Flaring structure of hollow plastic container down-blowing device

Abstract

The utility model discloses a flaring structure of a hollow plastic container down-blowing device, and belongs to the technical field of plastic product processing devices. Comprising a molten blank expanding arm acting cylinder fixing plate and a set of molten blank expanding mechanisms, the number of the set of molten blank expanding mechanisms is four, and the set of molten blank expanding mechanisms are arranged on the upward side of the molten blank expanding arm acting cylinder fixing plate at equal intervals in a radiation state with a molten blank expanding arm acting cylinder fixing plate receding cavity as the center; each melt blank expansion mechanism comprises a melt blank expansion arm actuating cylinder and a melt blank expansion arm, and the melt blank expansion arm actuating cylinders are fixed with the upward side of the melt blank expansion arm actuating cylinder fixing plate; the tail end of the melt blank expansion arm actuating cylinder column is fixed to a melt blank expansion arm fixing foot on the lower portion of one end of the melt blank expansion arm through a cylinder column tail end fixing block, and the other end of the melt blank expansion arm faces upwards and forms a melt blank expansion plate. The device has the advantages that human participation is not needed, the periphery of the melt blank can be uniformly expanded, and the quality of a hollow plastic container with a cavity expansion part is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic product processing devices, and in particular relates to a flaring structure of a hollow plastic container downblowing device. Background Art

[0002] As is known in the industry, the aforementioned forming methods or forming methods of plastic products generally include extrusion molding, compression molding, vacuum molding, compression molding, transfer molding, blow molding, casting, rotational molding, lamination, calendar coating, foam molding and thermoforming, etc. The aforementioned blow molding is blow molding (also known as "inflation molding"), the process of which is to heat and melt the plastic particles to form a parison, the parison is placed in a blow mold, and then compressed air is injected into the parison to inflate it until it is close to the cavity wall. The inflation pressure is maintained until the plastic part is cooled and shaped, and finally the mold is opened to obtain a hollow plastic part. Because the process uses the pressure of compressed air, the blank is deformed along the mold cavity, so that it is blown into a hollow plastic product of the desired shape.

[0003] The upper blowing method and the lower blowing method are the two main methods in the blow molding process of hollow plastic containers (because there is also a flat blowing method). The upper blowing method is characterized by: directly using the core as the blowing mandrel, and entering the mold from the mandrel. This method is suitable for the production of small containers with necks and tails connected. Although the upper blowing method has a simple structure, convenient operation, and can produce products with relatively uniform wall thickness. However, when the diameter of the film tube is large, the tolerance of the wall thickness, that is, the uniformity of the wall thickness, is difficult to guarantee, and the complete set of equipment occupies a large area. The characteristics of the lower blowing method are: it is suitable for blowing large containers whose necks deviate from the center line of the product, has good adaptability to the complex shapes of hollow plastic containers, and is suitable for blowing containers with special-shaped openings and multiple openings. The advantages of the lower blowing method are that it is conducive to cooling the film tube, convenient film introduction, and good adaptability to raw materials with small particle size and materials requiring transparency. In addition, since the blowing mouth (blowing needle) of the lower blowing method usually does not contact the mold, it will not produce friction, which is conducive to extending the service life of the mold.

[0004] Many hollow plastic containers, such as trash cans and various barrels used by sanitation departments, and various decorative vases and water cups, generally need to expand the molten blank (also called "blank") during the blowing process, so that the blowing needle of the structural system of the blowing mechanism can penetrate into the blank cavity, so that the final blow-molded hollow plastic container with a wide mouth shape, that is, with an expanded part, meets the process requirements.

[0005] The prior art generally uses an online operator to manually (hand) expand the molten blank used for blow molding of hollow plastic containers with wide-mouth shapes, i.e., expansion parts, which are not limited to those exemplified above. Although this primitive operation method can meet the expansion requirements for the molten blank, the artificial expansion of the molten blank varies from person to person, especially even for the same operator, it is difficult or even impossible to ensure the consistency of the expansion tension. Therefore, the product is affected at the least, i.e., the uniformity of the wall thickness of the hollow plastic container is affected, and at worst, it leads to defective products or even scrap, resulting in increased production costs and waste of resources. Utility Model Content

[0006] The utility model aims to provide a flaring structure of a hollow plastic container blowing device which helps to avoid human intervention and can automatically expand the surroundings of the molten blank evenly to ensure the quality of the product with the cavity expansion part.

[0007] The task of the utility model is accomplished in this way: a flaring structure of a hollow plastic container blowing device comprises a molten billet expansion arm cylinder fixing plate and a group of molten billet expansion mechanisms, a molten billet expansion arm cylinder fixing plate clearance cavity for lifting and lowering a blow needle is provided at the central position of the molten billet expansion arm cylinder fixing plate, a group of molten billet expansion mechanisms has four identical structures and are arranged at equal distances in a radial state on the upper side of the molten billet expansion arm cylinder fixing plate clearance cavity as the center, and each molten billet expansion mechanism The invention comprises a molten billet expansion arm actuating cylinder and a molten billet expansion arm, wherein the molten billet expansion arm actuating cylinder is fixed in a horizontal state to the upward side of the molten billet expansion arm actuating cylinder fixing plate, and the molten billet expansion arm actuating cylinder column of the molten billet expansion arm actuating cylinder faces the molten billet expansion arm actuating cylinder fixing plate yielding cavity, and the end of the molten billet expansion arm actuating cylinder column is fixed to the molten billet expansion arm fixing foot at the lower part of one end of the molten billet expansion arm through the cylinder column end fixing block, and the other end of the molten billet expansion arm faces upward and constitutes a molten billet expansion plate with a C-shaped cross-section.

