A mold for blow molding

Abstract

The utility model relates to blow mould technology field, and disclose a mould for blowing, the mould for blowing, including bottom plate, fixed mounting has mounting bracket on the bottom plate, be provided with mould closing subassembly on the mounting bracket, the mould closing subassembly includes hydraulic device, fixed mounting has hydraulic device on the mounting bracket, hydraulic device piston end fixed mounting has one end of slide rod, the other end fixed mounting has limit cylinder of slide rod. The mould for blowing, in order to make the device prolongs mould service life, through being provided with mould closing subassembly, the component cooperation hydraulic device promotes slide rod and drives installation box to move, makes the forming groove of two groups of half cylinders with blow molding groove accurate butt joint, ensures that the plastic part contour is complete, and the limit rod is through the limit plate sliding, cooperates limit round board and restricts the mould closing stroke, avoids half cylinder rigid collision, spring assists the thrust when mould closing, provides compression energy storage when opening mould, shortens the opening mould time.

Description

Technical Field

[0001] This utility model relates to the field of blow molding mold technology, specifically a blow molding mold. Background Technology

[0002] In the field of plastics processing, blow molding is the core process for producing hollow plastic products, and blow molding molds are the key equipment for realizing this process.

[0003] Blow molding molds typically consist of a cavity module, a cooling system, a mold opening and closing mechanism, an venting device, and positioning and guiding components. The cavity module is made of high-strength alloy steel and precision machined, with a surface roughness Ra≤0.8μm to ensure a smooth product surface. The cooling system includes evenly distributed cooling water channels in a spiral or grid layout, with the distance from the cavity wall controlled at 8-15mm. Circulating cooling water quickly removes heat, reducing cooling time to 60% of traditional molds. The mold opening and closing mechanism uses a hydraulically driven guide post and guide sleeve structure with a positioning accuracy of ±0.02mm, ensuring a tight fit between the cavity and the mold when closed. The venting device has 0.02-0.05mm wide venting grooves on the parting surface of the cavity to prevent air bubbles during molding. The positioning and guiding components ensure the stability of the mold opening and closing process.

[0004] However, the above-mentioned equipment has obvious shortcomings in use. Traditional mold closing relies on the single-point push of the hydraulic rod, without guide limit, and the two sets of semi-cylinders have large deviations when they are joined, resulting in flash on the edge of the plastic part, which needs to be trimmed later. Moreover, the flash is prone to cracking. In view of this, we propose a blow molding mold. Utility Model Content

[0005] The purpose of this invention is to provide a blow molding mold to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A blow molding mold includes a base plate, on which a mounting bracket is fixedly mounted. A mold closing assembly is disposed on the mounting bracket, the mold closing assembly comprising:

[0008] A hydraulic device is fixedly mounted on the mounting bracket. One end of a slide rod is fixedly mounted on the piston end of the hydraulic device, and a limit cylinder is fixedly mounted on the other end of the slide rod.

[0009] The mounting box is fixedly installed at the other end of the limiting cylinder. A semi-cylinder is fixedly installed on the mounting box. A molding groove and a blow molding groove are opened on the semi-cylinder.

[0010] A limiting plate is fixedly installed on the mounting bracket. One end of a limiting rod is fixedly installed on the mounting box, and a limiting circular plate is fixedly installed on the other end of the limiting rod. A spring is fixedly installed between the mounting box and the limiting plate.

[0011] In a further embodiment, the mounting bracket, hydraulic device, slide bar, limiting cylinder, mounting box, semi-cylinder, molding groove, blow molding groove, limiting plate, limiting rod, limiting circular plate and spring are provided in multiple sets.

[0012] In a further embodiment, multiple sets of the forming grooves and blow molding grooves are positioned correspondingly, and the limiting rod penetrates the limiting plate.

[0013] In a further embodiment, the limiting rod is located inside the spring, and the limiting circular plate is made of rubber.

[0014] In a further embodiment, the mounting box is provided with a cooling assembly, which includes a motor. The motor is fixedly installed inside the limiting cylinder, and a fan is fixedly installed at the output end of the motor. An air inlet is provided on the limiting cylinder, a filter plate is fixedly installed inside the limiting cylinder, a support column is fixedly installed inside the mounting box, a support strip is fixedly installed between the inside of the mounting box and the semi-cylinder, and an air outlet groove is provided on the mounting box.

[0015] In a further embodiment, multiple sets of the motor, fan, air inlet, filter plate, support column, support bar, and air outlet groove are provided.

[0016] In a further embodiment, the motor and fan are located inside the limiting cylinder, and the filter plate is located at the connection between the limiting cylinder and the mounting box.

