An extrusion molding vulcanization die and method

Abstract

The present invention belongs to the technical field of the manufacture of casting polyurethane rubber molds, and particularly relates to an extrusion molding vulcanization mold and method. The present invention includes a support rod, a guide rod, a support plate, an extrusion bolt, a deep groove ball bearing, a locking nut, a cover plate, a connecting plate, a limiting rod, a cavity plate, a turntable and a fixing mechanism; the cavity plate is placed on the turntable; the limiting rod is vertically fixed on the upper surface of the cavity plate; the support plate is connected to the upper surface of the cavity plate through the support rod; the lower end of the extrusion bolt passes through the center of the support plate and is vertically fixed on the connecting plate through the fixing mechanism; the upper end of the guide rod is fixed to the support plate, and the lower end of the guide rod passes through the connecting plate and extends outwards. The structure and operation of the present invention are simple, making the diversion cover have no riser marks and being simple to process.

Description

Technical Field

[0001] The present invention belongs to the technical field of manufacturing of casting polyurethane rubber molds, and particularly relates to an extrusion molding vulcanization mold and method. Background Art

[0002] The acoustic array is a key component of a certain product. The vulcanization linear shape and surface roughness of the fairing of the acoustic array directly affect the flow noise of the product underwater. The vulcanization of the acoustic array has developed from the past of adhering a vulcanized rubber block and a shell after matching and polishing to the CPU casting molding. The advantage of casting molding is that the pressure on the product is small, only affected by the self-weight of the glue solution. The disadvantage is that there is a casting gate on the front surface of the molded product, and obvious riser marks remain after cleaning, and the local surface roughness is high.

[0003] In order to eliminate the riser marks on the vulcanized surface of the fairing and improve the surface quality of the fairing, it is necessary to improve the CPU casting molding method. The extrusion molding can eliminate the casting gate marks on the front end face of the product.

[0004] Extrusion molding is to pour the prepared glue solution into the lower die cavity of the mold, combine the upper die and the lower die, put them into the flat plate of the press, heat and apply pressure for a certain time, and then demold. The elements in the acoustic array are pressure-sensitive components and cannot withstand the high temperature (120°C) and high pressure (7 - 12 MPa) used in the press molding.

[0005] The front end of the product structure form is a large plane, there are many concave and convex points on the side, and the glue layer thickness changes greatly. During the vertical extrusion process, air entrapment is extremely likely to occur, resulting in defects.

[0006] The advantages of the extrusion molding method adopted in the prior art are that the product has no riser marks and only has slight flash marks on the parting line. The disadvantages are that the mold structure design is complex, the operation and processing are difficult, and over-extrusion is likely to occur during extrusion molding. Summary of the Invention

[0007] The present invention provides an extrusion molding vulcanization mold and method, aiming to provide a vulcanization mold without riser marks, with a simple structure and operation, and easy to process.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

[0009] An extrusion molding vulcanization mold, comprising a support rod, a guide rod, a support plate, an extrusion bolt, a deep groove ball bearing, a locking nut, a cover plate, a connecting plate, a limiting rod, a cavity plate, a turntable and a fixing mechanism; the cavity plate is placed on the turntable; at least two limiting rods are vertically and evenly fixed on the upper surface of the cavity plate; the support plate is connected to the cavity plate through at least two support rods arranged evenly, and the support rods are arranged outside the limiting rods; the lower end of the extrusion bolt passes through the center of the support plate, the cover plate is sleeved on the lower part of the extrusion bolt, and the lower end of the extrusion bolt is connected to the connecting plate through a deep groove ball bearing and fastened by the extrusion bolt; the connecting plate is arranged below the support plate; at least two guide rods are evenly arranged, and the upper ends of the guide rods are fixed to the support plate, and the lower ends of the guide rods pass through the connecting plate.

[0010] The cavity plate is of a concave-shaped structure; there is a horizontally extending outer eaves on the outer periphery of the top cavity of the concave shape, and an annular glue overflow groove is opened at the junction of the side wall of the cavity plate and the outer eaves; the inner side wall of the cavity plate is a cavity curved surface matching the shell to be vulcanized; a plurality of one-word grooves are evenly arranged along the inner edge of the upper end surface of the cavity plate, and the inner cavity of the cavity plate is communicated with the annular glue overflow groove through the one-word grooves; three groups of holes are arranged in a circular array on the outer eaves surface, and each group of holes includes a first positioning hole for the support rod and a mounting hole for the limiting rod, and the centers of the first positioning holes in each group, the centers of the mounting holes for the limiting rod and the center of the cavity plate are collinear.

