A mold for a microfine porous plastic part

Abstract

The application discloses a kind of densely distributed micro-pore plastic parts mould, including top plate, upper die A, upper die B, lower die, cushion block and bottom plate, the top plate is connected by bolt fixed connection upper die A below, the lower side of upper die A is connected by bolt fixed connection upper die B below;The lower side of upper die B is detachably connected lower die by guide column, the bottom of lower die and the position close to its opposite sides are respectively connected by bolt fixed connection two cushion blocks;The needle core of the present application is distributed to upper die and lower die, because needle core is dense, quantity is too much, and the problem that needle core is densely distributed and cannot be fixed needle core hanging platform is solved by being placed in multiple layers of staggered combination, by first pulling needle core, the problem that the tight force of plastic part package is solved, the problem that needle core and plastic part package tight force are big when the depth of hole is big, avoid the phenomenon that plastic part occurs when it is molded, plastic part and nozzle are quickly separated and fall off under the action of pressing plate, realize mold opening, plastic part and nozzle are quickly separated, realize completely automatic production.

Description

Technical Field

[0001] This invention relates to a mold, specifically a mold for a plastic part with densely packed micro-pores (144 fine holes with a diameter of 0.90 mm and a hole depth of 7.5 mm evenly distributed within a unit area of ​​48 x 5.5 mm). Background Technology

[0002] Plastic parts with dense micro-pores are plastic workpieces with several through holes (as shown in Figure 1). Currently, the molds used for producing such products still adopt the traditional ejector pin design. The ejector pin mechanism has defects such as sticking to the mold and deformation of the plastic part during ejection, which is unreliable. Summary of the Invention

[0003] The purpose of this invention is to provide a mold for a plastic part with densely packed micropores, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A mold for a plastic part with densely packed micro-pores includes an upper mold pin core fixing component and a lower mold pin core fixing component. The upper and lower mold pin core fixing components are multi-layered stacked. The pin cores fixed on each layer of the upper and lower mold pin core fixing components are staggered according to the positions of the through holes on the micro-porous plastic part. Both the lower layer upper mold pin core fixing component and the upper layer lower mold pin core fixing component have through holes for the pin cores to pass through. The upper mold pin core fixing component is disposed in a corresponding mounting groove on the upper mold A, and the pin core of the upper mold pin core fixing component extends into the mold cavity. A mounting groove is also formed on the lower mold core and fixedly connected to the lower mold pin core fixing component, and the pin core of the lower mold pin core fixing component also extends into the mold cavity.

[0006] As a further aspect of the present invention: the needle cores on the lower mold needle core fixing member correspond one-to-one with the needle cores on the upper mold needle core fixing member and are coaxially arranged. After the mold is closed, the needle cores on the lower mold needle core fixing member contact the ends of the needle cores on the upper mold needle core fixing member.

[0007] As a further aspect of the present invention: the upper surface of the purlin is set as a plane, and the lower surface of the die insert is opened into a cavity and combined with the upper surface of the purlin to form a closed mold cavity.

[0008] As a further aspect of the present invention: an upper clamping plate and a lower clamping plate are provided between the two pads and connected by bolts. The upper clamping plate and the lower clamping plate clamp the ring formed at the lower end of the ejector rod. The upper end of the ejector rod passes through the upper clamping plate and the lower mold core in sequence and is fixedly connected to the reinforcing plate by bolts. A through hole is provided on the base plate for the output end of the ejection mechanism to extend. The ejection mechanism is fixedly installed on the frame. The output end of the ejection mechanism is fixedly connected to the lower surface of the lower clamping plate. When demolding is required, the ejection mechanism can push the reinforcing plate to separate the densely perforated plastic part located on it from the core on the lower mold core fixing part.

[0009] As a further embodiment of the present invention: a fixed guide rod is fixedly connected between the lower mold and the base plate, and holes for the fixed guide rod to pass through are opened on the upper clamping plate and the lower clamping plate, and a sliding sleeve is fixedly connected in the holes. The sliding sleeve is slidably connected to the fixed guide rod, and a spring is sleeved on part of the fixed guide rod between the upper clamping plate and the lower mold, that is, the spring is used to assist in the reset after the ejection mechanism is reset.