[0008] In a specific embodiment of the present invention, the actuating cylinder of the molten metal expansion arm is a pneumatic cylinder.

[0009] In another specific embodiment of the utility model, a fixed plate left extension ear extends leftward from the center position of the left end of the fixed plate of the molten expansion arm acting cylinder, and a fixed plate right extension ear extends rightward from the center position of the right end.

[0010] In another specific embodiment of the utility model, a left guide rod of a fixed plate is fixed in a longitudinal cantilever state on the side of the left extension ear of the fixed plate facing downward, and a right guide rod of a fixed plate is also fixed in a longitudinal cantilever state on the side of the right extension ear of the fixed plate facing downward; in use, the fixed plate of the molten billet expansion arm actuating cylinder is lifted up and down by the action of the fixed plate lifting mechanism of the molten billet expansion arm actuating cylinder connected thereto, and at the same time, the left guide rod and the right guide rod of the fixed plate are lifted up and down by the lifting and guiding mechanism of the fixed plate of the molten billet expansion arm actuating cylinder.

[0011] In another specific embodiment of the present invention, the fixed plate lifting mechanism of the molten billet expansion arm cylinder includes a fixed plate left lifting cylinder, a fixed plate right lifting cylinder, a left lifting cylinder column connecting rod and a right lifting cylinder column connecting rod. The fixed plate left lifting cylinder is fixedly connected to the fixed plate lifting guide mechanism of the molten billet expansion arm cylinder in a longitudinal cantilever state, and the fixed plate left lifting cylinder column of the fixed plate left lifting cylinder faces upward, and the fixed plate right lifting cylinder is also fixedly connected to the fixed plate lifting guide mechanism of the molten billet expansion arm cylinder in a longitudinal cantilever state, and the fixed plate right lifting cylinder column of the fixed plate right lifting cylinder faces upward, and the left lifting cylinder column connecting rod The upper end is connected to the downward side of the left end of the fixed plate of the molten expansion arm actuating cylinder, and the lower end of the left lifting cylinder column connecting rod is fixedly connected to the central position of the upper end surface of the left lifting cylinder column of the fixed plate at a position corresponding to the clearance hole of the left lifting cylinder column of the fixed plate opened on the lifting guide mechanism of the fixed plate of the molten expansion arm actuating cylinder, the upper end of the right lifting cylinder column connecting rod is connected to the downward side of the right end of the fixed plate of the molten expansion arm actuating cylinder, and the lower end of the right lifting cylinder column connecting rod is fixedly connected to the central position of the upper end surface of the right lifting cylinder column of the fixed plate at a position corresponding to the clearance hole of the right lifting cylinder of the fixed plate opened on the lifting guide mechanism of the fixed plate of the molten expansion arm actuating cylinder.

[0012] In another specific embodiment of the present utility model, the left and right lifting cylinders of the fixed plate are air cylinders.

[0013] In a more specific embodiment of the present invention, the lifting guide mechanism of the molten steel expansion arm cylinder fixing plate includes a lower fixing seat of the left bracket, a left bracket, an upper fixing seat of the left bracket, a left guide rod guide sleeve of the cylinder fixing plate, a lower fixing seat of the right bracket, a right bracket, an upper fixing seat of the right bracket and a right guide rod guide sleeve of the cylinder fixing plate. The lower fixing seat of the left bracket is fixed to the left end of a lifting adjustment plate facing upward, the lower end of the left bracket is fixed to the lower fixing seat of the left bracket by a lower fixing screw of the left bracket, and the upper end of the left bracket is fixed to the upper fixing seat of the left bracket by a left bracket upper fixing screw, and the left guide rod guide sleeve of the cylinder fixing plate is fixed to the left end of the upper fixing seat of the left bracket by a left guide rod guide sleeve screw The lower fixing seat of the right bracket is fixed to the upper side of the right end of the lifting adjustment plate, the lower end of the right bracket is fixed to the lower fixing seat of the right bracket by the lower fixing screw of the right bracket, and the upper end of the right bracket is fixed to the left end of the upper fixing seat of the right bracket by the upper fixing screw of the right bracket, and the right guide rod guide sleeve of the acting cylinder fixing plate is fixed to the right end of the upper fixing seat of the right bracket by the right guide rod guide sleeve screw; the left guide rod of the fixing plate corresponds to the left guide rod guide sleeve of the acting cylinder fixing plate and slides up and down with the left guide rod guide sleeve of the acting cylinder fixing plate, and the right guide rod of the fixing plate corresponds to the right guide rod guide sleeve of the acting cylinder fixing plate and slides up and down with the right guide rod guide sleeve of the acting cylinder fixing plate.

[0014] In a further specific embodiment of the present invention, the fixed plate left lifting cylinder and the fixed plate right lifting cylinder are respectively fixedly connected to the aforementioned left bracket upper fixing seat and the right bracket upper fixing seat in a longitudinal cantilever state.

[0015] In yet another specific embodiment of the present invention, the upper and lower fixing seats of the left bracket, the upper fixing seat of the right bracket and the lower fixing seat of the right bracket are in an L-shape.

