Two-color injection mold and injection molding method

Abstract

The present invention provides a two-color injection mold and an injection molding method. The mold includes a one-color front mold, a two-color front mold and a rear mold. The rear mold is provided with a positioning seat, a rear positioning kit and a positioning ring. The positioning seat protrudes from the middle surface of the rear positioning kit. The positioning ring is sleeved on the positioning seat. The outer side of the positioning ring is sleeved with an annular mesh cloth. The one-color front mold is provided with a one-color front positioning piece and four one-color sliding components. The one-color front positioning piece is connected to the positioning seat. The one-color sliding component includes a one-color main slider, a one-color sliding component and a one-color oblique guide rod. The one-color oblique guide rod drives the one-color main slider to move along the vertical mold opening direction. The one-color main slider is fixedly connected to the one-color sliding component. The four one-color sliding components are surrounded by the outer periphery of the positioning ring. Two mutually unconnected one-color mold cavities are formed between the rear positioning kit, the positioning ring, the one-color front positioning piece and the four one-color sliding components. The end of the annular mesh cloth extends into the one-color mold cavity. The present invention is used to produce mesh filter components and has the advantage of high production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and in particular to a double-color injection molding mold and an injection molding method. Background Art

[0002] The vacuum cleaner includes a mesh filter assembly, such as Figure 1 and Figure 2 As shown, the mesh filter assembly includes an annular mesh, a first plastic ring, a second plastic ring, a third plastic ring and two magnets. The annular mesh is a cotton cloth with filter holes and is soft in texture. The first plastic ring and the second plastic ring are respectively arranged at the upper and lower ends of the annular mesh in the axial direction, and the first plastic ring and the second plastic ring are made of the same material and color. The third plastic ring is arranged on the inner side of the first plastic ring and is fixedly connected to the first plastic ring. Two mounting holes are arranged on the inner side of the first plastic ring, and the two mounting holes are arranged oppositely. The magnet is arranged in the mounting hole and is fixedly connected between the first plastic ring and the third plastic ring.

[0003] The existing production method of mesh filter components generally uses glue to manually bond the plastic ring to the annular mesh. Since the annular mesh is relatively soft, it is difficult to ensure that the annular mesh does not wrinkle during bonding. Once wrinkled, it is difficult to fix the annular mesh to the entire peripheral wall of the plastic ring, resulting in perforations between the annular mesh and the plastic ring, resulting in unqualified products. Therefore, the existing method relies on manual production, which has the disadvantages of low production efficiency and high product unqualified rate. Summary of the invention

[0004] The first object of the present invention is to provide a two-color injection mold which can be used to produce a mesh filter assembly and has high production efficiency.

[0005] A second object of the present invention is to provide an injection molding method comprising the above-mentioned two-color injection mold.

[0006] In order to achieve the aforementioned first purpose, the present invention provides a two-color injection mold, comprising a one-color front mold, a two-color front mold and a rear mold, the rear mold is sequentially matched and connected with the one-color front mold and the two-color front mold, the rear mold is provided with a positioning seat, a rear positioning kit and a positioning ring, the rear positioning kit is sleeved on the axial middle part of the positioning seat, one end of the positioning seat protrudes from the surface of the rear positioning kit, the positioning ring is detachably sleeved on the positioning seat, and the outer side of the positioning ring is detachably sleeved with an annular mesh cloth; the one-color front mold is provided with a one-color front positioning piece and four one-color sliding position components, the one-color front positioning piece is matched and connected with the positioning seat, the one-color sliding position component includes a one-color main slider, a one-color sliding position piece and a one-color oblique guide rod, the one-color main slider is connected with a one-color sliding position piece. The one-color positioning piece is fixedly connected, and the one-color positioning piece is arranged on the rear positioning kit. The four one-color positioning pieces are surrounded by the outer circumference of the positioning ring. Two one-color mold cavities are formed between the rear positioning kit, the positioning ring, the one-color front positioning piece and the four one-color positioning pieces. The two one-color mold cavities are respectively located at the two ends of the axial direction of the annular mesh cloth, and the two one-color mold cavities are not connected to each other. The ends of the annular mesh cloth extend into the corresponding one-color mold cavities respectively, and two one-color glue feed channels are arranged between two adjacent one-color positioning pieces. The two one-color glue feed channels are respectively connected to the two one-color mold cavities. The one-color main slider is slidably connected to the one-color oblique guide rod, and the one-color oblique guide rod can drive the one-color main slider and the one-color positioning piece to move along the vertical mold opening direction.

[0007] It can be seen from the above scheme that a positioning ring is provided to support the annular mesh cloth from the inside to the outside, so as to prevent the annular mesh cloth from being deformed at will and facilitate subsequent injection molding operations; the present invention fixes the annular mesh cloth and the positioning ring together on the positioning seat of the rear mold, and then surrounds the outer periphery of the positioning ring through four one-color sliding parts, and with the cooperation of the rear positioning kit and the one-color front positioning parts, two one-color mold cavities are formed on the outer periphery of the positioning ring, and the annular mesh cloth extends into the one-color mold cavity. After one-color injection molding, two one-color plastic rings are formed at both ends of the annular mesh cloth at one time, and the annular mesh cloth is tightly connected to the plastic part. Compared with the prior art, the present invention has the advantages of high production efficiency and high product qualification.

