CN116587483A - A mold with densely covered micro-pore plastic parts - Google Patents

Abstract

The invention discloses a mold for densely covered micro-pore plastic parts, which comprises a top plate, an upper mold A, an upper mold B, a lower mold, a cushion block and a bottom plate. The upper mold B is fixedly connected by bolts; the lower part of the upper mold B is detachably connected to the lower mold through guide columns, and the bottom of the lower mold and the positions close to its opposite sides are respectively fixedly connected with two pads by bolts; The cores are distributed in the upper mold and the lower mold. Because the needle cores are dense and the number is too large, the multi-layer staggered stacking combination solves the problem that the needle cores are densely packed and cannot be fixed. The tightness of the parts can solve the problem of large tightness between the needle core and the plastic parts when the depth of the hole is large, and avoid the phenomenon of sticking to the front mold when the plastic parts are out of the mold, and the plastic parts and nozzles staying in the back mold are under the action of the clamp Quickly separate and fall off, realize the rapid separation of the plastic part and the nozzle when the mold is opened, and realize fully automated production.

Description

A mold with densely covered micro-pore plastic parts

technical field

The invention relates to a mold, in particular to a mold for plastic parts with dense micro-pores (144 pores with a diameter of 0.90 mm and a depth of 7.5 mm are evenly distributed within the range of a unit area of 48x5.5).

Background technique

Plastic parts densely covered with micro-pores are plastic workpieces with several through holes (as shown in Figure 1). At present, the molds used for the production of such products still adopt the traditional ejector design, and the ejector mechanism has sticky molds and Plastic parts have deformation defects and are unreliable.

Contents of the invention

The object of the present invention is to provide a plastic part mold with dense micro-pores to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A mold for plastic parts densely covered with micro-pores, including an upper mold needle core fixing part and a lower mold needle core fixing part, is characterized in that the upper mold needle core fixing part and the lower mold needle core fixing part are stacked in multiple layers, and each layer The needle core fixing parts of the upper mold and the needle core fixing parts of the lower mold are all staggered and distributed according to the positions of the through holes on the plastic parts densely covered with micro pores, and the upper mold needle fixing parts on the lower layer and the lower ones on the upper layer The needle core fixing parts of the mold are provided with through holes for the needle core to pass through; the needle core fixing parts of the upper mold are arranged in the corresponding installation grooves on the upper mold A, and the needle core of the needle core fixing parts of the upper mold extends into the mold cavity ; The lower mold core also offers an installation groove and is fixedly connected to the lower mold needle core fixing piece, and the needle core of the lower mold needle core fixing piece also extends into the mold cavity.

As a further solution of the present invention: the needle cores on the needle core fixing part of the lower mold correspond to the needle cores on the needle core fixing part of the upper mold one by one and are arranged coaxially. The needle core is in contact with the needle core end on the upper mold needle core holder.

As a further solution of the present invention: the upper surface of the stencil is set as a plane, and the lower surface of the die insert opens a mold cavity inwardly and combines with the upper surface of the stencil to form a closed mold cavity.

As a further solution of the present invention: an upper splint and a lower splint connected by bolts are arranged between the two pads, and a circular ring formed by clamping the lower end of the push rod is clamped between the upper splint and the lower splint, and the upper end of the push rod is sequentially After passing through the upper splint, the lower mold and the lower mold core, it is fixedly connected with the stencil plate by bolts. The bottom plate is provided with a through hole for the output end of the ejector mechanism to protrude. The ejector mechanism is fixedly installed on the frame. The output end is fixedly connected to the lower surface of the lower splint. Through the work of the ejector mechanism, when the mold needs to be demoulded, the clamping plate can be pushed, so that the plastic parts with dense micro-pores on it and the needle core fixing part of the lower mold can be placed on it. The needle core is separated.