[0016] The technical effect of the technical solution provided by the utility model is that: since the molten billet can be automatically expanded inward and outward by a group of molten billet expansion mechanisms arranged on the fixed plate of the molten billet expansion arm cylinder, not only no human intervention is required, but the molten billet can also be evenly expanded all around to ensure the quality of the hollow plastic container with a cavity expansion part. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of an embodiment of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the coordination between the structure and the hollow plastic container downblowing device;

[0019] Figure 3 The utility model is a cycle flow chart of the hollow plastic container downblowing device from receiving the molten billet to completing the expansion of the molten billet bulging portion on the molten billet. DETAILED DESCRIPTION

[0020] In order to more clearly understand the technical essence and beneficial effects of the present invention, the applicant provides a detailed description in the form of embodiments below. However, the description of the embodiments is not a limitation on the present invention. Any equivalent changes made based on the concept of the present invention that are merely formal and not substantial should be regarded as within the scope of the technical solution of the present invention.

[0021] In the following description, all concepts related to up, down, left, right, front and back directions or orientations are based on Figure 2 The position state is taken as an example, and therefore it cannot be understood as a special limitation on the technical solution provided by the utility model.

[0022] See also Figure 1 to Figure 2 And combined with Figure 3 , shows a molten billet expansion arm cylinder fixing plate 5 and a group of molten billet expansion mechanisms 4, wherein a molten billet expansion arm cylinder fixing plate yielding cavity 51 for lifting and lowering the blow needle 3 is provided at the central position of the molten billet expansion arm cylinder fixing plate 5, and a group of molten billet expansion mechanisms 4 has four identical structures (i.e., identical structures) and are arranged at equal distances in a radial state on the upper side of the molten billet expansion arm cylinder fixing plate yielding cavity 51 as the center (also referred to as "surrounding the molten billet expansion arm cylinder fixing plate yielding cavity 51"), and each molten billet expansion mechanism 4 includes a molten billet expansion arm An actuating cylinder 41 and a molten billet expansion arm 42, the molten billet expansion arm actuating cylinder 41 is fixed in a horizontal state to the upward side of the aforementioned molten billet expansion arm actuating cylinder fixing plate 5, and the molten billet expansion arm actuating cylinder column 411 of the molten billet expansion arm actuating cylinder 41 faces the molten billet expansion arm actuating cylinder fixing plate yielding cavity 51, and the end of the molten billet expansion arm actuating cylinder column 411 is fixed to the molten billet expansion arm fixing foot 421 at the lower part of one end of the molten billet expansion arm 42 through a cylinder column end fixing block 4111, and the other end of the molten billet expansion arm 42 faces upward and constitutes a molten billet expansion plate 422 with a C-shaped cross-section.

[0023] In this embodiment, the aforementioned molten steel expansion arm actuating cylinder 41 is a pneumatic cylinder.

[0024] Undoubtedly, the above-mentioned group of molten billet expansion arm actuating cylinders 41 work synchronously, that is, the above-mentioned four molten billet expansion arm actuating cylinders 41 work synchronously. When they work, for example, when the above-mentioned molten billet expansion arm actuating cylinder column 411 extends out of the cylinder body, the molten billet expansion arms 42 move toward each other, that is, they are in a state of relative gathering or mutual convergence; this state can be represented by Figure 3As shown in the second figure from left to right, in this state, the molten billet expansion plate 422 of the molten billet expansion arm 42 does not have the effect of expanding (broadening) the molten billet 30 outward. On the contrary, when the molten billet expansion arm actuating cylinder 41 works in the reverse direction, the molten billet expansion arm actuating cylinder column 411 moves into the cylinder body, driving the molten billet expansion arm 42 to move in the direction of the molten billet expansion arm actuating cylinder 41, that is, the previous displacement in the opposite direction is changed to displacement in the opposite direction, so that the outer arc surface of the molten billet expansion plate 422 is in contact with the inner wall of the molten billet 30, and the molten billet 30 is pushed by Figure 3 The state shown in the third figure from left to right expands outward to form Figure 3 The bulging portion 301 of the molten blank shown (that is, the expansion portion referred to by the applicant in the background technology column above) realizes the expansion function, that is, the function of expanding the molten blank of any container that needs to be expanded. The applicant needs to explain that: Figure 3 This is only an example and does not mean the absolute form of the molten blank 30 .

[0025] As can be seen from the above description, the concept of expansion in the name of the utility model refers to expanding the part of the hollow plastic container that needs to be expanded, for example, by Figure 3 The molten metal 30 shown is expanded to form a bulging portion 301 of the molten metal. The bulging portion 301 of the molten metal (also referred to as an "expanded portion") is an expanded flared portion.

[0026] Please see the key Figure 2 ,exist Figure 2 The figure also shows: a frame platform 10 and a lifting adjustment plate 20. The frame platform 10 is suspended above the floor of the use place by legs or similar components when in use, and a frame platform cavity 101 is provided at the central position of the frame platform 10. The lifting adjustment plate 20 is adjusted up and down corresponding to the upper part of the frame platform 10. A blow needle platform lifting cylinder column clearance hole 201 is provided at the central position of the lifting adjustment plate 20; a blow needle platform lifting mechanism 1 is shown. The blow needle platform lifting mechanism 1 is longitudinally cantilevered with the lifting adjustment at a position corresponding to the frame platform cavity 101. The whole plate 20 is fixedly connected and corresponds to the clearance hole 201 of the aforementioned blow needle platform lifting cylinder column; a blow needle platform 2 is shown, and the blow needle platform 2 is connected to the aforementioned blow needle platform lifting mechanism 1 at a position corresponding to the upper side of the aforementioned lifting adjustment plate 20, and the aforementioned blow needle 3 is fixed at the central position of the blow needle platform 2 and is connected to it by an external pressure air supply pipe not shown in the figure; a lifting adjustment plate up and down adjustment mechanism 8 is shown, the lower part of which is rotatably supported on the aforementioned frame platform 10, the middle part is connected to the aforementioned lifting adjustment plate 20, and the upper part is constructed as a free end.

