Vacuum sizing sleeve connecting structure

Abstract

The utility model discloses a vacuum sizing sleeve connecting structure, and relates to the technical field of sizing sleeves. Comprising a first flange plate and a second flange plate, a second flange plate matched with the first flange plate is arranged at the end part of the vacuum sizing sleeve body, and the vacuum sizing sleeve body is in butt joint with the mouth mold and is fixed through flange connection between the second flange plate and the first flange plate; the connecting sleeve structure is used for connecting a port between the vacuum sizing sleeve body and the mouth mold and comprises a connecting sleeve ring, one end of the connecting sleeve ring is in plain end butt joint with the port of the mouth mold, and the outer side surface of the other end of the connecting sleeve ring is arranged to be an outer conical surface; the inner side surface of the end, in butt joint with the connecting lantern ring, of the vacuum sizing sleeve body is arranged to be an inner conical surface corresponding to the conical surface of the connecting lantern ring.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sizing sleeve, especially to a vacuum sizing sleeve connecting structure. BACKGROUND

[0002] Sizing sleeve is a product used in plastic pipe production. The vacuum sizing area of the pipe vacuum sizing sleeve basically adopts a vacuum tank structure. The tank width is relatively small near the inlet position, generally 1-1.5mm, and is arranged relatively densely. Since the pipe is just starting to cool at this time, the temperature is high, and it is relatively soft. If the tank width is too large, it will cause the pipe surface to be sucked in, thereby affecting the appearance quality. As the pipe is gradually cooled and hardened, the tank width can be increased to 3-4mm, and the tank spacing can also be increased. During the molding process of plastic pipes, the material is plasticized in the extruder and then extruded into a tubular shape through the annular gap of the head mandrel and the die, and then enters the sizing device for cooling and sizing.

[0003] Among them, in the plastic extrusion molding process, the diameter difference between the extruder die and the sizing sleeve is a crucial parameter. This difference not only affects the stability of the extrusion process, but also directly relates to the dimensional accuracy and surface quality of the final product. The diameter difference between the extruder die and the sizing sleeve is usually recommended to be between 0.1 and 0.3 millimeters. This range can ensure the stability of the extrusion process and the dimensional accuracy of the final product. The specific difference should be accurately adjusted according to the material used, production speed and product requirements. Specifically, if the diameter difference between the two is too large, it may cause unstable flow of the melt when it flows out, thereby affecting the size and shape of the product. Conversely, if the diameter difference is too small, it may cause excessive resistance, making it difficult for the melt to flow, and even may cause equipment damage. By reasonably controlling this difference and adjusting and optimizing it in combination with actual production conditions, the stability of extrusion molding and product quality can be significantly improved.

[0004] However, the prior art directly connects through the direct docking of the flat mouth structure between the sizing sleeve and the die, and connects through the flange connection, or directly uses the threaded connection to realize the docking and connection. However, the above-mentioned methods all have large size errors, especially the threaded connection, which is difficult to control the manufacturing precision, and the error when the threaded screw hole is engaged will also cause the sizing sleeve and the die to be misaligned at the joint, thereby seriously affecting the processing quality of the pipe. Another very important reason is that the sizing sleeve and the extruder die are generally separate products, and the errors generated after their respective processing and production cannot be eliminated, so a connection structure that can eliminate size errors and facilitate finishing is needed to control the reasonable size error between the sizing sleeve and the die.

[0005] Therefore, based on the above technical problems, the skilled in the art urgently needs to develop a vacuum sizing sleeve connecting structure. UTILITY MODEL CONTENTS

[0006] The utility model discloses a vacuum sizing sleeve connecting structure which solves the above problems.

[0007] In order to realize the above object, the utility model provides the following technical scheme:

[0008] The utility model discloses a vacuum sizing sleeve connecting structure, including the mouth mould of extruder, including:

[0009] First flange, the end of the mouth mould is provided with the first flange;

[0010] Vacuum sizing sleeve body, the end of the vacuum sizing sleeve body is provided with the second flange matched with the first flange, and the vacuum sizing sleeve body is fixed through the flange connection between the second flange and the first flange when the vacuum sizing sleeve body and the mouth mould are butted; and

[0011] The utility model discloses a vacuum sizing sleeve connecting structure, including the mouth mould of extruder, including:

[0012] Further, the third flange is arranged on the adapter ring and clamped between the first flange and the second flange.

