阅读说明：本技术 一种中空吹塑机 (Hollow blow molding machine ) 是由 王永泉 陈永强 王进军 于 2020-07-02 设计创作，主要内容包括：本申请涉及一种中空吹塑机,包括机架、用于挤出塑料原料的挤出机构、用于产品成型的合模机构、用于向合模机构吹气的充气机构和用于将塑料原料从挤出机构上切下的切割机构,所述切割机构位于挤出机构下方；所述机架底部设有底座,所述合模机构滑动设置在底座上,所述合模机构包括两个承载块和用于驱动两个承载块相互远离或靠近的夹持驱动组件,两个所述承载块呈相向设置的一端均开设有安装槽,两个所述安装槽内均可拆卸连接有吹塑模具,所述吹塑模具的端面和承载块的端面位于同一水平面内,两个所述吹塑模具在两个承载块抵接时同样抵接并形成用于吹塑产品的成型腔。本申请具有提升模具更换的便捷性的效果。(The application relates to a hollow blow molding machine, which comprises a rack, an extrusion mechanism for extruding plastic raw materials, a mold clamping mechanism for product molding, an inflation mechanism for blowing air to the mold clamping mechanism, and a cutting mechanism for cutting the plastic raw materials off from the extrusion mechanism, wherein the cutting mechanism is positioned below the extrusion mechanism; the frame bottom is equipped with the base, locking mechanism slides and sets up on the base, locking mechanism includes two carrier blocks and is used for driving two carrier blocks and keeps away from each other or the centre gripping drive assembly that is close to, two the carrier block is the one end that sets up in opposite directions and has all seted up the mounting groove, two all can dismantle in the mounting groove and be connected with the blow mold, the terminal surface of blow mold and the terminal surface of carrier block are located same horizontal plane, two the same butt of blow mold when two carrier blocks butt forms the shaping chamber that is used for the blowing product. This application has the effect that promotes the convenience that the mould was changed.)

1. A blow molding machine characterized by: the plastic material extruding machine comprises a rack (1), an extruding mechanism (11) for extruding plastic materials, a die assembly mechanism (2) for product molding, an inflating mechanism (12) for blowing air to the die assembly mechanism (2) and a cutting mechanism (13) for cutting the plastic materials from the extruding mechanism (11), wherein the cutting mechanism (13) is positioned below the extruding mechanism (11); frame (1) bottom is equipped with base (14), locking mechanism (2) slide and set up on base (14), locking mechanism (2) include two bearing blocks (22) and be used for driving centre gripping drive assembly (24) that two bearing blocks (22) kept away from each other or are close to, two mounting groove (21) have all been seted up to bearing block (22) the one end that sets up in opposite directions, two all can dismantle in mounting groove (21) and be connected with blow mold (26), the terminal surface of blow mold (26) and the terminal surface of bearing block (22) are located same horizontal plane, two same butt of blow mold (26) when two bearing blocks (22) butt and form into shape chamber (263) that are used for the blow-molding product.

2. An air blowing machine according to claim 1, characterized in that: electromagnets (23) are respectively arranged on calipers at the bottoms of the mounting grooves (21), and the functional surfaces of the electromagnets (23) are abutted against a blow molding die (26); two the equal threaded connection of one end that carrier block (22) are back of the body and set up has a plurality of fixing bolt (221), and is a plurality of the tip and the blow molding mould (26) threaded connection of fixing bolt (221) and not communicate with one-tenth die cavity (263), two blow molding mould (26) all adopt magnetic metal to make.

3. An air blowing machine according to claim 2, characterized in that: two holding tank (211) have been seted up to the tank bottom of mounting groove (21), the intussuseption of holding tank (211) is provided with fixed block (212), electro-magnet (23) inlay card sets up on electro-magnet (23), the one end of keeping away from mounting groove (21) on carrier block (22) is equipped with drawing of patterns cylinder (223), the piston rod of drawing of patterns cylinder (223) runs through carrier block (22) and fixed block (212) and keeps away from the one end fixed connection of blow mold (26).

4. An air blowing machine according to claim 3, characterized in that: the one end that fixed block (212) are close to blow mold (26) is higher than the tank bottom of mounting groove (21), the one end that blow mold (26) and mounting groove (21) tank bottom butt is equipped with and is used for holding groove (262) of meal fixed block (212).

5. An air blowing machine according to claim 1, characterized in that: all be equipped with a plurality of guide blocks (261) along its thickness direction on the lateral wall of blow mold (26), seted up on the cell wall of mounting groove (21) with guide block (261) sliding fit's guide way (213).

