Die for rubber-coated valve rod

Abstract

The utility model relates to a die for a rubber-coated valve rod. A rubber-coated valve rod is high in mold machining precision, if the size of the mold is not matched with the size of a metal framework, the phenomenon that a metal piece is damaged or a metal rubber-coated surface is deviated easily occurs, and the appearance and use of a product are affected; and as the rubber-coated valve rod has higher requirements on mold processing, the mold cavities of the product forming mold are fewer, and the production efficiency is low. The mold comprises an upper mold, a middle mold and a lower mold, a middle mold core is arranged in the middle mold, and a plurality of cavities are formed among the upper mold, the middle mold core, the middle mold and the lower mold; the contact faces of the middle mold core and the middle mold are matched through inclined faces, a plurality of limiting assemblies are arranged on the upper mold, and the mold matching faces are all arranged to be fillets. According to the utility model, the metal piece is not easy to damage, the metal glue-coated surface is not easy to deviate, and the production efficiency of the product is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould processing technical field, concretely relates to a mould of glue coating valve rod. BACKGROUND

[0002] Valve rod is the important component of valve, is used for transmission, is connected to the upper execution mechanism or handle, and is directly used for driving the valve core to move or rotate below, to realize the valve switch or regulating effect. Valve rod is not only the moving part, force part, but also the sealing part in the valve opening and closing process. At the same time, it is impacted and corroded by medium, and also rubs with packing.

[0003] Glue coating valve rod belongs to the sealing product of metal and rubber compound, wherein the outer diameter of each part of metal valve rod is different in size, and the size has fluctuation. The product is high in mould processing precision, if the mould size is not matched with the metal framework size, the phenomenon of damaging metal part or metal glue coating surface deviation is easy to occur, the appearance and use of product are affected, and because glue coating valve rod is high in mould processing requirement, the mould cavity of product forming mould is less, and production efficiency is low.

[0004] Therefore, a glue coating valve rod mould that is not easy to damage metal part, metal glue coating surface is not easy to deviate and is high in production efficiency is required. SUMMARY

[0005] The utility model discloses a kind of mould of glue coating valve rod, to at least solve the problems of existing glue coating valve rod mould easy to damage metal part, metal glue coating surface easy to deviate and low production efficiency.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0007] A mould of glue coating valve rod, comprising an upper die, a middle die and a lower die, a middle die core is arranged in the middle die, a plurality of cavities are formed between the upper die, the middle die core, the middle die and the lower die.

[0008] The contact surface of the middle die core and the middle die is matched with an inclined surface, a plurality of limiting components are arranged on the upper die, and the mold matching surface is arranged as a rounded corner.

[0009] Further, the upper die bottom is provided with two elongated and symmetrically arranged protrusions.

[0010] Further, the middle die core is of a symmetric structure and is provided at the top with two symmetric strip-shaped grooves.

[0011] Further, the middle die is provided at the top with a groove, the middle die core is arranged in the groove, and the strip-shaped groove of the middle die core and the protrusion of the upper die are respectively matched to form a pouring cavity.

[0012] Further, the vertical section of the middle mold core and the groove is inverted trapezoid.

[0013] Further, the middle mold core and the middle mold are respectively provided with a plurality of glue flow channels, and the glue flow channels of the middle mold core and the middle mold are communicated.

[0014] Further, the length of the middle mold core is greater than the length of the upper mold, the middle mold and the lower mold, and the left and right ends of the middle mold core extend outside the mold.

[0015] Further, the middle mold core is provided with a demolding groove at the bottom of the part outside the mold.

[0016] Further, the cavity is horizontally spaced between the two strip-shaped grooves.

[0017] Further, the limiting component is a conical positioning pin, which is respectively arranged at the four corners of the upper mold and penetrates the upper mold, the middle mold and the lower mold from top to bottom.

[0018] Compared with the prior art, the utility model has the advantages that:

[0019] 1. The utility model discloses a glue-coated valve rod mold, the middle mold core and the middle mold adopt inclined surface cooperation, and the four corners of the mold are respectively provided with conical positioning pins, through the double positioning of inclined surface cooperation and conical positioning pins, the cooperation precision of the mold is high, and the metal glue-coated surface is not easy to deviate.

[0020] 2. The mold structure is simple in design and easy to operate, the chamfered and rounded transition is used at the cooperation surface, so that the mold and metal elements are not scratched and hurt in the operation process, and the service life of the mold is improved.

