SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an injection mold for solve traditional injection mold uneven technical problem of wall thickness when producing the product of dark tubular structure.
In order to achieve one or part or all of the above purposes or other purposes, the utility model provides an injection mold, the injection mold comprises a liquid outlet component, a positioning ring, a first molding die and a second molding die sleeved on the first molding die, the second molding die is provided with a through hole, the first molding die passes through the through hole and has a gap with the inner wall of the second molding die to form a die cavity, and the liquid outlet component is communicated with the die cavity; the positioning ring is provided with a positioning hole and a positioning groove, the positioning hole penetrates through the positioning ring, and the positioning groove is positioned on one surface of the positioning ring in the axial direction; the first molding die penetrates through the positioning hole and the through hole, one end of the second molding die is clamped with the positioning groove, and the positioning ring simultaneously fixes the first molding die and the second molding die so as to fix the relative position between the first molding die and the second molding die.
Preferably, the second forming die comprises an injection molding part, a forming part and a positioning part, the injection molding part and the positioning part are positioned on two opposite sides of the forming part, the through hole penetrates through the injection molding part, the forming part and the positioning part, and the positioning part is clamped with the positioning groove.
Preferably, the liquid outlet assembly comprises a liquid outlet pipe, a liquid inlet pipe and a connecting block, the liquid outlet pipe and the liquid inlet pipe are connected through the connecting block, and a pipeline communicated with the liquid outlet pipe and the liquid inlet pipe is arranged in the connecting block.
Preferably, a groove is formed in the first forming die, and the groove is located on one surface, close to the liquid outlet assembly, of the first forming die.
Preferably, the injection mold further comprises a cooling member, wherein the cooling member is positioned in the first forming mold and is communicated with a water source.
Preferably, the positioning groove is an annular groove, and the positioning groove is concentric with the positioning hole.
Preferably, the injection mold further comprises a bracket, wherein the bracket comprises a forming fixing piece and an eccentric fixing piece which are connected with each other; a first forming hole is formed in the forming fixing piece, a second forming hole is formed in the eccentric fixing piece, and the first forming hole and the second forming hole are concentric; the positioning ring is located in the second forming hole, the first forming die penetrates through the first forming hole, the second forming hole and the positioning ring at the same time, and the second forming die penetrates through the first forming hole and is clamped with the positioning ring.
Preferably, the forming fixing piece comprises a connecting plate and a positioning plate, the connecting plate is provided with a connecting hole, and the positioning plate is positioned in the connecting hole and connected with the connecting plate; the eccentric mounting includes push pedal and reinforcing plate, the holding tank has been seted up on the reinforcing plate, the push pedal is located in the holding tank.
Preferably, the eccentric mounting still includes the stopper, the stopper is located the push pedal is kept away from the one side of reinforcing plate, and with the push pedal is connected, the locating plate is close to the spacing groove has been seted up in the one side of push pedal, the stopper with the spacing groove joint.
Preferably, eccentric mounting still includes the regulating block, the regulating block is located in the holding tank, simultaneously with holding tank inner wall reaches the push pedal contact.
Implement the embodiment of the utility model provides a, will have following beneficial effect:
after the injection mold is adopted, the first forming mold and the second forming mold are simultaneously connected with the positioning ring, so that the relative position between the first forming mold and the second forming mold is fixed through the positioning ring, and the shape of a mold cavity formed after the first forming mold and the second forming mold are matched is also fixed. Therefore, in the injection molding process, the shape of the mold cavity cannot be changed, so that the uniform wall thickness of the injection molded product is ensured, and the wall thickness of the product cannot be changed due to the change of the mold cavity.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Wherein:
fig. 1 is a schematic structural diagram of an injection mold according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic view of the liquid outlet assembly of FIG. 1;
fig. 4 is a schematic structural view of the second molding die of fig. 1;
FIG. 5 is a schematic view of the position relationship between the liquid outlet assembly and the first and second forming dies in FIG. 1;
FIG. 6 is a schematic structural view of the retaining ring of FIG. 1;
fig. 7 is a schematic view showing the positional relationship between the second molding die and the positioning ring and the first molding die according to an embodiment of the present invention;
fig. 8 is a schematic structural view of the first molding die of fig. 1;
fig. 9 is a schematic view showing a positional relationship between the first molding die and the cooling member according to an embodiment of the present invention;
FIG. 10 is a schematic view showing the positional relationship between the second molding die and the cooling member according to an embodiment of the present invention;
fig. 11 is a schematic view of the position relationship between the bracket and other mechanisms according to an embodiment of the present invention;
fig. 12 is a schematic structural view of a bracket according to an embodiment of the present invention;
FIG. 13 is a schematic view of the eccentric fastener of FIG. 12;
FIG. 14 is a schematic view of the positional relationship of the shaped seating member and the push plate of FIG. 12.
