure of the clamping force of the mold or the machine. Therefore, a clamping force detection device will be added to the outside of the mold to monitor the clamping force of the mold in real time. The commonly used detection sensor is a pressure sensor.

[0003] Although the injection molds of the prior art have many benefits during use, they still have the following problems: the detection of the clamping force is not perfect. During the use of the detection structure, dust particles in the air or debris of the injection molded workpiece will fall on the surface of the detection structure, affecting the contact tightness between the detection structures, thereby affecting the detection accuracy of the mold clamping force, easily causing misjudgment and affecting the molding quality of the workpiece. Utility Model Content

[0004] In view of the problems in the prior art, the utility model provides a plastic mold without flash.

[0005] The technical solution adopted by the utility model to solve its technical problems is a flash-free plastic mold, including a fixed mold, a movable mold and a second connecting column. The outer wall of the upper end of the fixed mold is provided with a movable mold, and a mold cavity is opened on one side of the outer wall of the upper end of the fixed mold. The outer walls on both sides of the movable mold are symmetrically installed with second fixed plates, and the outer wall of the lower end of the second fixed plate is installed with a first connecting column. The first fixed plates are symmetrically installed on both sides of the fixed mold, and a support column is installed on one side of the outer wall of the upper end of the first fixed plate. A pressure sensor is installed on the outer wall of the upper end of the support column, and a second connecting column is installed on the outer wall of the upper end of the pressure sensor. An engaging groove is opened on the outer wall of the upper end of the second connecting column, and a flow channel is opened on the lower end of the inner wall of the engaging groove. An external pipe is plugged into the outer wall of one side of the second connecting column.

[0006] By adopting the above technical solution, the external power structure drives the movable mold to move, thereby closing the movable mold and the fixed mold, and the molten material flows into the mold cavity through the injection port. The molding shape of the material is controlled by the mold cavity and the mold core, and the pressure sensor detects the clamping force when the movable mold and the fixed mold are closed.

[0007] Specifically, a mold core is installed on one side of the outer wall of the lower end of the movable mold, and the mold core is located inside the mold cavity. The outer wall of the upper end of the fixed mold is provided with limiting columns distributed in a rectangular array, and the limiting columns are located inside the movable mold.

[0008] By adopting the above technical solution, the mold cavity and the mold core can control the molding shape of the molten material, and the limit column ensures the accuracy of the clamping position of the movable mold and the fixed mold.

[0009] Specifically, an injection port is provided on one side of the outer wall of the upper end of the movable mold, and the injection port is communicated with the interior of the mold cavity.

[0010] By adopting the above technical solution, the molten material enters the mold cavity through the injection port, and the molten material fills the mold cavity, thereby performing feeding.

[0011] Specifically, a fitting block is installed on the outer wall of the lower end of the first connecting column, the outer wall of the fitting block and the inner wall of the fitting groove are both designed in a conical shape, and the fitting block is located inside the fitting groove.

[0012] By adopting the above technical solution, the engaging block enters the engaging groove, connecting the first connecting column and the second connecting column, so that the movable mold drives the first connecting column to squeeze the second connecting column. Through the detection data of the pressure sensor, the clamping force between the movable mold and the fixed mold can be measured.

[0013] Specifically, a sealing ring is fixedly attached to the outer wall of the lower end of the first connecting column, and the sealing ring is in contact with the upper end surface of the second connecting column.

[0014] By adopting the above technical solution, after the engaging block is completely inserted into the engaging groove, the sealing ring is squeezed against the upper end surface of the second connecting column, thereby maintaining the sealing of the engaging groove and preventing continuous outflow of air.

[0015] Specifically, the external pipe is connected to the flow channel, and a flow rate sensor is provided on an outer wall of one side of the external pipe. The flow rate sensor is located outside the second connecting column.

[0016] By adopting the above technical solution, the flow rate sensor detects the air flow rate inside the external pipe and controls the external air pump to stop according to the detection data.

[0017] Beneficial effects of the utility model:

[0018] (1) The flashless plastic mold described in the present invention has an external power structure that drives the movable mold to move, thereby closing the movable mold and the fixed mold, and the molten material flows into the mold cavity through the injection port, and the molding shape of the material is controlled by the mold cavity and the mold core, and the limiting column limits the closing position of the movable mold and the fixed mold, ensuring the accuracy of the closing position of the movable mold and the fixed mold so that the molten material can be injection molded.