[0011] The support rod is of a one-word stepped structure; the middle of the support rod is a first cylinder, and an annular milled flat step is arranged along the circumference of the first cylinder; the two ends of the first cylinder are respectively a first cylinder rod and a support plate positioning cylinder rod, the end of the support plate positioning cylinder rod is provided with a support plate fixing thread, and the end of the first cylinder rod is provided with a first thread.

[0012] The support plate is disc-shaped, a first threaded hole for the extrusion bolt to pass through is opened in the center of the support plate, and multiple groups of support rod second positioning holes for connecting the support rods and guide rod first positioning holes for connecting the guide rods are arranged in a circular array on the plate surface of the support plate; the centers of the support rod second positioning holes in each group and the centers of the guide rod first positioning holes are collinear with the center of the first threaded hole.

[0013] The connecting plate is of a concave-shaped disc structure; a circular counterbore for connecting the deep groove spherical bearing to give way is opened in the center of the connecting plate; a plurality of second threaded holes for fixing the cover plate and the connecting plate, a plurality of guide rod sliding and positioning holes and a plurality of through holes are symmetrically arranged in sequence outward with the circular counterbore as the center; a plurality of circular holes for fixing the deep groove spherical bearing are evenly arranged at the bottom of the circular counterbore.

[0014] The middle part of the extrusion bolt is a cylinder, and the outer circumference of the cylinder is provided with extrusion bolt threads; one end of the cylinder is a cylindrical first smooth rod, and the end of the first smooth rod is provided with a second thread; the other end of the cylinder is a square boss, and a square groove with a size of 10mm×10mm and a depth of 15mm is opened at the center of the boss.

[0015] The cover plate is a circular plate, and a second through hole for the extrusion bolt to pass through is opened at the center of the cover plate. A plurality of first through holes for fixing with the connecting plate are arranged in a circular array on the plate surface of the cover plate.

[0016] The guide rod is an integral structure composed of a second smooth rod and a cylindrical platform. The cylindrical platform is horizontally arranged at one end of the second smooth rod, and a third threaded hole is opened at the other end of the second smooth rod. A third screw for preventing the connecting plate from disengaging from the guide rod is connected to the third threaded hole.

[0017] The limiting rod is an integral structure composed of a second cylindrical rod and a third cylindrical rod; the outer diameter and length of the second cylindrical rod are both larger than those of the third cylindrical rod; the locking nut is a circular ring structure; two concave card slots are symmetrically opened on the outer edge of the ring surface, and the central connection line of the two concave card slots passes through the center of the ring; a countersunk head screw hole is also opened on the ring surface, and the central connection line of the countersunk head screw hole and the center of the ring is perpendicular to the central connection line of the two concave card slots; the inner side wall of the locking nut is provided with locking threads; an opening groove is opened on the outer side wall of the locking nut, and the axis of the opening groove is perpendicular to the side wall.

[0018] A method for using an extrusion molding vulcanization mold includes the following steps

[0019] Step 1: Fix the shell to be vulcanized on the connecting plate; pass the support plate through the support rod and fix it; place the mold cavity plate on the turntable fixing groove.

[0020] Step 2: Rotate the turntable to a preset angle to tilt the mold cavity plate, pour glue into the mold cavity plate, and rotate the extrusion bolt to gradually make the shell to be vulcanized enter the mold cavity plate and immerse in the glue.

[0021] Step 3: When the lower end face of the shell to be vulcanized is completely immersed in the glue, rotate the turntable to the horizontal position, and continue to rotate the extrusion bolt until the connecting plate touches the limiting rod.

[0022] Step 4: After the shell to be vulcanized is completely clamped with the mold cavity plate, move it into the oven, heat for a preset time and then demold, and clean the parting line and overflow glue groove.

[0023] Beneficial effects:

[0024] (1) The present invention eliminates the thickness difference at the concave and convex points by stepwise vulcanization, and at the same time designs a turntable so that the front end face of the product enters the glue solution obliquely during mold closing, avoiding air entrapment caused by the large flat surface falling vertically into the glue solution.

[0025] (2) The present invention provides a vulcanization mold without gate marks by gradually reducing the inclination angle of the mold as the position of the front end face of the product enters the glue solution changes, until the mold is completely closed, then moving it into an oven, heating for a certain period of time and then demolding, and cleaning the parting line and overflow groove.

[0026] (3) The structure of the present invention is simply designed, with low operation and processing difficulty, and over-extrusion is prevented during extrusion molding.