[0017] Compared with the prior art, the present invention provides a blow molding mold, which has the following beneficial effects:

[0018] 1. In order to extend the service life of the blow molding mold, the device is equipped with a mold closing assembly. This assembly, together with the hydraulic device, pushes the slide rod to move the mounting box, so that the forming grooves of the two sets of semi-cylinders are precisely aligned with the blow molding groove, ensuring the integrity of the plastic part outline. At the same time, the limiting rod slides through the limiting plate and, together with the limiting circular plate, limits the mold closing stroke to avoid rigid collision of the semi-cylinders. The spring assists the thrust when the mold is closed and provides compression energy when the mold is opened, shortening the mold opening time.

[0019] 2. In order to improve the production efficiency of the blow molding die, a cooling component is set up. This component works with a motor to drive a fan to rotate, draw in cold air through the air inlet, and after the filter plate intercepts the dust, the airflow flows through the channel formed by the support column and the support bar to the semi-cylinder, carrying away the heat of the plastic part in the molding tank. The hot airflow is discharged from the air outlet, so that the plastic part cools down quickly and avoids warping of the plastic part due to uneven cooling. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model in its closed state;

[0021] Figure 2 This is a schematic diagram of the overall structure of this utility model in its open state;

[0022] Figure 3 This is a schematic diagram of the mold clamping assembly of this utility model.

[0023] Figure 4 This is a cross-sectional view of part of the structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the internal structure of the mounting box of this utility model;

[0025] Figure 6 This is a schematic diagram of the cooling component of this utility model.

[0026] Explanation of icon numbers:

[0027] 1. Base plate; 2. Mounting bracket;

[0028] 3. Mold clamping assembly; 31. Hydraulic device; 32. Slide rod; 33. Limiting cylinder; 34. Mounting box; 35. Semi-cylinder; 36. Molding groove; 37. Blow molding groove; 38. Limiting plate; 39. Limiting rod; 310. Limiting circular plate; 311. Spring;

[0029] 4. Cooling components; 41. Motor; 42. Fan; 43. Air inlet; 44. Filter plate; 45. Support column; 46. Support bar; 47. Air outlet. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In this application, the term "above" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is primarily used to better describe this application and its embodiments, and is not intended to limit the indicated device, element, or component to having a specific orientation, or to construct and operate in a specific orientation. Furthermore, the term "above" may also be used in certain circumstances to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0032] Please see Figures 1-6 This utility model provides a technical solution:

[0033] A blow molding mold includes a base plate 1, on which a mounting bracket 2 is fixedly mounted.

[0034] In one embodiment of this utility model, a mold closing assembly 3 is provided on the mounting frame 2. The mold closing assembly 3 includes a hydraulic device 31. The hydraulic device 31 is fixedly mounted on the mounting frame 2. One end of a slide rod 32 is fixedly mounted on the piston end of the hydraulic device 31. A limit cylinder 33 is fixedly mounted on the other end of the slide rod 32. An mounting box 34 is fixedly mounted on the other end of the limit cylinder 33. A semi-cylinder 35 is fixedly mounted on the mounting box 34. A molding groove 36 and a blow molding groove 37 are formed on the semi-cylinder 35. A limit plate 38 is fixedly mounted on the mounting frame 2. A limit rod 39 is fixedly mounted on the mounting box 34. At one end, a limiting rod 39 is fixedly installed at the other end with a limiting circular plate 310. A spring 311 is fixedly installed between the mounting box 34 and the limiting plate 38. The mounting frame 2, hydraulic device 31, sliding rod 32, limiting cylinder 33, mounting box 34, semi-cylinder 35, molding groove 36, blow molding groove 37, limiting plate 38, limiting rod 39, limiting circular plate 310 and spring 311 are provided in multiple sets. The multiple sets of molding groove 36 and blow molding groove 37 are positioned correspondingly. The limiting rod 39 passes through the limiting plate 38 and is located inside the spring 311. The limiting circular plate 310 is made of rubber.

[0035] In this embodiment, when the hydraulic device 31 is activated, the slide bar 32 drives the mounting box 34 to move to the opposite side, so that the molding grooves 36 on the two sets of semi-cylinders 35 are precisely aligned with the blow molding grooves 37 to form a complete cavity, ensuring the integrity of the plastic part's outline. The limiting rod 39 on the mounting box 34 passes through the limiting plate 38 on the mounting frame 2. The limiting circular plate 310 at the end of the limiting rod 39 can limit the mold closing stroke, avoiding damage caused by rigid collision of the semi-cylinders 35. At the same time, high-pressure gas is introduced into the cavity through the blow molding groove 37, so that the raw material adheres to the inner wall of the molding groove 36 to form the required plastic part shape. The spring 311 between the mounting box 34 and the limiting plate 38 is sleeved on the outside of the limiting rod 39. When the mold is closed, the spring 311 is compressed, and the hydraulic device 31 provides thrust. When the mold is opened, the spring 311 releases its stored energy, pushing the mounting box 34 to reset, shortening the mold opening time and extending the mold's service life.