[0013] Further, the first flange, the second flange and the third flange are overlapped and flange-connected.

[0014] Further, the first positioning structure is arranged between the first flange and the third flange, the first positioning structure includes a plurality of first positioning protrusions arranged on the third flange and a plurality of first positioning grooves arranged on the first flange, the first positioning grooves are used to make the first positioning protrusions extend into the positioning, and the plurality of first positioning protrusions and the plurality of first positioning grooves are one-to-one correspondingly arranged.

[0015] Further, the second positioning structure is arranged between the second flange and the third flange, the second positioning structure includes a plurality of second positioning protrusions arranged on the second flange and a plurality of second positioning grooves arranged on the third flange, the second positioning grooves are used to make the second positioning protrusions extend into the positioning, and the plurality of second positioning protrusions and the plurality of second positioning grooves are one-to-one correspondingly arranged.

[0016] In the above technical scheme, the utility model provides a vacuum sizing sleeve connecting structure, which has the following beneficial effects:

[0017] The device sets the connecting sleeve structure between the vacuum sizing sleeve and the die of the extruder, and the vacuum sizing sleeve and the die are connected through the machining of the small volume connecting sleeve structure, so that the vacuum sizing sleeve and the die are better connected, and the size error is more easily controlled in a reasonable range, and the stability of the extrusion molding and the product quality are improved through the connecting structure between the vacuum sizing sleeve and the die of the extruder. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0019] Fig. 1 A structure diagram of a vacuum sizing sleeve connecting structure provided by the present application embodiment;

[0020] Fig. 2 A structure diagram of a connecting sleeve ring of a vacuum sizing sleeve connecting structure provided by the present application embodiment;

[0021] Fig. 3 An exploded view of a vacuum sizing sleeve connecting structure provided by the present application embodiment.

[0022] Explanation of reference signs:

[0023] 1, die; 2, first flange plate; 3, vacuum sizing sleeve body; 4, second flange plate; 5, connecting sleeve ring; 6, third flange plate; 7, first positioning protrusion; 8, first positioning groove; 9, second positioning protrusion; 10, second positioning groove. DETAILED DESCRIPTION

[0024] In order to make those skilled in the art better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0025] Please refer to Figs. 1-3 A vacuum sizing sleeve connecting structure, including a die 1 of an extruder, a plastic pipe is extruded from the die 1 of the extruder, and then enters the vacuum sizing sleeve connected with the die 1 for sizing, the vacuum sizing sleeve connecting structure comprises:

[0026] A first flange plate 2 is arranged at the end of the die 1, and the first flange plate 2 is used to connect the end of the die 1 with the vacuum sizing sleeve through the flange plate;

[0027] The vacuum sizing sleeve body 3 is provided with a second flange plate 4 matched with the first flange plate 2 at the end thereof, and the vacuum sizing sleeve body 3 is fixed by flange connection between the second flange plate 4 and the first flange plate 2 when abutting to the die 1, so as to more accurately realize the abutting between the vacuum sizing sleeve body 3 and the die 1.

[0028] The adapter sleeve structure is used to adapt the port between the vacuum sizing sleeve body 3 and the die 1, and the adapter sleeve ring 5 is provided with a flat port abutting structure between one end thereof and the port of the die 1, and the other end of the adapter sleeve ring 5 is provided with an outer conical surface, and the inner side surface of the end of the vacuum sizing sleeve body 3 abutting to the adapter sleeve ring 5 is provided with an inner conical surface corresponding to the conical surface of the adapter sleeve ring 5.

[0029] Specifically, when the vacuum sizing sleeve body 3 and the die 1 are abutted, the adapter sleeve ring 5 is arranged between the vacuum sizing sleeve body 3 and the die 1 for adaptation, and because the adapter sleeve ring 5 is easier to process and control precision, one end of the adapter sleeve ring 5 is directly provided with a flat port structure and coaxially abutted to the port of the die 1, and then the flange connection is used for fixed connection, because the adapter sleeve ring 5 has high processing precision, the abutting between the adapter sleeve ring 5 and the die 1 can be realized with smaller error, and the other end of the adapter sleeve ring 5 is abutted to the port of the vacuum sizing sleeve body 3 in a gentle transition manner through the cooperation of the conical surfaces, so as to avoid radial error during abutting, reduce abutting error and gap, and better match the required error range.

[0030] Further, the third flange plate 6 is arranged on the adapter sleeve ring 5 and clamped between the first flange plate 2 and the second flange plate 4.