[0027] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following takes the preferred embodiments of the present invention as an example and details as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 is a schematic structural diagram of the present invention;

[0030] Figure 2 is a cross-sectional view of the cavity plate structure of the present invention;

[0031] Figure 3 is a top view of the cavity plate of the present invention;

[0032] Figure 4 is a schematic structural diagram of the support rod of the present invention;

[0033] Figure 5 is a cross-sectional view of the support plate structure of the present invention;

[0034] Figure 6 is a top view of the support plate structure of the present invention;

[0035] Figure 7 is a cross-sectional view of the connecting plate of the present invention;

[0036] Figure 8 is a top view of the connecting plate structure of the present invention;

[0037] Figure 9 is a front view of the extrusion bolt structure of the present invention;

[0038] Figure 10 It is the top view of the extrusion bolt structure of the present invention;

[0039] Figure 11 It is the cross-sectional view of the cover plate structure of the present invention;

[0040] Figure 12 It is the top view of the cover plate structure of the present invention;

[0041] Figure 13 It is the schematic diagram of the guide rod structure of the present invention;

[0042] Figure 14 It is the schematic diagram of the limit rod structure of the present invention;

[0043] Figure 15 It is the schematic diagram of the locking nut structure of the present invention;

[0044] Figure 16 It is the left cross-sectional view of the locking nut of the present invention.

[0045] In the figure: 1 - first nut; 2 - support rod; 3 - guide rod; 4 - support plate; 5 - extrusion bolt; 6 - first screw; 7 - countersunk head screw; 8 - deep groove ball bearing; 9 - locking nut; 10 - cover plate; 11 - second screw; 12 - connecting plate; 13 - third screw; 14 - limit rod; 15 - mold cavity plate; 16 - second nut; 17 - turntable; 18 - cavity curved surface; 19 - slotted head; 20 - overflow groove; 21 - first positioning hole of the support rod; 22 - installation hole of the limit rod; 23 - fixing thread of the support plate; 24 - positioning cylindrical rod of the support plate; 25 - first cylinder; 26 - milled flat step; 27 - first cylindrical rod; 28 - first thread; 29 - second positioning hole of the support rod; 30 - first positioning hole of the guide rod; 31 - first threaded hole; 32 - through hole; 33 - sliding and positioning hole of the guide rod; 34 - second threaded hole; 35 - counterbore; 36 - circular hole; 37 - groove; 38 - boss; 39 - thread of the extrusion bolt; 40 - first smooth rod; 41 - second thread; 42 - first through hole; 43 - second through hole; 44 - cylindrical platform; 45 - second smooth rod; 46 - third threaded hole; 47 - second cylinder; 48 - third cylindrical rod; 49 - countersunk head screw hole; 50 - locking thread; 51 - concave card slot; 52 - open slot; 53 - shell to be vulcanized; 54 - outer eaves.

[0046] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following takes the preferred embodiment of the present invention and details it as follows. Detailed implementation manners

[0047] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work belong to the scope of protection of the present invention.

[0048] Embodiment 1:

[0049] Referring to Figures 1-16 An extrusion molding vulcanization mold shown in the figure, including a support rod 2, a guide rod 3, a support plate 4, an extrusion bolt 5, a deep groove ball bearing 8, a locking nut 9, a cover plate 10, a connecting plate 12, a limiting rod 14, a cavity plate 15, a turntable 17 and a fixing mechanism; the cavity plate 15 is placed on the turntable 17; at least two limiting rods 14 are vertically and evenly fixed on the upper surface of the cavity plate 15; the support plate 4 is connected to the cavity plate 15 through at least two support rods 2 arranged evenly, and the support rods 2 are arranged outside the limiting rods 14; the lower end of the extrusion bolt 5 passes through the center of the support plate 4, the cover plate 10 is sleeved on the lower part of the extrusion bolt 5, and the lower end of the extrusion bolt 5 is connected to the connecting plate 12 through a deep groove ball bearing 8 and fastened by the extrusion bolt 5; the connecting plate 12 is arranged below the support plate 4; at least two guide rods 3 are evenly arranged and their upper ends are fixed to the support plate 4, and the lower ends of the guide rods 3 pass through the connecting plate 12.

