Longitudinal sealing mold temperature control system for strip-shaped bag packaging machine

Abstract

The utility model discloses a longitudinal sealing mold temperature control system for a strip-shaped bag packaging machine, which belongs to the field of packaging, and adopts a segmented heating mode, so that the service life of a heating rod is prolonged, and the tail end of the heating rod is prevented from being burnt due to overhigh temperature; and the longitudinal sealing welding surface of the strip-shaped bag packaging product is stably welded, is not welded and over-welded, and is attractive in appearance. The device mainly comprises a forming device, a longitudinal sealing mold is arranged on the forming device, a heating rod is arranged in the longitudinal sealing mold and comprises an upper-section heating rod A and a lower-section heating rod B, and the temperature of the upper-section heating rod A and the temperature of the lower-section heating rod B are controlled through a temperature control system. The strip-shaped bag packaging machine is mainly used for packaging strip-shaped bags.

Description

TECHNICAL FIELD

[0001] The utility model relates to the packaging and encapsulation field, and specifically, particularly relates to a longitudinal seal mould temperature control system for strip bag packaging machine. BACKGROUND

[0002] The multi-column strip bag packaging machine is compatible with multiple specifications, and the bag length of different loading products is different, so the equipment needs to meet multiple bag lengths, and the length of the longitudinal seal welding mould must be greater than the longest bag length to meet the continuous sealing of the strip bag. The length of the longitudinal seal mould is longer than the length of the bag pulled each time, and when welding the product of the shorter specification, the longitudinal seal edge of the strip bag product may be welded twice, such as a food packaging machine film longitudinal seal mechanism with the announcement number CN107826341B.

[0003] The upper part of the longitudinal seal mould is used for the first welding of the strip bag product, and due to the different welding bag lengths, the lower part of the longitudinal seal mould may exist a repeated welding area when the second welding, the longitudinal seal mould welds the new film material when the first welding of the film material, and the temperature loss of the mould is normal, but the welding of the film material by the lower part of the longitudinal seal mould belongs to the second welding, and the temperature loss is small, when the strip bag longitudinal seal edge is welded twice, the temperature of the lower part of the longitudinal seal mould is too high when continuously welding for a long time, and the probability of the longitudinal seal mould welding wrinkles appears, and the longitudinal seal welding quality is affected. UTILITY MODEL CONTENTS

[0004] The utility model discloses a longitudinal seal mould temperature control system for strip bag packaging machine, and the segmented heating mode improves the service life of the heating rod, prevents the heating rod end temperature from being too high and burning out, makes the longitudinal seal welding surface of the strip bag packaging product weld stably, and does not weld, and the appearance is good.

[0005] The utility model discloses a longitudinal seal mould temperature control system for strip bag packaging machine, and the segmented heating mode improves the service life of the heating rod, prevents the heating rod end temperature from being too high and burning out, makes the longitudinal seal welding surface of the strip bag packaging product weld stably, and does not weld, and the appearance is good.

[0006] A longitudinal seal mould temperature control system for strip bag packaging machine, comprising a former, a longitudinal seal mould is arranged on the former, a heating rod is arranged in the longitudinal seal mould, the heating rod comprises an upper segment heating rod A and a lower segment heating rod B, and the upper segment heating rod A and the lower segment heating rod B are controlled in temperature through a temperature control system.

[0007] Further, the upper segment heating rod A accounts for 2 / 3 of the total length of the heating rod, and the lower segment heating rod B accounts for 1 / 3 of the total length of the heating rod.

[0008] Further, the temperature control system includes a thermocouple BT1, a voltage regulating module TY and a solid state relay GK1, the thermocouple BT1 is installed at the middle position of the longitudinal sealing mold and at the upper heating rod A, the upper heating rod A is connected with the solid state relay GK1, the lower heating rod B is connected with the voltage regulating module TY, the voltage regulating module TY is connected with the solid state relay GK1, and the thermocouple BT1 is connected with the solid state relay GK1.

[0009] Further, the solid state relay GK1 is further connected with a circuit breaker QF1.