6. An air blowing machine according to claim 1, characterized in that: and a rodless cylinder (25) is arranged on the base (14) along the length direction of the base, and the cylinder body of the rodless cylinder (25) is connected with the die clamping mechanism (2).

7. An air blowing machine according to claim 6, characterized in that: two connecting plates (222) extend out of the bottoms of the bearing blocks (22) along the vertical direction, the clamping driving mechanism (24) comprises a double-head cylinder, the double-head cylinder is located between the two connecting plates (222), the end parts of two piston rods of the double-head cylinder are respectively connected with the two connecting plates (222), and a cylinder body of the double-head cylinder is fixedly connected with a cylinder body of the rodless cylinder (25).

8. An air blowing machine according to claim 1, characterized in that: two the one end of loading board all is connected with grip block (27) along the horizontal direction, two grip block (27) are the one end of butt and are equipped with centre gripping breach (271) that are used for centre gripping product, one of them grip block (27) are kept away from the one end of centre gripping breach (271) and are equipped with riser (272) along vertical direction, the one end that centre gripping breach (271) was kept away from in riser (272) is equipped with cutting cylinder (273), the piston rod of cutting cylinder (273) runs through riser (272) and is connected with edulcoration blade (274) that are used for cutting the unnecessary material of product, edulcoration blade (274) bottom and grip block (27) bottom butt.

9. An air blowing machine according to claim 8, characterized in that: the impurity removing blade (274) comprises a knife board (275) and two blade pieces (276), the cross sections of the blade pieces (276) are right-angled triangles and are located on two sides of the bottom of the knife board (275), the knife board (275) is connected with a piston rod of a cutting cylinder (273), and the two blade pieces (276) and the knife board (275) are integrally formed.

10. An air blowing machine according to claim 1, characterized in that: the inflation mechanism (12) and the die assembly mechanism (2) are respectively provided with two sets, and the inflation mechanism (12) and the die assembly mechanism (2) are respectively positioned on two sides of the extrusion mechanism (11).

Technical Field

The application relates to the field of blow molding equipment, in particular to a hollow blow molding machine.

Background

The plastic bottle production is usually completed by a blow molding machine, the molten plastic is extruded and then blow molded in a mold, the outline of the plastic product is the outline of a molding groove of the mold, and after a plastic product primary blank formed by blow molding is cooled, redundant materials are cut off to obtain a standard plastic product.

Chinese patent publication No. CN109501208A discloses a blow molding machine, which comprises a frame, an extruder, a mold clamping mechanism for product molding, an inflation mechanism, a cutting mechanism, and a trimming assembly, wherein the mold clamping mechanism comprises a base, a first movable mold and a second movable mold sliding relative to the base, a double-headed cylinder, and a driving cylinder, and the first movable mold and the second movable mold are butted to form a cavity and a clamping cavity; a sliding chute extending horizontally is formed in the first movable die relative to the bottle mouth of the bottle, a notch knife is arranged in the sliding chute in a sliding mode, the notch knife and the sliding chute slide in a sealing mode, and a sliding cylinder for pushing the notch knife to move horizontally is fixed on the first movable die; the mouth trimming mechanism comprises a first mouth trimming cylinder, a second mouth trimming cylinder, a mounting seat, a vertical setting and a rotating shaft connected to the mounting seat in a rotating mode, a driving assembly for driving the rotating shaft to rotate, a connecting plate fixed on the rotating shaft, a fixed shaft fixed on the connecting plate, a circular knife fixed at the bottom of the fixed shaft and an arc limiting plate fixed with the circular knife, wherein an arc groove is formed in the outer side surface of the arc limiting plate, and the circular knife is inserted into the arc groove to intercept redundant materials at the bottle mouth of a bottle to be output.

The surface of first movable mould and second movable mould butt joint fluting makes first movable mould and second movable mould butt joint form the die cavity and press from both sides tight chamber, and first movable mould and second movable mould and driver part fixed connection slide the blowing formation of accomplishing the bottle through the relative base of driver part, but with mould and driver part direct fixed connection, it is comparatively inconvenient when the mould is changed to needs.

Disclosure of Invention

In order to improve the problem that the mould is changed comparatively inconvenient, this application provides a hollow blow molding machine.