[0008] A further solution is that the ends of the annular mesh cloth protrude from the axial ends of the positioning ring respectively; two arc-shaped flanges are protrudingly provided on one side of a color positioning member toward a color mold cavity, and the two arc-shaped flanges are arranged along the axial direction of the positioning ring, and the arc-shaped flanges press the annular mesh cloth toward the outer peripheral wall of the positioning ring.

[0009] It can be seen from the above scheme that by setting an arc-shaped flange, the end of the annular mesh cloth is pressed tightly against the outer wall of the positioning ring. On the one hand, it is used to seal the one-color mold cavity, which is beneficial to prevent leakage of liquid glue. On the other hand, the liquid glue in the one-color mold cavity can be gathered in the one-color mold cavity and the outer surface of the end of the annular mesh cloth, preventing the liquid glue from entering the inner side of the end of the annular mesh cloth and preventing the annular mesh cloth from being exposed, which is beneficial to ensure that the plastic ring is located outside the annular mesh cloth, thereby ensuring the quality and aesthetics of the product.

[0010] A further solution is that two opposite one-color sliders are respectively provided with one-color protrusions, the two one-color protrusions are arranged opposite to each other, both extend into the same one-color mold cavity and abut against the outer peripheral wall of the positioning ring.

[0011] It can be seen from the above scheme that by providing a single-color protrusion, after single-color injection molding, a perforation is formed on a plastic ring of the semi-finished workpiece, which facilitates the smooth implementation of subsequent two-color injection molding.

[0012] A further solution is that inclined slide grooves are respectively provided on both sides of the one-color main slider, and the inclined slide grooves are parallel to the one-color inclined guide rods; the one-color sliding position assembly also includes two one-color side sliders, and the two one-color side sliders are respectively provided on both sides of the one-color main slider, and the one-color side sliders are provided with inclined protrusions, which are cooperated and connected with the inclined slide grooves, and the one-color side sliders can drive the one-color main slider to move along the vertical mold opening direction.

[0013] It can be seen from the above scheme that since the single-color sliding member is large in size and heavy in weight, by setting a single-color side slider, when opening the mold, it can assist the inclined guide rod to drive the single-color main slider to slide along the direction perpendicular to the mold opening, which is beneficial to reduce the force on the inclined guide rod, prevent the inclined guide rod from breaking, and extend the service life of the mold.

[0014] A further solution is that the single-color front positioning piece is provided with a single-color positioning protrusion and multiple single-color elastic push blocks, the single-color positioning protrusion is arranged on the side of the single-color front positioning piece facing the positioning seat, the single-color positioning protrusion is matched with the positioning seat, the single-color elastic push block penetrates the single-color front positioning piece along the mold opening direction, the multiple single-color elastic push blocks are respectively arranged around the single-color positioning protrusion, and the single-color elastic push blocks can protrude from the surface of the single-color front positioning piece and abut against the positioning seat and the positioning ring.

[0015] It can be seen from the above scheme that by setting a single-color positioning protrusion to cooperate with the convex-concave of the positioning seat, it is beneficial to improve the connection strength between the single-color front positioning piece and the positioning seat; by setting multiple single-color elastic push blocks, when opening the mold, the single-color elastic push blocks can protrude from the lower surface of the single-color front positioning piece to apply a force to the positioning seat and the positioning ring to prevent the positioning seat and the positioning ring from moving with the single-color front positioning piece.

[0016] A further solution is that the two-color front mold is provided with a two-color front positioning piece and four two-color sliding components, the two-color front positioning piece is cooperatively connected with the positioning seat, the two-color sliding component includes a two-color main slider, a two-color sliding piece and a two-color oblique guide rod, the two-color main slider is fixedly connected with the two-color sliding piece, the four two-color sliding pieces are surrounded by the outer periphery of the positioning ring, a two-color mold cavity is formed between the positioning ring, the two-color front positioning piece and the four two-color sliding pieces, a two-color glue feed channel is provided between two adjacent two-color sliding pieces, the two-color glue feed channel is connected with the two-color mold cavity, the two-color main slider is slidably connected with the two-color oblique guide rod, and the two-color oblique guide rod can drive the two-color main slider to move along the vertical mold opening direction.

[0017] It can be seen from the above scheme that by setting four two-color sliding parts to enclose the outer periphery of the semi-finished workpiece, and forming a two-color mold cavity with the cooperation of the positioning ring and the two-color front positioning parts, the two-color glue inlet channel passes through the through-hole of the semi-finished workpiece and extends into the two-color mold cavity, so as to realize the injection molding of the third plastic ring from the outer surface of the first plastic ring to the inner part of the first plastic ring.

[0018] A further solution is that the rear mold is also provided with four locking pieces, the locking pieces are arranged around the positioning seats, the locking pieces are provided with locking arms, and the locking arms extend outward along the vertical mold opening direction; a one-color locking slider is provided at one end of the one-color main slider facing the rear mold, a one-color locking hole is provided between the one-color locking slider and the one-color main slider, and the locking arm is detachably connected to the one-color locking hole; a two-color locking slider is provided at one end of the two-color main slider facing the rear mold, a two-color locking hole is provided between the two-color locking slider and the two-color main slider, and the locking arm is detachably connected to the two-color locking hole.

