Plastic dry granule screw heating and melting device

Abstract

The utility model discloses a plastic dry granule screw heating and melting device which comprises a screw extruder, and a circle of material melting jacket is arranged on the outer ring surface of the screw extruder; the screw extruder comprises a driving motor, a shell fixed on the end face of the front end of the driving motor and a machine barrel fixed on the end face of the front end of the shell, and the output end of the driving motor is connected with a transmission shaft penetrating into the shell through a coupler. The material melting jacket is arranged outside the extrusion channel of the extruder, so that materials in the extrusion channel are heated and melted, and the melting jacket can be quickly dismounted when the extruder is decomposed and cleaned due to the split type melting jacket design, so that the material melting effect is improved. And secondly, the glass fiber barrel and the rigid foam strips arranged in an annular array are arranged outside the melting jacket, so that the temperature in the jacket can be kept, premature loss of heat is avoided, a protection effect is achieved, and the high temperature of the jacket is prevented from hurting operators.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw extruder auxiliary instrument technical field, concretely relates to a plastic dry particle screw heating melting device. BACKGROUND

[0002] The core components of the hot melt extruder mainly include a screw, a barrel, a heating device, a cooling device, a driving device and a die, etc. Among them, the screw is the core component of the hot melt extruder, and its main function is to transport, heat, melt and mix the raw materials. The design of the screw directly affects the performance of the extruder, including the extrusion speed, the mixing uniformity and the product quality. The barrel is the container for the rotation of the screw, which is usually closely matched with the screw to form an extrusion chamber. Through the rotation of the screw, the material is gradually heated, sheared and compressed in the barrel until it reaches the molten state. The heating device is mainly distributed in the middle section area of the barrel, which is used to heat the material and control the temperature.

[0003] However, in actual application, since the heating device needs to melt the plastic raw materials, a part of the temperature will inevitably be lost along the barrel during the continuous heating and melting process, and since the barrel itself has thermal conductivity, the barrel is often exposed to the outside, and if the operator accidentally touches the high-temperature area of the barrel, there is a risk of body scalding. UTILITY MODEL CONTENT

[0004] The utility model aims at the deficiencies of the prior art, and provides a plastic dry particle screw heating melting device to solve the problems raised in the background art.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A plastic dry particle screw heating melting device, comprising a screw extruder, a material melting jacket is arranged on the outer surface of the screw extruder, and the material melting jacket is arranged on the outer surface of the screw extruder.

[0007] The screw extruder comprises a driving motor, an outer shell fixed on the front end surface of the driving motor, and a barrel fixed on the front end surface of the outer shell, the output end of the driving motor is connected with a transmission shaft penetrating into the inner part of the outer shell through a shaft coupling, the front end of the transmission shaft is connected with an extruder screw penetrating into the inner cavity of the barrel, and the top surface of the barrel penetrates a feeding hopper.

[0008] The material melting jacket comprises two shell bodies fixedly wrapped in the middle section of the barrel, electric heating plates fixedly inlaid on the side wall of the inner cavity of the shell body, and two glass fiber tubes fixed on the outer surface of the shell body, and the front end and the rear end of the glass fiber tube are fixedly connected with a support ring, and a plurality of hard foam strips are fixedly connected between the support rings close to each other.

[0009] As a preferred scheme of the plastic dry particle screw rod heating and melting device, the end faces close to each other of the shell body are fixedly connected with 5-10 protrusions, and the protrusions are locked and connected with each other through a screw rod and a nut.

[0010] As a preferred scheme of the plastic dry particle screw rod heating and melting device, the inner cavity side wall of the shell body is provided with a groove for inlaying and fixing the electric heating plate.

[0011] As a preferred scheme of the plastic dry particle screw rod heating and melting device, the inner circle surface of the electric heating plate is in close contact with the outer circle surface of the barrel.

[0012] As a preferred scheme of the plastic dry particle screw rod heating and melting device, the inner side surface of the hard foam strip is provided with a spacing of 5-7 cm from the outer circle surface of the glass fiber tube.

[0013] As a preferred scheme of the plastic dry particle screw rod heating and melting device, the hard foam strips are arranged in a ring array around the central axis of the glass fiber tube and the support ring.

[0014] As a preferred scheme of the plastic dry particle screw rod heating and melting device, the inner cavity of the shell is fixedly connected with a bearing matched with the transmission shaft.

