CN102107523B - Horizontal type blow molding die for automobile oil tube and blow molding method thereof - Google Patents

Abstract

The invention discloses a horizontal blow molding mold for automobile oil pipes and a blow molding method thereof, comprising an upper mold (1), a lower mold (2) and a blow molding method. In the present invention, the blow molding mold is made into two matching molds corresponding to the upper and lower sides arranged horizontally. When working, the upper mold is raised, the lower mold is horizontally moved out and loaded into the tubular blank, the lower mold is reset, and the upper mold is pressed down to close the mold. , Blow air into the tubular blank to form bubbles, maintain pressure and cool, the blank is formed into a hollow tubing product, the mold is opened, the upper mold clamps the product and rises upward, the lower mold moves out horizontally, the upper mold releases the product, and the product falls and demoulds The technical solution is to provide a horizontal blow molding mold for automobile oil pipes. The horizontal mold is used to facilitate the insertion of the tubular blank into the curved cavity of the lower mold according to the shape of the oil pipe product. No flash is generated during molding, and the vertical mold is avoided. The many disadvantages caused by mold forming processing flash have made the blow molding of automobile oil pipes achieve the purpose of improving quality, saving raw materials, reducing costs, and saving energy and consumption.

Description

Horizontal blow molding mold for automobile oil pipe and blow molding method thereof

technical field

The invention relates to a blow molding mold, in particular to a horizontal blow molding mold for automobile oil pipes formed by horizontal blow molding and a blow molding method thereof.

Background technique

In the prior art, the blow molding of automobile tubing follows the method of vertical blow molding of plastic bottles. The vertical blow molding of plastic bottles is that the molten plastic extruded by the extruder is blown by the blowing die to make the diameter smaller than the diameter of the finished plastic bottle. The cylindrical bubble-shaped blank, the bubbles droop with the help of gravity, and are embedded in the cavity of the bottle shape in the second valve of the vertical device, which conforms to the mold. On the wall of the mold cavity, after cooling, the air bubbles are formed into hollow plastic bottles; the vertical blow molding of plastic bottles is to use gravity to make the air bubbles sag naturally, so that the air bubbles can be embedded in the mold and molded. However, because the automobile oil pipe is curved The projected area is much larger than the projected size of the solid body. Following the vertical blow molding tubing, the bubble blank must cover the projected area of the tubing product. Integrate a large area of flash, so it is necessary to cut off the flash through a trimming mold. After the flash is removed, a cut mark will be left on the tubing product, and the cut flash will be sent to crushing, granulation, and processed. Recycled materials are downgraded for use. Flash cut marks not only affect the appearance quality of the oil pipe, but also affect the mechanical strength and quality of the oil pipe structure due to the uneven thickness of the pipe wall at the cut mark, which is prone to damage and leakage accidents during use; Consumption, and the downgrading of recycled materials leads to serious loss of new materials and increases the cost of products; therefore, the existing technology has problems and deficiencies such as poor quality, hidden dangers of leakage accidents, high cost, high energy consumption, and serious waste of raw materials.

Contents of the invention

Aiming at the problems and deficiencies in the above-mentioned prior art, the present invention adopts the blow molding mold to be made into two matching molds corresponding to the upper and lower sides arranged horizontally. The blowing die is blown into a hollow tubular blank with a diameter smaller than the finished oil pipe, and the hollow tubular blank is placed into the cavity of the lower mold according to the shape of the curved oil pipe product by the manipulator. When the mold is closed, the lower mold is reset, and the upper mold is pressed down to match the mold , after blowing air into the tubular blank, the bubble wall of the inflated blank is attached to the wall of the mold cavity, after cooling, the air bubbles are formed into a hollow oil pipe product, the mold is opened, the upper mold clamps the oil pipe product and rises upward, and the lower mold The mold moves out horizontally, the upper mold releases the oil pipe product, and the oil pipe product falls and demoulds the technical scheme. It provides a horizontal blow molding mold for automobile oil pipe and its blow molding method. The shape of the product is placed in the curved cavity of the lower mold, and there is no flash during molding, which avoids many disadvantages caused by vertical mold forming processing flash, so that the blow molding of automobile tubing can improve quality, save raw materials, and reduce costs , The purpose of saving energy and reducing consumption.