[0050] Before extrusion, the support rod 2 and the limiting rod 14 are fixed on the cavity plate 15; the extrusion bolt 5 is screwed on the support plate 4, the cover plate 10 is sleeved on the extrusion bolt 5, a deep groove ball bearing 8 is installed at the front end of the extrusion bolt 5 and fixed with a locking nut 9, and the locking nut 9 is tightened at the cut groove with a countersunk head screw 7, and the cover plate 10 and the connecting plate 12 are fixed together with a first screw 6. The guide rod 3 plays a guiding role, is fixed on the support plate 4, passes through the connecting plate 12, and makes the connecting plate 12 move along the guide rod 3.

[0051] In order to prevent the connecting plate from disengaging from the guide rod 3, a third screw 13 can also be used to fix the front end of the guide rod 3.

[0052] The to-be-vulcanized shell 53 is fixed on the connecting plate 12 with a second screw 11, and the second screw 11 passes through the connecting plate 12 to fix the to-be-vulcanized shell 53; the support plate 4 is passed through the support rod 2 and fixed with a first nut 1; the cavity plate 15 is placed in the fixing groove provided on the turntable 17, the turntable is rotated to a certain angle to make the cavity plate 15 inclined, glue is poured into the cavity, the extrusion bolt 5 is rotated, so that the to-be-vulcanized shell 53 gradually enters the cavity plate 15 and is immersed in the glue, when the lower end surface of the to-be-vulcanized shell is completely immersed in the glue, the turntable 17 is rotated to the horizontal, and the extrusion bolt 5 is continuously rotated until the connecting plate 12 touches the limiting rod 14.

[0053] The positioning clearance between the support plate 4 and the support rod 2 is a transitional fit, and the limit clearance is 0.07 mm. The cavity plate 15 is connected to the support plate 4 by tightening the first nut 1, the support rod 2, and the second nut 16. The support rod 2 plays a supporting role and at the same time makes the cavities of the support plate 4 and the cavity plate 15 concentric. The connecting plate 12 and the support plate 4 achieve concentric positioning through the guide rod 3. The limit rod 14 plays a limiting and protective role to prevent overextrusion and damage to the mold and the shell 53 to be vulcanized.

[0054] The present invention uses step-by-step vulcanization to eliminate the thickness difference at the concave and convex points. At the same time, a turntable is designed so that the front end face of the product enters the glue solution obliquely during mold closing, avoiding the problem of air entrapment caused by the large plane falling vertically into the glue solution. In the present invention, the inclination angle of the mold gradually decreases as the position of the front end face of the product enters the glue solution, until the mold is completely closed, then it is moved into an oven, heated for a certain period of time and then demolded, and the parting line and the overflow groove are cleaned to provide a vulcanization mold without gate marks. The structure design of the present invention is simple, the operation and processing difficulty are small, and overextrusion is prevented during extrusion molding.

[0055] Embodiment 2:

[0056] Referring to Figure 1 、 Figure 2 and Figure 3 An extrusion molding vulcanization mold shown, on the basis of Embodiment 1, the cavity plate 15 has a concave-shaped structure; a horizontally extending outer eaves 54 is provided on the outer periphery of the cavity at the top of the concave shape, and an annular overflow groove 20 is opened at the junction of the side wall of the cavity plate 15 and the outer eaves 54; the inner side wall of the cavity plate 15 is a cavity curved surface 18 matching the shell 53 to be vulcanized; a plurality of one-word grooves 19 are uniformly arranged along the inner edge of the upper end face of the cavity plate 15, and the inner cavity of the cavity plate 15 is communicated with the annular overflow groove 20 through the one-word grooves 19; three groups of holes are arranged in a circular array on the surface of the outer eaves 54, and each group of holes includes a first positioning hole 21 for the support rod and a mounting hole 22 for the limit rod. The centers of the first positioning holes 21 for the support rod, the centers of the mounting holes 22 for the limit rod and the center of the cavity plate 15 in each group are collinear.

[0057] In this embodiment, an annular overflow groove 20 is opened at the junction of the side wall of the cavity plate 15 and the outer eaves 54; eight one-word grooves 19 are uniformly arranged along the inner edge of the upper end face of the cavity plate 15, and the inner cavity of the cavity plate 15 is communicated with the annular overflow groove 20 through the one-word grooves 19; three groups of first positioning holes 21 for the support rod and three mounting holes 22 for the limit rod are arranged in a circular array on the surface of the outer eaves 54. The centers of the first positioning holes 21 for the support rod, the centers of the mounting holes 22 for the limit rod and the center of the cavity plate 15 in each group are collinear.