[0010] As a further aspect of the present invention: a circular ring formed at the lower end of the movable guide rod is clamped between the upper clamping plate and the lower clamping plate. The movable guide rod passes through the lower mold and contacts the lower surface of the upper mold B. That is, the movable guide rod is located on one side of the groove opened on the lower surface of the upper mold B. A spring is sleeved on part of the movable guide rod between the upper clamping plate and the lower mold. When the upper clamping plate and the lower clamping plate are driven to move up through the ejection mechanism, the upper mold assembly can be lifted at the same time.

[0011] As a further aspect of the present invention: a positioning rod is clamped between the upper mold core and the upper mold B, and a positioning hole is provided on the lower mold core for the positioning rod to be inserted.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention distributes the ejector pins in the upper and lower molds. Due to the dense distribution and large number of ejector pins, the multi-layer staggered stacking combination solves the problem of the ejector pin holder being unable to be fixed due to the dense distribution of ejector pins. By first pulling out the ejector pins and then releasing the clamping force of the plastic part, the problem of large clamping force between the ejector pins and the plastic part when the hole depth is large is solved, and the phenomenon of the plastic part sticking to the front mold when the plastic part is demolded is avoided. The plastic part and the gate that remain in the rear mold are quickly separated and detached under the action of the baffle plate, solving the problem of difficult demolding. The present invention increases the ejection area during demolding by setting the baffle plate structure, resulting in a better appearance of the plastic part and no defects such as ejector pin marks. Attached Figure Description

[0013] Figure 1a A front view of a plastic part produced from a mold with numerous micropores.

[0014] Figure 1b A side view of a plastic part produced from a mold with numerous micropores.

[0015] Figure 1c A top view of a plastic part produced from a mold with numerous micropores.

[0016] Figure 1d A three-dimensional structural diagram of a plastic part produced from a mold with numerous micropores.

[0017] Figure 2 This is a three-dimensional schematic diagram of a plastic mold with numerous micropores.

[0018] Figure 3 This is a schematic diagram of removing the upper mold assembly from a plastic part mold with numerous micropores.

[0019] Figure 4 This is a schematic diagram of a cross-section of a plastic mold with numerous micropores.

[0020] Figure 5 This is a schematic diagram of a longitudinal section of a plastic mold with numerous micropores.

[0021] Figure 6 This is a schematic diagram showing the staggered distribution of needle cores on the upper mold needle core fixing component in a mold with densely packed micropores. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 2-6 In this embodiment of the invention, a mold for a plastic part with densely packed micropores includes a top plate 1, an upper mold A2, an upper mold B3, a lower mold 4, pads 5, and a bottom plate 6. The top plate 1 is fixedly connected to the upper mold A2 by bolts, and the upper mold B3 is fixedly connected to the lower part of the upper mold A2 by bolts. That is, the top plate 1, the upper mold B3, and the upper mold A2 constitute the upper mold assembly. The lower mold B3 is detachably connected to the lower mold 4 by guide pillars. Two pads 5 are fixedly connected to the bottom of the lower mold 4 and near its opposite sides by bolts. The pads 5 are fixedly connected to the bottom plate 6.

[0024] The upper surface of the lower mold 4 has a groove and a lower mold core 18 is installed thereon. The upper surface of the lower mold core 18 has a groove and a retainer plate 19 is slidably installed thereon. The lower surface of the upper mold B3 has a groove and an upper mold core 20 is fixedly connected thereon. The upper mold core 20 has through slots according to the number of mold cavities and a cavity insert 8 is fixedly connected thereon. According to the shape of the plastic part with dense micro-pores, the upper surface of the retainer plate 19 can be set as a plane. The lower surface of the cavity insert 8 opens a cavity inward and combines with the upper surface of the retainer plate 19 to form a closed mold cavity.