The purpose of the present invention is achieved in this way: a horizontal blow molding mold for automobile oil pipes and a blow molding method thereof, including an upper mold, a lower mold and a blow molding method, wherein: the upper mold is fixed during work The upper half of the horizontal blow molding mold that moves up and down on the vertical lifting table above the horizontal blow molding machine; the lower end of the upper mold is provided with an upper half that matches the shape of the upper half of the outer wall of the curved tubing product Valve cavity: located on both sides of the upper half of the valve cavity of the upper mold, there are several demoulding clamps composed of moving sliders driven by respective cylinders, and the contact surface between the demoulding clamp and the oil pipe product is provided with two sides of the oil pipe product. The shape of the outer wall matches the shape; it is located at the two ends of the upper half of the cavity of the upper mold, one end is equipped with a blowing needle and the other end is equipped with an exhaust needle, and is driven by the blowing needle cylinder and the needle row cylinder respectively; The two ends of the upper half of the cavity are equipped with an upper mechanism for port extrusion molding of oil pipe products composed of surface sliders driven by several oil cylinders;

The lower mold is the lower half of the horizontal blow molding mold that is fixed on the horizontal mobile workbench under the horizontal blow molding machine for horizontal movement during operation; the upper end of the lower mold is provided with a curved oil pipe product The lower half of the outer wall of the lower half of the lower half of the cavity is consistent in shape, and corresponds up and down with the upper half of the upper mold cavity; the lower mold is provided with a The chute for the sliding fit of the demoulding clip; the two ends of the lower half valve cavity under the upper mold are provided with a port extrusion molding lower mechanism for oil pipe products composed of surface sliders driven by several oil cylinders.

The blow molding method described (working principle)

The upper mold is fixedly installed on the vertical lifting table above the horizontal blow molding machine, and the lower mold is fixedly installed on the horizontal moving table below the horizontal blow molding machine;

step one,

The upper mold rises up and separates from the lower mold, and the lower mold moves outward horizontally. The molten plastic is extruded by the extruder and blown into a hollow tubular billet with a diameter smaller than that of the oil pipe product. The hollow tubular billet is quickly clamped by the manipulator. Put the hollow tubular blank into the cavity of the lower half of the lower mold at the two ends;

Step two,

The lower mold is reset horizontally, the upper mold is lowered and the lower mold is closed, the stripping clip is closed and wedged, and the bottom of the hollow tubular blank is stuck at the chute corresponding to the sliding fit between the lower mold and the stripping clip, and the blowing needle and the exhaust needle are respectively Insert the inner cavity of the hollow tubular blank, the blowing needle blows compressed air into the inner cavity of the hollow tubular blank from one end of the hollow tubular blank, and the exhaust needle blows the air volume from the other end of the hollow tubular blank at a rate less than that of the blowing needle Exhaust air from the inner cavity of the hollow tubular blank to maintain the positive pressure in the inner cavity of the hollow tubular blank, and always maintain the positive pressure airflow through the inner cavity of the hollow tubular blank, so as to bulge and attach the hollow tubular blank to the upper surface of the hollow tubular blank. On the wall of the cavity formed by the upper half valve cavity of the mold and the lower half valve cavity of the lower mold, at the same time, the port extrusion molding of the upper mold and the port extrusion molding of the lower mold The lower mechanism squeezes the hollow tubular blank that gradually bulges to form the port of the oil pipe product; in this way, the oil pipe product is shaped after cooling for ten seconds under pressure;

Step three,

Close the blowing needle and exhaust needle valve, the blowing needle and exhaust needle are drawn out from the two ends of the tubing product still in the cavity surrounded by the upper mold and the lower mold, and are set at the port of the upper mold to squeeze The forming upper mechanism and the port extrusion molding lower mechanism set on the lower mold are retreated and reset. The demoulding clamp of the upper mold clamps the oil pipe product and rises upward to separate from the lower mold. The lower mold moves outward horizontally, and the demoulding clamp is released. , the tubing product falls freely by gravity and is manually removed from the blow molding machine;

The manipulator puts the hollow tubular blank into the cavity of the lower half of the lower mold again, and the mold enters the next round of blow molding process, and so on.

Beneficial effect

The use of a horizontal mold is beneficial for the manipulator to directly load the hollow tubular blank with a diameter smaller than the diameter of the tubing product into the curved lower half valve cavity of the lower mold, and complete the blow molding in the combined mold cavity without flashing during molding, thereby Many disadvantages caused by the formation of flash edges during vertical mold molding are avoided.

