Automatic vulcanization mold and sequential mold opening method for waistband type air spring air bag

Abstract

The application provides a waistband type air spring air bag vulcanization automatic mold opening and closing device and a sequential mold opening and closing method, which comprises a top die, an upper die, a middle die, a bottom die and an inclined guide column, the middle die is composed of a petal die, the number of the inclined guide column is at least two, and the inclined guide column is uniformly arranged on the bottom of the upper die in a circumferential direction; an inclined hole is formed in the middle die, one end of the inclined guide column is fixed to the bottom of the upper die, and the other end is inserted into the inclined hole; a positioning step is arranged on the end of the bottom die facing the middle die, the waistband steel ring is placed on the positioning step before the mold is closed, and the positioning step can coarsely position the waistband steel ring; and the middle die is closed under the action of the inclined guide column to automatically center the waistband steel ring. Although the positioning step has a simple structure, it is combined with the structural characteristics of the inclined guide column and the petal die, and the precise positioning of the waistband steel ring can be realized through simple design, and the automatic positioning of the waistband steel ring is integrated into the automatic positioning steps of other parts of the mold.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of molds, and more particularly to a waistband type air spring air bag vulcanization automatic mold opening and closing mold and a sequential mold opening and closing method. BACKGROUND

[0002] Rail transit vehicles have been widely used in the world due to their strong carrying capacity and low comprehensive cost. Air springs have the advantages of strong carrying capacity, stable self-vibration frequency, strong deformation capacity, and constant vehicle body height through cooperation with a control device, and are widely used in mainline passenger cars, motor trains, and urban rail vehicles. The air spring air bag is an important bearing component of the air spring system, and the compressibility of high-pressure air in the air bag is used to achieve the effect of vibration reduction. The vulcanization of the air bag is an important manufacturing process for the air bag, and the vulcanization mold and process are the basic guarantee for the realization of the air bag product.

[0003] The main feature of the waistband type air bag structure is that there is a waistband steel ring waist at the maximum outer diameter of the air bag, the air bag sub-port diameter is relatively small compared to the maximum outer diameter, and most of the air bag upper and lower sub-port diameters are the same or similar. The waistband type air bag can effectively control the parameter changes of air bag inflation and other characteristics, can bear a large load under the condition of small external size, avoid interference with the vehicle body and bogie, and the waistband structure on the air bag can also effectively restrict the outer diameter expansion of the air bag in the inflated state, reduce the tensile stress of the surface rubber. The waistband type air spring has the advantages of large carrying capacity, high safety factor, small installation space, and has been widely used in subways and large railways.

[0004] The waistband type air spring is composed of an upper cover plate, an air bag, a rubber stack, a support seat, a clasp, etc. The air bag is formed by multiple layers of rubber, canvas, and a waistband steel ring. After vulcanization is completed, the product is separated from the mold cavity with the aid of manual operation. Therefore, how to realize automatic mold opening and closing of the waistband type air bag product is a technical difficulty of this type of product mold.

[0005] The utility model discloses an injection mold for automobile air spring accessories, which comprises a faceplate, an upper mold, a bottom mold, inclined guide columns, a slide, and a bottom plate. The upper end of the faceplate is connected with a sprue bush in the middle. The sprue bush is connected with the flow channel of the mold. The upper end of the upper mold is connected with the faceplate through two symmetrical inclined guide columns. An upper mold insert is connected between the two inclined guide columns of the upper mold. The two inclined guide columns are arranged in a spread shape. The end of the inclined guide column extends into the bottom mold. The bottom mold is below the upper mold. The bottom mold has a bottom mold insert corresponding to the upper mold insert. The slide is arranged between the bottom mold and the upper mold. The bottom plate is connected with a square iron and a support head. The bottom plate is connected with a bottom needle plate. The bottom needle plate is connected with a face needle plate. Compared with the prior art, the utility model provides a new mold. The design is reasonable. The structure is simple. The mold opening movement is stable and reliable. The service life is long. The product produced by the mold has good quality.

[0006] The patent can realize automatic mold opening and closing. The mold opening method is suitable for the injection mold for automobile air spring accessories. The vulcanization process is injection process. The product is pure rubber. The waist belt type air bag product also has a waist belt steel ring waist belt. The positioning of the waist belt steel ring needs to be considered when the mold is closed. The injection mold described in the patent does not consider the automatic positioning problem of the waist belt steel ring. If the waist belt steel ring is added, the patent cannot realize automatic mold opening and closing.