[0027] Depend on Figure 1As shown, a fixed plate left extension ear 54 extends to the left at the center of the left end (also called the "left side") of the aforementioned molten expansion arm cylinder fixed plate 5, and a fixed plate right extension ear 55 extends to the right at the center of the right end (also called the "right side").

[0028] Depend on Figure 2 As shown, a fixed plate left guide rod 52 is fixed in a longitudinal cantilever state on the side of the aforementioned fixed plate left extension ear 54 facing downward, and a fixed plate right guide rod 53 is also fixed in a longitudinal cantilever state on the side of the aforementioned fixed plate right extension ear 55 facing downward; in the use state, the aforementioned molten billet expansion arm actuating cylinder fixed plate 5 is lifted up and down by the molten billet expansion arm actuating cylinder fixed plate lifting mechanism 6 connected thereto, and at the same time, the fixed plate left guide rod 52 and the fixed plate right guide rod 53 are lifted up and down by the molten billet expansion arm actuating cylinder fixed plate lifting guide mechanism 7.

[0029] See you next time Figure 2 The aforementioned blowing needle platform lifting mechanism 1 includes a blowing needle platform lifting cylinder 11, a blowing needle platform lifting left guide rod 12 and a blowing needle platform lifting right guide rod 13. The blowing needle platform lifting cylinder 11 is fixedly connected to the aforementioned lifting adjustment plate 20 in a longitudinal cantilever state through a blowing needle platform lifting cylinder cylinder body fixing screw 115 at a position corresponding to the aforementioned frame platform cavity 101. The blowing needle platform lifting cylinder column 111 of the blowing needle platform lifting cylinder 11 faces upward and extends upward to the top of the lifting adjustment plate 20 at a position corresponding to the blowing needle platform lifting cylinder column yielding hole 201. The upper end of the blowing needle platform lifting left guide rod 12 is slidably matched with the blowing needle platform lifting left guide rod guide sleeve 121, and the lower end is constituted as a free end. The upper end of the blowing needle platform lifting right guide rod 13 The right guide rod guide sleeve 131 is slidably matched, and the lower end is constituted as a free end. The upper ends of the aforementioned blow needle platform lifting left guide rod guide sleeve 121 and the blow needle platform lifting right guide rod guide sleeve 131 are respectively fixed to the aforementioned lifting adjustment plate 20 through the flange edge formed on the outer wall and screws, and the lower end extends downward to the position corresponding to the aforementioned frame platform cavity 101; the aforementioned blow needle platform 2 is fixedly connected to the top of the aforementioned blow needle platform lifting left guide rod 12 through the blow needle platform left guide rod fixing connection screw 21, and is also fixedly connected to the top of the aforementioned blow needle platform lifting right guide rod 13 through the blow needle platform right guide rod fixing connection screw 22, and is fixedly connected to the top (also called "top surface") of the aforementioned blow needle platform lifting action cylinder column 111 through the cylinder column fixing connection screw 23.

[0030] See you next time Figure 2A cylinder piston body 1111 is formed at the lower end of the blowing needle platform lifting cylinder column 111 of the aforementioned blowing needle platform lifting cylinder 11, and a cylinder piston body sealing ring 11111 is arranged on the cylinder piston body 1111. The cylinder piston body sealing ring 11111 is sealingly slidably matched with the cavity wall of the blowing needle platform lifting cylinder cavity 112 of the blowing needle platform lifting cylinder 11, and the cylinder piston body sealing ring 11111 divides the blowing needle platform lifting cylinder cavity 112 into an upper cavity located above the cylinder piston body sealing ring 11111 and a lower cavity located below the cylinder piston body sealing ring 11111, the blowing needle platform lifting cylinder upper inlet and outlet interface 113 arranged at the upper end of the cylinder body of the blowing needle platform lifting cylinder 11 is communicated with the aforementioned upper cavity, and the blowing needle platform lifting cylinder lower inlet and outlet interface 114 arranged at the lower end of the cylinder body of the blowing needle platform lifting cylinder 11 is communicated with the aforementioned lower cavity.

[0031] The aforementioned blow needle platform lifting cylinder 11 is an oil cylinder or an air cylinder, and when the blow needle platform lifting cylinder 11 is an oil cylinder, the aforementioned upper chamber is an upper oil chamber, the aforementioned lower chamber is a lower oil chamber, the aforementioned blow needle platform lifting cylinder upper inlet and outlet interface 113 is the upper inlet and outlet oil interface of the blow needle platform lifting cylinder, and the aforementioned blow needle platform lifting cylinder lower inlet and outlet interface 114 is the lower inlet and outlet oil interface of the blow needle platform lifting cylinder; when the blow needle platform lifting cylinder 11 is an air cylinder, the aforementioned upper chamber is an upper air chamber, the aforementioned lower chamber is a lower air chamber, the aforementioned blow needle platform lifting cylinder upper inlet and outlet interface 113 is the upper inlet and outlet air interface of the blow needle platform lifting cylinder, and the aforementioned blow needle platform lifting cylinder lower inlet and outlet interface 114 is the lower inlet and outlet air interface of the blow needle platform lifting cylinder.