As mentioned above, the present invention adopts the method of making the blow molding mold into the upper and lower corresponding two matching molds arranged horizontally and horizontally. For the hollow tubular blank of the finished oil pipe, the hollow tubular blank is placed into the cavity of the lower mold according to the shape of the curved oil pipe product by the manipulator. , the bubble wall of the bulging billet is attached to the wall of the mold cavity, after cooling, the bubbles are formed into a hollow oil pipe product, the mold is opened, the upper mold clamps the oil pipe product and rises upward, the lower mold moves out horizontally, and the upper mold releases the oil pipe The product and the technical solution of oil pipe product falling and demoulding overcome the problems and deficiencies of the existing technology, such as poor quality, hidden danger of leakage accident, high cost, high energy consumption, and serious waste of raw materials. A horizontal type of automobile oil pipe is provided The blow molding mold and its blow molding method use a horizontal mold to facilitate placing the tubular blank into the curved cavity of the lower mold according to the shape of the tubing product. No flash is generated during molding, and the flash caused by the vertical mold molding process is avoided. The many disadvantages of the automobile oil pipe blow molding have achieved the purpose of improving quality, saving raw materials, reducing costs, saving energy and reducing consumption.

Description of drawings

Fig. 1 is the principle structural representation of the horizontal blow molding mold of automobile tubing of the present invention;

Fig. 2 is the horizontal blow-molding mold of automobile tubing of the present invention, works when upper mold rises, and lower mold moves away, and the principle schematic diagram of the state when hollow tubular blank is inserted in the lower half valve cavity of lower mold;

Fig. 3 is the horizontal blow-molding mold of automobile oil pipe of the present invention, the schematic diagram of the working state when the lower mold is reset, the upper mold descends and the lower mold closes the mould;

Fig. 4 is the horizontal blow-molding mold of automobile oil pipe of the present invention, the schematic diagram of the working state when the blowing needle blows compressed air into the hollow tubular blank and the exhaust needle exhausts outward;

Fig. 5 is a horizontal blow molding mold for automobile oil pipe of the present invention, a schematic diagram of the working principle when the oil pipe product is cooled and formed in the mould;

Fig. 6 is a horizontal blow molding mold for automobile oil pipe of the present invention, a schematic diagram of the principle when the demoulding clip working on the upper mold clamps the oil pipe product and lifts up and separates from the lower mold;

Fig. 7 is the horizontal blow molding mold of the automobile oil pipe of the present invention, the schematic diagram of the working state when the lower mold is moved horizontally, the demoulding clip is loosened, and the oil pipe product falls;

Fig. 8 is a schematic bottom view of the upper mold of a practical application mold of the horizontal blow molding mold of the automobile oil pipe of the present invention;

Fig. 9 is a schematic plan view of the lower mold of a practical application mold of the horizontal blow molding mold for the automobile oil pipe of the present invention.

The present invention will be described in further detail below in conjunction with the embodiments in the accompanying drawings, but it should not be construed as any limitation to the present invention.

In the figure: upper mold 1, demoulding clamp 11, blowing needle 12, exhaust needle 13, blowing needle cylinder 14, needle row cylinder 15, lower mold 2, hollow tubular blank 21, tubing product 4, oil cylinder 01, cylinder 02 , Port extrusion molding upper mechanism 03, port extrusion molding lower mechanism 031, intake pipe 04, exhaust pipe 05.

Detailed ways

Referring to Figures 1 to 9, a horizontal blow molding mold for automobile oil pipes and a blow molding method thereof according to the present invention include an upper mold 1, a lower mold 2 and a blow molding method, wherein: the upper mold 1 It is the upper half of the horizontal blow molding mold that is fixed on the vertical lifting workbench above the horizontal blow molding machine during work and moves up and down; the lower end surface of the upper mold 1 is provided with the upper half of the curved oil pipe product 4 The upper half valve cavity whose outer wall shape matches; the two sides of the upper half valve cavity located on the upper mold 1 are symmetrically provided with a number of demoulding clamps 11 composed of movable sliders driven by respective cylinders, and the demoulding clamps 11 are connected with the oil pipe products 4. The contact surface is provided with a shape conforming to the shape of the outer walls of the two sides of the tubing product 4; at the two ends of the upper half of the cavity of the upper mold 1, one end is provided with an air blowing needle 12 and the other end is provided with an exhaust needle 13, and respectively It is driven by the needle blowing cylinder 14 and the needle row cylinder 15; the two ends of the upper half of the cavity of the upper mold 1 are provided with the port extrusion molding upper mechanism 03 of the tubing product 4 composed of several oil cylinder-driven surface sliders;