As a further solution of the present invention: the lower mold and the bottom plate are fixedly connected with the fixed guide rod, the upper splint and the lower splint are provided with holes for the fixed guide rod to pass through and the sliding sleeve is fixedly connected in the hole, the sliding sleeve and the fixed guide rod Sliding connection, part of the fixed guide rod between the upper splint and the lower mold is covered with a spring, that is, the spring is used to assist the reset after the ejector mechanism is reset;

As a further solution of the present invention: between the upper splint and the lower splint, the ring formed at the lower end of the movable guide rod is clamped, and 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 the upper mold On the side of the groove on the lower surface of B, a spring is set on the part of the movable guide rod between the upper splint and the lower die. When the upper splint and the lower splint are driven by the ejector mechanism, the upper die assembly can be jacked up at the same time.

As a further solution of the present invention: a positioning rod is clamped between the upper die core and the upper die B, and a positioning hole for positioning and inserting the positioning rod is opened on the lower die core.

Compared with the prior art, the beneficial effect of the present invention is: the present invention distributes the needle cores into the upper mold and the lower mold. Because the needle cores are dense and the number is too large, multi-layer staggered stacking and combination can solve the problem that the needle cores are densely distributed. For the problem of fixing the needle core hanging table, the needle core is twitched first and then the plastic part is removed to solve the problem of the needle core and the plastic part being tightly wrapped when the depth of the hole is large, so as to avoid the plastic part from sticking to the front mold when it is released from the mold The phenomenon occurs, and the plastic parts and nozzles staying in the rear mold are quickly separated and fall off under the action of the clamping plate, which solves the problem of difficult demoulding; the invention increases the area pushed out during demoulding by setting the clamping plate structure, making the appearance of the plastic parts more beautiful Good, no defects such as thimble marks.

Description of drawings

Figure 1a is a front view of a plastic part produced by a plastic part mold with dense micro-pores.

Figure 1b is a side view of a plastic part produced by a plastic part mold with dense micro-pores.

Figure 1c is a top view of a plastic part produced by a plastic part mold with dense micro-pores.

Fig. 1d is a three-dimensional structure diagram of a plastic part produced by a plastic part mold with dense micro-pores.

Fig. 2 is a three-dimensional schematic diagram of a mold for a plastic part densely covered with micro-pores.

Fig. 3 is a schematic diagram of taking out the upper mold assembly from the mold of the plastic part densely covered with micro-pores.

Fig. 4 is a schematic diagram of a cross-section in a mold of a plastic part densely covered with micro-pores.

Fig. 5 is a schematic diagram of a longitudinal section in a mold of a plastic part densely covered with micro-pores.

Fig. 6 is a schematic diagram of the staggered distribution of needle cores on the needle core fixing part of the upper mold in the plastic part mold with dense micro-pores.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 2 to 6. In an embodiment of the present invention, a mold for densely covered micro-pore plastic parts includes a top plate 1, an upper mold A2, an upper mold B3, a lower mold 4, a spacer 5 and a bottom plate 6. The top plate 1 The upper die A2 is fixedly connected by bolts, and the lower part of the upper die A2 is connected with the upper die B3 by bolts, that is, the upper die assembly is composed of the top plate 1, the upper die B3 and the upper die A2; Disassemble and connect the lower mold 4, the bottom of the lower mold 4 and the positions close to the opposite sides thereof are fixedly connected with two pads 5 by bolts respectively, and the pads 5 are fixedly connected to the bottom plate 6;

The upper surface of the lower mold 4 is provided with a groove and the lower mold core 18 is installed, the upper surface of the lower mold core 18 is provided with a groove and the stencil 19 is slidably installed; the lower surface of the upper mold B3 is provided with a groove and fixedly connected to the upper surface. The mold core 20 and the upper mold core 20 are provided with through grooves according to the number of mold cavities of the mold and are fixedly connected to the die insert 8; according to the shape of the plastic part densely covered with micro pores, the upper surface of the mold plate 19 can be set as a plane , The lower surface of the die insert 8 opens a cavity inwardly and combines with the upper surface of the Lebanese plate 19 to form a closed cavity.

