Air exhausting and material overflowing structure of PU (Polyurethane) mold

Abstract

The utility model relates to the technical field of flash structures, and discloses an exhaust flash structure of a PU (polyurethane) mold, which solves the problems in the background technology and comprises a cylinder, the cylinder is arranged on a mold frame through a fixing device, the telescopic end of the cylinder is connected to the bottom of a push plate, guide shafts are respectively arranged on two sides of the cylinder, and the guide shafts are connected with the push plate. The top ends of the two guide shafts are fixedly connected to the bottom of the push plate, the lengths of the two guide shafts are completely the same, the two guide shafts are parallel to the telescopic end of the air cylinder, the bottoms of the two guide shafts are jointly connected with a sliding block, the sliding block is embedded in the mold frame in a sliding mode, an exhaust groove and an overflow groove are formed in the sliding block, and the exhaust groove is communicated with the overflow groove. According to the utility model, after the production is finished, the air cylinder can drive the sliding block to extend out of the deep layer of the mold, so that the flash groove is exposed outside the mold, an operator can conveniently and directly clean residual materials in the flash groove, and the problem of residues is effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the overflow structure technical field, concretely is a kind of PU mould exhaust overflow structure. BACKGROUND

[0002] In the PU material injection molding process, PU fluid flows from the front to the rear of the mold through the left and right two flow channels, and converges at the tail, the air existing in the mold flow channel needs to be discharged during injection to avoid affecting the quality of the final product, therefore, effective exhaust position and overflow device need to be set at the tail convergence point to facilitate smooth air discharge.

[0003] The utility model discloses a kind of overflow groove structures of injection mould, belong to overflow groove structure technical field of injection mould.The utility model discloses, including mould, the middle position of the top of the mould is equipped with glue inlet point, the end of the top of the mould away from glue inlet point is equipped with overflow groove.The utility model discloses, overflow groove is set on the mould, overflow groove injection, material flows in cavity, a large amount of gas is excluded with overflow through overflow groove, to meet the quality requirement when product production, can not use traditional exhaust groove, reduce the defect problem that product filling terminal forms binding line caused by exhaust groove, increase the yield of product, reduce the waste of material, in this way reduce cost.But its overflow groove is fixed, located in the deep layer of mould, overflow produced in production process will be accumulated in overflow groove, since overflow groove position is fixed and space is limited, cleaning operation is complex and time-consuming, residual substance is difficult to completely remove, easy to cause blockage, pollution etc. in subsequent production, for this, we provide a kind of PU mould exhaust overflow structure. UTILITY MODEL CONTENTS

[0004] In order to solve the problems raised in the background art, the utility model provides the following technical scheme: a PU mould exhaust overflow structure, comprising a gas cylinder, the gas cylinder is arranged on the mold frame through a fixing device, the gas cylinder is connected to the bottom of the push plate at the telescopic end, two guide shafts are arranged on the two sides of the gas cylinder, the top ends of the two guide shafts are fixedly connected to the bottom of the push plate, the lengths of the two guide shafts are the same, the two guide shafts and the telescopic end of the gas cylinder are mutually parallel, a sliding block is connected to the bottoms of the two guide shafts, the sliding block is slidably embedded in the mold frame, and an exhaust groove and an overflow groove are arranged on the sliding block.

[0005] Preferably, the fixing device is a screw, which is convenient for installation and disassembly.

[0006] Preferably, the exhaust groove and the overflow groove are mutually penetrated, so that air and excess PU material can be smoothly discharged during injection molding.

[0007] Preferably, the cross sections of the exhaust groove and the overflow groove are both rounded rectangles, which are simple in structure, smooth in profile and easy to clean without dead angle.

[0008] Preferably, the exhaust groove corresponds to the meeting point of the PU material, which ensures that the air at the meeting point is discharged in time, prevents the gas from being wrapped in the material, and improves the quality of the final molded product.

[0009] Preferably, the gap between the sliding block and the mold frame is 0.02-0.05mm, which prevents material leakage during work and ensures that the sliding block can be smoothly ejected and fallen back under the drive of the air cylinder.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] The air cylinder is installed on the mold frame through the fixing device, the air cylinder is in the initial position after the mold is closed, the sliding block is pushed to the lower part inside the mold frame, the PU material flows to the tail of the mold through the left and right two flow channels after the injection molding starts, the air in the mold cavity is discharged through the exhaust groove during the material flow, the air is completely discharged when the material approaches the meeting point, the excess PU material is discharged from the mold cavity through the overflow groove, the material accumulation is avoided, the air and the excess material in the mold are discharged after the injection molding is completed, the surface of the finished product is smooth and free of bubbles, the air cylinder keeps the position of the sliding block in the mold frame until the molding is completed, the air cylinder is retracted, the push plate is pulled downward, the sliding block is driven to descend through the guide shaft, so that the sliding block is extended from the mold frame, the exhaust groove and the overflow groove are exposed, the operator can conveniently clean the overflow groove and the exhaust groove, remove the residual material, after the cleaning is completed, the air cylinder pushes the sliding block back to the initial position again, prepares for the next round of injection molding, and after the production is completed, the air cylinder can drive the sliding block to extend from the deep part of the mold, so that the overflow groove is exposed outside the mold, the operator can directly clean the residual material in the overflow groove, and the problem of residual material is effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, which are used together with embodiments of the utility model to explain the utility model, and do not constitute a limitation to the utility model. In the drawings:

