Waistband type air spring airbag vulcanization automatic opening and closing mold and sequential opening and closing mold method

Abstract

The invention provides a belt type air spring airbag vulcanization automatic opening and closing mold and a sequential opening and closing method, the belt type air spring airbag vulcanization automatic opening and closing mold comprises a top mold, an upper mold, a middle mold, a bottom mold and at least two inclined guide columns, the middle mold is composed of petal molds, and the inclined guide columns are circumferentially and uniformly arranged at the bottom of the upper mold; one end of the inclined guide pillar is fixed with the bottom of the upper die, and the other end of the inclined guide pillar is inserted into the inclined hole; a positioning step is arranged at the end, facing the middle die, of the bottom die, a waistband steel ring is placed on the positioning step before die assembly, and the waistband steel ring can be roughly positioned through the positioning step; and the middle die is folded under the action of the inclined guide pillar to enable the waistband steel ring to be automatically centered. Although the positioning step is simple in structure, the accurate positioning of the waistband steel ring can be realized through the simple design by combining the structural characteristics of the inclined guide post and the petal die, and the automatic positioning of the waistband steel ring is integrated into the automatic positioning step of other parts of the die.

Description

Technical Field

[0001] The invention relates to the technical field of molds, and more specifically to an automatic opening and closing mold for vulcanization of a belt-type air spring airbag and a sequential opening and closing mold method. Background Art

[0002] Rail transit vehicles are widely used around the world due to their strong carrying capacity and low overall cost. Air springs have the advantages of strong carrying capacity, stable natural frequency, strong deformation ability, and can maintain the height of the vehicle body unchanged through the use of control devices. They are widely used in trunk passenger cars, EMUs, and urban rail vehicles. The air spring airbag is an important load-bearing component of the air spring system. The compressibility of the high-pressure air in the airbag is used to achieve the effect of vibration reduction. The vulcanization of the airbag is an important manufacturing process that must be carried out, and the vulcanization mold and process are the basic guarantee for the realization of airbag products.

[0003] The main feature of the belt-type airbag structure is that there is a belt steel ring belt at the maximum outer diameter of the airbag, the diameter of the airbag opening is slightly different from the maximum outer diameter, and the upper and lower opening diameters of most airbags are the same or similar. The belt-type airbag can effectively control the expansion of the airbag and the parameter changes of other characteristics, and can withstand a large load with a smaller outer size to avoid interference with the car body and bogie. At the same time, the belt structure on the airbag can also effectively restrict the expansion of the outer diameter of the airbag in the inflated state and reduce the tensile stress of the surface rubber. The belt-type air spring has the advantages of large bearing capacity, high safety multiple, and small installation space, and has been widely used in subways and large railways.

[0004] The belt-type air spring consists of an upper cover plate, an airbag, a rubber pile, a support seat, a buckle, etc. The airbag is formed by multiple layers of rubber, cord fabric and belt steel rings. After vulcanization, the separation of the product from the mold cavity requires manual assistance. Therefore, how to realize the automatic opening and closing of the belt-type airbag product is a technical difficulty in the mold of this type of product.

[0005] The utility model patent with the publication number CN206855904U and the name of the injection mold of automobile air spring accessories includes a panel, an upper mold, a bottom mold, an inclined guide column, a slide, and a bottom plate. A gate sleeve is connected to the middle of the upper end of the panel, and the gate sleeve is connected to the flow channel on the mold. The upper end of the upper mold is connected to the panel through two symmetrically arranged inclined guide columns. The position between the two inclined guide columns on the upper mold is connected to the upper mold insert. The two inclined guide columns are arranged in an eight-shaped shape. The ends of the inclined guide columns extend into the bottom mold. The bottom mold is located below the upper mold. The bottom mold has a bottom mold insert corresponding to the upper mold insert. A slide is provided between the bottom mold and the upper mold. A square iron and a support head supported on the bottom plate are provided below the bottom mold. The bottom plate is connected to a bottom needle plate, and a surface needle plate is connected above the bottom needle plate. Compared with the prior art, the utility model provides a brand-new mold with reasonable design, simple structure, stable and reliable mold opening movement, long service life, and good product quality produced by the mold.

