CN111216339A - A blow molding mechanism with simultaneous linkage of sealing and stretching - Google Patents

Abstract

The invention relates to a blowing mechanism with synchronous linkage of sealing and stretching, which comprises a fixed plate, a sealing component and a stretching component which are arranged on the fixed plate, and a linkage driving component arranged on the fixed plate; the linkage driving assembly comprises a motor arranged on the fixing plate, a rotary table connected with the output end of the motor, a needle roller cam guider, a gear connected with the rotary table and a rack arranged on the fixing plate; the end face of the rotary table is provided with a sliding groove, the needle roller cam guider is positioned in the sliding groove and slides relative to the rotary table, the circumferential side face of the needle roller cam guider is attached to the inner wall of the sliding groove, the rack is meshed with the gear, the sliding groove is provided with an arc groove section and a straight groove section, the arc groove section is communicated with the straight groove section, the circle center of the arc groove section is the same as that of the rotary table, the distance from the arc groove section to the center of the rotary table is larger than that from the straight groove section to the center of the rotary table, the rack is connected with the stretching assembly, and the needle roller cam guider is. The invention belongs to the field of blow molding mechanisms.

Description

Blow molding mechanism with synchronous linkage of sealing and stretching

Technical Field

The invention relates to a blow molding mechanism, in particular to a blow molding mechanism with synchronous linkage of sealing and stretching.

Background

Blow molding, also known as blow molding, is a rapidly evolving plastic processing method. Suitable plastics for blow molding are polyethylene, polyvinyl chloride, polypropylene, polyester, etc., and the resulting hollow containers are widely used as industrial packaging containers. Blow molding can be classified into extrusion blow molding and injection blow molding according to the parison making method, and newly developed are multilayer blow molding and stretch blow molding. In the actual production process, the stretch blow molding generally seals the bottle blank firstly, and then blows and stretches the bottle blank, so that the blowing mechanism is asynchronous with the stretching process, and the production efficiency is reduced. Meanwhile, because the cylinder is used for driving in the prior art, the cylinder needs a certain response process, so that the matching of the sealing production and the stretching production is easy to cause errors, for example, the sealing response is slow, the stretching response is fast, the production quality is reduced, and even scrapped products can be produced.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention aims to: the utility model provides a seal and tensile blow molding machine who links in step constructs, this blow molding machine constructs simple structure, seals and goes on in step with tensile, has guaranteed the quality of production when having improved production efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme:

a blowing mechanism with synchronous linkage of sealing and stretching comprises a fixed plate, a sealing assembly and a stretching assembly which are arranged on the fixed plate in a sliding mode, and a linkage driving assembly arranged on the fixed plate; the linkage driving assembly comprises a motor arranged on the fixing plate, a rotary table fixedly connected with the output end of the motor, a needle roller cam guider arranged on the rotary table, a gear fixedly connected with the rotary table and a rack arranged on the fixing plate in a sliding manner; the rotary table and the rotation center of the gear rotate synchronously, a sliding groove is formed in the end face of the rotary table, the needle roller cam guider is located in the sliding groove and slides relative to the rotary table, the circumferential side face of the needle roller cam guider is attached to the inner wall of the sliding groove, the rack is meshed with the gear, the sliding groove is provided with an arc groove section and a straight groove section, the arc groove section is communicated with the straight groove section, the circle center of the arc groove section is the same as that of the rotary table, the distance from the arc groove section to the center of the rotary table is larger than that from the straight groove section to the center of the rotary table, the rack is fixedly connected with the stretching assembly, and the needle roller cam guider. The carousel drives under the drive of motor and seals subassembly and tensile subassembly and move down simultaneously, utilizes the spout control to seal the stroke of subassembly for blow molding mechanism seals and stretches the bottle base in proper order.

Further, the method comprises the following steps: the fixed plate is fixedly provided with a guide rail, the guide rail is provided with a first sliding block and a second sliding block in a sliding manner, the sealing assembly and the stretching assembly are arranged on the guide rail in a sliding manner through the first sliding block and the second sliding block respectively, and the sealing assembly is positioned below the stretching assembly. The sealing assembly and the stretching assembly can be guided to move up and down through the guide rails.