[0007] When the air bag of the air spring is poured (vulcanized), there is a common technical problem that there are many dense air holes on the mold. When the mold is removed, there are many glue hairs. When the upper mold moves up, the middle mold moves up with the upper mold due to the adhesion of the glue hairs, which affects the mold opening. SUMMARY

[0008] The present application provides a waist belt type air spring air bag vulcanization automatic mold opening and closing mold and a sequential mold opening and closing method. The mold can automatically position the waist belt steel ring. When the upper mold moves up, the upper mold and the middle mold can sequentially open the mold.

[0009] The above-mentioned object of the present application is achieved by the following technical scheme:

[0010] A waist belt type air spring air bag vulcanization automatic mold opening and closing mold, comprising a top mold, an upper mold, a middle mold, a bottom mold and inclined guide columns. The middle mold is composed of petal molds. The number of inclined guide columns is at least two. The inclined guide columns are uniformly arranged on the bottom of the upper mold. An inclined hole is opened on the middle mold. One end of the inclined guide column is fixed to the bottom of the upper mold, and the other end is inserted into the inclined hole. A positioning step is arranged on the end of the bottom mold facing the middle mold. The waist belt steel ring is placed on the positioning step before the mold is closed. The positioning step can coarsely position the waist belt steel ring. The middle mold is closed under the action of the inclined guide column to automatically center the waist belt steel ring.

[0011] The middle mold is composed of a plurality of petal molds combined along the circumference.

[0012] Further, the angle of the inclined guide pillar with the horizontal direction is A, the draft angle of the upper die and the middle die is B, the angle A is smaller than the angle B, so that in the mold opening process, the upper die and the middle die are separated first, and then the inclined guide pillar drives the horizontal movement of the middle die, so that the middle die is separated. The design of the angle difference realizes the sequential mold opening and closing.

[0013] Further, a set of edge compression bars are arranged between the upper die and the bottom die, the edge compression bars are fixed with the bottom die, a set of grooves are opened on the side of the edge compression bars facing the middle die, a set of protrusions are arranged on the middle die, and the protrusions extend into the recess structure; the height of the protrusions is matched with the recess structure.

[0014] The edge compression bars are arranged to limit the movement of the middle die in the horizontal direction when the middle die is automatically opened, so as to solve the technical problem that the middle die moves upward with the upper die due to the influence of the viscosity of the glue whisk in the prior art. Furthermore, the edge compression bars are arranged to avoid the deformation of the inclined guide pillar caused by the expansion of the middle die at the moment of mold opening, and the uneven phenomena such as vibration and crawling of the middle die during the horizontal movement of the middle die.

[0015] Further, the cross section of the edge compression bar is in the shape of "7"; one end of the "7" shaped edge compression bar is fixed with the bottom die, and the other end faces the middle die, so as to form the recess structure.

[0016] Further, the edge compression bar is connected with the bottom die through bolts.

[0017] Further, the edge compression bar is fixedly connected with the bottom die, but there is a gap between the edge compression bar and the upper die. The edge compression bar is positioned by the sunken table and connected by bolts, and there is a gap between the edge compression bar and the upper die, so that the maintenance and replacement of the edge compression bar are facilitated.

[0018] A sequential mold opening and closing method using the above-mentioned waistband type air spring air bag vulcanization automatic mold opening and closing mold, characterized in that the specific steps are as follows:

[0019] S1: the vulcanizing machine drives the top die to rise, and the top die drives the upper die to rise;

[0020] S2: the upper die drives the inclined guide pillar to rise, and the upper die is separated from the middle die;

[0021] S3: the inclined guide pillar pushes the middle die of the middle die to move outward, so as to realize the separation of the middle die;

[0022] S4: the waistband steel ring is put in, and the waistband steel ring is placed on the positioning step, and the waistband steel ring is coarsely positioned;

[0023] S5: the upper die moves down, the inclined guide pillar makes the middle die petal die close in horizontal direction, and the waistband steel ring completes fine positioning;

[0024] S6: the upper die continues to move down, and the cooperation taper surface of the upper die and the middle die completes subsequent mold closing action;

[0025] S7: put in the blastocyst;

[0026] S8: the top die moves down, and vulcanization is performed again.