[0006] The patent can realize automatic mold opening and closing, and its mold opening method is applicable to the injection mold of automobile air spring accessories. Its vulcanization process is injection process, and the product is pure rubber. The waist belt airbag product described in this application also has a waist belt steel ring belt. When closing the mold, the positioning of the waist belt steel ring must also be considered. 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] There is a common technical problem when pouring (vulcanizing) the airbag of the air spring. There are many densely packed air holes on the mold. When demolding, there will be a lot of rubber whiskers. When the upper mold moves up, due to the stickiness of the rubber whiskers, the middle mold will move up with the upper mold, affecting the mold opening. Summary of the invention

[0008] The invention provides an automatic opening and closing mold for vulcanization of a waistband type air spring airbag and a sequential opening and closing mold method. The mold can automatically position a waistband steel ring, and an upper mold and a middle mold can be opened sequentially when the upper mold moves upward.

[0009] The above-mentioned purpose of the present invention is achieved by the following technical solutions: A waist-belt type air spring airbag vulcanization automatic opening and closing mold comprises a top mold, an upper mold, a middle mold, a bottom mold and inclined guide pillars, wherein the middle mold is composed of a petal mold, and the number of the inclined guide pillars is at least two, and the inclined guide pillars are evenly arranged at the bottom of the upper mold in the circumferential direction; an inclined hole is opened on 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; a positioning step is arranged at one end of the bottom mold facing the middle mold, and a waist belt steel ring is placed on the positioning step before closing the mold, and the positioning step can roughly position the waist belt steel ring; the middle mold is closed under the action of the inclined guide pillar to automatically center the waist belt steel ring.

[0010] The middle mold is composed of flap molds, which means that the middle mold is composed of a plurality of flap molds combined along the circumferential direction.

[0011] Furthermore, the angle between the inclined guide column and the horizontal direction is A, the draft angle between the upper mold and the middle mold is B, and the angle A is smaller than the angle B, so that during the mold opening process, the upper mold and the middle mold are separated first, and then the inclined guide column drives the middle mold to move horizontally, so that the middle mold valves are separated. The design of the angle difference realizes sequential mold opening and closing.

[0012] Furthermore, a circle of edge pressing strip is arranged between the upper mold and the bottom mold, the edge pressing strip is fixed to the bottom mold, a circle of groove is opened on the side of the edge pressing strip facing the middle mold, and a circle of protrusions is arranged on the middle mold, the protrusions extend into the recessed structure; the height of the protrusions is adapted to the recessed structure.

[0013] The present invention provides a pressure strip to limit the flap mold to move only in the horizontal direction when the flap mold (middle mold) is automatically opened, solving the technical problem in the prior art that the middle mold moves up with the upper mold when the upper mold moves up due to the viscosity of the adhesive whisker. In addition, the pressure strip is provided to avoid deformation of the inclined guide column caused by the flap mold opening at the moment of mold opening, as well as vibration, creeping and other uneven phenomena that may occur during the horizontal movement of the flap mold.

[0014] Furthermore, the cross section of the edge pressing strip is in the shape of a "7"; one end of the "7"-shaped edge pressing strip is fixed to the bottom mold, and the other end faces the middle mold, thereby forming the recessed structure.

[0015] Furthermore, the edge pressing strip is connected to the bottom mold by bolts.

[0016] Furthermore, the edge pressing strip is fixedly connected to the bottom mold, but there is a gap between the edge pressing strip and the upper mold. The edge pressing strip is positioned on the center mold by a sink and connected by bolts, and there is a gap between the edge pressing strip and the upper mold. This arrangement facilitates the maintenance and replacement of the edge pressing strip.

[0017] A sequential mold opening and closing method using the above-mentioned belt-type air spring airbag vulcanization automatic mold opening and closing mold, characterized in that the specific steps are as follows: S1: The vulcanizer drives the top mold to rise, and the top mold drives the upper mold to rise; S2: the upper die drives the inclined guide pillar to rise, and the upper die is separated from the middle die; S3: The inclined guide pillar pushes the center mold of the flap mold to move outward to separate the flap molds; S4: insert the waistband steel ring, place the waistband steel ring on the positioning step, and complete the rough positioning of the waistband steel ring; S5: the upper mold moves downward, the inclined guide pillar closes the middle mold halves in the horizontal direction, and the waistband steel ring is precisely positioned; S6: the upper die continues to move downward, and the matching conical surfaces of the upper die and the middle die complete the subsequent mold closing action; S7: insert blastocyst; S8: The top mold moves downward and then vulcanization is performed.

