CN109437518B

CN109437518B - Special device for preheating mould

Info

Publication number: CN109437518B
Application number: CN201811287361.3A
Authority: CN
Inventors: 周正
Original assignee: Chongqing Xingyuan Glassware Co ltd
Current assignee: Chongqing Xingyuan Glassware Co ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2021-05-28
Anticipated expiration: 2038-10-31
Also published as: CN109437518A

Abstract

The patent relates to the field of auxiliary equipment of molds and discloses a special device for preheating a mold, which comprises a base, wherein a lifting mechanism is vertically arranged on the base, the upper end of the lifting mechanism is movably connected with a movable rod, a heating sleeve is connected onto the movable rod in a sliding manner, and the heating sleeve is connected with a power supply; the lifting mechanism comprises a motor, an output shaft of the motor is connected with a worm, the worm is meshed with a worm wheel, a lead screw is vertically meshed at the central hole of the worm wheel, the upper end of the lead screw is fixedly connected with one end of a moving rod, and a baffle for preventing the worm wheel from axially moving is arranged at the joint of the worm wheel and the worm; the heating jacket comprises two layers of arc-shaped heating nets which are arranged from top to bottom, a heat preservation layer is fixedly arranged on each heating net, one end of each two layers of heating nets is hinged with the same sliding sleeve, and the sliding sleeves are sleeved with the moving rods. This patent is anticipated is providing a simple structure and has the mould preheating isolated plant of heat preservation effect.

Description

Special device for preheating mould

Technical Field

The invention relates to the field of auxiliary equipment of molds, in particular to a special device for preheating a mold.

Background

In the daily glass blowing process, the mould is mostly adopted for shaping. Preheating is needed before the mold is used, because if the mold surface is not preheated, the contact surface of the high-temperature glass solution and the mold is subjected to size rapid shrinkage, the core temperature of the glass blow-molded part is uniformly reduced, and as a result, the surface of the glass blow-molded part is pulled apart to form cracks. In addition, the contact temperature of the glass solution and a cold mold can be rapidly reduced, so that the inner temperature and the outer temperature of a formed product are uneven, the appearance of a glass blow-molded part is not round and regular, and the shrinkage degree of the mold and the shrinkage degree of the glass blow-molded part are different.

In the early stage of the mold, the mold is preheated to about 250 ℃ for blow molding, so that the good combination effect between the glass solution and the mold cavity can be guaranteed. The prior art methods for preheating glass molds prior to blow molding are mainly of two types: firstly, adopting a welding gun for preheating; secondly, an electric furnace is adopted for preheating. In the former case, since the torch is preheated by heating the mold by combustion gas, the control difficulty is high, and it is difficult to make the mold obtain a uniform temperature, thereby affecting the blowing quality; in the latter case, the heating of the furnace is, on the one hand, lengthy and, on the other hand, not sufficient to ensure a uniform temperature of the mould, which also affects the quality of the spray welding, and the heating time is lengthy and wastes energy.

In the existing mold heating equipment, the whole mold is fixed on special equipment for heating, so that the mold is very difficult to move and the cost is too high. For example: patent document No. CN102883490B discloses a glass mold heating device, which is characterized by comprising a frame (1), wherein a machine table (11) is formed at the top of the frame (1), a water circulation cooling mechanism cavity (12) is formed below the machine table (11), and a mold seat (111) is arranged on the surface of the machine table (11); the medium-frequency induction heating box lifting mechanism (2), and the medium-frequency induction heating box lifting mechanism (2) is fixed on the machine table (11); the medium-frequency induction heating box (3) is arranged on the medium-frequency induction heating box lifting mechanism (2) and is lifted along with the lifting of the medium-frequency induction heating box lifting mechanism (2), a coil (31) of the medium-frequency induction heating box (3) is positioned outside the box body of the medium-frequency induction heating box (3), the coil (31) is a tubular body with a hollow cavity (311), the coil (31) is formed into a coil-shaped structure with a mold probing cavity (312) in a repeated bending mode of a plurality of semicircles or a plurality of full circles, and the mold probing cavity (312) corresponds to the upper part of the mold placing seat (111); the water circulation cooling mechanism (4) is arranged in the water circulation cooling mechanism cavity (12), is connected with the coil (31) and forms a water cooling circulation loop with the hollow cavity (311); and the mold temperature detection mechanism (5) is arranged on the machine table (11) and corresponds to the mold placing seat (111). The technical scheme disclosed in the technical scheme has the advantages of complex structure, large volume and high cost.