The reference numbers in the drawings are as follows:
10. injection molding a mold;
100. a liquid outlet assembly; 110. a liquid outlet pipe; 120. a liquid inlet pipe; 130. connecting blocks;
200. a first molding die; 210. a groove;
300. a second molding die; 310. an injection molding part; 320. a molding section; 330. a positioning part; 340. a through hole;
400. a positioning ring; 410. positioning holes; 420. positioning a groove;
500. a mold cavity; 600. a cooling member;
700. a support; 710. a liquid outlet fixing piece; 720. forming a fixing piece; 721. a connecting plate; 7211. connecting holes; 722. positioning a plate; 7221. a limiting groove; 723. a first forming hole; 730. an eccentric fixing member; 731. pushing the plate; 732. a reinforcing plate; 7321. accommodating grooves; 733. a second molding hole; 734. a limiting block; 735. an adjusting block; 740. a base; 750. a guide member.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 and 2, the present invention provides an injection mold 10 for injecting an injection molding liquid into the injection mold 10 and cooling the injection molding liquid to form a cylindrical product. The injection mold 10 includes a liquid outlet assembly 100, a first molding die 200, a second molding die 300, and a positioning ring 400. The liquid outlet assembly 100 is used for providing injection molding liquid, a through hole 340 is formed in the second molding die 300, the first molding die 200 is inserted into the second molding die 300 by penetrating through the through hole 340, and a gap is formed between the inner walls of the first molding die 200 and the second molding die 300 to form the mold cavity 500. The liquid outlet assembly 100 is communicated with the mold cavity 500, and the injection molding liquid is injected into the mold cavity 500 through the liquid outlet assembly 100 and is cooled and solidified, so that a molded product is obtained. The positioning ring 400 has a positioning hole 410 and a positioning groove 420 at the middle and the periphery thereof, wherein the positioning hole 410 penetrates through the positioning ring 400, and the positioning groove 420 is located on one side of the positioning ring 400 in the axial direction. The first molding die 200 passes through the positioning hole 410 and the through hole 340, and one end of the second molding die 300 is in insertion fit with the positioning groove 420, so that the first molding die 200 and the second molding die 300 are simultaneously fixed by the positioning ring 400 to fix the relative position between the first molding die 200 and the second molding die 300, thereby ensuring that no relative displacement occurs between the first molding die 200 and the second molding die 300 in the injection molding process, and further ensuring that the wall thickness of the finally obtained product is uniform.
The injection liquid may be a liquid plastic or a liquid silicone rubber, and after the injection liquid is cooled and solidified in the cavity 500, a product having the same shape as the cavity 500 may be formed.
Note that, in the present embodiment, the perpendicularity of the first molding die 200 and the second molding die 300 in the axial direction is within 0.01 mm.
Referring to fig. 3, the liquid outlet assembly 100 includes a liquid outlet pipe 110, a liquid inlet pipe 120 and a connecting block 130, wherein the connecting block 130 is connected to the liquid outlet pipe 110 and the liquid inlet pipe 120 respectively. The injection liquid enters from the liquid inlet pipe 120, flows into the liquid outlet pipe 110 through the connecting block 130, and is injected into the mold cavity 500 from the liquid outlet pipe 110.
It can be understood that the connecting block 130 has a channel formed therein for communicating the liquid inlet pipe 120 and the liquid outlet pipe 110, and the injection liquid flows into the liquid outlet pipe 110 in the channel after entering from the liquid inlet pipe 120.
Referring to fig. 4 and 5, the second molding die 300 includes an injection molding portion 310, a molding portion 320, and a positioning portion 330, and the injection molding portion 310 and the positioning portion 330 are located at two opposite sides of the molding portion 320. The through hole 340 penetrates the injection portion 310, the molding portion 320 and the positioning portion 330, and the first molding die 200 penetrates the through hole 340 and cooperates with the second molding die 300 to form the mold cavity 500. The liquid outlet assembly 100 injects the injection liquid into the mold cavity 500, and after the injection liquid is cooled and solidified, a product with the same shape as the mold cavity 500 is formed.