[0019] It can be seen from the above scheme that by arranging a locking piece on the rear mold and arranging locking holes slidably connected to the locking piece at the bottom of the one-color main slider and the two-color main slider respectively, the rear mold can be tightly connected to the main slider when the mold is closed, which is beneficial to ensure the smooth progress of injection molding and improve the injection molding quality of the product.

[0020] A further solution is that the two-color front positioning component includes a first positioning block, a second positioning block and a plurality of two-color elastic push blocks, a mounting hole is penetrated through the middle part of the first positioning block, a convex ring portion is arranged on the outer periphery of one end of the mounting hole facing the positioning seat, the second positioning block is arranged in the mounting hole, the second positioning block protrudes out of the mounting hole toward one end of the positioning seat, an annular groove is formed between the second positioning block and the convex ring portion, and the annular groove is connected with the two-color mold cavity; a two-color positioning protrusion is also arranged at one end of the second positioning block facing the positioning seat, and the two-color positioning protrusion is matched with the positioning seat; a plurality of two-color elastic push blocks are respectively arranged around the two-color positioning protrusion, and the two-color elastic push blocks can protrude from the surface of the second positioning block and abut against the positioning seat and the positioning ring.

[0021] In order to achieve the aforementioned second objective, the present invention provides an injection molding method, including the above two-color injection mold, and the injection molding method includes the following steps:

[0022] The annular mesh cloth is placed on the positioning ring so that both ends of the positioning ring protrude from the ends of the annular mesh cloth;

[0023] Putting a positioning ring with an annular mesh cloth on the positioning seat of the rear mold;

[0024] The one-color front mold and the rear mold are combined and one-color injection molding is performed to obtain a semi-finished workpiece sleeved on the positioning ring, wherein the semi-finished workpiece includes a first plastic ring and a second plastic ring fixedly connected to the two axial ends of the annular mesh cloth, and a through hole is opened on the first plastic ring, and the through hole penetrates the first plastic ring along the radial direction of the positioning ring;

[0025] The one-color front mold and the rear mold are opened, and the rear mold and the two-color front mold are closed and two-color injection molding is performed to obtain a finished workpiece sleeved on the positioning ring, wherein the glue inlet flow channel of the two-color front mold passes through the through hole and extends into the interior of the first plastic ring, so that a third plastic ring is injection molded inside the first plastic ring, and the third plastic ring is fixedly connected to the first plastic ring;

[0026] The rear mold and the two-color front mold are opened, and the finished workpiece and the positioning ring are taken out and separated.

[0027] It can be seen from the above scheme that the mesh filter assembly is injection molded by the two-color injection molding method, which is beneficial to improving production efficiency on the one hand, and is beneficial to ensuring product quality and improving product qualification rate on the other hand.

[0028] A further solution is that before the rear mold and the two-color front mold are molded together, two magnets are placed on the first plastic ring, wherein two mounting holes are provided on the inner side of the first plastic ring, the two mounting holes are arranged opposite to each other, and the magnets are arranged in the mounting holes;

[0029] After two-color injection molding, the magnet piece is fixed between the first plastic ring and the third plastic ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of a semi-finished workpiece formed by one-color injection molding according to an embodiment of the present invention.

[0031] Figure 2 It is a structural diagram of a finished workpiece formed by two-color injection molding according to an embodiment of the present invention.

[0032] Figure 3 It is a cross-sectional view of a single-color injection mold in an embodiment of a two-color injection mold of the present invention from a first viewing angle.

[0033] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0034] Figure 5 It is a cross-sectional view of a single-color injection mold from a second viewing angle in an embodiment of a two-color injection mold of the present invention.

[0035] Figure 6 It is a structural schematic diagram of a single-color injection mold in an embodiment of a double-color injection mold of the present invention.

[0036] Figure 7It is an exploded view of a positioning seat and a single-color sliding position component in an embodiment of a two-color injection mold of the present invention.

[0037] Figure 8 yes Figure 7 Enlarged view of point B in the middle.

[0038] Fig. 9 It is a cross-sectional view of a front positioning member of one color in an embodiment of a two-color injection mold of the present invention.

[0039] Fig.10 It is an exploded view of a positioning seat, a rear positioning kit and a positioning ring in an embodiment of a two-color injection mold of the present invention.

[0040] Fig.11 4 is a cross-sectional view of a two-color injection mold in an embodiment of the two-color injection mold of the present invention.

[0041] Fig.12 yes Fig.11 Enlarged view of point C in the middle.

[0042] Fig.13 1 is a schematic structural diagram of a two-color injection mold in an embodiment of the two-color injection mold of the present invention.

[0043] Fig.14 It is an exploded view of the positioning seat and the two-color slide assembly in the embodiment of the two-color injection mold of the present invention.

[0044] Fig.15 It is a cross-sectional view of a two-color front positioning member in an embodiment of a two-color injection mold of the present invention.

[0045] Fig.16 yes Fig.15 Enlarged view of point D in the middle.