[0058] In actual use, align the first cylindrical rod 27 of the support rod 4 and insert it into the three first positioning holes 21 of the support rod, and use the second nut 16 to connect the first thread 28 of the support rod 2. Align the third cylindrical rod 48 of the limit rod 14 and insert it into the three limit rod mounting holes 22, and the limit rods are of equal height. Finally, fix the support plate 4 with the guide rod 3, the extrusion bolt 5, the first screw 6, the countersunk head screw 7, the deep groove ball bearing 8, the locking nut 9, the cover plate 10, the second screw 11, the connecting plate 12, and the third screw 13 installed on the support rod 2.

[0059] Embodiment Three:

[0060] Referring to Figure 1 and Figure 4 a kind of extrusion molding vulcanization mold shown, on the basis of Embodiment One, the support rod 2 is of a one - shaped stepped structure; the middle of the support rod 2 is the first cylinder 25, and a circumferential annular milled flat step 26 is arranged on the first cylinder 25; the two ends of the first cylinder 25 are respectively the first cylindrical rod 27 and the support plate positioning cylindrical rod 24, the end of the support plate positioning cylindrical rod 24 is provided with a support plate fixing thread 23, and the end of the first cylindrical rod 27 is provided with a first thread 28.

[0061] In actual use, the diameter of the first cylinder 25 is larger than the first positioning hole 21 of the support rod and the second positioning hole 29 of the support plate 4 on the support rod, playing a role in fixing and supporting to ensure the stability when the extrusion bolt 5 presses downward.

[0062] At both ends of the first cylinder 25 are the first cylindrical rod 27 and the support plate positioning cylindrical rod 24 with a smaller outer diameter. During assembly, insert the end of the first cylindrical rod 27 of the support rod 2 into the first positioning hole 21 of the cavity plate 15, and use the second nut 16 to connect the first thread 28 of the support rod 2 to fix the support rod 2 on the cavity plate 15.

[0063] The support rod 2 is respectively connected to the first positioning hole 21 of the cavity plate 15 and the second positioning hole 29 of the support plate 4, playing a role in guiding and positioning. At the front ends of the first cylindrical rod 27 and the support plate positioning cylindrical rod 24 are the support plate fixing thread 23 and the first thread 28, which are connected to the first nut 1 and the second nut 16 to play a locking role.

[0064] Embodiment Four:

[0065] Referring to Figure 1 、 Figure 5 and Figure 6An extrusion molding vulcanization mold as shown. On the basis of Embodiment 1, the support plate 4 is disc-shaped. A first threaded hole 31 for the extrusion bolt 5 to pass through is provided at the center of the support plate 4. A plurality of second positioning holes 29 for connecting the support rods 2 and first positioning holes 30 for connecting the guide rods 3 are arranged in a circular array on the surface of the support plate 4; the centers of each group of second positioning holes 29 for the support rods and the centers of the first positioning holes 30 for the guide rods are collinear with the center of the first threaded hole 31.

[0066] During actual use, the first threaded hole 31 in the middle of the support plate is used for the installation of the extrusion bolt thread 39. Three first positioning holes 30 for the guide rods are distributed around the first threaded hole 31 for fixing the guide rod 3.

[0067] Embodiment 5:

[0068] Refer to Figure 1 、 Figure 7 and Figure 8 An extrusion molding vulcanization mold as shown. On the basis of Embodiment 1: The connecting plate 12 is a concave-shaped disc structure; a circular counterbore 35 for the deep groove spherical bearing 8 to give way is provided at the center of the connecting plate 12; a plurality of second threaded holes 34 for fixing the cover plate 10 and the connecting plate 12, a plurality of guide rod sliding fit positioning holes 33 and a plurality of through holes 32 are symmetrically arranged in sequence outward with the circular counterbore 35 as the center; a plurality of circular holes 36 for fixing the deep groove spherical bearing 8 are uniformly arranged at the bottom of the circular counterbore 35.

[0069] During actual use, the connecting plate 12 plays a role of positioning, transferring and guiding. The circular counterbore 35 is used for the deep groove spherical bearing 8 to give way. In this embodiment, six second threaded holes 34 are evenly distributed around the circular counterbore 35 for the first screw 6 to fix the cover plate 10 and the connecting plate 12 together. Four circular holes 36 are distributed at the bottom of the circular counterbore 35 to facilitate the disassembly of the deep groove spherical bearing 8 during assembly and maintenance.

