A preform heating device for a bottle blowing machine

Abstract

The utility model relates to the technical field of plastic bottle production equipment discloses a bottle blank heating device of bottle blowing machine, the bottle blank heating device of bottle blowing machine includes heating box, heating pipe, reflector, first baffle, second baffle, drive mechanism, connecting rod and two third baffles. Through setting third baffle at the front and back of reflector, make can block part hot air from the front and back of heating channel loss with the third baffle, again cooperate the use of first baffle and second baffle, can further prolong the residence time of hot air in heating channel, thereby reduce heat loss, make the heating effect of bottle blank heating device of bottle blowing machine further improve. And through setting drive mechanism at the top of heating box, drive reflector to move relative to heating box, make when bottle blank enters and exits heating channel, bottle blank will not be blocked by third baffle, guarantee the appearance and structural integrity of bottle blank at the same time, also will not influence production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic bottle production equipment, and in particular to a preform heating device for a blow molding machine. Background Technology

[0002] The manufacturing of plastic bottles begins with processing plastic raw materials into preforms, which are then used in the blow molding process. Before blow molding, the preforms need to be heated to a softened state, thus requiring a preform heating device. Chinese patent document CN223326923 U discloses a heating device for a blow molding machine, including a frame, a reflector mounted on the upper part of the frame, a heating base mounted on the upper part of the frame, an outer baffle plate one mounted on the upper part of the heating base's fixed panel, an outer baffle plate two mounted on the lower part of the heating base's fixed frame, an inner baffle plate one mounted on the upper part of the reflector, and an inner baffle plate two mounted on the lower part of the reflector. The inner and outer baffle plates can block some of the hot air in the heating channel, allowing the hot air to remain in the heating channel for a longer time, resulting in better heating. However, in the aforementioned blow molding machine heating device, the hot air flow towards the front and rear ends of the reflector is not blocked, causing some hot air to quickly escape outside the heating device. Therefore, the heating effect of existing blow molding machine heating devices still needs improvement. Utility Model Content

[0003] The purpose of this invention is to provide a preform heating device for a blow molding machine, which aims to solve the problem that the heating effect of existing blow molding machine heating devices still needs to be improved.

[0004] A preform heating device for a blow molding machine includes a heating box with an inner opening, a heating tube disposed within the heating box, a reflector vertically arranged and opposite to the opening, a first wind deflector horizontally disposed at the upper end of the reflector, and a second wind deflector horizontally disposed at the lower end of the reflector. It also includes a driving mechanism, a connecting rod, and two third wind deflectors. The two third wind deflectors are respectively vertically disposed at the front and rear ends of the reflector, and are connected to the inner side of the reflector. The driving mechanism is located at the top of the heating box. The connecting rod is horizontally arranged, with one end connected to the reflector and the other end connected to the driving mechanism.

[0005] Optionally, an air outlet is provided on the outside of the heating box, and a pipe joint is detachably connected to the air outlet. The pipe joint is connected to an air supply pipe, and the air supply pipe is connected to a blower.

[0006] Optionally, the air outlet is provided with an air distribution plate; the air distribution plate has multiple air inlets spaced apart.

[0007] Optionally, the driving mechanism is a dual-axis slide cylinder, and the end of the connecting rod is connected to the slide of the dual-axis slide cylinder.

[0008] Optionally, the preform heating device of the blow molding machine further includes a guide rod and a fixing frame; the axial direction of the guide rod is parallel to the axial direction of the connecting rod, and the guide rod is fixed on the fixing frame; the lower part of the reflector is movably sleeved on the guide rod.

[0009] Optionally, the fixing frame includes a first support plate arranged horizontally and a second support plate arranged vertically on the first support plate; the guide rod is fixedly inserted through the second support plate; a guide sleeve is fixed to the outside of the reflector; the guide sleeve is movably sleeved on the guide rod.

[0010] Optionally, the heating box includes a panel with a U-shaped horizontal cross-section, a support plate horizontally disposed inside the panel, and an air outlet plate horizontally disposed inside the panel and located below the support plate; the driving mechanism is disposed on the support plate; the air outlet plate has an air cavity inside, and multiple cooling air outlet holes are spaced apart on the side of the air outlet plate facing the reflector; the cooling air outlet holes are connected to the air cavity; and an air delivery pipe connected to the air cavity is disposed on the outside of the air outlet plate.

[0011] Optionally, the heating tube is fitted with end caps at both ends; the end caps are provided with outlet holes for cables to pass through.

[0012] Optionally, a screw is connected to the end cap; the outer side of the heating box is provided with a mounting hole for the screw to pass through; and a nut is fitted on the screw to press against the outer wall of the heating box.