According to the number of mold cavities of an actual mold, the described upper mold needle core holder 7 is set, and the fixed position of the multilayer needle core 21 on the lower mold needle core holder 10 is more than that on the upper mold needle core holder 7 The fixed positions of the needle cores 21 of the layers all adopt a structure of staggered distribution. The upper mold needle core fixing part 7 and the lower mold needle core fixing part 10 are all stacked in multiple layers, and the needle cores 21 fixed on the upper mold needle core fixing part 7 and the lower mold needle core fixing part 10 of each layer are all according to the densely distributed micro fine The positions of the through holes on the hole plastic part are staggered, and the upper mold needle core fixing part 7 on the lower layer and the lower mold needle core fixing part 10 on the upper layer are all provided with through holes for the needle core 21 to pass through. Specifically, the needle core 21 is divided into multiple rows according to the distribution of the holes of the densely covered micro-pore plastic parts, and each row corresponds to a layer of upper mold needle core holder 7 or lower mold needle core holder 10; The needle core fixing part 7 is arranged in the installation groove correspondingly opened on the upper mold A2. The upper mold needle core fixing part 7 is a metal block and is fixedly connected with several vertically downward needle cores 21 for hole forming. The upper mold needle core The needle core 21 of the fixture 7 passes through the upper mold B3 and the die insert 8 and is arranged in the mold cavity; the lower mold core 18 is also provided with an installation groove and is fixedly connected to the lower mold needle core fixture 10, and the lower mold needle The core fixing part 10 is fixedly connected with several upward needle cores 21, and the needle cores 21 of the lower mold needle core fixing part 10 pass through the curb 19 and extend into the mold cavity; The needle core 21 and the needle core 21 on the upper mold needle core holder 7 can be arranged in one-to-one correspondence and coaxially. It may or may not be in contact with the end of the needle core 21 on the upper mold needle core fixture 7 .

A positioning rod 9 is clamped between the upper die core 20 and the upper die B3, and a positioning hole for positioning and inserting the positioning rod 9 is provided on the lower die core 18 .

An upper splint 12 and a lower splint 13 connected by bolts are arranged between the two spacers 5, and the upper splint 12 and the lower splint 13 are clamped between the lower end of the push rod 11 to form a ring, and the upper end of the push rod 11 is sequentially After passing through the upper splint 12, the lower mold 4 and the lower mold core 18, it is fixedly connected with the clamping plate 19 by bolts, and the bottom plate 6 is provided with a through hole for the output end of the ejector mechanism to protrude, and the ejector mechanism is fixedly installed on the frame , the output end of the ejector mechanism is fixedly connected to the lower surface of the lower splint 13, when the work of the ejector mechanism needs to be demoulded, the pin plate 19 can be pushed up, so that the plastic parts with dense micro-pores on it and the The needle core 21 on the lower mold needle core fixing part 10 is separated.

The ejection mechanism may be a hydraulic push rod and adopts an existing control method.

The fixed guide rod 23 is fixedly connected between the lower die 4 and the base plate 6, the upper clamping plate 12 and the lower clamping plate 13 are provided with holes for the fixed guide rod 23 to pass through and the sliding sleeve 22 is fixedly connected in the hole, and the sliding sleeve 22 is connected with the fixed guide rod. The rod 23 is slidingly connected, and the part of the fixed guide rod 23 between the upper splint 12 and the lower mold 4 is covered with a spring 17, that is, the spring is used to assist the reset after the ejector mechanism is reset;

The circular ring formed at the lower end of the movable guide rod 16 is clamped between the upper clamping plate 12 and the lower clamping plate 13, and 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 positioned at the upper mold B3 On the side of the groove provided on the lower surface, a spring 17 is set on the part of the movable guide rod 16 between the upper splint 12 and the lower mold 4, and the upper splint 12 and the lower splint 13 can be simultaneously jacked up when the ejector mechanism drives them up. The upper mold assembly can make the needle core 21 of the upper mold needle core fixing part 7 and the diameter of the plastic part densely covered with micro-pores realize a pre-loosening, so as to facilitate demoulding.

A plurality of drawing rods 24 passing through the lower die 4 and the drawing board 19 are also fixed on the bottom plate 6, and the parts of the drawing rods 24 protruding from the upper surface of the drawing board 19 are integrally formed into an inverted conical shape, that is, after forming and solidifying, it can Make the nozzle and plastic parts stay in the back mold.

Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or perform equivalent replacements for some of the technical features. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a mould is moulded to fine pore densely covered, including last mould needle core mounting (7) and lower mould needle core mounting (10), its characterized in that, go up mould needle core mounting (7) and lower mould needle core mounting (10) and be the multilayer and pile up, the last mould needle core mounting (7) of every layer and fixed needle core (21) on lower mould needle core mounting (10) stagger according to the through-hole position on the fine pore densely covered mould, and all offer the through-hole that supplies needle core (21) to pass through on last mould needle core mounting (7) and the lower mould needle core mounting (10) that are located the upper strata that are located the lower floor; the upper die needle core fixing piece (7) is arranged in a correspondingly arranged mounting groove on the upper die A (2), and a needle core (21) of the upper die needle core fixing piece (7) extends into the die cavity; the lower die needle core fixing piece (10) is fixedly connected in a mounting groove formed in the lower die core (18), and a needle core (21) of the lower die needle core fixing piece (10) also stretches into the die cavity.

2. The densely-distributed micro-pore plastic part mold according to claim 1, wherein the needle cores (21) on the lower mold needle core fixing piece (10) are in one-to-one correspondence with the needle cores (21) on the upper mold needle core fixing piece (7) and are coaxially arranged, and after mold clamping, the needle cores (21) on the lower mold needle core fixing piece (10) are in contact with the end parts of the needle cores (21) on the upper mold needle core fixing piece (7).

3. The densely-distributed micro-pore plastic part mold according to claim 1 or 2, wherein the upper surface of the tie plate (19) is provided as a plane, and the lower surface of the die insert (8) is internally provided with a cavity and is combined with the upper surface of the tie plate (19) to form a closed cavity.

4. The densely-distributed micro-pore plastic part mold according to claim 3, wherein an upper clamping plate (12) and a lower clamping plate (13) which are in compound connection through bolts are arranged between the two cushion blocks (5), a ring formed at the lower end of a push rod (11) is clamped between the upper clamping plate (12) and the lower clamping plate (13), the upper end of the push rod (11) sequentially penetrates through the upper clamping plate (12) and a lower die core (18) of a lower die (4) and then is fixedly connected with a tightening plate (19) through bolts, a through hole for the output end of an ejection mechanism to extend out is formed in the bottom plate (6), the ejection mechanism is fixedly arranged on a frame, the output end of the ejection mechanism is fixedly connected to the lower surface of the lower clamping plate (13), and the tightening plate (19) can be pushed upwards when demolding is needed through the operation of the ejection mechanism, so that the densely-distributed micro-pore plastic part positioned on the upper clamping plate is separated from a needle core (21) on a needle core fixing part (10) of the lower die.

5. The densely-distributed micro-pore plastic part mold according to claim 4, wherein a fixed guide rod (23) is fixedly connected between the lower mold (4) and the bottom plate (6), holes for the fixed guide rod (23) to pass through are formed in the upper clamping plate (12) and the lower clamping plate (13), a sliding sleeve (22) is fixedly connected in the holes, the sliding sleeve (22) is in sliding connection with the fixed guide rod (23), and a spring (17) is sleeved on part of the fixed guide rod (23) between the upper clamping plate (12) and the lower mold (4), namely, the spring is used for assisting in resetting after the ejection mechanism is reset.

6. The densely-distributed micro-pore plastic part mold according to claim 5, wherein a circular ring formed at the lower end of a movable guide rod (16) is clamped between the upper clamping plate (12) and the lower clamping plate (13), the movable guide rod (16) penetrates through the lower mold (4) and contacts the lower surface of the upper mold (B3), namely, the movable guide rod (16) is positioned at one side of a groove formed in 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), and the upper mold assembly can be jacked up simultaneously when the upper clamping plate (12) and the lower clamping plate (13) are driven to move upwards by an ejection mechanism.

7. The densely-distributed micro-pore plastic part mold according to claim 6, wherein a positioning rod (9) is clamped between the upper mold core (20) and the upper mold B (3), and a positioning hole for positioning and inserting the positioning rod (9) is formed in the lower mold core (18).