Injection mold for PU wheel with metal hub

Abstract

The utility model discloses an injection mold for a metal hub PU (polyurethane) wheel, which comprises a movable mold bottom plate assembly, a movable mold core and a fixed mold bottom plate assembly, a mold frame is arranged between the movable mold bottom plate assembly and the fixed mold bottom plate assembly, a stop block is arranged between the mold frame and the fixed mold bottom plate assembly, and the movable mold core is arranged on the movable mold bottom plate assembly. Three mold core mounting fixing bolts are arranged on the side edge of the movable mold core, the movable mold core wraps the outer portion of the PU wheel pouring cavity, and the PU wheel pouring cavity is communicated with the sprue. According to the injection mold for the metal hub PU wheel, after the PU wheel is subjected to injection molding and cooling molding, controllable air flow can be used for blowing out the PU wheel from the interior of the molding cavity, so that the PU wheel is prevented from being damaged, and the service life of the PU wheel is prolonged. And the efficiency is high, the controllability is good, deformation and damage of the PU wheel can be avoided, and the machining quality and efficiency of injection molding of the PU wheel are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to PU wheel injection mold field, concretely is a kind of for metal hub PU wheel injection mold. BACKGROUND

[0002] PU wheel is also called polyurethane wheel, it is tire made of polyurethane (PolyUrethane, for short PU) material.Polyurethane is a kind of high polymer material, with high elasticity, wear resistance, tear resistance and impact resistance etc., so the wheel made of PU material has elasticity, shock-absorbing effect is even better than pneumatic wheel, good grip, not easy to slip, more wear-resistant, good comfort performance, in sports product class, such as drift board, power board, skate, twist car etc. some sports and leisure products that young friends favour, have wide application.

[0003] At present, PU wheel usually adopts pouring mode, is processed into shape using injection mold, for example, the specific content of the Chinese patent with application No. CN201520850619.1 is: a kind of for metal hub PU wheel injection mold, upper die cover is combined on lower die to form a cavity for forming metal hub PU wheel, potting frame is set on the mold body for potting fixation.In the practical application of the above patent, PU wheel is difficult to take out from mold after cooling and forming, and PU wheel is easily deformed, which reduces the production quality of PU wheel. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of for metal hub PU wheel injection mold, to solve the problem that the existing PU wheel injection molding mold in the above background technology is difficult to demould when taking out hot PU wheel, easily leading to PU wheel deformation, reduces the production quality of PU wheel.

[0005] The technical scheme of the utility model is realized as follows: a kind of for metal hub PU wheel injection mold, including movable die bottom plate assembly, movable die core and fixed die bottom plate assembly, the movable die bottom plate assembly with the fixed die bottom plate assembly between being provided with mold frame, the mold frame with the fixed die bottom plate assembly between being provided with stop block, the side of movable die core is provided with three core installation fixed bolt, the movable die core is wrapped in the outside of PU wheel pouring cavity, the PU wheel pouring cavity is communicated with nipple;

[0006] The PU wheel pouring cavity includes ring forming cavity, the ring forming cavity is provided with a plurality of jetting unloading holes on ring circumference, the jetting unloading hole is communicated with gas guide nozzle, a layer of high-temperature-resistant, breathable and waterproof membrane is laid in the jetting unloading hole.

[0007] Preferably, the core installation fixed bolt with the movable die core between being provided with core fixing plate.

[0008] Preferably, the exterior of the spout is provided with a positioning ring.

[0009] Preferably, the interior of the mold frame is provided with two guide columns, and the exterior of the guide columns is sleeved with a demolding spring column.

[0010] Preferably, the air jet discharge holes are uniformly arranged on the circumference of the ring forming cavity, and the cross-sectional shape of the air jet discharge holes is consistent with the ring forming cavity.

[0011] Preferably, the air guide nozzle is connected with a demolding liquid supply device.

[0012] With the above technical scheme, the beneficial effects of the utility model are as follows:

[0013] The injection mold for the PU wheel of the metal wheel hub can blow out the PU wheel from the forming cavity by using controllable air flow after the PU wheel is injection molded and cooled and formed, which is not only high in efficiency and good in controllability, but also can avoid deformation and damage of the PU wheel, and improves the processing quality and efficiency of the PU wheel injection molding. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0015] Figure 1 It is a partial sectional view in the front view state of the utility model;

[0016] Figure 2 It is Figure 1 The bottom view;

[0017] Figure 3 It is an end face enlarged view of the PU wheel pouring cavity of the utility model.

[0018] 1, moving die bottom plate assembly; 2, core mounting fixing bolt; 3, moving core; 4, air guide nozzle; 5, core fixing plate; 6, fixed die bottom plate assembly; 7, positioning ring; 8, spout; 9, stop block; 10, PU wheel pouring cavity; 11, guide column; 12, mold frame; 13, demolding spring column; 1001, ring forming cavity; 1002, air jet discharge hole; 1003, high-temperature-resistant, breathable and waterproof membrane. DETAILED DESCRIPTION

[0019] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0020] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. Figures 1-3 A kind of injection mold for metal wheel hub PU wheel, including movable die base assembly 1, movable die core 3 and fixed die base assembly 6, movable die base assembly 1 with fixed die base assembly 6 between being provided with mold frame 12, mold frame 12 with fixed die base assembly 6 between being provided with stopper 9, the side of movable die core 3 is provided with three core installation fixed bolt 2, movable die core 3 is wrapped in the outside of PU wheel pouring cavity 10, PU wheel pouring cavity 10 is communicated with nipple 8;

[0021] PU wheel pouring cavity 10 includes ring forming cavity 1001, ring forming cavity 1001 is provided with multiple jet discharge hole 1002 on circumference, jet discharge hole 1002 is communicated with air guide nozzle 4, jet discharge hole 1002 is internally laid with a layer of high-temperature-resistant, breathable waterproof membrane 1003.