[0019] (2) The flash-free plastic mold described in the present invention has an external air pump that transports gas to the inside of the interlocking groove through an external pipe and a flow channel. The airflow generated by the gas flow cleans the inner wall of the interlocking groove and the outer wall of the interlocking block, so that foreign matter adhering to the inner wall of the interlocking groove and the outer wall of the interlocking block is discharged, the cleanliness of the inner wall of the interlocking groove and the outer wall of the interlocking block is maintained, and the tightness of the fit between the interlocking groove and the interlocking block is ensured, thereby ensuring the detection accuracy of the pressure sensor, improving the detection accuracy of the mold clamping force, reducing the probability of misjudgment, and improving the molding quality of the workpiece. In addition, based on the detection data, it helps the staff to adjust or maintain the relevant data of the equipment in a timely manner, so as to achieve the purpose of molding the workpiece without flash. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the appearance of the fixed mold structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the movable mold structure of the present utility model;

[0023] Figure 3 This is an enlarged schematic diagram of the second connecting column structure of the present invention;

[0024] Figure 4 This is a schematic diagram of a flip of the first connecting column structure of the present invention;

[0025] Figure 5 This is a schematic cross-sectional view of the second connecting column structure of the present invention.

[0026] In the figure: 1. Fixed mold; 11. Mold cavity; 12. Limiting column; 13. First fixed plate; 14. Support column; 15. Pressure sensor; 2. Moving mold; 21. Injection port; 22. Mold core; 23. Second fixed plate; 24. First connecting column; 25. Fitting block; 26. Sealing ring; 3. Second connecting column; 31. Fitting groove; 32. Flow channel; 33. External pipe; 34. Flow rate sensor. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] In order to save manpower and improve efficiency, as an embodiment of the present invention, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 As shown, the flashless plastic mold described in the utility model includes a fixed mold 1, a movable mold 2 and a second connecting column 3. The movable mold 2 is provided on the outer wall of the upper end of the fixed mold 1, and a mold cavity 11 is opened on one side of the outer wall of the upper end of the fixed mold 1. The outer walls on both sides of the movable mold 2 are symmetrically installed with second fixed plates 23, and the lower outer wall of the second fixed plate 23 is installed with a first connecting column 24. The first fixed plates 13 are symmetrically installed on both sides of the fixed mold 1, and a support column 14 is installed on one side of the outer wall of the upper end of the first fixed plate 13. A pressure sensor 15 is installed on the outer wall of the upper end of the support column 14, and the second connecting column 3 is installed on the outer wall of the upper end of the pressure sensor 15. The outer wall of the upper end of the second connecting column 3 is provided with an engaging groove 31, and the lower end of the inner wall of the engaging groove 31 is provided with a flow channel 32. The outer wall of one side of the second connecting column 3 is plugged with an external pipe 33.

[0029] When in use, the external power structure drives the movable mold 2 to move, thereby closing the movable mold 2 and the fixed mold 1, and the molten material flows into the mold cavity 11 through the injection port 21, and the molding shape of the material is controlled by the mold cavity 11 and the mold core 22. The pressure sensor 15 detects the clamping force when the movable mold 2 and the fixed mold 1 are closed.

[0030] In order to ensure the molding quality, for example, Figure 2 As shown, a mold core 22 is installed on one side of the outer wall of the lower end of the movable mold 2, and the mold core 22 is located inside the mold cavity 11. The outer wall of the upper end of the fixed mold 1 is provided with limiting columns 12 distributed in a rectangular array, and the limiting columns 12 are located inside the movable mold 2.

[0031] When in use, the mold cavity 11 and the mold core 22 can control the molding shape of the molten material, and the limiting pillars 12 ensure the accuracy of the mold closing position of the movable mold 2 and the fixed mold 1.

[0032] For conveying molten materials, for example, Figure 1 As shown, an injection port 21 is provided on one side of the outer wall of the upper end of the movable mold 2 , and the injection port 21 is communicated with the interior of the mold cavity 11 .

[0033] When in use, the molten material enters the mold cavity 11 through the injection port 21 and fills the mold cavity 11 with the molten material, thereby performing feeding.

[0034] In order to push the second connecting column 3, illustratively, as Figure 3As shown, a fitting block 25 is installed on the outer wall of the lower end of the first connecting column 24 . The outer wall of the fitting block 25 and the inner wall of the fitting groove 31 are both designed in a conical shape. The fitting block 25 is located inside the fitting groove 31 .

[0035] When in use, the engaging block 25 enters the engaging groove 31, connecting the first connecting column 24 and the second connecting column 3, so that the movable mold 2 drives the first connecting column 24 to squeeze the second connecting column 3, and the clamping force between the movable mold 2 and the fixed mold 1 can be measured through the detection data of the pressure sensor 15.