[0032] In the present embodiment, since the aforementioned blow needle platform lifting cylinder 11 is an oil cylinder, the applicant makes the following explanation. When hydraulic oil is introduced into the lower inlet and outlet interface 114 of the blow needle platform lifting cylinder through the hydraulic oil pipeline, since the aforementioned lower chamber is actually a lower oil chamber, that is, the hydraulic oil enters the lower oil chamber, pushing the cylinder column piston body 1111 upward, and the blow needle platform lifting cylinder column 111 moves upward accordingly and pushes the blow needle platform 2 upward. Due to the guiding effect of the left and right guide rods 12 and 13 for the blow needle platform lifting, the blow needle platform 2 can move upward smoothly, and the aforementioned blow needle 3 set with the blow needle platform 2 as a carrier also moves upward with the upward movement of the blow needle platform 2. The same is true for the opposite case, which will not be repeated. In short, the function of the blow needle platform lifting mechanism 1 is to ensure the rise or fall of the blow needle 3 to meet the requirements of the blow needle platform 2. Figure 3 The blowing (inflation molding) requirements of the molten billet 30 are shown.

[0033] See you next time Figure 2The aforementioned molten ingot expansion arm cylinder fixed plate lifting mechanism 6 includes a fixed plate left lifting cylinder 61, a fixed plate right lifting cylinder 62, a left lifting cylinder column connecting rod 63 and a right lifting cylinder column connecting rod 64. The fixed plate left lifting cylinder 61 is fixedly connected to the aforementioned molten ingot expansion arm cylinder fixed plate lifting guide mechanism 7 in a longitudinal cantilever state, and the fixed plate left lifting cylinder column 611 of the fixed plate left lifting cylinder 61 faces upward, and the fixed plate right lifting cylinder 62 is also fixedly connected to the aforementioned molten ingot expansion arm cylinder fixed plate lifting guide mechanism 7 in a longitudinal cantilever state, and the fixed plate right lifting cylinder column 621 of the fixed plate right lifting cylinder 62 faces upward, and the upper end of the left lifting cylinder column connecting rod 63 is connected to the fixed plate lifting guide mechanism 7 of the molten ingot expansion arm cylinder. The left end of the aforementioned molten billet expansion arm cylinder fixed plate 5 is connected to the downward side, and the lower end of the left lifting cylinder column connecting rod 63 is fixedly connected to the central position of the upper end surface of the left lifting cylinder column 611 of the fixed plate at a position corresponding to the position of the fixed plate left lifting cylinder column yielding hole opened on the molten billet expansion arm cylinder fixed plate lifting guide mechanism 7, and the upper end of the right lifting cylinder column connecting rod 64 is connected to the downward side of the right end of the aforementioned molten billet expansion arm cylinder fixed plate 5, and the lower end of the right lifting cylinder column connecting rod 64 is fixedly connected to the central position of the upper end surface of the right lifting cylinder column 621 of the fixed plate at a position corresponding to the position of the fixed plate right lifting cylinder yielding hole opened on the molten billet expansion arm cylinder fixed plate lifting guide mechanism 7.

[0034] In this embodiment, the aforementioned fixed plate left and right lifting cylinders 61 and 62 are pneumatic cylinders.

[0035] See you next time Figure 2The aforementioned molten steel expansion arm cylinder fixing plate lifting guide mechanism 7 includes a left bracket lower fixing seat 71, a left bracket 72, a left bracket upper fixing seat 73, a cylinder fixing plate left guide rod guide sleeve 74, a right bracket lower fixing seat 75, a right bracket 76, a right bracket upper fixing seat 77 and a cylinder fixing plate right guide rod guide sleeve 78. The left bracket lower fixing seat 71 is fixed to the upper side of the left end of the aforementioned lifting adjustment plate 20, the lower end of the left bracket 72 is fixed to the left bracket lower fixing seat 71 by a left bracket lower fixing screw 721, and the upper end of the left bracket 72 is fixed to the left bracket upper fixing seat 73 by a left bracket upper fixing screw 722, the cylinder fixing plate left guide rod guide sleeve 74 is fixed to the left end of the aforementioned left bracket upper fixing seat 73 by a left guide rod guide sleeve screw 741, and the right bracket lower fixing seat 75 is fixed to the upper fixing seat 73 by a left guide rod guide sleeve screw 741. The fixing seat 75 is fixed to the upper side of the right end of the aforementioned lifting adjustment plate 20, the lower end of the right bracket 76 is fixed to the right bracket lower fixing seat 75 by the right bracket lower fixing screw 761, and the upper end of the right bracket 76 is fixed to the left end of the right bracket upper fixing seat 77 by the right bracket upper fixing screw 762, and the right guide rod guide sleeve 78 of the working cylinder fixing plate is fixed to the right end of the aforementioned right bracket upper fixing seat 77 by the right guide rod guide sleeve screw 781; the aforementioned fixed plate left guide rod 52 corresponds to the aforementioned working cylinder fixing plate left guide rod guide sleeve 74 and slides up and down with the working cylinder fixing plate left guide rod guide sleeve 74; the aforementioned fixed plate right guide rod 53 corresponds to the aforementioned working cylinder fixing plate right guide rod guide sleeve 78 and slides up and down with the working cylinder fixing plate right guide rod guide sleeve 78.