[0022] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. Figure 2 Core fixing plate 5 is provided between core installation fixed bolt 2 and movable die core 3, so that the contact area between core installation fixed bolt 2 and movable die core 3 can be increased by using core fixing plate 5, thereby increasing the stability of movable die core 3.

[0023] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. Figure 1 The outside of nipple 8 is provided with a circle of positioning ring 7, so that the positioning and fixing effect of PU solution can be provided by using positioning ring 7, to avoid pouring equipment sliding and offsetting during pouring.

[0024] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. Figure 1 Two guide columns 11 are provided inside mold frame 12, and demolding spring column 13 is installed outside guide column 11, so that the purpose of separating movable die base assembly 1 and fixed die base assembly 6 can be realized by using guide column 11 and demolding spring column 13, in cooperation with the push rod and pull rod in the injection mold.

[0025] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. Figure 3 Jet discharge hole 1002 is uniformly surrounded on the circumference of ring forming cavity 1001, and the cross-sectional shape of jet discharge hole 1002 is consistent with that of ring forming cavity 1001, so that the shape of PU wheel after cooling and forming can be guaranteed to meet the standard, and PU wheel can be demolded by using the common pushing of multiple stations.

[0026] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. Figure 1 AndFigure 2 The air guide nozzle 4 is connected with the demolding liquid supply device, and the demolding liquid has greater momentum than air at the same flow rate, and the demolding effect is more remarkable.

[0027] Working principle: when the injection mold is used, under the cooperation of the movable mold base assembly 1 and the fixed mold base assembly 6, the external pouring device can inject the plastic solution into the pouring cavity 10 through the spout 8, and the plastic solution in the pouring cavity 10 is rapidly cooled and formed into a pouring PU wheel product under cooling, and then the movable mold base assembly 1 and the fixed mold base assembly 6 are separated by the push rod and the pull rod in the injection mold, high-pressure air is injected through the air guide nozzle 4, and a controllable high-speed air flow is blown out through the air injection demolding hole 1002, so that the plastic pouring PU wheel product can be demolded from the pouring cavity 10, and in this process, the PU wheel is blown out of the forming cavity by the controllable air flow, compared with the existing demolding method, the efficiency is high, the controllability is good, and the PU wheel deformation and damage can be avoided, and the processing quality and efficiency of the PU wheel injection molding are improved.

[0028] In the description of the present application, the terms "connection", "installation", "fixation", "arrangement" and the like are understood in a broad sense, for example, "connection" can be fixed connection or indirect through intermediate components without affecting the relationship between components and technical effects, or it can be integrated connection or partial connection, as the case may be for a person skilled in the art, the specific meaning of the above terms in the present application or utility model can be understood according to the specific circumstances, in the present application, the directions or position relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse" and "longitudinal" are based on the directions or position relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Finally, it should be noted that when describing the position of each component and the cooperation relationship between them, one pair of components is usually taken as an example, however, those skilled in the art should understand that such position, cooperation relationship, etc. are also applicable to other components / other pairs of components.

[0029] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An injection mold for a metal hub PU wheel, characterized by: Including the movable mold base assembly (1), the movable mold core (3) and the fixed mold base assembly (6), the movable mold base assembly (1) is provided with a mold frame (12) between the fixed mold base assembly (6), the mold frame (12) is provided with a stop block (9) between the fixed mold base assembly (6), the movable mold core (3) is provided with three core mounting fixed bolts (2) on the side, the movable mold core (3) is wrapped outside the PU wheel pouring cavity (10), the PU wheel pouring cavity (10) is communicated with the nipple (8); The PU wheel pouring cavity (10) includes a ring forming cavity (1001), a plurality of jet discharge holes (1002) are arranged on the circumference of the ring forming cavity (1001), the jet discharge holes (1002) are communicated with the air guide nozzle (4), and a layer of high-temperature-resistant, breathable and waterproof film (1003) is laid inside the jet discharge hole (1002).

2. The injection mold for a PU wheel of a metal wheel hub according to claim 1, characterized in that: The core fixing plate (5) is arranged between the core mounting fixed bolt (2) and the movable mold core (3).

3. The injection mold for a PU wheel of a metal wheel hub according to claim 1, characterized in that: A positioning ring (7) is arranged outside the nipple (8).

4. The injection mold for a metal hub PU wheel of claim 1, wherein: Two guide columns (11) are arranged inside the mold frame (12), and a demolding spring column (13) is arranged outside the guide column (11).

5. The injection mold for a metal wheel PU wheel of claim 1, wherein: The jet discharge holes (1002) are uniformly arranged on the circumference of the ring forming cavity (1001), and the cross-sectional shape of the jet discharge holes (1002) is consistent with that of the ring forming cavity (1001).

6. The injection mold for a metal wheel PU wheel of claim 1, wherein: The air guide nozzle (4) is communicated with the demolding liquid supply equipment.

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