[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0047] See also Figure 1 and Figure 2The product to be produced in this embodiment is a mesh filter assembly 1 for a vacuum cleaner, and the mesh filter assembly 1 includes an annular mesh 11, a first plastic ring 12, a second plastic ring 13, a third plastic ring 14, and two magnets 15. The annular mesh 11 is a cotton cloth with filter holes, and its texture is soft. The first plastic ring 12 and the second plastic ring 13 are respectively arranged at the upper and lower ends of the annular mesh 11 in the axial direction, and the first plastic ring 12 and the second plastic ring 13 are made of the same material and color. The third plastic ring 14 is arranged on the inner side of the first plastic ring 12 and is fixedly connected to the first plastic ring 12. The color of the third plastic ring 14 is different from that of the first plastic ring 12. Two mounting holes 121 are provided on the inner side of the first plastic ring 12 along its axial direction. The two mounting holes 121 are arranged opposite to each other, and are preferably arranged symmetrically with respect to the center line of the first plastic ring 12. The magnet 15 is arranged in the mounting hole 121 and is fixedly connected between the first plastic ring 12 and the third plastic ring 14. The first plastic ring 12 , the second plastic ring 13 and the annular mesh cloth 11 can be obtained by one-color injection molding, that is, a semi-finished workpiece 10 is obtained, and then the third plastic ring 14 is injection molded on the semi-finished workpiece 10 through a two-color injection mold, and finally a finished workpiece: a mesh cloth filter assembly 1 is obtained.

[0048] Two-color injection mold example

[0049] See also Figure 3 and Fig.11 The two-color injection mold of this embodiment includes a single-color front mold 2, a two-color front mold 3 and two rear molds 4. The two rear molds 4 are arranged side by side on a rotating device that can rotate 180°. The rear mold 4 is first connected with the single-color front mold 2 to perform single-color injection molding. Then, after being rotated 180° by the rotating device, the rear mold 4 is connected with the two-color front mold 3 to perform two-color injection molding.

[0050] See also Figures 3 to 7 , and combined with Fig.10The rear mold 4 includes a rear mold bottom plate 41 and a rear mold plate 42 from bottom to top. Two lower injection molding stations are arranged on the rear mold plate 42 for simultaneously injecting two semi-finished workpieces 10. A positioning seat 43, a rear positioning kit 44 and a positioning ring 45 are arranged in the lower injection molding station. The lower portion of the positioning seat 43 is fixedly connected to the rear mold bottom plate 41. The upper portion of the positioning seat 43 protrudes upward through the rear mold plate 42. The rear positioning kit 44 is sleeved on the middle portion of the positioning seat 43. The upper portion of the positioning seat 43 protrudes from the surface of the rear positioning kit 44. The upper portion of the positioning seat 43 is also provided with a step portion 431. The positioning ring 45 is detachably sleeved on the upper portion of the positioning seat 43 and is located on the step portion 431. The outer peripheral wall of the positioning seat 43 and the inner peripheral wall of the positioning ring 45 are respectively provided with mutually matching foolproof structures. In this embodiment, a plane is preferably added to the arc-shaped peripheral wall to limit the positioning ring 45 from rotating relative to the positioning seat 43, and to limit the installation angle of the positioning ring 45 to be consistent each time it is installed on the positioning seat 43. The outer side of the positioning ring 45 is detachably sleeved with an annular mesh 11, and the two axial ends of the positioning ring 45 protrude the corresponding ends of the annular mesh 11 respectively. In order to facilitate the positioning of the annular mesh 11, it is preferred to set the outer peripheral wall of the positioning ring 45 to a structure with a small middle and large ends, and the annular mesh 11 is sleeved on the middle through one end.

[0051] The one-color front mold 2 includes, from bottom to top, a one-color front mold plate 21, a one-color front ejector plate 22, a one-color front mold base 23 and a one-color front top plate 24. The one-color front top plate 24 is provided with a one-color glue inlet 241. The one-color front mold 2 is also provided with a one-color flow channel. One end of the one-color flow channel is connected to the one-color glue inlet 241. The other end of the one-color flow channel passes through the one-color front mold base 23, the one-color front ejector plate 22 and the one-color front mold plate 21 and extends to the one-color mold cavity 27. The one-color front mold plate 21 is provided with two one-color injection upper stations, which are arranged correspondingly to the injection lower station.

[0052] The one-color injection molding upper station is provided with a one-color front positioning member 25 and four one-color slider assemblies 26, and the one-color front positioning member 25 is connected with the positioning seat 43. The one-color slider assembly 26 includes a one-color main slider 261, a one-color slider 262 and a one-color oblique guide rod 263, the one-color main slider 261 is fixedly connected with the one-color slider 262, the one-color slider 262 is set as a quarter arc block, and the four one-color sliders 262 are enclosed in a circle and arranged on the outer periphery of the positioning ring 45. The one-color positioning member 262 is arranged on the rear positioning kit 44. Two one-color mold cavities 27 are formed between the rear positioning kit 44, the positioning ring 45, the one-color front positioning member 25 and the four one-color positioning members 262. The two one-color mold cavities 27 are respectively located at the two ends of the axial direction of the annular mesh cloth 11, and the two one-color mold cavities 27 are not connected to each other. The ends of the annular mesh cloth 11 extend into the corresponding one-color mold cavities 27 respectively, so that the first plastic ring 12 and the second plastic ring 13 of the one-color injection molding are both fixedly connected to the annular mesh cloth 11. The connection between two adjacent one-color positioning members 262 is provided with two one-color glue feed channels 271, one above and one below. The first ends of the two one-color glue feed channels 271 are respectively connected to the one-color channel, and the second ends of the two one-color glue feed channels 271 are respectively connected to the two one-color mold cavities 27.

