CN104816456B - A kind of closing device of desktop blowing device - Google Patents

Abstract

The invention discloses a sealing device of a desktop board blow molding device, which comprises a blow molding mouth, a blow mold clamping machine and a blow mold fixed inside the blow molding mold clamping machine, and the blow molding mouth is provided with an oval At the discharge port, the raw material is extruded in the shape of a ring-shaped curtain from the discharge port. Below the blow mold is a bottom sealing splint that automatically seals the bottom of the ring-shaped raw material. Automatic sealing equipment is used instead of manual sealing to improve work efficiency.

Description

A sealing device for a desktop board blow molding device

technical field

The invention relates to a sealing device of a desktop board blow molding device.

Background technique

Nowadays, many portable household items are made of plastic products, such as folding dining tables, chairs, etc., and the main tabletops of such dining tables are relatively large, so injection molding requires high equipment requirements and requires large-scale equipment. Therefore, the semi-finished products of this type of large panels are basically extruded after blow molding, that is, the raw materials are extruded in a continuous strip shape, and then extruded by the mold after extrusion. Now there are Problem: Because the raw material for making this kind of product is extruded downward in the form of a circular strip, the thickness of the strip-shaped raw material is relatively thin, and it is easy to flutter. The raw material band is easy to stick when fluttering. Manually seal the ring-shaped bottom to make it into a pocket shape, let the air blown out of the blow molding mouth fill the inner cavity of the sealed raw material belt, and squeeze it after the inner cavity is bulged, but the defect is that the manual sealing efficiency is too slow, and Sealing quality is not good.

Contents of the invention

The technical problem to be solved in the present invention is to provide a sealing device for a desktop board blow molding device, which uses automatic sealing equipment to replace manual sealing, thereby improving work efficiency and sealing quality.

The technical solution of the present invention is: a sealing device of a desktop board blow molding device, comprising a blow molding mouth, a blow mold clamping machine and a blow mold fixed inside the blow molding mold clamping machine, the blow molding mouth is provided with Oval-shaped discharge port, the raw material is extruded from the discharge port in the shape of a ring-shaped curtain, and the bottom sealing splint that automatically seals the bottom of the ring-shaped raw material is installed under the blow mold.

Preferably, the bottom sealing splint includes two lower splints, the two lower splints are respectively hinged on the ground or the base of the blow molding machine, and the two lower splints seal the raw materials when they swing towards each other and merge.

Preferably, the front and rear ends of the lower splint are fixed with connecting rods, the other end of the connecting rod is connected with a rotating gear, and a rack for lifting and sliding up and down is meshed between the two rotating gears.

Preferably, the inner surface of one of the two lower splints is provided with more than two projections at intervals, and the inner surface of the other lower splint is a plane.

After adopting this technical scheme, when the raw material descends in the form of a ring-shaped curtain, the bottom of the raw material is first sealed by the bottom sealing splint, which can quickly form a semi-closed state of the raw material, which is in the shape of a bottom-sealed pocket, allowing the top blow molding mouth The blown air fills the pocket-shaped inner cavity, thereby avoiding the sticking of the raw material belt due to wrinkles and other problems, and using automatic sealing instead of manual sealing, the efficiency is greatly improved, and the sealing quality is high.

Description of drawings

Accompanying drawing 1 is the three-dimensional schematic diagram of whole blow molding equipment;

Accompanying drawing 2 is the schematic front view of the whole blow molding equipment;

Accompanying drawing 3 is the bottom schematic diagram of blow molding mouth;

Accompanying drawing 4 is the schematic diagram of blow mold;

Accompanying drawing 5 is the schematic diagram of bottom sealing splint;

Accompanying drawing 6 is the schematic diagram of top sealing splint.

