CN2204232Y

CN2204232Y - Plastics-forming machine

Info

Publication number: CN2204232Y
Application number: CN 94223731
Authority: CN
Inventors: 马立群; 林经勇
Original assignee: Local State Owned Shantou Machinery Works
Current assignee: Local State Owned Shantou Machinery Works
Priority date: 1994-10-17
Filing date: 1994-10-17
Publication date: 1995-08-02
Anticipated expiration: 2004-10-17

Abstract

The utility model relates to a plastics-forming machine, which is composed of a machine body (9), a heater, a clamping mechanism, a mould mechanism, a cylinder, a gas path device, a feeding mechanism, an electric control part, and a power source, wherein, the mould mechanism comprises a mould (8) and a cylinder (12). The utility model is characterized in that the clamping mechanism adopts a clamping frame with a closed outline of a clamping interface and is composed of an upper part and a lower part; an upper clamping frame is composed of a connecting board (3), a frame (5), and a compression spring (4). The frame (5) is connected with the connecting board (3). The compression spring (4) is arranged between the frame (5) and the connecting board (3). The upper clamping frame is composed of connecting with the connecting board (3) and an upper cylinder (1). A lower clamping frame (7) which is corresponding to the upper clamping frame is fixed on a machine body under the upper clamping frame, and is positioned on the same working position with the mould (8). The heater is installed on the connecting board (3) of the clamping frame.

Description

Plastics-forming machine

The utility model relates to a kind of plastic molding press, particularly relates to a kind of make-up machine that is applicable to polystyrene (hereinafter referred BOPS) sheet material.

In the prior art, domestic plastic sheet make-up machine all adopts moulding process as shown in Figure 1, be that plastic sheet is by sending the sheet chain to do the both sides clamping, send in the heater earlier and heat, enter mould molding again, its weak point is that this make-up machine only is applicable to normally used plastic sheet, as the processing and forming of PVP plastic sheet, but is not suitable for the processing and forming of BOPS sheet material.The BOPS sheet material be in the world today just at booming a kind of new packaging material, its many performances are better than the general plastic sheet of present China, are the grade packaged materials of environmental protection of generally acknowledging in the world, it will be the replacement product of PVC slide.But, the moulding of BOPS sheet material has the characteristic different with other general-purpose plastics sheet material, and it is a kind of biaxial tension sheet material, thereby, after being heated, it can produce the phenomenon of two-way contraction, for this reason, it must carry out reliable clamping to its periphery when moulding is heated, in addition, its heat accumulation is relatively poor, will cool off rapidly in case leave thermal source, so it is strict especially to the temperature and the uniformity requirement thereof of moulding, it is fast that shaping speed is wanted.Adopt prior art, (1) only carries out clamping to dual-side of BOPS sheet material, can cause BOPS sheet material heating back unidirectional shrinkage phenomenon to occur like this and can't moulding; (2) heater of the prior art adopts the mode of heating of the heat radiation type of two heaters up and down, is difficult to guarantee the forming temperature and the uniformity thereof of BOPS sheet material, and the quality of moulding is seriously influenced; (3) heating is to separate on two different stations to finish with moulding in the prior art, and this makes the shaping speed of BOPS sheet material and temperature be subjected to harmful effect in the sheet material transport process, causes molding effect not good enough.

The purpose of this utility model is exactly in order to overcome weak point of the prior art, provide a kind of simple and compact for structure, be applicable to a kind of plastic molding press BOPS sheet forming, that can guarantee Forming Quality.

The purpose of this utility model can realize by following technical measures: it is by body, heater, clamping device, mold mechanism, cylinder, gas path device, feed mechanism, electric control system and power source are formed, wherein, mold mechanism comprises mould and cylinder, it is characterized in that clamping device adopts the clamping contact-making surface to have the holding frame of closed contour, it comprises, following two parts, last holding frame is by connecting plate, framework becomes with compression spring set, framework and connecting plate link, the compression spring then is loaded between them, and last holding frame is connected with casing top half by connecting plate; Following holding frame then is fixed on the body of its below corresponding to last holding frame, and is positioned at same station with mould; Heater then is installed on the connecting plate of holding frame.Like this, the utility model is actually the moulding process of BOPS sheet material three operations of clamping hot briquetting in the prior art is integrated, carry out at same station, both can guarantee not occur when the BOPS sheet material is heated the cissing phenomenon, can reach perfect effect by rapid shaping again.