[0013] Beneficial effects: This invention provides a preform heating device for a blow molding machine. By setting third baffles at both ends of the reflector, some hot air can be prevented from escaping from the front and rear sides of the heating channel. Combined with the use of the first and second baffles, the residence time of hot air in the heating channel can be further extended, thereby reducing heat loss and improving the heating effect of the device. Furthermore, by setting a drive mechanism at the top of the heating chamber to move the reflector relative to the heating chamber, the preform is not obstructed by the third baffle when entering and exiting the heating channel. This ensures the appearance and structural integrity of the preform without affecting production efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1This is a schematic diagram of the preform heating device for a blow molding machine provided by this utility model. Figure 1 .

[0016] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0017] Figure 3 This is a schematic diagram of the preform heating device for a blow molding machine provided by this utility model. Figure 2 .

[0018] Figure 4 This is a schematic diagram of the preform heating device for a blow molding machine provided by this utility model. Figure 3 .

[0019] Figure 5 This is a schematic diagram of the structure of the heating box.

[0020] Figure 6 This is a diagram showing the arrangement of the heating elements.

[0021] Explanation of icon numbers: 1-Heating box; 101-Panel; 102-Support plate; 103-Air outlet plate; 1031-Cooling air outlet; 104-Opening; 105-Air inlet; 2-Heating tube; 3-Reflector; 4-First baffle plate; 5-Second baffle plate; 6-Drive mechanism; 601-Slide table; 7-Connecting rod; 8-Third baffle plate; 9-Air supply pipe; 10-Blower; 11-Air distribution plate; 111-Air inlet; 12-Guide rod; 13-Fixing frame; 131-First support plate; 132-Second support plate; 14-Guide sleeve; 15-Air delivery pipe; 16-End cap; 161-Outlet hole; 17-Screw; 18-Nut; 19-Pipe joint; 20-Preform. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0024] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0025] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0026] Please see Figures 1 to 6 This utility model provides a preform heating device for a blow molding machine. The preform heating device is used in the blow molding machine to heat the preform 20 to be conveyed to the blow molding die of the blow molding machine.

[0027] Specifically, the preform heating device of the blow molding machine includes a heating box 1, a heating tube 2, a reflector 3, a first baffle plate 4, a second baffle plate 5, a drive mechanism 6, a connecting rod 7, and two third baffle plates 8.

[0028] The heating chamber 1 can be fixed to the machine base of the blow molding machine by means of a support frame. An opening 104 is provided on the inner side of the heating chamber 1, and a reflector 3 is vertically arranged and opposite the opening 104, thereby forming a heating channel between the opening 104 and the reflector 3. The heating tubes 2 can be infrared heating tubes 2, and they are distributed vertically at intervals within the heating chamber 1. When the heating tubes 2 are working, the heat generated by the heating tubes 2 is transferred to the heating channel through the opening 104, thereby heating the preform 20 conveyed to the heating channel.

[0029] The first wind deflector 4 is horizontally positioned above the reflector 3, and the second wind deflector 5 is horizontally positioned below the reflector 3; while the two third wind deflectors 8 are vertically positioned at the front end of the reflector 3. Figure 1 The direction indicated by the middle arrow is the front and rear ends, and the third baffle 8 is connected to the inner side of the reflector 3. This invention, by setting the third baffle 8 at both the front and rear ends of the reflector 3, can prevent some hot air from escaping from the front and rear sides of the heating channel. Combined with the use of the first baffle 4 and the second baffle 5, this further extends the residence time of hot air in the heating channel, thereby reducing heat loss and further improving the heating effect of the heating device.

[0030] The driving mechanism 6 is located at the top of the heating chamber 1; the connecting rod 7 is horizontally positioned, with one end connected to the reflector 3 and the other end connected to the driving mechanism 6. When the preform 20 needs to enter or exit the heating channel of the heating device, the driving mechanism 6 drives the connecting rod 7 to push the reflector 3 away from the heating chamber 1. Figure 3 The movement (in the direction indicated by the arrow) ensures that the preform 20 is not blocked by the third baffle plate 8 when it enters or exits the heating channel, thus protecting the appearance and structural integrity of the preform 20 without affecting production efficiency.

[0031] It should be noted that the preform 20 can be conveyed using the conveying mechanism and preform 20 holder disclosed in CN209666232U. By installing a photoelectric probe on the side of the conveying mechanism, for example at the entrance of the heating channel, to detect the preform 20, the operating state of the drive mechanism 6 can be automatically controlled based on the detection signal from the photoelectric probe. When the photoelectric probe detects that the preform 20 is located at the entrance of the heating channel, the controller electrically connected to the drive mechanism 6 can automatically control the drive mechanism 6 based on the detection signal from the photoelectric probe. This causes the drive mechanism 6 to push the reflector 3 away from the heating chamber 1 via the drive connecting rod 7, allowing the preform 20 to normally enter and exit the heating device.

