Rubber mold forming mold

Abstract

The utility model relates to the technical field of forming molds, and provides a rubber mold forming mold which comprises an upper mold base, a lower mold base and a positioning pre-tightening assembly. The upper die base is provided with an upper die core. The lower die holder is correspondingly arranged below the upper die holder and is provided with a lower die core; the positioning pre-tightening assembly is arranged on the upper die base or the lower die base and used for positioning and pre-tightening the upper die base and the lower die base. The positioning and pre-tightening assembly comprises positioning pieces which are installed in the upper die base and the lower die base in a penetrating mode correspondingly, and pre-tightening pieces which are detachably clamped and locked to the positioning pieces. The pre-tightening piece can apply pre-tightening pressure to the upper die base or the lower die base in the axial direction of the positioning piece. According to the rubber mold forming mold, the problem that the upper mold core and the lower mold core deviate due to heating vulcanization expansion pressure of rubber particles can be effectively avoided, and the forming yield of rubber mold parts is greatly increased.

Description

Technical Field

[0001] The present disclosure relates to the technical field of molding dies, and particularly to a rubber mold molding die. Background Art

[0002] Rubber molds are mainly used in process environments that require enhanced molding pressure or transfer of molding pressure. For example, when forming a vertical part on a ribbed plate, the expansion of the rubber mold causes the side of the vertical part in the workpiece to be subjected to process pressure. There are two basic forms of application of rubber molds, namely fixed volume and variable volume. In the fixed volume method, the part and the rubber material are completely enclosed in a flip-up metal frame, and the expansion of the rubber can effectively subject the workpiece to a uniform fluid pressure. In the variable volume method, a vacuum bag or a soft flexible uniform pressing plate covers the rubber mold, so that there is no longer a need to accurately calculate the volume of the rubber mold.

[0003] When the rubber mold molding die in the fixed volume mode in the prior art is used, during the initial heating and vulcanization reaction of the rubber particle material, a certain expansion pressure is generated inside the mold core of the rubber mold. Although there is a certain self-weight pressure between the upper mold and the lower mold, the expansion pressure of the molten rubber still has a certain risk of causing slight displacements in the up-down, front-back, and left-right directions of the rubber mold, affecting the yield rate of parts during molding.

[0004] Therefore, there is an urgent need in the market for a rubber mold molding die that can perform effective pre-tightening and positioning and overcome the low yield rate of parts during molding caused by rubber expansion pressure. Summary of the Utility Model

[0005] The embodiment of the present disclosure provides a rubber mold molding die to solve the problem that the rubber mold molding die in the prior art is prone to slight displacement due to internal pressure during the melting and expansion of rubber, affecting the yield rate of parts during molding.

[0006] The rubber mold molding die provided by the embodiment of the present disclosure includes an upper mold base, a lower mold base, and a positioning and pre-tightening assembly;

[0007] The upper mold base has an upper mold core;

[0008] The lower mold base is correspondingly arranged below the upper mold base and has a lower mold core;

[0009] The positioning and pre-tightening assembly is arranged on the upper mold base or the lower mold base and is used for positioning and pre-tightening the upper mold base and the lower mold base;

[0010] Wherein, the positioning and pre-tightening assembly includes positioning members respectively inserted into the upper mold base and the lower mold base, and pre-tightening members detachably locked to the positioning members;

[0011] The pre-tightening member can apply a pre-tightening pressure along the axial direction of the positioning member towards the upper die holder or towards the lower die holder.

[0012] In an implementable embodiment, a limiting sliding groove is formed on one side of the upper die holder facing away from the lower die holder;

[0013] The pre-tightening member is slidably and limitedly arranged in the limiting sliding groove, and can be inserted into the positioning member along the radial direction of the positioning member for locking, or slid out of the positioning member for unlocking.

[0014] In an implementable embodiment, the pre-tightening member includes an insertion and carding part;

[0015] The insertion and carding part extends along the length direction of the limiting sliding groove, and the insertion and carding part is in a wedge shape with a gradually decreasing thickness;

[0016] The positioning member is correspondingly provided with a through hole for inserting and locking the insertion and carding part along its own radial direction.

[0017] In an implementable embodiment, a sunken installation hole is arranged in the lower die holder;

[0018] One end of the positioning member is inserted into the installation hole and is fixed to the installation hole by screwing with a screw.