The application provides a blow molding machine adopts following technical scheme:

a hollow blow molding machine comprises a frame, an extrusion mechanism for extruding plastic raw materials, a mold clamping mechanism for product molding, an inflation mechanism for blowing air to the mold clamping mechanism, and a cutting mechanism for cutting the plastic raw materials off the extrusion mechanism, wherein the cutting mechanism is positioned below the extrusion mechanism; the frame bottom is equipped with the base, locking mechanism slides and sets up on the base, locking mechanism includes two carrier blocks and is used for driving two carrier blocks and keeps away from each other or the centre gripping drive assembly that is close to, two the carrier block is the one end that sets up in opposite directions and has all seted up the mounting groove, two all can dismantle in the mounting groove and be connected with the blow mold, the terminal surface of blow mold and the terminal surface of carrier block are located same horizontal plane, two the same butt of blow mold when two carrier blocks butt forms the shaping chamber that is used for the blowing product.

Through adopting above-mentioned technical scheme, only need take off blow molding die dismantlement from the supporting shoe when the mould needs to be changed and can change blow molding die, reach the effect that promotes the convenience that the mould was changed for a blowing machine can be used to produce the product of different shapes.

Preferably, the bottom of the mounting groove is provided with a clamp with an electromagnet, and the functional surface of the electromagnet is abutted against the blow molding die; two the carrier block is the equal threaded connection of one end of carrying on the back mutually and sets up has a plurality of fixing bolt, and is a plurality of fixing bolt's tip and blow mold threaded connection and not communicate with the shaping chamber, two blow mold all adopts magnetic metal to make.

Through adopting above-mentioned technical scheme, only need screw off fixing bolt when needing to be changed blow mold to close the electro-magnet and can take out blow mold from the mounting groove, the change of the mould of being convenient for.

Preferably, two the holding tank has been seted up to the tank bottom of mounting groove, the holding tank intussuseption is provided with the fixed block, the electro-magnet inlay card sets up on the electro-magnet, the one end of keeping away from the mounting groove on the carrier block is equipped with drawing of patterns cylinder, the piston rod of drawing of patterns cylinder runs through the one end fixed connection that blowing mould was kept away from to carrier block and fixed block.

Through adopting above-mentioned technical scheme, when needing to be changed blow mold, it is ejecting with blow mold through drawing of patterns cylinder control fixed block, and blow mold can not drop under the absorption of electro-magnet simultaneously, then closes the electro-magnet, and blow mold breaks away from with the electro-magnet, has further promoted the convenience that blow mold changed.

Preferably, the one end that the fixed block is close to blow mold is higher than the tank bottom of mounting groove, blow mold is equipped with the groove that holds that is used for containing the meal fixed block with the one end of mounting groove tank bottom butt.

Through adopting above-mentioned technical scheme, through holding setting up of groove convenient when installing new blow mold with blow mold and mounting groove alignment, be about for the fixing clip inlay hold the groove can with blow mold and mounting groove alignment and drive fixed block and blow mold installation through drawing of patterns cylinder in the mounting groove, spin up fixing bolt again and can accomplish blow mold's change, promote the convenience and the accuracy that blow mold changed.

Preferably, a plurality of guide blocks are arranged on the side wall of the blow molding mold along the thickness direction of the side wall, and guide grooves in sliding fit with the guide blocks are formed in the groove walls of the mounting grooves.

Through adopting above-mentioned technical scheme, the cooperation of guide block and guide way makes the installation of blowing mould and mounting groove more smoothly accurate stable with the dismantlement.

Preferably, a rodless cylinder is arranged on the base along the length direction of the base, and a cylinder body of the rodless cylinder is connected with the die clamping mechanism.

Through adopting above-mentioned technical scheme, drive locking mechanism through no pole cylinder and accomplish the blowing process for locking mechanism is gliding more stable and smooth and easy on the base.

Preferably, two the bottom of carrier block all extends the connecting plate along vertical direction, centre gripping actuating mechanism includes double-end cylinder, double-end cylinder is located between two connecting plates and two piston rod tip of double-end cylinder are connected with two connecting plates respectively, double-end cylinder's cylinder body and rodless cylinder's cylinder body fixed connection.

Through adopting above-mentioned technical scheme, through the centre gripping of two carrier blocks of double-end cylinder control with part, be convenient for promote the stability of blowing process to the control of carrier block, make two carrier blocks can stabilize the centre gripping to the blow molding mould when carrying out the blow molding simultaneously for two blow molding mould align and inseparable butt, promote the leakproofness in shaping chamber.