[0027] The present application has the following beneficial effects:

[0028] 1. A positioning step is arranged at one end of the bottom die towards the middle die, the waistband steel ring is placed on the positioning step before mold closing, and the positioning step can coarsely position the waistband steel ring; in combination with the combined design of the inclined guide pillar and the petal die, the middle die is closed under the action of the inclined guide pillar to automatically center the waistband steel ring. Although the positioning step has a simple structure, it is combined with the structural characteristics of the inclined guide pillar and the petal die, and the precise positioning of the waistband steel ring can be realized by simple design, and the automatic positioning of the waistband steel ring is integrated into the automatic positioning steps of other parts of the mold.

[0029] 2. The angle difference between the inclined guide pillar and the draft angle is arranged to realize sequential mold opening and closing, specifically: in the mold opening process, the upper die and the middle die are first separated, and then the inclined guide pillar drives the middle die petal die to move to realize petal die separation. In the mold closing process, the inclined guide pillar first plays a role in closing the middle die petal die, and then relies on the cooperation taper surface of the upper die and the middle die to complete subsequent mold closing action.

[0030] 3. The edge pressing strip is arranged to limit the petal die (middle die) to move only in the horizontal direction when the petal die is automatically opened, solve the technical problem that the middle die will move up with the upper die due to the viscosity of the rubber, and create necessary conditions for the automatic separation of the middle die petal die in the horizontal direction and the air bag product. BRIEF DESCRIPTION OF DRAWINGS

[0031] The drawings accompanying the specification of this application form a part hereof, serve to provide further understanding of the application, and together with the description of the preferred embodiments explain the application. In the drawings:

[0032] Figure 1 is a waistband type air bag structure diagram.

[0033] Figure 2 is a waistband type air spring air bag vulcanization automatic mold opening and closing structure diagram.

[0034] Figure 3 is a waistband type air spring air bag vulcanization automatic mold opening and closing structure diagram.

[0035] Figure 4 is Figure 3Enlarged view of point A shown.

[0036] Figure 5 This is a force analysis diagram of the inclined guide post.

[0037] Figure 6 This is an analysis diagram of the inclined guide post and draft angle.

[0038] Figure 7 This is a schematic diagram showing the positions of the pressure strip, upper mold, middle mold, and bottom mold.

[0039] Figure 8 This is a schematic diagram of the fit between the edge band and the middle mold.

[0040] Upper die-1, lower die-2, waist belt steel ring-3, top die-4, upper die-5, middle die-6, bottom die-7, inclined guide post-8, positioning boss-9, pressing strip-10, mating cone surface-11, protrusion-12, recessed structure-13, fastener-14. Detailed Implementation

[0041] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims. Example

[0042] Background art analysis shows that belt-type airbags have a belt steel ring. Existing automatic opening and closing molds cannot achieve automatic positioning of the belt steel ring. This application provides an automatic opening and closing mold for vulcanizing belt-type air springs, which can automatically position the belt steel ring, thereby achieving automatic opening and closing of the mold throughout the entire vulcanization process of the belt-type air spring. Details are as follows:

[0043] An automatic opening and closing mold for vulcanizing a belt-type air spring airbag, such as Figure 2 As shown, the system includes a top mold 4, an upper mold 5, a middle mold 6, a bottom mold 7, and inclined guide pillars 8. The middle mold 6 is composed of petal molds. There are at least two inclined guide pillars 8, which are evenly distributed circumferentially at the bottom of the upper mold 5. An inclined hole is formed in the middle mold 6. One end of each inclined guide pillar 8 is fixed to the bottom of the upper mold 5, and the other end is inserted into the inclined hole. A positioning step is provided at the end of the bottom mold 7 facing the middle mold 6. Before closing the mold, the waistband steel ring 3 is placed on the positioning step, which provides rough positioning for the waistband steel ring 3. The middle mold 6 closes under the action of the inclined guide pillars 8, automatically centering the waistband steel ring 3. Figure 4 The image shows a positioning step, which in this embodiment is a groove facing inwards.

[0044] This application's design, combining 8 inclined guide pillars and a petal mold (middle mold 6), utilizes the power of the vulcanizing machine's side cylinder to achieve horizontal and vertical demolding of the product. For example... Figure 5 As shown, the normal force applied by the inclined guide post 8 to the middle mold 6 is F. N F P For FN horizontal component force of the inclined guide pillar 8, F F F N vertical component force. When the mold is opened, the vertical component force of the inclined guide pillar 8 makes the inclined guide pillar 8 gradually separate from the middle mold 6, and the horizontal component force pushes the petal mold to separate.