Specifically, the first molding die 200 passes through the through-hole 340, and a gap exists between the inside of the through-hole 340 and the inner wall of the second molding die 300 to form the mold cavity 500. More specifically, after the first molding die 200 passes through the through hole 340, one end of the first molding die is flush with the injection portion 310, and the other end of the first molding die passes through the positioning portion 330 and is exposed out of the through hole 340. The size of the through-hole 340 at the positioning portion 330 is adapted to the first molding die 200 so that the first molding die 200 contacts the inner wall of the second molding die 300 at the positioning portion 330 of the second molding die 300, thereby closing the gap between the first molding die 200 and the second molding die 300 at the positioning portion 330. As shown in fig. 5, the liquid outlet pipe 110 of the liquid outlet assembly 100 is located at the injection portion 310 side of the second molding die 300, and after flowing out from the liquid outlet pipe 110, the injection liquid flows into the through hole 340 through the injection portion 310, and flows to the positioning portion 330 through the molding portion 320 along the gap between the first molding die 200 and the second molding die 300. Since the first molding die 200 is in contact with the inner wall of the second molding die 300 at the positioning portion 330, the flow of the injection liquid is stopped when the injection liquid flows thereto, and after the injection liquid fills the gap between the first molding die 200 and the second molding die 300, that is, the mold cavity 500, and is cooled and solidified, a product having a shape in accordance with the mold cavity 500 is formed.
It should be noted that a sealing ring (not shown) is further disposed between the positioning portion 330 of the second molding die 300 and the first molding die 200, so as to further increase the sealing performance between the positioning portion 330 of the second molding die 300 and the first molding die 200, and prevent the injection liquid in the mold cavity 500 from flowing out from the positioning portion 330.
Further, the positioning groove 420 is an annular groove, which is concentric with the positioning hole 410, and the positioning groove 420 is set to be annular, so that the contact area of the second molding die 300 and the positioning groove 420 during the insertion and matching is larger than that of the positioning grooves 420 in other shapes, and the insertion and matching between the second molding die 300 and the positioning groove 420 is firmer.
Referring to fig. 6 to 8, after the first molding die 200 passes through the through hole 340 and the positioning hole 410, the positioning portion 330 of the second molding die 300 is clamped with the positioning ring 400 at the positioning groove 420 of the positioning ring 400, so that the relative position between the first molding die 200 and the second molding die 300 is fixed by the positioning ring 400. Then, in the process of injecting the injection liquid into the mold cavity 500 through the liquid outlet pipe 110 to produce a product, since the relative positions of the first molding die 200 and the second molding die 300 are fixed, the shape of the mold cavity 500 is also fixed, and further, the shape of the product obtained by cooling and solidifying the injection liquid is kept consistent with the shape of the mold cavity 500 actually designed, and the condition that the shape of the mold cavity 500 is changed due to the displacement of the first molding die 200 relative to the second molding die 300 in the injection process, so that the final molded product has uneven wall thickness, etc. is avoided.
It should be noted that the relative position between the first molding die 200 and the second molding die 300 includes the distance between the inner walls of the through holes of the first molding die 200 and the second molding die 300, and the included angle between the axial direction of the first molding die 200 and the axial direction of the second molding die 300.
Further, as shown in fig. 1, 7 and 8, a groove 210 is formed on one surface of the first molding die 200, and the groove 210 is located on one surface of the first molding die 200 close to the liquid outlet assembly 100. When the injection liquid flows out from the outlet pipe 110, the injection liquid enters the groove 210, and when the groove 210 is filled, the injection liquid overflows from the groove 210 and flows into the mold cavity 500. Like this, through setting up recess 210, can avoid moulding plastics liquid directly to fall on the plane when flowing out from drain pipe 110, take place to mould plastics the sputtering of liquid, cause the potential safety hazard.
In the present embodiment, both the first molding die 200 and the second molding die 300 are cylindrical, but in other embodiments, the first molding die 200 and the second molding die 300 may also be rhombic, as long as the first molding die 200 and the second molding die 300 can be matched to form the cavity 500.
Referring to fig. 9 and 10, the injection mold 10 further includes a cooling member 600, and the cooling member 600 is located inside the first molding die 200 and is communicated with an external water source for increasing a cooling speed when the injection liquid is cooled in the mold cavity 500.
Specifically, the first molding die 200 is hollow, the cooling member 600 is in a spiral pipe shape and is located in the first molding die 200, and opposite ends of the cooling member 600 are exposed to the first molding die 200. One end of the cooling member 600 is communicated with an external water source so that water flows into the cooling member 600 and flows out from the other end, thereby cooling the first molding die 200. By cooling the first forming die 200, the temperature of the injection molding liquid in the die cavity 500 is reduced, and the solidification speed of the injection molding liquid is increased.