[0013] Fig. 1 It is a front view structural schematic diagram of the whole utility model;

[0014] Fig. 2 It is a structural schematic diagram that the whole utility model is installed in cooperation with the mold;

[0015] In the drawing: 1, air cylinder; 2, push plate; 3, guide shaft; 4, sliding block; 5, exhaust groove; 6, overflow groove; 7, mold frame. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0017] By Figs. 1-2 The utility model discloses a push plate structure, which comprises a cylinder 1, the cylinder 1 is arranged on a mold frame 7 through a fixing device, the cylinder 1 is connected to the bottom of a push plate 2, the cylinder 1 is provided with a guide shaft 3 on both sides, the top of the two guide shafts 3 is fixedly connected to the bottom of the push plate 2, the length of the two guide shafts 3 is completely same, the two guide shafts 3 are parallel to the cylinder 1, the bottom of the two guide shafts 3 is connected with a sliding block 4, the sliding block 4 is slidably embedded in the mold frame 7, the sliding block 4 is provided with an exhaust groove 5 and a material overflow groove 6.

[0018] The fixing device is a screw, which is convenient to install and disassemble.

[0019] The exhaust groove 5 and the material overflow groove 6 are mutually penetrated, so that air and excess PU material can be smoothly discharged during injection molding.

[0020] The cross section of the exhaust groove 5 and the material overflow groove 6 is a rounded rectangle, which is simple in structure, smooth in profile and convenient to clean without dead angle.

[0021] The exhaust groove 5 corresponds to the meeting point of the PU material, which ensures that air at the meeting point is discharged in time, prevents gas from being wrapped in the material, and improves the quality of the final molded product.

[0022] The gap between the sliding block 4 and the mold frame 7 is 0.02-0.05mm, which prevents material leakage during work and ensures that the sliding block 4 can smoothly eject and fall back under the drive of the cylinder 1.

[0023] Working principle: the air cylinder 1 is installed on the mold frame 7 through the fixing device, the air cylinder 1 is in the initial position after the mold is closed, the sliding block 4 is pushed to the lower part inside the mold frame 7, after the injection molding starts, the PU material converges to the tail of the mold through the left and right two flow channels, in the process of material flow, the air in the mold cavity is discharged through the exhaust groove 5, when the material approaches the convergence point, the air is completely discharged, the excess PU material is discharged from the mold cavity through the overflow groove 6, so as to avoid material accumulation, after the injection molding is finished, the air and the excess material in the mold are discharged, so as to ensure that the finished product surface is smooth and bubble-free, the air cylinder 1 keeps the position of the sliding block 4 in the mold frame 7 until the molding solidification is completed, the air cylinder 1 is retracted, the push plate 2 is pulled downward, the sliding block 4 is driven to descend through the guide shaft 3, so that the sliding block 4 is stretched out from the mold frame 7, the exhaust groove 5 and the overflow groove 6 are exposed, the operator can conveniently clean the overflow groove 6 and the exhaust groove 5, remove the residual material, after the cleaning is completed, the air cylinder 1 pushes the sliding block 4 back to the initial position again, prepares for the next round of injection molding, after the production is finished, the air cylinder 1 can drive the sliding block 4 to stretch out from the deep part of the mold, so that the overflow groove 6 is exposed outside the mold, so as to facilitate the operator to directly clean the residual material in the overflow groove 6, and the problem of residual material is effectively avoided.

[0024] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0025] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A PU mold exhaust and overflow structure, comprising a cylinder (1), characterized in that: The cylinder (1) is arranged on the mold frame (7) through a fixing device, the telescopic end of the cylinder (1) is connected to the bottom of the push plate (2), and guide shafts (3) are respectively arranged on both sides of the cylinder (1). The top ends of the two guide shafts (3) are respectively fixedly connected to the bottom of the push plate (2), the two guide shafts (3) are exactly the same in length, the two guide shafts (3) and the telescopic end of the cylinder (1) are parallel to each other, and the bottoms of the two guide shafts (3) are commonly connected to a slider (4), the slider (4) is slidably embedded in the mold frame (7), and the slider (4) is provided with an exhaust groove (5) and an overflow groove (6).

2. A PU mold exhaust and overflow structure according to claim 1, characterized in that: The fixing means is a screw.

3. The PU mold exhaust and overflow structure according to claim 1, characterized in that: The exhaust groove (5) and the overflow groove (6) are interconnected.

4. A PU mold exhaust and overflow structure according to claim 3, characterized in that: The cross sections of the exhaust groove (5) and the overflow groove (6) are both rounded rectangles.

5. A PU mold exhaust and overflow structure according to claim 4, characterized in that: The exhaust groove (5) corresponds to the confluence point of the PU material.

6. A PU mold exhaust and overflow structure according to claim 5, characterized in that: The gap between the slider (4) and the mold frame (7) is 0.02-0.05 mm.

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