[0015] As a preferred scheme of the plastic dry particle screw rod heating and melting device, the top surface of the barrel is provided with a through hole for inserting the bottom end port of the feeding hopper, and the bottom end surface of the feeding hopper is flush with the inner cavity side wall of the barrel.

[0016] The beneficial effects of the utility model are as follows:

[0017] The utility model discloses an extruder's extrusion channel outside sets up material melting jacket, realizes the material in the heating melting treatment of extrusion channel inside, and the melting jacket design of split type can let extruder remove the melting jacket when the decomposition cleaning fast, secondly, the outside setting glass fibre cylinder and the hard foam strip of annular array arrangement of melting jacket, not only can the temperature in the jacket heat preservation, avoid heat loss too early, and have the protection function, avoid the high temperature of jacket to the harm of operating personnel. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be to the utility model embodiment needed to use the drawing briefly introduce. Obviously, the following described drawing is only some embodiments of the utility model, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other drawings according to these drawings.

[0019] Figure 1 It is the overall structure schematic diagram of the plastic dry particle screw heating melting device of the utility model.

[0020] Figure 2 It is the exploded structure schematic diagram of the screw extruder of the utility model.

[0021] Figure 3 It is the exploded structure schematic diagram of the material melting jacket of the utility model.

[0022] In the drawing:

[0023] 1, screw extruder; 11, drive motor; 12, transmission shaft; 13, bearing; 14, extruder screw; 15, cylinder; 16, feed hopper; 17, shell; 2, material melting jacket; 21, shell; 22, lug; 23, support ring; 24, glass fibre cylinder; 25, hard foam strip; 26, recess; 27, electric heating plate. DETAILED DESCRIPTION

[0024] The technical scheme of the utility model will be further illustrated by the specific implementation mode below in conjunction with the drawings.

[0025] Among them, the drawing is only used for example explanation, and the representation is only schematic diagram, and not the real object drawing, and can not be understood as the limitation of this patent; In order to better illustrate the embodiment of the utility model, some components of the drawing can be omitted, enlarged or reduced, and not represent the size of actual product; For the ordinary skilled person in the art, it is understandable that some well-known structures in the drawing and its description can be omitted.

[0026] The same or similar reference signs in the drawings of the embodiments of the present utility model correspond to the same or similar components; in the description of the present utility model, it is understood that if the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation and be operated, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, for ordinary skilled persons in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0027] In the description of the present utility model, unless otherwise explicitly specified and limited, if the terms "connection" and the like indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two components or the interaction relationship between two components. For ordinary skilled persons in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0028] As shown in Figure 1 The present utility model provides a kind of plastic dry particle screw heating melting device, including screw extruder 1, a circle of material melting jacket 2 is provided on the outer circle surface of screw extruder 1;

[0029] As shown in Figure 2 Screw extruder 1 specifically includes drive motor 11, shell 17 fixed on the front end surface of drive motor 11, and barrel 15 fixed on the front end surface of shell 17, the output end of drive motor 11 is connected with transmission shaft 12 penetrating into the inside of shell 17 through coupling, the front end of transmission shaft 12 is connected with extruder screw 14 penetrating into the inner cavity of barrel 15, the top surface of barrel 15 penetrates feed hopper 16;

[0030] As shown in Figure 3 Material melting jacket 2 specifically includes two pieces of shell 21 wrapped and fixed in the middle section of the outer circle of barrel 15, electric heating plate 27 embedded and fixed on the inner cavity side wall of shell 21, and two pieces of glass fiber cylinder 24 fixed on the outer surface of shell 21, and one piece of support ring 23 is fixedly connected between the front and rear ends of glass fiber cylinder 24, and a plurality of hard foam strips 25 are fixedly connected between the mutually close support rings 23.

[0031] Specifically, the shell 21 of the embodiment is fixedly connected with 5-10 protrusions 22 on the end faces close to each other, and the protrusions 22 are locked and connected with each other through a screw rod and a nut, and the inner cavity side wall of the shell 21 is provided with a groove 26 for embedding and fixing the electric heating plate 27, and the inner circle surface of the electric heating plate 27 is in close contact with the outer circle surface of the machine cylinder 15.

[0032] More specifically, the hard foam strip 25 of the embodiment has a spacing of 5-7 cm between the inner side surface and the outer circle surface of the glass fiber cylinder 24; the hard foam strip 25 is arranged in a ring array with the central axis of the glass fiber cylinder 24 and the support ring 23 as the reference line, the inner cavity of the shell 17 is fixedly connected with a bearing 13 matched with the transmission shaft 12, the top surface of the machine cylinder 15 is provided with a through hole for inserting the bottom end port of the feeding hopper 16, and the bottom end surface of the feeding hopper 16 is flush with the inner cavity side wall of the machine cylinder 15.