During work, the BOPS sheet material is sent into clamping hot briquetting station by feed mechanism, casing top half drives upward, and holding frame moves downward, periphery by compression spring handle BOPS sheet material is clamped in up and down in the holding frame reliably, simultaneously, heater heats sheet material, descend cylinder to carry out matched moulds then, when sheet material reaches forming temperature, apply certain draught head apace at the sheet material upper and lower surface, be subjected to thermal softening the BOPS sheet material promptly be pressed into and be adjacent to die cavity, just become the goods of the shape that formalizes through hardening by cooling.

Heater of the present utility model can also adopt the heated at constant temperature plate, directly contacts heating with the BOPS sheet material, thereby, guarantee the forming temperature and the uniformity thereof of sheet material better.

The utility model compared with prior art has following advantage: (1) is owing to be the design of carrying out at the characteristic of BOPS sheet material, carry out the Trinitarian moulding process of clamping hot briquetting, be specially adapted to the processing and forming of BOPS sheet material, in fact, it also can carry out processing and forming to the general-purpose plastics sheet material; (2) adopt periphery to clamp, clamping is reliable, can avoid both sides in the prior art to clamp making the BOPS sheet material unidirectional contraction occur and phenomenon that can't moulding; (3) as adopting the heating plate Direct Contact Heating, the heating-up temperature of plastic sheet is controlled easily, and temperature homogeneity is good; (4) because of it has homogeneous heating, the characteristics of rapid shaping make its Forming Quality good, and stable; (5) adopt the Trinitarian molding mode of clamping hot briquetting, can also reduce energy consumption; (6) simple in structure, compact practical, cost of investment is low.

Below in conjunction with accompanying drawing the utility model is described in further detail:

Fig. 1 is the schematic diagram of plastic sheet moulding process in the prior art;

Fig. 2 is the structural representation front view of a kind of embodiment of the utility model;

Fig. 3 is the diagrammatic side views of Fig. 2;

Fig. 4 is the Trinitarian partial structurtes schematic diagram of a kind of embodiment clamping of the utility model hot briquetting.

A kind of plastic molding press shown in Fig. 2～4 is one of embodiment of the present utility model, it is made up of body 9, heater, clamping device, mold mechanism, cylinder, gas path device, feed mechanism, electric control system and power source, wherein, heater adopts heated at constant temperature plate 6, it directly contacts heating with the BOPS sheet material, thereby, guarantee the forming temperature and the uniformity thereof of sheet material better; Clamping device adopts the clamping contact-making surface to have the holding frame of closed rectangular profile, it comprises upper and lower two parts, last holding frame is made up of connecting plate 3, framework 5 and compression spring 4, framework 5 links with connecting plate 3,4 on spring of compression is loaded between them, and connecting plate is connected with casing top half 1 again; 7 of following holding frames are fixed in corresponding to last holding frame on the body 9 of its below, and are positioned at same station with mould 8; Heated at constant temperature plate 6 is installed on the connecting plate 3 of holding frame, and mold mechanism comprises mould 8 and following cylinder 12, and guide rod 2 all is housed on last holding frame and the mould, to guarantee the cylinder proper motion; In addition, cylinder provides power by vavuum pump 14 and

vacuum tank

13, and 10 is BOPS package sheet material.The workflow of this machine is: material loading → clamping and heating → matched moulds → moulding → pine are pressed from both sides → blow off → blanking, complete machine except that loading and unloading because the manually-operated, all the other each function actions are automation and control.It realizes that with the moulding process of BOPS sheet material three operations of clamping hot briquetting are integrated, and has rapid shaping, and steady quality is operated characteristics simple and easy and easy to maintenance.

Claims

1, a kind of plastic molding press, it is by body (9), heater, clamping device, mold mechanism, cylinder, gas path device, feed mechanism, electric control system and power source are formed, wherein, mold mechanism comprises mould (8) and cylinder (12), it is characterized in that clamping device adopts the clamping contact-making surface to have the holding frame of closed contour, it comprises, following two parts, last holding frame is by connecting plate (3), framework (5) and compression spring (4) are formed, framework (5) links with connecting plate (3), compression spring (4) then is loaded between them, and last holding frame is connected with casing top half (1) by connecting plate (3); Following holding frame (7) then corresponding to last holding frame be fixed in its below body on, and and mould (8) be positioned at same station; Heater is installed on the connecting plate (3) of holding frame.

2, plastic molding press according to claim 1 is characterized in that described heater adopts heated at constant temperature plate (6), directly contacts heating with plastic sheet.