Further, the method comprises the following steps: the sealing assembly comprises a connecting block fixedly connected with the needle roller cam guider, a first sliding frame fixedly connected with the connecting block, and a sealing unit arranged on the first sliding frame; the first sliding frame is fixed on the first sliding block. The sealing component can seal the bottle mouth of the bottle blank.

Further, the method comprises the following steps: the sealing unit is provided with a plurality of sealing units which are horizontally and uniformly distributed along the second sliding frame, and the sealing units comprise sealing cylinders arranged on the first sliding frame and sealing embryo heads fixedly connected with the output ends of the sealing cylinders. A plurality of units of sealing seal a plurality of bottle base simultaneously, provide production efficiency.

Further, the method comprises the following steps: the stretching assembly comprises a second sliding frame fixed on the second sliding block and a pull rod fixed on the second sliding frame; the rack is fixedly connected with the second sliding frame, one end of the pull rod is fixed on the second sliding frame, the other end of the pull rod sequentially penetrates through the sealing cylinder and the sealing embryo head, and the pull rod is provided with a plurality of sealing units which are in one-to-one correspondence with the plurality of sealing units. After the sealing assembly seals the bottle mouth of the bottle blank, the pull rod of the stretching assembly performs blow molding stretching on the bottle blank.

Further, the method comprises the following steps: the blow molding mechanism with the synchronous linkage of the sealing and the stretching also comprises a first anti-collision block, a first limiting block and a second limiting block; the first anti-collision block is fixed on the first sliding frame and located between the first sliding frame and the second sliding frame, the first limiting block is fixed on the fixed plate and located below the first sliding frame, and the second limiting block is fixed on the fixed plate and located above the second sliding frame. First anticollision piece can prevent to seal subassembly and tensile subassembly and bump, and first stopper and second stopper carry on spacingly to first carriage and second carriage respectively, prevent that first carriage and second carriage from breaking away from the guide rail.

Further, the method comprises the following steps: the blow molding mechanism with synchronous linkage of sealing and stretching also comprises a guide post; the guide pillar is fixed on the fixing plate, the bearing is rotatably mounted on the guide pillar, and the circumferential side face of the bearing is tangent to the side face of the rack. The guide post guides the turntable to rotate, and the bearing can guide the rack to slide up and down and prevent the rack from shifting in the horizontal direction.

Further, the method comprises the following steps: still set firmly the navigation key on the fixed plate, navigation key and guide rail all have two, and two guide rails are parallel to each other, and the carousel is located between two guide rails, and two navigation keys are located two guide rails next door respectively and contact with the guide rail. The positioning key can prevent the guide rail from shifting.

Further, the method comprises the following steps: the blow molding mechanism synchronously linked with the sealing and stretching further comprises a first detection switch for detecting the position of the first sliding frame and a second detection switch for detecting the position of the second sliding frame; first detection switch and second detection switch all fix at the fixed plate. The first detection switch and the second detection switch may detect whether the first carriage and the second carriage return to the origin, respectively.

Further, the method comprises the following steps: the diameter of the needle roller cam guider is equal to the width of the sliding groove, one end of the arc groove section is communicated with one end of the straight groove section, and the other end of the arc groove section is tangent to and not communicated with the other end of the straight groove section. The needle roller cam guider slides along the sliding groove, and in the sliding process, the sealing assembly descends or is still by controlling the distance from the needle roller cam guider to the center of the turntable.

In summary, the present invention has the following advantages:

this blow molding machine who seals and stretch synchronous linkage can realize sealing in step and tensile to the bottle base, through a motor for seal and tensile can go on in step, when realizing that seal assembly and tensile subassembly start simultaneously, also realized sealing and tensile work go on in proper order. The blowing mechanism is used for synchronously sealing and stretching, the problems of slow response and instability of pneumatic driving modes and the like are solved, and the problem that the matching precision of the sealing process and the stretching process is reduced when the sealing process and the stretching process are respectively driven by different driving modes is avoided. The blow molding mechanism is simple in structure, and production quality can be guaranteed while production efficiency can be improved.

Drawings

FIG. 1 is a schematic structural view of a blow molding mechanism with simultaneous sealing and stretching.

Fig. 2 is a schematic structural diagram of the fixing plate, the linkage driving assembly, the stretching assembly and the guide rail.

Fig. 3 is a schematic structural diagram of the fixing plate, the linkage driving assembly and the first limiting block.