[0036] The aforementioned fixed plate left lifting cylinder 61 and the aforementioned fixed plate right lifting cylinder 62 are respectively fixedly connected to the aforementioned left bracket upper fixing seat 73 and the aforementioned right bracket upper fixing seat 77 in a longitudinal cantilever state.

[0037] Depend on Figure 2 As shown, the upper and lower fixing seats 73, 71 of the left bracket, the upper fixing seat 77 of the right bracket and the lower fixing seat 75 of the right bracket are in an L-shape.

[0038] Since the aforementioned fixed plate left and right lifting cylinders 61, 62 work synchronously, the applicant will only select the former, that is, only the fixed plate left lifting cylinder 61, to explain below: when the fixed plate left lifting cylinder 61 works and the fixed plate left lifting cylinder column 611 extends out of the cylinder body, that is, upward, the fixed plate left lifting cylinder column 611 pushes the left lifting cylinder column connecting rod 63 to move upward, so that the aforementioned molten billet expansion arm cylinder fixed plate 5 carrying the aforementioned four molten billet expansion mechanisms 4 move upward, and vice versa. Since the fixed plate left and right guide rods 52, 53 are provided, it can ensure that the molten billet expansion arm cylinder fixed plate 5 can be steadily raised or lowered as needed.

[0039] The above description confirms that the applicant's previous statement that the fixed plate 5 of the molten billet expansion arm actuating cylinder is lifted up and down by the action of the fixed plate lifting mechanism 6 of the molten billet expansion arm actuating cylinder connected thereto, and at the same time, the fixed plate left guide rod 52 and the fixed plate right guide rod 53 are lifted up and down by the fixed plate lifting guide mechanism 7 of the molten billet expansion arm actuating cylinder.

[0040] See you next time Figure 2 The aforementioned lifting adjustment plate up and down adjustment mechanism 8 includes a left screw sleeve 81, a left screw 82, a left sprocket 83, a right screw sleeve 84, a right screw 85, a right sprocket 86 and a synchronous transmission chain 87. The left screw sleeve 81 is fixed to the left end of the lifting adjustment plate 20. The upper end of the left screw sleeve 81 passes through the left end of the aforementioned lifting adjustment plate 20 and is flush with the upper surface of the lifting adjustment plate 20, while the lower end of the left screw sleeve 81 extends to the lower side of the left end of the lifting adjustment plate 20 in a longitudinal cantilever state. The left screw 82 is matched with the cavity wall thread on the left screw sleeve cavity wall of the left screw sleeve 81 through the left screw thread on its outer wall. The left screw head 821 at the lower end of the left screw 82 is rotatably supported on the frame platform 10 through the left screw head support bearing 8211 (using a "pressure bearing") arranged at the left end of the frame platform 10 and also extends to the bottom of the frame platform 10. The left sprocket 83 is fixed to the aforementioned left sprocket 83 in a flat key fixing manner at a position below the frame platform 10. The screw head 821 is on the right end of the right screw sleeve 84; the right screw sleeve 84 is fixed to the right end of the lifting adjustment plate 20, the upper end of the right screw sleeve 84 passes through the right end of the aforementioned lifting adjustment plate 20 and is flush with the upper surface of the lifting adjustment plate 20, and the lower end of the right screw sleeve 84 extends to the lower side of the right end of the lifting adjustment plate 20 in a longitudinal cantilever state, and the right screw 85 cooperates with the cavity wall thread on the right screw sleeve cavity wall of the right screw sleeve 84 through the screw thread on its outer wall, and the right screw head at the lower end of the right screw 85 851 is rotatably supported on the frame platform 10 by a right screw head supporting bearing 8511 (adopting a "pressure bearing") arranged at the right end of the frame platform 10 and also extends to the bottom of the frame platform 10. The right sprocket 86 is fixed to the aforementioned right screw head 851 in a flat key fixing manner at a position below the frame platform 10. The synchronous transmission chain 87 is sleeved between the left sprocket 83 and the right sprocket 86. In the use state, the synchronous transmission chain 87 is driven by the power device.

[0041] Preferably, a left sprocket limiting nut 822 is provided on the aforementioned left screw 82 and at a position corresponding to the lower part of the aforementioned left sprocket 83, for preventing the left sprocket 83 from escaping from the left screw head 821; and a right sprocket limiting nut 852 is screwed on the aforementioned right screw head 851 and at a position corresponding to the lower part of the aforementioned right sprocket 86, for preventing the right sprocket 86 from escaping from the right screw head 851.

[0042] When the height of the lifting and adjusting plate 20 needs to be reasonably adjusted according to the process requirements, for example, according to the requirements of blowing different specifications and / or types of hollow plastic containers with a molten billet bulge 301 or other similar flared shapes, the synchronous transmission chain 87 is moved under the operation of the aforementioned power device, and the synchronous transmission chain 87 drives the left sprocket 83 and the right sprocket 86 at the same time, and the left and right sprockets 83 and 86 simultaneously and synchronously drive the left and right screw rods 82 and 85 to rotate. For example, when the left screw rod 82 and the right screw rod 85 rotate clockwise, with the rotational cooperation (thread cooperation) of the left screw rod 82 and the left screw sleeve 81 and the rotational cooperation (thread cooperation) of the right screw rod 85 and the right screw sleeve 84, the left and right screw sleeves 81 and 84 are moved upward under the state of jointly driving the lifting and adjusting plate 20, and vice versa, which will not be repeated. It can be seen from this that the function of the left and right screw rods 82 and 85 is to adjust the height of the lifting adjustment plate 20 through the left and right screw rod sleeves 81 and 84.