[0033] According to the above-mentioned preferred technical scheme, the working process of the technical scheme is described.

[0034] The plastic dry particle screw heating and melting device, when in use, first puts the plastic raw material for manufacturing plastic products into the gap between the machine cylinder 15 and the extruder screw 14 through the feeding hopper 16, and after the driving motor 11 drives the transmission shaft 12 to rotate, the transmission shaft 12 transmits the rotating force to the extruder screw 14, so as to force the extruder screw 14 to move the plastic raw material to the extrusion end position, and after the raw material passes through the middle section position of the machine cylinder 15, the electric heating plate 27 inside the shell 21 melts the raw material, and at this time, the glass fiber cylinder 24 wraps the outer circle of the machine cylinder 15, not only keeping the temperature of the middle section position of the machine cylinder 15, but also avoiding temperature loss to the outside, and in addition, since the hard foam strip 25 and the glass fiber cylinder 24 have a spacing, even if the operator accidentally touches the machine cylinder 15, the hard foam strip 25 blocks the operator's limbs, and cooperates with the heat insulation performance of the glass fiber cylinder 24, so as to better protect the operator from being injured by high temperature.

[0035] It should be noted that the above specific embodiments are only preferred embodiments of the present application and the technical principles applied. Those skilled in the art should understand that various modifications, equivalent replacements, changes, etc. can be made to the present application. However, as long as these changes do not deviate from the spirit of the present application, they should be within the protection scope of the present application. In addition, some terms used in the specification and claims of the present application are not limited, but only for the convenience of description.

Claims

1. A screw heating and melting device for dry plastic pellets, characterized in that, It includes a screw extruder (1), and a material melting jacket (2) is provided on the outer ring surface of the screw extruder (1); The screw extruder (1) includes a drive motor (11), a housing (17) fixed on the front end face of the drive motor (11), and a barrel (15) fixed on the front end face of the housing (17). The output end of the drive motor (11) is connected to a drive shaft (12) that penetrates into the housing (17) via a coupling. The front end of the drive shaft (12) is connected to an extruder screw (14) that penetrates into the inner cavity of the barrel (15). A feed hopper (16) penetrates the top surface of the barrel (15). The material melting jacket (2) includes two shells (21) that are wrapped and fixed in the middle of the outer ring of the barrel (15), an electric heating plate (27) that is embedded and fixed in the inner wall of the shell (21), and two glass fiber tubes (24) that are fixed on the outer surface of the shell (21). Each of the front and rear ends of the glass fiber tube (24) is fixedly connected to a support ring (23), and several rigid foam strips (25) are fixedly connected between the support rings (23) and close to each other.

2. The plastic dry pellet screw heating and melting device according to claim 1, characterized in that, Five to ten protrusions (22) are fixedly connected to each other on the end faces of the housing (21) that are close to each other, and the protrusions (22) are locked together by screws and nuts.

3. The plastic dry pellet screw heating and melting device according to claim 1, characterized in that, The inner cavity sidewall of the housing (21) is provided with grooves (26) for embedding and fixing the power supply heating plate (27).

4. The plastic dry pellet screw heating and melting device according to claim 1, characterized in that, The inner surface of the electric heating plate (27) is in close contact with the outer surface of the barrel (15).

5. The plastic dry pellet screw heating and melting device according to claim 1, characterized in that, There is a 5-7cm gap between the inner surface of the rigid foam strip (25) and the outer surface of the glass fiber tube (24).

6. The plastic dry pellet screw heating and melting device according to claim 1, characterized in that, The rigid foam strips (25) are arranged in a ring array with the central axis of the glass fiber tube (24) and the support ring (23) as the reference line.

7. The plastic dry pellet screw heating and melting device according to claim 1, characterized in that, A bearing (13) adapted to the drive shaft (12) is fixedly connected in the inner cavity of the outer shell (17).

8. The plastic dry pellet screw heating and melting device according to claim 1, characterized in that, The top surface of the barrel (15) is provided with a through hole for the bottom end of the feed hopper (16) to be inserted, and the bottom end face of the feed hopper (16) is flush with the inner cavity side wall of the barrel (15).

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