[0032] like Figure 1 and Figure 3 As shown, in an optional embodiment, an air outlet 105 is provided on the outer side of the heating chamber 1. A pipe connector 19 is detachably connected to the air outlet 105. The pipe connector 19 is connected to an air supply pipe 9, and the air supply pipe 9 is connected to a blower 10. When the blower 10 is working, it can supply air into the heating chamber 1 through the air supply pipe 9, which can replenish the air in the heating channel and promote the circulation of hot air, so that the preform 20 is heated more evenly.

[0033] like Figure 3 and Figure 5 As shown, in an optional embodiment, the air outlet 105 is provided with an air distribution plate 11; the air distribution plate 11 has a plurality of air inlets 111 spaced apart. The air distribution plate 11 can divert and buffer the airflow delivered to the air outlet 105, avoiding the airflow from directly impacting the interior of the heating chamber 1 and causing excessively high local wind speed or sudden temperature changes, so that the air entering the heating chamber 1 can be evenly distributed into the heating channel, which can prevent the problem of overheating or underheating of the preform 20 due to uneven airflow, and ensure the consistency of the heating effect of the preform 20.

[0034] It should be noted that the present invention does not limit the number of air outlets 105, and multiple air outlets 105 can be provided.

[0035] like Figure 1 , Figure 3 as well as Figure 4 As shown, in an optional embodiment, the driving mechanism 6 is a dual-axis slide table 601 cylinder, and the end of the connecting rod 7 is connected to the slide table 601 of the dual-axis slide table 601 cylinder. Compared with the single-axis driving mechanism 6, the synchronous driving characteristic of the dual-axis slide table 601 cylinder can provide more stable support and guidance for the slide table 601, effectively preventing the slide table 601 from deviating or shaking during the movement of the connecting rod 7, thereby ensuring that the preform 20 is not blocked by the third baffle plate 8 due to the displacement deviation of the reflector when entering and exiting the heating channel.

[0036] like Figure 4 As shown, in an optional embodiment, the preform heating device of the blow molding machine further includes a guide rod 12 and a fixing frame 13; the axial direction of the guide rod 12 is parallel to the axial direction of the connecting rod 7, and the guide rod 12 is fixed on the fixing frame 13; the lower part of the reflector 3 is movably sleeved on the guide rod 12. In this embodiment, the guide rod 12 can guide the lower part of the reflector 3, which can prevent the reflector 3 from tilting, shaking, or deviating when it is driven by the drive mechanism 6, because only the top is subjected to force. This ensures that the reflector 3 always moves smoothly in the preset direction, thereby ensuring that the preform 20 is not blocked by the third baffle plate 8 due to the displacement deviation of the reflector 3 when it enters and exits the heating channel. Moreover, the guide rod 12 can also disperse the force on the reflector 3 during its movement, reduce the load on the connecting rod 7 and the drive mechanism 6, and extend the service life of the drive mechanism 6.

[0037] like Figure 4 As shown, in an optional embodiment, the fixing frame 13 includes a horizontally arranged first support plate 131 and a vertically arranged second support plate 132 on the first support plate 131; the first support plate 131 can be fixed to the machine base of the blow molding machine. The guide rod 12 is fixedly inserted through the second support plate 132; a guide sleeve 14 is fixed to the outside of the reflector 3; the guide sleeve 14 is movably sleeved on the guide rod 12, which can reduce the frictional loss between the reflector 3 and the guide rod 12.

[0038] like Figure 1 , Figure 3 as well as Figure 5As shown, in an optional embodiment, the heating box 1 includes a U-shaped panel 101, a support plate 102 horizontally disposed inside the panel 101, and an air outlet plate 103 horizontally disposed inside the panel 101 and located below the support plate 102; the driving mechanism 6 is disposed on the support plate 102; the air outlet plate 103 has an air cavity inside, and a plurality of cooling air outlet holes 1031 are spaced apart on the side of the air outlet plate 103 facing the reflector 3; the cooling air outlet holes 1031 communicate with the air cavity, and when the preform 20 is conveyed to the heating channel, the cooling air outlet holes 1031 face the threaded connection of the preform 20; an air delivery pipe 15 communicating with the air cavity is provided on the outside of the air outlet plate 103. In this embodiment, compressed air for cooling the threaded connection of the preform 20 can be conveyed into the air cavity through the air delivery pipe 15 to prevent the threaded connection of the preform 20 from deforming during heating and conveying.