[0036] In order to cover the fitting groove 31, for example, Figure 4 As shown, a sealing ring 26 is fixed to the outer wall of the lower end of the first connecting column 24 , and the sealing ring 26 is in contact with the upper end surface of the second connecting column 3 .

[0037] During use, after the engaging block 25 is completely inserted into the engaging groove 31 , the sealing ring 26 is pressed against the upper end surface of the second connecting column 3 , thereby maintaining the sealing of the engaging groove 31 and preventing the air flow from continuously flowing out.

[0038] For controlled airflow, for example, Figure 5 As shown, the external pipe 33 is connected to the flow channel 32 , and a flow rate sensor 34 is provided on the outer wall of one side of the external pipe 33 . The flow rate sensor 34 is located outside the second connecting column 3 .

[0039] When in use, the flow rate sensor 34 detects the air flow rate inside the external tube 33 and controls the external air pump to stop according to the detection data.

[0040] When the utility model is in use, the external power structure drives the movable mold 2 to move, thereby closing the movable mold 2 and the fixed mold 1, and the molten material flows into the mold cavity 11 through the injection port 21. The molding shape of the material is controlled by the mold cavity 11 and the mold core 22, and the limiting column 12 limits the closing position of the movable mold 2 and the fixed mold 1.

[0041] When the movable mold 2 moves toward the fixed mold 1, the external air pump delivers gas to the interior of the fitting groove 31 through the external pipe 33 and the flow channel 32. The airflow generated by the gas flow cleans the inner wall of the fitting groove 31 and the outer wall of the fitting block 25, thereby discharging foreign matter adhering to the inner wall of the fitting groove 31 and the outer wall of the fitting block 25.

[0042] The sealing ring 26 blocks the space between the first connecting column 24 and the second connecting column 3. The flow rate sensor 34 detects the air flow rate inside the external pipe 33. When the detection data of the flow rate sensor 34 becomes constant, the external controller can determine that the fitting block 25 has completely entered the fitting groove 31, and then the external controller controls the air pump to stop.

[0043] The movable mold 2 drives the engaging block 25 to squeeze the second connecting column 3 and the pressure sensor 15 so as to detect the clamping force value between the movable mold 2 and the fixed mold 1 .

[0044] It should be noted that the present invention is a flashless plastic mold, and the components in the present invention are all components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0045] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. Flash-free plastic mold, characterized by: The invention comprises a fixed mold (1), a movable mold (2) and a second connecting column (3), wherein the outer wall of the upper end of the fixed mold (1) is provided with a movable mold (2), a mold cavity (11) is provided on one side of the outer wall of the upper end of the fixed mold (1), a second fixed plate (23) is symmetrically installed on the outer walls of both sides of the movable mold (2), a first connecting column (24) is installed on the outer wall of the lower end of the second fixed plate (23), a first fixed plate (13) is symmetrically installed on both sides of the fixed mold (1), a support column (14) is installed on one side of the outer wall of the upper end of the first fixed plate (13), a pressure sensor (15) is installed on the outer wall of the upper end of the support column (14), a second connecting column (3) is installed on the outer wall of the upper end of the pressure sensor (15), an engaging groove (31) is provided on the outer wall of the upper end of the second connecting column (3), a flow channel (32) is provided on the lower end of the inner wall of the engaging groove (31), and an external pipe (33) is plugged and installed on the outer wall of one side of the second connecting column (3).

2. The flashless plastic mold according to claim 1, characterized in that: A mold core (22) is installed on one side of the outer wall of the lower end of the movable mold (2), and the mold core (22) is located inside the mold cavity (11); and a rectangular array of limiting columns (12) are provided on the outer wall of the upper end of the fixed mold (1), and the limiting columns (12) are located inside the movable mold (2).

3. The flashless plastic mold according to claim 1, characterized in that: An injection port (21) is provided on one side of the outer wall of the upper end of the movable mold (2), and the injection port (21) is communicated with the interior of the mold cavity (11).

4. The flashless plastic mold according to claim 1, characterized in that: A fitting block (25) is installed on the outer wall of the lower end of the first connecting column (24). The outer wall of the fitting block (25) and the inner wall of the fitting groove (31) are both designed in a conical shape. The fitting block (25) is located inside the fitting groove (31).

5. The flashless plastic mold according to claim 1, characterized in that: A sealing ring (26) is fixedly attached to the outer wall of the lower end of the first connecting column (24), and the sealing ring (26) is in contact with the upper end surface of the second connecting column (3).

6. The flashless plastic mold according to claim 1, characterized in that: The external pipe (33) is connected to the flow channel (32), and a flow rate sensor (34) is provided on an outer wall of one side of the external pipe (33). The flow rate sensor (34) is located outside the second connecting column (3).

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