Plastic heating and softening device for blow molding machine

Abstract

The utility model discloses a plastic heating and softening device for a blow molding machine, which relates to the technical field of blow molding machines, and comprises an outer shell and an electric heating sheet arranged in the outer shell, the outer shell comprises an upper cover body and a lower cover body, positioning covers are fixedly arranged in the middles of the two sides of the upper cover body, hollow limiting blocks are fixedly connected to the side edges of the two sides of the lower cover body, and the hollow limiting blocks are arranged in the outer shell. Telescopic wedge-shaped locking blocks are arranged on the two sides of the positioning cover, the wedge-shaped locking blocks are cylindrical bodies with the upper surfaces being inclined planes, and a cylindrical inserting groove is formed in the side, right opposite to the positioning cover, of the hollow limiting block. Through the positioning cover on the upper cover body, the telescopic wedge-shaped locking block on the side wall of the positioning cover and the hollow limiting block on the lower cover body, the purpose of locking the upper cover body and the lower cover body is achieved by inserting the wedge-shaped locking block into the hollow limiting block; and meanwhile, the wedge-shaped locking block can be continuously inserted into the hollow limiting block to drive the lower cover body to continuously move upwards, so that the upper cover body and the lower cover body are attached to the outer wall of the auger more tightly.

Description

Technical Field

[0001] The utility model relates to the technical field of blow molding machines, in particular to a plastic heating and softening device for blow molding machines. Background Art

[0002] Blow molding machine is a kind of plastic product processing equipment, which mainly blows the heated and softened plastic into the desired shape by blowing air in conjunction with the cavity, and finally cools and demolds it to obtain various hollow products.

[0003] In the prior art, a blow molding machine generally uses an auger to extrude and feed plastic granular raw materials, and a heating mechanism outside the auger is used to heat and soften the plastic granules in the conveying process. After the softened plastic raw materials are softened, they are pressed into an extrusion mold to form a straight tubular body, which is then fed into a blow molding mold with a mold cavity. Air is blown into the straight tubular plastic raw materials to expand them to form a hollow shape corresponding to the mold cavity of the blow molding mold.

[0004] In actual use, the heating mechanism used to heat and soften the plastic granular raw materials inside the auger is an integrated structure, and is installed through the auger. As a result, when the heating mechanism is repaired or replaced, the parts at both ends of the auger need to be removed before the heating mechanism can be disassembled, which makes the maintenance work of the heating mechanism cumbersome and the work efficiency low. For this reason, a plastic heating and softening device for a blow molding machine is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a plastic heating and softening device for a blow molding machine to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a plastic heating and softening device for a blow molding machine, comprising an outer shell and an electric heating plate arranged inside the outer shell, the outer shell comprising an upper cover and a lower cover, positioning covers are fixedly provided at the middle of both sides of the upper cover, and hollow limit blocks are fixedly connected to the sides of both sides of the lower cover;

[0007] Retractable wedge-shaped locking blocks are provided on both sides of the positioning cover. The wedge-shaped locking blocks are cylindrical bodies with inclined upper surfaces. A columnar slot is provided on the side of the hollow limit block facing the positioning cover. The wedge-shaped locking blocks can be inserted into the columnar slot on the side wall of the hollow limit block.

[0008] Preferably, a guide column is fixedly provided in the middle part of the inner cavity of the positioning cover, and a driving block which can be lifted and lowered along the outer wall of the guide column is sleeved on the outer wall of the guide column, and both ends of the driving block are hinged with hinged rods, and the end of the hinged rod away from the driving block is movably connected to the end of the wedge-shaped locking block.

[0009] Preferably, a rotatable lifting screw is provided inside the positioning cover and at a position on one side of the guide column, the outer wall of the lifting screw is threadedly connected to the end of the driving block, and the top of the lifting screw extends above the positioning cover and is fixedly connected to an auxiliary handle.

[0010] Preferably, the upper cover body and the lower cover body both include a protective shell and a ceramic seat, the ceramic seat is fixedly embedded in the inner side of the protective shell, and the length of the electric heating plate is smaller than that of the ceramic seat and is fixedly embedded in the inner side of the vacuum chamber.

[0011] Preferably, a vacuum chamber is provided between the protective shell and the ceramic seat, and a heat insulation plate is fixedly connected to the inner wall of the protective shell.

[0012] Preferably, a second vacuum chamber is provided inside the ceramic seat, and the length of the second vacuum chamber is greater than the length of the electric heating plate.