[0018] The present invention has the following beneficial effects: 1. A positioning step is set at the end of the bottom mold facing the middle mold. Before closing the mold, the belt steel ring is placed on the positioning step. The positioning step can roughly position the belt steel ring; combined with the combined design of the inclined guide column and the flap mold, the middle mold is closed under the action of the inclined guide column to automatically center the belt steel ring. Although the positioning step has a simple structure, it combines the structural characteristics of the inclined guide column and the flap mold. The simple design can achieve accurate positioning of the belt steel ring, and the automatic positioning of the belt steel ring is integrated into the automatic positioning steps of other parts of the mold.

[0019] 2. Set the angle difference between the inclined guide pin and the draft angle to achieve sequential mold opening and closing. Specifically, during the mold opening process, the upper mold and the middle mold are separated first, and then the inclined guide pin drives the mold water of the middle mold to move to achieve mold separation. During the mold closing process, the inclined guide pin first plays the role of closing the mold of the middle mold, and then relies on the matching cone surface of the upper mold and the middle mold to complete the subsequent mold closing action.

[0020] 3. A pressure strip is provided to limit the movement of the flap mold only in the horizontal direction when the flap mold (middle mold) is automatically opened, thereby solving the technical problem in the prior art that the middle mold moves upward with the upper mold due to the viscosity of the adhesive, and creating the necessary conditions for the automatic separation of the middle mold flap mold from the airbag product in the horizontal direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 This is a diagram of the structure of a belt-type airbag.

[0022] Figure 2 This is a structural diagram of the automatic opening and closing mold for vulcanization of a belt-type air spring airbag.

[0023] Figure 3 This is a partial structural diagram of the automatic opening and closing mold for vulcanization of a belt-type air spring airbag.

[0024] Figure 4 yes Figure 3 An enlarged view of point A is shown.

[0025] Figure 5 It is the force analysis diagram of the inclined guide column.

[0026] Figure 6 This is an analysis diagram of the inclined guide pin and draft angle.

[0027] Figure 7It is a schematic diagram of the position of the edge pressure strip and the upper mold, middle mold and bottom mold.

[0028] Figure 8 This is a schematic diagram of the coordination between the edge pressure strip and the middle mold.

[0029] Upper mouth-1, lower mouth-2, belt steel ring-3, top mold-4, upper mold-5, middle mold-6, bottom mold-7, inclined guide column-8, positioning boss-9, edge pressure strip-10, matching cone surface-11, protrusion-12, recessed structure-13, fastener-14. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are 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

[0031] From the analysis of the background technology, it can be known that the waist belt airbag has a waist belt steel ring. The automatic opening and closing mold of the existing technology cannot realize the automatic positioning of the waist belt steel ring. The present application provides a waist belt air spring airbag vulcanization automatic opening and closing mold, which can automatically position the waist belt steel ring, thereby realizing the automatic opening and closing of the mold during the whole process of vulcanization of the waist belt air spring airbag. The details are as follows: A belt-type air spring airbag vulcanization automatic opening and closing mold, such as Figure 2 As shown, it includes a top mold 4, an upper mold 5, a middle mold 6, a bottom mold 7 and an inclined guide column 8. The middle mold 6 is composed of a petal mold. The number of the inclined guide columns 8 is at least two, and the inclined guide columns 8 are evenly arranged at the bottom of the upper mold 5 in the circumferential direction; an inclined hole is opened on the middle mold 6, one end of the inclined guide column 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 set at the end of the bottom mold 7 facing the middle mold 6, and the waistband steel ring 3 is placed on the positioning step before closing the mold, and the positioning step can roughly position the waistband steel ring 3; the middle mold 6 is closed under the action of the inclined guide column 8 to automatically center the waistband steel ring 3. Figure 4 The figure shows a positioning step, and in this embodiment, the positioning step is a circle of grooves facing inward.

[0032] The combined design of the inclined guide column 8 and the flap mold (middle mold 6) of the present application uses the power of the oil cylinder on the side of the vulcanizer to realize horizontal and vertical demoulding of the product. Figure 5 As shown, the positive pressure applied by the inclined guide pin 8 to the middle mold 6 is F N , F P F N The horizontal component of force, F F F N Vertical force component: When the mold is opened, the vertical force component of the inclined guide pillar 8 causes the inclined guide pillar 8 to gradually separate from the middle mold 6, and the horizontal force component pushes the petal mold to separate.