Disclosure of Invention

The invention aims to provide a special device for preheating a mold, which aims to solve the problems of complex structure, large volume and high cost of the conventional mold preheating device.

Before the technical scheme for solving the problem is formed, the applicant carefully researches why the blowing effect of the blowing mold is still poor after the blowing mold is preheated in the glass blowing process, and through long-time experiments and deductions, the whole thickness of the existing blowing mold is between 5 and 8cm, the preheating means can only preheat the inner surface of the mold in a short time, and the actual preheating depth is only about 2.5cm on average. Therefore, when the preheating depth of the glass blow molding is shallow and only one side can be preheated, the heat can be dissipated from the inner cavity from two directions, one is directly dissipated into the air, and the other is transferred from the surface of the inner cavity to the inside of the mold and then dissipated into the air. Thus, the surface of the mold can only continuously dissipate heat after removing the heat absorbed during heating, so that the surface temperature of the inner cavity of the mold is sharply reduced, the temperature can not be kept constant, and the heat can not be absorbed from other places.

Meanwhile, more than 80% of cavities of the blow mold are curved surfaces, and the heat dissipation of the curved surfaces is uneven under the condition of single-side preheating. The flat part has even and continuous heat dissipation, the curved surface has slow heat dissipation, and the heat dissipated can directly influence the heat absorption and heat dissipation conditions of the cavity surface right below, so that the overall temperature of the cavity surface is unbalanced, and the temperature directly has fatal influence on the blow molding quality after reaching 250 degrees. The applicant has verified that the following improvements have been made to the existing preheating of the mold after discovering this substantial problem by itself.

In order to solve the technical problems, the technical scheme is provided, and the special device for preheating the die comprises a base, wherein a lifting mechanism is vertically arranged on the base, the upper end of the lifting mechanism is movably connected with a moving rod, a heating sleeve is connected onto the moving rod in a sliding manner, and the heating sleeve is connected with a power supply; the heating jacket includes the heating net of the two-layer arcwall face that sets up from top to bottom, and the one end of two-layer heating net articulates respectively has same sliding sleeve, and sliding sleeve and carriage release lever cup joint.

The technical principle of the scheme is as follows: the base is fixed on the ground or a workbench of the mold, and the height of the lifting mechanism is adjusted so as to adjust the height of the heating sleeve on the movable rod, so that the surface of the inner cavity of the mold and the outer surface of the mold for glass blow molding can be simultaneously heated by the heating sleeve.

The beneficial effect of this scheme does:

1. this scheme simple structure utilizes the heating network of two-layer arcwall face to heat simultaneously interior cavity surface of mould and mould surface, and like this after the stop heating, the mould surface also can transmit the interior cavity surface of mould when heating absorbing heat, can reduce the too fast problem of interior cavity surface heat loss effectively like this.

2. Utilize elevating system to adjust the height of heating net in this scheme, it is simple, convenient to adjust, the workman's operation of being convenient for.

Further, elevating system includes the motor, and the output shaft of motor is connected with the worm, and the worm meshes has the worm wheel, and the centre bore department of worm wheel meshes vertically has the lead screw, lead screw upper end and carriage release lever one end rigid coupling, and the worm wheel is equipped with the baffle that prevents worm wheel axial displacement with the worm junction. The motor drives the worm to rotate, the worm is meshed with the worm wheel to rotate, the worm wheel only rotates and does not move due to the baffle, and the screw rod does not rotate along with the worm wheel due to the stop piece. At the moment, the screw rod and the worm wheel do nut motion, the screw rod does linear motion, the screw rod moves upwards under the driving of the worm wheel, and the moving rod moves upwards together.

