Quick demolding anti-tearing mold structure

Abstract

The utility model aims to provide a quick demoulding anti-tearing mould structure, which comprises a movable mould plate and a contraction component, an arc-shaped raised line is arranged on the movable mould plate and is used for forming a clearance groove on a foaming outer layer, one end of the arc-shaped raised line far away from the movable mould plate is provided with a fillet part, one side surface of the movable mould plate far away from the arc-shaped raised line is provided with an insertion groove, and the insertion groove is provided with a groove. The contraction assembly comprises an insert and a sealing ring, a cooling groove is formed in the outer side wall of the insert, the insert is sleeved with the sealing ring, when the insert is inserted into the inserting groove, the sealing ring abuts against the inner side wall of the inserting groove, a cooling channel is defined by the inner side wall of the cooling groove and the inner side wall of the inserting groove, and the minimum linear distance between the cooling channel and the arc-shaped protruding strip ranges from 2 mm to 6 mm.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of mould, in particular to a quick demoulding anti-tearing mould structure. BACKGROUND

[0002] Foaming mould is a tool of injection molding, through filling foaming resin into the mould, making it melt by heating, forming gas-liquid saturated solution, through nucleation, forming a large number of small bubble nucleus, bubble nucleus growth, and then the foamed plastic part is obtained. At present, the steering wheel on the market is almost made by foaming mould.

[0003] With the development of automobile technology, as the component that the user contacts most with the automobile, in order to meet the personalized needs of the user, the automobile steering wheel as shown in the figure appears. Figure 5 The automobile steering wheel includes a metal frame and a foamed outer layer 21 wrapped outside the metal frame, wherein an empty slot 21a is arranged on the back side of the foamed outer layer 21, and the empty slot 21a is used for inserting the light bar.

[0004] However, compared with the smooth structure of the surface of the foamed outer layer 21 in the past, the automobile steering wheel has the irregular empty slot 21a on the back side of the foamed outer layer 21, which will cause the following problems when demoulding after injection molding: the automobile steering wheel is injection molded by the dynamic mode and the static mode to form a mold cavity, so the dynamic mode and the static mode are respectively provided with a half molding groove, and the two molding grooves are mutually buckled to jointly form a complete mold cavity. When the mold is opened, the dynamic mode is away from the static mode, and the molded automobile steering wheel is kept in the static mode, and when the dynamic mode is away from the static mode (the automobile steering wheel), the structure corresponding to the empty slot 21a on the dynamic mode will tear the inner bottom wall of the empty slot 21a, and the end of the empty slot 21a is a sharp corner structure 21b, so that the position where the sharp corner structure 21b and the empty slot 21a meet is easily torn, thereby causing the automobile steering wheel to be damaged. Therefore, in order to solve the above problems, the quick demoulding anti-tearing mould structure is provided. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at overcoming the defects in the prior art, providing a quick demoulding anti-tearing mould structure which can reduce the adhesion between the dynamic mode and the inner side wall of the empty slot, so that the automobile steering wheel can be smoothly separated from the dynamic mode, and the inner bottom wall of the empty slot is prevented from being torn.

[0006] The utility model aims at overcoming the defects in the prior art, providing a quick demoulding anti-tearing mould structure which can reduce the adhesion between the dynamic mode and the inner side wall of the empty slot, so that the automobile steering wheel can be smoothly separated from the dynamic mode, and the inner bottom wall of the empty slot is prevented from being torn.

[0007] The utility model relates to a quick demoulding anti-tearing mould structure, which comprises:

[0008] A movable mold plate is provided with an arc-shaped protrusion for forming a clearance groove on a foamed outer layer, an end of the arc-shaped protrusion away from the movable mold plate is provided as a rounded corner, and a slot is formed on a side of the movable mold plate away from the arc-shaped protrusion.

[0009] The shrink assembly comprises a block and a sealing ring, a cooling groove is formed on an outer sidewall of the block, the sealing ring is sleeved on the block, when the block is inserted into the slot, the sealing ring abuts against an inner sidewall of the slot, an inner sidewall of the cooling groove and the inner sidewall of the slot form a cooling channel, and the minimum straight-line distance between the cooling channel and the arc-shaped protrusion is 2-6 mm.

[0010] Optionally, water inlet holes and water outlet holes are formed on the movable mold plate, and two ends of the cooling channel are in communication with the water inlet holes and the water outlet holes, respectively.