[0010] Further, the temperature control system includes a thermocouple BT2, a thermocouple BT3, a solid state relay GK2 and a solid state relay GK3, the thermocouple BT2 is installed at the upper part of the longitudinal sealing mold and at the upper heating rod A, the thermocouple BT3 is installed at the lower part of the longitudinal sealing mold and at the lower heating rod B, the solid state relay GK2 is connected with the upper heating rod A and the thermocouple BT2 respectively, and the solid state relay GK3 is connected with the lower heating rod B and the thermocouple BT3 respectively.

[0011] Further, the solid state relay GK2 and the solid state relay GK3 are connected with the circuit breaker QF2.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1. The sectional heating mode makes the longitudinal sealing welding surface of the strip-shaped bag packaging product stable, and the appearance is good.

[0014] 2. The service life of the heating rod is prolonged, and the end temperature of the heating rod is prevented from being too high to burn out.

[0015] 3. The strip-shaped bag packaging machine is ensured to continuously and stably operate for a long time. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the structural schematic view of the former and the longitudinal sealing mold of the utility model;

[0017] Figure 2 is the structural schematic view of the sectional heating rod of the utility model;

[0018] Figure 3 is the schematic view of the utility model during operation;

[0019] Figure 4 is the control principle diagram of the embodiment 2 of the utility model;

[0020] Figure 5 is the installation position schematic view of the thermocouple BT1 of the embodiment 2 of the utility model;

[0021] Figure 6is the control principle diagram of embodiment 3 of the utility model;

[0022] Figure 7 is the installation position schematic view of thermocouple BT2 and thermocouple BT3 of embodiment 3 of the utility model.

[0023] In the drawing: 1, former; 2, longitudinal sealing mold. DETAILED DESCRIPTION

[0024] The utility model will be further described with reference to the drawings.

[0025] Embodiment 1

[0026] As Figure 1 Indicated, a longitudinal sealing mold temperature control system for strip bag packaging machine, including former 1, be equipped with longitudinal sealing mold 2 on former 1, be equipped with heating rod in longitudinal sealing mold 2, the heating rod includes upper section heating rod A and lower section heating rod B, and upper section heating rod A and lower section heating rod B all control temperature by temperature control system;As Figure 2 Indicated, the upper section heating rod A accounts for 2 / 3 of total length of heating rod, and lower section heating rod B accounts for 1 / 3 of total length of heating rod. When continuous strip bag product transverse sealing welding pull film as Figure 3 Indicated, the length of longitudinal sealing mold 2 needs to be longer than the length of bag. The heating wire of upper section heating rod A and lower section heating rod B is evenly distributed.

[0027] Embodiment 2

[0028] As Figure 4 Indicated, a longitudinal sealing mold temperature control system for strip bag packaging machine, the temperature control system control temperature includes thermocouple BT1, pressure regulating module TY and solid-state relay GK1, as Figure 5 Indicated, thermocouple BT1 is installed at the middle position of longitudinal sealing mold 2 and is located at upper section heating rod A, and upper section heating rod A is connected with the 2 end of solid-state relay GK1, and lower section heating rod B is connected with the L1 end of pressure regulating module TY, and the T1 end of pressure regulating module TY is connected with the 2 end of solid-state relay GK1, and thermocouple BT1 is connected with the 4 end of solid-state relay GK1;The 1 end of solid-state relay GK1 is also connected with circuit breaker QF1, and other aspects are same with embodiment 1. When continuously operating, pressure regulating module TY gradually reduces pressure along with operating time, and after reducing to certain proportion, maintains low pressure heating, to control the heating power of lower section heating rod B, to solve the problem of repeatedly welding area temperature being too high. Pressure regulating module TY is prior art.

[0029] Thermocouple BT1, located in the middle of longitudinal sealing mold 2, monitors the upper mold temperature. Solid-state relay GK1 heats both upper and lower heating rods A and B simultaneously. A voltage regulator module TY is connected in series with lower heating rod B, reducing its voltage and power. The specific voltage drop depends on the bag length of the product being produced. Voltage regulator module TY is controlled by the analog output module of the stick-pack packaging machine's control system. A 0-10V analog control signal from voltage regulator module TY is controlled by the PLC's analog output module. Control mode: During static operation, voltage regulator module TY heats at 100%. During continuous operation, the voltage regulator percentage is gradually reduced as a timer ticks. The minimum voltage percentage varies for products of different bag lengths, and the timer timing varies accordingly. After shutdown, the voltage regulator percentage is gradually increased as the timer ticks. Continuous operation prevents temperature accumulation in the lower mold and prevents overheating.