[0019] In an implementable embodiment, an auxiliary positioning post protruding towards the upper die holder is further arranged in the lower die holder;

[0020] A through hole for inserting and positioning the auxiliary positioning post is correspondingly formed in the upper die holder.

[0021] In an implementable embodiment, a plurality of heating pipelines for heating the upper die core are formed in the upper die holder;

[0022] A plurality of heating pipelines for heating the lower die core are formed in the lower die holder.

[0023] In an implementable embodiment, the rubber mold forming die further includes a support base supported below the lower die holder;

[0024] A thimble rod is arranged in the support base;

[0025] The top end of the thimble rod is inserted into the lower die core of the lower die holder, and can protrude upwards to push the forming die in the lower die core.

[0026] In an implementable embodiment, lifting rings are respectively arranged in the upper die holder and the lower die holder.

[0027] In an implementable embodiment, a limiting stop platform is further protrudingly arranged on the top side of the upper die holder.

[0028] In one implementable embodiment, the upper die core and the lower die core are respectively provided with concave and convex structures;

[0029] When the upper die core and the lower die core are press-fitted correspondingly, the concave and convex structures cooperate with each other to form a rubber mold forming cavity.

[0030] Before the rubber mold forming die provided by the embodiment of the present disclosure hot-presses rubber particles, during the process of the upper die base covering the lower die base, the positioning member in the positioning and pre-tightening assembly can correspondingly penetrate and connect the upper die base and the lower die base. In this way, the accurate positioning of the upper die base and the lower die base in the front-back and left-right directions is achieved through the positioning member; then the pre-tightening member is locked to the positioning member, so that the pre-tightening member can apply a pre-tightening pressure along the axial direction of the positioning member towards the upper die base or towards the lower die base. In this way, the accurate positioning of the upper die base and the lower die base in the up-down direction is achieved through the pre-tightening member. Therefore, the rubber mold forming die can effectively avoid the problem that the upper die core and the lower die core shift due to the heating and vulcanization expansion pressure of the rubber particles, and greatly improve the forming yield rate of the rubber mold parts.

[0031] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become easily understood. In the drawings, several embodiments of the present disclosure are shown in an exemplary rather than restrictive manner, wherein:

[0033] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0034] Figure 1 A three-dimensional structure diagram of the rubber mold forming die provided by the embodiment of the present disclosure is shown;

[0035] Figure 2 A vertical cross-sectional view of the rubber mold forming die provided by the embodiment of the present disclosure is shown;

[0036] Figure 3 A three-dimensional cross-sectional view of the rubber mold forming die provided by the embodiment of the present disclosure is shown;

[0037] Figure 4 A vertical cross-sectional view of the rubber mold forming die provided by the embodiment of the present disclosure along the positioning and pre-tightening assembly is shown.

[0038] Description of reference numerals in the figure: 1. Upper die holder; 11. Upper die core; 12. Limit retaining platform; 13. First heating pipeline; 101. Limit sliding groove; 102. Lifting ring; 2. Lower die holder; 21. Lower die core; 22. Auxiliary positioning column; 23. Second heating pipeline; 24. Mounting hole; 3. Positioning and pre-tightening assembly; 31. Positioning member; 32. Pre-tightening member; 321. Insertion and card portion; 4. Support base; 41. Thimble rod. Detailed implementation mode

[0039] To make the objectives, features, and advantages of the present disclosure more obvious and understandable, the following will clearly and completely describe the technical solutions in the embodiments of the present disclosure in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present disclosure.

[0040] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0041] Combined with Figure 1 , Figure 2 and Figure 3 As shown in

[0042] The embodiment of the present disclosure provides a rubber mold forming die, which includes an upper die holder 1, a lower die holder 2, and a positioning and pre-tightening assembly 3; the upper die holder 1 has an upper die core 11; the lower die holder 2 is correspondingly arranged below the upper die holder 1 and has a lower die core 21; the positioning and pre-tightening assembly 3 is arranged on the upper die holder 1 or the lower die holder 2 for positioning and pre-tightening the upper die holder 1 and the lower die holder 2;