[0025] The upper mold core fixing component 7 is set according to the actual number of mold cavities of a mold. The fixing positions of the multiple layers of cores 21 on the lower mold core fixing component 10 and the fixing positions of the multiple layers of cores 21 on the upper mold core fixing component 7 are both staggered. Both the upper mold core fixing component 7 and the lower mold core fixing component 10 are multi-layered stacked. The cores 21 fixed on each layer of the upper mold core fixing component 7 and the lower mold core fixing component 10 are staggered according to the position of the through holes on the densely packed micro-pore plastic part. The lower layer of the upper mold core fixing component 7 and the upper layer of the lower mold core fixing component 10 are provided with through holes for the cores 21 to pass through. Specifically, the pin cores 21 can be divided into multiple rows according to the distribution of holes in the densely packed micro-pore plastic part, with each row corresponding to an upper mold pin core fixing member 7 or a lower mold pin core fixing member 10; the upper mold pin core fixing member 7 is set in a corresponding mounting groove on the upper mold A2, and the upper mold pin core fixing member 7 is a metal block that fixes several vertically downward pin cores 21 used for hole forming. The pin cores 21 of the upper mold pin core fixing member 7 pass through the upper mold B3 and the cavity insert 8 and are set in the mold cavity; the lower mold core 18 also has a mounting groove and is fixed. A fixed lower mold needle core fixing member 10 is connected, and several upward-facing needle cores 21 are fixedly connected to the lower mold needle core fixing member 10. The needle cores 21 of the lower mold needle core fixing member 10 pass through the reinforcing plate 19 and extend into the mold cavity. The needle cores 21 on the lower mold needle core fixing member 10 and the needle cores 21 on the upper mold needle core fixing member 7 can correspond one-to-one and be coaxially arranged. Depending on the type of densely packed micro-holes, after the mold is closed, the ends of the needle cores 21 on the lower mold needle core fixing member 10 and the needle cores 21 on the upper mold needle core fixing member 7 may or may not be in contact.

[0026] A positioning rod 9 is clamped between the upper mold core 20 and the upper mold B3, and a positioning hole is provided on the lower mold core 18 for the positioning rod 9 to be inserted.

[0027] An upper clamping plate 12 and a lower clamping plate 13 are provided between the two pads 5 and are connected by bolts. The upper clamping plate 12 and the lower clamping plate 13 clamp the ring formed at the lower end of the ejector rod 11. The upper end of the ejector rod 11 passes through the upper clamping plate 12 and the lower mold core 18 of the lower mold 4 in sequence and is fixedly connected to the retaining plate 19 by bolts. A through hole is opened on the base plate 6 for the output end of the ejection mechanism to extend. The ejection mechanism is fixedly installed on the frame. The output end of the ejection mechanism is fixedly connected to the lower surface of the lower clamping plate 13. When demolding is required, the retaining plate 19 can be pushed up by the operation of the ejection mechanism, thereby separating the densely perforated plastic part located on it from the needle core 21 on the lower mold needle core fixing part 10.

[0028] The ejection mechanism can be a hydraulic push rod and can employ existing control methods.

[0029] A fixed guide rod 23 is fixedly connected between the lower mold 4 and the base plate 6. Holes for the fixed guide rod 23 to pass through are opened on the upper clamping plate 12 and the lower clamping plate 13, and a sliding sleeve 22 is fixedly connected in the holes. The sliding sleeve 22 is slidably connected to the fixed guide rod 23. A spring 17 is sleeved on part of the fixed guide rod 23 between the upper clamping plate 12 and the lower mold 4. That is, after the ejection mechanism is reset, the spring is used to assist in the reset.

[0030] The upper clamping plate 12 and the lower clamping plate 13 clamp the ring formed at the lower end of the movable guide rod 16. The movable guide rod 16 passes through the lower mold 4 and contacts the lower surface of the upper mold B3. That is, the movable guide rod 16 is located on one side of the groove opened on the lower surface of the upper mold B3. A spring 17 is sleeved on part of the movable guide rod 16 between the upper clamping plate 12 and the lower mold 4. When the upper clamping plate 12 and the lower clamping plate 13 are moved upward by the ejection mechanism, the upper mold assembly can be lifted at the same time. That is, the needle core 21 of the upper mold needle core fixing part 7 can be loosened in advance with the diameter of the plastic part with dense micro-pores to facilitate demolding.