[0033] The waist-belt type air spring airbag described in the present application has a waist-belt steel ring 3. In order to realize the full-process automated opening and closing of the mold, the present application cleverly sets a positioning step on the bottom mold 7. Although the positioning step has a simple structure, it is combined with the structural characteristics of the inclined guide column 8 and the petal mold. The simple design can realize the precise positioning of the waist-belt steel ring 3. Before the upper mold 5 and the middle mold 6 are molded together, the waist-belt steel ring 3 is first placed on the positioning step of the bottom mold 7, and the waist-belt steel ring 3 is roughly positioned. Then the vulcanizer drives the top mold 4-upper mold 5-inclined guide column 8 to move downward, and the inclined guide column 8 is inserted into the inclined hole of the middle mold 6. The horizontal force of the inclined guide column 8 drives the petal mold to close, and the petal mold clamps the waist-belt steel ring 3 to complete the precise positioning of the waist-belt steel ring 3. By setting a simple positioning step, the present application integrates the automatic positioning of the waist-belt steel ring 3 into the automatic positioning step of other parts of the mold.

[0034] like Figure 6 As shown, the angle between the inclined guide column 8 and the horizontal direction is A, the draft angle between 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 during the mold opening process, the upper mold 5 and the middle mold 6 are separated first, and then the inclined guide column 8 drives the middle mold 6 to move horizontally, so that the petals of the middle mold 6 are separated.

[0035] The design of the angle difference realizes sequential mold opening and closing. Specifically, during the mold opening process, the upper mold 5 and the middle mold 6 are separated first, and then the inclined guide pillar 8 drives the middle mold 6 to move horizontally by a distance S1 to separate the mold. During the mold closing process, the inclined guide pillar 8 first plays the role of closing the mold of the middle mold 6. The inclined guide pillar 8 fails when the mold moves by a distance S1, and then the subsequent mold closing action is completed by relying on the matching conical surface 11 of the upper mold 5 and the middle mold 6. Figure 6 As shown, S0 is the horizontal stroke of the 6-petal mold of the middle mold, S1 is the withdrawal distance of the inclined guide column 8, and S1<S0.

[0036] There is a gap between the inclined guide pin 8 and the inclined hole, but there is a contact force position between the inclined guide pin 8 and the inclined hole. This arrangement facilitates the inclined guide pin 8 to extend into the inclined hole when the mold is closed, and also facilitates the inclined guide pin 8 to push the middle mold 6 to move when the mold is opened and closed. In addition, the inclined guide pin 8 is connected to the upper mold 5 by interference fit, which is convenient for installation.

[0037] like Figure 2 As shown, a circle of edge strips 10 are provided between the upper mold 5 and the bottom mold 7. The edge strips 10 are fixed to the bottom mold 7. A circle of grooves is formed on the side of the edge strips 10 facing the middle mold 6. Figure 8 As shown, a circle 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 .

[0038] like Figure 7As shown, the cross section of the edge clamping strip 10 is in the shape of a "7"; one end of the "7"-shaped edge clamping strip 10 is fixed to the bottom mold 7, and the other end faces the middle mold 6, thereby forming the concave structure. The edge clamping strip 10 is connected to the bottom mold 7 by bolts 14. The edge clamping strip 10 is fixedly connected to the bottom mold 7, but there is a gap between the edge clamping strip 10 and the upper mold 5. The edge clamping strip 10 is positioned on the middle mold 6 by a sink, and is connected by bolts 14. There is a gap between the edge clamping strip 10 and the upper mold 5. This arrangement facilitates the maintenance and replacement of the edge clamping strip 10.

[0039] The present invention provides a pressure strip 10 to limit the flap mold to move only in the horizontal direction when the flap mold (middle mold 6) is automatically opened, solving the technical problem of the prior art that the middle mold 6 moves upward with the upper mold 5 due to the adhesive beard. In addition, the pressure strip 10 is provided to avoid deformation of the inclined guide pillar 8 caused by the flap mold opening at the moment of mold opening, and vibration, creeping and other uneven phenomena that may occur during the horizontal movement of the flap mold.