Fig. 4 is a schematic diagram of the structure at a in fig. 3.

Fig. 5 is a schematic structural view of the turntable.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and detailed description.

To facilitate a uniform view of the various reference numbers within the drawings, reference numbers appearing in the drawings are now described collectively as follows:

the device comprises a fixing plate 1, a motor 2, a rotary table 3, a switch bracket 4, a needle roller cam guider 5, a gear 6, a rack 7, a sliding groove 8, a guide rail 9, a first sliding block 10, a second sliding block 11, a connecting block 12, a first sliding frame 13, a sealing unit 14, a second sliding frame 15, a pull rod 16, a first anti-collision block 17, a first limiting block 18, a second limiting block 19, a guide pillar 20, a bearing 21, a positioning key 22, a first detection switch 23, a second detection switch 24, an arc groove section 8-1, a straight groove section 8-2, a sealing cylinder 14-1 and a sealing blank head 14-2.

Referring to fig. 1, 2, 3, 4 and 5, a blow molding mechanism with synchronous linkage of sealing and stretching includes a fixed plate, a sealing component and a stretching component both slidably mounted on the fixed plate, and a linkage driving component mounted on the fixed plate; the sealing component and the stretching component can slide up and down under the driving of the linkage driving component, and the sealing component is positioned below the stretching component. The linkage driving assembly comprises a motor arranged on the fixing plate, a rotary table fixedly connected with the output end of the motor, a needle roller cam guider arranged on the rotary table, a gear fixedly connected with the rotary table and a rack arranged on the fixing plate in a sliding manner; the machine body of the motor is fixedly arranged on the fixed plate, the center of the rotary plate is provided with a rotary shaft, the output end of the motor is fixedly connected with the rotary shaft of the rotary plate through a coupler, and the rotary plate is driven to synchronously rotate when the motor rotates. The carousel is the same and synchronous rotation with the rotation center of gear, is equipped with the spout on the terminal surface of carousel, and the gear is fixed on the terminal surface of carousel, and spout and gear all are located the same terminal surface of carousel, and the gear is enclosed by the spout. The needle roller cam guider is positioned in the sliding groove and slides relative to the rotating disc, the circumferential side face of the needle roller cam guider is attached to the inner walls of the two sides of the sliding groove, and the needle roller cam guider can only roll along the length direction of the sliding groove. The rack is fixedly connected with the stretching assembly, and the needle roller cam guider is fixedly connected with the sealing assembly. The upper end of the rack is connected with the stretching structure, the rack is meshed with the gear, and when the turntable drives the gear to rotate, on one hand, the sealing assembly is driven to move up and down by the sliding of the needle roller cam guider in the chute; on the other hand drives tensile subassembly through rack and pinion and reciprocates, realizes driving simultaneously through a motor and seals subassembly and tensile subassembly and remove. The sliding groove is provided with an arc groove section and a straight groove section, the arc groove section is communicated with the straight groove section, and the needle roller cam guider on the needle roller cam guider can roll to the straight groove section from the arc groove section and also can roll to the arc groove section from the straight groove section. The circle center of the arc groove section is the same as that of the rotary table, namely, when the needle roller cam guider rolls in the arc groove section, the distance from the needle roller cam guider to the center of the rotary table is unchanged, so that when the needle roller cam guider slides relative to the rotary table (the rotary table rotates, and the position of the needle roller cam guider is unchanged), the needle roller cam guider can be kept at the same position, and the needle roller cam guider is always positioned at a position close to the lower circumferential side face of the rotary table. The distance from the arc groove section to the center of the rotary table is greater than the distance from the straight groove section to the center of the rotary table, when the needle roller cam guider is arranged on the straight groove section from the arc groove section, the needle roller cam guider is closer to the center of the rotary table, but the center of the rotary table is fixed, so the needle roller cam guider can move upwards, and the sealing assembly is driven to move upwards; on the contrary, when the needle roller cam guider rolls from the straight groove section to the circular arc groove section, the needle roller cam guider can move downwards, so that the sealing assembly is driven to move downwards.