[0045] The waistband air spring air bag described in the present application has a waistband steel ring 3. In order to realize full-automatic mold opening and closing, a positioning step is ingeniously arranged on the bottom mold 7. The positioning step is simple in structure, but it is combined with the structural characteristics of the inclined guide pillar 8 and the petal mold, and simple design can realize precise positioning of the waistband steel ring 3. Before the upper mold 5 and the middle mold 6 are closed, the waistband steel ring 3 is first placed on the positioning step of the bottom mold 7, and the waistband steel ring 3 completes rough positioning. Then the vulcanizing machine drives the top mold 4-upper mold 5-inclined guide pillar 8 to move downward, the inclined guide pillar 8 is inserted into the inclined hole of the middle mold 6, the horizontal component force of the inclined guide pillar 8 drives the petal mold to close, and the petal mold clamps the waistband steel ring 3 to complete precise positioning of the waistband steel ring 3. The present application integrates automatic positioning of the waistband steel ring 3 into the automatic positioning steps of other parts of the mold by arranging a simple positioning step.

[0046] As shown in Figure 6 , the angle between the inclined guide pillar 8 and the horizontal direction is A, the mold pulling angle of the upper mold 5 and the middle mold 6 is B, and the angle A is smaller than the angle B (angle difference), so that in the mold opening process, the upper mold 5 and the middle mold 6 are first separated, and then the inclined guide pillar 8 drives the middle mold 6 to move horizontally, so that the petal mold of the middle mold 6 is separated.

[0047] The design of the angle difference realizes sequential mold opening and closing. Specifically, in the mold opening process, the upper mold 5 and the middle mold 6 are first separated, and then the inclined guide pillar 8 drives the middle mold 6 petal mold to move horizontally by a distance S1, realizing the separation of the petal mold. In the mold closing process, the inclined guide pillar 8 first plays a role in closing the petal mold of the middle mold 6, and the inclined guide pillar 8 is disabled when the petal mold moves a distance S1, and then the subsequent mold closing action is completed by relying on the cooperation of the conical surface 11 of the upper mold 5 and the middle mold 6. As shown in Figure 6 , S0 is the horizontal travel of the petal mold of the middle mold 6, S1 is the pulling distance of the inclined guide pillar 8, and S1<S0.

[0048] The inclined guide pillar 8 and the inclined hole have a gap, but the inclined guide pillar 8 and the inclined hole have a contact force position. Such arrangement is convenient for the inclined guide pillar 8 to extend into the inclined hole during mold closing, and is also convenient for the inclined guide pillar 8 to push the middle mold 6 to move during mold opening and closing. And the inclined guide pillar 8 and the upper mold 5 are connected in interference fit, which is convenient for installation.

[0049] As shown in Figure 2 , a circle of edge compression strips 10 is further arranged between the upper mold 5 and the bottom mold 7. The edge compression strip 10 is fixed with the bottom mold 7, and a circle of grooves is opened on the side of the edge compression strip 10 facing the middle mold 6, as shown in Figure 8As shown, a ring of protrusions 12 is provided on the middle mold 6, and the protrusions 12 extend into the recessed structure 13; the height of the protrusions 12 is adapted to the recessed structure 13.

[0050] like Figure 7 As shown, the cross-section of the pressing strip 10 is "7"-shaped; one end of the "7"-shaped pressing strip 10 is fixed to the bottom mold 7, and the other end faces the middle mold 6, thus forming the recessed structure. The pressing strip 10 is connected to the bottom mold 7 by bolts 14. The pressing strip 10 is fixedly connected to the bottom mold 7, but there is a gap between the pressing strip 10 and the upper mold 5. The pressing strip 10 is positioned on the middle mold 6 by a countersunk platform and is also connected by bolts 14. The gap between the pressing strip 10 and the upper mold 5 facilitates the maintenance and replacement of the pressing strip 10.

[0051] This invention incorporates a pressure strip 10 to restrict the movement of the middle mold (6) to the horizontal direction only when the middle mold (6) automatically opens, thus solving the technical problem in the prior art where the middle mold 6 moves upward with the upper mold 5 due to the adhesive properties of the glue. Furthermore, the pressure strip 10 prevents the middle mold from expanding during mold opening, thus avoiding deformation of the inclined guide post 8, and also prevents uneven phenomena such as vibration and creep that may occur during the horizontal movement of the middle mold.