The lower mold 2 is the lower half of the horizontal blow molding mold that is fixed on the horizontal mobile workbench below the horizontal blow molding machine for horizontal movement during operation; the upper end surface of the lower mold 2 is provided with a curved The outer wall of the lower half of the tubing product 4 has a lower half valve cavity that matches the shape of the upper half valve cavity of the upper mold 1; the lower mold 2 is above and below the demoulding clamp 11 of the upper mold 1 The corresponding position is provided with a chute that slides and fits with the demoulding clamp 11; the two ends of the lower half valve cavity located under the upper mold are provided with a port extrusion port of the oil pipe product 4 composed of several oil cylinder-driven surface sliders. Form the lower mechanism 031.

The blow molding method described (working principle)

The upper mold 1 is fixedly installed on the vertical lifting table above the horizontal blow molding machine, and the lower mold 2 is fixedly installed on the horizontal moving table below the horizontal blow molding machine;

step one,

The upper mold 1 rises upwards and separates from the lower mold 2, and the lower mold 2 moves outward horizontally. The molten plastic is extruded by the extruder and blown into a hollow tubular blank 21 with a diameter smaller than the tubing product 4. Clamp the two ends of the hollow tubular blank 21 and put the hollow tubular blank 21 into the cavity of the lower half of the lower mold 2;

Step two,

The lower mold 2 is reset horizontally, the upper mold 1 is lowered and the lower mold 2 is closed, the stripping clamp 11 is closed and wedged into the bottom of the hollow tubular blank 21 from the chute where the lower mold 2 and the stripping clamp 11 are slidably matched, and blown The air needle 12 and the exhaust needle 13 are respectively inserted into the inner cavity of the hollow tubular blank 21, the blowing needle 12 blows compressed air into the inner cavity of the hollow tubular blank 21 from one end of the hollow tubular blank 21, and the exhaust needle 13 blows compressed air from the hollow tubular blank 21. The other end of the blank 21 exhausts air from the inner cavity of the hollow tubular blank 21 with a smaller air volume than the blowing needle 12, so as to maintain the positive pressure in the inner cavity of the hollow tubular blank 21 and maintain the positive pressure airflow all the time. Through the inner cavity of the hollow tubular blank 21, the hollow tubular blank 21 is bulged and attached to the cavity wall surrounded by the upper half of the cavity of the upper mold 1 and the lower half of the cavity of the lower mold 2. At the same time, the port extrusion forming upper mechanism 03 arranged on the upper die 1 and the port extrusion forming lower mechanism 031 arranged on the lower die 2 extrude the gradually bulging hollow tubular blank 21 to form the port of the tubing product 4; Ten seconds tubing product 4 finalized;

Step three,

Close the blowing needle 12 and the exhaust needle 13 valves, the blowing needle 12 and the exhaust needle 13 are drawn out from the two ends of the tubing product 4 still in the mold cavity surrounded by the upper mold 1 and the lower mold 2, and set The port extrusion molding upper mechanism 03 of the upper mold 1 and the port extrusion lower mechanism 031 arranged on the lower mold 2 are retreated and reset, and the demoulding clamp 11 of the upper mold 1 holds the tubing product 4 and rises upward to the lower mold 2. Separated, the lower mold 2 is moved outward horizontally, the demoulding clamp 11 is loosened, and the tubing product 4 falls freely by gravity and is manually removed from the blow molding machine;

The manipulator puts the hollow tubular blank 21 into the lower half valve cavity of the lower mold 2 again, and the mold enters the next round of blow molding process, and so on.

Beneficial effect

The use of a horizontal mold is beneficial for the manipulator to directly load the hollow tubular blank with a diameter smaller than the diameter of the tubing product into the curved lower half cavity of the lower mold 2, and complete the blow molding in the combined mold cavity without flashing during molding. Thereby avoiding the many disadvantages caused by the formation of burrs during vertical mold molding.