[0043] See also Figure 3 And combined with Figure 1 and Figure 2 ,exist Figure 3 The figure shows that the molten billet 30 is supplied by the molten billet supply mechanism of the hollow plastic product molding machine, and the molten billet cavity 302 of the molten billet 30 corresponds to the molten billet expansion plate 422 of the molten billet expansion arm 42 of the group of molten billet expansion mechanisms 4 described above, that is, the molten billet expansion plate 422 is located in the molten billet cavity 302. In this state, as described above by the applicant, the molten billet expansion arm actuating cylinder column 411 of the molten billet expansion arm actuating cylinder 41 (four) is in a state of extending (stretching) out of the cylinder body.

[0044] The operation of the aforementioned molten-bill expansion arm actuating cylinder 41 (four) causes the molten-bill expansion arm actuating cylinder column 411 to shrink (retract) into the cylinder body, so that the molten-bill expansion plate 422 expands (enlarges) the molten-bill 30 outward to form a Figure 3 The bulging portion 301 of the molten metal is shown (ie, the "cavity expansion portion" mentioned by the applicant in the above background technology column).

[0045] Above Figure 3 The process has five stages, which form a cycle, as follows: the first is a waiting stage, in which the left and right lifting cylinders 61, 62 of the structural system of the fixed plate lifting mechanism 6 of the expansion arm cylinder of the molten billet are synchronously operated to make the left and right lifting cylinder column connecting rods 63, 64 move downward, driving the fixed plate 5 of the expansion arm cylinder of the molten billet to move downward, so that the blowing needle 3 corresponds to the fixed plate of the expansion arm cylinder to give way to the cavity 51, at this time, because the fixed plate left lifting cylinder column 611 is in a state of returning to the cylinder body, the molten billet expansion plate 422 is in an open state (see Figure 3The second is the stage where the molten billet expansion plate 422 converges and waits for the molten billet, that is, the molten billet expansion plate 422 surrounds and forms a Figure 3 The second figure from left to right shows a state in which the fixed plate 5 of the expansion arm cylinder of the molten billet expansion arm is lifted by the lifting mechanism 6 of the fixed plate of the expansion arm cylinder of the molten billet expansion arm; the third is the stage in which the molten billet 30 descends to a certain position and the expansion plate 422 of the molten billet 30 is expanded, that is, the molten billet 30 is unloaded (descended) to a certain position, and the expansion plate 422 expands the molten billet 30 to form the bulging part 301 of the molten billet; the fourth is the rising stage of the blow needle 3, in which the blowing needle platform lifting mechanism 1 causes the blowing needle platform 2 to carry the blowing needle 3 upward, so that the blowing needle 3 enters the expanded molten billet cavity 302; the fifth is the downward reset stage of the fixed plate 5 of the expansion arm cylinder of the molten billet expansion arm, waiting for a cycle. Since the above five stages are all disclosed by the corresponding step diagrams, although the applicant has only made a brief description, it will not cause confusion in understanding the technical essence of the utility model.

[0046] In summary, the technical solution provided by the utility model makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects stated by the applicant in the technical effect column above.

Claims

1. An expansion structure of a hollow plastic container blowing device, characterized in that: The invention comprises a molten ingot expansion arm cylinder fixing plate (5) and a group of molten ingot expansion mechanisms (4), wherein a molten ingot expansion arm cylinder fixing plate clearance cavity (51) for allowing a blowing needle (3) to be lifted and lowered is provided at the central position of the molten ingot expansion arm cylinder fixing plate (5), and a group of molten ingot expansion mechanisms (4) has four molten ingot expansion mechanisms (4) with the same structure and are arranged at equal distances in a radial state with the molten ingot expansion arm cylinder fixing plate clearance cavity (51) as the center on the upper side of the molten ingot expansion arm cylinder fixing plate (5), and each molten ingot expansion mechanism (4) comprises a molten ingot expansion arm actuating cylinder (41) and a molten ingot expansion arm (42), and the ... The expansion arm actuating cylinder (41) is fixed in a horizontal position to the upward side of the molten billet expansion arm actuating cylinder fixing plate (5), and the molten billet expansion arm actuating cylinder column (411) of the molten billet expansion arm actuating cylinder (41) faces the molten billet expansion arm actuating cylinder fixing plate yielding cavity (51), and the end of the molten billet expansion arm actuating cylinder column (411) is fixed to the molten billet expansion arm fixing foot (421) at the lower part of one end of the molten billet expansion arm (42) through the cylinder column end fixing block (4111), and the other end of the molten billet expansion arm (42) faces upward and forms a molten billet expansion plate (422) with a C-shaped cross-section.

2. The expansion structure of the hollow plastic container blowing device according to claim 1, characterized in that: The molten steel expansion arm actuating cylinder (41) is a pneumatic cylinder.

3. The expansion structure of the hollow plastic container blowing device according to claim 1, characterized in that: A fixed plate left extension ear (54) extends leftwards from the center of the left end of the said molten steel expansion arm cylinder fixed plate (5), and a fixed plate right extension ear (55) extends rightwards from the center of the right end.