[0070] Embodiment 6:

[0071] Refer to Figure 1 、 Figure 9 and Figure 10 An extrusion molding vulcanization mold as shown. On the basis of Embodiment 1: The middle part of the extrusion bolt 5 is a cylinder, and an extrusion bolt thread 39 is arranged on the outer periphery of the cylinder; one end of the cylinder is a cylindrical first smooth rod 40, and a second thread 41 is provided at the end of the first smooth rod 40; the other end of the cylinder is a square boss 38, and a square groove 37 with a size of 10mm×10mm and a depth of 15mm is provided at the center of the boss 38.

[0072] In actual use, at the front end of the bolt is a cylindrical first smooth rod 40 for fixing the deep groove spherical bearing 8. At the front end of the cylindrical first smooth rod 40 is a second thread 41 for connecting the locking nut 9. At the other end of the extrusion bolt is a square boss 38, and a square groove 37 is opened at the center of the square boss 38 for installing the torque wrench joint. During extrusion, by setting the torque of the torque wrench, it is prevented that after the connecting plate 12 touches the limiting rod 14, excessive extrusion occurs. When demolding, a wrench can be used to clamp and rotate in the reverse direction of the square boss.

[0073] Embodiment Seven:

[0074] Referring to Figure 1 、 Figure 11 and Figure 12 A kind of extrusion molding vulcanization mold shown in

[0075] On the basis of Embodiment One: The cover plate 10 is a circular plate. A second through hole 43 for the extrusion bolt 5 to pass through is opened at the center of the cover plate 10. A plurality of first through holes 42 for fixing with the connecting plate 12 are arranged in a circular array on the plate surface of the cover plate 10.

[0076] In actual use, the structure of the cover plate 10 plays a role in protecting and pressing the deep groove ball bearing 8; the second through hole 43 is for the extrusion bolt thread 39 to give way; the first through hole 42 is connected to the second threaded hole 34 on the connecting plate 12 through the first screw 6 to connect the cover plate 10 and the connecting plate 12 together.

[0077] Embodiment Eight:

[0078] Referring to Figure 1 and Figure 13 A kind of extrusion molding vulcanization mold shown in

[0079] On the basis of Embodiment One: The guide rod 3 is an integral structure composed of a second smooth rod 45 and a cylindrical platform 44. The cylindrical platform 44 is horizontally arranged at one end of the second smooth rod 45. A third threaded hole 46 is opened at the other end of the second smooth rod 45, and a third screw 13 for preventing the connecting plate 12 from disengaging from the guide rod 3 is connected to the third threaded hole 46.

[0080] During actual use, the guide rod 3 plays a role in positioning and guiding. The third threaded hole 46 opened on the guide rod 3 is for the connection of the third screw 13. By tightening the third screw 13 for limit, it is prevented that the connecting plate 12 disengages from the guide rod 3 during the extrusion process.

[0081] Example Nine:

[0082] Refer to Figure 1 、 Figures 14-16 A kind of extrusion molding vulcanization mold shown in the figure. On the basis of Example One: The limiting rod 14 is an integral structure composed of a second cylindrical rod 47 and a third cylindrical rod 48; The outer diameter and length of the second cylindrical rod 47 are both larger than those of the third cylindrical rod 48; The locking nut 9 is of an annular structure; Two concave clamping grooves 51 are symmetrically opened on the outer edge of the annular surface, and the central connection line of the two concave clamping grooves 51 passes through the center of the ring; A countersunk screw hole 49 is also opened on the annular surface, and the connection line between the center of the countersunk screw hole 49 and the center of the ring is perpendicular to the central connection line of the two concave clamping grooves 51; The inner side wall of the locking nut 9 is provided with a locking thread 50; An opening groove 52 is opened on the outer peripheral side wall of the locking nut 9, and the axis of the opening groove 52 is perpendicular to the side wall.

[0083] During actual use, after the limiting rod 14 touches the connecting plate 12 during the extrusion process, it plays an extrusion limiting role. The third cylindrical rod 48 is press-fitted into the limiting rod positioning hole 22 on the cavity plate 15.

[0084] The locking nut 9 plays a positioning and pressing role on the deep groove ball bearing 8. After the deep groove ball bearing 8 is installed on the cylindrical first smooth rod 40 of the extrusion bolt 5, the locking nut 9 is connected to the second thread 41 of the extrusion bolt 5. Use a nut tightening tool to clamp on the two concave clamping grooves 51 on both sides of the locking nut 9, tighten the locking nut 9 and the extrusion bolt 5, and install the countersunk screw 7 at the countersunk screw hole 49 and tighten it, so that Figure 16 the opening groove 52 of the locking nut 9 is tightened and deformed to prevent the locking nut 9 from loosening.