[0021] 3. The utility model is provided with a plurality of cavities, through the multi-cavity structure, the production efficiency of products is greatly improved, a plurality of glue flow channels are arranged in the mold cavity, two glue-coated modes of injection and mold pressing can be selected according to the different mooney viscosities of glue materials, and the glue-coated modes are diversified.

[0022] 4. The mold structure is simple, the cooperation precision is high, the operability is strong, the product production efficiency is high, the qualified rate is high, and the service life of the mold is long, so that the use effect of the mold is good. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0024] Figure 1 is a top view of the present application;

[0025] Figure 2 is a side view of the present application;

[0026] Figure 3 is a top view of the middle mold core;

[0027] Figure 4 is Figure 3 A-A sectional view of the middle;

[0028] Figure 5 is Figure 3 B-B sectional view of the middle;

[0029] Figure 6 is a schematic view of the product plane;

[0030] indicated as:

[0031] 1-upper mold, 2-middle mold, 3-lower mold, 4-middle mold core, 5-cavity, 6-injection cavity, 7-gel flow channel, 8-demolding groove, 9-tapered surface positioning pin. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0033] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0034] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term '' install '' '' link '' '' connect '' '' set '' should do broad sense understanding, for example, can be fixed link, set, also can be detachable connection, set, or integrally connect, set, for ordinary skilled in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0035] Embodiment:

[0036] As Figure 1 And Figure 6 The utility model provides a glue valve rod's mould, and the mould whole is symmetrical structure, and the product produced is also symmetrical structure, and the utility model discloses upper die 1, middle die 2 and lower die 3, be provided with middle die core 4 in middle die 2, and multiple cavities 5 are formed between upper die 1, middle die core 4, middle die 2 and lower die 3.

[0037] The contact surface of middle die core 4 and middle die 2 adopts bevel cooperation, upper die 1 is provided with multiple limiting assemblies, and the cooperation surface of mould is all rounded corner smooth transition, and the size of mould is greater than the upper limit size of valve rod cooperation part 0.05mm, to avoid scratching, bruising mould and metal element in the operation process, to improve the service life of mould.

[0038] Specifically, as Figure 2 Upper die 1 bottom is integrally provided with two elongated and along transverse center line symmetrical setting convex, and the transverse section of convex includes rectangle and arc at both ends of rectangle.

[0039] Middle die core 4 is symmetrical structure, and its top is provided with two along transverse center line symmetrical setting and with upper die 1 convex corresponding strip-shaped recess, and the size and shape of strip-shaped recess and convex are consistent.

[0040] Middle die 2 top is provided with recess, and middle die core 4 is embedded in recess, and the strip-shaped recess of middle die core 4 and the convex of upper die 1 are matched respectively, form injection cavity 6.

[0041] In the embodiment, as Figures 3-5 The vertical section of middle die core 4 and recess is all inverted trapezoidal, so that the contact surface of middle die core 4 and both sides of middle die 2 is bevel cooperation.

[0042] Middle die core 4 and middle die 2 are provided with several glue flow channels 7 respectively, and the glue flow channel 7 of middle die core 4 and the glue flow channel 7 of middle die 2 are communicated, and glue flow channel 7 is arranged in the inside of mould cavity, can select two kinds of glue coating mode of injection and mould pressing according to the different mooney viscosity of glue, if the flowability of glue is good, can adopt injection pressure form, if the flowability of glue is poor, glue flow channel 7 can also be part of glue flow groove, prevent glue too large, lead to product thickness out of tolerance.

[0043] The length of the middle mold core 4 is greater than the lengths of the upper mold 1, the middle mold 2 and the lower mold 3, the left and right ends of the middle mold core 4 respectively extend outside the mold, and each of the left and right ends is 8-10mm long, in the embodiment, each of the left and right ends of the middle mold core 4 is 9mm long, and the bottom of the part of the middle mold core 4 located outside the mold is provided with a demolding groove 8 to facilitate demolding, and the vertical section of the demolding groove 8 is rectangular.

[0044] In the embodiment, a plurality of cavities 5 are horizontally and equidistantly distributed between the two strip-shaped grooves, and a plurality of products can be produced in one processing, and the production efficiency of the products is improved by processing the mold into a multi-cavity mold structure.

