CN102079118B - Production process for removing burrs on mobile phone shells by freezing - Google Patents

Abstract

The invention relates to a production process for removing burrs on mobile phone shells by freezing. In the process, a rear shell and a front shell of a mobile phone are respectively machined by using a super spray type freezing trimming machine to remove burrs by freezing. Before machining, the technological parameters are set at first: for the rear shell of the mobile phone, the freezing temperature is -35 to -45 DEG C, the ejection time is 3-5min, the ejection rotary speed is 7000-7200rpm, the rotary speed of a roller is 4-5rpm, the pressure of liquid nitrogen is 0.1-1.1Mpa, and the amount for each batch is 160-200pcs; and for the front shell of the mobile phone, the freezing temperature is -40 to -50 DEG C, the ejection time is 4-6min, the ejection rotary speed is 7000-7200rpm, the rotary speed of a roller is 6.3-7.3rpm, the pressure of liquid nitrogen is 0.1-1.1Mpa, and the amount for each batch is 120-160pcs. The process can increase the production efficiency and complete a production task on the basis of guaranteeing the quality of products. As proved by tests on a batch of products, the new production process not only shortens the production cycles and increases the production efficiency, but also reduces the consumption of auxiliary materials and saves the production cost.

Description

Production process for removing burrs on mobile phone shells by freezing

Technical field

The present invention relates to the mobile phone production technology, particularly a kind of production process for removing burrs on mobile phone shells by freezing.

Background technology

Along with the mobile phone market demand day by day increase progressively with market competition day by day fierce, the energy-saving and cost-reducing important part of manufacturing enterprise's work that just becomes.Face the current phone Market Situation, manufacturing enterprise must reduce production costs on the basis that guarantees product quality, enhance productivity, thereby the competitiveness that improves self is dealt with current turn of the market.

Because the variation in market, the increase of the production schedule can not be satisfied current Production requirement far away according to original production process for removing burrs on mobile phone shells by freezing, thereby for adaptation to market variations, at increase equipment or adjusting process makes a choice.Buy a freezing trimmer and no doubt can solve current production problem, but because cost is too high, for cost consideration, this is some waste unavoidably, and in case market changes to some extent, this will cause damage to enterprise.Therefore, on the basis of ensuring the quality of products, adjust original production technology, to enhance productivity, this is current urgent problem.

Summary of the invention

The present invention is in order to enhance productivity, to reduce equipment investment, on the basis that guarantees product quality, changes production technology, shortens the production cycle thereby reach, the purpose that reduces production costs.Production process for removing burrs on mobile phone shells by freezing is the operation of reprocessing for after the machine-shaping of phone housing plastic, this production technology adopts Super Spray formula freezing trimmer that the phone housing plastic of moulding is processed, the setting of its processing parameter directly affects the cell phone appearance quality, also directly affects the production efficiency of this operation simultaneously.The present invention utilizes current available resources, through groping and putting into practice repeatedly, finally successfully finds out the production process for removing burrs on mobile phone shells by freezing that a cover more can adapt to the current condition of production.

The present invention is achieved in that a kind of production process for removing burrs on mobile phone shells by freezing, it is characterized in that: adopt Super Spray formula freezing trimmer that mobile phone battery cover and fore shell are carried out respectively the freezing burr processing of repairing, before the processing, at first set technological parameter, the process parameters range that the processing mobile phone back cover is set is as follows:

Setting the cryogenic temperature scope is-35～-45 ℃; Setting the impelling time range is 3～5min; Setting the impelling rotational velocity range is 7000～7200 rpm; Setting the drum rotation speed scope is 4～5 rpm; Setting the liquid nitrogen pressure range is 0.1～1.1mpa; Batch input amount scope is 160～200pcs;

The process parameters range that the processing mobile phone fore shell is set is as follows:

Setting the cryogenic temperature scope is-40～-50 ℃; Setting the impelling time range is 4～6min; Setting the impelling rotational velocity range is 7000～7200 rpm; Setting the drum rotation speed scope is 6.3～7.3rpm; Setting the liquid nitrogen pressure range is 0.1～1.1mpa; Batch input amount scope is 120～160pcs.

The beneficial effect that the present invention produces is: adopt this production technology, can enhance productivity on the basis that guarantees product quality, finish production task.By the batch products evidence, adopt new production process not only to shorten the production cycle, improve production efficiency, but also reduced the consumption of auxiliary material, saved production cost.