[0030] Example 3

[0031] like Figure 6 As shown, a temperature control system for a longitudinal sealing mold of a strip bag packaging machine, the temperature control system includes a thermocouple BT2, a thermocouple BT3, a solid-state relay GK2 and a solid-state relay GK3, as shown in FIG. Figure 7 As shown, the thermocouple BT2 is installed on the upper part of the longitudinal sealing mold 2 and is located at the upper heating rod A, the thermocouple BT3 is installed on the lower part of the longitudinal sealing mold 2 and is located at the lower heating rod B, the 2 ends of the solid-state relay GK2 are connected to the upper heating rod A, the 4 ends of the solid-state relay GK2 are connected to the thermocouple BT2, the 2 ends of the solid-state relay GK3 are connected to the lower heating rod B, the 4 ends of the solid-state relay GK3 are connected to the thermocouple BT3, and the 3 ends of the solid-state relay GK2 are connected to the 3 ends of the solid-state relay GK3; 1 end of the solid-state relay GK2 and 1 end of the solid-state relay GK3 are both connected to the circuit breaker QF2, and the rest are the same as Example 1.

[0032] The upper thermocouple BT2 detects the temperature of the upper mold, and the lower thermocouple BT3 detects the temperature of the lower mold. The solid-state relay GK2 controls the heating of the upper heating rod A, and the solid-state relay GK3 controls the heating of the lower heating rod B. The two solid-state relays independently control the upper and lower sections of the heating rod, and then use the PID temperature control system (existing technology) for independent temperature control. Continuous operation will not cause the accumulated temperature of the lower mold to be too high.

Claims

1. A longitudinal sealing die temperature control system for a stick pack packaging machine, comprising a former (1) provided with a longitudinal sealing die (2) provided with a heating rod in the longitudinal sealing die (2), characterized in that: The heating rod comprises an upper heating rod A and a lower heating rod B, and the upper heating rod A and the lower heating rod B are both controlled by a temperature control system.

2. The longitudinal seal die temperature control system for a stick pack machine of claim 1, wherein: The upper heating rod A accounts for 2 / 3 of the total length of the heating rod, and the lower heating rod B accounts for 1 / 3 of the total length of the heating rod.

3. The longitudinal-sealing-mold temperature-control system for a bag-on-chip packaging machine according to claim 1 or 2, characterized in that: The temperature control system comprises a thermocouple BT1, a voltage regulating module TY and a solid-state relay GK1, the thermocouple BT1 is installed at the middle position of the longitudinal sealing mold (2) and at the upper heating rod A, the upper heating rod A is connected with the solid-state relay GK1, the lower heating rod B is connected with the voltage regulating module TY, the voltage regulating module TY is connected with the solid-state relay GK1, and the thermocouple BT1 is connected with the solid-state relay GK1.

4. The longitudinal seal die temperature control system for a stick pack machine of claim 3, wherein: The solid-state relay GK1 is further connected with a circuit breaker QF1.

5. The longitudinal-sealing-mold temperature-control system for a bag-on-chip packaging machine according to claim 1 or 2, characterized in that: The temperature control system comprises a thermocouple BT2, a thermocouple BT3, a solid-state relay GK2 and a solid-state relay GK3, the thermocouple BT2 is installed at the upper heating rod A at the upper part of the longitudinal sealing mold (2), the thermocouple BT3 is installed at the lower heating rod B at the lower part of the longitudinal sealing mold (2), the solid-state relay GK2 is connected with the upper heating rod A and the thermocouple BT2 respectively, and the solid-state relay GK3 is connected with the lower heating rod B and the thermocouple BT3 respectively.

6. The longitudinal seal die temperature control system for a stick pack machine of claim 5, wherein: The solid-state relay GK2 and the solid-state relay GK3 are both connected with the circuit breaker QF2.

Images