Further, one end of the cooling member 600, which is not communicated with a water source, extends along the axial direction of the second molding die 300, and spirally surrounds one surface of the second molding die 300, which is away from the first molding die 200, so that the contact area between the coolant and the first molding die 200 and the second molding die 300 is further increased, and the cooling effect is further improved.
Referring to fig. 11 to 14, the injection mold 10 further includes a support 700, wherein the support 700 is mainly used for supporting the liquid outlet assembly 100, the first forming mold 200, the second forming mold 300 and the positioning ring 400 so as to fix the relative positions of the liquid outlet assembly 100, the first forming mold 200, the second forming mold 300 and the positioning ring 400. In the present embodiment, the bracket 700 includes a liquid outlet fixing member 710, a forming fixing member 720, an eccentric fixing member 730 and a base 740 connected to each other. The liquid outlet fixing member 710 is hollow, the liquid outlet assembly 100 is located in the liquid outlet fixing member 710, and the liquid outlet pipe 110 is exposed out of the liquid outlet fixing member 710. The molding fixture 720 is provided with a first molding hole 723, and the first molding die 200 and the second molding die 300 are located in the first molding hole 723. The eccentric fixing member 730 is provided with a second forming hole 733, the second forming hole 733 is concentric with the first forming hole 723, and the positioning ring 400 is located in the second forming hole 733. The first molding die 200 simultaneously passes through the first molding hole 723, the second molding hole 733, and the positioning ring 400, and connects one end passing through the second molding hole 733 with the base 740. The second molding die 300 passes through the first molding hole 723 and is in snap fit with the positioning ring 400, and the relative position between the first molding die 200 and the second molding die 300 can be further fixed by the mutual fit of the first molding hole 723, the second molding hole 733 and the positioning ring 400.
It should be noted that the liquid outlet fixing member 710, the molding fixing member 720, the eccentric fixing member 730 and the base 740 may be connected together by screws, buckles, or integrally molded, as long as the relative position between the first molding die 200 and the second molding die 300 can be fixed.
It should be noted that, in some embodiments, the liquid outlet fixing member 710 and the base 740 may be omitted, and one end of the first molding die 200 passing through the second molding hole 733 is placed on a horizontal plane, and the injection molding liquid is directly injected into the mold cavity 500 through the liquid outlet assembly 100.
Specifically, the forming fixing member 720 includes a connecting plate 721 and a positioning plate 722, the connecting plate 721 is provided with a connecting hole 7211, the connecting hole 7211 penetrates through the connecting plate 721, and the positioning plate 722 is located in the connecting hole 7211 and connected to the connecting plate 721. The eccentric fixing member 730 includes a push plate 731 and a reinforcing plate 732, wherein the reinforcing plate 732 has an accommodating groove 7321, and the push plate 731 is located in the accommodating groove 7321 and connected to the reinforcing plate 732. The first forming hole 723 is opened on the positioning plate 722 and penetrates through the positioning plate 722, and the second forming hole 733 penetrates through the push plate 731 and the reinforcing plate 732 at the same time.
Furthermore, the eccentric fixing member 730 further includes a limiting block 734 and an adjusting block 735, the limiting block 734 is located on a surface of the push plate 731 away from the reinforcing plate 732, and is connected to the push plate 731. One surface of the positioning plate 722 close to the push plate 731 is provided with a limiting groove 7221 matched with the limiting block 734, and the limiting block 734 is in clamping fit with the limiting groove 7221 to limit the relative displacement between the push plate 731 and the positioning plate 722. That is, it is ensured that the first molding hole 723 is concentric with the second molding hole 733.
The adjusting block 735 is located in the accommodating groove 7321 and contacts with the inner wall of the accommodating groove 7321 and the push plate 731, and the position of the push plate 731 in the accommodating groove 7321 can be adjusted by changing the size of the adjusting block 735. When the push plate 731 is worn after long-term use, which causes the first forming hole 723 and the second forming hole 733 to be eccentric, the push plate 731 adjusts its position in the receiving groove 7321 by changing the size of the adjusting block 735, so as to ensure that the second forming hole 733 is concentric with the first forming hole 723.
Further, the bracket 700 further includes a guide 750, wherein the guide 750 passes through the liquid outlet fixing member 710, the forming fixing member 720, the eccentric fixing member 730 and the base 740. When the injection mold 10 is opened, the guide 750 is used as an assembly reference to prevent the relative positions of the molding fixture 720, the eccentric fixture 730, and the base 740 from shifting when the liquid fixing fixture 710 is discharged during opening the mold, thereby affecting the quality of the product or causing damage to the injection mold 10.
In this embodiment, the concentricity of the first molding hole 723 and the second molding hole 733 is within 0.01 mm.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.