Preferably, two the one end of loading board all is connected with the grip block along the horizontal direction, two the one end that the grip block is the butt is equipped with the centre gripping breach that is used for the centre gripping product, one of them the grip block is kept away from the one end of centre gripping breach and is equipped with the riser along vertical direction, the one end that the centre gripping breach was kept away from to the riser is equipped with the cutting cylinder, the piston rod of cutting cylinder runs through the riser and is connected with the edulcoration blade that is used for cutting the unnecessary material of product, edulcoration blade bottom and grip block bottom butt.

Through adopting above-mentioned technical scheme, the unnecessary material of bottleneck department of the product of blowing mold output can be got rid of in the setting of grip block and edulcoration blade, promotes product quality.

Preferably, the impurity removing blade comprises a knife board and two blade blades, the cross sections of the blade blades are right-angled triangles and the two blade blades are located on two sides of the bottom of the knife board, the knife board is connected with a piston rod of the cutting cylinder, and the two blade blades and the knife board are integrally formed.

Through adopting above-mentioned technical scheme, be equipped with two sword blades on the edulcoration blade, after the blowing product centre gripping of grip block with the output is fixed, cutting cylinder control edulcoration blade releases the miscellaneous material excision to product bottleneck department, and the while cutting cylinder is when replying the edulcoration blade, and another sword blade of edulcoration blade carries out the secondary cutting to the bottleneck of product, further promotes the roughness of product bottleneck, promotes the quality of product.

Preferably, the inflation mechanism and the die assembly mechanism are respectively provided with two groups, and the two groups of inflation mechanism and the two groups of die assembly mechanism are respectively positioned at two sides of the extrusion mechanism.

Through adopting above-mentioned technical scheme, two sets of mechanisms and locking mechanism nature blown film process of going on simultaneously, further promote the production efficiency of product.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the mold needs to be replaced, the blow molding mold can be replaced only by detaching the blow molding mold from the supporting block, so that the effect of improving the convenience of mold replacement is achieved, and the blow molding machine can be used for producing products in different shapes;

2. when the blow mold needs to be replaced, the fixed block is controlled by the demolding cylinder to eject out the blow mold, meanwhile, the blow mold cannot fall off under the adsorption of the electromagnet, then the electromagnet is closed, the blow mold is separated from the electromagnet, and the convenience of replacing the blow mold is further improved;

3. be equipped with two sword blades on the edulcoration blade, after the blowing product centre gripping of grip block with the output is fixed, cutting cylinder control edulcoration blade is released and is amputated the miscellaneous material of product bottleneck department, and the cutting cylinder is when replying the edulcoration blade simultaneously, and another sword blade of edulcoration blade carries out the secondary cutting to the bottleneck of product, further promotes the roughness of product bottleneck, promotes the quality of product.

Drawings

Fig. 1 is a schematic view of the overall structure of an air blowing machine in an embodiment of the present application;

FIG. 2 is a schematic structural view of a mold clamping mechanism in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a bearing block and a connecting plate in an embodiment of the present application;

FIG. 4 is a schematic view of another angular structure of the bearing block and the connecting plate in the embodiment of the present application;

fig. 5 is a schematic view of another angle of the blow molding machine according to the embodiment of the present application.

Description of reference numerals: 1. a frame; 11. an extrusion mechanism; 12. an inflation mechanism; 121. a lifting cylinder; 122. an inflation tube; 13. a cutting mechanism; 131. propelling the cylinder; 132. cutting off the blade; 14. a base; 141. an auxiliary lever; 2. a mold clamping mechanism; 21. mounting grooves; 211. accommodating grooves; 212. a fixed block; 213. a guide groove; 22. a bearing block; 221. fixing the bolt; 222. a connecting plate; 223. a demoulding cylinder; 23. an electromagnet; 24. a clamping drive assembly; 241. a stabilizer bar; 25. a rodless cylinder; 26. a blow mold; 261. a guide block; 262. a containing groove; 263. a molding cavity; 27. a clamping plate; 271. clamping the notch; 272. a vertical plate; 273. cutting the air cylinder; 274. removing impurities by a blade; 275. a cutting board; 276. a blade.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a blow molding machine. Referring to fig. 1, a blow molding machine includes a frame 1, an extrusion mechanism 11 for extruding a plastic raw material, a mold clamping mechanism 2 for molding a product, an inflation mechanism 12 for blowing air to the mold clamping mechanism 2, and a cutting mechanism 13 for cutting the plastic raw material from the extrusion mechanism 11. Cutting mechanism 13 is located extrusion mechanism 11 below, and locking mechanism 2 and inflation mechanism 12 all are equipped with two sets ofly, and two inflation mechanisms 12 are located extrusion mechanism 11's both sides, have further promoted two locking mechanisms 2 and two inflation mechanisms 12 one-to-one, and locking mechanism 2 is located extrusion mechanism 11 below. The bottom of the frame 1 is provided with a base 14, the die clamping mechanism 2 is arranged on the base 14 in a sliding manner along the width direction of the frame 1, a plastic raw material is extruded out through the extrusion structure after being processed, the die clamping mechanism 2 slides on the base 14 to the position below the extrusion mechanism 11 to clamp the plastic extruded by the extrusion mechanism 11, then the plastic and the extrusion mechanism 11 are cut off through the cutting mechanism 13, and the die clamping mechanism 2 slides to the position below the inflation mechanism 12 to be subjected to blow molding setting.