Detailed ways

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

As shown in Figures 1 to 6, a sealing device for a desktop board blow molding device includes a blow molding port 1, a blow mold clamping machine 2 and a blow mold 3 fixed inside the blow molding mold clamping machine, the described The blow molding mold comprises a left half-mold 31 and a right half-mold 32, and the blow molding mouth is provided with an oval discharge port 11, and the raw material 10 is extruded in a circular curtain shape from the discharge port, and the raw material after extrusion Corresponding to the oval ring-shaped curtain, the left half or right half of the mold includes a core plate 33, the inner side of the core plate is the surface matching the finished desktop, and more than two independent fixing plates are provided outside the core plate 34. When fixing, directly use the pressure plate to fix the fixed plate on the blow molding machine. A support column 35 is fixed between each fixed plate and the mold core plate, and the support column strengthens the firmness. In this plan, there are 4 fixed plates , there are 7 supporting columns on each fixed plate, top sealing splint 4 that automatically seals the top of the raw material is provided above the blow mold, and bottom sealing splint that automatically seals the bottom of the ring-shaped raw material is provided below the blow molding mold 5. After adopting this technical solution, firstly, the blow molding port is improved, and the traditional circular discharge port is modified. The general circular discharge port is designed for circular products, but for this project Medium-plate products are not suitable. When the circular extruded curtain-shaped raw materials are extruded into a plate shape, the waste of raw materials is very serious. Therefore, in this plan, the circular discharge port in the traditional blow molding port is changed to an oval shape. , the elliptical raw material itself is flatter than the circular one, which can greatly reduce the waste of raw materials when it is squeezed. Secondly, two sealing devices are added in this plan, which are the top sealing splint and the bottom sealing splint. When the raw material is in the shape of When descending like a curtain, the bottom of the raw material is first sealed by the bottom sealing splint, which can quickly form a semi-closed state of the raw material, allowing the air blown from the top blow molding port to fill the inner cavity of the raw material, while the top sealing splint is mainly used to prevent The product sticks to the mold. When the blow mold is combined, the top sealing splint also clamps the raw material at the same time, so that even when the blow mold is separated, the formed panel will stay under the top sealing splint, which is convenient for the operator to take. The blow molding mold has also been improved, adopting a lightweight blow molding mold, and replacing the entire mold steel with a structure of 4 independent fixing plates, which greatly reduces the weight of the mold itself without affecting the precision of the core surface.

As shown in Figure 3, the blow molding port in this solution includes an outer frame 12 and an inner core 13, and the discharge port is located between the outer frame and the inner core, and the outer frame is still round in order to facilitate processing. The main improvement is to change the outline of the inner core into an ellipse. The center of the inner core is provided with a main air outlet 131, and more than 4 secondary air outlets 132 are arranged around the main air outlet. The diameter of the main air outlet is larger, and the secondary air outlet The caliber of the mouth is relatively small, and it mainly blows to the side wall of the raw material. As a preference, the main blowing port is tapered, and the design of the tapered port allows the wind direction to blow to both sides in a diffuse manner. The secondary blowing port The orientation is obliquely downward, which guides the downward trend of the raw materials, and also plays the role of separating the raw materials with the air flow to prevent sticking.

As shown in Figure 4, the side wall of the left half mold is provided with a mold clamping positioning groove 311, and the right half mold side wall is provided with a mold clamping positioning block 321 matched with the mold clamping positioning groove, and the mold clamping positioning groove and the clamping mold The shape of the positioning block is trapezoidal. When the mold is closed, the clamping positioning block is inserted into the positioning groove of the clamping mold to increase the positioning accuracy of the mold clamping. In addition, there is a clamping plate 36 between the left and right half molds. When the mold is removed For temporary storage, the left and right half molds can be sealed and fixed by the clamping plate to prevent the surface of the mold core from being corroded or damaged by external forces.

As shown in Figure 5, it is the mechanism of the bottom sealing splint in this scheme, and the bottom sealing splint includes two lower splints 51, and the two lower splints are respectively hinged on the ground or on the base of the blow molding machine. In the example, the lower splint is hinged on the base of the blow molding machine. There is a hinged plate on the base, and the two lower splints are respectively hinged on the hinged plate. Seal it to make it a pocket-shaped raw material bag with the bottom sealed and the top not sealed, so that the air blown from above can fill the raw material bag to prevent the raw materials from sticking to each other. As a preference, the driving mechanism of the two lower splints It is a rack and pinion structure, that is, the front and rear ends of the lower splint are fixed with a connecting rod 52, the other end of the connecting rod is connected with a rotating gear 53, and a rack 54 for lifting up and down sliding is engaged in the middle of the two rotating gears. It is a steel bar with serrated surfaces on both sides. The serrated surfaces on both sides are respectively meshed with the rotating gears on the corresponding sides. When the rack slides up and down, the rotation direction of the two rotating gears is opposite. Sliding simultaneously drives two rotating gears to rotate. When the rotating gear rotates, it drives the connecting rod to rotate, and finally drives the two lower splints to swing toward each other or to swing apart; The bump 511 above the first block, the inner surface of the other lower splint is a plane, when the two lower splints are merged, the bump fits with the plane inside the other splint, and there is a gap in the area where the bump is not set, the design of this The advantage of the structure is that when the left and right half molds are combined and extruded, the air in the raw material bag will be squeezed rapidly. If the bottom is completely sealed, all the air will be squeezed to the top of the raw material bag for discharge, and all the air will be discharged. Concentrating on the top of the semi-finished product will easily lead to uneven wall thickness at the top of the semi-finished product. However, if there is a gap when the lower plywood is set up when merging, part of the air can be discharged from the gap to the bottom, and a part of the air discharged from the top will be shared. The wall thickness of each part of the semi-finished product is uniform, which improves the product quality.