[0053] The one-color main slider 261 is slidably connected with the one-color oblique guide rod 263, and the one-color oblique guide rod 263 can drive the one-color main slider 261 and the one-color slider 262 to move along the vertical mold opening direction. Specifically, the upper part of the one-color oblique guide rod 263 is fixedly connected with the one-color front template 21, and the lower part of the one-color oblique guide rod 263 is inserted into the oblique sliding hole of the one-color main slider 261, and the oblique sliding hole includes a first stepped hole and a second stepped hole that are interconnected, and the diameter of the second stepped hole is larger than the diameter of the first stepped hole. The upper part of the oblique guide rod is provided with a spring bar 28, which is provided in the second stepped hole and elastically abuts against the one-color front template 21 and the second stepped hole, and is used to apply an oblique downward force to the one-color main slider 261 when the mold is opened, and can prevent the one-color main slider 261 from moving up with the one-color front template 21 for a period of time, so as to play a role of delaying action.

[0054] Combination Figure 4 , Figure 7 and Figure 8 Each single-color positioning member 262 is provided with two arc-shaped flanges 2621 protruding toward one side of the single-color mold cavity 27, and the two arc-shaped flanges 2621 are arranged along the axial direction of the positioning ring 45. The arc-shaped flanges 2621 on the four single-color positioning members 262 form two circles arranged up and down, and the arc-shaped flanges 2621 are used to press the annular mesh cloth 11 against the outer peripheral wall of the positioning ring 45, so that the thickness of the annular mesh cloth 11 is compressed to the minimum, and the connection port between the single-color mold cavity 27 and the annular mesh cloth 11 is blocked to prevent liquid glue from flowing from the connection hole to the middle of the annular mesh cloth 11.

[0055] The two opposite one-color guide members 262 are respectively provided with one-color raised portions 2622, and the two one-color raised portions 2622 are arranged opposite to each other, preferably symmetrically arranged with respect to the center line of the positioning ring 45, and the two one-color raised portions 2622 are both extended into the one-color mold cavity 27 of the first plastic ring 12 and abut against the outer peripheral wall of the positioning ring 45. After one-color injection molding, two through holes 122 opposite to the one-color raised portions 2622 are formed on the first plastic ring 12. For the convenience of explanation, the two one-color guide members 262 provided with the one-color glue feed channel 271 are respectively named as the first one-color guide member and the second one-color guide member, and the remaining two one-color guide members 262 are respectively named as the third one-color guide member and the fourth one-color guide member in counterclockwise order. The first one-color guide member and the third one-color guide member are respectively provided with one-color raised portions 2622, and the two one-color raised portions 2622 are respectively arranged on the left and right sides of the one-color glue feed channel 271.

[0056] Each color main slider 261 is provided with an oblique slide groove 2611 on both sides, and the oblique slide groove 2611 is parallel to the color oblique guide rod 263. The color slider assembly 26 also includes two color side sliders 29, which are respectively provided on both sides of the color main slider 261. The color side slider 29 is provided with an oblique protrusion 291, and the oblique protrusion 291 is connected with the oblique slide groove 2611. The upper part of the color side slider 29 is fixedly connected with the color front template 21. When the mold is opened, the color front template 21 drives the color side slider 29 to move synchronously, so that the color side slider 29 can drive the color main slider 261 to move along the vertical mold opening direction.

[0057] Combination Figures 7 to 10 , the one-color front positioning member 25 is provided with a one-color positioning protrusion 251 and four one-color elastic push blocks 252. The one-color positioning protrusion 251 is arranged on the side of the one-color front positioning member 25 facing the positioning seat 43, and the one-color positioning protrusion 251 is matched with the positioning groove 432 on the end face of the positioning seat 43. The one-color elastic push block 252 penetrates the one-color front positioning member 25 along the mold opening direction, and the four one-color elastic push blocks 252 are respectively arranged around the one-color positioning protrusion 251. The one-color elastic push block 252 includes a push block and an elastic member arranged on the upper part of the push block, and the elastic member elastically abuts between the push block and the one-color front template 21. When the mold is opened, under the action of the elastic member, the push block protrudes downward from the lower surface of the one-color front positioning member 25 and abuts against the positioning seat 43 and the positioning ring 45, so as to apply a downward force to the positioning seat 43 and the positioning ring 45 to prevent the positioning ring 45 from rising with the one-color front positioning member 25.