[0043] Before hot-pressing the rubber particles, the upper die base 1 and the lower die base 2 are first covered correspondingly, so that the upper die core 11 and the lower die core 21 form a rubber mold forming cavity with each other. And during the process of covering the upper die base 1 towards the lower die base, the positioning member 31 in the positioning and pre-tightening assembly 3 can correspondingly penetrate and connect the upper die base 1 and the lower die base 2, so that the accurate positioning of the upper die base 1 and the lower die base 2 in the front-back and left-right directions is realized through the positioning member 31. Then, the pre-tightening member 32 is locked to the positioning member 31, so that the pre-tightening member 32 can apply a pre-tightening pressure along the axial direction of the positioning member 31 towards the upper die base 1 or towards the lower die base 2, so that the accurate positioning of the upper die base 1 and the lower die base 2 in the up-down direction is realized through the pre-tightening member 32. In this way, when heating and vulcanizing the rubber particles, although the thermal melting process of the rubber particles will also generate a certain expansion pressure on the upper die core 11 and the lower die core 21, it will no longer cause any tiny displacement of the upper die core 11 and the lower die core 21 in any direction. After the rubber particles are completely melted, finally, the upper die base 1 is pressurized through a pressurizing device, and the preparation of the rubber mold part can be finally completed.

[0044] In summary, the rubber mold forming die provided by the embodiment of the present disclosure can respectively pre-tighten and fix the upper die base 1 and the lower die base 2 in the front-back, left-right and up-down directions through the positioning member 31 and the pre-tightening member 32 in the positioning and pre-tightening assembly 3, effectively avoiding the problem that the upper die core 11 and the lower die core 21 are offset due to the expansion pressure generated during the heating and vulcanization of the rubber particles, and greatly improving the forming yield rate of the rubber mold part.

[0045] In an implementable manner, a limiting sliding groove 101 is opened on the side of the upper die base 1 facing away from the lower die base 2; the pre-tightening member 32 is slidably and limitedly arranged in the limiting sliding groove 101, and can be inserted into the positioning member 31 along the radial direction of the positioning member 31 for locking, or slid out of the positioning member 31 for unlocking.

[0046] Specifically, in combination with Figure 1 and Figure 4 For further detailed description, specifically, a limiting sliding groove 101 is opened on the side of the upper die base 1 facing away from the lower die base 2, and the pre-tightening member 32 is slidably and limitedly arranged in the limiting sliding groove 101, so that the pre-tightening member 32 can reciprocally slide in the limiting sliding groove 101, thereby correspondingly realizing the functions of inserting into the positioning member 31 along the radial direction of the positioning member 31 for locking, or sliding out of the positioning member 31 along the radial direction of the positioning member 31 for unlocking.

[0047] Moreover, when the pre-tightening member 32 is locked to the positioning member 31, the pre-tightening member 32 can press downward on the limiting sliding groove 101 in the upper die base 1, thereby realizing the function of mutually pressing and pre-tightening the upper die base 1 and the lower die base 2.

[0048] Of course, the above-mentioned limiting sliding groove 101 can also be correspondingly arranged on the side of the lower die base 2 facing away from the upper die base 1, and the locking or unlocking function with the positioning member 31 is also realized by the reciprocating sliding of the pre-tightening member 32 in the limiting sliding groove 101.

[0049] The specific setting method of the above-mentioned positioning member 31 and the pre-tightening member 32 has the beneficial effects of simple structure and sensitive realization of locking and limiting and unlocking and releasing.

[0050] In an implementable manner, the pre-tightening member 32 includes an insertion card portion 321; the insertion card portion 321 extends along the length direction of the limiting sliding groove 101, and the insertion card portion 321 is in the shape of a wedge strip with a gradually decreasing thickness; the positioning member 31 is correspondingly provided with a through hole for inserting and locking the insertion card portion 321 along its own radial direction.

[0051] Specifically, combined with Figure 3 and Figure 4 For further detailed description, a corresponding insertion card portion 321 is also provided in the pre-tightening member 32, and the insertion card portion 321 is specifically arranged to extend along the length direction of the limiting sliding groove 101 and is in the shape of a wedge strip with a gradually decreasing thickness. In this way, the positioning member 31 is correspondingly provided with a through hole for inserting and locking the insertion card portion 321 along its own radial direction. By gradually inserting the wedge-shaped insertion card portion 321 into the through hole, the locking of the pre-tightening member 32 and the positioning member 31 can be realized. Moreover, the greater the insertion amplitude of the wedge-shaped insertion card portion 321 into the through hole in the insertion card portion 321, the greater the locking pre-tightening pressure generated between the two, and the better the pre-tightening and fixing effect of the upper die base 1 and the lower die base 2 in the up and down directions.

