A BMC&DMC transfer pressing die and processing method

Abstract

The invention discloses a BMC&DMC transfer pressing mold and a processing method. An independent feeding chamber is designed, which is independent of a product cavity. The two are connected by a flow channel and a gate. The material flows into the feeding chamber by pressing the mold cylinder. During the production process, after the material is put into the feeding chamber, the mold is closed to form a closed cavity. Under the action of the pressing cylinder, the material in the feeding chamber enters the closed cavity through the flow channel. Since the product cavity is closed, flash is not easy to be generated. After molding, the product is not deformed, has no cracks, and has precise dimensions. The subsequent flash processing is mechanized, which saves labor and time and improves production efficiency. The structure is simple and easy to promote.

Description

Technical Field

[0001] The invention belongs to the technical field of molds, and in particular relates to a design and use technology of a mold. Background Art

[0002] BMC & DMC materials contain a lot of glass fiber and fillers, which will produce a lot of waste during molding and block the gaps between workpieces. Therefore, the exhaust grooves, insert grooves, slider grooves, etc. should be easy to clean. When designing places that cannot be cleaned, the parting surface structure and the flash brought out of the cold material groove should be considered.

[0003] BMC & DMC materials are very sensitive to temperature. Large temperature differences can cause product deformation, cracks, and dimensional deviations. Therefore, the mold should be tested at multiple points, and the balance of mold temperature should be fully considered when designing the heating rod.

[0004] In the traditional press-forming production of rotating shafts, due to product structural limitations, the feeding chamber is located on the parting surface, resulting in horizontal flash. During the pressing process, the material is first fed and then the mold is closed, and the material is located on the parting surface. Under the action of the press pressure, the mold is closed, and the material is cushioned on the parting surface of the mold core and cannot enter the cavity completely. Therefore, no matter how accurately the feeding amount is controlled, flash cannot be avoided, and the product size cannot be strictly controlled. After the product is formed, the flash is thick, which is time-consuming and labor-intensive to handle. It cannot be removed mechanically, which is not conducive to improving production efficiency. At the same time, the pressing process is completely applied to the material surface by the pressure of the press table, resulting in a higher product density. Under the same strength requirements of the product, compared with other processes, the material requirements are not high. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention proposes a BMC&DMC transfer pressing die and a processing method. In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions.

[0006] The mold includes: a mold frame, a mold core, a barrel, a runner, an extrusion hammer, a balancing block, a precision positioning block, a slider mechanism, a protective support foot, a front mold core insert insert, a front mold ejection mechanism guide screw, a forced reset mechanism, an extrusion rod, and an ejector plate.

[0007] The mold core is installed inside the mold frame, the barrel is installed inside the mold core, and the space outside the barrel and inside the mold core forms a mold cavity.

[0008] The slider mechanism is installed on the upper part of the mold frame, slides horizontally along the mold frame toward the mold core, and closes the side of the mold cavity.

[0009] The balancing block and the precision positioning block are installed on the upper part of the mold core. The balancing block moves up and down to connect or block the inside and outside of the mold core, and the precision positioning block locks the mold core.

[0010] The flow channel is installed in the barrel, one end of which is connected to the inside of the barrel and the other end of which is connected to the inside of the mold core.

[0011] The extrusion hammer is located inside the barrel, fits the inner wall of the barrel, and slides up and down along the barrel. One end of the extrusion rod is connected to the extrusion hammer, and the other end passes through the bottom of the mold frame.

[0012] The guide screw of the front mold ejection mechanism is vertically installed on the upper part of the mold frame, and the front mold core insert is installed on the guide screw of the front mold ejection mechanism, and slides downward along the guide screw of the front mold ejection mechanism to close the top of the mold cavity.

[0013] The ejector plate is installed at the lower part of the mold frame, one end of the forced reset mechanism is installed at the side of the mold frame, and the other end rotates to press down the ejector plate to close the bottom of the mold cavity.

[0014] The protective support feet are installed on the side of the mold frame to isolate the mold frame from the surrounding space.

[0015] Processing methods include:

[0016] Turn the forced reset mechanism to press down the ejector plate and close the bottom of the mold cavity.

[0017] Slide the slider mechanism horizontally along the mold frame toward the mold core to close the side of the mold cavity.

[0018] Press down the balance block to block the inside and outside of the mold core.