[0085] Example Ten:

[0086] A method for using an extrusion molding vulcanization mold includes the following steps,

[0087] Step One: Fix the shell 53 to be vulcanized on the connecting plate 12; Fix the support plate 4 through the support rod 4; Place the cavity plate 15 on the fixing groove of the turntable 17;

[0088] Step Two: Rotate the turntable 17 to a preset angle to tilt the cavity plate 15, pour the rubber solution into the cavity plate 15, and rotate the extrusion bolt 5 to gradually make the shell 53 to be vulcanized enter the cavity plate 15 and immerse in the rubber solution;

[0089] Step Three: When the lower end surface of the shell 53 to be vulcanized is completely immersed in the rubber solution, rotate the turntable 17 to the horizontal, and continue to rotate the extrusion bolt 5 until the connecting plate 12 touches the limiting rod 14;

[0090] Step 4: After the housing 53 to be vulcanized is fully clamped to the cavity plate 15, move it into an oven, demold it after heating for a preset time, and clean the parting line and the overflow groove.

[0091] The present invention can be used as a polyurethane molding and vulcanizing mold for a sound array. It uses step-by-step vulcanization to eliminate the thickness difference at the concave and convex points. At the same time, a turntable is designed so that the front end face of the product enters the glue solution obliquely when the mold is closed, avoiding the air entrapment caused by the large flat surface falling vertically into the glue solution. In the present invention, as the front end face of the product enters the glue solution, the inclination angle of the mold gradually decreases until the mold is fully clamped, then it is moved into an oven, demolded after heating for a certain time, and the parting line and the overflow groove are cleaned, providing a vulcanizing mold without gate marks. The structure of the present invention is simply designed, with low operation and processing difficulties, and over-extrusion is prevented during the extrusion molding.

[0092] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0093] Without conflict, those skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effects, and the specific combination situations are not elaborated herein one by one.

[0094] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0095] The above are only the preferred embodiments of the present invention. The present invention will not be limited to these embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An extrusion molding vulcanization mold, characterized in that: It includes a support rod (2), a guide rod (3), a support plate (4), an extrusion bolt (5), a deep groove ball bearing (8), a lock nut (9), a cover plate (10), a connecting plate (12), a limiting rod (14), a cavity plate (15), a turntable (17) and a fixing mechanism; the cavity plate (15) is placed on the turntable (17); at least two limiting rods (14) are vertically and evenly fixed on the upper surface of the cavity plate (15); the support plate (4) is connected to the cavity plate (15) through at least two support rods (2) arranged evenly, and the support rods (2) are arranged outside the limiting rods (14); the lower end of the extrusion bolt (5) passes through the center of the support plate (4), the cover plate (10) is sleeved on the lower part of the extrusion bolt (5), the lower end of the extrusion bolt (5) is connected to the connecting plate (12) through a deep groove ball bearing (8) and is fastened by the extrusion bolt (5); the connecting plate (12) is arranged below the support plate (4); at least two guide rods (3) are evenly arranged and their upper ends are fixed to the support plate (4), and the lower ends of the guide rods (3) pass through the connecting plate (12). The turntable (17) rotates to tilt the cavity plate (15), and when the mold is closed, the front end face of the product enters the glue liquid obliquely.

2. The extrusion molding vulcanization mold according to claim 1, characterized in that: The cavity plate (15) is of a concave-shaped structure; there is a horizontally extending outer eaves (54) on the outer periphery of the cavity at the top of the concave shape, and an annular glue overflow groove (20) is opened at the junction of the side wall of the cavity plate (15) and the outer eaves (54); the inner side wall of the cavity plate (15) is a cavity curved surface (18) matching the shell to be vulcanized (53); a plurality of straight slots (19) are evenly arranged along the inner edge of the upper end face of the cavity plate (15), and the inner cavity of the cavity plate (15) is communicated with the annular glue overflow groove (20) through the straight slots (19); three groups of holes are arranged in a circular array on the surface of the outer eaves (54), and each group of holes includes a first positioning hole (21) for the support rod and a mounting hole (22) for the limiting rod. The centers of the first positioning holes (21) for the support rod, the mounting holes (22) for the limiting rod and the center of the cavity plate (15) in each group are collinear.

3. The extrusion molding vulcanization mold according to claim 1, characterized in that: The support rod (2) is of a straight-shaped stepped structure; the middle of the support rod (2) is a first cylinder (25), and an annular milled flat step (26) is arranged along the circumferential direction of the first cylinder (25); the two ends of the first cylinder (25) are respectively a first cylinder rod (27) and a support plate positioning cylinder rod (24), a support plate fixing thread (23) is arranged at the end of the support plate positioning cylinder rod (24), and a first thread (28) is arranged at the end of the first cylinder rod (27).