Claims (2)

1. the horizontal blow molding mold of an automobile oil pipe, it is characterized in that: comprise patrix (1), counterdie (2), described patrix (1) is fixed on the first half of the horizontal blow molding mold that moves up and down on the vertical lifting work table above the horizontal blow moulding machine during for work; The lower surface of patrix (1) is provided with first slit bamboo or chopped wood die cavity that coincide with the first half outer wall shape of the oil pipe goods (4) of bending; First slit bamboo or chopped wood die cavity two sides that are positioned at patrix (1) are arranged with the demoulding folder (11) that some movable sliders that driven by cylinder separately consist of, and demoulding folder (11) is provided with the shape face that coincide with oil pipe goods (4) two side outer wall shapes with the contact-making surface of oil pipe goods (4); Be positioned at two ends of first slit bamboo or chopped wood die cavity of patrix (1), an end is provided with blowing needle (12) other end and is provided with exhaust needle (13), and is driven by blow needle cylinder (14) and row's pin cylinder (15) respectively; Two ends that are positioned at first slit bamboo or chopped wood die cavity of patrix (1) are provided with mechanism (03) in the port extrusion modling of the oil pipe goods (4) that the shape face slide block by some hydraulic oil cylinder driving consists of;

Described counterdie (2) is fixed on the latter half that moves horizontally the horizontal blow molding mold of doing the left and right horizontal motion on the workbench below the horizontal blow moulding machine during for work; The upper surface of counterdie (2) is provided with second slit bamboo or chopped wood die cavity that coincide with the Lower Half outer wall shape of the oil pipe goods (4) of bending, and corresponding up and down with first slit bamboo or chopped wood die cavity of described patrix (1); Counterdie (2) is upper corresponding position to be provided with the demoulding and to press from both sides the chute that (11) are slidingly matched up and down with the demoulding folder (11) of described patrix (1); Two ends that are positioned at second slit bamboo or chopped wood die cavity under the patrix are provided with mechanism (031) under the port extrusion modling of the oil pipe goods (4) that the shape face slide block by some hydraulic oil cylinder driving consists of.

2. the blow molding method of the horizontal blow molding mold of an automobile oil pipe, it is characterized in that: patrix (1) is fixedly mounted on the vertical lifting work table above the horizontal blow moulding machine, and counterdie (2) is fixedly mounted on moving horizontally on the workbench below the horizontal blow moulding machine;

Step 1,

Patrix (1) upwards rises and separates with counterdie (2), counterdie (2) level is outwards removed, extrude molten plastic by extruder and blow out diameter less than the hollow tubular blank (21) of oil pipe goods (4) through the air blowing die head, clamp rapidly hollow tubular blank (21) two ends by manipulator and hollow tubular blank (21) is inserted in second slit bamboo or chopped wood die cavity of counterdie (2);

Step 2,

Counterdie (2) horizontal reset, patrix (1) descends and counterdie 2 matched moulds, the bottom of hollow tubular blank (21) is blocked in the closed wedging of demoulding folder (11) from counterdie (2) and demoulding folder (11) corresponding chute that is slidingly matched, blowing needle (12) and exhaust needle (13) insert respectively the inner chamber of hollow tubular blank (21), blowing needle (12) is blown into compressed air from an end of hollow tubular blank (21) to the inner chamber of hollow tubular blank (21), exhaust needle (13) is from air capacity from the inner chamber of hollow tubular blank (21) the outwards exhaust of the other end to be blown into less than blowing needle (12) of hollow tubular blank (21), with the malleation in the inner chamber that keeps hollow tubular blank (21), and remain the inner chamber of malleation permeate gas stream hollow tubular blank (21), hollow tubular blank (21) heaved be attached on the die cavity wall that second slit bamboo or chopped wood die cavity matched moulds by first slit bamboo or chopped wood die cavity of patrix (1) and counterdie (2) surrounds, meanwhile, be arranged on mechanism (031) extruding is progressively heaved under the mechanism (03) and the port extrusion modling that is arranged on counterdie (2) in the port extrusion modling of patrix (1) hollow tubular blank (21) with the port of moulding oil pipe goods (4); So ten seconds oil pipe goods (4) of pressurize cooling typing;

Step 3,

Close blowing needle (12) and exhaust needle (13) valve, two ends of blowing needle (12) and exhaust needle (13) the oil pipe goods (4) from the die cavity that still is in patrix (1) and counterdie (2) matched moulds and surrounds are extracted out, be arranged in the port extrusion modling of patrix (1) that mechanism (031) rollback resets under the mechanism (03) and the port extrusion modling that is arranged on counterdie (2), (11) clamping of the demoulding of patrix (1) folder oil pipe goods (4) and is upwards risen and separate with counterdie (2), counterdie (2) level is outwards removed, demoulding folder (11) unclamps, and oil pipe goods (4) fall by manually shifting out blow molding machine by free gravity;

Manipulator is inserted hollow tubular blank (21) in second slit bamboo or chopped wood die cavity of counterdie (2) again, and mould enters the next round blow-moulding process, so goes round and begins again.

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