[0011] Optionally, the cooling groove comprises an annular groove portion and two adjoining groove portions, the two adjoining groove portions are located on two sides of the block, respectively, the two adjoining groove portions are in communication with the water inlet holes and the water outlet holes, respectively, two ends of the annular groove portion are in communication with the two adjoining groove portions, respectively, the annular groove portion extends to one end of the block, and the sealing ring is located on a side of the adjoining groove portion away from the annular groove portion.

[0012] Optionally, a sealing groove is formed on the block, and the sealing ring is partially accommodated in the sealing groove.

[0013] Optionally, a positioning protrusion is arranged at an end of the block away from the cooling groove, a positioning slot is formed on the movable mold plate near an opening position of the slot, and the positioning protrusion is accommodated in the positioning slot in a fitting manner.

[0014] Optionally, the positioning protrusion and the block are in an integral molding structure.

[0015] Optionally, the rounded corner is R0.5-R2.

[0016] Optionally, the rounded corner is R0.8-R1.

[0017] Compared with the prior art, the utility model has at least the following advantages:

[0018] Therefore, by setting the end of the arc-shaped convex strip as a rounded structure, the inner bottom wall of the formed avoidance slot is correspondingly in a rounded structure, thereby enhancing the structural strength of the avoidance slot, and the arc-shaped convex strip is rapidly cooled at a local position by the cooling channel, so that the arc-shaped convex strip reliably falls off from the avoidance slot, and therefore, when the movable mold plate moves away from the automobile steering wheel, even if the arc-shaped convex strip briefly pulls the inner side wall of the avoidance slot, the inner bottom wall of the avoidance slot will not be torn, thereby improving the forming quality of the automobile steering wheel. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 FIG. 1 is a structural schematic diagram of a rapid demolding anti-tearing mold structure according to an embodiment of the present application;

[0021] Figure 2 FIG. 2 is a cross-sectional structural schematic diagram of the rapid demolding anti-tearing mold structure shown in FIG. 1; Figure 1

[0022] Figure 3 FIG. 3 is a cross-sectional structural schematic diagram of a movable mold plate according to an embodiment of the present application;

[0023] Figure 4 FIG. 4 is a structural schematic diagram of an arc-shaped convex strip according to an embodiment of the present application;

[0024] Figure 5 FIG. 5 is a structural schematic diagram of a contraction assembly according to an embodiment of the present application;

[0025] Figure 6 FIG. 6 is a structural schematic diagram of an automobile steering wheel according to an embodiment of the present application.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 21, foamed outer layer; 21a, avoidance slot; 21b, sharp corner structure; 10, rapid demolding anti-tearing mold structure; 110, movable mold plate; 200, contraction assembly; 120, arc-shaped convex strip; 121, rounded portion; 111, insertion slot; 210, insert block; 220, sealing ring; 211, cooling groove; 112, water inlet hole; 113, water outlet hole; 2111, annular groove portion; 2112, abutment groove portion; 212, sealing groove; 230, positioning protrusion; 114, positioning groove. DETAILED DESCRIPTION ​

[0028] For the convenience of understanding the utility model, the utility model will be described more fully below with reference to the relevant drawings. The drawings show the preferred embodiments of the utility model.

[0029] As shown in Figures 1 to 5 A quick demolding anti-tearing mold structure 10, including the moving die plate 110 and the shrinkage assembly 200, the moving die plate 110 is provided with arc convex strip 120, arc convex strip 120 is used to form the empty slot 21a on the foaming outer layer 21, arc convex strip 120 is provided with round angle part 121 away from the one end of moving die plate 110, the side face of moving die plate 110 away from arc convex strip 120 is set up and is inserted with slot 111, the shrinkage assembly 200 includes the insert block 210 and the sealing ring 220, the outside wall of insert block 210 is set up and is inserted with cooling groove 211, the sealing ring 220 is set up on insert block 210, when insert block 210 is inserted in slot 111, with sealing ring 220 abuts to the inner side wall of slot 111, and make the inner side wall of cooling groove 211 and the inner side wall of slot 111 enclose cooling channel, and the minimum straight line distance of cooling channel and arc convex strip 120 is 2mm-6mm.