[0052] The specific setting method of the above-mentioned insertion card portion 321 has the beneficial effects of simple structure and sensitive adjustment of the locking pre-tightening pressure with the positioning member 31.

[0053] In an implementable manner, a sunken mounting hole 24 is provided in the lower die base 2, and one end of the positioning member 31 is inserted into the mounting hole 24 and is screwed and fixed to the mounting hole 24 by a screw.

[0054] Specifically, combined with Figure 4 For further detailed description, a sunken mounting hole 24 is provided in the lower die base 2, so that one end of the positioning member 31 can be limited and inserted into the mounting hole 24 and can be stably fixed in the mounting hole 24 by screwing. In this way, when the upper die base 1 is pre-assembled and covered towards the lower die base 2, the positioning member 31 can remain stationary, and the upper die base 1 faces the positioning member 31 relatively and is penetrated by the positioning member 31.

[0055] The specific setting method of the above-mentioned positioning member 31 has the beneficial effects of simple structure and stable and firm installation in the lower die base 2.

[0056] In an implementable embodiment, an auxiliary positioning post 22 protruding towards the upper die base 1 is further provided in the lower die base 2; a through hole for the auxiliary positioning post 22 to be inserted and positioned is correspondingly provided in the upper die base 1.

[0057] Specifically, in combination with Figure 1 and Figure 2 For further detailed description, an auxiliary positioning post 22 protruding towards the upper die base 1 is further provided in the lower die base 2, and a through hole for the auxiliary positioning post 22 to be inserted and positioned is correspondingly provided in the upper die base 1. In this way, when the upper die base 1 is pre - assembled and covered towards the lower die base 2, the auxiliary positioning post 22 can be correspondingly inserted into the through hole in the upper die base 1. The auxiliary positioning post 22 and the positioning member 31 can cooperate to fully ensure the accurate and reliable positioning of the upper die base 1 and the lower die base 2 in the front - rear and left - right directions.

[0058] In an implementable embodiment, a plurality of first heating pipelines 13 for heating the upper die core 11 are provided in the upper die base 1; a plurality of second heating pipelines 23 for heating the lower die core 21 are provided in the lower die base 2.

[0059] Specifically, in combination with Figure 3 For further detailed description, a plurality of first heating pipelines 13 for heating the upper die core 11 are provided in the upper die base 1, and a plurality of second heating pipelines 23 for heating the lower die core 21 are provided in the lower die base 2. In this way, the first heating pipelines 13 can heat the upper die core 11 sufficiently and evenly, and the second heating pipelines 23 can heat the lower die core 21 sufficiently and evenly, making the heating processes of the upper die core 11 and the lower die core 21 independent of each other and not interfering with each other.

[0060] In an implementable embodiment, the rubber mold forming die further includes a support base 4 supported below the lower die base 2; a thimble rod member 41 is provided in the support base 4; the top end of the thimble rod member 41 is inserted into the lower die core 21 of the lower die base 2 and can protrude upward to push the forming die in the lower die core 21.

[0061] Specifically, in combination with Figure 2 and Figure 3 For further detailed description, the rubber mold forming die further includes a support base 4 supported below the lower die base 2, and a thimble rod member 41 with its top end inserted into the lower die core 21 of the lower die base 2 is provided in the support base 4. In this way, when the rubber mold forming die finishes hot - pressing and preparing the rubber mold part, the upper die base 1 moves away from the lower die base 2 to open the die. At this time, the thimble rod member 41 in the support base 4 can correspondingly push upward, so as to push the rubber mold part out of the lower die core 21 for demolding.

[0062] In an implementable embodiment, lifting rings 102 are respectively provided in the upper die base 1 and the lower die base 2.

[0063] Specifically, in combination with Figure 1 For further detailed description, specifically, lifting rings 102 can be provided in the side walls of the upper die base 1 and the lower die base 2 respectively. In this way, the lifting mechanism can lift and transport the upper die base 1 or the lower die base 2 by correspondingly hooking the lifting rings 102.

[0064] In an implementable embodiment, a limiting stop platform 12 is further convexly provided on the top side of the upper die base 1.