The straight groove section is obliquely arranged, namely when the needle roller cam guide is at different positions on the straight groove section, the distances from the needle roller cam guide to the center of the turntable are different, when the needle roller cam guide slides on the straight groove section and approaches the arc groove section, the needle roller cam guide is farthest away from the center of the turntable, and the sealing assembly moves downwards to the lower limit; when the needle roller cam guider is far away from the arc groove section, the needle roller cam guider is closest to the center of the rotary table, and the sealing assembly moves upwards to be limited.

When the roller pin cam guider rolls in the arc groove section, the distance between the roller pin cam guider and the center of the rotary table is kept unchanged, the sealing assembly cannot move up and down, but the rotary table still rotates, and the gear and the rack still drive the stretching assembly to move.

The fixed plate is fixedly provided with a guide rail, the guide rail is provided with a first sliding block and a second sliding block in a sliding manner, the sealing assembly and the stretching assembly are arranged on the guide rail in a sliding manner through the first sliding block and the second sliding block respectively, and the sealing assembly is positioned below the stretching assembly. The guide rail is vertically arranged, and the first sliding block is positioned below the second sliding block.

The sealing assembly comprises a connecting block fixedly connected with the needle roller cam guider, a first sliding frame fixedly connected with the connecting block, and a sealing unit arranged on the first sliding frame; the first sliding frame is horizontally arranged, the first sliding frame is fixedly connected with the needle roller cam guider through a connecting block, the first sliding frame is fixed on the first sliding block, the first sliding frame is arranged on the guide rail through the first sliding block, the guide rail limits the first sliding frame to only slide up and down, so that the needle roller cam guider cannot move in the horizontal direction (left and right), and the needle roller cam guider is always kept below the gear.

The sealing unit is provided with a plurality of sealing units which are horizontally and uniformly distributed along the second sliding frame, and the sealing units comprise sealing cylinders arranged on the first sliding frame and sealing embryo heads fixedly connected with the output ends of the sealing cylinders. Set up a plurality of units of sealing and can seal a plurality of bottle embryo simultaneously, improve production efficiency.

The stretching assembly comprises a second sliding frame fixed on the second sliding block and a pull rod fixed on the second sliding frame; the rack is vertically arranged, the gear teeth are arranged on one side of the rack, the upper end of the rack is fixedly connected with the second sliding frame, and when the rotary table rotates, the gear drives the rack to move up and down, so that the second sliding frame is driven to move up and down along the guide rail. One end of the pull rod is fixed on the second sliding frame, the other end of the pull rod sequentially penetrates through the sealing cylinder and the sealing embryo head from top to bottom, the pull rod is provided with a plurality of pieces, the plurality of pieces and the plurality of sealing units are in one-to-one correspondence, the bottle embryos are sealed and stretched simultaneously, and production efficiency is improved. The closure unit and the stretching assembly belong to the prior art and their construction is not described in detail here.

The blow molding mechanism with the synchronous linkage of the sealing and the stretching also comprises a first anti-collision block, a first limiting block and a second limiting block; the first anti-collision block is fixed on the upper end face of the first sliding frame and located between the first sliding frame and the second sliding frame, and the first anti-collision block prevents the first sliding frame from colliding with the second sliding frame. The first limiting block is fixed on the fixing plate and located below the first sliding frame, and the first limiting block prevents the first sliding frame from exceeding a travel range and being separated from the guide rail when sliding downwards, so that the sealing assembly is prevented from being damaged. The second limiting block is fixed on the fixing plate and located above the second sliding frame, and the second limiting block prevents the second sliding frame from exceeding the travel range and being separated from the guide rail when sliding upwards, so that the stretching assembly is prevented from being damaged.

The blow molding mechanism with synchronous linkage of sealing and stretching also comprises a guide post; the guide pillar can prevent that the rack from taking place lateral shifting, and the guide pillar is fixed on the fixed plate, and the bearing is installed to the last rotation type of guide pillar, and the circumference side of bearing is tangent with the side of rack, and the distance between bearing and the gear can only hold down the rack and slide from top to bottom, and the lateral shifting of restriction rack for the rack all the time with gear engagement, the bearing makes reciprocating of rack easier through the rotation of self again.

Still set firmly the navigation key on the fixed plate, navigation key and guide rail all have two, two guide rails are parallel to each other, the carousel is located between two guide rails, two navigation keys are located two guide rail next doors respectively and contact with the guide rail, the navigation key can prevent that the guide rail from taking place lateral shifting, make two guide rails remain throughout vertical, two guide rails all have first slider and second slider, seal subassembly and tensile subassembly through two guide rail guides and reciprocate, make the removal that seals subassembly and tensile subassembly more steady, the atress is more balanced.