[0045] The limiting assembly is a conical positioning pin 9, and the upper mold 1, the middle mold 2 and the lower mold 3 are all provided with positioning holes at the four corners, and the positioning holes are arranged in alignment, and the conical positioning pin 9 passes through the positioning holes on the upper mold 1, the middle mold 2 and the lower mold 3 in sequence from top to bottom to limit the mold, thereby ensuring the precision of the product.

[0046] In the embodiment, the conical positioning pin 9 and the slope are used for double positioning, so that the fitting precision of the mold is high, and the metal rubber-coated surface is not easy to deviate.

[0047] The mold structure of the embodiment is simple, the fitting precision is high, the operability is strong, the product production efficiency is high, the qualified rate is high, and the service life of the mold is long.

[0048] The use process of the embodiment is as follows:

[0049] 1. The metal rubber-coated surface is subjected to sandblasting treatment, and after treatment, solvent is selected to remove oil stains and impurities on the metal surface, and after drying, it is ready for use.

[0050] 2. According to the different types of glue, select the appropriate adhesive and evenly brush it on the sandblasted part, and after natural cooling and drying, it is ready for use.

[0051] 3. According to the different Mooney viscosities of the glue, two ways of injection and molding can be selected, the size of the semi-finished product for injection is: the length and width are slightly smaller than the length and width of the injection cavity 6, and the thickness is 4-4.5mm, and the size of the semi-finished product for molding is: the length is 44-45mm, the width is 4-4.2mm, and the thickness is 4.6-5mm.

[0052] 4. If it is an injection process, the semi-finished product is placed in the injection cavity, and if it is a molding process, the semi-finished product is placed in the skeleton rubber-coated position respectively, and then the mold is closed and pressed to vulcanize.

[0053] 5. After the product is vulcanized, the upper mold 1 is opened, and then the middle mold core 4 is taken out, and the product can be taken out.

[0054] The utility model is described above with specific examples, which is only used for helping to understand the utility model and does not limit the utility model. For the skilled in the art to which the utility model belongs, according to the idea of the utility model, a number of simple deductions, deformations or substitutions can be made.

Claims

1. A mold for a rubberized valve stem, comprising an upper mold (1), a middle mold (2) and a lower mold (3), characterized in that: The middle die (2) is provided with a middle die core (4), and a plurality of cavities (5) are formed between the upper die (1), the middle die core (4), the middle die (2) and the lower die (3). The contact surface of the middle die core (4) and the middle die (2) is matched with an inclined surface, and a plurality of limiting assemblies are arranged on the upper die (1), and the die matching surface is arranged as a rounded corner.

2. The glue-coated valve rod mold according to claim 1, characterized in that: The bottom of the upper die (1) is provided with two protrusions which are elongated and symmetrically arranged.

3. The glue-coated valve rod mold according to claim 2, characterized in that: The middle die core (4) is of a symmetric structure and is provided at the top with two symmetric strip-shaped grooves.

4. The glue-coated valve rod mold according to claim 3, characterized in that: The middle die (2) is provided at the top with a groove, the middle die core (4) is arranged in the groove, and the strip-shaped grooves of the middle die core (4) and the protrusions of the upper die (1) are matched respectively to form a material injection cavity (6).

5. The glue-coated valve rod mold according to claim 4, characterized in that: The vertical section of the middle die core (4) and the groove is an inverted trapezoid.

6. The glue-coated valve rod mold according to claim 1, characterized in that: The middle die core (4) and the middle die (2) are respectively provided with a plurality of glue flow channels (7), and the glue flow channels (7) of the middle die core (4) and the glue flow channels (7) of the middle die (2) are arranged in communication.

7. The glue-coated valve rod mold according to claim 1, characterized in that: The length of the middle die core (4) is greater than the length of the upper die (1), the middle die (2) and the lower die (3), and the left and right ends of the middle die core (4) extend to the outside of the mold.

8. The glue-coated valve rod mold according to claim 7, characterized in that: The bottom of the part of the middle die core (4) located on the outside of the mold is provided with a demolding groove (8).

9. The glue-coated valve rod mold according to claim 3, characterized in that: The cavities (5) are horizontally spaced and arranged between the two strip-shaped grooves.

10. The glue-coated valve rod mold according to claim 1, characterized in that: The limiting assemblies are taper locating pins (9) which are arranged at the four corners of the upper die (1) and sequentially penetrate the upper die (1), the middle die (2) and the lower die (3) from top to bottom.

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