Temperature control type injection mold

Abstract

The utility model provides a temperature control type injection mold, and belongs to the technical field of injection molds. The temperature control type injection mold comprises a rotating disc and a pipe shaft, a mounting cavity is formed in the lower end face of a lower mold plate, a round hole allowing the pipe shaft to be transversely inserted and freely rotate is formed in the side face of the lower mold plate and communicated with the mounting cavity, the outer end of the pipe shaft is connected with a handle driving the pipe shaft to rotate, and the inner end of the pipe shaft is fixedly welded to the rotating disc which is vertically arranged. The upper end face of the rotating disc is attached to the inner wall of the installation cavity, the lower end of the rotating disc is suspended, a cooling assembly and a heating assembly are arranged in the rotating disc, the middle of the rotating disc is provided with a strip-shaped groove which is in a strip shape and separates the heating assembly from the cooling assembly, heat insulation cotton is fixed in the strip-shaped groove, and a locking block for positioning a handle is fixed to the outer wall of the lower die plate. The cooling assembly and the heating assembly are arranged in the rotating disc at the same time, the heating mode and the cooling mode can be switched by rotating the handle, the occupied in-mold space is small, and the two modes can be flexibly switched.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds and relates to a temperature-controlled injection mold. Background Art

[0002] During the plastic parts injection molding process, the mold temperature needs to be controlled, especially for some automotive interior parts. When the molten plastic raw material is injected into the mold cavity, the temperature of the raw materials injected before and after is kept consistent, and the mold needs to be maintained at a certain temperature. The mold temperature has a great influence on the molding shrinkage rate, and it also greatly affects the mechanical properties of the injection molded product, and can also cause poor molding defects on the product surface. Too low mold temperature can also reduce the fluidity of the molten plastic, affect the plastic crystallinity, and result in low product finish. Therefore, for some high-demand automotive injection molded parts, it is necessary to install a temperature control mechanism in the injection mold. Due to the limited space in the mold, the temperature control mechanism and the circulating water cooling mechanism are installed in the mold core at the same time. If the two are too close, they are likely to affect each other. Utility Model Content

[0003] The purpose of the utility model is to address the above problems in the existing technology and propose a temperature-controlled injection mold. The heating component and the cooling component are integrated in a rotating disk, which takes up little space and is convenient for switching between heating and cooling modes.

[0004] The object of the utility model can be achieved through the following technical solutions: a temperature-controlled injection mold, comprising an upper template, a lower template, a sealing plate, a vertical plate and a bottom plate, and the lower template, the sealing plate, the vertical plate and the bottom plate are fixed together by bolts, characterized in that the upper template and the lower template form a mold cavity after the mold is closed, and an installation cavity is opened on the lower end surface of the lower template. The temperature-controlled injection mold also includes a rotating disk and a tube shaft, and a circular hole is opened on the side of the lower template for the tube shaft to be inserted horizontally and rotated freely. The circular hole is connected to the installation cavity, and the outer end of the tube shaft is connected to a handle that drives the tube shaft to rotate. The inner end of the tube shaft is welded and fixed to the rotating disk, and the rotating disk is vertically arranged. The upper end surface of the rotating disk is in contact with the inner wall of the installation cavity, and the lower end of the rotating disk is suspended. A cooling component and a heating component are provided in the rotating disk. The middle part of the rotating disk has a long strip groove that separates the heating component and the cooling component. Insulation cotton is fixed in the strip groove, and a locking block of the positioning handle is fixed on the outer wall of the lower template.

[0005] Furthermore, the cooling assembly includes a cooling channel opened on the end surface of the rotating disk, a water inlet pipe and a water outlet pipe arranged in the tube shaft, the outer ends of the water inlet pipe and the water outlet pipe are connected to the external water tank, the inlet of the cooling channel is connected to the water inlet pipe in the tube shaft, and the outlet of the cooling channel is connected to the water outlet pipe in the tube shaft.