The blow molding mechanism synchronously linked with the sealing and stretching further comprises a first detection switch for detecting the position of the first sliding frame and a second detection switch for detecting the position of the second sliding frame; first detection switch and second detection switch all fix on the fixed plate through the switch support. The first detection switch is close to the lower end of the guide rail, and the first detection switch can detect the position of the sealing assembly when the sealing assembly moves to the lowest point. The first detection switch is close to the upper end of the guide rail, and the second detection switch can detect the position of the stretching assembly when the stretching assembly moves to the highest point. When the moving component of the sealing component or the stretching component is abnormal in the working process, the blow molding mechanism can automatically stop running and send out an alarm.

The diameter of the needle roller cam guider is equal to the width of the sliding groove, so that the needle roller cam guider can only roll along the length direction of the sliding groove, and the rolling direction of the needle roller cam guider is unique. One end of the arc groove section is communicated with one end (the end farthest from the center of the turntable) of the straight groove section; the other end of the arc groove section is tangent with and not communicated with the other end (the end nearest to the center of the turntable) of the straight groove section, and the needle roller cam guide reaches the limit position when sliding to the other end (the end nearest to the center of the turntable) of the straight groove section. The rolling of the needle roller cam guider in the chute is not a circular motion, but a reciprocating motion.

The working principle of the blowing mechanism with synchronous linkage of sealing and stretching is as follows:

the origin position of the blow molding mechanism is as follows: the sealing assembly and the stretching assembly are positioned on the upper limit of the guide rail, and the needle roller cam guide is positioned at the tail end of the straight groove section of the sliding groove (namely, away from the arc groove section, at the moment, the needle roller cam guide is closest to the rotating center of the rotating disc). Firstly, the blow molding mechanism is started, the rotary disc and the gear synchronously rotate under the driving of the motor, when the rotary disc drives the stretching assembly to move downwards, the needle roller cam guider slides towards the arc groove section at first in the straight groove section, and when the needle roller cam guider moves in the straight groove section, the needle roller cam guider can be slowly far away from the center of the rotary disc, so that the needle roller cam guider drives the sealing assembly to slide downwards to be close to a bottle blank and seal a bottle mouth, and the sealing assembly and the stretching assembly can simultaneously move downwards together. After the sealing assembly seals the bottle mouth, the sealing assembly does not need to move downwards any more, and the needle roller cam guider can slide to the arc groove section and slide in the arc groove section at the moment, so that the needle roller cam guider and the center of the turntable in the arc groove section are kept unchanged, and the needle roller cam guider does not move downwards any more at the moment, so that the sealing assembly is kept still, but the gear and the rack still drive the stretching assembly to move downwards to stretch the bottle blank, and the blow molding mechanism completes the sealing and stretching processes in sequence. After the sealing and stretching are completed, the rotary table is reversely rotated, the needle roller cam guide firstly slides along the arc groove section, the distance from the needle roller cam guide to the center of the rotary table is unchanged, the sealing assembly is temporarily fixed, but the gear rack drives the stretching assembly to move upwards at the moment. When the needle roller cam guider slides to the straight groove section, the distance between the needle roller cam guider and the center of the rotary table is closer and closer, so that the sealing assembly and the stretching assembly move upwards together, and one working cycle is realized. The sealing component and the stretching component are driven to move up and down by the same motor, and meanwhile, due to the fact that the design of the sliding groove enables the sealing component and the stretching component to move in different strokes, the sealing action and the stretching action can be carried out successively, and the process sequence is guaranteed. When the sealing component and the stretching component are respectively driven, the problem that the sealing action and the stretching action are difficult to accurately match is easily caused, particularly when an air cylinder or a hydraulic cylinder is adopted, a certain time is needed for response of the air cylinder or the hydraulic cylinder, a starting time error is easily caused, when bottle blanks are sealed and stretched, the time of one working cycle is very short, if the response of the previous action is slow, the next action can cause influence, the sequence of working procedures is changed, the production quality is influenced, and even scrapped products can be generated.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (10)