[0040] The specific steps of the sequential mold opening and closing method of the belt-type air spring airbag vulcanization automatic mold opening and closing method are as follows: S1: The vulcanizer drives the top mold 4 to rise, and the top mold 4 drives the upper mold 5 to rise; S2: The upper mold 5 drives the inclined guide pillar 8 to rise, and the upper mold 5 is separated from the middle mold 6; S3: The inclined guide pillar 8 pushes the middle mold 6 of the flap mold to move outward to achieve the separation of the flap mold; S4: insert the waistband steel ring 3, place the waistband steel ring 3 on the positioning step, and complete the rough positioning of the waistband steel ring 3; S5: the upper mold 5 moves downward, the inclined guide pillars 8 close the petals of the middle mold 6 in the horizontal direction, and the waistband steel ring 3 is precisely positioned; S6: the upper mold 5 continues to move downward, and the matching conical surface 11 of the upper mold 5 and the middle mold 6 completes the subsequent mold closing action; S7: insert blastocyst; S8: The top mold 4 moves downward and then vulcanization is performed.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention.

Claims

1. A belt-type air spring airbag vulcanization automatic opening and closing mold, comprising a top mold, an upper mold, a middle mold, a bottom mold and an inclined guide column, wherein the middle mold is composed of a petal mold, the number of the inclined guide columns is at least two, and the inclined guide columns are evenly arranged at the bottom of the upper mold in the circumferential direction; 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; characterized in that A positioning step is provided at one end of the bottom mold toward the middle mold. Before closing the mold, the belt steel ring is placed on the positioning step. The positioning step can roughly position the belt steel ring; the middle mold is closed under the action of the inclined guide column to automatically center the belt steel ring.

2. The belt-type air spring airbag vulcanization automatic opening and closing mold according to claim 1 is characterized in that: The angle between the inclined guide column and the horizontal direction is A, the draft angle between the upper mold and the middle mold is B, and the angle A is smaller than the angle B, so that during the mold opening process, the upper mold and the middle mold are separated first, and then the inclined guide column drives the middle mold to move horizontally, so that the middle mold valves are separated.

3. The belt-type air spring airbag vulcanization automatic opening and closing mold according to claim 2 is characterized in that: There is a gap between the inclined guide column and the inclined hole, but there is a contact force position between the inclined guide column and the inclined hole.

4. The belt-type air spring airbag vulcanization automatic opening and closing mold according to claim 1, characterized in that: A circle of edge pressing strip is also arranged between the upper mold and the bottom mold, the edge pressing strip is fixed to the bottom mold, a circle of groove is opened on the side of the edge pressing strip facing the middle mold, a circle of protrusions is arranged on the middle mold, the protrusions extend into the recessed structure; the height of the protrusions is adapted to the recessed structure.

5. The belt-type air spring airbag vulcanization automatic opening and closing mold according to claim 3 is characterized in that: The cross section of the edge pressing strip is in the shape of a "7"; one end of the "7"-shaped edge pressing strip is fixed to the bottom mold, and the other end faces the middle mold, thereby forming the concave structure.

6. The belt-type air spring airbag vulcanization automatic opening and closing mold according to claim 4, characterized in that: The edge pressing strip is connected to the bottom mold by bolts.

7. The belt-type air spring airbag vulcanization automatic opening and closing mold according to claim 5, characterized in that: The edge pressing strip is fixedly connected to the bottom mold, but there is a gap between the edge pressing strip and the upper mold.

8. The belt-type air spring airbag vulcanization automatic opening and closing mold according to claim 1, characterized in that: The inclined guide pillar is connected to the upper die by interference fit.

9. A sequential mold opening and closing method using the belt-type air spring airbag vulcanization automatic mold opening and closing mold according to any one of claims 1 to 8, characterized in that: The specific steps are as follows: S1: The vulcanizer drives the top mold to rise, and the top mold drives the upper mold to rise; S2: the upper die drives the inclined guide pillar to rise, and the upper die is separated from the middle die; S3: The inclined guide pillar pushes the center mold of the flap mold to move outward to separate the flap molds; S4: insert the waistband steel ring, place the waistband steel ring on the positioning step, and complete the rough positioning of the waistband steel ring; S5: the upper mold moves downward, and the inclined guide pillars close the petals of the middle mold in the horizontal direction, while the waistband steel ring is precisely positioned; S6: the upper die continues to move downward, and the matching conical surfaces of the upper die and the middle die complete the subsequent mold closing action; S7: insert blastocyst; S8: The top mold moves downward and then vulcanization is performed.

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