[0058] Combination Figures 11 to 14The two-color front mold 3 includes a two-color front mold plate 31, a two-color front ejector plate 32, a two-color front mold base 33 and a two-color front top plate 34 from bottom to top. The two-color front top plate 34 is provided with a two-color glue inlet 311. The two-color front mold 3 is also provided with a two-color flow channel. One end of the two-color flow channel is connected to the two-color glue inlet 311, and the other end of the two-color flow channel passes through the two-color front mold base 33, the two-color front ejector plate 32 and the two-color front mold plate 31 and extends to the two-color mold cavity 364. Two two-color injection upper stations are provided on the two-color front top plate 34, and the two-color injection upper stations correspond to the injection lower stations.

[0059] The upper station of the two-color injection molding is provided with a two-color front positioning member 35 and four two-color slider assemblies 36. The two-color front positioning member 35 is connected with the positioning seat 43. The two-color slider assembly 36 includes a two-color main slider 361, a two-color slider 362 and a two-color oblique guide rod 363. The two-color main slider 361 is fixedly connected with the two-color slider 362. The two-color slider 362 is arranged on the rear positioning kit 44. The two-color slider 362 is set as a quarter arc block. The four two-color sliders 362 are surrounded by a circle and arranged on the outer periphery of the positioning ring 45. A two-color mold cavity 364 is formed between the positioning ring 45, the two-color front positioning member 35 and the four two-color sliders 362. The semi-finished workpiece 10 molded by the one-color injection molding is partially located in the two-color mold cavity 364. A two-color glue feed channel 365 is arranged between two adjacent two-color sliding parts 362, and two two-color glue feed channels 365 are arranged between four two-color sliding parts 362. The two two-color glue feed channels 365 are arranged on both sides of the positioning ring 45. The first end of the two-color glue feed channel 365 is connected to the two-color flow channel, and the second end of the two-color glue feed channel 365 is connected to the through hole 122 on the semi-finished workpiece 10, that is, the two-color glue feed channel 365 is connected to the two-color mold cavity 364 by passing through.

[0060] The two-color main slider 361 is slidably connected to the two-color oblique guide rod 363, and the two-color oblique guide rod 363 can drive the two-color main slider 361 to move along the vertical mold opening direction. The connection structure between the two-color oblique guide rod 363 and the two-color main slider 361 is the same as the connection structure between the one-color main slider 261 and the one-color oblique guide rod 263, and will not be repeated here. Two-color side sliders are respectively arranged on both sides of the two-color main slider 361, and the structure of the two-color side sliders is similar to that of the one-color side sliders, and will not be repeated here.

[0061] exist Figure 5 In the embodiment, the rear mold 4 is further provided with four locking members 46, which are arranged around the positioning seat 43, and the four locking members 46 are respectively arranged corresponding to the four one-color main sliders 261, or the four locking members 46 are respectively arranged corresponding to the four two-color main sliders 361. The locking member 46 includes a first locking arm 461 and a second locking arm 462 which are perpendicular to each other, the first locking arm 461 extends outward along the vertical mold opening direction, the second locking arm 462 extends along the mold opening direction, and the second locking arm 462 passes through the rear mold plate 42 and is fixedly connected to the rear mold bottom plate 41.

[0062] A single-color locking slider 2612 is provided at one end of the single-color main slider 261 facing the rear mold 4, and a single-color locking hole 2613 is provided between the single-color locking slider 2612 and the single-color main slider 261. The first locking arm 461 is inserted into the single-color locking hole 2613 and can slide along the vertical mold opening direction to realize the detachable connection between the first locking arm 461 and the single-color locking hole 2613.

[0063] One end of the two-color main slider 361 facing the rear mold 4 is provided with a two-color locking hole that cooperates with the first locking arm 461. The specific structure and position are similar to those of the one-color locking hole 2613 and will not be repeated here. The first locking arm 461 is inserted into the two-color locking hole and can slide along the vertical mold opening direction to realize the detachable connection between the first locking arm 461 and the two-color locking hole.

[0064] Combination Fig.15 and Fig.16 The two-color front positioning member 35 includes a first positioning block 351, a second positioning block 352 and four two-color elastic push blocks 354. A mounting hole is provided in the middle of the first positioning block 351, and a convex ring portion 3511 is provided on the outer periphery of one end of the mounting hole facing the positioning seat 43. The second positioning block 352 is arranged in the mounting hole 121, and the second positioning block 352 protrudes out of the mounting hole toward one end of the positioning seat 43. An annular groove 353 is formed between the end of the second positioning block 352 and the convex ring portion 3511, and the annular groove 353 extends along the circumference of the mounting hole 121. The annular groove 353 is connected with the two-color mold cavity 364 and becomes a part of the two-color mold cavity 364. A two-color positioning protrusion 3521 is also provided at one end of the second positioning block 352 facing the positioning seat 43, and the two-color positioning protrusion 3521 is matched with the positioning groove 432 at the end of the positioning seat 43 in a concave-convex manner. Four two-color elastic push blocks 354 are respectively arranged around the two-color positioning protrusion 3521, and the two-color elastic push blocks 354 penetrate the second positioning block 352 along the mold opening direction. The two-color elastic push blocks 354 can protrude from the bottom wall of the second positioning block 352 and abut against the positioning seat 43 and the positioning ring 45, so as to apply a downward force to the positioning seat 43 and the positioning ring 45. The structure of the two-color elastic push blocks 354 is similar to that of the one-color elastic push blocks 252, and will not be described in detail here.