[0013] Technical effects and advantages of the utility model:

[0014] The utility model adopts a split outer shell structure composed of an upper cover body and a lower cover body, and cooperates with a positioning cover on the upper cover body, a wedge-shaped locking block that is retractable at the side wall position of the positioning cover, and a hollow limit block on the lower cover body. The wedge-shaped locking block is inserted into the hollow limit block to achieve the purpose of locking the upper cover body and the lower cover body. At the same time, the wedge-shaped locking block can be continuously inserted into the hollow limit block to drive the lower cover body to continuously move upward, so that the upper cover body and the lower cover body are more closely fitted to the outer wall of the auger. This not only facilitates the disassembly, assembly and maintenance of the heating and softening device, but also helps to improve the heating effect of the plastic raw material inside the auger. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a schematic diagram of a partial three-dimensional cross-sectional structure of the upper cover body of the utility model.

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the ceramic cover of the utility model.

[0018] Figure 4 It is a schematic diagram of the side sectional structure of the positioning cover of the utility model.

[0019] Figure 5 This is a front cross-sectional structural schematic diagram of the drive block of the utility model.

[0020] In the figure: 100, outer shell; 101, upper cover; 102, lower cover; 103, positioning cover; 104, hollow limit block; 105, drive block; 106, hinge rod; 107, wedge-shaped locking block; 108, guide column; 109, lifting screw; 111, protective shell; 112, ceramic seat; 113, vacuum chamber one; 114, vacuum chamber two; 115, heat insulation board; 200, electric heating plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides Figure 1-5 The plastic heating and softening device for a blow molding machine shown in the figure comprises an outer shell 100 and an electric heating plate 200 arranged inside the outer shell 100. The outer shell 100 is used to wrap the outer wall of the auger on the blow molding machine, so that the electric heating plate 200 generates heat to heat the auger after being energized, so that the auger can heat the plastic raw material while extruding and conveying the plastic raw material. The outer shell 100 comprises an upper cover body 101 and a lower cover body 102. The upper cover body 101 and the lower cover body 102 both comprise a protective shell 111 and a ceramic seat 112. The ceramic seat 112 is fixedly embedded in the inner side of the protective shell 111. The length of the electric heating plate 200 is less than the length of the ceramic seat 112 and is fixedly It is fixedly embedded in the inner side of the vacuum chamber 113, a vacuum chamber 113 is provided between the protective shell 111 and the ceramic seat 112, a heat insulation board 115 is fixedly connected to the inner wall of the protective shell 111, a vacuum chamber 2 114 is provided inside the ceramic seat 112, and the length of the vacuum chamber 2 114 is greater than the length of the electric heating plate 200. By utilizing the heat insulation performance of the ceramic seat 112, the heat of the electric heating plate 200 is difficult to be transferred to the outside, and the auger on the blow molding machine can be heated more concentratedly. The heat blocking effect of the vacuum state of the vacuum chamber 113 and the vacuum chamber 2 114 on heat can be further utilized to further improve the thermal insulation effect of the outer shell 100.

[0023] Furthermore, a positioning cover 103 is fixedly provided in the middle of both sides of the upper cover body 101, and hollow limit blocks 104 are fixedly connected to the sides of both sides of the lower cover body 102. Retractable wedge-shaped locking blocks 107 are provided on both sides of the positioning cover 103. The wedge-shaped locking blocks 107 are cylindrical bodies with an inclined upper surface, and the lower surface of the wedge-shaped locking blocks 107 is a horizontal straight surface. A columnar slot is provided on the side of the hollow limit block 104 facing the positioning cover 103, and the wedge-shaped locking block 107 can be inserted into the columnar slot of the side wall of the hollow limit block 104. The wedge-shaped locking block 107 extends from the side wall of the positioning cover 103 and is gradually inserted into the columnar slot of the side wall of the hollow limit block 104. In the groove, the upper surface of the wedge-shaped locking block 107 is inclined, which can realize the limiting between the positioning cover 103 and the hollow limiting block 104 in the columnar slot inserted into the side wall of the hollow limiting block 104, and at the same time, the hollow limiting block 104 and the positioning cover 103 can move towards each other, thereby reducing the gap between the upper cover body 101 and the lower cover body 102, so that the outer shell 100 can fit more closely to the outer wall of the auger of the blow molding machine, and the airtightness is higher, which helps to improve the heating effect of the auger, so that the cooperation between the hollow limiting block 104, the positioning cover 103 and the wedge-shaped locking block 107 can achieve a double effect and stronger functionality.