[0019] Inject BMC & DMC materials into the barrel, slide the front mold insert downward along the guide screw of the front mold ejection mechanism to close the top of the mold cavity.

[0020] Heat the mold to 150 degrees to keep the BMC & DMC materials in a molten state.

[0021] Use precision positioning blocks to lock the mold core to prevent deformation.

[0022] Lift the extrusion rod upwards to make the extrusion hammer head slide upward along the barrel to push the molten BMC & DMC material into the flow channel.

[0023] The BMC & DMC material flows from the runner into the mold cavity, stops heating, and is molded into a BMC & DMC product.

[0024] Lift the balance block to connect the inside and outside of the mold core and reduce the air pressure in the mold cavity.

[0025] Slide the slider mechanism horizontally along the mold frame away from the mold core, slide the front mold core insert upward along the guide screw of the front mold ejection mechanism to eject the BMC&DMC product.

[0026] The present invention adopts screw-free injection, and designs an independent feeding chamber, which is independent of the product cavity. The two are connected by a runner and a gate, and the material flows into the feeding chamber by relying on the mold top cylinder to extrude the material. In the production process, after the material is placed in the feeding chamber, the mold is closed to form a closed cavity, and the material in the feeding chamber enters the closed cavity through the runner under the action of the top cylinder. Since the product cavity is closed, flash is not easy to be generated, and the product after molding is not deformed, has no cracks, and has precise dimensions. The subsequent flash processing is mechanized, which saves labor and time and improves production efficiency. The structure is simple and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is the top view of the mold. Figure 2 This is the front view of the mold.

[0028] Figure numerals: 1—mold frame, 2—mold core, 3—barrel, 4—flow channel, 5—extrusion hammer, 6—BMC&DMC product, 7—balance block, 8—precision positioning block, 9—slider mechanism, 10—protective support foot, 11—front mold core insert insert, 12—front mold ejection mechanism guide screw, 13—forced reset mechanism, 14—extrusion rod, 15—ejector plate. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0030] The structure of the mold is as follows Figure 1 and Figure 2 As shown:

[0031] The ejector plate 15 is installed at the lower part of the mold frame 1, and one end of the forced reset mechanism 13 is installed at the side of the mold frame 1. The other end of the forced reset mechanism is rotated to press down the ejector plate 15 to close the lower part of the mold cavity.

[0032] The slider mechanism 9 is installed on the upper part of the mold frame 1, and slides horizontally along the mold frame 1 toward the mold core 2 to close the side of the mold cavity.

[0033] The balancing block 7 is installed on the upper part of the mold core 2. The balancing block 7 moves up and down to connect or block the inside and outside of the mold core 2. Pressing down the balancing block 7 blocks the inside and outside of the mold core 2.

[0034] The mold core 2 is installed inside the mold frame 1, and the barrel 3 is installed inside the mold core 2, so that the space outside the barrel 3 and inside the mold core 2 forms a mold cavity.

[0035] The guide screw 12 of the front mold ejection mechanism is vertically installed on the upper part of the mold frame 1, and the front mold core insert insert 11 is installed on the guide screw 12 of the front mold ejection mechanism.

[0036] Inject BMC & DMC materials into the barrel, and the front mold insert slides downward along the guide screw of the front mold ejection mechanism to close the top of the mold cavity.

[0037] Heat the mold to 150 degrees to keep the BMC & DMC materials in a molten state.

[0038] The precision positioning block 8 is installed on the upper part of the mold core 2 to lock the mold core 2 and prevent the mold core 2 from deforming due to thermal expansion and contraction.

[0039] The flow channel 4 is installed on the barrel 3 , one end of which is connected to the inside of the barrel 3 , and the other end of which is connected to the inside of the mold core 2 .

[0040] The extrusion hammer 5 is located inside the barrel 3 , fits against the inner wall of the barrel 3 , and slides up and down along the barrel 3 . One end of the extrusion rod 14 is connected to the extrusion hammer 5 , and the other end passes through the bottom of the mold frame 1 .

[0041] The extrusion rod 14 is pushed upward, so that the extrusion hammer head 5 slides upward along the barrel 3, pushing the molten BMC&DMC material to flow into the mold cavity from the flow channel 4, and the heating is stopped to form a BMC&DMC product 6.

[0042] Lift the balance block 7 to connect the inside and outside of the mold core 2 and reduce the air pressure in the mold cavity.