[0031] Further, the first flange plate 2, the second flange plate 4 and the third flange plate 6 are overlapped and flange-connected.

[0032] The flange connection between the first flange plate 2, the second flange plate 4 and the third flange plate 6 fixes and connects the die 1, the vacuum sizing sleeve body 3 and the adapter sleeve ring 5.

[0033] Further, the first positioning structure is arranged between the first flange plate 2 and the third flange plate 6, and the first positioning structure includes a plurality of first positioning protrusions 7 arranged on the third flange plate 6 and a plurality of first positioning grooves 8 arranged on the first flange plate 2, the first positioning grooves 8 are used to make the first positioning protrusions 7 extend into the positioning, and the plurality of first positioning protrusions 7 and the plurality of first positioning grooves 8 are arranged one by one in correspondence.

[0034] Further, the second positioning structure is arranged between the second flange plate 4 and the third flange plate 6, the second positioning structure comprises a plurality of second positioning protrusions 9 arranged on the second flange plate 4 and a plurality of second positioning grooves 10 arranged on the third flange plate 6, the second positioning grooves 10 are used for inserting the second positioning protrusions 9 to position, and the plurality of second positioning protrusions 9 and the plurality of second positioning grooves 10 are arranged in one-to-one correspondence.

[0035] Specifically, the first positioning structure is arranged between the die 1 and the adapter ring 5 to realize docking and positioning, and the second positioning structure is arranged between the vacuum sizing sleeve body 3 and the adapter ring 5 to realize docking and positioning, so as to ensure the docking accuracy and the assembly efficiency.

[0036] The device sets the adapter sleeve structure between the vacuum sizing sleeve and the die of the extruder, and the adapter sleeve structure with small volume is finely processed, so that the vacuum sizing sleeve and the die are better connected, and the size error is more easily controlled in a reasonable range, the connection structure between the vacuum sizing sleeve and the die of the extruder realizes the stability of the extrusion molding and the significant improvement of the product quality.

[0037] The above only describes some exemplary embodiments of the device by way of illustration, without doubt, for ordinary skilled in the art, the described embodiments can be modified in various ways without departing from the spirit and scope of the device. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the device.

Claims

1. A vacuum sizing sleeve connection structure comprising a die (1) of an extruder, characterized in that, The application relates to a vacuum sizing sleeve structure for a die head, which comprises the following parts: a first flange (2) arranged at the end of the die head (1); a vacuum sizing sleeve body (3) with a second flange (4) arranged at the end of the vacuum sizing sleeve body (3) and matched with the first flange (2), the vacuum sizing sleeve body (3) being fixed to the die head (1) through flange connection between the second flange (4) and the first flange (2); and an adapter sleeve structure arranged to connect the port between the vacuum sizing sleeve body (3) and the die head (1), which comprises an adapter sleeve ring (5) with one end matched with the port of the die head (1) and the other end provided with an outer conical surface, and the inner surface of the end of the vacuum sizing sleeve body (3) matched with the adapter sleeve ring (5) is provided with an inner conical surface matched with the conical surface of the adapter sleeve ring (5). The adapter sleeve ring (5) is provided with a third flange (6) clamped between the first flange (2) and the second flange (4).

2. The vacuum sizing sleeve connection of claim 1, wherein, The first flange (2), the second flange (4) and the third flange (6) are overlapped and connected through flange connection.

3. The vacuum sizing sleeve connection of claim 2, wherein: A first positioning structure is arranged between the first flange (2) and the third flange (6), which comprises a plurality of first positioning protrusions (7) arranged on the third flange (6) and a plurality of first positioning grooves (8) arranged on the first flange (2), the first positioning grooves (8) being used for positioning the first positioning protrusions (7), and the first positioning protrusions (7) and the first positioning grooves (8) are arranged in one-to-one correspondence.

4. The vacuum sizing sleeve connection of claim 2, wherein: A second positioning structure is arranged between the second flange (4) and the third flange (6), which comprises a plurality of second positioning protrusions (9) arranged on the second flange (4) and a plurality of second positioning grooves (10) arranged on the third flange (6), the second positioning grooves (10) being used for positioning the second positioning protrusions (9), and the second positioning protrusions (9) and the second positioning grooves (10) are arranged in one-to-one correspondence.

5. The vacuum sizing sleeve connection of claim 2, wherein: ​

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