[0052] The specific steps of the sequential opening and closing method for the automatic opening and closing mold of the belt-type air spring airbag vulcanization mold described above are as follows:

[0053] S1: The vulcanizing machine drives the top mold 4 to rise, and the top mold 4 drives the upper mold 5 to rise;

[0054] S2: The upper mold 5 drives the inclined guide post 8 to rise, and the upper mold 5 separates from the middle mold 6;

[0055] S3: The inclined guide post 8 pushes the middle mold 6 of the valve mold to move outward, thereby realizing the separation of the valve mold;

[0056] S4: Insert the waist belt steel ring 3 and place the waist belt steel ring 3 on the positioning step to complete the rough positioning of the waist belt steel ring 3;

[0057] S5: The upper mold 5 moves downward, the inclined guide post 8 causes the petals of the middle mold 6 to close horizontally, and at the same time the waist belt steel ring 3 completes precise positioning;

[0058] S6: The upper mold 5 continues to move downward, and the mating cone surface 11 of the upper mold 5 and the middle mold 6 completes the subsequent mold closing action;

[0059] S7: Insert the blastocyst;

[0060] S8: The top mold 4 is moved down, and vulcanization is then carried out.

[0061] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. An automatic opening and closing mold for vulcanizing a belt-type air spring airbag, comprising a top mold, an upper mold, a middle mold, a bottom mold, and inclined guide pillars, wherein the middle mold is composed of petal molds, and the number of inclined guide pillars is at least two, the inclined guide pillars being evenly arranged circumferentially at the bottom of the upper mold; an inclined hole is formed in the middle mold, one end of the inclined guide pillar is fixed to the bottom of the upper mold, and the other end is inserted into the inclined hole; characterized in that, A positioning step is provided at the end of the bottom mold facing the middle mold. Before mold closing, the waist belt steel ring is placed on the positioning step, which can provide rough positioning for the waist belt steel ring. The middle mold closes under the action of the inclined guide post, causing the waist belt steel ring to automatically center. The angle between the inclined guide post and the horizontal direction is A, and the draft angle between the upper mold and the middle mold is B. Angle A is less than angle B, so that during the mold opening process, the upper mold and the middle mold separate first, and then the inclined guide post drives the middle mold to move horizontally, causing the middle mold segment membrane to separate. The inclined guide post and the horizontal guide post... There is a gap between the inclined holes, but the inclined guide post has a contact force position with the inclined hole; a ring of pressing strip is also provided between the upper mold and the bottom mold. The pressing strip is fixed to the bottom mold. A groove is opened on the side of the pressing strip facing the middle mold. A ring of protrusion is provided on the middle mold. The protrusion extends into the recessed structure. The height of the protrusion is adapted to the recessed structure. The cross-section of the pressing strip is "7" shaped. One end of the "7" shaped pressing strip is fixed to the bottom mold, and the other end faces the middle mold, thereby forming the recessed structure.

2. The automatic opening and closing mold for vulcanization of the belt-type air spring airbag according to claim 1, characterized in that, The pressing strip is connected to the bottom mold by bolts.

3. The automatic opening and closing mold for vulcanization of the belt-type air spring airbag according to claim 1, characterized in that, The pressing strip is fixedly connected to the bottom mold, but there is a gap between the pressing strip and the upper mold.

4. The automatic opening and closing mold for vulcanization of the belt-type air spring airbag according to claim 1, characterized in that, The inclined guide post is connected to the upper mold with an interference fit.

5. A sequential opening and closing method for using the automatic opening and closing mold for vulcanizing a belt-type air spring airbag as described in any one of claims 1 to 4, characterized in that, The specific steps are as follows: S1: The vulcanizing machine drives the top mold to rise, and the top mold drives the upper mold to rise; S2: The upper mold drives the inclined guide post to rise, and the upper mold separates from the middle mold; S3: The inclined guide post pushes the middle mold of the petal mold to move outward, thereby realizing the separation of the petal mold; S4: Insert the waist belt steel ring and place it on the positioning step to complete the rough positioning of the waist belt steel ring; S5: The upper mold moves downward, the inclined guide post causes the petals of the middle mold to close horizontally, and at the same time the waist belt steel ring completes precise positioning; S6: The upper mold continues to move downwards, and the mating conical surface of the upper mold and the middle mold completes the subsequent mold closing action; S7: Insert the blastocyst; S8: The top mold moves down and vulcanization is then carried out.

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