[0043] The slider mechanism 9 slides horizontally along the mold frame 1 away from the mold core 2, and the front mold core insert insert 11 slides upward along the front mold ejection mechanism guide screw 12 to take out the BMC&DMC product 6.

[0044] The protective support legs 10 are installed on the side of the mold frame 1 to isolate the mold frame 1 from the surrounding space and prevent the mold frame from colliding with other objects.

[0045] The above are embodiments of the present invention and do not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A BMC&DMC transfer pressing die, characterized in that: include: Mold frame, mold core, barrel, runner, balance block, precision positioning block, slider mechanism, protective support foot; The mold core is installed inside the mold frame, the barrel is installed inside the mold core, and the space outside the barrel and inside the mold core forms a mold cavity; the runner is installed on the barrel, one end of which is connected to the inside of the barrel, and the other end is connected to the inside of the mold core; the slider mechanism is installed on the upper part of the mold frame, slides horizontally along the mold frame toward the mold core, and closes the side of the mold cavity; the balancing block and the precision positioning block are installed on the upper part of the mold core, the balancing block moves up and down, connecting or blocking the inside and outside of the mold core, and the precision positioning block locks the mold core; the protective support feet are installed on the side of the mold frame to isolate the mold frame from the surrounding space.

2. The BMC&DMC transfer pressing die according to claim 1, characterized in that: Also includes: The extrusion hammer is located inside the barrel, fits against the inner wall of the barrel, and slides up and down along the barrel; the extrusion rod has one end connected to the extrusion hammer and the other end passing through the bottom of the mold frame.

3. The BMC&DMC transfer pressing die according to claim 1, characterized in that: Also includes: The guide screws of the front mold ejection mechanism are vertically installed on the upper part of the mold frame; the front mold core insert is installed on the guide screws of the front mold ejection mechanism, slides downward along the guide screws of the front mold ejection mechanism, and closes the top of the mold cavity.

4. The BMC&DMC transfer pressing die according to claim 1, characterized in that: Also includes: The ejector plate is installed at the bottom of the mold frame; the forced reset mechanism has one end installed on the side of the mold frame and the other end rotates to press down the ejector plate and close the bottom of the mold cavity.

5. A method for processing a BMC&DMC transfer pressing die, according to the BMC&DMC transfer pressing die according to any one of claims 1 to 4, characterized in that: include: Close the bottom of the mold cavity, slide the slider mechanism horizontally along the mold frame toward the mold core, close the side of the mold cavity, press down the balance block, block the inside and outside of the mold core, inject BMC&DMC material into the barrel, and close the top of the mold cavity; heat the mold to 150 degrees to make the BMC&DMC material in a molten state, use the precision positioning block to lock the mold core to prevent the mold core from deforming; make the BMC&DMC material flow into the mold cavity from the runner, stop heating, and mold it into BMC&DMC, stop heating, and mold it into a BMC&DMC product, lift the balance block, connect the inside and outside of the mold core, reduce the air pressure in the mold cavity, and take out the BMC&DMC product.

6. The method for processing a BMC&DMC transfer pressing die according to claim 5, characterized in that: The lower part of the closed mold cavity includes: an ejector plate installed at the lower part of the mold frame, a forced reset mechanism installed at the side of the mold frame, and the forced reset mechanism is rotated to press down the ejector plate.

7. The method for processing a BMC&DMC transfer pressing die according to claim 5, characterized in that: Above the closed mold cavity, it includes: using a front mold ejection mechanism guide screw vertically installed on the upper part of the mold frame, and the front mold core insert is installed on the front mold ejection mechanism guide screw, and slides downward along the front mold ejection mechanism guide screw; taking out the BMC&DMC product includes: sliding the slider mechanism horizontally away from the mold core along the mold frame, sliding the front mold core insert upward along the front mold ejection mechanism guide screw, and ejecting the BMC&DMC product.

8. The method for processing a BMC&DMC transfer pressing die according to claim 5, characterized in that: The method of making the BMC & DMC material flow from the runner into the mold cavity includes: using an extrusion hammer head to fit the inner wall of the barrel, connecting an extrusion rod to the extrusion hammer head, pushing the extrusion rod upward, making the extrusion hammer head slide upward along the barrel, and pushing the molten BMC & DMC material into the runner.

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