[0006] Furthermore, the heating assembly includes a plurality of heat-conducting grooves opened on the end surface of the rotating disk, a circuit board and a plurality of electric heating tubes. The electric heating tubes are fixed in the heat-conducting grooves. The positive and negative poles of the electric heating tubes are connected to the circuit board. The circuit board is connected to the external power supply through a wire. A protective tube for the wire to pass through is provided in the tube shaft.

[0007] Furthermore, the rotating disk is covered with a shell, a connecting hole is opened on the rotating disk, and a connecting column is inserted into the connecting hole and embedded on the shell.

[0008] Furthermore, the locking block is a magnet block. There are two magnet blocks on the outer wall of one side of the lower template, one high and one low. When the handle is turned upward, it is attracted to the high-positioned magnet block, and when the handle is turned downward, it is attracted to the low-positioned magnet block, thereby preventing the handle from being accidentally turned during operation.

[0009] Furthermore, a groove is provided at the bottom of the mold cavity of the lower template, and a top plate is provided in the groove. A push rod is fixed to the lower end surface of the top plate, which passes through the lower template and the closing plate. The lower end of the push rod is connected to a support plate. A spring is sleeved on the push rod, and the upper end of the spring abuts against the closing plate, and the lower end of the spring abuts against the support plate. A unloading hole is provided on the bottom plate for the telescopic rod of the unloading cylinder to pass through, and the unloading hole is located directly below the support plate.

[0010] Furthermore, an injection molding needle is provided on the upper template, and the injection molding needle is communicated with the mold cavity of the upper template.

[0011] The injection molding machine drives the upper and lower mold plates together. The handle is turned so that the heating element is at the top of the rotating disk. The locking block locks the handle, and the electric heating tube is energized. The cooling element is not in operation at this time. Molten plastic material is continuously injected into the mold cavity. Due to the action of the heating element, the rotating disk heats up locally, transferring heat to the upper mold plate in close contact, so that the injected plastic remains fluid. Heating is stopped once the mold cavity is filled. The handle is turned so that the cooling element is at the top of the rotating disk. The locking block locks the handle, and the heating element is moved to the bottom of the rotating disk, suspended in the air. The circulating water pump in the water tank is started, and cooling water continuously flows from the water inlet pipe into the cooling channel. The heat from the upper mold plate is removed by the cooling water, and then flows back to the external cooling water tank through the water outlet pipe. After the product has cooled and set, the mold is opened, and the unloading cylinder is activated, pushing the support plate and ejector rod upward, so that the ejector plate can eject the product from the mold cavity, allowing the worker to easily remove the product.

[0012] Compared with the existing technology, this temperature-controlled injection mold has the following advantages:

[0013] 1. The rotating disk is equipped with both cooling and heating components. The heating and cooling modes can be switched by turning the handle. It occupies little space in the mold and can flexibly switch between the two modes.

[0014] 2. Insulation is provided in the middle by using thermal insulation cotton to prevent the cooling component and the heating component from interfering with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of this temperature-controlled injection mold.

[0016] Figure 2 It is a three-dimensional rotating disk Figure 1 .

[0017] Figure 3 It is a three-dimensional rotating disk Figure 2 .

[0018] Figure 4 It is a cross-sectional view of the rotating disk.