Referring to fig. 1, the cutting mechanism 13 protects the propulsion cylinder 131 and the cutoff blade 132, the propulsion cylinder 131 is fixedly connected with the frame 1, the cutoff blade 132 is transversely arranged, and a piston rod of the propulsion cylinder 131 is connected with the cutoff blade 132. When the clamping mechanism 2 grips the plastic extruded from the extrusion mechanism 11 by sliding below the extrusion mechanism 11, the propulsion cylinder 131 propels the cutoff blade 132 to cut the plastic between the extrusion mechanism 11 and the clamping mechanism 2. The inflating mechanism 12 comprises a plurality of lifting cylinders 121 arranged along the vertical direction, the lifting cylinders 121 are fixedly connected with the rack 1, piston rods of the lifting cylinders 121 are connected with inflating tubes 122, and the inflating tubes 122 are connected with an air source. The clamping mechanism 2 clamps the plastic below the inflating mechanism 12, and the lifting cylinder 121 lowers the inflating tube 122 and inserts the inflating tube into the clamping mechanism 2 to perform blow molding on the plastic.

Referring to fig. 3 and 4, the clamping mechanism 2 includes two carrier blocks 22 and a clamp driving assembly 24 for driving the two carrier blocks 22 away from or close to each other. Two carrier blocks 22 are all seted up mounting groove 21 for the one end that sets up in opposite directions, all can dismantle in two mounting grooves 21 and be connected with blow mold 26. The side walls of the blow mold 26 are provided with a plurality of guide blocks 261 along the thickness direction, and the wall of the mounting groove 21 is provided with a guide groove 213 in sliding fit with the guide blocks 261. The end face of the blow mold 26 and the end face of the carrier block 22 are located in the same horizontal plane, and the two blow molds 26 likewise abut when the two carrier blocks 22 abut and form a molding cavity 263 for a blow molded product. When the mold needs to be replaced, the blow molding mold 26 can be replaced by detaching and taking down the blow molding mold 26 from the supporting block, so that the effect of improving the convenience of mold replacement is achieved, and the blow molding machine can be used for producing bottle products in different shapes.

Referring to fig. 2 and 3, the holding groove 211 has been seted up to the tank bottom of two mounting grooves 21, and the filling is provided with fixed block 212 in the holding groove 211, and the one end inlay card that fixed block 212 is close to blow mold 26 is provided with electro-magnet 23, and two blow mold 26 all adopt magnetic metal to make, and electro-magnet 23's functional surface and blow mold 26 butt. One end of the bearing block 22 far away from the mounting groove 21 is provided with a demoulding cylinder 223, and a piston rod of the demoulding cylinder 223 penetrates through the bearing block 22 and is fixedly connected with one end of the fixing block 212 far away from the blow mould 26. The two bearing blocks 22 are respectively connected with a plurality of fixing bolts 221 through threads at one ends which are arranged in a back-to-back mode, and the end portions of the fixing bolts 221 are connected with the blow mold 26 through threads and are not communicated with the molding cavity 263. When the blowing mold 26 needs to be replaced, only the fixing bolt 221 needs to be screwed off, the fixing block 212 is controlled by the demolding cylinder 223 to eject out the blowing mold 26, meanwhile, the blowing mold 26 cannot drop under the adsorption of the electromagnet 23, only the electromagnet 23 is closed, the blowing mold 26 can be separated from the electromagnet 23, and the replacement convenience of the blowing mold 26 is further improved.