1. The utility model provides a seal blow molding machine who links with tensile synchronization which characterized in that: comprises a fixed plate, a sealing component and a stretching component which are all arranged on the fixed plate in a sliding way, and a linkage driving component arranged on the fixed plate; the linkage driving assembly comprises a motor arranged on the fixing plate, a rotary table fixedly connected with the output end of the motor, a needle roller cam guider arranged on the rotary table, a gear fixedly connected with the rotary table and a rack arranged on the fixing plate in a sliding manner; the rotary table and the rotation center of the gear rotate synchronously, a sliding groove is formed in the end face of the rotary table, the needle roller cam guider is located in the sliding groove and slides relative to the rotary table, the circumferential side face of the needle roller cam guider is attached to the inner wall of the sliding groove, the rack is meshed with the gear, the sliding groove is provided with an arc groove section and a straight groove section, the arc groove section is communicated with the straight groove section, the circle center of the arc groove section is the same as that of the rotary table, the distance from the arc groove section to the center of the rotary table is larger than that from the straight groove section to the center of the rotary table, the rack is fixedly connected with the stretching assembly, and the needle roller cam guider.

2. A closure and stretch blow molding apparatus in accordance with claim 1, wherein: the fixed plate is fixedly provided with a guide rail, the guide rail is provided with a first sliding block and a second sliding block in a sliding manner, the sealing assembly and the stretching assembly are arranged on the guide rail in a sliding manner through the first sliding block and the second sliding block respectively, and the sealing assembly is positioned below the stretching assembly.

3. A closure and stretch blow molding apparatus in accordance with claim 2, wherein: the sealing assembly comprises a connecting block fixedly connected with the needle roller cam guider, a first sliding frame fixedly connected with the connecting block, and a sealing unit arranged on the first sliding frame; the first sliding frame is fixed on the first sliding block.

4. A closure and stretch blow molding apparatus in accordance with claim 2, wherein: the unit of sealing has a plurality of, and a plurality of seals the unit along second carriage horizontal direction evenly distributed, seals the unit including installing the jar that seals on first carriage, with seal a jar output fixed connection's the embryo head that seals.

5. A blowing mechanism with synchronous linkage of sealing and stretching according to claim 4, characterized in that: the stretching assembly comprises a second sliding frame fixed on the second sliding block and a pull rod fixed on the second sliding frame; the rack is fixedly connected with the second sliding frame, one end of the pull rod is fixed on the second sliding frame, the other end of the pull rod sequentially penetrates through the sealing cylinder and the sealing embryo head, and the pull rod is provided with a plurality of sealing units which are in one-to-one correspondence with the plurality of sealing units.

6. A blowing mechanism with synchronous linkage of sealing and stretching according to claim 5, characterized in that: the blow molding mechanism with the synchronous linkage of the sealing and the stretching also comprises a first anti-collision block, a first limiting block and a second limiting block; the first anti-collision block is fixed on the first sliding frame and located between the first sliding frame and the second sliding frame, the first limiting block is fixed on the fixed plate and located below the first sliding frame, and the second limiting block is fixed on the fixed plate and located above the second sliding frame.

7. A closure and stretch blow molding apparatus in accordance with claim 1, wherein: the blow molding mechanism with synchronous linkage of sealing and stretching also comprises a guide post; the guide pillar is fixed on the fixing plate, the bearing is rotatably mounted on the guide pillar, and the circumferential side face of the bearing is tangent to the side face of the rack.

8. A closure and stretch blow molding apparatus in accordance with claim 2, wherein: still set firmly the navigation key on the fixed plate, navigation key and guide rail all have two, and two guide rails are parallel to each other, and the carousel is located between two guide rails, and two navigation keys are located two guide rails next door respectively and contact with the guide rail.

9. A closure and stretch blow molding apparatus in accordance with claim 2, wherein: the blow molding mechanism synchronously linked with the sealing and stretching further comprises a first detection switch for detecting the position of the first sliding frame and a second detection switch for detecting the position of the second sliding frame; first detection switch and second detection switch all fix at the fixed plate.

10. A closure and stretch blow molding apparatus in accordance with claim 1, wherein: the diameter of the needle roller cam guider is equal to the width of the sliding groove, one end of the arc groove section is communicated with one end of the straight groove section, and the other end of the arc groove section is tangent to and not communicated with the other end of the straight groove section.

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