The specific embodiment

The invention will be further described below in conjunction with example.

Before determining new technological parameter, at first the equipment of processing mobile phone shell plastic-Super Spray formula freezing trimmer is analyzed from performance, find out the parameter that affects phone housing plastic part quality and the absolute factor that affects production efficient and relative factor, in conjunction with above factor the original processing parameter value of phone housing plastic is analyzed, preliminary definite phone housing plastic part quality that affects is these three parameters of impelling time, drum rotation speed and batch input amount with the factor key that affects production efficient.

8 batches mobile phone battery cover plastics (motor phone housing plastic) are processed by different technical parameters, after the processing, respectively the outward appearance of plastic is tested according to product standard, technological parameter and the check data of each batch setting the results are shown in Table 1.In addition 8 batches handset front case plastic is processed by different technical parameters, after the processing, respectively the outward appearance of plastic is tested according to product standard, technological parameter and the check data of each batch setting the results are shown in Table 2.

Table 1 mobile phone battery cover plastic processing parameter setting and assay tables of data

Table 2 handset front case plastic processing parameter setting and assay tables of data

By mobile phone battery cover in his-and-hers watches 1, the table 2 and fore shell plastic different batches the assay analysis after draw: the setting value of cryogenic temperature, impelling rotary speed and these several parameters of liquid nitrogen pressure can keep stable substantially, and

Other several parameters as: impelling time, drum rotation speed and batch input amount are the keys that affects product processing quality.Especially drum rotation speed, see Table 1, batch sequence number 1 in the table 2: because the drum rotation speed of back cover and fore shell plastic original start is respectively 2.5 ± 1 rpm and 1.8 ± 0.5 rpm, therefore, first batch of drum rotation speed also set according to initial parameter, although the impelling time is brought up to 9 min, even 10 min, first batch input amount is minimum, processing is by check, also has the burr that does not much have processing to go down, this explanation is processed according to original process, not only can not enhance productivity, and can not guarantee crudy simultaneously.

Think by the situation to first batch and the second lots processed: on the basis that guarantees product processing quality, also to enhance productivity, the impelling time is the key parameter that impact is enhanced productivity, the setting of this parameter value can only reduce, can not improve again, can suitably improve drum rotation speed and suitably improve batch input amount.Therefore, in several batches of follow-up tests, all reduce one by one according to the impelling time; Drum rotation speed improves one by one and suitably controls a batch input amount and set technological parameter, finally makes suitable technique.Can find out by table 1 and table 2: the quality after the processing of the 7th batch products not only meets standard, and can reach the purpose of enhancing productivity.

What this production technology adopted is the Japanese charcoal acid NS-C of Co., Ltd of Showa Corporation type Super Spray formula freezing trimmer.Introduce in the machine by the liquid nitrogen that this equipment will store up in the nitrogen tank, make built-in temperature reach the broken point (cryogenic temperature) of PC material, bullet is dished out in rotation by the impelling wheel, enter cylinder, the again rotation by cylinder, bullet is destroyed burr and the burr of work piece in the cylinder, makes plastic processing meet standard, enters next procedure.

Claims (1)

1. production process for removing burrs on mobile phone shells by freezing, it is characterized in that: adopt the injecting type freezing trimmer that mobile phone battery cover and fore shell are carried out respectively the freezing burr processing of repairing, before the processing, at first set technological parameter, the process parameters range that the processing mobile phone back cover is set is as follows:

Setting the cryogenic temperature scope is-35～-45 ℃; Setting the impelling time range is 3～5min; Setting the impelling rotational velocity range is 7000～7200 rpm; Setting the drum rotation speed scope is 4～5 rpm; Setting the liquid nitrogen pressure range is 0.1～1.1mpa; Batch input amount scope is 160～200pcs;

The process parameters range that the processing mobile phone fore shell is set is as follows:

Setting the cryogenic temperature scope is-40～-50 ℃; Setting the impelling time range is 4～6min; Setting the impelling rotational velocity range is 7000～7200 rpm; Setting the drum rotation speed scope is 6.3～7.3rpm; Setting the liquid nitrogen pressure range is 0.1～1.1mpa; Batch input amount scope is 120～160pcs.