Further, the side of heating network is followed all along length direction rigid coupling and is had a plurality of heat-resisting fiber rope, the fixed rigid connecting pipe that has cup jointed of one end of keeping away from the heating network on the heat-resisting fiber rope, be equipped with the magnetic clamping groove on the connecting pipe, the magnetic clamping groove cooperation has the magnetism fixture block, the magnetism fixture block is connected with the U-shaped clamp, vertically be equipped with the removal spout of magnetism fixture block on the U-shaped clamp, U-shaped clamp symmetric connection has the balancing weight, the heating network on upper strata is close to heat-resisting fiber rope department and still is equipped with the gyro wheel, heat-resisting fiber rope. When preheating, because the die cavity is the curved surface structure, so the heating middle part is sunken, behind heating net middle part and the die cavity laminating, the border of heating net always can the perk, can not laminate with the mould completely, the laminating can cause preheating of die cavity border department insufficient, the temperature and the die cavity middle part have certain temperature difference, but after stopping heating, the heat dissipation at die cavity border is the fastest, can strengthen the temperature difference like this, lead to the glass bottle to have crackle or deformation here easily, influence the yield, so utilize above-mentioned structure with heating net border and the laminating of die cavity border by force. In this technical scheme, utilize behind a plurality of heat-resisting fiber rope winding gyro wheels flagging, make heat-resisting fiber rope can straighten along the gyro wheel and tighten, magnetism each other attracts between magnetic clamping groove and the magnetic fixture block on the heat-resisting fiber rope, and the magnetic fixture block sets up on the U-shaped clamp, and the balancing weight is connected perpendicularly to the below of U-shaped clamp. Can force the laminating with the die cavity with the heating network side edge under the effect of balancing weight like this to guarantee that whole die cavity and heating network are fully laminated, preheat evenly.

Further, the heating net comprises a linear heating wire and a spiral heating wire, the end of the linear heating wire is connected into a rectangular frame structure, and the spiral heating wire is fixedly connected inside the rectangular frame. The straight heating wires are connected into a rectangular frame structure in a terminating manner, so that the whole heating wires are convenient to fix, and the heat-insulating layer is convenient to solidify. Meanwhile, the spiral heating wire can effectively prolong the length of the heating wire in a limited space and increase the resistance of the heating wire, so that the heating quantity of the heating wire is larger when the heating wire is heated.

Furthermore, the heating net is formed by criss-cross arrangement of linear heating wires. The heating wire is convenient to install and manufacture, and the replacement and maintenance of a single heating wire are convenient.

Furthermore, a heat-insulating layer is fixedly arranged on the heating net, and a gap is arranged between the heat-insulating layer and the heating net. The heat preservation layer that can be better, avoid the heat preservation layer direct and heater strip contact production adhesion for a long time.

Furthermore, the heat preservation layer is a high-temperature-resistant rubber layer structure. Simple structure, convenient installation and replacement.

Further, the heat-insulating layer is of a high-temperature-resistant fiber layer structure. Simple structure, convenient installation and replacement.

Drawings

FIG. 1 is a front view of a mold preheating-dedicated apparatus according to embodiment 1 of the present invention;

FIG. 2 is a top view of a special apparatus for preheating a mold in embodiment 1 of the present invention;

FIG. 3 is a schematic view showing the structure of a heating net in example 1 of the present invention;

FIG. 4 is a structural front view of a side edge of a heating screen in example 1 of the present invention;

fig. 5 is a schematic structural view of a heating network in embodiment 2 of the present invention.

Detailed Description

The present invention will be described in further detail below by way of specific embodiments:

reference numerals in the drawings of the specification include: the heat-insulation and heat-preservation combined type heating device comprises a base 1, a moving rod 2, a power supply 3, a motor 4, a worm 5, a worm wheel 6, a lead screw 7, a baffle plate 8, a heating net 9, a heat-insulation layer 10, a sliding sleeve 11, a linear heating wire 12, a spiral heating wire 13, a heat-resistant fiber rope 14, a roller 15, a connecting pipe 16, a magnetic clamping groove 17, a magnetic clamping block 18, a U-shaped clamping hoop 19, a moving sliding groove 20 and a balancing weight.