As shown in Figure 6, the top sealing splint includes two upper splints 41, the upper splint is arranged on the upper bracket 42, and the upper bracket is provided with a hydraulic cylinder that drives the upper splint to translate to the middle or both sides. Driven by the cylinder, the upper splint moves in translation relative to the upper bracket. When the left and right half molds are combined to extrude raw materials, the two upper splints move towards the middle, and finally clamp the raw materials above the extruded semi-finished products. At this time, the semi-finished product and the raw material are still connected. When the left and right half molds are separated, the semi-finished product will stay in the middle together with the clamped raw materials, and will not stick to the mold and the right half mold. When two pieces When the upper splint is separated, the operator can take off the semi-finished product smoothly. As a preference, in order to facilitate the operator to take materials, the top of the upper bracket is provided with a tooth surface, and the tooth surface is meshed with driving teeth 43, and the bottom of the upper bracket slides on a slide. In the rail 44, when the driving teeth rotate, the entire upper bracket is driven to move forward or backward, and the upper clamping plate at this time also moves with the upper bracket as a whole. If there is a semi-finished product on the upper clamping plate, the semi-finished product can be moved forward or Backward movement, when the semi-finished product is moved out of the blow mold, the operator can easily take the semi-finished product, without allowing the operator to enter the blow mold to take the semi-finished product, which improves the work efficiency and ensures the personal safety of the operator After all, it is very dangerous for the body to directly enter the mold; in addition, in order to facilitate the operator to tear off the semi-finished product from the raw material, this plan directly uses the upper splint to cut the raw material and the semi-finished product after extrusion, that is, the two upper splints One of them has a cutting edge 412 on the top of the inner surface. When the two upper splints are combined, the cutting edge will automatically cut off the raw material above the upper splint and the raw material at the clamped position of the upper splint, eliminating the need for manual tearing. Simultaneously after cutting, in order to prevent the semi-finished product from slipping off the upper splint, the cutting edge is provided with more than 2 anti-skid blocks 411 below, increasing the number of anti-skid blocks can increase the coefficient of friction between the upper splint and the raw material.

The above is only an illustration of the preferred examples of the present invention, but should not be construed as a limitation on the claims. The present invention is not only limited to the above examples, its specific structure allows changes, and those skilled in the art can make various changes and deformations according to the present invention, as long as they do not depart from the spirit of the present invention, all should belong to the definition of the appended claims of the present invention scope.

Claims (1)

1. A sealing device of a desktop board blow molding device, comprising a blow molding mouth (1), a blow mold clamping machine (2) and a blow mold (3) fixed inside the blow molding mold clamping machine, characterized in that: The blow molding port is provided with an elliptical discharge port (11), and the raw material (10) is extruded from the discharge port in the shape of a ring-shaped curtain, and the bottom of the blow molding mold is provided with an automatic sealing ring-shaped bottom of the raw material. The bottom sealing splint (5), the bottom sealing splint includes two lower splints (51), the two lower splints are respectively hinged on the ground or the base of the blow molding machine, and when the two lower splints swing towards each other, they will raw material sealing, one of the two lower splints is provided with two or more bumps (511) at intervals on the inner surface, the inner surface of the other lower splint is flat, and the front and rear ends of the lower splints are fixed with connecting rods (52), the other end of the connecting rod is connected with a rotating gear (53), and a tooth bar (54) that lifts and slides up and down is meshed in the middle of the two rotating gears.