[0031] The base plate 6 is also fixed with multiple pull rods 24 that pass through the lower mold 4 and the reinforcing plate 19. The part of the pull rod 24 that protrudes from the upper surface of the reinforcing plate 19 is integrally formed into an inverted frustum shape, so that after the molding solidifies, the sprue and the plastic part can remain in the rear mold.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mold for a plastic part with dense micro-pores, comprising a top plate (1), an upper mold A (2), an upper mold B (3), a lower mold (4), pads (5) and a bottom plate (6), wherein the top plate (1) is fixedly connected to the upper mold A (2) by bolts, and the upper mold B (3) is fixedly connected to the lower part of the upper mold A (2) by bolts, that is, the top plate (1), the upper mold B (3) and the upper mold A (2) constitute the upper mold assembly; the lower mold B (3) is detachably connected to the lower mold (4) by guide pillars, and two pads (5) are fixedly connected to the bottom of the lower mold (4) and near its opposite sides by bolts, and the pads (5) are fixedly connected to the bottom plate (6); The upper surface of the lower mold (4) has a groove and a lower mold core (18) is installed thereon. The upper surface of the lower mold core (18) has a groove and a sliding plate (19) is installed thereon. The lower surface of the upper mold B (3) has a groove and an upper mold core (20) is fixedly connected thereon. The upper mold core (20) has a through groove according to the number of mold cavities and a cavity insert (8) is fixedly connected thereon. According to the shape of the plastic part with dense micro-pores, the upper surface of the plate (19) is set as a plane. The lower surface of the cavity insert (8) has an inward cavity and combines with the upper surface of the plate (19) to form a closed mold cavity. It also includes an upper mold core fixing member (7) and a lower mold core fixing member (10). The characteristic is that, Both the upper mold pin core fixing component (7) and the lower mold pin core fixing component (10) are multi-layered stacked. The pin cores (21) fixed on each layer of the upper mold pin core fixing component (7) and the lower mold pin core fixing component (10) are staggered according to the position of the through holes on the densely packed micro-pore plastic part. The upper mold pin core fixing component (7) located in the lower layer and the lower mold pin core fixing component (10) located in the upper layer are provided with through holes for the pin cores (21) to pass through. The upper mold pin core fixing component (7) is set in the corresponding mounting groove on the upper mold A (2), and the pin cores (21) of the upper mold pin core fixing component (7) extend into the mold cavity. The lower mold pin core fixing component (10) is fixedly connected to the mounting groove on the lower mold core (18), and the pin cores (21) of the lower mold pin core fixing component (10) also extend into the mold cavity. The needle cores (21) on the lower mold needle core fixing member (10) correspond one-to-one with the needle cores (21) on the upper mold needle core fixing member (7) and are coaxially arranged. After the mold is closed, the needle cores (21) on the lower mold needle core fixing member (10) and the needle cores (21) on the upper mold needle core fixing member (7) are in contact at their ends. The upper surface of the plate (19) is set as a plane, and the lower surface of the die insert (8) opens into a cavity and combines with the upper surface of the plate (19) to form a closed mold cavity.

2. The mold for a plastic part with densely packed micropores according to claim 1, characterized in that, An upper clamping plate (12) and a lower clamping plate (13) are provided between the two pads (5) and are connected by bolts. The upper clamping plate (12) and the lower clamping plate (13) clamp the ring formed at the lower end of the ejector rod (11). The upper end of the ejector rod (11) passes through the upper clamping plate (12), the lower mold (4) and the lower mold core (18) in sequence and is fixedly connected to the reinforcing plate (19) by bolts. A through hole is opened on the base plate (6) for the output end of the ejection mechanism to extend. The ejection mechanism is fixedly installed on the frame. The output end of the ejection mechanism is fixedly connected to the lower surface of the lower clamping plate (13). When demolding is required, the ejection mechanism can push the reinforcing plate (19) up, thereby separating the densely packed micro-hole plastic part located on it from the needle core (21) on the lower mold needle core fixing part (10).

3. The mold for a plastic part with densely packed micropores according to claim 2, characterized in that, A fixed guide rod (23) is fixedly connected between the lower mold (4) and the base plate (6). Holes for the fixed guide rod (23) to pass through are opened on the upper clamping plate (12) and the lower clamping plate (13), and a sliding sleeve (22) is fixedly connected in the holes. The sliding sleeve (22) is slidably connected to the fixed guide rod (23).

4. The mold for a plastic part with densely packed micropores according to claim 3, characterized in that, The upper clamping plate (12) and the lower clamping plate (13) clamp the ring formed at the lower end of the movable guide rod (16). The movable guide rod (16) passes through the lower mold (4) and contacts the lower surface of the upper mold B (3). That is, the movable guide rod (16) is located on one side of the groove opened on the lower surface of the upper mold B (3). A spring (17) is sleeved on part of the movable guide rod (16) between the upper clamping plate (12) and the lower mold (4). When the upper clamping plate (12) and the lower clamping plate (13) are moved upward by the ejection mechanism, the upper mold assembly can be lifted at the same time.

5. The mold for a plastic part with densely packed micropores according to claim 4, characterized in that, A positioning rod (9) is clamped between the upper mold core (20) and the upper mold B (3), and a positioning hole is provided on the lower mold core (18) for the positioning rod (9) to be inserted.

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