[0024] Next, a rotatable lifting screw 109 is provided inside the positioning cover 103 and at one side of the guide column 108. The outer wall of the lifting screw 109 is threadedly connected to the end of the driving block 105. The top of the lifting screw 109 extends to the top of the positioning cover 103 and is fixedly connected with an auxiliary handle. The lifting screw 109 is rotated clockwise or counterclockwise to drive the driving block 105 to move vertically upward or vertically downward, thereby driving the driving block 105 to be lifted and lowered. At the same time, the self-locking effect of the lifting position of the driving block 105 can be achieved, so that the driving block 105 can be kept fixed in the adjusted position. A guide column 108 is fixedly provided in the middle part of the inner cavity of the positioning cover 103, and the outer wall of the guide column 108 is sleeved with a driving block 105 that can be lifted and lowered along the outer wall of the guide column 108. The setting of the guide column 108 can assist in guiding the driving block 105. The driving block 105 does not rotate with the rotation of the lifting screw 109, so that the driving block 105 can maintain the stability of the lifting process during the rotation drive of the lifting screw 109, thereby improving the stability of the lifting position adjustment of the driving block 105. Both ends of the driving block 105 are hinged with hinged rods 106, and the end of the hinged rod 106 away from the driving block 105 is movably connected to the end of the wedge-shaped locking block 107. The hinged rod 106 can be used to drive the driving block 105 to rotate and move during the lifting process. In conjunction with the positioning cover 103 for limiting the translation of the wedge-shaped locking block 107, the hinged rod 106 can provide a pulling force or a pushing force to the wedge-shaped locking block 107 while in motion, thereby realizing the extension or retraction of the wedge-shaped locking block 107 at the end of the positioning cover 103.

[0025] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plastic heating and softening device for a blow molding machine, comprising an outer shell (100) and an electric heating plate (200) arranged inside the outer shell (100), characterized in that: The outer shell (100) comprises an upper shell (101) and a lower shell (102); positioning shells (103) are fixedly provided in the middle of both sides of the upper shell (101); and hollow limiting blocks (104) are fixedly connected to the sides of both sides of the lower shell (102); Retractable wedge-shaped locking blocks (107) are provided on both sides of the positioning cover (103), and the wedge-shaped locking blocks (107) are cylindrical bodies with inclined upper surfaces. A columnar slot is provided on one side of the hollow limiting block (104) facing the positioning cover (103), and the wedge-shaped locking blocks (107) can be inserted into the columnar slot on the side wall of the hollow limiting block (104).

2. A plastic heating and softening device for a blow molding machine according to claim 1, characterized in that: A guide column (108) is fixedly provided in the middle of the inner cavity of the positioning cover (103); a driving block (105) which can be lifted and lowered along the outer wall of the guide column (108) is sleeved on the outer wall of the guide column (108); both ends of the driving block (105) are hinged with hinge rods (106); the end of the hinge rod (106) away from the driving block (105) is movably connected to the end of a wedge-shaped locking block (107).

3. A plastic heating and softening device for a blow molding machine according to claim 2, characterized in that: A rotatable lifting screw (109) is provided inside the positioning cover (103) and at a position on one side of the guide column (108); the outer wall of the lifting screw (109) is threadedly connected to the end of the driving block (105); the top of the lifting screw (109) extends to the top of the positioning cover (103) and is fixedly connected to an auxiliary handle.

4. A plastic heating and softening device for a blow molding machine according to claim 1, characterized in that: The upper cover body (101) and the lower cover body (102) both comprise a protective shell (111) and a ceramic seat (112); the ceramic seat (112) is fixedly embedded in the inner side of the protective shell (111); the length of the electric heating plate (200) is smaller than the length of the ceramic seat (112) and is fixedly embedded in the inner side of the vacuum chamber (113).

5. A plastic heating and softening device for a blow molding machine according to claim 4, characterized in that: A vacuum chamber (113) is provided between the protective shell (111) and the ceramic seat (112), and a heat insulation board (115) is fixedly connected to the inner wall of the protective shell (111).

6. A plastic heating and softening device for a blow molding machine according to claim 5, characterized in that: A second vacuum chamber (114) is provided inside the ceramic seat (112), and the length of the second vacuum chamber (114) is greater than the length of the electric heating plate (200).

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