[0019] In the figure, 1. upper template; 2. lower template; 3. sealing plate; 4. vertical plate; 5. bottom plate; 6. mounting cavity; 7. rotating disk; 8. pipe shaft; 9. strip groove; 10. thermal insulation cotton; 11. locking block; 12. cooling channel; 13. water inlet pipe; 14. water outlet pipe; 15. heat conduction groove; 16. circuit board; 17. electric heating tube; 18. protective tube; 19. outer shell; 20. connecting hole; 21. connecting column; 22. handle; 23. top plate; 24. ejector rod; 25. support plate; 26. spring; 27. injection molding needle tube. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] like Figure 1 As shown, the temperature-controlled injection mold includes an upper template 1, a lower template 2, a sealing plate 3, a vertical plate 4 and a bottom plate 5. The lower template 2, the sealing plate 3, the vertical plate 4 and the bottom plate 5 are fixed together by bolts. It is characterized in that the upper template 1 and the lower template 2 form a mold cavity after the mold is closed, and a mounting cavity 6 is opened on the lower end surface of the lower template 2. The temperature-controlled injection mold also includes a rotating disk 7 and a tube shaft 8. A circular hole for the tube shaft 8 to be inserted horizontally and rotated freely is opened on the side of the lower template 2. The circular hole is connected to the mounting cavity 6, and the tube shaft 8 The outer end is connected to a handle 22 that drives the tube shaft 8 to rotate. The inner end of the tube shaft 8 is welded and fixed to the rotating disk 7. The rotating disk 7 is vertically arranged. The upper end surface of the rotating disk 7 is in contact with the inner wall of the mounting cavity 6. The lower end of the rotating disk 7 is suspended in the air. A cooling component and a heating component are provided in the rotating disk 7. The middle part of the rotating disk 7 has a long strip groove 9 that separates the heating component and the cooling component. Insulating cotton 10 is fixed in the strip groove 9. The outer wall of the lower template 2 is fixed with a locking block 11 for positioning the handle 22.

[0022] like Figure 2As shown, the cooling assembly includes a cooling channel 12 opened on the end face of the rotating disk 7, a water inlet pipe 13 and a water outlet pipe 14 arranged in the pipe shaft 8, the outer ends of the water inlet pipe 13 and the water outlet pipe 14 are connected to the external water tank, the inlet of the cooling channel 12 is connected to the water inlet pipe 13 in the pipe shaft 8, and the outlet of the cooling channel 12 is connected to the water outlet pipe 14 in the pipe shaft 8.

[0023] The heating assembly includes a plurality of heat-conducting grooves 15 opened on the end surface of the rotating disk 7, a circuit board 16 and a plurality of electric heating tubes 17. The electric heating tubes 17 are fixed in the heat-conducting grooves 15. The positive and negative poles of the electric heating tubes 17 are connected to the circuit board 16. The circuit board 16 is connected to the external power supply through a wire. A protective tube 18 for the wire to pass through is provided in the tube shaft 8.

[0024] like Figure 3-4 As shown, the rotating disk 7 is covered with a shell 19 , a connecting hole 20 is opened on the rotating disk 7 , and a connecting column 21 is inserted into the connecting hole 20 and engaged on the shell 19 .

[0025] The locking block 11 is a magnet block. There are two magnet blocks on the outer wall of one side of the lower template 2, one high and one low. When the handle 22 is rotated upward, it is adsorbed by the high-position magnet block. When the handle 22 is rotated downward, it is adsorbed by the low-position magnet block to prevent the handle 22 from rotating accidentally during operation.

[0026] The bottom of the mold cavity of the lower template 2 is provided with a groove, within which a top plate 23 is located. A push rod 24 is fixed to the lower end of the top plate 23, penetrating the lower template 2 and the closing plate 3. The lower end of the push rod 24 is connected to a support plate 25. A spring 26 is sleeved on the push rod 24, with the upper end of the spring 26 abutting against the closing plate 3 and the lower end of the spring 26 abutting against the support plate 25. A discharge hole is provided on the bottom plate 5, through which the telescopic rod of the discharge cylinder passes. The discharge hole is located directly below the support plate 25. When the telescopic rod of the discharge cylinder retracts, the compressed spring 26 expands, pushing the support plate 25 downward, allowing the top plate 23 to re-embed into the groove.

[0027] An injection needle 27 is provided on the upper template 1 . The injection needle 27 is communicated with the mold cavity of the upper template 1 . Plastic raw material is injected into the mold cavity through the injection needle 27 .