4. The extrusion molding vulcanization mold according to claim 1, characterized in that: The support plate (4) is disc-shaped, a first threaded hole (31) for the extrusion bolt (5) to pass through is opened at the center of the support plate (4), and multiple groups of second positioning holes (29) for connecting the support rod (2) and first positioning holes (30) for connecting the guide rod (3) are arranged in a circular array on the plate surface of the support plate (4); the centers of the second positioning holes (29) for the support rod and the first positioning holes (30) for the guide rod in each group are collinear with the center of the first threaded hole (31).

5. An extrusion molding vulcanization mold according to claim 1, characterized in that: The described connecting plate (12) is of a concave-shaped disc structure; a circular counterbore (35) for connecting and making way for the deep groove ball bearing (8) is provided at the center of the connecting plate (12); a plurality of second threaded holes (34) for fixing the cover plate (10) to the connecting plate (12), a plurality of guide rod sliding and positioning holes (33), and a plurality of through holes (32) are symmetrically arranged in sequence outward with the circular counterbore (35) as the center; a plurality of circular holes (36) for fixing the deep groove ball bearing (8) are evenly arranged at the bottom of the circular counterbore (35).

6. The extrusion molding vulcanization mold according to claim 1, characterized in that: The middle part of the described extrusion bolt (5) is a cylinder, and an extrusion bolt thread (39) is provided on the outer circumference of the cylinder; one end of the cylinder is a cylindrical first smooth rod (40), and a second thread (41) is provided at the end of the first smooth rod (40); the other end of the cylinder is a square boss (38), and a square groove (37) with a size of 10mm×10mm and a depth of 15mm is provided at the center of the boss (38).

7. The extrusion molding vulcanization mold according to claim 1, characterized in that: The described cover plate (10) is a circular plate, a second through hole (43) for the extrusion bolt (5) to pass through is provided at the center of the cover plate (10), and a plurality of first through holes (42) for fixing to the connecting plate (12) are arranged in a circular array on the plate surface of the cover plate (10).

8. The extrusion molding vulcanization mold according to claim 1, characterized in that: The described guide rod (3) is an integral structure composed of a second smooth rod (45) and a cylindrical platform (44), the cylindrical platform (44) is horizontally arranged at one end of the second smooth rod (45), a third threaded hole (46) is provided at the other end of the second smooth rod (45), and a third screw (13) for preventing the connecting plate (12) from disengaging from the guide rod (3) is connected to the third threaded hole (46).

9. The extrusion molding vulcanization mold according to claim 1, characterized in that: The described limit rod (14) is an integral structure composed of a second cylindrical rod (47) and a third cylindrical rod (48); the outer diameter and length of the second cylindrical rod (47) are both larger than the outer diameter and length of the third cylindrical rod (48); the described locking nut (9) is of an annular structure; two concave card slots (51) are symmetrically provided on the outer edge of the ring surface, and the central connection line of the two concave card slots (51) passes through the center of the ring; a countersunk head screw hole (49) is also provided on the ring surface, and the central connection line of the countersunk head screw hole (49) and the center of the ring is perpendicular to the central connection line of the two concave card slots (51); a locking thread (50) is provided on the inner side wall of the locking nut (9); an opening slot (52) is provided on the outer side wall of the locking nut (9), and the axis of the opening slot (52) is perpendicular to the side wall.

10. The usage method of an extrusion molding vulcanization mold according to any one of claims 1-9, characterized in that, Including the following steps, Step 1: Fix the shell to be vulcanized (53) on the connecting plate (12); pass the support plate (4) through the support rod (2) and fix it; place the cavity plate (15) on the fixing groove of the turntable (17). Step 2: Rotate the turntable (17) to a preset angle to tilt the cavity plate (15), pour glue into the cavity plate (15), and rotate the extrusion bolt (5) to gradually make the shell to be vulcanized (53) enter the cavity plate (15) and immerse it in the glue. Step 3: When the lower end face of the shell to be vulcanized (53) is completely immersed in the glue solution, rotate the turntable (17) to the horizontal position, and continue to rotate and press the bolt (5) until the connecting plate (12) touches the limiting rod (14). Step 4: After the shell to be vulcanized (53) is completely clamped with the die cavity plate (15), move it into the oven, demold it after heating for a preset time, and clean the parting line and the overflow groove.

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