[0065] Specifically, in combination with Figure 1 For further detailed description, two limiting stop platforms 12 can be specifically arranged at intervals on the top side of the upper die base 1. In this way, the limiting stop platforms 12 can form a limiting space for restricting the pressing device, so that the pressing device can stably apply the pressing force to the upper die base 1, further improving the stability and the qualified product rate during the pressing and forming of the rubber mold forming die.

[0066] In an implementable embodiment, the upper die core 11 and the lower die core 21 are respectively provided with concave and convex structures; when the upper die core 11 and the lower die core 21 are press-fitted correspondingly, the concave and convex structures cooperate with each other to form a rubber mold forming cavity.

[0067] Specifically, in combination with Figure 2 For further detailed description, concave and convex structures are respectively arranged on the mutually corresponding contact surfaces of the upper die core 11 and the lower die core 21. In this way, when the upper die core 11 and the lower die core 21 are press-fitted correspondingly, the concave and convex structures in the two are correspondingly buckled to form a rubber mold forming cavity. In this way, the rubber can be heated and melted in the rubber mold forming cavity and surround the metal part, and the concave and convex structures can further accurately position the upper die core 11 and the lower die core 21, ensuring the accuracy of the die pressing and forming of the two.

[0068] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, "a plurality" means two or more unless otherwise specifically defined.

[0069] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A rubber mold forming die, characterized in that, Comprising: An upper die base (1) having an upper die core (11); A lower die base (2) correspondingly disposed below the upper die base (1) and having a lower die core (21); A positioning and pre-tightening assembly (3) disposed on the upper die base (1) or the lower die base (2) for positioning and pre-tightening the upper die base (1) and the lower die base (2); Wherein, the positioning and pre-tightening assembly (3) includes a positioning member (31) respectively inserted through the upper die base (1) and the lower die base (2), and a pre-tightening member (32) detachably latched to the positioning member (31); The pre-tightening member (32) can apply pre-tightening pressure along the axial direction of the positioning member (31) towards the upper die base (1) or towards the lower die base (2).

2. The rubber mold forming die according to claim 1, characterized in that, A limiting chute (101) is formed on one side of the upper die base (1) facing away from the lower die base (2); The pre-tightening member (32) is slidably and limitedly disposed in the limiting chute (101), and can be inserted into the positioning member (31) along the radial direction of the positioning member (31) for latching, or slid out of the positioning member (31) for unlocking.

3. The rubber mold forming die according to claim 2, wherein, The pre-tightening member (32) includes an insertion and latching portion (321); The insertion and latching portion (321) extends along the length direction of the limiting chute (101), and the insertion and latching portion (321) is in the shape of a wedge bar with a gradually decreasing thickness; The positioning member (31) is correspondingly provided with a through hole for inserting and latching the insertion and latching portion (321) along its radial direction.

4. The rubber mold forming die according to claim 1, characterized in that, A recessed mounting hole (24) is provided in the lower die base (2); One end of the positioning member (31) is inserted into the mounting hole (24) and is fixed to the mounting hole (24) by screwing.

5. The rubber mold forming die according to claim 4, wherein, An auxiliary positioning post (22) protruding towards the upper die base (1) is further provided in the lower die base (2); A through hole for inserting and positioning the auxiliary positioning post (22) is correspondingly formed in the upper die base (1).

6. The rubber mold forming die according to claim 1, characterized in that, A plurality of first heating pipelines (13) for heating the upper die core (11) are formed in the upper die base (1); A plurality of second heating pipelines (23) for heating the lower die core (21) are formed in the lower die base (2).

7. The rubber mold forming die according to claim 1, characterized in that, The rubber mold forming die further includes a support base (4) supported below the lower die base (2); A thimble rod member (41) is provided in the support base (4); The top end of the thimble rod member (41) is inserted into the lower die core (21) of the lower die base (2), and can protrude upward to push the forming die in the lower die core (21).

8. The rubber mold forming die according to claim 1, wherein Lifting rings (102) are respectively provided in the upper die base (1) and the lower die base (2).

9. The rubber mold forming die according to claim 1, wherein, A limiting stop platform (12) is further protrudingly provided on the top side of the upper die base (1).

10. The rubber mold forming die according to any one of claims 1 to 9, characterized in that, The upper die core (11) and the lower die core (21) are respectively provided with concave and convex structures; When the upper die core (11) and the lower die core (21) are correspondingly pressed together, the concave and convex structures cooperate with each other to form a rubber mold forming cavity.

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