[0065] Injection molding method embodiment

[0066] The present invention also provides an injection molding method, comprising the double-color injection mold as described in the above embodiment, the injection molding method comprising the following steps:

[0067] The annular mesh cloth is placed on the positioning ring so that the two ends of the positioning ring protrude from the ends of the annular mesh cloth respectively;

[0068] Putting a positioning ring with an annular mesh cloth on the positioning seat of the rear mold;

[0069] The one-color front mold and the rear mold are combined and one-color injection molding is performed to obtain a semi-finished workpiece sleeved on the positioning ring, wherein the semi-finished workpiece includes a first plastic ring and a second plastic ring fixedly connected to the axial ends of the annular mesh cloth, and a through hole is opened on the first plastic ring, and the through hole penetrates the first plastic ring along the radial direction of the positioning ring;

[0070] The one-color front mold and the back mold are opened, and the back mold is rotated by a preset angle so that the back mold corresponds to the two-color front mold. In this embodiment, the preset angle is 180°.

[0071] The rear mold is combined with the two-color front mold and two-color injection molding is performed to obtain a finished workpiece sleeved on the positioning ring, wherein the glue inlet flow channel of the two-color front mold passes through the through hole and extends into the interior of the first plastic ring, so that a third plastic ring is injection molded inside the first plastic ring, and the third plastic ring is fixedly connected to the first plastic ring;

[0072] The rear mold and the two-color front mold are opened, and the finished workpiece and the positioning ring are taken out and separated.

[0073] Preferably, before the rear mold and the two-color front mold are molded together, a magnet is placed in the first plastic ring. Specifically, two mounting holes are opened on the inner side of the first plastic ring, and the two mounting holes are preferably arranged symmetrically along the center line of the first plastic ring, and the magnet is arranged in the mounting holes. After two-color injection molding, the magnet is fixed between the first plastic ring and the third plastic ring, and the end of the magnet is preferably exposed to the outside, so as to facilitate magnetic connection with the connecting component of the vacuum cleaner.

[0074] In summary, it can be seen that the present invention sets a positioning ring to support the annular mesh cloth from the inside to the outside to prevent the annular mesh cloth from arbitrary deformation; the present invention fixes the annular mesh cloth and the positioning ring together on the positioning seat of the rear mold, and then surrounds the outer periphery of the positioning ring through four one-color sliding parts, and with the cooperation of the rear positioning kit and the one-color front positioning parts, two one-color mold cavities are formed on the outer periphery of the positioning ring, and the annular mesh cloth extends into the one-color mold cavity. After one-color injection molding, two one-color plastic rings are formed at both ends of the annular mesh cloth at one time, and the annular mesh cloth is tightly connected to the plastic part to prevent the two from separating; compared with the prior art, the present invention has the advantages of high production efficiency and high product qualification.

[0075] Finally, it needs to be emphasized that the foregoing is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A two-color injection mold, comprising a one-color front mold, a two-color front mold and a rear mold, wherein the rear mold is sequentially connected with the one-color front mold and the two-color front mold, characterized in that: The rear mold is provided with a positioning seat, a rear positioning kit and a positioning ring, the rear positioning kit is sleeved on the axial middle part of the positioning seat, one end of the positioning seat protrudes from the surface of the rear positioning kit, the positioning ring is detachably sleeved on the positioning seat, and the outer side of the positioning ring is detachably sleeved with an annular mesh cloth; The one-color front mold is provided with a one-color front positioning piece and four one-color sliding position components, the one-color front positioning piece is matched and connected with the positioning seat, the one-color sliding position component includes a one-color main slider, a one-color sliding position piece and a one-color inclined guide rod, the one-color main slider is fixedly connected with the one-color sliding position piece, the one-color sliding position piece is arranged on the rear positioning kit, the four one-color sliding position pieces are surrounded by the outer periphery of the positioning ring, and two one-color molds are formed between the rear positioning kit, the positioning ring, the one-color front positioning piece and the four one-color sliding position pieces Cavity, the two single-color mold cavities are respectively located at the two ends of the axial direction of the annular mesh cloth, and the two single-color mold cavities are not connected to each other, the ends of the annular mesh cloth respectively extend into the corresponding single-color mold cavities, wherein two single-color glue feed channels are arranged between two adjacent single-color sliding members, the two single-color glue feed channels are respectively connected with the two single-color mold cavities, the single-color main slider is slidably connected with the single-color oblique guide rod, and the single-color oblique guide rod can drive the single-color main slider and the single-color sliding member to move along the vertical mold opening direction.

2. The two-color injection mold according to claim 1, characterized in that: The two axial ends of the positioning ring protrude from the ends of the annular mesh cloth respectively; The one-color positioning member is provided with two arc-shaped flanges protruding on one side toward the one-color mold cavity. The two arc-shaped flanges are arranged along the axial direction of the positioning ring. The arc-shaped flanges press the annular mesh cloth toward the outer peripheral wall of the positioning ring.

3. The two-color injection mold according to claim 2, characterized in that: The two opposite one-color positioning members are respectively provided with a one-color protrusion, the two one-color protrusions are arranged opposite to each other, and both of the two one-color protrusions extend into the same one-color mold cavity and abut against the outer peripheral wall of the positioning ring.