[0030] It should be noted that the movable die is composed of a plurality of movable die plates 110, and the movable die plate 110 shown in the present application is only a structure for forming the air avoidance groove 21a, which is only part of the structure in the movable die. Further, the arc-shaped protrusion 120 is integrally formed with the movable die plate 110, and the end of the arc-shaped protrusion 120 away from the movable die plate 110, that is, the protruding part of the arc-shaped protrusion 120 is provided with a rounded corner 121. In this way, the inner bottom wall of the air avoidance groove 21a corresponding to the arc-shaped protrusion 120 is a rounded corner structure, so that when the movable die plate 110 is demolded to move away from the automobile steering wheel, the inner bottom wall of the air avoidance groove 21a has stronger toughness due to the rounded corner structure compared with a right angle structure. Further, a slot 111 is formed on the side of the movable die plate 110 away from the arc-shaped protrusion 120, wherein the slot 111 extends towards the arc-shaped protrusion 120, and the minimum straight line distance between the inner bottom wall of the slot 111 and the arc-shaped protrusion 120 is 2mm-6mm. A cooling groove 211 is formed on the outer side wall of the insert 210, and after the insert 210 is inserted into the slot 111, the inner side wall of the cooling groove 211 and the inner side wall of the slot 111 together form a cooling channel. In this way, by injecting cold water into the cooling channel, the distance between the cooling channel and the arc-shaped protrusion 120 is small, so that the local position of the arc-shaped protrusion 120 can be quickly cooled. In this way, due to the rapid cooling of the arc-shaped protrusion 120, the outer side wall of the arc-shaped protrusion 120 will be separated from the inner side wall of the air avoidance groove 21a of the foamed outer layer 21, so that when the movable die plate 110 moves away from the automobile steering wheel, the arc-shaped protrusion 120 will not be adhered to the air avoidance groove 21a. In this way, by setting the end of the arc-shaped protrusion 120 as a rounded corner structure, the inner bottom wall of the formed air avoidance groove 21a correspondingly has a rounded corner structure, thereby enhancing the structural strength of the air avoidance groove 21a. At the same time, the local position of the arc-shaped protrusion 120 is quickly cooled by the cooling channel, so that the arc-shaped protrusion 120 can be reliably separated from the air avoidance groove 21a. In this way, when the movable die plate 110 moves away from the automobile steering wheel, even if the arc-shaped protrusion 120 briefly pulls the inner side wall of the air avoidance groove 21a, it will not tear the inner bottom wall of the air avoidance groove 21a, thereby improving the forming quality of the automobile steering wheel.

[0031] As Figure 1 mentioned above, in an embodiment, the movable die plate 110 is further provided with a water inlet hole 112 and a water outlet hole 113, and the two ends of the cooling channel are respectively communicated with the water inlet hole 112 and the water outlet hole 113.

[0032] It should be noted that by injecting cold water into the water inlet hole 112, the cold water flows out from the water outlet hole 113 after passing through the cooling channel, so that the local position of the arc-shaped protrusion 120 is quickly cooled, and the arc-shaped protrusion 120 is quickly separated from the air avoidance groove 21a.

[0033] As Figure 2 and Figure 5As shown, in an embodiment, the cooling groove 211 comprises an annular groove portion 2111 and two adjoining groove portions 2112, the two adjoining groove portions 2112 are respectively located at two sides of the insert 210, the two adjoining groove portions 2112 are respectively communicated with the water inlet hole 112 and the water outlet hole 113, two ends of the annular groove portion 2111 are respectively communicated with the two adjoining groove portions 2112, and the annular groove portion 2111 extends to one end of the insert 210, and the sealing ring 220 is located on the side of the adjoining groove portion 2112 away from the annular groove portion 2111.

[0034] It should be noted that, in order to ensure the rapid cooling of the arc-shaped convex strip 120, the cooling groove 211 is arranged to surround the end of the insert 210, specifically, the water inlet hole 112 is communicated with one of the two adjoining groove portions 2112, the water outlet hole 113 is communicated with the other adjoining groove portion 2112, and the annular groove portion 2111 is located at the end of the insert 210, so that the annular groove portion 2111 is closest to the arc-shaped convex strip 120, and thus the cold water flows through the annular groove portion 2111 to rapidly cool the arc-shaped convex strip 120.

[0035] As shown in Figure 2 , in an embodiment, the insert 210 is further provided with a sealing groove 212, and the sealing ring 220 is partially accommodated in the sealing groove 212.

[0036] It should be noted that the sealing ring 220 is sleeved in the sealing groove 212, so that the position between the sealing ring 220 and the insert 210 remains unchanged.

[0037] As shown in Figure 3 and Figure 5 , in an embodiment, the end of the insert 210 away from the cooling groove 211 is further provided with a positioning protrusion 230, and the opening position of the insert slot 111 of the movable die plate 110 is further provided with a positioning groove 114, and the positioning protrusion 230 is adaptively accommodated in the positioning groove 114.