Referring to fig. 2 and 4, one end of the fixed block 212 close to the blow mold 26 is higher than the bottom of the installation groove 21, and one end of the blow mold 26 abutting against the bottom of the installation groove 21 is provided with a containing groove 262 for containing the fixed block 212. Through holding groove 262 convenient when installing new blow mold 26 with blow mold 26 and mounting groove 21 alignment, be about for fixed block 212 inlay card to hold groove 262 and can align blow mold 26 with mounting groove 21, start electromagnet 23 adsorbs blow mold 26, and drive fixed block 212 and blow mold 26 through drawing of patterns cylinder 223 and install into mounting groove 21 in, the change that blow mold 26 can be accomplished to fixing bolt 221 again of screwing on, promote the convenience and the accuracy that blow mold 26 changed.

Referring to fig. 5, a rodless cylinder 25 is arranged on the base 14 along the length direction of the base, a sliding rod of the rodless cylinder 25 is arranged on the base 14 along the sliding direction of the mold clamping mechanism 2, two cylinder bodies of the rodless cylinder 25 are arranged on the sliding rod in a sliding manner, two auxiliary rods 141 are further arranged on the base 14 along the sliding direction of the mold clamping mechanism 2, the two auxiliary rods 141 are arranged in parallel with the sliding rod of the rodless cylinder 25, and the two auxiliary rods 141 also penetrate through the cylinder bodies of the two rodless cylinders 25, so that the cylinder bodies of the rodless cylinder 25 can slide more stably. The bottom parts of the two bearing blocks 22 extend out of the connecting plates 222 along the vertical direction, the clamping driving assembly 24 comprises a double-head cylinder, the double-head cylinder is located between the two connecting plates 222, the end parts of two piston rods of the double-head cylinder are respectively connected with the two connecting plates 222, and the cylinder body of the double-head cylinder is fixedly connected with the cylinder body of the rodless cylinder 25. Stabilizer bars 241 are arranged on the two connecting plates 222 of the mold clamping mechanism 2 in a sliding mode, the length of each stabilizer bar 241 is larger than the shape stroke of the double-head cylinder, and the clamping stability of the two bearing blocks 22 is improved. Through the centre gripping of two carrier blocks 22 of double-end cylinder control and separately, be convenient for to the control of carrier block 22, promote the stability of blowing process, make two carrier blocks 22 can stabilize the centre gripping to blow mold 26 when carrying out the blowing simultaneously for two blow mold 26 align and closely butt, promote the leakproofness of shaping chamber 263.

Referring to fig. 2 and 3, the one end of two loading boards all is connected with grip block 27 along the horizontal direction, the one end that two grip blocks 27 are the butt all is equipped with the centre gripping breach 271 that is used for centre gripping product, the one end that centre gripping breach 271 was kept away from to one of them grip block 27 is equipped with riser 272 along vertical direction, the one end that centre gripping breach 271 was kept away from to riser 272 is equipped with cutting cylinder 273, the piston rod that cuts cylinder 273 runs through riser 272 and is connected with the edulcoration blade 274 that is used for cutting the unnecessary material of product, edulcoration blade 274 bottom and grip block 27 bottom butt. The impurity removing blade 274 comprises a knife board 275 arranged along the vertical direction and two blade blades 276 with right-angled triangle sections and positioned at two sides of the bottom of the knife board 275, the knife board 275 is connected with a piston rod of a cutting cylinder 273, and the two blade blades 276 and the knife board 275 are integrally formed. After the clamping plate 27 clamps and fixes the produced blow molding product, the cutting cylinder 273 controls the impurity removing blade 274 to release the impurity material to be cut off at the position of the product bottle mouth, and meanwhile, when the cutting cylinder 273 returns to the impurity removing blade 274, the other blade 276 of the impurity removing blade 274 performs secondary cutting on the bottle mouth of the product, so that the flatness of the product bottle mouth is further improved, and the product quality is improved.

The implementation principle of the hollow blow molding machine in the embodiment of the application is as follows: only need screw off fixing bolt 221 when needing to change blow mold 26, it is ejecting with blow mold 26 to control fixed block 212 through drawing of patterns cylinder 223, blow mold 26 can not drop under the absorption of electro-magnet 23 simultaneously, only close electro-magnet 23, blow mold 26 just can break away from with electro-magnet 23, inlay the holding groove 262 that advances the blow mold 26 that needs to change with fixed block 212 card, can align blow mold 26 with mounting groove 21, it adsorbs blow mold 26 to start electro-magnet 23, and drive fixed block 212 and blow mold 26 through drawing of patterns cylinder 223 and install in mounting groove 21, the change of blow mold 26 can be accomplished to spin on fixing bolt 221 again, promote the convenience and the accuracy that blow mold 26 changed.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.