[0039] It should be noted that the support plate 102 and the air outlet plate 103 can also prevent hot air from spreading upward and downward.

[0040] like Figure 6 As shown, in an optional embodiment, the two ends of the heating tube 2 are snapped with end caps 16; the end caps 16 are provided with outlet holes 161 for cables to pass through, so that the power supply cables of the heating tube 2 can pass through the outlet holes 161 in an orderly manner out of the end caps 16.

[0041] like Figure 6 As shown, in an optional embodiment, a screw 17 is connected to the end cap 16; the outer side of the heating box 1 is provided with a mounting hole for the screw 17 to pass through; a nut 18 is fitted onto the screw 17 and presses against the outer wall of the heating box 1, thereby realizing the detachable fixation of the heating tube 2 on the heating box 1. By adjusting the position of the nut 18 on the screw 17, the installation depth of the heating tube 2 in the heating box 1 can be finely adjusted, thereby ensuring that the heat generated by the heating tube 2 is evenly transferred to the heating channel.

[0042] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A preform heating device for a blow molding machine, comprising a heating box (1) with an opening (104) on its inner side, a heating tube (2) disposed in the heating box (1), a reflector (3) vertically arranged and opposite to the opening (104), a first baffle plate (4) horizontally disposed at the upper end of the reflector plate (3), and a second baffle plate (5) horizontally disposed at the lower end of the reflector plate (3), characterized in that, It also includes a drive mechanism (6), a connecting rod (7), and two third wind deflectors (8); the two third wind deflectors (8) are respectively vertically arranged at the front end and rear end of the reflector (3), and the third wind deflectors (8) are connected to the inner side of the reflector (3); the drive mechanism (6) is located at the top of the heating box (1); the connecting rod (7) is horizontally arranged, and one end of the connecting rod (7) is connected to the reflector (3), and the other end of the connecting rod (7) is connected to the drive mechanism (6) for transmission.

2. The preform heating device for a blow molding machine according to claim 1, characterized in that, An air outlet (105) is provided on the outside of the heating box (1). A pipe joint (19) is detachably connected to the air outlet (105). An air supply pipe (9) is connected to the pipe joint (19). A blower (10) is connected to the air supply pipe (9).

3. The preform heating device for a blow molding machine according to claim 2, characterized in that, The air outlet (105) is provided with an air distribution plate (11); the air distribution plate (11) has a plurality of air inlets (111) spaced apart.

4. The preform heating device for a blow molding machine according to claim 1, characterized in that, The drive mechanism (6) is a dual-axis slide cylinder, and the end of the connecting rod (7) is connected to the slide (601) of the dual-axis slide cylinder.

5. The preform heating device for a blow molding machine according to claim 1, characterized in that, It also includes a guide rod (12) and a fixing frame (13); the axial direction of the guide rod (12) is parallel to the axial direction of the connecting rod (7), and the guide rod (12) is fixed on the fixing frame (13); the lower part of the reflector (3) is movably sleeved on the guide rod (12).

6. The preform heating device for a blow molding machine according to claim 5, characterized in that, The fixing frame (13) includes a first support plate (131) set horizontally and a second support plate (132) set vertically on the first support plate (131); the guide rod (12) is fixedly inserted through the second support plate (132); a guide sleeve (14) is fixed on the outside of the reflector (3); the guide sleeve (14) is movably sleeved on the guide rod (12).

7. The preform heating device for a blow molding machine according to claim 1, characterized in that, The heating box (1) includes a panel (101) with a U-shaped horizontal cross section, a support plate (102) horizontally disposed inside the panel (101), and an air outlet plate (103) horizontally disposed inside the panel (101) and located below the support plate (102); the driving mechanism (6) is disposed on the support plate (102); the air outlet plate (103) has an air cavity inside, and a plurality of cooling air outlet holes (1031) are spaced apart on the side of the air outlet plate (103) facing the reflector (3); the cooling air outlet holes (1031) are connected to the air cavity; an air delivery pipe (15) connected to the air cavity is disposed on the outside of the air outlet plate (103).

8. The preform heating device for a blow molding machine according to claim 1, characterized in that, The heating tube (2) is fitted with end caps (16) at both ends; the end caps (16) are provided with outlet holes (161) for cables to pass through.

9. The preform heating device for a blow molding machine according to claim 8, characterized in that, A screw (17) is connected to the end cap (16); the outer side of the heating box (1) is provided with an installation hole for the screw (17) to pass through; a nut (18) is fitted on the screw (17) and pressed against the outer wall of the heating box (1).

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