[0036] In one embodiment of this utility model, a cooling assembly 4 is provided on the mounting box 34. The cooling assembly 4 includes a motor 41. The motor 41 is fixedly installed inside the limiting cylinder 33. A fan 42 is fixedly installed at the output end of the motor 41. An air inlet 43 is provided on the limiting cylinder 33. A filter plate 44 is fixedly installed inside the limiting cylinder 33. A support column 45 is fixedly installed inside the mounting box 34. A support bar 46 is fixedly installed between the inside of the mounting box 34 and the semi-cylinder 35. An air outlet groove 47 is provided on the mounting box 34. Multiple sets of motor 41, fan 42, air inlet 43, filter plate 44, support column 45, support bar 46 and air outlet groove 47 are provided. The motor 41 and fan 42 are located inside the limiting cylinder 33. The filter plate 44 is located at the connection between the limiting cylinder 33 and the mounting box 34.

[0037] In this embodiment, the motor 41 inside the limiting cylinder 33 drives the fan 42 to rotate, drawing in cold air through the air inlet 43 on the limiting cylinder 33. The cold air is filtered by the filter plate 44 and then enters the mounting box 34. The support column 45 and the support bar 46 inside the mounting box 34 form an airflow channel. The cold air flows through the channel to the semi-cylinder 35, carrying away the heat of the plastic part in the molding groove 36 and accelerating the cooling of the plastic part. The hot air that has absorbed the heat is discharged from the air outlet 47 on the mounting box 34, preventing the plastic part from warping due to uneven cooling and improving production efficiency.

[0038] All electrical components mentioned in this application are electrically connected to the PLC controller and 220V AC mains power. The PLC controller is a conventional and known device capable of controlling the hydraulic device 31 and the motor 41. All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all conventional methods such as riveting and welding, which are mature in the prior art. The standard parts are all conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art. It should be noted that the above electrical components are all prior art products. Those skilled in the art should select, install, and complete the circuit debugging work according to the needs of use to ensure that all electrical components can work normally. The components are all general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. No specific restrictions are made here. The supporting structures of the hydraulic drive structure mentioned in this application, such as hydraulic tanks and hydraulic pumps, are existing equipment and will not be described in detail here.

[0039] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A mold for blow molding, comprising a base plate (1) on which a mounting frame (2) is fixedly mounted, characterized in that: The mounting bracket (2) is provided with a mold closing assembly (3), the mold closing assembly (3) comprising: Hydraulic device (31), the mounting bracket (2) is fixedly mounted with hydraulic device (31), one end of slide rod (32) is fixedly mounted on the piston end of the hydraulic device (31), and the other end of slide rod (32) is fixedly mounted with limit cylinder (33). Mounting box (34), the other end of the limiting cylinder (33) is fixedly mounted with mounting box (34), a semi-cylinder (35) is fixedly mounted on mounting box (34), and a molding groove (36) and a blow molding groove (37) are opened on the semi-cylinder (35). A limiting plate (38) is fixedly installed on the mounting bracket (2). One end of a limiting rod (39) is fixedly installed on the mounting box (34). A limiting round plate (310) is fixedly installed on the other end of the limiting rod (39). A spring (311) is fixedly installed between the mounting box (34) and the limiting plate (38).

2. A mold for blow molding according to claim 1, characterized in that: The mounting bracket (2), hydraulic device (31), slide bar (32), limiting cylinder (33), mounting box (34), semi-cylinder (35), molding groove (36), blow molding groove (37), limiting plate (38), limiting rod (39), limiting circular plate (310) and spring (311) are provided in multiple sets.

3. A mold for blow molding according to claim 1, characterized in that: The multiple sets of forming grooves (36) and blow molding grooves (37) are positioned correspondingly, and the limiting rod (39) passes through the limiting plate (38).

4. A mold for blow molding according to claim 1, characterized in that: The limiting rod (39) is located inside the spring (311), and the limiting circular plate (310) is made of rubber.

5. A mold for blow molding according to claim 1, wherein: The mounting box (34) is provided with a cooling component (4), the cooling component (4) includes a motor (41), the motor (41) is fixedly installed inside the limiting cylinder (33), a fan (42) is fixedly installed at the output end of the motor (41), an air inlet (43) is provided on the limiting cylinder (33), a filter plate (44) is fixedly installed inside the limiting cylinder (33), a support column (45) is fixedly installed inside the mounting box (34), a support strip (46) is fixedly installed between the inside of the mounting box (34) and the semi-cylinder (35), and an air outlet groove (47) is provided on the mounting box (34).

6. A mold for blow molding according to claim 5, wherein: The motor (41), fan (42), air inlet (43), filter plate (44), support column (45), support bar (46) and air outlet groove (47) are provided in multiple sets.

7. A mold for blow molding according to claim 5, wherein: The motor (41) and fan (42) are located inside the limiting cylinder (33), and the filter plate (44) is located at the connection between the limiting cylinder (33) and the mounting box (34).

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