[0038] In this way, the positioning protrusion 230 is adaptively accommodated in the positioning groove 114, so that the insert 210 can be quickly and accurately inserted into the insert slot 111. Further, in an embodiment, a counterbore is formed in the positioning protrusion 230, and a screw hole is formed in the bottom wall of the positioning groove 114 at a position corresponding to the counterbore, and after the bolt passes through the counterbore and is screwed with the screw hole, the insert 210 can be fixed in the insert slot 111. In an embodiment, the positioning protrusion 230 and the insert 210 are an integral structure.

[0039] In an embodiment, the rounded corner 121 has a radius of R0.5 to R2. For example, the rounded corner 121 has a radius of R0.8 to R1. Specifically, the radius of the rounded corner 121 is 0.5mm to 2mm, and thus the radius can be 0.8mm or 1mm. In this way, the inner bottom wall of the air clearance groove 21a is in a rounded corner structure rather than a right angle structure, which effectively improves the structural strength of the air clearance groove 21a.

[0040] As shown in Figure 1 When the movable mold plate 110 is separated from the foamed outer layer 21 along the direction A relative to the foamed outer layer 21, the arc-shaped convex strip 120 is in a convex state, which pulls the inner bottom wall of the air clearance groove 21a, so that the sharp corner structure 21b is subjected to a pulling force. By setting the end of the arc-shaped convex strip 120 as a rounded corner, the inner bottom wall of the air clearance groove 21a is correspondingly formed as a rounded corner structure, which improves the anti-pulling strength of the sharp corner structure 21b. The cooling channel is arranged to quickly cool the arc-shaped convex strip 120 at a local position, so that the arc-shaped convex strip 120 reliably separates from the air clearance groove 21a. In this way, when the movable mold plate 110 moves away from the automobile steering wheel, even if the arc-shaped convex strip 120 briefly pulls the inner side wall of the air clearance groove 21a, it will not tear the inner bottom wall of the air clearance groove 21a, which improves the forming quality of the automobile steering wheel.

[0041] The above-described embodiments only express several embodiments of the present application, which are described in detail and specifically, but should not be understood as limiting the scope of the application. In the present application, the installation / fixation / arrangement, unless otherwise defined, can be understood as including but not limited to locking and fixing by screws / wires, welding. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A rapid demolding tear resistant mold structure characterized by, The utility model relates to a moulding machine, which comprises: a movable mould plate, wherein an arc-shaped convex strip is arranged on the movable mould plate, the arc-shaped convex strip is used to form a clearance groove on a foamed outer layer, a rounded corner is arranged at an end of the arc-shaped convex strip away from the movable mould plate, and a slot is formed in a side of the movable mould plate away from the arc-shaped convex strip; and a shrinkage assembly, wherein the shrinkage assembly comprises an insert block and a sealing ring, a cooling groove is formed in an outer sidewall of the insert block, the sealing ring is sleeved on the insert block, when the insert block is inserted into the slot, the sealing ring abuts against an inner sidewall of the slot, an inner sidewall of the cooling groove and the inner sidewall of the slot form a cooling channel, and the minimum straight-line distance between the cooling channel and the arc-shaped convex strip is 2mm-6mm.

2. The quick-release tear-free mold structure of claim 1, wherein, The movable mould plate is further provided with a water inlet hole and a water outlet hole, and the two ends of the cooling channel are respectively communicated with the water inlet hole and the water outlet hole.

3. The quick-release tear-free mold structure of claim 2, wherein, The cooling groove comprises an annular groove portion and two adjoining groove portions, the two adjoining groove portions are respectively arranged on the two sides of the insert block, the two adjoining groove portions are respectively communicated with the water inlet hole and the water outlet hole, the two ends of the annular groove portion are respectively communicated with the two adjoining groove portions, the annular groove portion extends to one end of the insert block, and the sealing ring is arranged on a side of the adjoining groove portion away from the annular groove portion.

4. The quick-release tear-free mold structure of claim 3, wherein, The insert block is further provided with a sealing groove, and the sealing ring is partially accommodated in the sealing groove.

5. The quick-release tear-free mold structure of claim 1, wherein, The end of the insert block away from the cooling groove is further provided with a positioning protrusion, the movable mould plate is further provided with a positioning slot near the opening position of the slot, and the positioning protrusion is accommodated in the positioning slot in a fitting manner.

6. The quick-release tear-free mold structure of claim 5, wherein, The positioning protrusion and the insert block are in an integral forming structure.

7. The quick-release tear-free mold structure of claim 1, wherein, The rounded corner is R0.5-R2.

8. The quick-release tear-free mold structure of claim 7, wherein, The rounded corner is R0.8-R1.

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