[0028] Workflow: The injection molding machine drives the upper mold plate 1 and the lower mold plate 2 to close the mold, and rotates the handle 22 to the direction so that the heating component is located at the upper end of the rotating disk 7. The locking block 11 locks the handle 22, and the electric heating tube 17 is energized. The cooling component does not work at this time. The molten plastic raw material is continuously injected into the mold cavity. Due to the action of the heating component, the rotating disk 7 is locally heated, and the heat is transferred to the upper mold plate 1 that is tightly attached, so that the injected plastic maintains fluidity. After filling the mold cavity, heating is stopped. Turn the handle 22 to position the cooling component at the upper end of the rotating disk 7. The locking block 11 locks the handle 22, and the heating component is transferred to the lower end of the rotating disk 7 and suspended in the air. The circulating water pump in the water tank is started, and cooling water continuously enters the cooling channel 12 from the water inlet pipe 13. The heat of the upper mold plate 1 is taken away by the cooling water and flows back to the external cooling water tank after passing through the water outlet pipe 14. After the product has finished cooling and shaping, the mold is opened, the unloading cylinder is started, and the support plate 25 and the ejector rod 24 are pushed upward, so that the ejector plate 23 ejects the product out of the mold cavity, and the worker can easily take out the product.

[0029] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A temperature-controlled injection mold, comprising an upper mold plate, a lower mold plate, a sealing plate, a vertical plate, and a bottom plate, wherein the lower mold plate, the sealing plate, the vertical plate, and the bottom plate are fixed together by bolts, characterized in that: After the upper template and the lower template are combined to form a mold cavity, an installation cavity is opened on the lower end surface of the lower template, the temperature-controlled injection mold also includes a rotating disk and a tube shaft, a circular hole is opened on the side of the lower template for the tube shaft to be inserted horizontally and rotated freely, the circular hole is connected to the installation cavity, the outer end of the tube shaft is connected to a handle for driving the tube shaft to rotate, the inner end of the tube shaft is welded and fixed to the rotating disk, the rotating disk is vertically arranged, the upper end surface of the rotating disk is in contact with the inner wall of the installation cavity, the lower end of the rotating disk is suspended, a cooling component and a heating component are provided in the rotating disk, the middle part of the rotating disk has a long strip groove that separates the heating component and the cooling component, the strip groove is fixed with heat insulation cotton, and the outer wall of the lower template is fixed with a locking block of the positioning handle.

2. A temperature-controlled injection mold according to claim 1, characterized in that: The cooling assembly includes a cooling channel opened on the end surface of the rotating disk, a water inlet pipe and a water outlet pipe arranged in the tube shaft, the outer ends of the water inlet pipe and the water outlet pipe are connected to the external water tank, the inlet of the cooling channel is connected to the water inlet pipe in the tube shaft, and the outlet of the cooling channel is connected to the water outlet pipe in the tube shaft.

3. The temperature-controlled injection mold according to claim 1, characterized in that: The heating assembly includes a plurality of heat-conducting grooves opened on the end surface of the rotating disk, a circuit board and a plurality of electric heating tubes. The electric heating tubes are fixed in the heat-conducting grooves. The positive and negative poles of the electric heating tubes are connected to the circuit board. The circuit board is connected to the external power supply through a wire. A protective tube for the wire to pass through is provided in the tube shaft.

4. A temperature-controlled injection mold according to claim 1, 2 or 3, characterized in that: The rotating disk is covered with a shell, a connecting hole is provided on the rotating disk, and a connecting column is inserted into the connecting hole and embedded in the shell.

5. The temperature-controlled injection mold according to claim 4, characterized in that: The locking block is a magnet block. There are two magnet blocks on the outer wall of one side of the lower template, one high and one low. When the handle is turned upward, it is adsorbed by the high magnet block, and when the handle is turned downward, it is adsorbed by the low magnet block.

6. The temperature-controlled injection mold according to claim 5, characterized in that: The bottom of the mold cavity of the lower template is provided with an embedding groove, and a top plate is provided in the embedding groove. A push rod passing through the lower template and the closing plate is fixed to the lower end surface of the top plate. The lower end of the push rod is connected to the support plate. A spring is sleeved on the push rod. The upper end of the spring abuts against the closing plate, and the lower end of the spring abuts against the support plate. A unloading hole is provided on the bottom plate for the telescopic rod of the unloading cylinder to pass through, and the unloading hole is located directly below the support plate.

7. The temperature-controlled injection mold according to claim 6, characterized in that: An injection molding needle tube is passed through the upper template and is communicated with the mold cavity of the upper template.

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