4. The two-color injection mold according to claim 1, characterized in that: Both sides of the main sliding block of one color are respectively provided with oblique sliding grooves, and the oblique sliding grooves are parallel to the oblique guide rod of one color; The one-color position assembly also includes two one-color side sliders, which are respectively arranged on both sides of the one-color main slider. The one-color side slider is provided with an inclined protrusion, which is cooperatively connected with the inclined slide groove. The one-color side slider can drive the one-color main slider to move along the vertical mold opening direction.

5. The two-color injection mold according to claim 1, characterized in that: The single-color front positioning piece is provided with a single-color positioning protrusion and a plurality of single-color elastic push blocks, the single-color positioning protrusion is arranged on the side of the single-color front positioning piece facing the positioning seat, the single-color positioning protrusion is matched with the positioning seat, the single-color elastic push block penetrates the single-color front positioning piece along the mold opening direction, the plurality of single-color elastic push blocks are respectively arranged around the single-color positioning protrusion, and the single-color elastic push block can protrude from the surface of the single-color front positioning piece and abut against the positioning seat and the positioning ring.

6. The two-color injection mold according to claim 1, characterized in that: The two-color front mold is provided with a two-color front positioning piece and four two-color sliding components, the two-color front positioning piece is cooperatively connected with the positioning seat, the two-color sliding component includes a two-color main slider, a two-color sliding piece and a two-color oblique guide rod, the two-color main slider is fixedly connected with the two-color sliding piece, the four two-color sliding pieces are surrounded by the outer periphery of the positioning ring, a two-color mold cavity is formed between the positioning ring, the two-color front positioning piece and the four two-color sliding pieces, a two-color glue feed channel is provided between two adjacent two-color sliding pieces, the two-color glue feed channel is communicated with the two-color mold cavity, the two-color main slider is slidably connected with the two-color oblique guide rod, and the two-color oblique guide rod can drive the two-color main slider to move along the vertical mold opening direction.

7. The two-color injection mold according to claim 6, characterized in that: The rear mold is also provided with four locking pieces, which are arranged around the positioning seat, and the locking pieces are provided with locking arms, which extend outwards along a direction perpendicular to the mold opening direction; A one-color locking slider is disposed at one end of the one-color main slider facing the rear mold, a one-color locking hole is disposed between the one-color locking slider and the one-color main slider, and the locking arm is detachably connected to the one-color locking hole; A two-color locking slider is arranged at one end of the two-color main slider facing the rear mold, a two-color locking hole is arranged between the two-color locking slider and the two-color main slider, and the locking arm is detachably connected to the two-color locking hole.

8. The two-color injection mold according to claim 6, characterized in that: The two-color front positioning member includes a first positioning block, a second positioning block and a plurality of two-color elastic push blocks, a mounting hole is formed through the middle of the first positioning block, a convex ring portion is provided on the outer periphery of one end of the mounting hole facing the positioning seat, the second positioning block is arranged in the mounting hole, and the second positioning block protrudes out of the mounting hole at one end facing the positioning seat, an annular groove is formed between the second positioning block and the convex ring portion, and the annular groove is communicated with the two-color mold cavity; The second positioning block is also provided with a two-color positioning protrusion at one end facing the positioning seat, and the two-color positioning protrusion is matched with the positioning seat in a concave-convex manner; The plurality of two-color elastic push blocks are respectively arranged around the two-color positioning protrusion, and the two-color elastic push blocks can protrude from the surface of the second positioning block and abut against the positioning seat and the positioning ring.

9. Injection molding method, characterized in that: The double-color injection mold according to any one of claims 1 to 8 above, wherein the injection molding method comprises the following steps: Sleeve the annular mesh cloth onto the positioning ring so that both ends of the positioning ring protrude from the ends of the annular mesh cloth; Sleeve the positioning ring covered with an annular mesh cloth on the positioning seat of the rear mold; The one-color front mold and the rear mold are combined and one-color injection molding is performed to obtain a semi-finished workpiece sleeved on the positioning ring, wherein the semi-finished workpiece includes a first plastic ring and a second plastic ring fixedly connected to the two axial ends of the annular mesh cloth, and the first plastic ring is provided with a through hole, and the through hole penetrates the first plastic ring along the radial direction of the positioning ring; The one-color front mold and the rear mold are opened, and the rear mold and the two-color front mold are closed to perform two-color injection molding to obtain a finished workpiece sleeved on the positioning ring, wherein the glue inlet channel of the two-color front mold passes through the through hole and extends into the interior of the first plastic ring, so that a third plastic ring is injection-molded inside the first plastic ring, and the third plastic ring is fixedly connected to the first plastic ring; The rear mold and the two-color front mold are opened, and the finished workpiece and the positioning ring are taken out and separated.

10. The injection molding method according to any one of claims 9, characterized in that ; Before the rear mold and the two-color front mold are molded together, two magnets are placed on the first plastic ring, wherein two mounting holes are provided on the inner side of the first plastic ring, the two mounting holes are arranged opposite to each other, and the magnets are arranged in the mounting holes; After two-color injection molding, the magnet is fixed between the first plastic ring and the third plastic ring.

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