Example 1, as shown in figures 1, 2, 3 and 4:

the special device for preheating the die comprises a base 1, wherein a lifting mechanism is vertically arranged on the base 1, the upper end of the lifting mechanism is movably connected with a movable rod 2, a heating sleeve is connected onto the movable rod 2 in a sliding manner, and the heating sleeve is connected with a power supply 3; the lifting mechanism comprises a motor 4, an output shaft of the motor 4 is connected with a worm 5, the worm 5 is meshed with a worm wheel 6, a lead screw 7 is vertically meshed at the central hole of the worm wheel 6, the upper end of the lead screw 7 is fixedly connected with one end of the movable rod 2, and a baffle 8 for preventing the worm wheel 6 from axially moving is arranged at the joint of the worm wheel 6 and the worm 5; the heating jacket comprises two layers of arc-shaped heating nets 9 which are arranged from top to bottom, a heat insulation layer 10 is fixedly arranged on the heating nets 9, one ends of the two layers of heating nets 9 are respectively connected with the same sliding sleeve 11 through clockwise rotation of a rotating shaft, and the sliding sleeve 11 is sleeved with the moving rod 2.

The heating net 9 comprises a linear heating wire 12 and a spiral heating wire 13, the linear heating wire 12 is connected into a rectangular frame structure in a terminating mode, and the spiral heating wire is fixedly connected inside the rectangular frame. A gap is arranged between the heat-insulating layer 10 and the heating net 9, and the heat-insulating layer 10 is of a high-temperature-resistant rubber layer structure.

The side edge of the heating net is evenly and fixedly connected with one end of a plurality of heat-resistant fiber ropes 14, the side edge of the heating net is provided with a roller 15 along the side of each heat-resistant fiber rope 14, and the free end of the heat-resistant fiber rope 14 is naturally drooped after being wound around the roller 15. The end, far away from the heating net, of the heat-resistant fiber rope 14 is fixedly sleeved with a rigid connecting pipe 16, the connecting pipe 16 is of a rigid pipe structure, a rectangular magnetic clamping groove 17 is transversely arranged on the connecting pipe 16, a rectangular magnetic clamping block 18 is adsorbed on the magnetic clamping groove 17, a moving sliding groove 20 symmetrical relative to the magnetic clamping block 18 is arranged on the U-shaped hoop 19, the magnetic clamping block 18 can longitudinally move in the moving sliding groove 20, the U-shaped hoop 19 is symmetrically connected with a circular balancing weight 21, and the U-shaped hoop 19 is fixedly connected with the sliding sleeve 11 through a spring.

In the specific implementation process, the base 1 is fixed on the ground or a workbench of a mold, the motor 4 drives the worm 5 to rotate, the worm 5 is meshed with the worm wheel 6 to rotate, the worm wheel 6 only rotates and does not move due to the baffle 8, and the screw rod 7 does not rotate along with the worm wheel 6 due to the stop block. At the moment, the screw rod 7 makes a linear motion, and the screw rod 7 moves upwards under the driving of the worm wheel 6, so that the moving rod 2 moves upwards together. When the movable rod is lifted to a designated position, the position of the heating jacket can be transversely adjusted by adjusting the position of the sliding sleeve 11.

The heat-resistant fiber ropes 14 of the upper heating net are wound on the rollers 15 at the respective sides, the heat-resistant fiber ropes 14 of the lower heating net are wound on the closest roller 15 on the upper heating net, and then the free ends of the heat-resistant fiber ropes 14 naturally droop. Then the magnetic clamping groove 17 and the magnetic clamping block 18 are mutually attracted by vertically sliding the position of the magnetic clamping block 18 in the movable sliding groove 20. At this moment, the balancing weight 21 can drive the heat-resistant fiber rope 14 to be tightened vertically downwards, so that the heat-resistant fiber rope 14 drives the side edge of the upper heating net to be attached downwards, and drives the side edge of the lower heating net to be attached upwards, thereby ensuring that the heating net is attached to the cavity fully and uniformly preheated.