4. The expansion structure of the hollow plastic container blowing device according to claim 3, characterized in that: A left guide rod (52) of the fixed plate is fixed in a longitudinal cantilever state on the side of the left extension ear (54) of the fixed plate facing downward, and a right guide rod (53) of the fixed plate is fixed in a longitudinal cantilever state on the side of the right extension ear (55) of the fixed plate facing downward; in the use state, the fixed plate (5) of the molten metal expansion arm actuating cylinder is lifted up and down by the action of the fixed plate lifting mechanism (6) of the molten metal expansion arm actuating cylinder connected thereto, and at the same time, the fixed plate left guide rod (52) and the fixed plate right guide rod (53) are lifted up and down by the fixed plate lifting guide mechanism (7) of the molten metal expansion arm actuating cylinder.

5. The expansion structure of the hollow plastic container blowing device according to claim 4, characterized in that: The fixed plate lifting mechanism (6) of the molten ingot expansion arm cylinder comprises a fixed plate left lifting cylinder (61), a fixed plate right lifting cylinder (62), a left lifting cylinder column connecting rod (63) and a right lifting cylinder column connecting rod (64). The fixed plate left lifting cylinder (61) is fixedly connected to the fixed plate lifting guide mechanism (7) of the molten ingot expansion arm cylinder in a longitudinal cantilever state, and the fixed plate left lifting cylinder column (611) of the fixed plate left lifting cylinder (61) faces upward. The fixed plate right lifting cylinder (62) is also fixedly connected to the fixed plate lifting guide mechanism (7) of the molten ingot expansion arm cylinder in a longitudinal cantilever state, and the fixed plate right lifting cylinder column (621) of the fixed plate right lifting cylinder (62) faces upward. The left lifting cylinder column connecting rod (63) The upper end of the right lifting cylinder column connecting rod (64) is connected to the downward side of the left end of the fixed plate (5) of the molten expansion arm actuating cylinder, and the lower end of the left lifting cylinder column connecting rod (63) is fixedly connected to the central position of the upper end surface of the left lifting cylinder column (611) of the fixed plate at a position corresponding to the clearance hole of the left lifting cylinder column of the fixed plate opened on the lifting guide mechanism (7) of the molten expansion arm actuating cylinder. The upper end of the right lifting cylinder column connecting rod (64) is connected to the downward side of the right end of the fixed plate (5) of the molten expansion arm actuating cylinder, and the lower end of the right lifting cylinder column connecting rod (64) is fixedly connected to the central position of the upper end surface of the right lifting cylinder column (621) of the fixed plate at a position corresponding to the clearance hole of the right lifting cylinder of the fixed plate opened on the lifting guide mechanism (7) of the molten expansion arm actuating cylinder.

6. The expansion structure of the hollow plastic container downward blowing device according to claim 5, characterized in that: The fixed plate left lifting cylinder (61) and the fixed plate right lifting cylinder (62) are air cylinders.

7. The expansion structure of the hollow plastic container blowing device according to claim 5, characterized in that: The ingot expansion arm cylinder fixing plate lifting guide mechanism (7) comprises a left bracket lower fixing seat (71), a left bracket (72), a left bracket upper fixing seat (73), a cylinder fixing plate left guide rod guide sleeve (74), a right bracket lower fixing seat (75), a right bracket (76), a right bracket upper fixing seat (77) and a cylinder fixing plate right guide rod guide sleeve (78). The left bracket lower fixing seat (71) is fixed to the left end of a lifting adjustment plate (20) facing upward. The lower end of the left bracket (72) is fixed to the left bracket lower fixing seat (71) by a left bracket lower fixing screw (721), and the upper end of the left bracket (72) is fixed to the left bracket upper fixing seat (73) by a left bracket upper fixing screw (722). The cylinder fixing plate left guide rod guide sleeve (74) is fixed to the left end of the left bracket upper fixing seat (73) by a left guide rod guide sleeve screw (741). The lower fixing seat (75) of the frame is fixed to the upper side of the right end of the lifting adjustment plate (20), the lower end of the right bracket (76) is fixed to the lower fixing seat (75) of the right bracket by the lower fixing screw (761) of the right bracket, and the upper end of the right bracket (76) is fixed to the left end of the upper fixing seat (77) of the right bracket by the upper fixing screw (762) of the right bracket, and the right guide rod guide sleeve (78) of the cylinder fixing plate is fixed to the right end of the upper fixing seat (77) of the right bracket by the right guide rod guide sleeve screw (781); the left guide rod (52) of the fixing plate corresponds to the left guide rod guide sleeve (74) of the cylinder fixing plate and slides up and down with the left guide rod guide sleeve (74) of the cylinder fixing plate, and the right guide rod (53) of the fixing plate corresponds to the right guide rod guide sleeve (78) of the cylinder fixing plate and slides up and down with the right guide rod guide sleeve (78) of the cylinder fixing plate.

8. The expansion structure of the hollow plastic container blowing device according to claim 7, characterized in that: The fixed plate left lifting cylinder (61) and the fixed plate right lifting cylinder (62) are respectively fixedly connected to the aforementioned left bracket upper fixing seat (73) and the right bracket upper fixing seat (77) in a longitudinal cantilever state.

9. The expansion structure of the hollow plastic container downward blowing device according to claim 7, characterized in that: The left bracket upper fixing seat (73), the left bracket lower fixing seat (71), the right bracket upper fixing seat (77) and the right bracket lower fixing seat (75) are in an L-shape.

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