Finally, the power supply 3 is made to supply electric power to the heating grid 9, and the heating grid 9 is made to generate heat. This allows the heating screen 9 to simultaneously contact the inner and outer surfaces of the mold. Therefore, after the heating is stopped, the heat absorbed by the outer surface of the mold during the heating can be transferred to the surface of the inner cavity of the mold, so that the excessive heat loss of the surface of the inner cavity can be effectively reduced. In the heat transfer process, the heat absorbed by the outer surface can be diffused to the inside of the mold, namely the middle layer of the mold, so that the temperature difference between the inner cavity of the mold and the middle layer of the mold is small, the heat transfer is slow, the heat transfer can be mutually diffused, and the inner cavity of the mold is insulated.

In addition, the straight heating wires 12 are connected in a ending manner to form a rectangular frame structure, so that the whole heating wires are convenient to fix, and the heat-insulating layer 10 is convenient to solidify. Meanwhile, the spiral heating wire can effectively prolong the length of the heating wire in a limited space and increase the resistance of the heating wire, so that the heating quantity of the heating wire is larger when the heating wire is heated. The heat-insulating layer 10 is a high-temperature-resistant rubber layer structure. Simple structure, convenient installation and replacement. A gap is arranged between the heat-insulating layer 10 and the heating net 9. The heat preservation layer 10 can be better protected, and the adhesion caused by the long-term direct contact of the heat preservation layer 10 and the heating wires is avoided.

Example 2, as shown in figure 5:

different from the embodiment 1, the heating net 9 is formed by criss-cross arrangement of linear heating wires, so that the installation and the manufacture of the heating wires are convenient, and the replacement and the maintenance of a single heating wire are convenient. The heat-insulating layer 10 is a high-temperature-resistant fiber layer structure, and is simple in structure and convenient to install and replace.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The mould preheats isolated plant, its characterized in that: the device comprises a base, wherein a lifting mechanism is vertically arranged on the base, the upper end of the lifting mechanism is movably connected with a movable rod, a heating sleeve is connected onto the movable rod in a sliding manner, and the heating sleeve is connected with a power supply; the heating sleeve comprises two layers of arc-shaped heating nets which are arranged up and down, one ends of the two layers of heating nets are respectively hinged with a same sliding sleeve, and the sliding sleeves are sleeved with the moving rods; the side of heating net all has a plurality of heat-resisting fiber rope along the length direction rigid coupling on following, the fixed rigid connecting pipe that has cup jointed of one end of keeping away from the heating net on the heat-resisting fiber rope, be equipped with the magnetism draw-in groove on the connecting pipe, magnetism draw-in groove cooperates the magnetism fixture block, the magnetism fixture block is connected with the U-shaped clamp, vertically be equipped with the removal spout of magnetism fixture block on the U-shaped clamp, U-shaped clamp symmetric connection has the balancing weight, the heating net on upper strata is close to heat-resisting fiber rope department and still is equipped with the gyro wheel, it is flag.

2. The special apparatus for preheating mold according to claim 1, wherein: the lifting mechanism comprises a motor, an output shaft of the motor is connected with a worm, the worm is meshed with a worm wheel, a lead screw is vertically meshed at the central hole of the worm wheel, the upper end of the lead screw is fixedly connected with one end of a moving rod, and a baffle plate for preventing the worm wheel from moving axially is arranged at the joint of the worm wheel and the worm.

3. The special apparatus for preheating mold according to claim 1, wherein: the heating net comprises a linear heating wire and a spiral heating wire, the end of the linear heating wire is connected into a rectangular frame structure, and the spiral heating wire is fixedly connected inside the rectangular frame.

4. The special apparatus for preheating mold according to claim 1, wherein: the heating net is formed by arranging linear heating wires in a criss-cross mode.

5. The special apparatus for preheating mold according to claim 1, wherein: and a heat-insulating layer is fixedly arranged on the heating net, and a gap is arranged between the heat-insulating layer and the heating net.

6. The special apparatus for preheating mold according to claim 5, wherein: the heat preservation layer is of a high-temperature-resistant rubber layer structure.

7. The special apparatus for preheating mold according to claim 5, wherein: the heat-insulating layer is of a high-temperature-resistant fiber layer structure.